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Characterization of cocrystals formed by grinding amino acids through terahertz time-domain spectroscopy

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Chinese Science Bulletin 2014年第24期59卷 2987-2993页

作者： Xiaoyan Zhao Haixia Su Zhaohui zhang zhi Li Han zhang Tianyao zhang department of Instrumentation Science School of Automation and Electrical Engineering University of Science and Technology Beijing

In this paper,we used terahertz time-domain spectroscopy(THz-TDS)over a range of 0.3–2.5 THz to investigate the formation of solid-state cocrystals of amino acids,formed by grinding mixtures of two different kinds of amino *** comparison,we prepared dual-layer samples,combined by pressing two single-component pellets together without *** the ground-mixture samples,some extra absorption peaks appeared,different from the characteristic peaks of the pure components,but these peaks did not appear in the dual-layer ***,these extra absorption peaks in the THz range are unique features of *** our results,we believe that THz-TDS is a promising technique to characterize cocrystals.

关键词：太赫兹时域光谱氨基酸结晶物表征太赫波磨削混合物共结晶

A Virtual Assembly-oriented Multi-views information model and its XML description

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A Virtual Assembly-oriented Multi-views information model an...

2010 Chinese Control and Decision Conference

作者： Guangzhi Li,Linxun zhang~(**),Qingfeng Gao National engineering Research Center for CIMS,department of automation,Tsinghua university,Beijing,100084

Assembly information model is the basis of virtual ***,the process of assembly modeling mainly focuses on issues specifically,thus the model is lack of extensibility and *** on the Multi-views modeling technology,a new multi-views assembly model is proposed to support various fields of virtual assembly applications to solve this *** model consists of a basic information model and several different view models of applications in different areas-Assembly Process Planning,Assembly Resource usage,Virtual reality and Management. XML is used to describe and store the model and the efficiency and effect of virtual assembly is improved.

关键词： Virtual Assembly Multi-views modeling XML schema

Hierarchy Modeling for Component-based Complex Control Software

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Hierarchy Modeling for Component-based Complex Control Softw...

第二十六届中国控制会议

作者： zhang Jing,zhang Yunsheng,Xiang Fenghong College of Information engineering and automation,Kunming university of Science and Technology,Kunming 650051 P.R.china

Complex control software is heterogeneous and difficult to *** paper presents a component-based hierarchy modeling strategy that divides the basic computational parts into components and separates interaction among components as *** the support of hierarchy architecture,component and pattern achieve *** introduce a notion of behavior generator to characterize the property that the architecture can aggregate individual component’s computation into a well-defined composite computation such that heterogeneous models can be composed.A simplified component-oriented hierarchically hybrid control software is implemented to prove the feasibility and flexibility of our methodology.

关键词： Component pattern hierarchy modeling behavior generator XML

Position Errors and Interference Prediction-Based Trajectory Tracking for Snake Robots

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IEEE/CAA Journal of Automatica Sinica 2023年第9期10卷 1810-1821页

作者： Dongfang Li Yilong zhang Ping Li Rob Law Zhengrong Xiang Xin xu Limin zhu Edmond Q.Wu IEEE School of Electrical engineering and automation Fuzhou UniversityFuzhou 350108 the Sino-US Global Logistics Institute Shanghai Jiao Tong UniversityShanghai 200240 the Key Laboratory for Agricultural Machinery Intelligent Control and Manufacturing of Fujian Education Institutions Fuzhou 350108China School of Biological Science and Medical engineering and the Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education Beihang UniversityBeijing 100191China university of Macao Macao 999078China School of automation Nanjing University of Science and TechnologyNanjing 210094China College of Intelligence Science and Technology National University of Defence TechnologyChangsha 410073China School of Mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China department of automation Shanghai Jiao Tong UniversityShanghai 200240China

This work presents a trajectory tracking control method for snake *** method eliminates the influence of time-varying interferences on the body and reduces the offset error of a robot with a predetermined *** optimized line-of-sight(LOS)guidance strategy drives the robot’s steering angle to maintain its anti-sideslip ability by predicting position errors and ***,the predictions of system parameters and viscous friction coefficients can compensate for the joint torque control *** compensation is adopted to enhance the compatibility of a robot within ever-changing *** and experimental outcomes show that our work can decrease the fluctuation peak of the tracking errors,reduce adjustment time,and improve accuracy.

关键词： Anti-sideslip compensation snake robot trajectory tracking

A three-dimensional probabilistic fuzzy control system for network queue management

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控制理论与应用（英文版） 2009年第1期7卷 29-34页

作者： Yun zhang zhi LIU Yaonan WANG department of automation Guangdong University of Technology Guangzhou Guangdong 510006 China department of Electrical engineering Hunan University Changsha Hunan 410082 China

A novel probabilistic fuzzy control system is proposed to treat the congestion avoidance problem in transmission control protocol （TCP） networks. Studies on traffic measurement of TCP networks have shown that the packet traffic exhibits long range dependent properties called self-similarity, which degrades the network performance greatly. The probabilistic fuzzy control （PFC） system is used to handle the complex stochastic features of self-similar traffic and the modeling uncertainties in the network system. A three-dimensional （3-D） membership function （MF） is embedded in the PFC to express and describe the stochastic feature of network traffic. The 3-D MF has extended the traditional fuzzy planar mapping and further provides a spatial mapping among ＂fuzziness-randomness-state＂. The additional stochastic expression of 3-D MF provides the PFC an additional freedom to handle the stochastic features of self-similar traffic. Simulation experiments show that the proposed control method achieves superior performance compared to traditional control schemes in a stochastic environment.

关键词： Probabilistic fuzzy control Probabilistic fuzzy logic system Network control

Research on Reliability Test of Blade Server

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Research on Reliability Test of Blade Server

第三届国际自动化测试与仪器仪表学术会议

作者： zhang Xiaojie~1 Jiang Tongmin~1 Wang Dong~2 (1.department of System engineering of engineering Technology Beijing university of Aeronautics and Astronautics Beijing 100191 china) (2.School of automation Science and Electrical engineering Beijing university of Aeronautics and Astronautics Beijing 100191 china)

＜正＞Blade server represents the direction of high performance computing in the *** is very important for the development of super computer in our *** need to improve it based on reliability test for it stably *** paper introduces the necessary of reliability test research for blade server and some correlation test technology,for the characteristic of Dawning TC2600 blade server,this paper discusses the test principle and the function which selects in the actual use, explained reliability and environmental test technology for this server,the method of reliability test are giving *** Dawning TC2600 blade server that passed reliability test will play an important role in the field of high performance *** the end,pointed that the proper and effective environmental test can improve the reliability of blade *** this conclusion can be applied to other type’s server.

关键词： blade server high performance computing reliability test environmental test

Static Properties Model of Magnetically Controlled Shape Memory Alloy Based on Neural Networks

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Static Properties Model of Magnetically Controlled Shape Mem...

2009中国控制与决策会议

作者： Qingxin zhang School of automation Shenyang Institute of Aeronautical engineering Shenyang 110136,china Ming Yang School of automation Shenyang Institute of Aeronautical engineering Shenyang 110136,china. Jing zhang School of automation Shenyang Institute of Aeronautical engineering Shenyang 110136,china Xiaoyan Qiu School of automation Shenyang Institute of Aeronautical engineering Shenyang 110136,china,

Based on the experimental data obtained from static properties test of magnetically controlled shape memory alloy,using the function of approximation of BP neural networks,the forecasting modelling was *** experimental data and the forecasting data agreed well and the error was only 0.04%,which indicates that the modelling had good *** neural networks modelling can avoid the problem to calculate the modelling parameters based on the material physical properties and solve the material inherent coupling problem between magnetic field,the force fields and temperature *** provided a new method to research the properties of magnetically controlled shape memory alloy.

关键词： Index Terms-Magnetically Controlled Shape Memory Alloy Static Characteristics BP Neural Network Coupling

基于太赫兹时域光谱系统的双折射率晶体非接触式表征方法

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光谱学与光谱分析 2024年第8期44卷 2334-2339页

作者：袁媛张天尧张朝晖赵小燕李星玥李博扬吴先毫徐渤闫建峰孙溥曹灿北京科技大学自动化学院北京市工业波谱成像工程技术研究中心北京100083 中国舰船研究院新技术研究部北京100192 中国科学院空天信息创新研究院激光工程技术研究部北京100094

晶体的各向异性探测技术正逐渐向非接触和非破坏性方法发展。太赫兹辐射由于其对许多介电材料的大穿透深度和非电离特性,在各向异性材料的双折射研究中具有广阔的前景。石英、蓝宝石、液晶以及含有亚波长结构的超材料等都表现出太赫兹... 详细信息

晶体的各向异性探测技术正逐渐向非接触和非破坏性方法发展。太赫兹辐射由于其对许多介电材料的大穿透深度和非电离特性,在各向异性材料的双折射研究中具有广阔的前景。石英、蓝宝石、液晶以及含有亚波长结构的超材料等都表现出太赫兹双折射,作为偏振功能器件中的常用材料,其参数测量对于太赫兹器件研发具有重要意义。材料双折射率的提取往往依赖光轴方向和晶体厚度等先验参数。材料的光轴方向表征其各向异性的优先方向,对于已知光轴取向的晶体,可以根据经验选择合适的琼斯向量,而在实际应用中,只要选择探测太赫兹波的线偏振方向、光轴、探测轴。可以很容易地测量出寻常光和非常光,并直接从时域信号中计算出各自的折射率。对于光轴方向未知的材料,需要旋转样品以不同的方位角进行测量。双折射率的提取依赖于材料厚度的确定,通过游标卡尺或千分尺所得测量值与真实值存在较大差异,容易在样品表面造成划痕。无论是旋转样品还是厚度测量,人为操作都会为双折射率表征引入不确定性。基于透射式太赫兹时域光谱系统(THz-TDS)开发了一种双折射晶体光轴方向和晶片厚度的非接触式测量方法,不依赖于晶体先验参数,即可获取晶体完整的折射率。通过控制样品旋转配合光学延迟线动作实现光轴自动定位,利用传递函数迭代逼近算法提取晶体厚度和完整的折射率。为验证该方法,选择了在太赫兹波段具有双折射特性的(10-10)取向蓝宝石晶体进行测量,准确地提取了晶体在0.3~1.5 THz频率范围的平均寻常光折射率3.39±0.02,非常光折射率3.08±0.02,双折射率-0.31±0.02,并绘制了吸收谱。结果证明,所建立的测量方法避免了人工操作引起的样品损坏和定位误差,提高了双折射晶体太赫兹频段材料参数的测量速度、稳定性和精确度,对偏振敏感太赫兹测量技术及其应用具有重要意义。

关键词：太赫兹时域光谱双折射各向异性偏振蓝宝石

Study on Stability Control during Split-mu ABS Braking

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Study on Stability Control during Split-mu ABS Braking

2011 Chinese Control and Decision Conference（CCDC）

作者： Shuwen Zhou is with School of Mechanical engineering and automation,Northeastern university,Shenyang 110819,china.Siqi zhang is with Traffic & Mechanical engineering School,Shenyang Jianzhu university,Shenyang 110168,china.

Split-mu braking means that a vehicle brakes on a road surface with left right dissymmetrical friction *** most drivers,a heavy braking on split-mu road surface will cause vehicle to skid or spin or lose the steering *** this paper,an active front steering control was designed to improve the maneuver stability while braking on split-mu road surface with four-channel Anti-lock Braking System which will produce an additional yaw torque to let the vehicle deviate from the straight direction but can achieve maximum braking force.A multi-body vehicle model was built to simulate and analyze the vehicle dynamics performance during braking on split-mu road *** simulation results show that the new control system integrated with active front steering and four-channel ABS can improve the vehicle lateral stability on split-mu road surface braking.

关键词： Stability Control ABS Split-mu road surface