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Studies on Antibacterial Effect of Berberis julianae Schneid and Cinnamomum camphora( L.) Presl. to Avian Escherichia coli and Salmonella

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Animal Husbandry and Feed Science 2013年第3期5卷 105-107页

作者： XI ge-ji MOU Ya chen Chao-xi College of Life Science and Technology Southwest University for Nationalities Animal Husbandry and Veterinary Bureau of Heishui County

[Objective]This study aimed to observe the antibacterial activity of Berberis julianae Schneid and Cinnamomum camphora（ L.） Presl. aqueous extracts and their antibiotical effect when being used with commonly used antibiotics in- vitro. [Method] Broth microdilution method and checkerboard dilution method were used and the reference strain E. coli ATCC25922 and clinical sample separation strains of E. coli and Salmonella were selected to determine the minimum inhibitory concentration（ MIC） and fractional inhibitory concentration（ FIC）. [Result] The MICs of Berberis julianae Schneid and Cinnamomum camphora（ L.） Presl. for E. coli and Salmonella were both 1 mg /mL,and that of other antibiotics for the two strains were in the quality control range provided by NCCLS. [Conclusion] The synergistic effect or additive effect were observed when they were applied with the commonly used antibiotics.

关键词： Berberis julianae Schneid Cinnamomum camphora(L.) Presl. Minimum inhibitory concentration(MIC) Fractional inhibitory concentration(FIC).

Leader-follower and cascade system based formation control of nonholonomic intelligent vehicles 26th

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Leader-follower and cascade system based formation control o...

Study and Analysis of Typical Mechanical Structure of Desktop 3D Printer Based on FDM Technology

第26届中国控制与决策会议

作者： Chuang Guo Jiali Qin Yanrong ge Yangzhou chen Beijing University of Technology Hebei Normal University

ISBN: (纸本)9781479937097

This paper presents a new framework for the formation control of nonholonomic intelligent vehicles combining the leader-follower and cascade system together. The formation model is obtained based on the leader-follower approach. The controllers are designed by using global fast terminal sliding mode control technique for the leader who tracks the reference trajectory and back-stepping method for the follower to keep the predetermined formation movement. Furthermore, the leader and follower of intelligent vehicles can be treated as every part of the cascade system, which relies on a kind of multi-platform information fusion technology to realize communication among vehicles. Simulation results show the correctness and effectiveness of the algorithm.

关键词： Formation control Nonholonomic intelligent vehicles Leader-follower Cascade system

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Study and Analysis of Typical Mechanical Structure of Deskto...

Liquid crystal integrated metalens with tunable chromatic aberration

2021中国铸造活动周

作者： Xiao ge Tingchun SHI Yankai chen Xiuyan YUE Departments of Automation University of Hangzhou Departments of Mechanical Engineering University of Hangzhou Departments of Library University of Hangzhou

Additive manufacturing is a kind of rapid manufacturing that aims to complete the manufacture of prototypes or parts of products based on discrete *** deposition modeling(FDM) technology,as one of the most widely used types of 3 D printing,has incomparable application prospect in many fields concerning medical,aerospace,automotive,construction,arts and *** the trend to rapidly create highly accurate devices that are in various complex shapes,FDM technology has become a hot spot of current *** view of the most widely used type of FDM technology in the field of 3 D printing,this article expounds the working principle,advantages and application fields of FDM *** common mechanical structures of FDM desktop 3 D printers are compared and analyzed,such as the rectangular box structure,rectangular bar structure,linear arm structure and parallel arm *** characteristics of various structures,transmission principles,and research progress are summarized through the selection of typical structural models,and the common features and existing common problems of FDM desktop 3 D printer structures are contrastively analyzed through table ***,the corresponding improvement methods are ***,the prospects of future development and innovation of the FDM desktop 3 D printer are analyzed.

关键词： 3D printing Additive manufacturing Mechanical structure Transmission principle Printing accuracy

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Advanced Photonics 2020年第3期2卷 35-41页

作者： Zhixiong Shen Shenghang Zhou Xinan Li Shijun ge Peng chen Wei Hu Yanqing Lu Nanjing University College of Engineering and Applied SciencesNational Laboratory of Solid State MicrostructuresKey Laboratory of Intelligent Optical Sensing and ManipulationCollaborative Innovation Center of Advanced MicrostructuresNanjingChina Jiangsu Industrial Technology Research Institute Institute for Smart Liquid CrystalsChangshuChina

Overcoming chromatic aberrations is a vital concern in imaging systems in order to facilitate fullcolor and hyperspectral *** contrast,large dispersion holds opportunities for spectroscopy and *** both functions into a single component will significantly enhance its versatility.A strategy is proposed to delicately integrate two lenses with a static resonant phase and a switchable geometric phase *** former is a metasurface lens with a linear phase *** latter is composed of liquid crystals(LCs)with space-variant orientations with a phase profile that is frequency *** this means,a broadband achromatic focusing from 0.9 to 1.4 THz is *** a saturated bias is applied on LCs,the geometric phase modulation vanishes,leaving only the resonant phase of the ***,the device changes from achromatic to ***,a metadeflector with tunable dispersion is demonstrated to verify the universality of the proposed *** work may pave a way toward active metaoptics,promoting various imaging applications.

关键词： active metalens liquid crystals chromatic aberration imaging terahertz

Can the bullet train speed up climate change mitigation in China?

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Frontiers of Engineering Management 2017年第1期4卷 104-105页

作者： Han LIN Saixing ZENG Shilong ge Yongtai chen School of Engineering Management Nanjing Audit University Antai College of Economics & Management Shanghai Jiao Tong University

Infrastructure systems play a fundamental role in reducing greenhouse gas(GHG)emissions to avert global climate change(Kennedy et al.,2014).Transportations are recognized as one of the key factors for facilitating climate change mitigation(Shaw et al.,2014).Approximately 19%of global energy consumption and 23%of energy-related carbon dioxide(CO2)emissions come from the transportation sector(IEA,2012).The demands are still increasing at an annual average rate of 1.4%(EIA,2016).Scholars

关键词： BT Can the bullet train speed up climate change mitigation in China

genome-wide meta-analysis identifies ten new psoriasis susceptibility loci in the Chinese population

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Journal of genetics and genomics 2022年第2期49卷 177-180页

作者： Weiwei chen Wenjun Wang Liang Yong Qi Zhen Yafen Yu Huiyao ge Yiwen Mao Lu Cao Ruixue Zhang Xia Hu Zhuo Li Yirui Wang Wencheng Fan Qiongqiong Xu Hui Zhang Shirui chen Jing Wu Liangdan Sun Department of Dermatology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230031China Key Laboratory of Dermatology(Anhui Medical University) Ministry of EducationHefei 230031China Anhui Province Laboratory of Inflammation and Immune Mediated Diseases 230031 China Anhui Provincial Institute of Translational Medicine 230031 China Department of Dermatology Huangshi Central HospitalAffiliated Hospital of Hubei Polytechnic UniversityHuangGang 438000China

Psoriasis is caused by many factors and is characterized by excessive proliferation of the epidermis and erythema with silver scales on the surface of the skin and concomitant with a variety of diseases(Griffiths et al., 2021). Despite the unclear aetiology,increasing evidence has demonstrated that genetic factors play key roles in the pathogenesis of psoriasis.

关键词： psoriasis diseases

Size characteristics and aging of airborne SiO2 nanoparticles

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Size characteristics and aging of airborne SiO2 nanoparticle...

不同月龄双线紫蛤数量性状的相关性和通径分析

第十二届全国气溶胶会议暨第十三届海峡两岸气溶胶技术研讨会

作者： Youfeng Wang Guanglu ge Lan chen Guolan Tian National Center for Nanoscience and Technology

Exposure to airborne nanoparticles in the occupational setting has been considered as a potential hazard, and has drawn much attention in research. The temporal evolution of airborne nanoparticles and the associated mechanisms need to be understood in order to design better control and protection. In this study, size characteristics and aging of airborne SiO 2 nanoparticles are investigated in a 1.2 m3 chamber under still conditions. The effects of coagulation and surface deposition are quantitatively assessed by measuring particle loss rates and calculating deposition velocity and coagulation coefficient parameters. To simulate workplace environment, the initial SiO 2 nanoparticle concentrations cover the range from 2.16 × 103 cm-3 to 1.79 × 105 cm-3. The results show that the overall loss rates are from 6.97 × 10-5 s-1 to 8.07 ×10-4 s-1. It was revealed that particle loss rates due to coagulation dominate with the fraction over 58%. Finally, it is interesting to find that the evolution of particle size with time is following d /3tefor lognormal-distribution nanoparticles. These findings suggest that the coagulation mechanism may be of more significance in terms of nanoparticles even with lower concentrations in certain workplace environment.

关键词： temporal evolution surface deposition coagulation particle size distribution

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渔业研究 2024年第3期46卷 242-247页

作者：巫旗生罗娟陈珍赐林炫锋祁剑飞宁岳郭香罗辉玉曾志南葛辉福建省水产研究所福建省海洋生物增养殖与高值化利用重点实验室福建省海洋生物资源开发利用协同创新中心福建厦门361013 福建省南日岛海洋生物技术有限公司福建莆田351174 莆田市水产科学研究所福建莆田351199

为研究双线紫蛤形态性状与体质量之间的关系,随机选取6、12和18月龄双线紫蛤(Soletellina diphos)各50个个体,分别测量壳长(SL)、壳高(SH)、壳宽(SW)、体质量(BW)共4个数量性状,采用相关分析和通径分析的方法分别计算不同月龄群体对体... 详细信息

为研究双线紫蛤形态性状与体质量之间的关系,随机选取6、12和18月龄双线紫蛤(Soletellina diphos)各50个个体,分别测量壳长(SL)、壳高(SH)、壳宽(SW)、体质量(BW)共4个数量性状,采用相关分析和通径分析的方法分别计算不同月龄群体对体质量的通径系数和决定系数。相关分析结果显示,6、18月龄群体均是壳长与体质量的相关系数最大(P<0.01)。根据多元回归分析结果,建立了3个月龄群体形态性状对体质量性状的多元回归方程:BW_(6)=-1.336+0.020SL+0.146SW+0.081SH,R^(2)=0.976;BW_(12)=-29.701+0.584SL+0.695SW,R^(2)=0.972;BW_(18)=-88.160+1.140SL+1.660SW,R^(2)=0.911。通径分析结果表明,6月龄群体中影响体质量的主要因素为壳宽(0.466),12和18月龄群体则为壳长(0.753,0.705),决定系数分析结果与通径分析结果相一致。本研究结果为双线紫蛤种质资源保护与利用提供了基础资料。

关键词：双线紫蛤数量性状相关系数决定系数通径分析

自由漂浮空间机器人路径优化的Legendre伪谱法

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力学学报 2016年第4期48卷 823-831页

作者：戈新生陈凯捷北京信息科技大学理学院北京100192 北京信息科技大学机电工程学院北京100192

基于Legendre伪谱法研究自由漂浮空间机器人非完整路径规划的最优控制问题.自由漂浮是空间机器人执行任务常用的工作模式,其路径优化是空间机器人完成复杂空间任务的基础.由于空间机器人不具有固定基座,机械臂和载体之间存在非完整约束... 详细信息

基于Legendre伪谱法研究自由漂浮空间机器人非完整路径规划的最优控制问题.自由漂浮是空间机器人执行任务常用的工作模式,其路径优化是空间机器人完成复杂空间任务的基础.由于空间机器人不具有固定基座,机械臂和载体之间存在非完整约束,使得自由漂浮空间机器人路径规划完全不同于地面机器人而变得具有挑战性.本文提出自由漂浮空间机器人路径规划的最优控制伪谱方法.首先,利用多体动力学理论建立自由漂浮空间机器人动力学模型,给定系统的初始和目标位形,选取机械臂关节耗散能最小为性能指标,并考虑实际控制输入受限,建立其路径规划的Bolza问题.然后,应用Legendre伪谱法,将状态和控制变量在Legendre--Gauss--Lobatto(LGL)点上离散,并构造Lagrange插值多项式逼近系统状态和控制变量,将连续路径优化问题离散化为非线性规划问题求解.最后通过数值仿真表明,应用Legendre伪谱法求解自由漂浮空间机器人非完整路径规划问题,得到的机械臂和载体最优运动轨迹,较好地满足各种约束条件,且计算精度高、速度快,并具有良好的实时性.

关键词：空间机器人 Legendre伪谱法非完整约束路径规划最优控制