Arista-Architecting Low Latency Cloud Networks whitepaper-chinese

收稿日期：2021-01-10。

项目来源：湖北省自然资源厅科技项目（ZRZY2020KJ09）。

省级卫星中心遥感数据管理服务平台建设实践周长雯1,闵天1,祁信舒1,张霞2（1.湖北省航测遥感院，湖北武汉430074；2.湖北省测绘工程院，湖北武汉430074）摘要：以省级卫星中心遥感数据综合管理服务平台建设为例，设计了基于Web 服务器、PostgreSQL 数据库、C/S 架构、B/S架构等技术的遥感数据管理方法。

通过建设实践解决大规模遥感数据和信息产品共享中的多项关键技术，消除了目前空间数据分散和信息孤岛现象，提高了遥感数据查询、获取的准确性和时效性，实现了信息资源共享和高效服务。

省级遥感数据管理服务平台的构建，为自然资源管理部门及社会公众提供了及时有效的动态监测信息和科学决策，可进一步推广应用在市县卫星应用技术中心节点的建设中。

关键词：卫星中心；遥感数据；平台建设；PostgreSQL 数据库；共享服务中图分类号：P237文献标志码：B文章编号：1672-4623（2022）06-0135-04Remote Sensing Data Management Service Platform Construction and Practice forProvincial Satellite CenterZHOU Changwen 1,MIN Tian 1,QI Xinshu 1,ZHANG Xia 2（1.Hubei Institute of Photogrammetry and Remote Sensing,Wuhan 430074,China;2.Hubei Institute of Surveying and Mapping,Wuhan 430074,China ）Abstract:Taking the provincial satellite center remote sensing data integrated management service platform construction as an example,we de-signed remote sensing data management methods based on Web server,PostgreSQL database,C/S architecture,B/S architecture and other tech-nologies.Through construction and practice to solve a few key technologies in the sharing of large-scale remote sensing data and information products,eliminate the current spatial data dispersion and information island phenomenon,and improve the accuracy and timeliness of remote sensing data query and acquisition,we achieved information resource sharing and efficient service.The provincial remote sensing data manage-ment service platform construction provides the natural resource management department and public with timely and effective dynamic monitor-ing information and scientific decision-making,which can be further promoted and applied in city and county satellite application technology cen-ter node construction.Key words:satellite center,remote sensing data,platform construction,PostgreSQL database,shared services随着我国“高分辨对地观测”重大专项和“空间基础设施”的实施，遥感对地观测获取能力逐步提升，推送的卫星对地观测数据量呈较大的增长趋势。

高考英语《语法填空＋阅读理解＋应用文写作》真题含答案Ⅰ.语法填空5th World Media Summit, and other significant events, once again highlighting its role as1.________ window for the world to comprehend China's high­quality development. So,2.________ Guangzhou? Let's find out.3．________ (gain) a deeper understanding of China, one must experience its history and culture. With a history of over 2，000 years and a rich cultural heritage, Guangzhou offers a variety of historical and cultural 4.________ (treasure). In this city, you can sip (呷) a cup of coffee while watching Cantonese opera in Yongqingfang or taste Cantonese dim sum (点心) while gazing at Western­style architecture on Shamian Island.The economy is another crucial aspect in understanding China. In recent years, Guangzhou has 5.________ (active) participated in the Belt and Road international cooperation, gradually 6.________ (establish) an all­round, multi­level, and wide­ranging pattern of opening­up. As a thousand­year­old commercial city known for the Canton Fair, Guangzhou has drawn 7.________ (globe) attention with its open genes and prosperous economy.Connecting with the world also requires a highly 8.________ (develop) transportation network. Guangzhou has constructed a modern three­dimensional transportation system that links airports, seaports, railway ports, and digital ports, providing easy access 9.________ both domestic and foreign participants.Guangzhou's openness, inclusiveness, vitality, and innovative spirit make it an ideal choice for hosting international events, which, in turn, 10.________ (help) the economic and social development of the city.【语篇解读】本文是一篇说明文。

stable difusion lora列举"Stable Diffusion of LoRa: A Multitude of Possibilities"Introduction to LoRa and Its Stable DiffusionIn recent years, the Internet of Things (IoT) has gained significant attention, with the promise of creating a network of connected devices that can enhance our daily lives. However, one of the challenges faced in building a robust IoT infrastructure is finding a stable and efficient communication protocol. This is where LoRa (Long Range) technology comes into play. In this article, we will explore the stable diffusion of LoRa, discussing its benefits, applications, and the steps involved in implementing it.Understanding LoRaLoRa is a wireless communication technology that enableslong-range and low-power communication for the IoT. Developed by Semtech, it is a popular choice due to its ability to provide reliable communication over a wide range of distances while consuming minimal power. LoRa operates in the unlicensed Industrial, Scientific, and Medical (ISM) bands, which allow forseamless deployment without needing to obtain additional licenses.Benefits of Using LoRa1. Long Range: One of the key advantages of LoRa technology is its ability to transmit and receive data over long distances, ranging from a few kilometers in urban areas to tens of kilometers in rural areas. This extended range makes it ideal for applications that require communication over large geographical areas.2. Low Power Consumption: LoRa devices are designed to consume minimal power, which makes them suitable for battery-operated IoT devices. By using power-efficient modulation schemes, LoRa devices can operate for extended periods without the need for frequent battery replacements.3. Low Cost: LoRa technology offers an affordable solution for IoT deployments. With its long-range capabilities, fewer base stations are required to cover a given area, reducing infrastructure costs. Additionally, LoRa devices are relatively inexpensive and readily available in the market.4. High Scalability: LoRa supports a large number of devices simultaneously, making it suitable for applications with a high density of IoT devices. This scalability ensures that the network can handle an increasing number of connected devices without compromising on performance.Applications of LoRa1. Smart Agriculture: LoRa technology finds extensive application in the agricultural sector, enabling farmers to monitor and manage their crops more efficiently. With LoRa-enabled sensors placed throughout the farmland, farmers can collect real-time data on soil moisture, temperature, and humidity, allowing them to optimize irrigation and fertilizer usage.2. Asset Tracking: LoRa's long-range capabilities make it an ideal solution for tracking and monitoring assets over large areas. Companies can utilize LoRa-enabled trackers to monitor the location and condition of valuable assets such as shipping containers, vehicles, and equipment, ensuring their safety and enabling efficient asset management.3. Smart Cities: LoRa plays a crucial role in building smart cities by enabling various smart applications. From smart parking and waste management systems to environmental monitoring and energy management, LoRa technology provides a reliable andcost-effective communication infrastructure required for these applications to operate seamlessly.4. Industrial Automation: With its low power consumption and long-range capabilities, LoRa technology offers significant advantages in industrial automation. It enables real-time monitoring of machines, predictive maintenance, and remote control, leading to improved efficiency, reduced downtime, and cost savings.Implementing LoRa in IoT ProjectsImplementing LoRa in an IoT project involves several key steps:1. Network Planning: Determine the coverage area and required number of LoRa gateways to provide sufficient coverage. Address potential interference sources and ensure optimal spacing betweengateways for reliable communication.2. Device Selection: Choose LoRa-enabled devices or sensors suitable for the application requirements. Consider factors such as power consumption, range, and data transfer rate when selecting devices.3. Gateway Deployment: Install LoRa gateways strategically to ensure adequate coverage. Factors such as terrain, building structures, and interference sources should be considered when placing gateways for optimal signal transmission.4. Network Configuration: Configure the LoRa network by ensuring gateways, devices, and sensors are properly registered and associated with their respective network servers. Set up secure network connections to protect data integrity.5. Application Development: Develop or integrate IoT applications to interface with the LoRa network server. This involves designing user interfaces, implementing data analytics, and integrating the collected data into existing systems or platforms.ConclusionLoRa technology offers stable diffusion for IoT applications, with its long-range capabilities, low power consumption, scalability, and cost-effectiveness. Its applications in smart agriculture, asset tracking, smart cities, and industrial automation are just a glimpse of the possibilities that LoRa technology presents. By following the steps involved in implementing LoRa, IoT projects can realize the full potential of this reliable and efficient communication protocol.。

Palo Alto Networks andArista NetworksNetwork-based security integration providing dynamic automated deploy-ment, deep visibility, and robust security for physical and virtual workloadsThe ChallengeData centers have increasingly virtualized and partitioned their networks, becoming more dynamic while accommo-dating on-the-fly deployment of new applications within shared private, public, and hybrid clouds. Furthermore, the threat landscape is changing. Hackers are finding new ways to breach the data center with an influx of new vulnerabil-ities and threats. Enterprises are faced with the c omplexity of i mplementing agile security architectures to address a h ybrid environment of microservices, virtual workloads, and legacy applications to protect critical assets from mod-ern threats. This includes securing traffic between modern application clusters and bare metal workloads. SecOps is challenged to maintain control over traffic and detect any compromised assets within the data center.Arista Networks Macro-Segmentation Service Arista Networks Macro-Segmentation Service® (MSS®) c apability for CloudVision® allows a variety of platforms, such as next-generation firewalls, to be deployed a utomatically for specific workloads and workflows across any network t opology, including Layer 2, Layer 3, and overlay network vir-tualization frameworks.MSS is a capability within Arista CloudVision that addresses a growing gap in security deployment for hybrid data centers. It extends the concept of fine-grained intra-hypervisor secu-rity for virtual machines (VMs) to the rest of the data center by enabling dynamic insertion of services for physical devices and non-virtualized devices. It is specifically aimed at phys-ical-to-physical and physical-to-virtual workloads, with complete flexibility on the placement of service devices and workloads.MSS components include:• Arista leaf-spine switch fabric• Arista CloudVision• Vendor firewall attached to a service leaf switch. Firewalls can be attached in high availability configuration (active-standby or active-active) as well.Palo Alto NetworksPalo Alto Networks Next-Generation Firewalls offer a preven-tion-focused architecture that is easy to deploy and operate. Automation reduces manual effort so your security teams can replace disconnected tools with tightly integrated innovations, focus on what matters, and enforce consistent protection e verywhere.Next-Generation Firewalls inspect all traffic, including all a pplications, threats, and content, and tie that traffic to the user, regardless of location or device type. The user, appli-cation, and content—the elements that run your business— become integral components of your enterprise security policy. As a result, you can align security with your business policies as well as write rules that are easy to understand and maintain. Palo Alto Networks and Arista MSSBy integrating with native APIs provided by Next-Generation Firewalls in the data center (PA-3200 Series, PA-5200 Series, and PA-7000 Series) and Palo Alto Networks Panorama™ net-work security management, MSS learns the security policies, identifies the workloads the firewall needs to inspect, and takes action. Upon identification, MSS can now steer relevant traffic to the firewall, inserting the firewall in the path of workload flows.The automation capabilities of Arista MSS operate in real time without any need for a network operator to engage the security administrator. Furthermore, there is no need for the network to be architected in a manner specific to a particular workload. This flexibility is crucial to the successful deploy-ment of security in an enterprise private or hybrid cloud. With this new integration, Next-Generation Firewalls can create security policies from a central point and implement them across the network.Benefits of the Integration• Dynamic service insertion• Complete flexibility on locality of devices• No new frame formats or protocols required• Network security integration driven by automationPalo Alto Networks | Arista Networks | Tech Partner Brief13000 Tannery Way Santa Clara, CA 95054Ma i n: +1.408.753.4000Sales: +1.866.320.4788Support: +1.866.898.9087 © 2020 Palo Alto Networks, Inc. Palo Alto Networks is a registered t rademark of Palo Alto Networks. A list of our trademarks can be found at https:///company/trademarks.html. All other marks mentioned herein may be trademarks of their respective companies. palo-alto-networks-and-arista-networks-tpb-051920Use Case No. 2: Complete Flexibility on S ecurity Device Location Next-Generation Firewalls can be connected anywhere in the network on any switch. This allows larger data centers to centralize their security devices in a service rack and logically insert them in the path between any workloads on demand or based on a firewall policy. There are no restrictions or limita -tions on where security devices are physically attached withinFigure 1: Palo Alto Networks and Arista Networks integration architecture Use Case No. 1: Intelligent Inspection of East-West Traffic on DemandArista’s MSS does not try to “own security policy” or need to run a controller-of-controllers that understands every a pplication flow or interaction. Customers can define secu -rity policies within Panorama.Using the API plane, Arista CloudVision obtains the relevant rules from Panorama and programs the Arista switches to steer intercepted east-west workload traffic to Next-Gen -eration Firewalls for robust traffic and content inspection as well as policy enforcement. Security administrators now have the flexibility to add or remove policies to monitor traffic between workloads on demand, and they can profile traffic to proactively detect malware or denial-of-serviceattacks from within the enterprise.the fabric. Palo Alto Networks firewalls are discovered via Link Layer Discovery Protocol (LLDP). Likewise, devices to which services are targeted can be located anywhere in the network with no restrictions or limitations on physical e Case No. 3: Offload Traffic Inspection with Intelligent Security Policies In addition to redirecting traffic to the firewall, security admin -istrators can define rules within Panorama to offload predict -able traffic from the firewall. Arista MSS enforces these poli -cies on the switches. In a legacy architecture, all traffic would be steered to the firewall for processing, consuming bandwidth and CPU resources. This offloading function enables the fire -wall to provide high-performance deep packet inspection and intrusion prevention services for unknown traffic, reducing the risk of malware or threats gaining footholds.About AristaArista Networks pioneered software-driven, cognitive cloud networking for large-scale datacenter and campus environ -ments. Arista’s award-winning platforms, ranging in Ethernet speeds from 10 to 400 gigabits per second, redefine scalability, agility and resilience. Arista has shipped more than 20 million cloud networking ports worldwide with CloudVision and EOS, an advanced network operating system. Committed to open standards, Arista is a founding member of the 25/50G consor -tium. Arista Networks products are available worldwide direct-ly and through partners. Find out more at .About Palo Alto NetworksPalo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate. Our mission is to be the cybersecurity partner of choice, protecting our digital way of life. We help address the world’s greatest security challenges with continuous innovation that seizes the latest breakthroughs in artificial intelligence, analytics, automation, and orches -tration. By delivering an integrated platform and empower -ing a growing ecosystem of partners, we are at the forefront of p rotecting tens of thousands of organizations across clouds, networks, and mobile devices. Our vision is a world where each day is safer and more secure than the one before. For more information, visit .。

阿科桑底——试问如果,建筑、生物与城市设计
杰夫·斯坦因;尚晋
【期刊名称】《世界建筑》
【年(卷),期】2017(000)004
【总页数】6页(P30-35)
【作者】杰夫·斯坦因;尚晋
【作者单位】亚利桑那州科桑底基金会
【正文语种】中文
【相关文献】
1.桑泰尼科自主品牌的光荣与梦想——桑泰尼科自主研发印后自动化设备之路 [J],
2.阿科桑底的风铃 [J], 周榕
3.重新想象建筑,倾斜现实评BAU建筑与城市设计事务所的建筑与城市设计 [J],
阿曼达·阿克曼迪;方群
4.绿色建筑——可持续发展之路——基于生物气候条件的绿色城市设计生态策略[J], 王建国;徐小东
5.未来生态城市的样本——阿科桑底 [J], 郭爽
因版权原因，仅展示原文概要，查看原文内容请购买。

没有搜索的搜索——专访Google首席搜索工程师阿米特辛
格哈尔
张娅
【期刊名称】《商务周刊》
【年(卷),期】2010(000)013
【摘要】试想一下这样的场景：你身处一个陌生城市，街边的建筑吸引了你的注意，你认为它非常特别，但身边既没有导游，也没有携带旅游手册。

你用手机摄像头拍下这个建筑，上传到Google。

Google会扫描这个图像，确定它是什么，并把搜索结果发送给你。

参观完建筑，你决定美餐一顿。

再次打开手机，无需输入，通过GPS或手机发射塔，你就可以在Google的搜索框下看到一个蓝色小气泡和你所在的位置。

【总页数】2页(P90-91)
【作者】张娅
【作者单位】不详
【正文语种】中文
【中图分类】TP393.092
【相关文献】
1.Google学术搜索——科学引文搜索的利器 [J], 王兴华
2.专访Google图像搜索创始工程师 [J], 闫辉
3.桌面搜索软件超级试用 Google桌面搜索中文版和百度硬盘搜索 [J], 肖树平
4.搜索引擎google与百度研究与新兴搜索引擎改进 [J], 赵捷
5.你也能用GOOGLE成为搜索专家活用Google搜索密技 MP3、软件、图片、序列号……,搜个够!之一 [J], 大有
因版权原因，仅展示原文概要，查看原文内容请购买。

李星老师素材库
星清华本科，然后出国留学，1991年博士学成回国，任教于清华。

自1994年，李星和吴建平搭档，担任中国教育和科研计算机网CERNET的主要技术负责人，真正全程参与整个中国互联网的发展历程。

现任CERNET副主任，赛尔网络副总经理，首席技术官。

江湖地位仅次于吴建平。

李星是中国大陆首个非中文相关标准RFC4925的第一作者。

是7个RFC的作者，其数量在中国大陆作者中名列第一。

李星曾是IAB国内第一个理事、亚太网络工作组(APNG)主席、亚太网络信息中心（APNIC）理事会委员。

是国内长期深度参与国际网络治理，而且迄今活跃在第一线的屈指可数的关键人物。

李星老师为人平和、低调，与我们熟知的吴建平老师风格迥异。

除了学界，知道他的人不算多。

但是，李老师参与国际网络治理的历程和深度，可以说在大陆人中，不说第一，也是第二。

目前，国内入选国际互联网协会（ISOC）名人堂的，先后有胡启恒、钱华林和吴建平，那么第四个将是谁呢？我个人认为，无论论资历还是论贡献，第四个人非李星莫属！我们期待着。

DCWTechnology Analysis技术分析89数字通信世界2023.071 网络时延及URLLC关键技术概述1.1 网络时延5G 网络端到端传输时延包括单向时延和双向时延两种。

其中，单向时延指信息从发送方发出后传输至接收方所需要的时间，业务端至端时延便属于这种情况；双向时延指信息从发送方发出并到达接收方后，接收方再发送信息给发送方所需要的全部时间。

国际电联无线电通信部门的I M T —2020将UR LLC 业务时延定义为用户面时延，即指终端发送用户数据对应的时间延迟[1]。

与这一概念相对应的是控制面时延，即手机注册网络或状态转换对应的信令流程耗时。

5G 端到端传输时延具体见图1。

PDCP 层和终端PDCP 层间传输数据所需要的时间，其值与资源调度、混合重传、基站及终端处理时间等有关。

而基站和终端的处理时间主要受数据分组、设备处理能力等的影响，通过优化传输分组、编码及改善芯片处理能力，能大幅降低相应时延。

1.2 URLLC关键技术概述5G 三大典型应用场景中的UR LLC 应用场景要求空口时延应在1 ms 以内，可靠性在99.999%以上。

网络制式和子载波间隔是影响5G 网络业务时延的主要方面。

就网络制式方面来看，5G 技术对FDD 和TDD 等方式均较为支持，其中FDD 方式所承受的上下行转换时隙的影响程度微乎其微，比TDD 方式低时延的性能优势更加明显。

而从子载波间隔的角度看，5G 网络在FR1频段可支持15 kHz 、30 kHz 、60 kHz 等业务信道对应的子载波间隔，但是在FR2频段则只支持 60 kHz 、120 kHz 两种业务信道子载波间隔，网络低时延优势也更为凸显。

为切实降低U R LLC 应用场景中5G 网络时延，设计者提出多种对上下行链路均适用的思路，包括5G URLLC应用场景中低时延、高可靠关键技术分析梁 建（山西信息规划设计院有限公司，山西 太原 030012）摘要：文章在概述5G网络端到端传输时延类型及URLLC业务时延要求的基础上，对传输网URLLC关键技术和核心网URLLC关键技术展开分析，面向不同的URLLC业务应用场景，制定不同的技术组合方案，以优化5G URLLC网络应用，为运营商降低5G网络时延和提高可靠性提供技术参考。

0 引言港口在每个国家的经济发展中都起着着十分重要的作用，作为海陆联运的关键所在，港口对国际间的贸易起着至关重要的作用[1-3]。

目前，散货港口中常用的装卸机械主要有桥式抓斗卸船机、斗轮堆取料机、装船机等，装卸机械的作业效率将影响整个港口的工作效率[4，5]，故追求其高作业效率将极大提高港口的综合竞争力[6]。

为了提高工作效率、改善作业条件、降低人工成本，实现抓取的自动化已成为新的发展方向[7-9]，而散货料堆的三维重建及参数信息的获取则是抓取自动化过程中必不可少的一环[10-12]。

本文针对港口散货料堆的三维重建及测量技术进行研究，设计了三维料堆扫描系统，该系统以激光雷达与旋转云台搭建的实验平台为基础，结合多传感器融合技术和点云处理技术对获取散货料堆的二维点云数据进行处理实现料堆三维重建，并对散货料堆的三维点云数据进行测算以获取最高点、占地面积等信息，为抓取的自动化奠定基础。

1 三维料堆扫描系统总体设计三维料堆扫描系统主要包括点云获取硬件平台和点云处理软件系统2部分，点云获取硬件平台主要是获取料堆的点云数据，以实现后续的三维重建及料堆信息的测算；点云处理软件系统主要是对获取的点云数据进行一系列处理，达到所需结果，系统中总体的设计框架图如图1所示。

*基金项目：河南省科技研发计划联合基金项目（225101610079）、湖北省重点研发专项（2023BEB046）基于激光扫描的散货料堆实时三维重建与参数提取*曹小华1 侯文晟2 韩红安2 武 超21武汉理工大学交通与物流工程学院 武汉 430063 2河南卫华重型机械股份有限公司 新乡 453499摘 要：文中针对港口散货料堆三维重建与参数获取问题，对自动化抓取中散货料堆的三维重建方式和料堆参数测算方法进行了研究。

首先对港口散货料堆的作业方式和作业环境进行分析，设计并搭建了三维重建实验平台，然后对点云数据进行旋转变换，利用点云拼接技术实现从二维点云到三维点云的转换，最后通过求取极值并利用极值索引来获取最高点的坐标，通过AABB 包围盒获取料堆的长宽高等数据，以此计算出散货料堆的占地面积。

基于ERA5再分析资料的冬季南海北部低云日变化研究姚海兰1，龙景超1,2,3*，谢丹惠1，何维帅1，李钟锐1，薛宇峰1,2,3 1.广东海洋大学海洋与气象学院/南海海洋气象研究院，广东湛江 524088；2.中国气象局广东海洋大学气象联合实验室，广东湛江 524088；3.广东省高等学校陆架及深远海气候、资源与环境重点实验室，广东湛江 524088摘要 低云对区域辐射能量平衡和天气、气候具有重要意义。

利用ERA5再分析数据和香港探空站资料研究了冬季南海北部低云日变化机理。

主要结论如下：（1）南海低云量呈现西北多东南少、夜多昼少，低云高度呈夜高昼低，低云厚度呈夜厚昼薄的特征。

（2）冬季南海北部低层大气稳定性强，海气界面稳定性弱，云层下方边界层混合均匀，有利于低云形成。

（3）夜间，陆风环流系统改变海洋风场和湿度场的分配，异常南风使近海水汽辐合抬升，为云层发展提供水汽。

（4）夜间逆温层强度虽弱但发生频率更高，且云底以下边界层退耦减弱，边界层混合加强，云顶短波辐射加热作用消失，促使低云的产生。

这都将有利于提高人们对南海低云日变化的理解和数值模拟能力。

关键词 低云；南海北部；日变化；海陆风环流中图分类号：P732 文献标识码：B 文章编号：2095–3305(2023)07–0144-04云的覆盖面积达到地球面积的2/3左右，在调节地气系统的辐射收支、能量平衡、热量交换、水汽循环等方面起到重要作用[1-4]。

其中，低云温度较高，削弱太阳辐射的能力最强，其通过吸收短波辐射、散射长波辐射对地气系统具有冷却作用。

低云量每增加4%，气温可降低2~3 K，几乎可以抵消倍增的温室效应。

难以预测和估计低云量的变化，因此研究低云的分布特点、日变化特征，以及探讨低云变化的机理等具有重大意义。

南海作为我国和西北太平洋最大的陆架边缘海，并且是我国重要的战略海区，因而深入研究南海低云的日变化特征及机理具有重要的意义。

针对低云日变化特征和形成机制，前人开展了大量研究。

第44卷第1期航天返回与遥感2023年2月SPACECRAFT RECOVERY & REMOTE SENSING93低轨大型遥感星座发展现状及其关键技术柯知非黄石生李玉良乔凯滕飞阮航王晓婷魏楚奇马星亮（北京跟踪与通信技术研究所，北京100094）摘要近年来，低轨大型遥感星座计划发展迅速，高频次、低成本、弹性高的大型低轨遥感星座系统成为了各国争相发展的技术。

文章概述了Flock、Capella、BlackSky Global、Lemur-2、NewSat等低轨大型遥感星座的发展现状，以及中国大型遥感星座的基本情况；在此基础上，分别从遥感星座涉及的通信网络、自主协同、星座部署、星座管控、信息处理等5个方面，就低轨大型遥感星座涉及到的多载荷任务协同、星上自主任务规划、快速响应调度、星箭一体化设计、卫星星座构型设计、星座智能管控、遥感图像数据融合、星座数据处理等关键技术进行了总结分析，并对未来的发展趋势进行了阐述。

关键词低轨星座遥感卫星星间通信卫星任务规划星座部署卫星信息处理中图分类号: P151文献标志码: A 文章编号: 1009-8518(2023)01-0093-09DOI: 10.3969/j.issn.1009-8518.2023.01.010Research on the Development Status and Key Technologies of LargeLEO Remote Sensing ConstellationsKE Zhifei HUANG Shisheng LI Yuliang QIAO Kai TENG Fei RUAN Hang WANG XiaotingWEI Chuqi MA Xingliang（Beijing Tracking and Communication technology Institute, Beijing 100094, China）Abstract In recent years, the large LEO remote sensing constellation project has developed rapidly. With high frequency, low cost and high flexibility, the large LEO remote sensing constellation system has become a technology that countries are competing to develop. Firstly, the development status of LEO large remote sensing constellations such as Flock, Capella, Blacksky Global, Lemur-2, Newsat and the basic overview of China's large remote sensing constellations are summarized. On this basis, from the five aspects of communication network, remote sensing monitoring, constellation deployment in management and control, and information processing involved in the remote sensing constellation, the technologies involved in the LEO large-scale remote sensing constellation, such as multi payload task coordination, on-board autonomous task planning, rapid response scheduling, satellite rocket integration design, satellite constellation configuration design, constellation intelligent management and control, remote sensing image data fusion, constellation data processing, are summarized and studied, and its research direction is described.Keywords LEO constellation; remote sensing satellite; intersatellite communication; satellite scheduling; constellation deployment; information processing on satellite收稿日期：2022-08-24基金项目：高分辨率对地观测系统重大专项（GFZX040412）引用格式：柯知非, 黄石生, 李玉良, 等. 低轨大型遥感星座发展现状及其关键技术[J]. 航天返回与遥感, 2023, 44(1): 93-101.KE Zhifei, HUANG Shisheng, LI Yuliang, et al. Research on the Development Status and Key Technologies of Large94航天返回与遥感2023年第44卷0 引言当前遥感技术为国土、应急、减灾、环保、水利、农业、气象等多个领域提供了重要应用，世界各国各行业对航天遥感应用的需求日益增加，推动了商业遥感卫星应用的不断发展。

输电线路杆塔空气间隙三维可视化管理系统许焱1，郭宁1，张辉1，苗堃1，李超1，刘亚文2*（1.国网河南省电力公司济源供电公司，河南济源459000；2.武汉大学遥感信息工程学院，湖北武汉430079）摘要：在Web GIS 框架下构建了真三维场景的防风偏参数杆塔空气间隙管理系统，提出了兼顾数据量和表现力的无人机摄影测量输电线路建模方案，保证了三维场景的精细度与可量测性，并设计了合理的系统多源数据组织方式及数据浏览、查询、分析等功能。

实践表明，该系统能够实现在真实三维场景下，对杆塔空气间隙的查看、浏览与分析，为输电线路防风偏提供有效的分析平台。

关键词：杆塔空气间隙；可视化管理系统；输电线路点云模型中图分类号：P208文献标志码：B文章编号：1672-4623（2022）04-0163-05doi:10.3969/j.issn.1672-4623.2022.04.035Transmission Line Tower-line Air Gap Management SystemBased on 3D Visualization SceneXU Yan 1,GUO Ning 1,ZHANG Hui 1,MIAO Kun 1,LI Chao 1,LIU Yawen 2(1.State Grid Henan Jiyuan Electric Power Supply Company,Jiyuan 459000,China;2.School of Remote Sensingand Information Engineering,Wuhan University,Wuhan 430079,China)Abstract:The tower-line air gap management system with real 3D scene based on Web GIS was constructed.This paper presented a transmis-sion line modeling scheme on UA V photogrammetry that ensures 3D scene precision and measurability.A reasonable multi-source data organiza-tion and data browsing,query and analysis functions were designed for this management system.The practice shows that this management sys-tem can achieve tower-line air gap query,browse and analysis in real 3D scene,and provide a reliable analysis platform for transmission line windage yaw prevention.Key words:tower-line air gap,management system on 3D visualization scene,transmission line point model随着通信技术、网络技术的广泛应用，结合Web GIS 和虚拟建模技术的输电线路管理系统成为主流，如文献[1]将三维仿真场景同日常输电线路管理结合起来，实现电网企业智能化的运行和管理。

应用亚司艾楼控系统(ASI Controls)获得美国绿色建筑认证邵朝嘉
【期刊名称】《智能建筑与城市信息》
【年(卷),期】2007(000)006
【摘要】发展绿色建筑,推动节能降耗是国家建设节约型和环境友好型社会的既定政策.本文藉美国对绿色建筑的认证作为我国发展绿色建筑,推广和应用绿色建筑的借镜.并阐述了建筑智能化对绿色建筑的贡献.
【总页数】3页(P35-37)
【作者】邵朝嘉
【作者单位】美国亚司艾自控
【正文语种】中文
【相关文献】
1.美国LEED绿色建筑认证系统在某项目中的应用分析 [J], 杨怡红;邹钺
2.艾顿(Alerton)楼控系统 [J],
3.艾讯科技获得ISO 14001环境管理系统标准认证积极展现重视环保之义务及责任 [J], 无
4.艾讯科技获得IS014001环境管理系统标准认证 [J],
5.四川省绿色建筑评价标识工作委员会办公室关于温江恒大御景(1-6号楼、8-11号楼)等五个项目获得绿色建筑设计评价标识的通告 [J],
因版权原因，仅展示原文概要，查看原文内容请购买。

谷歌与云智慧——让令人难以置信的计算力量掌控更广阔的
世界
张振成
【期刊名称】《网络传播》
【年(卷),期】2008(000)003
【摘要】27岁的Christophe Bisciglia 是谷歌的高级软件工程师。

对那些信心十足来谷歌求职的大学生，他每次都问同样的一个简单问题，以判断他们是否有谷歌人的思维方式。

“告诉我，如果面对的数据是现在的一千倍，你怎么办？”多么奇怪的问题。

【总页数】3页(P84-86)
【作者】张振成
【作者单位】无
【正文语种】中文
【中图分类】B848.5
【相关文献】
1.全球化时代掌控世界经济的三支重要力量 [J], 吴海民;蔡赛男
2.智慧云亭：让城市更智慧 [J], 黎林峰;
3.充满智慧的云端需要利于掌控的终端以华为MediaPad为基点畅谈平板电脑与云计算 [J],
4.2017年世界标准日祝辞标准让城市更智慧：以标准化助力质量提升——纪念世
界标准日 [J], 詹姆斯·香农[1];张晓刚[2];赵厚麟[3];邓凤琴[1]
5.为建设更公平更健康的世界贡献智慧力量 [J], 龙跃梅
因版权原因，仅展示原文概要，查看原文内容请购买。

Meraki MS Series SwitchesCisco Meraki offers a broad range of switches, built from the ground up to be easy to manage without compromising any of the power and flexibility traditionally found in traditional enterprise-class switches.Meraki access & aggregation switches are all managed through an elegant, intuitive cloud interface, freeing administrators to spend less time on configuration and more time on meeting business needs.To set up a Meraki switch, just plug it in; there’s no need for repetitive, command-based configuration, and switches can be up and running within minutes of connecting them to the network. A powerful centralized management interface gives administrators deep visibility into the network and how it is used:• Receive automatic email alerts for power loss, downtime, excessive Layer 1 errors, or configuration changes• Utilize remote diagnostic tools such as packet capture to help isolate and troubleshoot network issues• Stay protected with firmware upgrades andenhancements from the Meraki cloudThe Meraki dashboard provides unified policies, event logs, and monitoring, making it easy to manage network deployments without sacrificing functionality.OverviewFAMILY DATASHEET PRODUCT FAMILY HIGHLIGHTS• Basic L2 to high-performance L3 switches with 1G/10G/40G uplinks, suitable for deployments of all sizes• Range of enterprise switching options built on proven Cisco hardware technologies• Integrated troubleshooting tools, logging, and alerting reduce operational costs• True zero-touch configuration model that scales with organization needs and requirements • Cloud management reduces cost, overhead and time to resolution• Industry-standard features allow for simple integration into existing and mixed infrastructures• Role-based administration and automatic, secure firmware updates delivered via the web• Energy efficient design with low acoustics and fanless optionsInside the Meraki MSMERAKI MS350-48FP SHOWN, VARIES BY MODELVariable Speed FansStacking connectors High Reliability / MTBFExtended Life Components802.3af/802.3at PoE/PoE+Enhanced CPU / Memory Meraki Cloud Management Built-in 4 × 10 GbE SFP+ Uplink Ports for Uplink ConnectivityENTERPRISE-CLASS HARDWAREMeraki switches feature high-end hardware and an exceptional feature set, including:• 1G, 10G and 40G uplink ports for high-speed connectivity to aggregation layer switches or other upstream devices• Multigigabit ports (MS350-24X and MS355 Series) provide up to 10Gbps on a single Ethernet cable, supporting the latest WiFi performance capabilities• Wire-speed, non-blocking switch fabric (up to 800 Gbps) and 6 dedicated QoS queues for high-performance, converged voice, video, and data deployments• Power efficient, quiet acoustic designs, and shallow rack depth options, enabling flexible deployment in wiring closets as well as offices and classrooms• Fanless design on select models• Power over Ethernet and PoE+, up to 30W per port• Up to 740 watt PoE budget with PoE+ support for powering APs, cameras, and other PoE enabled devices (124W for 120-8 series), with UPoE available on the MS350-24X and MS355 series • Lifetime hardware warranty and advanced replacement at no additional cost• Field-replaceable, hot-swappable power supplies and fans on select models. RPS option for mission-critical applicationsMeraki switches include all of the traditional Ethernet features found on the highest end products, including:• Quality-of-Service (QoS) to prioritize mission critical traffic such as voice and video• IEEE 802.1X support for port based network access control • MAC-based RADIUS auth and MAC whitelisting • Voice VLAN support for simplified VoIP deployments• Port Mirroring support for monitoring network traffic at line rate • DHCP snooping to prevent users from adding unauthorized DHCP servers on the network• IGMP Snooping to optimize network performance with multicast traffic• Link Aggregation Control Protocol (LACP) for high-capacity trunking, stacking, and increased availability• Rapid spanning tree, BPDU guard, root guard, UDLD, and other safeguards to help prevent misconfigurations and reduce convergence time• Per port VLAN configuration• Multiple administrative roles with sophisticated security policy management• High-performance layer 3 routing capabilities on select modelsPOWERFUL FEATURE SET FOR DEPLOYMENTS OF ALL TYPESSeries MS120-8MS120MS210MS225Deployment type Compact Small branch & office Branch &Small campus Branch & Small campusInterfaces8 x 1G RJ4524 / 48 x 1G RJ4524 / 48 x 1G RJ45 ports24 / 48 x 1G RJ45 ports Uplinks 2 x 1G SFP 4 x 1G SFP 4 x 1G SFP ports 4 x 10G SFP+ portsPoE capabilities67W (LP model)124W (FP model)370W (P, LP models)740W (FP model)370W (P, LP models)740W (FP models)370W (P, LP models)740W (FP models)Power configuration External PSU (non-PoE, LP model)Internal PSU (FP Model)Internal InternalOptional RPSInternalOptional RPSStacking capabilities Virtual only Virtual only Stacks with MS22580 Gbps physical +virtualStacks with MS21080 Gbps physical +virtualRouting capabilities DHCP Relay DHCP Relay Static onlyDHCP RelayStatic onlyDHCP RelayModels MS120-8-HWMS120-8LP-HWMS120-8FP-HW MS120-24-HWMS120-24P-HWMS120-48-HWMS120-48LP-HWMS120-48FP-HWMS210-24-HWMS210-24P-HWMS210-48-HWMS210-48LP-HWMS210-48FP-HWMS225-24-HWMS225-24P-HWMS225-48-HWMS225-48LP-HWMS225-48FP-HWSeriesMS250MS350MS355 X Series MS355 X2 SeriesDeployment type Branch & CampusCampus & MultigigabitCampus & Multigigabit High-Density Multigigabit Interfaces24 / 48 x 1G RJ45 ports24 / 48 x 1G RJ451 ports(24X model)16 x 1G RJ451 ports 8 x mGig ports (24X model)16 x 1G RJ451 ports 8 x mGig ports (48X model)32 x 1G RJ451 ports 16 x mGig ports(24X2 model)24 x mGig ports(48X2 model)24 x 1G RJ451 ports 24 x mGig portsUplinks 4 x 10G SFP+ ports 4 x 10G SFP+ ports 4 x 10G SFP+ or 2 x 40G QSFP+4 x 10G SFP+ or 2 x 40G QSFP+PoEcapabilities 370W (P, LP models)740W (FP models)370W (P, LP models)740W (FP, 24X models)740W740WPowerconfiguration ModularRedundant PSU optional ModularRedundant PSU optional ModularRedundant PSU optional ModularRedundant PSU optional Stacking capabilities 80 Gbps physical + virtual160 Gbps physical + virtual400 Gbps physical + virtual400 Gbps physical + virtualRouting capabilitiesStatic + Dynamic 2DHCP Server + Relay Warm spare (VRRP)Static + Dynamic 2DHCP Server + Relay Warm spare (VRRP)Static + Dynamic 2DHCP Server + Relay Warm spare (VRRP)Static + Dynamic 2DHCP Server + Relay Warm spare (VRRP)ModelsMS250-24-HW MS250-24P-HW MS250-48-HW MS250-48LP-HW MS250-48FP-HW MS350-24-HW MS350-24P-HW MS350-48-HW MS350-48LP-HW MS350-48FP-HWMS355-24X-HW MS355-48X-HW MS355-24X2-HW MS355-48X2-HW1Interfaces do not support half-duplex on the MS3502Detailed routing specifications are available in series datasheetsSeriesMS410MS425Deployment type 1G fiber aggregation 10G fiber aggregationInterfaces 16 / 32 x 1G SFP 16 / 32 x 10G SFP+Uplinks2 x 10G SFP+ (MS410-16)4 x 10G SFP+ (MS410-32)2 x 40G QSFP+Powerconfiguration ModularRedundant PSU optional (sold separately)ModularRedundant PSU optional (sold separately)Stacking capabilities 160G physical + virtualFront-port 160G + virtualRouting capabilitiesStatic + Dynamic DHCP Server + Relay Warm spare (VRRP)Static + Dynamic DHCP Server + Relay Warm spare (VRRP)ModelsMS410-16-HW MS410-32-HW MS425-16-HW MS425-32-HWMeraki Aggregation Switching PortfolioAll Cisco Meraki MS switches include a limited lifetime hardware warranty that provides next-day advance hardware replacement. Meraki’s simplified software and support licensing model also combines all software upgrades, centralized systems management, and phone support under a single, easy-to-understand model. For complete details, please visit /support .Lifetime Warranty with Next Day Advance ReplacementINTELLIGENT CAMPUS & BRANCH SWITCHINGWith built-in monitoring, troubleshooting and logging capabilities, Meraki switches provide a refreshing newapproach to managing network infrastructure, regardless of deployment size.Meraki’s Virtual Stacking technology eliminates the need for configuration scripts and commands, empowering administrators to make changes quickly and securely on one or all the switches in a deployment at once.WIRED SECURITY WITHOUT COMPROMISEWhether deployed in an office environment, hospital or retail store, Meraki switches make enforcing securitypolicies a breeze. Set up multiple policies and enable them at the port-level, or apply them across the entire network in a few clicks.Meraki switches also provide comprehensive security reporting, making it easy to proactively discover rogue DHCP servers and other malicious activity on the network.TROUBLESHOOTING, THE WAY IT SHOULD BEDrastically reduce time-to-resolution with a variety ofpowerful troubleshooting tools such as remote cable testing and packet captures that help isolate and troubleshoot network issues.With Meraki’s dynamic network topology, see how the entire network is interconnected, automatically.Ensure the entire team receives alerts upon power loss, downtime, or configuration changes.Meraki switches include all of the traditional Ethernet features found in modern enterprise access switches, including:Remote cable test in the Meraki DashboardFeatures and CapabilitiesMeraki’s cloud management architecture delivers true zero-touch switch provisioning – configure switches before theyarrive onsite, or use Meraki templates to standardize anentire fleet of switches, no matter what size.With Virtual Stacking, IT admins can make configurationchanges to hundreds of switch ports in seconds withour intuitive dashboard interface, enabling rapid andstreamlined switch port management that would otherwisetake weeks to complete.BUILT-IN APPLICATION LAYER VISIBILITY Array Meraki switches include integrated Layer 7 visibility, to helpIT admins identify hundreds of applications, from businessapps to BitTorrent and Y ouTube.User fingerprinting with Google-like search allowsadministrators to easily identify and control individual users,PCs, iMacs, iPads, Androids, and other devices.This unprecedented visibility allows optimizing of networkresources and maintaining optimal network performance. ArrayBEYOND-THE-NETWORK SOFTWAREARCHITECTUREMeraki switches run the same operating system used by allof our products, which allows us to deliver a consistent userexperience for network management.When connected, new Meraki switches automatically reachout to the Meraki cloud and download the most currentconfiguration. Future updates can be user-scheduled,ensuring the network is kept up-to-date with bug fixes,security updates, and new features.Meraki Cloud Management Architecture with All ProductsIncluded In the BoxMS120-8 Series Integrated mounting brackets, External PSU (non-PoE and LP models), Mounting screw kit, Getting started insertMS120 Series Mounting screw kit, Getting started insertMS210 Series Mounting screw kit, Getting started insertMS225 Series Mounting screw kit, Getting started insertMS250 Series Power Supply (1), System fans (2), Mounting screw kit, Getting started insertMS350 Series Stacking cable (1), Power Supply (1), system fans (2), Mounting screw kit, Getting started insertMS355 Series Power Supply (1), 4-post rack mount kit, Pre-Installed Fans (3)MS410 Series Power Supply (1), System fans (2), Mounting screw kit, Getting started insertMS425 Series Power Supply (1), System fans (3), Mounting screw kit, Getting started insertOptional AccessoriesMeraki MS switches support SFP/SFP+/QSFP+/QSFP28 optic accessories for high-speed connectivity. Meraki offers a variety of 1G, 10G, 40G, 100G accessories. Full specifications and compatibility information is available in the Meraki Accessories datasheet: https:///lib/pdf/ meraki_datasheet_sfp.pdfAdditional ResourcesMeraki MS120-8 Compact Series Datasheethttps:///lib/pdf/meraki_datasheet_ms120_compact.pdf Meraki MS120 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms120.pdfMeraki MS210 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms210.pdfMeraki MS225 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms225.pdfMeraki MS250 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms250.pdfMeraki MS350 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms350.pdfMeraki MS355 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms355.pdfMeraki MS410 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms410.pdfMeraki MS425 Series Datasheethttps:///lib/pdf/meraki_datasheet_ms425.pdfMeraki SFP & Stacking Accessories Datasheet/lib/pdf/meraki_datasheet_sfp.pdfCost Calculatorhttps:///buy/cost-calculator。