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Real-Time Assessment and Diagnosis of Process Operating Performance
Shabnam Sedghi,Biao Huang
Engineering 2017, Volume 3, Issue 2, Pages 214-219 doi: 10.1016/J.ENG.2017.02.004
Over time, the performance of processes may deviate from the initial design due to process variations and uncertainties, making it necessary to develop systematic methods for online optimality assessment based on routine operating process data. Some processes have multiple operating modes caused by the set point change of the critical process variables to achieve different product specifications. On the other hand, the operating region in each operating mode can alter, due to uncertainties. In this paper, we will establish an optimality assessment framework for processes that typically have multi-mode, multi-region operations, as well as transitions between different modes. The kernel density approach for mode detection is adopted and improved for operating mode detection. For online mode detection, the model-based clustering discriminant analysis (MclustDA) approach is incorporated with some a priori knowledge of the system. In addition, multi-modal behavior of steady-state modes is tackled utilizing the mixture probabilistic principal component regression (MPPCR) method, and dynamic principal component regression (DPCR) is used to investigate transitions between different modes. Moreover, a probabilistic causality detection method based on the sequential forward floating search (SFFS) method is introduced for diagnosing poor or non-optimum behavior. Finally, the proposed method is tested on the Tennessee Eastman (TE) benchmark simulation process in order to evaluate its performance.
Keywords： Optimality assessment Probabilistic principal component regression Multi-mode
Evaluation on Fire Prevention Performance of Glass Wall
Zhang Qingwen,Zhang Heping,Yang Yun,Yao Bin,Yang Jianpeng
Strategic Study of CAE 2005, Volume 7, Issue 12, Pages 83-87
The application of large quantities of glass wall in modern buildings challenged fire safety design, verification and acceptance. Regulations of glass wall in traditional fire code were analyzed and its advantages and disadvantages were summarized in this paper. By using performance-based fire safety design concept, fire prevention performance evaluation of glass wall was studied. Performance criteria and heat transition calculation method were put forward, and an example of evaluation of glass wall in an exhibition center was showed. The result of evaluation would provide reference to fire safety design, verification and acceptance.
Keywords： glass wall fire prevention performance-based evaluation
Performance Analysis and Evaluation of Geometric Parameters in Stereo Deflectometry Article
Yongjia Xu, Feng Gao, Xiangqian Jiang
Engineering 2018, Volume 4, Issue 6, Pages 806-815 doi: 10.1016/j.eng.2018.10.007
This paper presents a novel geometric parameters analysis to improve the measurement accuracy of stereo deflectometry. Stereo deflectometry can be used to obtain form information for freeform specular surfaces. A measurement system based on stereo deflectometry typically consists of a fringe-displaying screen, a main camera, and a reference camera. The arrangement of the components of a stereo deflectometry system is important for achieving high-accuracy measurements. In this paper, four geometric parameters of a stereo deflectometry system are analyzed and evaluated: the distance between the main camera and the measured object surface, the angle between the main camera ray and the surface normal, the distance between the fringe-displaying screen and the object, and the angle between the main camera and the reference camera. The influence of the geometric parameters on the measurement accuracy is evaluated. Experiments are performed using simulated and experimental data. The experimental results confirm the impact of these parameters on the measurement accuracy. A measurement system based on the proposed analysis has been set up to measure a stock concave mirror. Through a comparison of the given surface parameters of the concave mirror, a global measurement accuracy of 154.2 nm was achieved.
Keywords： Optical metrology Error analysis Stereo deflectometry Three-dimensional shape measurement Performance evaluation Simulation
Nondestructive Testing Method to Assess and Detect Road Performance
Guo Chengchao,Xu Pengfei and Zhong Yanhui
Strategic Study of CAE 2017, Volume 19, Issue 6, Pages 72-79 doi: 10.15302/J-SSCAE-2017.06.011
At present, China is faced with major problems in infrastructure management, such as improper scheduling and belated implementation of maintenance work or huge maintenance budget outlays. As such, it is essential to implement rapid and effective management measures to ensure road safety, prevent catastrophic damage, and increase economic growth. In this paper, five nondestructive road testing methods and their associated testing equipment are introduced according to the American Society for Testing and Materials. These include the falling weight deflectometer, ground penetrating radar, macro texture depth, international roughness index, and spectral analysis of surface waves. The operating principles and applications of each testing method are elaborated to guide relevant personnel to make a reasoned choice according to their actual situation. The application of these testing methods will accelerate the assessment of projects without traffic closures, likely provide a new approach for establishing a high-efficiency intelligent road network monitoring system, and will provide a practical and feasible method for sustainable road development and the efficient utilization of capital.
Keywords： road detection road defects nondestructive testing
Chen Mao,Lu Shi
Strategic Study of CAE 2013, Volume 15, Issue 4, Pages 57-61
This paper introduces the development of performance-based method (PBM) for seismic design and evaluation of nuclear safety related structure in nuclear power station in U. S., and systematically explains and discusses the PBM. Based on the updated research and available standards and codes, the main content of PBM includes following 5 aspects: Category of systems structures and components(SSC) according to different performance goal, Determination of performance goal of SSC, determination of seismic input based on PSHA, Fragility Analysis of SSC, and ensure sufficient conservatism of fragility safety to reasonably achieve target performance goal. This paper also gives some recommendations on the research and development of PBM in the future.
Keywords： nuclear power plant nuclear safety system structure and component performance-based seismic safety fragility
Multi-focus image fusion based on fully convolutional networks Research Articles
Rui Guo, Xuan-jing Shen, Xiao-yu Dong, Xiao-li Zhang,zhangxiaoli@jlu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 7, Pages 963-1118 doi: 10.1631/FITEE.1900336
Keywords： 多焦距图像融合；全卷积网络；跳层；性能评估
Analysis and research for risk assessment criteria of underground engineering
Yao Xuande,Wang Mengshu
Strategic Study of CAE 2009, Volume 11, Issue 7, Pages 86-91
In this paper, the characteristics of underground works and constructive guidelines for risk assessment of underground works were intro.The results of the research were successfully applied to the study of the Beijing Municipal City Planning and Design of the underground road system.
Keywords： underground engineering risk assessment criteria
A Review on the Risk Assessment Methods of System Engineering
Cao Yun,Xu Weiya
Strategic Study of CAE 2005, Volume 7, Issue 6, Pages 88-94
A comprehensive introduction about present situation and future development of the risk assessment methods for systems engineering is presented. The advantages, shortcomings and the application scope of these methods are narrated. Several technical issues on the research of the risk assessment methods are discussed. At last, questions to be settled and the future research direction about them are proposed.
Keywords： risk assessment risk analysis systems engineering
Research of trust valuation based on cloud model
Lu Feng,Wu Huizhong
Strategic Study of CAE 2008, Volume 10, Issue 10, Pages 84-90
At present, the existing descriptions of trust by trust valuation models lack comprehensiveness. To solve this problem, this paper discusses the co-existence and integration of fuzziness and randomness of trust relation, analyzes the ways cloud models describe uncertain concepts and the algorithms cloud models transform between qualitative concepts and their quantitative expressions, and presents trust cloud, a trust evaluation model based on cloud theory. This model provides the algorithms of trust information transfer and combination described by digital characteristics. While describing accurate trust expectation, this model portrays the uncertainty through entropy and hyper entropy. Compared with traditional trust valuation models, trust values obtained in this model contains more semantic information, indicating that valuation results from the model are more suitable as evidence for decision-making on trust.
Keywords： trust valuation trust model cloud model cloud generator
Anti-sliding safety assessment for main saddle on middle tower of Taizhou Bridge
Ruan Xin,Ruan Jing,Chen Airong and Guo Ji
Strategic Study of CAE 2012, Volume 14, Issue 5, Pages 71-74
In this paper, the basic model of main cable slip between saddles is established. Three methods to assess the safety of saddle sliding on middle tower of the Taizhou Bridge are presented based on this model. The first assessment method is deterministic, which is based on live load model of design codes. Several design codes models are used, and assessment results are compared. In the second method, the uncertainty of traffic load is considered in a more accurate way. Random traffic flow simulation model is developed to simulate real traffic situation on the bridge. Extreme value of unbalance force is obtained by extrapolation methods based on Rice formula. The last assessment method is probabilistic based method.The probabilistic model of load effect and structure resistance is established, and reliability index of anti-sliding safety is calculated. All three assessment results indicate that the middle tower saddle of the Taizhou Yangtze River Bridge is safe and reliable.
Keywords： three-tower two-span suspension bridge middle tower saddle deterministic assessment probabilistic assessment
Amultimodal dense convolution network for blind image quality assessment Research Article
Nandhini CHOCKALINGAM, Brindha MURUGAN
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 11, Pages 1601-1615 doi: 10.1631/FITEE.2200534
Keywords： No-reference image quality assessment (NR-IQA) Blind image quality assessment Multimodal dense convolution network (MDSC-Net) Deep learning Visual quality Perceptual quality
The Application of Risk Matrix to Acquisition Risk Evaluation for Weapon and Equipment
Li Zhongmin,Wei Yiming,Tang Shuchun,Chen Jian
Strategic Study of CAE 2006, Volume 8, Issue 6, Pages 95-99
Risk evaluation is the basis of acquisition management for weapon and equipment. Based on the totally analyzing and summarizing risk matrix widely used abroad, the paper firsdy discusses the application of risk matrix in acquisition risk evaluation for weapon and equipment in China. Then, the paper, beginning with the two rules of risk impact and risk probability, demonstrates risk evaluation of a type of weapon and equipment as a case study, thus lays a basis for the scientific and rational risk management decision making.
Keywords： risk matrix risk evaluation acquisition for weapon and equipment
Review on the marine radioactive-pollution monitoring and assessment technology
Chen Liqi,He Jianhua1,Lin Wuhui,YuWen, MenWu
Strategic Study of CAE 2011, Volume 13, Issue 10, Pages 34-39
To review the marine radioactive-pollution monitoring and assessment technology, the sources and components of marine radioactivity were introduced; the development on the methods of marine radioactivity analysis and the technology of monitoring network were appreciated, and the possibility and importance on building the methodologies of non-human species radiation protection and assessment were discussed, including the assessment of marine radioactive-pollution. Some advice for developing marine radio-monitoring technology in China was proposed at last.
Keywords： radioactive-pollution monitoring technology and network assessment ocean
The estimation for state of cable based on improved Weibull distribution model
Zhang Tieyan,Wang Chengmin,Sun Qiuye,Zhang Huaguang
Strategic Study of CAE 2008, Volume 10, Issue 10, Pages 42-46
The estimation for state of cable is significant to state of cable management. The famous methods for state estimation of cable are Weibull distribution model and Arrhenius method. The two methods are analyzed and researched. A method for measurement of Arrhenius model activation energy is presented. And the Weibull distribution model is used for state estimation of cable. The simulation based on overhaul data, test data and monitor data of the cables for Arrhenius model shows the effectiveness of the approach.
Keywords： cable state estimation Arrhenius model Weibull distribution
Discussion on safety risk assessment of shield construction in underwater tunnel
Lu hao,Shi Yehui and Rong Xiaoli
Strategic Study of CAE 2013, Volume 15, Issue 10, Pages 91-96
With the unceasing development of the traffic tunnels in subway and highway engineering, sometimes the tunnels pass through rivers or lakes, so slurry shield method with large diameter is often used in the underwater tunnel construction. The underwater tunnel with large diameter has the characteristics of high risk, difficult to control, more uncertain risk factors, which will cause greater risk in construction process. Risk assessment is more and more applied in underwater tunnel construction safe management. The characteristics of using slurry shield with large diameter in underwater tunnel were introduced in this paper, and the mechanism that how the characteristics arouse the increase of risk was analyzed. According to the disadvantages of previous risk assessment methods, an improved index method was put forward, and the assessment process and main calculate model of this method were given. This method has been used in an underwater tunnel in Nanjing subway engineering, the application results show that this method can adapt the dynamic change of risk factors and it can be better applied in underwater tunnel construction safety risk assessment.
Keywords： underwater tunnel safety risk dynamic assessment
Title Author Date Type Operation
Real-Time Assessment and Diagnosis of Process Operating Performance
Shabnam Sedghi,Biao Huang
Journal Article
Evaluation on Fire Prevention Performance of Glass Wall
Zhang Qingwen,Zhang Heping,Yang Yun,Yao Bin,Yang Jianpeng
Journal Article
Performance Analysis and Evaluation of Geometric Parameters in Stereo Deflectometry
Yongjia Xu, Feng Gao, Xiangqian Jiang
Journal Article
Nondestructive Testing Method to Assess and Detect Road Performance
Guo Chengchao,Xu Pengfei and Zhong Yanhui
Journal Article
Preliminary application study of performance-based method for seismic design and evaluation of nuclear safety related structure in nuclear power station
Chen Mao,Lu Shi
Journal Article
Multi-focus image fusion based on fully convolutional networks
Rui Guo, Xuan-jing Shen, Xiao-yu Dong, Xiao-li Zhang,zhangxiaoli@jlu.edu.cn
Journal Article
Analysis and research for risk assessment criteria of underground engineering
Yao Xuande,Wang Mengshu
Journal Article
Anti-sliding safety assessment for main saddle on middle tower of Taizhou Bridge
Ruan Xin,Ruan Jing,Chen Airong and Guo Ji
Journal Article
Amultimodal dense convolution network for blind image quality assessment
Nandhini CHOCKALINGAM, Brindha MURUGAN
Journal Article
The Application of Risk Matrix to Acquisition Risk Evaluation for Weapon and Equipment
Li Zhongmin,Wei Yiming,Tang Shuchun,Chen Jian
Journal Article
Review on the marine radioactive-pollution monitoring and assessment technology
Chen Liqi,He Jianhua1,Lin Wuhui,YuWen, MenWu
Journal Article
The estimation for state of cable based on improved Weibull distribution model
Zhang Tieyan,Wang Chengmin,Sun Qiuye,Zhang Huaguang
Journal Article
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