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Online since: August 2013
Authors: Zhao Lu, Bao Ku Qi, Chang Fu Li, Ming Zhen Wang
Chen Xu and Wei Li are studied for construction scheme evaluation, and applied the method of value engineering to construction project scheme.
The evaluation index system To be scientific and objective evaluation on Construction Program Evaluation of Public project, establish a scientific and objective comprehensive evaluation index system is the key.
“Based on the DEA of farmhouse wall block material optimization analysis .”
Online since: March 2011
Authors: Xian Kun Meng, Ming Hui Li
Introducing Psychological Factors Paper-making Enterprises Optimal Scheduling Model MingHui Li1,a, Xiankun Meng2,b 1,2College of Electrical and Mechanical Engineering, Shaanxi University of Science & Technology, Xi’an, China aliminghui1972@126.com,bmengxiankun668@qq.com Keywords: Multi-target Incentives Psychological factors Genetic algorithm Abstract.
The process of solving the optimal scheduling problem of the papermaking enterprise's optimization can be divided into two steps: First step, to filter the actual orders in a certain period of time from all customer demanding confirm orders based on existing raw material and finished product stock condition, customer credit rating, the customer actual payment situation, and unifying enterprise's long-term productive plan; Second step , optimizating those confirmed orders to be sure productive time swich sequence.
The improvement genetic algorithm which proposed according to this article solves this order scheduling problem, the key parameter setting is: (1) Initial community number, (2) Difference distance control (3) Genetic evolution algebra (4) Inversion probability starting value P=0.8, takes generally in 0.25 (5) Variation probability starting value q=0.1, the low frequency variation may prevent in the community the important sole gene possible loss, the high frequency's variation will cause the genetic algorithm will tend the pure random searching.
Online since: October 2010
Authors: Li Fa Wang, Rui Xia Yang, Jing Feng Wu, Ying Qian Jia
A Low Phase Noise Voltage-controlled Oscillator with Harmonic Suppression Based on LTCC Technology LiFa Wang1,2, a, RuiXia Yang1,b, JingFeng Wu2and YingQian Jia1,2 1College of Information Engineering, Hebei University of Technology, Tianjin, 300130, China 2The 13th Research Institute of Chinese Electronic Technology Corporation, Shijiazhuang, 050051, China ajiyao119@gmail.com, byangrx@hebut.edu.cn Keywords: LTCC, VCO, Phase Noise, Harmonic Suppression, ansoft designer, ansoft HFSS.
The Q of VCO is a key parameter for achieving stable reference frequencies with low phase noise levels.
Substrate material is Ferro-A6, and its relative dielectric constant is 5.9, loss tangent is 0.002; Each layer substrate thickness is 94μm.
Online since: August 2003
Authors: Kunihito Koumoto, Yoshitake Masuda, Yan Feng Gao
Dielectric Characteristics of SrTiO3 Precursor Thin Film Prepared on Self-assembled Monolayers by the Liquid Phase Deposition Method Yanfeng Gao, Yoshitake Masuda, Kunihito Koumoto Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan Keywords: strontium titanate, amorphous, thin film, liquid-phase deposition method, dielectric property ABSTRACT We evaluated the dielectric properties of amorphous SrTiO3 precursor thin films in relation to the film thickness and morphology.
The intrinsic frequency dependence of material or the effects due to electrode or any internal interfacial barrier may induce such a resonance.
Koumoto, Key Eng.
Online since: December 2012
Authors: Quan Sheng Liu, Ke Duan Zhi, Run Xia He, Fang Wu, Ya Gang Zhang, Li Yang
Copper-Based Mixed Oxides Catalyst of Water-Gas Shift Reaction for Fuel Cells: The Role of Alkali Charge Keduan Zhi Quansheng Liu a Runxia He Fang Wu Yagang Zhang Li Yang Inner Mongolia Key Laboratory of Industrial Catalysis, Department of Chemical Engineering, Inner Mongolia University of Technology,Hohhot,P.R.
This is a structure weak material and was transferred to low surface area, and low intensity of solid solution, Cu1.5Mn1.5O4 and then to microcrystalline Cu and MnO, which resulted in poor catalyst activity.
Online since: August 2013
Authors: Meng Yan, Yuan Yuan, Xiang Lin Zeng, Yong Qing Yang
Research on Loading Test Scheme of Vehicular Bridge-Footbridge Combined Double-deck Cable-stayed Bridges Yan Meng a,Yang Yongqing b,Yuan Yuan c,Zeng Xianglin c School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China a511324910@qq.com, byangyongqingx@home.swjtu.edu.cn,c1009068131@qq.com Keywords: double-deck cable-stayed bridge; footbridge; vehicular bridge; loading scheme; dynamic load test; static load test; coupling effect Abstract: In order to check whether the bridge structure is in good working condition, meeting the requirements of carrying capacity and traffic capacity, loading test should be conducted to the Huiketing No.1 Bridge in Mianyang city.
These key sections should be adopted for loading test including centric loading test and eccentric loading test.
Fig.  6 Arrangement for the dynamic deflection measure point and vibration shape measure points on the vehicular bridge [cm] Conclusions As there are always considerable differences between the real structure and the theoretical calculation model in terms of material properties, structural performances and so forth, loading test is one of the most direct ways in scientific research to get a thorough comprehension on the working state of a real bridge.
Online since: September 2013
Authors: Guo Zheng Zhang, Zheng Yu Tian, Jin Jun Liu, Zhen Yu Fu, Li Li, Tao Li
Generally, lubricating grease has shorter service life than that of machinery parts[3] and overhaul cycles of many key types of equipment, such as aircraft, engine, locomotive, etc. are decided by the life of lubricating grease or oil.
Contamination concludes deposition or colloidal suspend material, polymer composites [5], outside contamination, wear debris, etc
[3] Z Xiang: Journal of naval academy of engineering, Vol.2(2005), p. 32
Online since: July 2013
Authors: Yu Mei Ding, Hua Yan, Peng Jiang, Zhen Zhang, Wei Min Yang
Simulation of Circular Tubes Fitted With V Cut and Square Cut Rotors Peng Jiang1,a, Hua Yan1,b, Zhen Zhang1,c, Yumei Ding1,d, Weimin Yang1,2,e* 1College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China 2State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China aJiangpeng8712@163.com, bYanhua999@vip.sina.com, czhangzhen81040774@163.com, ddingym@mail.buct.edu.cn, eyangwm@mail.buct.edu.cn Keywords: Rotors; Simulation; Heat transfer; Friction factor; Thermal performance factor Abstract.
All of the rotors used were made of polymer material which has a density very close to water so that rotors can almost suspend in still water, which is helpful for the automatic centering of rotors in a tube.
Online since: February 2012
Authors: Xiao Wei An, Yu Jie Ji, Fu Gang Wang
Dynamics Simulation of Banana-type Line Vibrating Screen and Analysis of Applied Force of Fastenings Xiaowei An1,a, Fugang Wang2,b,Yujie Ji3,c 1,2College of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China aemail:anxiaowei18@163.com, bemail:wwwfffggg1007@126.com,cemail:syjyj@126.com Keywords: Vibrating screen; Dynamic Simulation; Amplitude.
Production efficiency of vibrating screen and screening level immediately influence on its development; and the banana-type line vibrating screen (BLVS), whose dynamics parameters directly impact the screening operations, serves as a key equipment of screening material.
Online since: October 2012
Authors: Jin Hua Wang, Jin Shan Zhang
Specification of turbulent diffusion by random walk method for oil dispersion modeling Jin-Hua Wang1, 2a, Jin-Shan Zhang1, b 1State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210024, China 2Institute of Severe Weather and Climate, School of Atmospheric Sciences, Nanjing University, Nanjing, China awjh6610@163.com, bzhangjinshan@vip.163.com Keywords: Oil spill modeling; random walk; diffusion Abstract.
The total probability of finding a particle over a rangeis then approximately, the material contained within this range would be, from which the concentration distribution is (4) If we suppose that the particles suffer n displacements per unit time; then and becomes a kind of ‘diffusion velocity’, define diffusivity , we can transform equation into (5) This is exactly the one-dimensional diffusion from the classical diffusion equation, a Gaussian distribution with standard deviation.
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