The Generalized Conjugate Direction Method for Constrained Optimization A Geometrical Approech

The conjugate direction method for solving the unconstrained optimization problem is extended to solving the constrained optimization problem by method of differential geomtry.By inducing a new class of affine connections on a constrained sub-manifold, the primary constrched optilnhation problem is converted to a unconstrained local quadratic programming problem.Based on the definition and construction of a new class of generalized conjugate directions, it isproved that optimum value of the primary constrained optimization problem must be located on thegeodesic line which is formed by the conjugate directions mentioned above and can be reached withinfinite searching step. Therefore a new curve search algorithm with generalized conjugate directions isput forward.     

Fuzzy Comprehensive Evaluation of Human Thermal Comfort

The human thermal comfort is influenced by many factors, and it is fuzzy, so it is a kind of stochastic fuzzy variable. So the evaluation of human thermal comfort is fuzzy also. and the method assessing the human thermal comfort with fuzzy mathematics is reliable. The factor affecting the human thermal comfort is analysed and predigested. Based on the analysis above,the methodology of assessing the thermal comfort is presented. The methodology resolves the decision_making continuum, so it lightens uncertainty of traditional method. The simulation results are compared with the Predicted Mean Vote index, and they are in good agreement. The study shows that the methodology of assessing the thermal comfort is reliable,and it presents a new approach for studying the human thermal.     

Uncertainty Analysisof Financial Evaluation of Investment Project and Its Application

The economy index used in investment project is usually influenced by many uncertain factors because the basic data of which comes from forecast and budget. This paper studies such common uncertain analysis method as balance analysis of profit and loss, sensitivity analysis. The problems in these methods are pointed out and a new method of uncertainty analysis based on the Analytic Hierarchy Process and Monte Carlo method is advanced, along with its compute method in economy analysis of investment project. To an investment project, the authors set the NPV as the goal, set investment amount, prosecution cost and product price as the simulant values, which have relatively great effect on NPV. By using the new method in uncertain analysis, the conclusion can be drawn that the project is greatly influenced by the uncertain factors of future and it has high risk. A case study demonstrates that the new method can synthetically analyze the financial variety caused by uncertain factors.     

基于深度卷积神经网络的储粮害虫图像识别

[目的]为了防治储粮害虫带来的危害,借助计算机对储粮害虫进行有效的图像识别是具有重要意义的。[方法]针对基于图像的储粮害虫多分类识别问题,引入了基于深度卷积神经网络的储粮害虫图像识别方法。该方法与传统的储粮害虫识别方法相比,大幅度简化了数据预处理过程,[结果]同时该方法在识别精确度方面达到了97.61%,也明显优于传统方法。[结论]因此基于深度卷积神经网络的储粮害虫识别方法具有较高的实用性,且具有进一步研究和推广的意义。     

A BOUNDARY ELEMENT METHOD WITH LOWER-ORDER SINGULARITY

In this paper, a lower-order singular BEM based on original BEM is presented by introduccing a new variable of angle. In the new method, kernel of force is the same as kernel of displacement which is only singularity of InR ( R is the distance between a source and a field point ) . Hence, it results in a new BEM formulation, whose singularity is lower than that of the original BEM formulation. What's more, in calculating stress, it eliminates the boundary-layer effect in the main. A software which is based on lower-order singular formulation is used to analysis the bar of 300T coiningmachine, its result is coincident with that obtained by the original BEM and photo-elastic experiment.     

A static equilibrium method for tension identification of in-service cable

To identify the tension of in-service cable expediently and accurately, a cable tension identification method based on static testing measures is proposed by taking cable stress stiffening effect and principle of static equilibrium into account. According to the analysis on the process of cable tension identification and the key technique, a new compound clamp type with the soft metal lining is proposed. The rule of the contact distortion evolvement between the clamp and the cable is analyzed by dynamic nonlinear explicit analysis method, and the law of the friction change following the clamping force is studied. Thus, the reasonability and feasibility of this method is theoretically illuminated. The identified tension only depends on the displacement of load application point and the load force. The proposed method avoids the drawback of normal cable measuring methods where the measuring accuracy is greatly affected by cable boundary conditions and values of material parameters. The tension measured in the method is only related to the displacement of force point and the value of force. Therefore, it provides a new idea for cable tension identification of flexible cable.     

Review and Verification of Warping Theory by Computer

The stress and deformation of thin-wall beam formed structure is calculated by "movable coordinate method" of warping theory on computer. By comparison with the classical theory of thin-wall structure, it is proved that the new theory is correct and the results are credible. On this basis, the advantage of this method and the future of its application are reviewed.     

INDUSTRICAL OPTIMAL REGULATOR ADJUSTMENT

This paper presents a new practical method for PI or PID industrial regu-lator optimal adjustments.This method is well feasible for off-line theoreticaladjustment of a control system and provided for closed loop identification withon-line regulator tuning.The proposed algorithm is based on approximationinversion of s-domain disturbance property of a control system by shiftedChebyshev's series.The PI or PID regulator parameter optimization usings-domain approximation representation of time-domain performance index of acontrol system is exclusively discussed with an example of using the algorit-hm.The introduced method is proved convenient to industrial process withhigh-order mathematical model.And it has both theoretical and engineeringsignificance.     

OPTIMAL REACTIVE POWER FLOW BY SENSITIVITY METHOD

A new approach based on sensitivity method for the optimal power flow is presented in the paper. This method has the following advantages: it is suitable to solve a 200-node power system on the microcomputer; the convergence is easy to reach and the computation speed is quick; it is possible to reduce 8-14% power loss and to get maximum economic benefit by using this method; in power system dispatch center it can be used as an on-line voltage and reactive power control program to keep good voltage level. The proposed method has been proved successful by IEEE 118-node test system and the several real power systems such as 49-node, 61-node, 99-node and 200-node systems.     

FUZZY DISCERNMENT METHOD FOR WALL CLASSIFICATION IN AIR CONDITION LOAD CALCULATION

The building cold and hot loads calculation method for design-ers is spread and used in our country.There are total 301 kinds of commonwalls and roofs,which are classified as 6 types respectively.The cold loadtemperature tables are compiled for designers.With the development of build-ing science,there will be many new types of wall construction without classi-fication.This is inconvenient for fhis new calculation method to be spread.Inthis paper,a new method of wall classification is developed according to theprinciple of fuzzy colony discernment.We have got satisfactory result in com-parison with the result gained by load calculation method.This method invo-lves only algebra calculation and comparison calculation,such as taking bigger,taking smaller etc.,so it is simple and easy for designers to use.     

A NEW METHOD BY USE OF MASS AND ACCELARATION PARAMETERS FOR BALANCING THE SHAKING MOMENT OF ARTICULATED MULTI-BAR LINKAGES

In this paper,a new method with general purpose ispresented for balancing the shaking moment of articulated multi-barlinkage.The concept of this method is clear.The moment equation oflinkages is easy to establish and solve.Furthermore its pattern structuremakes it convenient to be programmed.     

A General Method for the Initial Values for Two-Sided Iteration

In the study on finding a group of inital values for solving operator equation x=G(x)by the two-sided iterative method,some stronger conditions forG(x)have been demandedand some new parameters have to be introduced since 1978,But,as it will be proved in this paper,Itis unnecessary to use any new parameters and other stronger conditions to get a group of initial val-ues of two-sided iterative, as those initial values can be obtained by means of an auxiliary iterativebeginning with operator G(x)itself. The numerical example in this paper illustraves that the methodproposed in this paper is a general method.     

DTOPSIS法在亚麻新品种评价中的应用初探

为了更加准确地、有效地对亚麻新品种进行综合评价,此文以2004~2005年度云南省亚麻区域试验汇总资料为分析材料,应用DTOPSIS法对区试的10个亚麻新品种的各性状进行了综合评价,同时与传统单纯产量评价进行对比,结果表明：采用DTOPSIS法综合评价 值排序结果比单纯产量排序结果有所不同,但DTOPSIS法分析更为合理,它在全面评价亚麻品种的综合性状方面具有更好的应用价值。此外,该文还对DTOPSIS法在亚麻品种进行综合评价中有关问题进行了讨论。     

棉纤维品质长度的图像测量

提出了一种新的棉纤维品质长度的检测方法。该方法主要通过使用CCD、计算机、高亮度光源构成的精准测量系统而实现,它能够准确测量Hertel曲线上任意一点的纤维累积根数。基于随机分布理论,建立了纤维长度分布的数学模型,实现了对主体长度以上纤维各个长度进行分段测量。实验表明,本方法的测量结果与Y111结果高度相关,测量速度快。     

Parameters design of powertrain system of electric vehicle with two-speed gearbox

The Brilliouin optical time domain analysis (BOTDA) is a newly developed technique adopted to measure and monitor the strain and temperature generated along optical fibers. The BOTDA has the characteristics of distributed measurement, long distance, high precision and durability, so it is suitable to structural health monitoring. Then a new optical fiber sensor embedded method based on air-blowing and vacuum grouting is introduced. It can lay the long distance distributed optical fiber into the concrete easily in short time. An experiment has been set up to study the validity of the new method, which shows that the embedded optical fiber can measure the concrete strain accurately, and it can realize the comprehensive, long-term, stable and real-time health monitoring to the civil structure.     

INFORMATION THEORY COMBINATION FOR ERROR ANALYSIS OF. SAMPLING-QUANTIZATION FOR DIGITAL MEASUREMENT SYSTEMS

This paper presents a new error analysis method based on the information theory. The analyse results of error of a digital measurement system will be illustrated more reasonably. This method is defined information theory combination, it will overcome the unintention between the uncertainty and the standard error of measuring results by traditional error analysis. On the basis of error spectrum analysis of sampling and quantization, an optimum digital filtering method is also presented in this paper. Simulation and testing show that the method is more resultful.     

油脂碘值的快速测定

报道了一种测定油脂碘值的新方法，不改变Hanus法操作步骤，只需在测定过程中加入催化剂醋酸汞。与Hanus法测定碘值相比，测定反应时间由30分钟缩短为4分钟，且本法相对误差小于0．5％，变异系数小于0．2％。     

Numerical Analysis on the Modified Model to the Dynamic Strength of Defective Concrete Beam

By improving the traditional digital concrete modeling method, the new defective concrete model was established. Three cases were simulated based on this model. The influence of initial defectiveness on the dynamic strength was investigated. The result shows that: 1) At initial stage, the influence of the initial defectiveness on the dynamic strength becomes more obviously with the increasing of the loading speed; 2) Regardless of the same loading speed, the influence becomes less obviously when the load reaches the strength point of the concrete; 3)The simulation result is compared with the test result, and it is deduced that the new model has higher computational accuracy and the result is more rational, and it can take the place of the traditional digital concrete model in practice.     

快速测定烟草及烟草制品中石油醚提取物总量

为提高烟草石油醚提取物含量的测定效率,介绍了一种快速测定烟草及烟草制品中石油醚提取物总量的方法。利用设计加工的直接萃取装置来提取烤烟、白肋烟和香料烟等3种烟叶11个样品中的石油醚提取物总量,与行业标准中的方法进行比较。结果表明:①旧方法测定1个样品需要14h以上,而新方法只需5.5h;②新方法的RSD小于或略大于1%;③新方法与标准方法的测定结果的相对偏差小于2.13%。该方法适合烟草石油醚提取物的快速测定。     

改进遗传算法在饲料配方设计中的应用

针对现有饲料配方软件的局限性,以白绒山羊饲料配方为例,提出一种基于改进遗传算法的求解方法。与标准遗传算法相比,采用随机联赛选择替代轮盘赌模型,优化了选择策略;采用不同的随机数交叉和高斯变异,改进了交叉算子与变异算子。测试结果表明,该方法具有良好的运算效率,拓宽了搜索空间,提高了对重点区域的搜索能力,降低了成本,为复杂问题的优化提供了一种新的思路。