Tian X.M.,China University of Petroleum - East China |
Chen G.Q.,China MCC20 Group Co. |
Cao Y.P.,China University of Petroleum - East China |
Chen S.,University of Southampton
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2011
A unified framework based on the dynamic principal component analysis (PCA) is proposed for performance monitoring of constrained multi-variable model predictive control (MPC) systems. In the proposed performance monitoring framework, the dynamic PCA based performance benchmark is adopted for performance assessment, while performance diagnosis is carried out using a unified weighted dynamic PCA similarity measure. Simulation results obtained from the case study of the Shell process demonstrate that the use of the dynamic PCA performance benchmark can detect the performance deterioration more quickly compared with the traditional PCA method, and the proposed unified weighted dynamic PCA similarity measure can correctly locate the root cause for poor performance of MPC controller. © 2011 IFAC.
Zhang J.-S.,China Mcc20 Group Corporation |
Cao Y.,China Mcc20 Group Corporation |
Gao Y.-F.,China Mcc20 Group Corporation |
Wang C.-Y.,China Mcc20 Group Corporation
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014
The successful experience of diaphragm wall and internal bracing system for deep foundation pit in deep silt layer is introduced. Some technical measures for construction of diaphragm wall, dewatering and soil excavation are discussed. In the construction, the monitoring technology and advanced information technology are emplyed to ensure that the construction of the foundation pit is in a controlled state. The design and construction experience has certain reference meanings for the construction of deep foundation pits in the region.
Lai Y.,Xi'an University of Architecture and Technology |
Li Y.,China MCC20 Group Corporation ltd
Applied Mechanics and Materials | Year: 2013
Collaborative competition between manufacturers and monopoly supplier is a game relationship, which is very complicated. It involves many factors, both collaborative management relations, and there is competition between non-cooperatives. The enterprise core ability in the relationship is the research variables of the analysis. Meanwhile, it is necessary to establish a negotiation model, but because the quantization of core competence has a certain degree of difficulty, to quantify and measure the bargaining power is very difficult. Quantification of core competence and bargaining power are to be further analyzed and researched. © (2013) Trans Tech Publications, Switzerland.
Lai Y.,Xi'an University of Architecture and Technology |
Wang X.-J.,Xi'an University of Architecture and Technology |
Xie X.-H.,China MCC20 Group Corporation Ltd.
Proceedings of 20th International Conference on Industrial Engineering and Engineering Management: Theory and Apply of Industrial Engineering | Year: 2013
Bidding is the main transaction way in construction market, however, since the bidding system was establish, it has been a big problem plaguing managers how enterprise can win in the tender, and obtain long-term development. This paper thought that the process through the bidding operating mode under which construction enterprises get development and evolution is a standard model of CAS. To simulate the bidding in the market in our country, this paper analyzed the interaction between organizations, defined its characteristics, and built a complex adaptive system. Then through the time flow and in the direction of the application of evolutionary game theory, the paper studied the behavior and relationship between agents. Finally, the paper selected a specific sub-behavior as the focus, looking for the reason behind the behavior of promoting application of equilibrium theory. © Springer-Verlag Berlin Heidelberg 2013.
Zhuang D.-D.,Jiangsu University |
Wang Z.-C.,Shandong University |
Wang L.-G.,Jiangsu University |
Huang Y.,Jiangsu University |
And 3 more authors.
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2015
Deformation law of a aluminum killed low-carbon steel sheets during reversely cold rolling process was studied by copper wire fixed-point notation. Microstructure and properties of cold rolled and annealed steel sheets with different reduction ratios were investigated by means of OM, EBSD and tensile test. The results show that shear stress and shear deformation don't occur obviously with increasing reduction ratios. Deformation behavior in surface and center layer of the steel sheets is compressed deformation. As cold rolling reduction ratios increase from 34% to 80%, r value is between 1.13-1.36 and n value is between 0.23-0.24. As reduction ratios increase from 64% to 80%, <111>//ND grains are always dominant, <001>//ND and <112>//ND grains are consumed and transformed into <110>//ND grains in cold rolling organization. After annealing, <111>//ND grains are more dominant obviously in the steel sheets with 80% reduction ratios, and it is good for deep draw ability of the steel sheets. © 2015, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.
Feng Z.,China MCC20 Group Corporation Ltd. |
Gao Y.,China MCC20 Group Corporation Ltd. |
Qi W.,Institute of Engineering Mechanics |
Wang C.,China Earthquake Administration
World Information on Earthquake Engineering | Year: 2013
Two typical real deep engineering sites were selected as calculation models, which all belong to type-III site. A seismic acceleration time history was chosen as original input motion, it was scaled until its peak value got 25Gal, 50Gal, 100Gal, 150Gal, 200Gal, 250Gal, 300Gal, 350Gal and 400Gal respectively. One-dimensional equivalent linearized wave motion method for soil layers was used to study the influence of round motion intensity on the amplification factors, fundamental periods, characteristic periods and platform value of the deep site and the change relation of fundamental period and characteristic periode of the site. The results show that, as the intensity of input motion increases(1) the amplification factors of acceleration peak values decrease and platform values increase while(2) there are a good linear relationship between site fundamental periods and characteristic periods of design spectra, (3) the characteristic periods of design spectra may exceed greatly the values given by the seismic code. In order to ensure the seismic safety of the buildings, the effect of ground motion intensity on the characteristic periods of design response spectra of the deep sites must be considered.
Yang Y.S.,Shandong Jiaotong University |
Yi X.,China MCC20 Group Corporation |
Hu P.,Shandong Jiaotong University |
Dong Q.,Shandong Jiaotong University
Advanced Materials Research | Year: 2011
Aiming at the service performance characteristics of cement concrete pavement, this paper puts forward optimized design concept for groove parameters of cement pavement. Single groove parameter optimal choice is systematically analyzed based on integrated service quality of cement pavement. Through a variety of multi-contrast laboratory tests and theoretical analysis, from three aspects of anti-slide, strength, and noise reduction, optimized design scheme of groove parameters are demonstrated and proposed, and groove parameters and form suitable for environment characteristics in seasonal frozen region are given. © (2011) Trans Tech Publications.
Shi Z.,Xi'an University of Technology |
Li Y.,China MCC20 Group Corporation Ltd |
Yang Z.,Xi'an University of Technology |
Gu Q.,Xi'an University of Technology
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2014
Construction projects are often quite complex with a lot of uncertainty about the required duration. For a project planner, it is important to ensure project completion within the deadline. In the construction environment, the activity time can be seen as a random variable, so the project duration can also be seen as a random variable. It is rather complicated to obtain the probability distribution for project duration using analytical or numerical methods, while simulation through a large number of samplings can only produce an approximate solution. Therefore, this research proposes the double paths BP neural networks evaluation technique. The neural network model can reduce the amount of calculation in estimating project duration and obtain a speedier solution than PERT. The results of applying the neural networks developed from this research to estimating the mean duration and the duration for a given confidence level for two project cases show that they can achieve a mean absolute percentage errors within 1.5%.
Zeyun S.,Xi'an University of Architecture and Technology |
Yong L.,China MCC20 Group Corporation Ltd |
Qinghua G.,Luoyang Luanchuan Molybdenum Industry Group Inc.
Advances in Information Sciences and Service Sciences | Year: 2012
In view of the request of wireless accurate position of workers and equipments, the characteristics of wireless signal transmission and position have been analyzed. Based on the Two Way Arrival and Symmetric Double Sides Two Way Arrival, a multi-Access points Centroid wireless Localization algorithm of area was designed in this paper. And The simulation shows that this algorithm performance is stable, reduces the spread and a range of error by NLOS and can improve the degree of wireless Localization accuracy in underground.