Two Optimization Methods for Portfolio Investment Decision

On the basis of introducing some fundamental theories and computational methods of portfolio investment, this paper derives a decision model for searching optimal portfolio with the utility function. Then,after comparing the new model with the conditional extreme optimization model,which has been usually considered by people,the result shows the new model would be more efficient under certain conditions.     

A Further Study on Two-sided Interval Relaxation Method

An interval relaxation method to solve system of nonlinear equations is discussed in this paper.The conditions is weaker than the related reference.But the conclusion is thesame.Besides,two sufficient conditions are given for the existence of solutions.A speed comparasiontheorem is prsented,too.Finally,an illustrative example is also given.     

Optimization of an Inoculation Method for Cotton Alternaria Leaf Spot

[Objective] Cotton Alternaria leaf spot disease causes serious damage during cotton production. The aim of this study was the optimization of an inoculation method for cotton Alternaria leaf spot. [Method] An Alternaria alternata spore suspension was used as the inoculum. Three inoculation methods were tested and compared: smearing with spores plus retaining moisture using a sealed plastic bag; smearing with spores plus retaining moisture by intermittently spraying with water; and spraying spores plus retaining moisture by intermittently spraying with water. [Result] Inoculated cotton leaves were most readily infected by smearing with spores plus intermittently spraying with water. This inoculation method was effective for distinguishing resistant cotton cultivars from susceptible ones, but often caused nonuniform disease lesions on cotton leaves; thus, the incidence of diseased leaves was random and somewhat nonuniform. Spraying spores plus retaining moisture by intermittently spraying with water led to a relatively longer disease pathogenesis and slower disease progression; however, the incidence of diseased leaves was relatively consistent and uniform, thus providing repeatable inoculation experimental conditions compared with the other two inoculation methods. [Conclusion] Spraying spores plus retaining moisture by intermittently spraying with water is a suitable inoculation method for studying cotton resistance to Alternaria leaf spot.     

Multiple Layer BP Neural Network for Fuzzy Calculating

The FCBP(Fuzzy calculating BP) algorithm which is proposed by this paper hasovercome the sensitivity for samples,reduced the number of input layer's samples,lightened the burden of input layer.it is suitable to fuzzy inference and pattern recognition.     

A Study on the Mathematical Models for Two Dimensional Guillotine Cullting-stock

Based on the analysis and study on some existed models for two-dimensional Guillotine Cutting-Stock problem, it is pointed out that some kinds of the models may miss some good cutting patterns,and some may result in inadequate solutions because of only considering the patterns with the smallest waste. A kind of revised two-dimensional cutting-stock models are developed,which transform the two-dimensional problem into the one-dimensional one using the dimension-decreasing heuristic method and whose initial patterns are considered comprehensively. In this kind of models, not only the least waste,but also the other constraints,such as the demands and the relative area of the order plates are considered.     

The Optimization Design for the Parameters of Capacitor Welding

Through the analysis in this paper,the optimum relation of the discharging current peak interval t m ,the discharging loop equivalent inductance L and equivalent resistance R is obtained.This paper analyze the original discharging loop equivalent inductance L ,which provides an effective method for adjustment and selection of inductance L to realize the optimization energy saving design of the welding machine.     

A Synchro-Solution Method for Generalized Eigenproblem and its Application in Parameter Sensitivity Analysis

A high efficient synchro-solution method for generalized eigenproblem has beenproposed ,it has also been demonstrated that how the method can be used in vibration parameter sen-sitivity analysis of the higher order non-self-adjoint vibration system such as rotor-journal bearing system.     

A New Systematic Approach for Building State Equations

In this paper, the concept of hybrid variables is introduced. First hybrid equations are built and then,state equations are obtained by eliminating the redundant hybrid variables in the hybrid equations.     

Logistic Growth Curve Fitting ofFokienia Hodginsii by the Marquardt Method

This paper uses the discrete Marquardt algorithm to determine the values of parameters in the logistic equation of Evergreen Needle plant-Fokinenia hodginsii. The Marquardt algorithm is,perhaps,superior than the Gauss-Newton algorithm.     

A Study of Laminated Beam used for Heavy Steel Beam

This paper promotes a method of using laminated beam as heavy beam to improve middle Plate stability and overcome the shortcomings of heavy beam in manufacture and installation. With a practical example, the design method and analysis for the beam body and its connectors are put up.     

Dynamical Programming Algorithm for Multilayer feedforward Neural Networks

This paper trains the multilayer neural networks using dynamical programming.The weithts are adjusted layer by layer. The optimal weishts of each layer are calculated using OBPalgorithm proposed in the related reference. The globally optimal weights of each layer can be obtained by finite iterations.     

杨树基因组DNA提纯方法的优化及其RAPD鉴定

(安徽农业大学林学与园林学院,合肥 230036)     

水稻根系蛋白质提取方法的改良

提取出高纯度的根系蛋白质是获得分离效果好、清晰度高的水稻根系蛋白质双向电泳图像的关键。本研究以水稻六叶期幼苗根系为材料,运用改良的TCA/丙酮/SDS法和TCA/丙酮法、TCA/丙酮/Tris-HCl对水稻根系蛋白质进行抽提,进行蛋白质双向凝胶电泳。结果表明:改良的TCA/丙酮/SDS法适用于水稻根系蛋白质组研究,并且350μg上样量获得的双向凝胶电泳图像更为清晰、重现性好,具有较好蛋白质分离效果。     

诱导富集胞外灵芝酸A的液态发酵培养基优化

采用响应面法对诱导富集三萜类化合物灵芝酸A的液态培养基配方进行优化,得到最优配方为：葡萄糖35 g,组氨酸0.7 g,复合VB 40 mg（VB1 6 mg,VB2 3 mg,VB6 0.4 mg,烟酰胺20 mg,泛酸钙2 mg）,牛磺酸0.1 g,蒸馏水1 000 mL。用5% NaOH以及5% HCl调节pH至6.4。在26 ℃、160 r·min-1的条件下,此培养基上灵芝菌丝生物量为11.45 g·L-1,灵芝酸A的产量为137.98 mg·L-1。     

The Design and Implemention of an Automatic Generation System for Electric Power System Tidal Current and Impedance Charts

The poper proposes an efficient algorithm based on HOPFIELD neural networksto solve the crossing numbers problem of graph theory,and with the algorithm we successfully realized the automatic generation of electric power system tidal current and impedance charts.A technique using logic coordinate system to create,export very large scale graph is introduced in addition.     

A kind of Expert Control Combined with the Supervisory Theory for Discrete Event Dynamic Systems

To overcome the shortages of the supervisory theory for Discrete Event Dynamic Systems,a kind of expert control combined with the supervisory theory is proposed,also a practical example is given to illustrate its effectiveness.