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| 1 | 基于改进的遗传–模拟退火算法和误差度分析原理的PMU多目标优化配置显示文摘为了进一步优化同步相量测量单元(phasor measurement unit,PMU)配置的合理性和效率,提出了一种新的误差度分析原理,并使用改进的遗传–模拟退火算法对多个IEEE标准测试系统进行了优化配置。该原理同时考虑了测量冗余度和状态估计的精度,并且避免引入雅可比矩阵,还具备可观测性分析的功能。研究结果表明:该算法不仅可以找到满足全网可观测性的所有PMU数目的配置解,而且进一步提升了全网的测量精度,从而证明了其有效性和优越性。 | 袁澎 艾芊 赵媛媛 | 2014 | 中国电机工程学报2014，34，13： | 36 |
| 2 | IMU/DGPS辅助车载CCD及激光扫描仪三维数据采集与建模显示文摘三维信息快速采集是真实场景建模与三维虚拟现实技术的关键。本文提出了一种基于激光扫描仪、线/面阵CCD相机及GPS与IMU等多种传感器融合的车载移动式数据快速采集系统。各传感器安置在车内稳定平台上并随车保持一致的运动姿态。通过对GPS和IMU数据进行卡尔曼(Kalman)滤波,可推测出整个系统及各传感器的位置和最佳姿态估计;从扫描仪点云数据可提取出街道场景中事物的三维几何信息;线阵CCD相机用于获取路面带状地物等线性特征;面阵CCD采集街道两侧面状纹理信息,从而快速获得城市目标的地理坐标和三维建模信息,由此可重建城市路面街道的三维真实场景。 | 陈允芳 叶泽田 谢彩香 石波 王贵宾 | 2006 | 测绘科学2006，31，5： | 31 |
| 3 | 强迫功率振荡源的在线定位分析技术显示文摘强迫功率振荡源的在线定位对电网安全稳定运行具有至关重要的作用。基于相量测量装置(phasor measurement unit,PMU)的实测数据和同步发电机转子运动方程,给出振荡过程中发电机机械输入功率波动的计算方法。通过对振荡过程中发电机机械输入功率波动、电气输出功率波动、转速(频率)波动的相位关系的理论分析,给出强迫功率振荡的在线监测分析方法。如果原动机不是强迫扰动源,发电机组因响应外界扰动而处于振荡过程中时,机械功率的波动相位滞后于电气功率的波动相位。由于引进PMU实测数据,所提方法可实现各个发电机组独立分析、相互解耦,避免了引入全网模型带来的分析误差和可靠性降低,减少了在线监测分析的复杂程度。实际算例表明,所提方法能有效判断同步发电机是否为强迫功率振荡源,为低频振荡的分析、控制提供可靠参考。 | 王茂海 孙昊 | 2014 | 中国电机工程学报2014，34，34： | 24 |
| 4 | Analysis of sensitivity and errors in Maglev vibration test system显示文摘In order to improve work performance of M aglev vibration test systems,the relationships of operating parameters between different components and system were researched. The working principle of photoelectric displacement sensor was analyzed. The relationship between displacement of transducer and the infrared light area received by sensor was given. The method of expanding the dynamic range of vibrator was proposed,which makes dynamic range of Maglev vibrator doubled. By increasing the amplification of the amplifier,the sensitive photoelectric displacement sensor can be maintained. Two modes of operation of the controller were analyzed. Bilateral work of vibration test system designed can further improve the stability of the system.An object vibration was measured by Maglev vibration test system designed when different vibration exciter frequencies were loaded. Experiments showthat the output frequency measured by Maglev vibration test system and loaded are the same. Finally,the errors of test system were analyzed. These errors of vibration test system designed can meet the requirements of application. The results laid the foundation for the practical application of magnetic levitation vibration test system. | JIANG Dong LIU Xukun WANG Deyu YANG Jiaxiang | 2016 | Instrumentation2016，3，1： | 24 |
| 5 | Wireless Communications with Programmable Metasurface:Transceiver Design and Experimental Results显示文摘Metasurfaces have drawn significant attentions due to their superior capability in tailoring electromagnetic waves with a wide frequency range, from microwave to visible light. Recently, programmable metasurfaces have demonstrated the ability of manipulating the amplitude or phase of electromagnetic waves in a programmable manner in real time, which renders them especially appealing in the applications of wireless communications. In this paper, we present the fundamental principle of applying programmable metasurface as transmitter for wireless communications. Then, we establish a prototype system of metasurface-based transmitter to conduct several experiments and measurements over the air, which practically demonstrate the feasibility of using programmable metasurfaces in future communication systems. By exploiting the dynamically controllable property of programmable metasurface, the design, implementation and experimental evaluation of the proposed metasurface-based wireless communication system are presented with the prototype, which realizes single carrier quadrature phase shift keying(QPSK) transmission over the air. In the developed prototype, the phase of the reflected electromagnetic wave of programma-ble metasurface is directly manipulated in real time according to the baseband control signal, which achieves 2.048 Mbps data transfer rate with video streaming transmission over the air. In addition, experimental result is provided to compare the performance of the proposed metasurface-based architecture against the conventional one. With the slight increase of the transmit power by 5 dB, the same bit error rate(BER) performance can be achieved as the conventional system in the absence of channel coding. Such a result is encouraging considering that the metasurface-based system has the advantages of low hardware cost and simple structure, thus leading to a promising new architecture for wireless communications. | Wankai Tang Xiang Li Jun Yan Dai Shi Jin Yong Zeng Qiang Cheng Tie Jun Cui | 2019 | China Communications2019，16，5： | 23 |
| 6 | INTELLIGENT VIRTUAL CONTROL:MEASURING INSTRUMENT FROM WHOLE TO PART显示文摘A new concept called intelligent virtual control (IVC), which can be driven by measuring functions, is put forward. This small 'intelligent measurement instrument unit (IMIU)', carrying with functions of instrument, consists of different types of intelligent virtual instrument (IVI) through individual components together as building blocks and can be displayed directly on the computer screen. This is a new concept of measuring instrument, and also an important breakthrough after virtual instrument (VI). Virtual control makes instrument resources obtain further exploitation. It brings about a fundamental change to the design and manufacturing mode. The instrument therefore, can not only be produced directly inside a PC, but the product is involved in the 'green product' system. So far, all the present digital instruments will grow to be replaced by intelligent control with green characteristics. | Qin Shuren Tang BaopingCollege of Mechanical Engineering, Chongqing University, Chongqing 400044, China | 2002 | Chinese Journal of Mechanical Engineering2002，15，2： | 19 |
| 7 | 多时滞广域测量电力系统稳定分析与协调控制器设计显示文摘根据电力系统存在时滞的差异性,将控制器信号分为本地无时滞控制输入信号和广域异地多时滞控制输入信号两部分,建立了多时滞电力系统的模型。运用Lyapunov-Krasovskii泛函理论推导出了含有时滞分量的线性多时滞电力系统稳定判据,将控制问题转换为线性矩阵不等式的可行性问题,并采用模型降阶方法对原系统进行降阶,实现了含有多个时滞的广域输出反馈控制,并计算出了能够使闭环电力系统稳定的最大时滞时间。讨论了系统稳定判据中时滞分量与广域控制器参数之间的关系,以及对区域间振荡的控制效果。最后以两区域四机系统为例,用时域仿真的结果说明了本文所提出的多时滞控制方法的有效性。 | 古丽扎提.海拉提 王杰 | 2014 | 电工技术学报2014，29，2： | 19 |
| 8 | 基于惯性测量单元的激光雷达点云融合方法显示文摘针对16线激光雷达环境感知过程中,点云数据稀疏,导致对目标检测和识别困难的问题,提出了一种基于惯性测量单元(InertialMeasurementUnit,IMU)的激光雷达点云融合方法。建立了激光点云数据的融合模型,有效利用历史点云数据与历史检测结果,获得较多的环境信息,提高了目标物的检测精度。利用16线激光雷达与自研的IMU传感器进行实验验证,结果表明能够实现激光雷达点云的融合,进一步提高激光雷达对目标物的检测能力,并且以较低的硬件成本,实现更加高级的环境感知能力,对无人驾驶等技术的研究具有实际应用价值。 | 张艳国 李擎 | 2018 | 系统仿真学报2018，30，11： | 18 |
| 9 | Recent research and applications of GPS based technology for bridge health monitoring显示文摘Today,long-span bridges are being designed to be more flexible and to resist extensive impacts from changes in temperature,severe wind gusts and earthquake tremors. Structural responses (especially displacement) of bridge structures are becoming increasingly important for the finite element (FE) modal updating,structural response prediction and safety evaluation. Methods of global displacement sensing were developed for these needs. This paper presents an overview of current research and development activities in the field of bridge health monitoring using the global positioning system (GPS). The GPS monitoring technology and its accuracy assessment method are also briefly described. Finally,existing problems and promising research efforts in the GPS based bridge health monitoring are discussed. | YI TingHua1,2, LI HongNan1 & GU Ming2 1 Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116023, China 2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China | 2010 | Science China(Technological Sciences)2010，53，10： | 18 |
| 10 | 基于相对增益和改进粒子群算法的PSS与直流调制协调策略显示文摘现有电力系统稳定器(power system stabilizer,PSS)和直流调制多使用本地信号作为控制器反馈输入信号,控制器间的交互作用可能降低甚至破坏系统稳定性。提出了一种基于广域测量信号的PSS与直流调制协调策略,首先通过留数法选择对于振荡模态可观性较强的广域信号作为阻尼控制器备选反馈信号;其次通过相对增益方法选择使PSS和直流调制交互影响最小的备选信号作为最佳反馈信号;而后设计分散控制器,并运用基于混沌和差分进化的混合粒子群优化算法对PSS和直流调制控制器参数进行协调优化。最后,通过EPRI 36节点系统仿真验证了协调策略的正确性和有效性。 | 王曦 李兴源 赵睿 | 2014 | 中国电机工程学报2014，34，34： | 17 |
| 11 | Recent progress of residual stress measurement methods: A review显示文摘Residual stress is one of the main factors affecting the mechanical properties of materials, such as their strength, plasticity and surface integrity. For instance, tensile stress conditions can adversely affect material performance or component life, while compressive stress conditions can improve material fatigue strength. During the processing of integrated aviation structures, machining deformation caused by residual stress has become one of the most prominent manufacturing problems. Therefore, it is very important to measure and evaluate the stress for real applications.This paper reviews the research of residual stress measurement methods over the past five years by classifying them according to the measurement methods appearing in each stage. The existing problems and difficulties of each measurement technology are summarized, and future trends are forecasted. This paper provides a reference for further in-depth study of residual stress measurement technologies. | Jiang GUO Haiyang FU Bo PAN Renke KANG | 2021 | Chinese Journal of Aeronautics2021，34，2： | 17 |
| 12 | 地质样品Sr同位素激光原位等离子体质谱(LA-MC-ICP-MS)测定显示文摘Sr同位素在研究岩浆演化及其源区具有重要的示踪作用。MC-ICP-MS的出现为具有高Sr含量地质样品的激光原位Sr同位素测定变成了现实。本文利用Netpune MC-ICP-MS和193nm准分子激光联机,通过滨珊瑚、斜长石、磷灰石和钙钛矿等系列实验,建立了激光原位Sr同位素测定方法。实验结果表明,激光Sr同位素测定中Kr、Rb和稀土元素二价离子的干扰能够有效扣除,而钙聚合物的干扰在Neptune型MC-ICP-MS并不显著。不同激光参数的实验表明,大激光束斑产生更高信号强度,因而Sr同位素精度更高,同一激光束斑大小,激光脉冲频率对Sr同位素精度无明显影响。 | 杨岳衡 吴福元 谢烈文 杨进辉 张艳斌 | 2009 | 岩石学报2009，25，12： | 16 |
| 13 | Phasor measurement units, WAMS, and their applications in protection and control of power systems显示文摘The paper provides a short history of the phasor measurement unit(PMU) concept. The origin of PMU is traced to the work on developing computer based distance relay using symmetrical component theory. PMUs evolved from a portion of this relay architecture. The need for synchronization using global positioning system(GPS) is discussed, and the wide area measurement system(WAMS) utilizing PMU signals is described. A number of applications of this technology are discussed, and an account of WAMS activities in many countries around the world are provided. | Arun G.PHADKE Tianshu BI | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，4： | 16 |
| 14 | Field measurement and analysis of turbulence coherence for Typhoon Nuri at Macao Friendship Bridge显示文摘For the purpose of investigating the turbulent and spatial coherent characteristics of strong wind during typhoon landing period,two 3-dimensional ultrasonic anemometer stations were set up 30 m horizontally apart on the Macao Friendship Bridge to caputure the turbulent wind velocities of Typhoon Nuri. Based on the reliable and representative field measured data,the mean wind speed and direction,turbulence intensity,turbulence integral scale,turbulence power spectra,spatial correlation coefficient and coherence function were statistically evaluated. The field measurement analysis have presented the following results: 1) Two anemometer stations provided consistent results. The mean wind speed variation in time domain presented typical M-shape curves. The strong wind (10-minute mean wind speed higher than 8th grade in Beaufort wind scale) direction changed in a big range up to 122-degrees-angle,indicating the field measurements scoped over the typhoon landing period. 2) The ratio of the longitudinal,lateral and vertical turbulence intensities of the strong wind in the typhoon eye wall region was 1:0.96:0.36. Compared with the code defined ratio 1:0.88:0.5,the lateral component was larger and the vertical component was smaller. 3) The value of integral scale increased when the eye wall of Typhoon Nuri passed over the field measurement site. Before the center of Typhoon Nuri arrived,the integral scale of the strong typhoon wind was about twice compared with that for the non-typhoon wind. 4) The spatial correlation of the turbulent wind,coherence function curve and the decay factor had significant differences at different times during the typhoon process. In the eye wall of the typhoon,the horizontal spatial correlation was relatively strong and horizontally spatial correlation spectrum decayed slower with frequency increase. The minimum regressed coefficient C in coherence function model was 4.67,which is lower than the code defined low limit. The maximum decay factor was 27.75 which is larger than the code defined upper bound. The strong wind characteristic parameters of Typhoon Nuri mentioned above partly represented the turbulent and spatial coherent characteristic during strong typhoon wind period. | SONG LiLi1, PANG JiaBin2, JIANG ChengLin3, HUANG HaoHui3 & QIN Peng3 1 Guangzhou Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080, China 2 Tongji University, Shanghai 200092, China 3 Guangdong Climate Centre, Guangzhou 510080, China | 2010 | Science China(Technological Sciences)2010，53，10： | 15 |
| 15 | Reduced parameter model on trajectory tracking data with applications显示文摘The data fusion in tracking the same trajectory by multi-measurernent unit (MMU) is considered. Firstly, the reduced parameter model (RPM) of trajectory parameter (TP), system error and random error are presented,and then the RPM on trajectory tracking data (TTD) is obtained, a weighted method on measuring elements (ME) is studied and criteria on selection of ME based on residual and accuracy estimation are put forward. According to RPM,the problem about selection of ME and self-calibration of TTD is thoroughly investigated. The method improves data accuracy in trajectory tracking obviously and gives accuracy evaluation of trajectory tracking system simultaneously. | 王正明 朱炬波 | 1999 | Science China(Technological Sciences)1999，42，2： | 14 |
| 16 | Atmospheric particulate pollution of Lanzhou using magnetic measurements显示文摘To differentiate between natural and anthropogenic particulate sources in the atmosphere in Lanzhou City, samples were collected in different sites. The dust flux was calculated and magnetic measurements were conducted. Results show a distinct pattern of variation of dust flux within a year and it agrees with the shifts of atmospheric circulation regime. The magnetic parameters indicate that natural sources are the major components of atmospheric particulate during late spring and early summer, while anthropogenic sources contribute much more during winter months. The data also support the earlier findings that magnetic parameters are effective for differentiating between particulate arising from natural sources such as soil erosion and from anthropogenic sources such as coal combustion. | Chen Fa\|hu, Yang Li\|ping, Wang Jian\|min, Zhang Jia\|wu Institute of Environment & Hazards, Lanzhou University, Lanzhou 730000, China. E\|mail: fhchen@lzu.edu.cn | 1999 | Journal of Environmental Sciences1999，11，3： | 14 |
| 17 | The levels of serum fibrosis marks and morphometric quantitative measurement of hepatic fibrosis显示文摘Objective: To study the relationship between the ser-um levels of hyaluronic acid (HA), procollagen typeⅢ (PCⅢ), collagen type Ⅳ (CIV) and the histologi-cal degree of hepatic fibrosis evaluated by imageanalysis, and the clinical significance of serum HA,PC Ⅲ, C Ⅳ in the diagnosis of hepatic fibrosis in pa-tients with chronic viral hepatitis.Methods: The concentrations of serum HA, PC Ⅲ, CⅣ in 151 patients with chronic viral hepatitis weremeasured by radioimmunoassay. Liver biopsies wereperformed in all the patients. Histological sections of4 μm thickness were stained with Masson’s trichromefor fibrosis assessment. Morphometric quantitativemeasurements for hepatic fibrosis assessment in the 4μm sections were performed using a fully automatedimage analysis system. Serum levels of HA, PC Ⅲ,and C Ⅳ were analyzed at different stages of liver pa-thology and compared with the morphometric quanti-tative measurements of hepatic fibrosis.Results: The serum levels of HA, PC Ⅲ, C Ⅳ all ele-vated gradually with the progression of the disease,and all reached the highest in patients with liver cir-rhosis. There was a significant difference in the levelsof these 3 components between liver cirrhosis groupand the other groups (P<0.05). They all increasedsteadily with the histological stages of hepaticfibrosis, and reached the highest levels in stage Ⅳ.The serum levels of HA, PC Ⅲ, C Ⅳ were all positive-ly correlated with the histological stages of liver sec-tions and the morphometric measurement (P<0.001). The coefficients with stages were 0.694,0.493, 0.552 (P<0.001), respectively and with sur-face density of total collagen on liver biopsy sectionsby image analysis were 0. 715, 0. 595, 0. 573 (P<0.001), respectively.Conclusion: The serum levels of HA, PC Ⅲ, C Ⅳwere in consistent with the degree of hepatic fibrosis,and the determination of these marks is valuable fordetecting hepatic fibrosis. | Shi-Bin Xie Ji-Lu Yao Shu-Sen Zheng Chun-Lan Yao Rong-Qin Zheng From the Department of Infectious Diseases, Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China | 2002 | Hepatobiliary & Pancreatic Diseases International2002，1，2： | 13 |
| 18 | Review of soot measurement in hydrocarbon-air flames显示文摘Soot,which is produced in fuel-rich parts of flames as a result of incomplete combustion of hydrocarbons,is the No.2 contributor to global warming after carbon dioxide.Developing soot measurement techniques is important to understand soot formation mechanism and control soot emission.The various soot measurement techniques,such as thermophoretic sampling par-ticles diagnostics followed by electron microscopy analysis,thermocouple particle densitometry,light extinction,laser-induced incandescence,two-color method,and emission computed tomography,are reviewed in this paper.The measurement principle and application cases of these measurement methods are described in detail.The development trend of soot measurement is to realize the on-line measurement of multi-dimensional distributions of temperature,soot volume fraction,soot particle size and other parameters in hydrocarbon-air flames.Soot measurement techniques suitable for both small flames in laboratories and large-scale flames in industrial combustion devices should be developed.Besides,in some special situations,such as high-pressure,zero gravity and micro-gravity flames,soot measurement also should be provided. | LOU Chun,CHEN Chen,SUN YiPeng&ZHOU HuaiChun State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China | 2010 | Science China(Technological Sciences)2010，53，8： | 13 |
| 19 | Power system low frequency oscillation monitoring and analysis based on multi-signal online identification显示文摘The advance in the wide-area measurement system (WAMS) is driving the power system to the trend of wide-area monitoring and control.The Prony method is usually used for low frequency oscillation online identification.However,the identified amplitude and phase information is not sufficiently used.In this paper,the amplitude is adopted to detect the occurrence of the oscillation and to obtain the mode observability of the sites.The phase is adopted to identify the oscillation generator grouping and to obtain the mode shapes.The time varying characteristics of low frequency oscillations are studied.The behaviors and the characters of low frequency oscillations are displayed by dynamic visual techniques.Demonstrations on the '11.9' low frequency oscillation of the Guizhou Power Grid substantiate the feasibility and the validation of the proposed methods. | YUAN Ye1,2,SUN YuanZhang2,CHENG Lin2,CHEN Gang2 & WANG Peng3 1 State Nuclear Electric Power Planning Design and Research Institute,Beijing 100032,China 2 State Key Laboratory of Power Systems,Deptment of Electrical Engineering,Tsinghua University,Beijing 100084,China 3 EEE School,Nanyang Technological University,Singapore | 2010 | Science China(Technological Sciences)2010，53，9： | 13 |
| 20 | Analysis and discussion on launching mechanism and tactical electromagnetic railgun technology显示文摘This paper begins with a discussion on the significance of multi-physical fields in the research of railgun launching mechanism, followed by an introduction of research work about dynamic measurements and numerical simulations. The application of some measurement methods including the atomic emission spectrum, fiber-optic strain, optical level, pulsed X-ray, and high-speed video in observing the launching process was introduced. The models about the electromechanical dynamic processes and multi-physical fields in a railgun were developed. The mechanisms of the grooving, arc transition, and gouging were analyzed. These work provided a deeper understanding of launching mechanism of electromagnetic railgun. Some issues about the tactical railgun, such as the fiber composite overwrapped barrel, recoil,loading modes and eddy current loss were also discussed. Taking a medium-caliber launcher as an example, the basic process of design and analysis was introduced. | Bao-ming Li Qing-hua Lin | 2018 | Defence Technology(防务技术)2018，14，5： | 13 |
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