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A Cross-cultural Examination of the Noise-sensitivity Scale-short Form:Measurement Invariance Testing between the US and Chinese Samples
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作者 Zachary D Miller HUANG Jun Wu +12 位作者 Heather Costigan LUO Jing DENG Hui Juan XU Xiao Qing B Derrick Taff SUN Cheng YANG Xi WANG Zhong Lei LIN Dan QU Shu Wen PAN Bing LI Guang Ming Peter Newman 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2018年第11期851-854,共4页
Unwanted sound that is unpleasant or disruptive to hear, often interpreted as noise, is a widespread environmental pollutant. Similar to other environmental pollutants, this noise incurs a variety of costs to society.... Unwanted sound that is unpleasant or disruptive to hear, often interpreted as noise, is a widespread environmental pollutant. Similar to other environmental pollutants, this noise incurs a variety of costs to society. Numerous negative health impacts are linked to increases in noise exposure,such as increased cardiovascular risk;and sleep 展开更多
关键词 SF NSS A Cross-cultural Examination of the Noise-sensitivity Scale-short Form:measurement Invariance testing between the US and Chinese Samples CFA TLI CFI US
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STUDY ON TESTING TECHNIQUE FOR MEASUREMENT OF FATIGUE-CREEP INTERACTION RESISTANCE 被引量:1
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作者 He Qingfu ChenGuoliang ZhangShouhua(Northern Jiaotong University Beijing University of Scienceand Technology) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 1995年第4期278-280,共17页
By using dropped stress creep method a new testing technique for measurement of the fa-tigue-creep interaction resistance is developed. At varied adjusted mean stresses the creep testingwas performed repeatedly When a... By using dropped stress creep method a new testing technique for measurement of the fa-tigue-creep interaction resistance is developed. At varied adjusted mean stresses the creep testingwas performed repeatedly When an unlimited extensive incubation period with zero creep rate oc-curred. the stress cavsing zero creep rate is defined as fatigue-creep resistance. The developped test-ing technique was used to measure the fatigue-creep resistance in F anc C regions. The dynamic ef-fective stress could yield a better descrption of fatigue and creep interaction. The fatigue-creep rateequations with varied exponents inF of C region are established. The different deformation mecha-nisms in F or C regions are indicated 展开更多
关键词 Fatigue-creep interaction Resistance measurement testing technique
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Block-based test data adequacy measurement criteria and test complexity metrics
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作者 陈卫东 杨建军 +1 位作者 叶澄清 潘云鹤 《Journal of Zhejiang University Science》 CSCD 2002年第1期37-41,共5页
On the basis of software testing tools we developed for programming languages, we firstly present a new control flowgraph model based on block. In view of the notion of block, we extend the traditional program\|based ... On the basis of software testing tools we developed for programming languages, we firstly present a new control flowgraph model based on block. In view of the notion of block, we extend the traditional program\|based software test data adequacy measurement criteria, and empirically analyze the subsume relation between these measurement criteria. Then, we define four test complexity metrics based on block. They are J\|complexity 0; J\|complexity 1; J\|complexity \{1+\}; J\|complexity 2. Finally, we show the Kiviat diagram that makes software quality visible. 展开更多
关键词 block NODE SEGMENT control flowgraph model test data adequacy measurement criteria test complexity metric Kiviat diagram
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MLSI-RT: memorize LOS range measurements identified residual test location algorithm and performance analysis
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作者 马兵 邢建平 张军 《Journal of Shanghai University(English Edition)》 CAS 2011年第3期190-193,共4页
The dominant error source of mobile terminal location in wireless sensor networks (WSNs) is the non-line-of-sight (NLOS) propagation error. Among the algorithms proposed to mitigate the influence of NLOS propagati... The dominant error source of mobile terminal location in wireless sensor networks (WSNs) is the non-line-of-sight (NLOS) propagation error. Among the algorithms proposed to mitigate the influence of NLOS propagation error, residual test (RT) is an efficient one, however with high computational complexity (CC). An improved algorithm that memorizes the light of sight (LOS) range measurements (RMs) identified memorize LOS range measurements identified residual test (MLSI-RT) is presented in this paper to address this problem. The MLSI-RT is based on the assumption that when all RMs are from LOS propagations, the normalized residual follows the central Chi-Square distribution while for NLOS cases it is non-central. This study can reduce the CC by more than 90%. 展开更多
关键词 memorize LOS range measurements identified residual test (MLSI-RT) computational complexity (CC) nonline-of-sight (NLOS) residual test (RT) algorithm simplified residual test (SRT)
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SMART STRUCTURES USING PIEZOELEMENTS FOR ACTIVE VIBRATION AND NOISE SUPPRESSION IN AVIATION AND AEROSPACE 被引量:1
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作者 陈仁文 陶宝祺 +1 位作者 陈勇 朱晓锦 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1998年第2期39-44,共6页
Smart material and structure (SMS) is a challenging novel technique for the 21 century especially in fields of aviation and aerospace. Vibration and noise suppression smart structure is an important branch of SMS. T... Smart material and structure (SMS) is a challenging novel technique for the 21 century especially in fields of aviation and aerospace. Vibration and noise suppression smart structure is an important branch of SMS. There are several typical structures such as the cabin of an airplane, space station, the solar board of satellite and the rotor blade of a helicopter, of which the vibrations and radiation noises have bad influences on precise equipments and aiming systems. In order to suppress vibrations and noises of these structures, several algorithms are applied to the models which simulate the structures. Experiments are performed to suppress vibrations and noises by bonding sensors and actuators to the structures at the optimized locations and using computer based measurement and control systems. For the blade vibration control of a helicopter, a non contact method of signal transmission by magneto electric coupling is discussed. The experimental results demonstrate that the methods used for active control are effective. 展开更多
关键词 VIBRATION active control smart structure piezoceramic element noise suppression test and measurement system
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Experimental Investigation on Basic Prototype of Solid Propellant Impulsive Microthrusters 被引量:1
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作者 李世鹏 张平 《Journal of Beijing Institute of Technology》 EI CAS 2000年第3期347-352,共6页
A new type of impulsive microthruster and its measurement system were designed for the aim of testing the performance of a basic prototype of solid propellant impulsive microthruster. Two sets of tests were conducted.... A new type of impulsive microthruster and its measurement system were designed for the aim of testing the performance of a basic prototype of solid propellant impulsive microthruster. Two sets of tests were conducted. The tests show that the ignitor and the main charge of the microthruster match well, the dynamic and static capability of the test and measurement meets the test requirement and the result is creditable. The measured technical characteristics of the microthruster are that the ignition delay time is shorter than 0 3?ms, the total impulse is over 3?N·s, the operational time is shorter than 16?ms and the mass ratio of the thruster is 0 216. 展开更多
关键词 solid propellant rocket motor microthruster PROTOTYPE test and measurement technique
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Design and theoretical analysis of test system for propellants' gas pressure in warhead
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作者 边晶晶 武震 《Journal of Measurement Science and Instrumentation》 CAS 2014年第1期10-14,共5页
Aiming at harsh environment of cluster bombs center tube explosion dispersion and difficulties in installation of traditional test systems,a storage test system based on 16-bit ultra-low power microcontroller MSP430 i... Aiming at harsh environment of cluster bombs center tube explosion dispersion and difficulties in installation of traditional test systems,a storage test system based on 16-bit ultra-low power microcontroller MSP430 is designed in order to acquire gas pressure during cluster bombs dispersion.To meet the requirement of low power consumption,the working states of system's modules during data acquisition are elaborated and the equation to calculate the gas pressure change during cylindrical center tube opening the hatch is deduced.The field test is conducted and good test results are obtained. 展开更多
关键词 warhead dispersion center tube explosion dispersion gas pressure storage test and measurement low power consumption
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An NT-MT Combined Method for Gross Error Detection and Data Reconciliation 被引量:5
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作者 梅从立 苏宏业 褚健 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2006年第5期592-596,共5页
An NT-MT combined method based on nodal test (NT) and measurement test (MT) is developed for gross error detection and data reconciliation for industrial application. The NT-MT combined method makes use of both NT and... An NT-MT combined method based on nodal test (NT) and measurement test (MT) is developed for gross error detection and data reconciliation for industrial application. The NT-MT combined method makes use of both NT and MT tests and this combination helps to overcome the defects in the respective methods. It also avoids any artificial manipulation and eliminates the huge combinatorial problem that is created in the combined method based on the nodal test in the case of more than one gross error for a large process system. Serial compensation strategy is also used to avoid the decrease of the coefficient matrix rank during the computation of the proposed method. Simulation results show that the proposed method is very effective and possesses good performance. 展开更多
关键词 data reconciliation gross error detection measurement test nodal test
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Study and application of monitoring plane displacement of a similarity model based on time-series images 被引量:5
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作者 Xu Jiankun Wang Enyuan +1 位作者 Li Zhonghui Wang Chao 《Mining Science and Technology》 EI CAS 2011年第4期501-505,共5页
In order to compensate for the deficiency of present methods of monitoring plane displacement in similarity model tests,such as inadequate real-time monitoring and more manual intervention,an effective monitoring meth... In order to compensate for the deficiency of present methods of monitoring plane displacement in similarity model tests,such as inadequate real-time monitoring and more manual intervention,an effective monitoring method was proposed in this study,and the major steps of the monitoring method include:firstly,time-series images of the similarity model in the test were obtained by a camera,and secondly,measuring points marked as artificial targets were automatically tracked and recognized from time-series images.Finally,the real-time plane displacement field was calculated by the fixed magnification between objects and images under the specific conditions.And then the application device of the method was designed and tested.At the same time,a sub-pixel location method and a distortion error model were used to improve the measuring accuracy.The results indicate that this method may record the entire test,especially the detailed non-uniform deformation and sudden deformation.Compared with traditional methods this method has a number of advantages,such as greater measurement accuracy and reliability,less manual intervention,higher automation,strong practical properties,much more measurement information and so on. 展开更多
关键词 Plane displacement monitoring Similarity model test Time-series images Displacement measurement
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Constant-Stress Accelerated Degradation Life Test of an Organic Light-Emitting Diode Display under Violet Light
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作者 François-Xavier Fortier Sylvain G. Cloutier 《Engineering(科研)》 2016年第2期45-51,共7页
The lifetime of commercial OLED display devices increases, so does the need for an accelerated lifetime testing method. The present work proposes a simple and accurate blackbox testing approach for commercial PMOLED d... The lifetime of commercial OLED display devices increases, so does the need for an accelerated lifetime testing method. The present work proposes a simple and accurate blackbox testing approach for commercial PMOLED display lifetime assessment using violet light-induced accelerated aging. Maximum likelihood estimations using lognormal distributions are performed based on datasets acquired from samples exposed to six different degrees of violet irradiance and accelerated life model is shown to accurately fit experimental data using an inverse power law. Based on these results, weighted average of the logarithmic standard deviation, the average life and median life can then be obtained for specific conditions of operation of the devices. As this method relies exclusively on violet light-induced degradation at room-temperature, this minimally-invasive testing procedure requires no significant modification to the display hardware architecture. 展开更多
关键词 PMOLED DISPLAYS Tests and measurements LIFETIME Light-Induced Aging Accelerated Degradation testing
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Scanning Hartmann test method and its application to lens aberration measurement 被引量:1
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作者 刘丹 黄惠杰 +3 位作者 任冰强 曾爱军 闫岩 王向朝 《Chinese Optics Letters》 SCIE EI CAS CSCD 2006年第12期725-728,共4页
A scanning Hartmann test method is proposed and its measurement principle is described. The scanning Hartmann test setup is formed by modifying the Hartmann screen of the conventional Hartmann test setup. With the rot... A scanning Hartmann test method is proposed and its measurement principle is described. The scanning Hartmann test setup is formed by modifying the Hartmann screen of the conventional Hartmann test setup. With the rotation of the scanning Hartmann screen and the improved hole arrangement, the whole information of the lens to be tested in the full aperture can be obtained. The measurement accuracy of the aberration is improved and the local error of the lens can be got. In the method, no change of the Hartmann screen is needed for measuring the lenses of different aperture sizes. Experimental results of aberration measurements of two lenses are given to verify the usefulness of the setup. 展开更多
关键词 TEST Scanning Hartmann test method and its application to lens aberration measurement
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