Regenerative Energy Utilization in China’s Urban Railway

我想象未来的船只英语作文The maritime industry stands at the precipice of a transformative era, where advancements in technology and a heightened awareness of environmental sustainability are reshaping the design and capabilities of future vessels. As we venture into uncharted waters, let us envision the remarkable vessels that will redefine the maritime landscape.Hydrofoils and catamarans will become increasingly prevalent, their sleek hulls skimming effortlessly over the waves. These vessels harness the principles of hydrodynamics, utilizing submerged foils or twin hulls to reduce drag and increase speed. Their enhanced stability and maneuverability will enable them to navigate choppy waters and narrow channels with ease, making them ideal for high-speed passenger ferries, coastal patrol boats, and offshore wind farm support vessels.Electric and hybrid propulsion systems will play apivotal role in decarbonizing the maritime sector. Battery-powered vessels will silently glide through the water, leaving no emissions in their wake. Hybrid systems, combining traditional diesel engines with electric motors, will provide greater flexibility and efficiency, reducing fuel consumption and emissions while maintaining extended cruising ranges. Moreover, the integration of regenerative braking systems will capture energy during deceleration, further enhancing sustainability.Artificial intelligence (AI) will revolutionize ship operations, enhancing safety and efficiency. AI-powered navigation systems will utilize advanced sensors and real-time data to optimize routes, avoid hazards, and improve situational awareness. Predictive maintenance algorithmswill monitor vessel systems, identifying potential issues before they escalate, minimizing downtime and maximizing operational efficiency. AI-driven cargo management systems will streamline loading and unloading processes, ensuring optimal space utilization and reducing turnaround times.Autonomous vessels, equipped with sophisticated sensors,AI-powered decision-making systems, and remote monitoring capabilities, will emerge as game-changers in the industry. These vessels will operate with minimal human intervention, performing routine tasks such as navigation, collision avoidance, and cargo handling. Their ability to operate24/7, coupled with reduced crew costs and enhanced safety, will revolutionize long-distance shipping, cargo transportation, and offshore operations.Sustainability will be at the forefront of future ship design. Biodegradable materials, recycled components, and energy-efficient systems will minimize environmental impact. Vessels will be equipped with advanced waste management systems, reducing plastic pollution and preserving marine ecosystems. Solar panels and wind turbines will supplement power generation, further reducing reliance on fossil fuels.In addition to these technological advancements, future vessels will incorporate innovative designs to enhance user experience and functionality. Multi-purpose vessels,capable of adapting to various roles, will become more common. Modular construction techniques will allow forrapid customization and reconfiguration, catering to specific mission requirements. Vessels will incorporate advanced communication and entertainment systems, providing passengers and crew with enhanced connectivity and entertainment options.As we look to the horizon, it is evident that thefuture of ships is one of innovation, sustainability, and efficiency. Hydrofoils, electric propulsion, AI, autonomous operation, and sustainable designs will reshape the maritime industry, creating a cleaner, safer, and more efficient maritime ecosystem. These extraordinary vessels will not only transport goods and people but also serve as platforms for scientific research, exploration, and adventure, pushing the boundaries of human ingenuity and our connection to the oceans.。

2021年（第43卷）第2期汽车工程Automotive Engineering2021（Vol.43）No.2基于电机最优回馈转矩曲线的制动控制策略*曾小华1，陈虹旭1，宋大凤1，崔臣1，李占江2，蒋元广2（1.吉林大学，汽车仿真与控制国家重点实验室，长春130022；2.南京越博动力系统股份有限公司，南京210000）［摘要］本文中首先基于电机等效电路模型，分析了车用内置式永磁同步电机的耗能制动状态和回馈制动状态；然后根据电机矢量控制原理，对控制电流指令进行解析，并经试验数据的验证；接着计算得到永磁同步电机最优回馈转矩曲线，并据此提出一种制动回馈能量最优的串联制动控制策略。

最后针对某P4并联混合动力商用车，仿真分析了在C‑WTVC、CHTC‑TT循环工况和试验采集到的某段省道工况下，并联制动和所提出的串联最优制动控制策略下的百公里油耗和制动回收能量。

结果表明，与并联制动控制相比，基于电机最优回馈转矩曲线的串联制动控制策略可降低油耗，并回收更多的制动能量，实现制动回收能量和燃油经济性的提升。

关键词：再生制动；永磁同步电机；最优回馈转矩曲线；P4混合动力车Braking Control Strategy Based on Optimal RegenerativeBraking Torque Curve of MotorZeng Xiaohua1，Chen Hongxu1，Song Dafeng1，Cui Chen1，Li Zhanjiang2&Jiang Yuanguang1.Jilin University，State Key Laboratory of Automotive Simulation and Control，Changchun130022；2.Nanjing YueBoo Power System Co.，Ltd.，Nanjing210000［Abstract］In this paper，the energy‑consuming braking state and the regenerative braking state of a built‑in PMSM are analyzed first based on the equivalent circuit model of the motor.Then the control current instruction of the motor is analytically analyzed according to the principle of motor vector control and is verified by test data. Next，the optimal regenerative torque curve of PMSM is calculated，and based on which an optimal series braking control strategy for regenerative braking is proposed.Finally，a simulation is conducted to acquire the L/100km fuel consumption and the energy recovered by regenerative braking of a P4parallel hybrid electric commercial vehicle under C‑WTVC，CHTC‑TT and a section driving cycle of provincial road with both the parallel braking control and the optimal series braking control strategy.The results show that compared with parallel braking control，the series braking control strategy based on the optimal regenerative torque curve of the motor can reduce fuel consumption and recover more braking energy，achieving the enhancement of braking energy recovery and fuel economy.Keywords：regenerative braking；permanent magnet synchronous motor；optimal regenerative torque curve；P4hybrid electric vehicle前言面对日益严峻的环境和能源问题，汽车产业正经历由传统汽车向新能源汽车的转变。

杨帆，霍志伟，朱雯，等. 超高压辅助胶束法提取落叶松中二氢槲皮素的工艺优化[J]. 食品工业科技，2023，44（23）：175−183. doi:10.13386/j.issn1002-0306.2023020026YANG Fan, HUO Zhiwei, ZHU Wen, et al. Optimization of Ultrahigh Pressure Assisted Micellar Extraction of Taxifolin from Larch[J]. Science and Technology of Food Industry, 2023, 44(23): 175−183. (in Chinese with English abstract). doi:10.13386/j.issn1002-0306.2023020026· 工艺技术 ·超高压辅助胶束法提取落叶松中二氢槲皮素的工艺优化杨　帆，霍志伟，朱　雯，赵修华*（东北林业大学化学化工与资源利用学院，黑龙江哈尔滨 150040）摘　要：为简化二氢槲皮素提取工艺，降低能耗与成本，提高提取效率，促进二氢槲皮素的综合应用，本研究采用黑龙江省的兴安落叶松为原料，运用超高压辅助胶束提取技术提取落叶松中二氢槲皮素，测定落叶松树根、树干等不同部位的二氢槲皮素总含量。

以此总含量为基础，对提取胶束进行筛选，采用响应面试验对提取工艺进行优化，考察了料液比、提取压力、提取次数及胶束浓度4种不同因素对二氢槲皮素提取率的影响，并与微波提取、超声提取、回流提取等不同提取工艺进行能耗与CO 2排放比较。

结果表明，最终确定提取胶束为茶皂素，最佳提取工艺条件为：茶皂素浓度8%，料液比1:11.5，提取压力157 MPa ，提取次数3次，保压时间5 min ，在此最佳条件下重复进行3次实验，二氢槲皮素实际提取率可达84.35%±1.20%，与预测值84.98%基本一致。

英文介绍扶梯的特点作文Title: Features of Escalators。

Escalators are an essential feature of modern urban landscapes, facilitating efficient vertical movement in various public and commercial spaces. They boast several distinctive features that make them indispensable in crowded environments. In this essay, we will delve into the characteristics of escalators and their significance in contemporary infrastructure.1. Continuous Motion: One of the key features of escalators is their continuous motion. Unlike traditional staircases, which require individual steps to be climbed, escalators provide a seamless journey from one level to another. This continuous movement ensures a steady flow of passengers, minimizing congestion during peak hours in busy locations such as shopping malls, airports, and subway stations.2. Convenience and Accessibility: Escalators are designed to enhance convenience and accessibility for people of all ages and physical abilities. They offer a viable alternative to stairs, catering to individuals with mobility limitations, parents with strollers, and travelers with heavy luggage. By providing a smooth transition between different levels, escalators contribute to the inclusivity of public spaces, promoting equal access for everyone.3. Space Optimization: Another notable feature of escalators is their ability to optimize space utilization. Unlike elevators, which require dedicated shafts and mechanical rooms, escalators occupy minimal footprintwithin a building. This space-efficient design makes them ideal for installations in areas with limited space availability, allowing architects and designers to maximize floor area for other purposes.4. Safety Measures: Escalators are equipped with a range of safety features to ensure passenger well-being during transit. These include handrails for stability,safety sensors to detect obstructions, emergency stop buttons, and automatic braking systems to prevent accidents. Regular maintenance and inspections further enhance the safety standards of escalators, minimizing the risk of operational failures and ensuring passenger confidence.5. Energy Efficiency: Despite their continuous operation, modern escalators are designed to be energy-efficient. Advanced technologies such as variable speed drives and LED lighting systems help optimize energy consumption, reducing operational costs and environmental impact. Additionally, some escalators incorporate regenerative braking systems, which harness energy during descent and channel it back into the building's electrical grid.6. Architectural Integration: Escalators are not merely functional installations but also architectural elementsthat contribute to the aesthetic appeal of indoor and outdoor spaces. Designers have the flexibility to customize escalator aesthetics to harmonize with the surrounding environment, whether through sleek metallic finishes, glassenclosures, or artistic embellishments. This seamless integration enhances the overall ambiance of public areas, creating visually striking focal points.7. Reliability and Durability: Escalators are engineered for long-term reliability and durability, capable of withstanding heavy foot traffic and rigorous use over extended periods. Robust construction materials, such as stainless steel and tempered glass, ensure structural integrity and resistance to wear and tear. Regular maintenance schedules and proactive servicing further extend the lifespan of escalators, minimizing downtime and optimizing operational efficiency.In conclusion, escalators embody a combination of features that make them indispensable components of modern urban infrastructure. From their continuous motion and accessibility enhancements to space optimization and energy efficiency, escalators play a pivotal role in facilitating vertical transportation while ensuring passenger safety and comfort. As cities continue to evolve and expand, escalators will remain integral to the seamless flow ofpeople within built environments, embodying innovation and functionality in equal measure.。