Design Method of Moment-strengthening on Tension Side When Load Un removed

Based on the linear strain distribution assumption, strain development of tensile bars and ultimate moment capacity of strengthening section, which strengthened on tension side with service load un removed, is investigated. It is showed that the higher the service load bending moment to original moment capacity ratio M 1k /M u1 is, the smaller the tensile strain of strengthening re barsis, and the more the amount of strengthening re barsis, the smaller the tensile strain of original re barsis. It also showed that,When original re bar area is relatively small and strengthening re bar area is adequate, both original and strengthening re bars may get yielded and a great increment in section moment capacity is achieved, even though the ration M 1k M u1 has a relatively high value.     

Modeling and simulation based on open electrical impedance tomography

In order to improve the error in image reconstruction caused by changeable positions of the electrodes in closed electrical impedance tomography, we propose an open electrical impedance tomography (OEIT) model using fixed electrode array. The problem was approximately assumed to be a virtual field by defining certain local sensitive area instead of solving the boundary problem in the whole electromagnetic field strictly. Modeling and simulation of OEIT have been conducted to define reasonable boundary parameters and electrode array structure. The finite element method is used for forward computation while Newton one step error reconstructor is used for image reconstruction. The target position, area and conductivity change can be reflected by the relative change of the boundary voltage and the reconstructed image is clear. Better resolution and positioning accuracy can be obtained in the shallower surface of the body by OEIT, so it is valuable in clinical applications.     

Annual Energy Consumption and Feasibility Assessment of Ground -Source Heat Pump in Residential Building in Fuzhou City

This paper describes the annual energy consumption and economic assessment of air-source heat pump(ASHP) and ground-source heat pump(GSHP),based on hourly building load of typical house in Fuzhou.Analysis results show that the energy consumption of GSHP is 15% less than that of ASHP through all year,where there is 13% less in summer and 20% less in winter.Although the seasonal energy efficiency ratio of GSHP in Fuzhou is higher than that of ASHP,it has no obvious effect on the energy efficiency as it is in the hot summer and cold winter zone.In comparison with ASHP,the GSHP is not cost-effective.     

云南稻种耐冷性状的杂种优势及配合力分析

用ＧｒｉｆｆｉｎｇⅡ等法对５个不同耐冷级别的标准品种及其配制的１４个杂交、回交组合Ｆ１进行穗部花药、颖壳和结实率等耐冷性状的细胞质效应、杂种优势和配合力分析表明：（１）强、弱耐冷性状的影响是母本基因型和细胞质效应在子代的直接表达及母子物质交换疚综合作用的结果。（２）地理远缘和耐冷性差异较大的品种间的杂交,后代杂种优势较强,尤其是丽粳２号、合系４号与十和田间的杂交组合,无论是花药大小还是结实率均较高     

An Experimental Investigation of Condensation Heat Transfer of HC600a-Oil Mixture in a Horizontal Micro-fin Tube

Experimental study of condensation heat transfer of HC600a-oil mixture in a horizontal micro fin tube is performed to investigate the inflence of oil percentage, saturated pressure and mass flux on condensation heat transfer.The empirical correlation according to this study is well correlated by the experimental data. By comparing with other refrigerants, HC600a has no inflence on ozone depletion and better heat transfer characteristcs than CFC12 and HCFC134a. It is a promising substitute for CFC12.     

Double-Face Dynamic Balance Method of Spot Rotator without Removing the Test Weights

Site dynamic balance is a important element in installation and maintenance of heavy rotary mechanism. It's hard to discharge testing weights, and the remanent weights will effect the result of balance test. The paper presents a kind of dynamic balance algorithm which need not to discharge the test weights, basing on influence coefficient. The principle of the algorithm is to balance the sum of original unbalance weights and testing weights by the result balance weights. In the algorithm , the influence coefficient of last time can be used optionally for the same rotor. Then developing a dynamic balance system building on it. The site experimental results indicates that this algorithm has a high balance precision, predigests the steps and reduces the operation time.     

Synthesis and Optimization of Cinnamic Acid Through Perkin Reaction

An improvement on synthetic procedure of cinnamic acid is made, using potissium carbonate as catalyst and PEG-400 as phase transfer catalyst. The synthetic yield is increased to 65.3% and the reaction time is shortened by optimization through comparing the quantity of potassium carbonate, molecular weight of PEG, reaction time and temperature by using the orthogonal design.     

Coupling degree analysis of stressed lap driving forces using the gray correlation technique

A new method for analyzing the coupling degree of stressed lap driving forces based on the gray correlation analysis theory is proposed. One of the surface shape displacement vectors corresponding to stressed lap driving forces is taken as the primary sequence, and the others as the secondary sequences. The sequences are pretreated by using initial value processing, and the gray correlation coefficients (GCC) of subsequences are calculated. The gray correlation degree (GCD) can therefore be obtained using the GCCs of the subsequences. According to the concept of GCD, the GCD is explained as the coupling degree of secondary sequence to the primary sequence to achieve the quantitative calculation of coupling effect between the motors placed on a stressed lap. The proposed method provides a useful tool to make deep analysis and reasonable control strategies for stressed lap control systems. A case study on the coupling degree of an active lap with diameter 420 mm, 12 drivers, and 60 micro movement sensors shows that simulating results coincide with the actual situation, which means the proposed method can accurately describe the coupling degree between various drivers of a stressed lap.     

Hybrid multiobjective particle swarm optimization and estimation of distribution algorithm

Multiobjective Particle Swarm Optimization & Estimation of Distribution Algorithm (MOPSO&EDA) is presented for solving multiobjective problem. During the process of optimization, half of offspring solutions are updated by the Particle Swarm Optimization (PSO) algorithm with mutation which has the ability of global search. Another half of offspring solutions are created by the Estimation of Distribution Algorithm (EDA) which has better ability of learning and local research. EDA explicitly extracts globally statistical information from the selected solutions and builds a posterior probability distribution model of promising solutions based on the extracted information. Compared with some other multiobjective algorithms, the Pareto Sets obtained by MOPSO&EDA have good convergence and diversity performance on ZDT1~ZDT3, ZDT6, ZDT6 1 instances, and the performance metrics of convergence and diversity on ZDT4 are moderate.     

云南光壳稻籼粳分类与形态性状的相关性研究

以程氏籼粳分类和俞履圻的变种变型分法对20份云南光壳稻品种及籼粳测验种02428、Dular进行籼粳亚种、变种变型分类,并对其形态性状进行相关分析。结果表明,20份云南光壳稻包括13个变种69个变型,以偏粳型品种占较高比例,籼粳分类品种中偏粳型品种的广亲和性较好。籼粳分类性状间及其与其他形态性状尤其是花药长度、穗下节长和株高存在极显著的相关性,推断原始的云南光壳稻的籼粳分化取决于温度,并与纬度和海拔密切相关。