OPTIMAL CONTROL ELIMINATING SWING FOR THE LIFTING CAPACITY

This paper discusses the model for lifting capacity of the crane and optimal con-trol of eliminating swing in lifting process. One half loop control method is presented, which is onlyto examine and measure the trolley speed for eleiminating swing.The fact shows this methOd is sim-ple and practicle for enginceering.     

Application of Water Quality Standand Leuel Method in Eualuazing Status Quo of Heauy-Metals Pollution in Riuers

The status quo of heauy-metals pollution in water phase of course of Long-Tan hydropower statian was eualuated by water Quality Standand Level Method. With this special method,mone objectiue and definite results were obtained.     

AN ANALYSIS OF AXISYMMETRY SHELLS OF SUSPENSION CROSS SECTION BY A METHOD OF INTEGRAL EQUATION IN INITIAL PARAMETER FORM

In this paper,the axisymmetrical shells of suspension crosssection is studied by means of integral equation in initial parameter form.An example of the shells under uniformly distributed load is calculated.     

Application of Matter Element Analysis in Assessment of Ambient Air Quality

A new method for assessment of ambient air quality is proposed by using matter element analysis.This model is simple and reasonable in assessment.The practical example is given,and compared with other methods.     

A MATHEMATICAL MODEL OF FUZZY EVALUATION METHOD FOR ENVIRONMENTAL POLLUTION

The problem of fuzzy evaluation of environmental pollution is importantboth in environment science and in environmental protection.Usual evaluationmethods have their own characteristics.This paper puts forward a mathematicalmodel of fuzzy evaluation method in grades by means of systematic analysisfor environmental pollution.At the same time,it assigns weighted values byordering based on paired comparison.     

玉米自交系及杂交种抗青枯病鉴定

1986-1989年采用自然鉴定和人工土壤接种鉴定的方法，对602份玉米材料的青枯病抗性进行了鉴定。人工接种鉴定397份，其中204份材料表现抗病。在正常年份，人工接种鉴定效果明显好于自然鉴定，但在重病区或青枯病流行年份，在尚未具备人工接种条件时，利用自然发病作为选育抗病材料仍有一定效果。玉米苗期接种青枯病重于成株期     

外源激素和微量元素对茶籽萌发和生理生化变化影响的研究

茶树种子经赤霉素（ＧＡ）、乙烯利（ＣＥＰＡ）硼酸（Ｂ）、钼酸铵（Ｍｏ）、硫酸锰（Ｍｎ）和硫酸铜（Ｃｕ）溶液处理后，子叶吸水能力、持水力、呼吸速率和过氧化氢酶活性增强，可溶性糖和蔗糖含量提高，并加速子叶蛋白质的消耗和胚对蛋白质的利用，从而促进茶籽萌发生长，增加幼苗干重，提高发芽率，其中以ＧＡ１００ｐｐｍ、ＣＥＰＡ１００ｐｐｍ、Ｂ１５００ｐｐｍ，Ｍｏ１０００ｐｐｍ，Ｍｎ１０００ｐｐｍ，Ｃｕ１００ｐｐｍ     

稀土元素对玉米幼苗生长及部分矿质元素吸收的影响

玉米早49×多黄8的种子分别以0、2、5、10、40和100ppm 含80%La 和 Ce 的混合稀土溶液浸泡24小时。幼苗生长于 Hoagland 培养液,辅以人工光照和溶液通气。移栽两周后收获。测定株高、根长、植株叶面积、地上与地下部鲜重和干重以及植株各部分 La、Ce、Ca、Zn、Cu、Mn、Mo 的含量。结果表明,植株中稀土元素含量随处理的稀土浓     

葡萄组培苗瓶外生根技术研究

采用不同种类和浓度的生长素诱导葡萄组培苗瓶外生根，并观察组培苗在不同处理基质、不同的温度、不同的生理年龄条件下生根的效果。通过优化技术参数，建立了葡萄组培苗瓶接生根的技术优化体系，结果表明，用浓度为0.3mg/L的IBA浸蘸处理的插条，在温度为27~29℃的环境条件下在基质珍珠岩上培养，瓶苗茎段的生根率可达85.5 %，移栽后苗木的成活率达98 %，相对于其他方法有了较大的提高。该技术的建立有助于实现葡萄工厂化育苗技术的商业化扩大。     

节水灌溉条件下冬小麦耗水规律及其生态基础研究

从土壤水分、作物生长发育及气象条件三个方面分析了冬小麦农田耗水变化特点。结果表明：在土壤水分状况较好条件下冬小麦农田耗水强度呈双峰曲线变化,不同灌溉处理的耗水高峰出现时期及其峰值不同,而与灌水时期一致,同时灌溉能够明显降低冬小麦利用土壤底墒水能力。在拔节以前冬小麦农田耗水与大气蒸发力呈显著直线相关;拔节后与其干物质积累以及土壤水分含量呈显著正相关,拔节期是冬小麦需水的生理生态临界期。