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APOD mission status and preliminary results

Science China Earth Sciences 2020年第2期63卷 257-266页

作者： Geshi TANG Xie LI Jianfeng CAO Shushi LIU guangming chen Haijun MAN Xiaomin ZHANG Sihan SHI Ji SUN Yongping LI Andres CALABIA Nanjing University of Information Science&Technology(NUIST) Nanjing 210044China Aerospace Flight Dynamics Laboratory(AFDL) Beijing Aerospace Control Center(BACC)Beijing 100094China China Spacesat Co.Ltd. Beijing 100094China National Space Science Center(NSSC) Chinese Academy of SciencesBeijing 100190China

On September 20 th, 2015, twenty satellites were successfully deployed into a near-polar circular orbit at 520 km altitude by the Chinese CZ-6 test rocket, which was launched from the Tai Yuan Satellite Launch Center. Among these satellites, a set of 4 Cube Sats conform the atmospheric density detection and precise orbit determination(APOD) mission, which is projected for atmospheric density estimation from in-situ detection and precise orbit products. The APOD satellites are manufactured by China Spacesat Co. Ltd. and the payload instruments include an atmospheric density detector(ADD), a dual-frequency dualmode global navigation satellite system(GNSS) receiver(GPS and Beidou), a satellite laser ranging(SLR) reflector, and an S/Xband very long baseline interferometry(VLBI) beacon. In this paper, we compare the GNSS precise orbit products with colocated SLR observations, and the 3 D orbit accuracy shows better than 10 cm RMS. These results reveal the great potential of the onboard micro-electro-mechanical system(MEMS) GNSS receiver. After calibrating ADD density estimates with precise orbit products, the accuracy of our density products can reach about 10% with respect to the background density. Density estimates from APOD are of a great importance for scientific studies on upper atmosphere variations and useful for model data assimilation.

关键词： Atmospheric density Low Earth orbit(LEO) Precise orbit determination(POD)

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基于Compact-YOLO v4的茶叶嫩芽移动端识别方法

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农业机械学报 2023年第3期54卷 282-290页

作者：黄家才唐安陈光明张铎高芳征陈田南京工程学院机械工程学院南京211167 南京农业大学工学院南京210031 南京工程学院自动化学院南京211167

茶叶嫩芽精准识别是实现嫩芽智能化采摘的前提与基础,采用视觉和深度学习的嫩芽识别方法逐渐成熟,但该方法过度依赖于高性能硬件,不利于采茶机器人移动端的部署,针对这一问题,本文提出一种基于Compact-YOLO v4算法的茶叶嫩芽移动端识别... 详细信息

茶叶嫩芽精准识别是实现嫩芽智能化采摘的前提与基础,采用视觉和深度学习的嫩芽识别方法逐渐成熟,但该方法过度依赖于高性能硬件,不利于采茶机器人移动端的部署,针对这一问题,本文提出一种基于Compact-YOLO v4算法的茶叶嫩芽移动端识别方法。首先对YOLO v4算法的Backbone网络和Neck网络进行改进,将Backbone网络替换为GhostNet,将Neck网络中传统卷积替换为Ghost卷积,改进后的模型内存占用量仅为原来的1/5。接着运用迁移学习的训练方法提升模型精度,试验表明,Compact-YOLO v4算法模型的精度、召回率、平均精度均值、F1值分别为51.07%、78.67%、72.93%和61.45%。最后将本文算法模型移植到PRO-RK3568-B移动端开发板,通过转换模型、量化处理、改进部署环境3种方式,降低模型推理计算对硬件性能的需求,最终在保证嫩芽识别准确率的前提下,实现了优化模型推理过程、减轻移动端边缘计算压力的目的,为茶叶嫩芽采摘机器人的实际应用提供了技术支撑。

关键词：茶叶嫩芽识别轻量化 Compact-YOLO v4 移动端部署

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长距离定向钻穿越高硬度山体施工技术分析

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煤气与热力 2024年第2期44卷 V0022-V0024页

作者：王传惠同国普陈广明姚泽鸿陈旭明深圳市燃气集团股份有限公司广东深圳518040

以某工程长距离定向钻穿越高硬度山体为例,分析该工程存在的主要风险和问题,分析施工技术可行性及应对措施。

关键词：长距离水平定向钻高硬度山体岩石

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CHINA'S NEW GOLD MEDALISTS

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Women of China 1998年第2期 20-24页

作者： A YUAN chen guangming

SPORT championships can be dull no young outstanding athletes bu onto the scene. Fortunately, the Eighth National Games, held in Shanghai in 1997, did not: lack for risin stars. Its great success can be judged from the number of up-and-coming young athletes and their striking achievements at the Games. Particularly notable were the women athletes, many of them only 16 or 17 years old. It was these young

关键词： Li CHINA’S NEW GOLD MEDALISTS

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Therapeutic Effect of Intragastric Administration of Jiangtang Shuxin Recipe Suspension on Diabetic Heart Failure in Rats and Its Mechanism

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Medicinal Plant 2024年第2期15卷 33-37页

作者： Xiaofeng JIANG Jiajun chen guangming HUANG Yaya SHEN Xianzhao FU Clinical Medical College Youjiang Medical University for NationalitiesBaise 533000China Department of Rehabilitation Medicine Affiliated Hospital of Youjiang Medical University for NationalitiesBaise 533000China Department of Traditional Chinese Medicine Affiliated Hospital of Youjiang Medical University for NationalitiesBaise 533000China

[Objectives]To observe the therapeutic effect of intragastric administration of Jiangtang Shuxin recipe on diabetic heart failure(DHF)in rats and to explore its mechanism.[Methods]Fifty SD rats were randomly divided into five groups,with 10 rats in each *** models were prepared in the low-dose group,high-dose group,Western medicine group,and model group except the control *** in the low-dose and high-dose groups were given 1.0 and 1.5 g/(kg·d)Jiangtang Shuxin recipe suspension by gavage,*** in the Western medicine group were given gliquidone and benazepril by gavage for 2 months,and were fed with high-fat *** in the control group were fed with ordinary *** blood glucose(FBG),serum triglyceride(TG),low-density lipoprotein cholesterol(LDL-C),high-density lipoprotein cholesterol(HDL-C),C-reactive protein(CRP),interleukin-6(IL-6),tumor necrosis factor-α(TNF-α),creatine kinase isoenzyme(CK-MB),lactate dehydrogenase(LDH),pathological morphology of myocardial tissue,NF-κB p65 protein and IκBαprotein were compared among groups.[Results]Compared with the control group,the levels of FBG,serum TG,LDL-C,CRP,IL-6,TNF-α,CK-MB and LDH increased,while the level of serum HDL-C *** myocardial tissue was seriously damaged,and the expression of NF-κB p65 protein increased,while the expression of IκBαprotein decreased in the other four gruops(all P<0.05).Compared with the model group,the levels of FBG,serum TG,LDL-C,CRP,IL-6,TNF-α,CK-MB and LDH decreased,while the serum HDL-C level *** myocardial tissue damage was alleviated,and the expression of NF-κB p65 protein decreased,while the expression of IκBαprotein increased in the low-dose group,high-dose group and Western medicine group(all P<0.05).Compared with the Western medicine group,the levels of FBG,serum TG,LDL-C,CRP,IL-6,TNF-α,CK-MB and LDH decreased,and the level of serum HDL-C increased in the high-dose group(all P<0.05).[Conclusions]Jiangtang Shuxin recipe has a thera

关键词： Jiangtang Shuxin recipe Diabetes complications Heart failure NF-кB signaling pathway

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名优茶采摘机器人关键技术研究

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中国农机化学报 2023年第12期44卷 174-179页

作者：陈光明毛奔章永年南京农业大学工学院南京市210031 江苏省智能化农业装备重点实验室南京市210031

目前我国仍采用传统的人工方式采摘名优茶,实现名优茶机械化、智能化、高效率采摘成为当前一个研究热点。从名优茶嫩芽的识别和定位、机械臂的设计、末端执行器的设计等方面,介绍国内外名优茶采摘机器人的研究进展、特点,指出当前采茶... 详细信息

目前我国仍采用传统的人工方式采摘名优茶,实现名优茶机械化、智能化、高效率采摘成为当前一个研究热点。从名优茶嫩芽的识别和定位、机械臂的设计、末端执行器的设计等方面,介绍国内外名优茶采摘机器人的研究进展、特点,指出当前采茶机器人存在识别定位较差、采摘速度较慢等问题。研发具有普适性和通用性的嫩芽识别定位算法、高效的采摘机械臂及其控制系统、具有保护性的柔性末端执行器都是未来名优茶采摘机器人需要解决的关键问题。

关键词：名优茶采摘茶叶嫩芽检测机械臂末端执行器

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A Wavy-Structured Highly Stretchable Thermoelectric Generator with Stable Energy Output and Self-Rescuing Capability

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CCS Chemistry 2021年第10期3卷 2404-2414页

作者： Zhuoxin Liu Xiaodong Wang Shasha Wei Haicai Lv Jiaqian Zhou Peng Peng Hanfu Wang guangming chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055 College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060 National Center for Nanoscience and Technology of China Beijing 100190

Thermoelectric generators(TEGs)demonstrate great potential for flexible and wearable electronics due to the direct electrical energy harvested from waste *** wearability requires high mechanical flexibility and preferable stretchability,while current TEGs are primarily developed with rigid or non-stretchable components,which do not conform well to human skin or accommodate human motions,thus hindering further applications.

关键词： flexib le devic es thermoe lectrics energy conversion stretcha ble wearab le

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一种精馏型油分离器的实验研究

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制冷学报 2022年第1期43卷 145-150页

作者：葛俊娜唐黎明陈光明吴撼陈琪浙江大学制冷与低温研究所浙江省制冷与低温技术重点实验室杭州310027

精馏是利用气液混合物中各组分挥发度的差异进行分离。本文研制的精馏型油分离器结合了传统油分离器的分离原理和精馏原理,以塔内恒定压力1000 kPa、入口温度62℃、R134a和PAG的质量比为7∶3的进料条件用Aspen软件进行模拟,模拟可得通... 详细信息

精馏是利用气液混合物中各组分挥发度的差异进行分离。本文研制的精馏型油分离器结合了传统油分离器的分离原理和精馏原理,以塔内恒定压力1000 kPa、入口温度62℃、R134a和PAG的质量比为7∶3的进料条件用Aspen软件进行模拟,模拟可得通过精馏过程可除去二元混合物中的润滑油。为验证该油分离器的实际可行性,搭建了测试油分离器效率的实验装置,分别研究了制冷剂循环流量和顶端冷量对油分离器分离效率的影响,实验可得在制冷剂质量流量为7.5 g/s、顶端冷量为200 W的条件下其油分离效率高达为99.967%。综合模拟和实验结果可得:将精馏原理引入油分离器用于制冷剂润滑油混合物的分离,可以提高油分离器的分离效果。经测试,精馏型油分离器的分离效率比传统的旋风式油分离器高9.17%。

关键词：油分离器精馏制冷循环制冷剂

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An Alterable Clamping Force Fixture Controlled by High Speed on-off Valve

An Alterable Clamping Force Fixture Controlled by High Speed...

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第三届国际机械工程与力学会议

作者： guangming YUAN Houfang SUN guangming chen Shandong University of Technology Beijing Institute of Technology Army aviation institute of PLC

We put forward a project on alterable clamping force fixture direct at a constant clamping force fixture has an effect on part machining accuracy. According to the cutting force, the fixture optimization analysis the best clamping points and the clamping force of each point. The fixture can automatically adjust clamping force to suit with the cutting force so as to reduce the cutting deformation of machining system. We adopt the same process step numerical control technique to carry out self-adapting clamping function and adopt high speed on-off valve serve as kinetic control element of hydraulic pressure system to control the clamping force.

关键词： Self-adapting fixture High Speed on-off Valve Kinetic control

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Application of Two Stage Ejector Cooling System in a Bus

Application of Two Stage Ejector Cooling System in a Bus

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2011 2nd International Conference on Advances in Energy Engineering(ICAEE)

作者： Tawatchai Jaruwongwittaya guangming chen Institute of Refrigeration and Cryogenics National Key Laboratory of Clean Energy UtilizationZhejiang University

The aim of this paper is to investigate the feasibility of implementing a two stage ejector cooling system in a *** system uses water as the working fluid and a generator in which operates in the temperature range of 100-200℃.This system has a condensing temperature of 54℃ and an evaporating temperature of 5℃.The results indicate that the application of a two stage ejector cooling system to replace the vapor compression system in a bus is a suitable *** expected advantages of the proposed system are reduced fuel consumption,reduced green house gas emissions,less demand for power from the engine,a higher COP than that of the single stage ejector cooling system,and especially,resolving the problem of a high condensing temperature for the ejector cooling system in a bus.

关键词： Bus Entrainment ratio Exhaust gas Two stage ejector cooling

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