Optimizing Capital Structure of Enterprises by Multiobjective Programming Model

This paper puts forward that capital structure is affected by cost of capital?risk?the agin ability? and the ability of capital value preserved and added, several factors, of and at the same time the authors analyzes them by approaching the limitation of regarding the weighted average cost of capital as the optimal standard of capital structure in the traditional capital structure decision-making method. Therefore multiobjective-programming method is applied in the capital structure to establish the target function and its subjection equations. Furthermore , this article shows its application.     

Dual Theory of Nonsmcoth Multiobjective Programming with Set Functions

In this paper,for a nonsmooth multiobjective programming with set functions,Wolfe type duality and MondWeir type duality are established. Weak dual theorem,direct dual the-orem and in verse dual theorem about effictent solution are discussed.     

MULTIOBJECTIVE FRACTIONAL PROGRAMMING WITH SET FUNCTIONS

Systematically discusses the fundamental theorems of weak efficient solution, efficient solution and properly efficient solution for multiobjective fractional programming problems with set functions. Under suitable conditions, we give some theorems connecting multiobjective fractional programming with set functions and its scalarization problems as well as the corresponding saddle point problems.     

钾对小麦生长发育、抗旱性和某些生理特性的影响

钾对植物的抗旱性有着密切的关系。我们就不同土壤水分条件下钾肥对小麦的生理效应及其对抗旱性的影响作了初步研究。在缺钾的土壤中,无论是充分供水或干旱,施用钾肥均能促进植株对氮和磷的吸收和运转,提高叶水势、叶片持水力,从而提高土壤水分的利用效率。在生长期间,钾能提高叶片的叶绿素含量,增大叶面积,延长叶的功能期,提     

OPERATION PROPERTIES OF r-CONVEX FUNCTIONS

Generalized convex function is a generalization of convex func-tion,including pseudoconvex function,quasiconvex function,r-convex function,etc.The properties and operation properties of generalized convex functionplay an imporant role in generalized convex programming.Xue Jiasheng discu-sed the constructive method of pseudoconvex function;J.P.Crouzeix dicussedthe properties of quasiconvex function.This paper only discusses a class ofgeneralized convex function,r-convex functions.     

Application of the Method of Ordinary DifferentialEquations in Multiobjective Programming

In the author's previous works,a methed of ordinary differential equations forsolving multiobjective programming problem had been presented. In this paper, we further use ordi-nary differential equatfons to discuss the general multiobjective programming Problem and its con-straints more deeply. Under certain conditions, starting from some neibourhood of any feasible solu-tion of multiobjective programming problem, along the trajectory of the established system of ordi-nary differential equations,the solution is always conversent to the(weak)efficient solution of theoriginal multiobjective programming problem with respect to partial arguments.     

磷化氢环流熏蒸技术应用中需注意的几个问题

本文从仓房的气密性、用药量浓度和密闭时间与杀虫效果的关系、磷化氢环流熏蒸中可采用的几种方式、熏蒸效果的检查与评价等几个方面阐述了磷化氢环流熏蒸中应注意的若干问题，并对几种不宜进行整仓环流熏蒸的情况进行了说明。     

水稻根际微生物肠杆菌E-25和肺炎克雷伯氏菌K-12固氮作用的一些生理特性

我们研究了从京郊地区水稻根际分离出的一株肠杆菌(Enterob acter sp)E-25和一株肺炎克雷伯氏菌(Klebsiella pneumoniae)K-12的固氮特性.两种菌均具有较强的固氮活力.用乙炔还原法测定,E-25的比活为552毫微克分子C_2H_4/小时.毫克菌体蛋白,K-12的比活为676毫微克分子C_2H_4/小时.毫克菌体蛋白.在对数生长期菌体蛋白迅速增长,固氮活性也随之增高.对数生长期后,菌体蛋白停止增长,固氮活性开始下降.E-25和K-12均为兼性好氧细菌,在无氧和微氧条件下固氮活力显著高于常氧条件下.E-25比K-12对氧更加敏感.这两种菌可能是在北方碱性土壤中占据优势的根际固氮细菌.由于长期适应生存条件的结果,这两种菌固氮的最适pH值均偏碱性.E-25对碳源的利用也不同于南方水稻根际分离出的肠杆菌.E-25只能利用果糖、葡萄糖和蔗糖,而不能利用琥珀酸、柠檬酸等有机酸做固氮的能源.我们推测E-25在固氮过程中所需能量主要来自糖酵解途经.     

大豆主要品质指标对其力学特性的影响

为研究大豆主要品质指标与大豆机械力学特性的关系,探讨用于评价大豆机械性能的理化特性指标。以5种大豆为原料,分析了不同大豆品种的水分含量、籽粒大小、化学品质与大豆长轴、短轴挤压力学特性的相关性。结果表明:随着含水率的增加,大豆籽粒的破裂力均逐渐减小,压缩功则逐渐增大;长轴和短轴的挤压力学特性参数不同,短轴压缩时大豆的总体力学特性参数更大;籽粒的尺寸、形状与大豆的挤压力学特性关系密切,籽粒大小与大豆的挤压力学特性呈正相关;粗蛋白含量与大豆挤压力学特性呈正相关,粗脂肪含量与大豆挤压力学特性呈负相关。研究结果可为大豆储运、加工设备设计的优化以及大豆的品质评价提供一定的参考。     

小麦锈病研究工作中若干观点性问题的讨论

十九个小麦良种用六个叶锈菌优势小种分小种测定,其中十八个表现高度抗病,是用来自河北、北京176个叶锈菌株进行多菌株、分菌株测定时,就没有一个品种对所有菌株都抵抗,感病率为9.1—61.4%.说明研究锈病应有群体观点.比较了新疆和河北、北京叶锈菌群体的毒性.根据一些中度抗病品种对两地叶锈菌的反应,都表明新疆叶锈菌群体的毒性比河北、北京的强.在不同生态条件下形成的叶锈菌群体的毒性可能不同,因此研究锈病应有生态观点.寄主和病原物的相互作用及其遗传变异是长期的,寄主和病原物共同进化.研究锈病应有进化观点.过去的研究工作有片面性,应考虑改进.     

PROPERTIES OF HOMOGENEOUS FUNCTION AND ITS APPLICATIONS

This paper proves some properties of homogeneous function. Mainly, it proves that a sufficient condition of a parahomogeneous function is a subhomogeneous function. From which the relations of homogeneous function and partial derivatives of its respective variables are obtained. By these properties, this paper finally solves spcial first order total differential equations and obtains the quadrature of total differential of some function with n-variables. The obtained method of solution is simpler than usual one.     

THE ANALYSIS OF PROPERTIES OF FIRE SMOKE FLOW IN BUILDING

This paper presents a method to solve smoke fow in building on the basis ofprincipies of graph theory. According to this method,the pressure and rate of smoke flow of everyroom and passageway in different times can be worked out simultaneously,The method is successfulin calculating ventilation and smoke flow.     

玉米堆的压缩弹塑性实验分析

利用LHT-1型粮食回弹模量测定仪对玉米堆在不同条件（预压力,水分）下的无侧向膨胀回弹模量进行了实验测定,分析了不同预压力（0、100kPa、200kPa）、不同水分（13.89%、15.12%、17.71%、18.74%）对玉米堆回弹模量的影响;弹塑性形变之比与预压力的关系以及每次加卸载时塑性形变的变化规律。实验结果表明：同一水分下,玉米堆的回弹模量随着预压力的增大而增大;同一预压力下,随着水分增大,玉米堆的回弹模量减小;第五圈的弹塑性形变之比随预压力的增大而减小;每次加卸载后塑性形变随加载次数的增加而减小。     

小麦面团流变学特性与馒头品质分析

测试小麦面团流变学特性具有重要意义。测试的主要方法有基础法和经验法两种。测试仪器主要有粉质仪、拉伸仪、揉混仪、吹泡示功仪、质构仪等。粉质仪主要测定的指标有面粉吸水率、面团形成时间、面团稳定性、弱化度和粉质质量指数等。拉伸仪主要测定的指标有面团抗延伸性、延伸性、拉伸面积、拉伸比例等。揉混仪主要测定的指标有抗揉混阻力、最佳揉和时间、搅拌耐力、烘焙估计吸水值等。吹泡示功仪可以得到面团的韧性、延伸性和烘焙力等信息。质构仪可获得对面团流变特性最大拉伸阻力、拉伸比、面团粘性、面团强度等参数的测试结果。     

SOME PROBLEMS OF DESERVED RESEARCH IN THE PROCESS OF GAS DESULPHATION

Many factors have influence on gas desulphation,Through theoretical a nalysisof desulphation reaction principle and a lot of experiment and production data,this paper studies withthe emphasis on how to solve some concrete problems about selecting and mixing desulphation solu-tion in order to gain the best economic benefits and environment benefits and social comprehensivebenefits.     

甘薯配合力分析的若干问题

首次将不完全双列杂交(NCⅡ)模式,结合甘薯遗传特点应用于甘薯育种。根据4年试验结果,提出了可行的试验方法、群体规模和评定指标;并就高淀粉、高产育种亲本选配中的若干问题提出了看法。     

面筋吸水率和面粉某些品质指标的相关性

对５０个面粉样品的面筋吸水率和某些品质指标进行了测定。实验结果表明，标准粉和特制粉的面筋吸水率差异不显著，面筋吸水率和湿面筋蛋白含量显著负相关，两种面粉都达到０．０１显著性水平，面筋吸水率和干面筋蛋白含量显著正相关，标准粉和特制粉的相关性分别达到０．０５和０．０１显著性水平。     

A STUDY ON MATERIAL PROPERTIES OF PS FILTER-MEDIA

This paper studies physical and hydraulic perperties of PS filter-media and introduces it's chemical property.It is a reference for researchers and engineers in the filtration technique.