液压油液数字建模与仿真

因液压油液的温度、压力及油中已溶解或未溶解的空气量等因素变化时,油液的特性会发生非线性行为变化,从而影响液压系统的性能,为此对液压油的综合特性进行了研究。推导出溶解了空气的液压油液密度及油中空气含量随油液压力、温度变化的函数关系;应用Matlab软件编制的仿真程序,对液压油的非线性特性进行了大量仿真计算,并讨论了影响液压油密度、体积弹性模量的因素。     

中国户用沼气技术转化制约因素分析及对策

围绕生物质能源技术转化和农村可持续发展目标实现的制约因素，提出发展户用沼气池相应对策：改变政府职能和激励措施，搭建自由公平的社会平台；开拓多种融资途径，加强科技研发和成果转化，构建服务体系，推进沼气技术产业化；通过科普宣传、资金扶持、政策约束和经济效益反馈激励等措施，协调和促进农村沼气能源的开发利用。     

三氯蔗糖在食品加工中的应用及测定方法的研究概况

介绍了三氯蔗糖的特性。阐述了三氯蔗糖在食品加工中的应用及测定方法的研究概况。     

牛Myostatin基因单核苷酸多态性分析

Myostatin基因即肌肉生长抑制素，是一种肌肉生长的负调控因子。应运PCR-SSCP和测序的方法对中国秦川牛、南阳牛以及国外引入品种皮埃蒙特牛双肌基因的第三外显子进行了多态性分析。结果表明：第三外显子938处G→A的单核苷酸的突变造成了南阳牛、皮埃蒙特牛第三外显子扩增片段多态性,秦川牛则不然。     

生物质能源作物——能源甜菜的开发利用

随着全世界能源物质的不断扩展,可再生的生物质能源将是21世纪主要的能源物质。能源甜菜是新兴的可再生能源作物,它具有生物学产量高,乙醇转化率高,含糖量适中等特点,是取之不尽、用之不竭的环保能源,对环境几乎没有污染;同时又是糖饲兼收的作物。利用能源甜菜通过酒精发酵创造乙醇燃料新能源,可以减轻或消除与粮食争地的矛盾,是保证粮食安全和能源安全的双赢举措。     

磷化铝动态潮解膜下环流熏蒸生产性试验

磷化铝动态潮解法是配合环流熏蒸使用的一种新型施药方法，本试验结合我库的具体情况，将动态潮解与膜下环流熏蒸有机结合起来，有效地解决了仓房气密性、有效时间、害虫再次感染等问题，大大提高了熏蒸杀虫效果，为抗性害虫的综合治理探索出一条新路。     

Strength and Microstructure of Sulphoaluminate Cement Containing Ultra- Fine CaCO3

The existence of ettringite in sulphoaluminate cement hardened paste is mainly in the form of pole-like crystal,which causes unfavorable effect on the cement.In this paper the strength and microstructure of the sulphoaluminate cement containing ultra-fine CaCO_3 weze discussed.Experimet results show that the strength of sulphoaluminate cement was obviously improved by adding 3% of ultra-fine CaCO_3.After curing for 28d,the compressive strength of cement paste and mortar is 100.6MPa and 94.1MPa respectively,and the bending strength of the mortar reached 12.5MPa.SEM study on hardened paste of sulphoaluminate cement containing ultra-fine CaCO_3 showed that its structure was dense and homogeneous,there was hardly any massive crystall detected.     

Digital Beamforming for Unified Spread Spectrum TT&C System

In TT&C system,unified spread spectrum framework and adaptive antenna digital beamforming technologies are used to track, telemetry and command objects. Constant modulus array (CMA) and adaptive signal canceller estimate the direction of arrival (DOA) of every signal and use the optimum weighted vector to form the beams. The phase weighted vectors estimated from DOA improve the processing gain as well as being utilized in the transmitting of tele command signal to form the beam of specified object. Its processing performance is researched and simulated in this paper.     

Application and Advancement of Reinforced Earth Technique

In this paper, the application of reinforced earth technique, principle and calculation method, new reinforced materials developed and produced are introduced. A few of key technical problems in reinforced earth application is discussed, such as reinforced earth behavior, calculation method, durability of reinforced material, amendment and complement of the current standards. Then, the reinforced earth technique development and advancement were introduced.     

Real-time Vehicle Scheduling

The traditional scheduling for vehicle is option in the fixed network. But it can't satisfy the real time environment. The demand of order is changeable and uncertain in real environment. It is convenient for scheduling transforming it into static data, but can't get the advantage on time. This paper proposes a real time vehicle scheduling on the study of traditional scheduling and discusses the model structure and the key technology for the real time system that establishes the base for develop teal time system.