RESEARCH ON A KIND OF GREY LINEAR PROGRAMMING AND THEIR DUAL THEORIES

In this paper, a kind of grey linear programming with grey interval coefficients is discussed,the definitions of the first and second whitenized linear programmlngs and the grey dual linear programmings are presented, the relationships between the solutions of the above three kinds of programming and the solution of the primal programming are explored, and some new conclusions are obtained.     

The Effect of Additions in the Fermented Solution on Bubble Coalescence

This paper presents a detail study of bubble coalescence in inorganic salts and organic compounds of fermented solution ,and preliminary analyses the principle of bubble coalescence.The experiments show that the relationship between the solute concentration and coalescence frequency reveals the existence of sharp transition concentration.     

A Class of Exact Solution for RLW-Burgers Equation

A class of analytic solution for RLW Burgers equation and KdV Burgers equation are given which include results of some papers.These solutions can be expressed as some linear combination of solutions of Burgers equation and RLW equation or KdV equation which correct conclusion in some paper.     

Determination and Evaluation of Saccharides Content in Extract of Herba Spirodelae Seu Lemnae Polysaccharides

In the course of searching immunodulators from natural herbal sources,the polysaccharide has been isolated from the water extract of duckweed(Herba Spirodelae seu Lemnae).The authors aim at investigating the methods that determine the content of total saccharides in the mixture,accordingly,to be used as a quality control in the procedure of producing polysaccharides from duckweed.The contents of saccharides in the extraction were mensurated by spertrophotometry of sulphuric acid-phenol and sulphuric acid-anthrone.And the validitiy of methods was evaluated through some indexes such as linearity and range,precision,stability,and accuracy.The results reveal the methods are convenient,rapid,accurate,and high sensitive,thereby leading to a wide and effective use in determining the saccharides contents in polysaccharides extraction from Herba Spirodelae seu Lemnae.     

EXISTENCE OF A BASIC OPTIMAL SOLUTION FOR LINEAR VECTOR EXTREME VALUE PROBBEM

In this paper, the concept of basic for linear vector extreme value problem is introduced in the partially ordered vector space. Some properties and results of the linear programming are generalized. And the existaence therom of basic optimal solution is proved.     

绵茵陈中绿原酸的提取工艺研究

【研究目的】研究并优化乙醇提取绵茵陈中绿原酸的最佳操作参数;【方法】以绵茵陈为原料,通过单因素试验、正交试验和方差分析确定最佳提取工艺;【结果】结果表明:乙醇提取绵茵陈中绿原酸的效果较好;确定的最佳工艺参数乙醇浓度为60%、料液比1:25、提取温度60℃、提取时间1.5h;【结论】采用60%乙醇可以很好提取绵茵陈中的绿原酸。     

生物质气体燃料概述与展望

论述了生物质气体燃料的种类以及生产各种气体燃料的相应技术及其国内外发展概况和存在问题.生物质气化方面国内外有产业化实例;生物发酵制氢大多数处于实验阶段,关键是培育高效产氢发酵菌种、进一步提高系统的产氢能力、降低生产成本;厌氧发酵制取沼气生产技术比较成熟,在其生产过程中不消耗其它能源、没有环境污染、而且可降解各种有机废弃物,是目前最有希望的生物质能源之一.     

增加投入实现引黄灌溉良性发展

引黄灌溉经济效益显著,但是灌区管理单位的财务收益却入不敷出。根据经济效益分析与水费收交情况,作者认为应加强水费回收,多方面集资以及深化水费改革等,以利于灌溉事业的良性发展。     

无土栽培技术的发展状况及趋势

近年来无土栽培以其优质、高产、高品质的特点,深受人们的关注.介绍了国内外无土栽培的发展状况,着重介绍了国内外无土栽培的栽培方式、自动化程度、营养液的调控和管理技术,并分析了国内无土栽培存在的问题及今后的发展方向.