自动跟踪同期控制系统低阶H∞鲁棒控制器设计

依据交互投影原理 ,就低阶H∞ 鲁棒控制器设计问题提出了一种具体实现算法 ,进而将其应用于某变频调速电动 发电机组自动跟踪同期控制系统的鲁棒控制器设计。由该算法得到的低阶H∞ 鲁棒控制器所构成的闭环系统性能与全阶控制器相比无明显差别 ,特别是主要性能指标 ,如快速跟踪、无超调及解耦等全与阶控制器基本相同。     

计算机信息处理环境对会计实务的影响

会计计算机信息处理是指信息技术(IT)支持下的会计环境。计算机信息处理环境对会计实务的主要影响可以归结为：对会计语言和会计文化的影响，对会计行为的影响，对会计人员素质要求的影响，对内部控制和外部监督体系的影响。会计计算机信息处理环境的应用，使传统会计实务产生了革命性的变化。     

Analysis of Apparent Elasticity Constants of Woven Fabrics

The woven fabric can be defined as orthogonal elastomer if the extension force that puts on the fabric is very small. Based on the precondition, the apparent elasticity constants of a woven fabric were analyzed theoretically in the paper. The bias angle (which is between weft yarns and extension direction) affects apparent elasticity modulus and elasticity coefficient of the fabric in the extension direction. And the experiment describes fluxes of elasticity constants going with the bias angle of the fabric.     

重启中美医学交流:以《美中交流通讯》为例

《美中交流通讯》保存了较为丰富的包括医学在内的科学技术和文化交流的记录,是了解这一时期中美医学交流极有价值的资料,对《美中交流通讯》文本的分析,为我们审视中美医学交流重新开启和不断发展的历史轨迹及其影响因素提供了一个独特的视角,使我们了解“文化大革命”之后中美医学交流重新开启所经历的曲折过程。     

Preparation of High Shrinkage Polypropylene

The common PP chips have been used to prepare high shrinkage PP fibers with shrinkage in boiling water higher than 50%. Meanwhile, the process conditions on fiber structure and properties have been discussed in detail. With the increase of drawing temperature, the shrinkage in boiling water of the fiber increases at first, and then decreases in the temperature range from 70℃to lOO℃. The better drawing temperature is from 75℃ to 85℃ according to the melt index of the PP material. The shrinkage in boiling water of PP fiber increases with the increase of pump delivery. The orientation factor and crystallinity increase with the increase of drawing temperature. With an increase in drawing temperature, unit-cell numbers and monomer unit numbers in every crystal nucleus tend to increase, but unit volume crystal nucleus tend to reduce.     

天津市“十五”基础研究工作总结

基础研究是科技与经济发展的源泉和动力,也是培养和造就科技创新人才的摇篮。“十五”期间,天津市认真贯彻落实科学发展观,按照科技部及市有关加强基础研究工作的部署,以高等院校和科研院所为着力点,以提高天津市知识创新能力为主要任务,积极组织和动员全社会力量,充分调动各类     

坚持科学发展观搞好大理州工业小区环境保护工作

大理州在工业小区建设中,对“三废”的处理仍存在一些问题。要解决这些问题,必须采取完善发展战略,慎重引进工业项目、积极引导致污企业加大治污研发投入,完善环保监测组织,发展环保产业,树立科学的发展观和正确的政绩观等措施。     

全氢罩式退火炉退火热过程的研究（I）——数学模型及其实测验证

分析了全氢罩式退火炉退火工艺过程的传热特点，建立了以板卷温度计算为核心的退火热过程数学模型，通过模拟计算得到了钢卷退火曲线，并与实测值进行了对比验证．结果表明，该数学模型合理、可靠．     

Thermal Properties of Crosslinking Modified Ultrahigh Molecular Weight Polyethylene Fibers by Ultra-Violet Irradiation

By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpolyethylene(UHMWPE)fibers prepared by gel-spin-ning was carried out.Thermal properties of fiber sampleswere examined using differential scanning calorimetry(DSC),thermomechanical analysis(TMA)apparatusand a manual device.The results indicated that the opti-mal irradiation energy is 250-400 mJ/cm~2,heat-andcreep-resistant behaviors of modified fibers have beenimproved.     

The Role of Computational Intelligence in Sensory Evaluation

IntroductionComputationalintelligence(CI)isthestudyofthedesignofintelligentagents.Thedifferencebetweentraditionalartificialintelligence(AI)andCIisthatAIisbasedonconventionalhardcomputingwhereasCIisbasedonsoftcomputing(SC).Ineffect,therolemodelforsoftcomputingisthehumanmind.Theguidingprincipleofsoftcomputingis:exploitthetoleranceforimprecision,uncertaintyandpartialtruthtoachievetractability,robustnessandlowsolutioncost.Softcomputinghasrecentlybecomeahottopiconconferencesandinliterature.As…