RSOFCPN: CONTROL SYSTEM STRUCTURE AND ALGORITHM DESIGN

IntroductionThe learning approaches of neural network canusually be distinguished into three classes:su-pervised learning,unsupervised learning and re-inforcement learning.The supervised learningscheme has the highest efficiency but requiresthe learning systems to provide with desired out-puts.Obviously,it is very difficultin many cas-es.Unsupervised learning methods constructin-ternal models at capture regularities in their in-puts without receiving any additional informa-tion.Therefore,its …     

EXPERIMENTAL INVESTIGATION ON TWO-DIMENSIONAL UNSTEADY COLD FLOW IN MPC EXHAUST MANIFOLD

IntroductionIt is obvious that the gas flow in the exhaustmanifolds,especially at the conjunctions has amulti- dimensional characteristic[1] .The study onthis characteristic is very important for the uti-lization of exhaustenergy and the decrease of ex-haust pumping loss.In this paper,the measure-ment of cold flow has been carried out to studythe multi- dimensional phenomena of unsteadyflow in the exhaust manifolds.In order to em-phasis the important characteristics of the flowand reduce the a…     

KEY TECHNOLOGY FOR PRACTICAL 1-mm-DIAMETER ELECTROMAGNETIC MICROMOTOR

IntroductionThe development of microfabricated motors hasbecome an expanding field in microtechnology.The efforts have been concentrated on the use ofelectrical forces,mostly with electrostaticdrive[1～ 7] .Electrostatic micromotors with typi-cal rotor diameters of1 0 0 μm have been fabricat-ed entirely by planar IC- processes.Their maindrawbacks are small output torque( 1 0 -9N· m-scale) and high driving voltage( about1 0 0 V) .In contrast,electromagnetic drives which are ef-ficient as th…     

RESEARCH ON THE DOF DISPOSITION AND MECHANISMS DESIGN OF HUMANOID ROBOT

IntroductionSome researchers[1～ 3] in Yugoslavia,Japan andAmerica have got many achievements in bipedrobot since the beginning of1 970 s.The bipedrobot can walk in static and dynamic gait and al-so can turn around and go up stairs.Recentlyhumanoid robot has become a hot researchingpoint[4,5 ] .Humanoid robot has body includinghead,neck,waist and hands.Biped robot is abasis of humanoid robot.Usually a humanoidrobot should have more than 2 0 DOF.All thetechnology problems in DOF planning,m…     

指引路径规划模型的建模与仿真验证

道路上某个位置存在多个指路标志时可能引发信息过载问题,对驾驶员产生干扰. 为解决这一问题,本文基于A* (A-star)算法,提出一种指引路径规划模型.考虑特定节点信息过载问题对指引路径实际成本的影响,在模型的估价函数中增设惩罚系数,可以有效避开引发信息过载现象的指引路径选择 . 基于 VISSIM 展开案例研究,借助其二次开发功能提取 VISSIM路网中的相关数据.利用所建指引路径规划模型求解路网中一对OD间的指引路径. 最后,对比分析有无惩罚系数两种模型得到的指引路径规划和指路标志布设方案,证明本文模型在指引路径规划时可有效避免信息过载问题.     

原发性高血压病血栓素A2-前列环素平衡及血小板功能改变的探讨

本文对63例正常人,126例原发性高血压(EH)患者的血浆TXB2、6-酮-PGF_(1a)及血小板聚集率进行了测定,并对单纯性高血压及合并心脏损害或缺血性脑血管病患者作了分析。结果表明,EH血浆TXB2水平较正常组明显升高。6-酮-PGF_(1a)水平则低于正常组,血小板聚集性较正常组高。单纯高血压组TXB2、血小板聚集率均低于有合并症组。提示EH存在TXA2-PGI2失衡及血小板功能亢进,其可能参与高血压的发生、发展,并为高血压合并心脏损害及缺血性脑血管症的病理基础之一。     

DF8CJ型交流传动内燃机车主变流器

介绍了DF8CJ交流传动内燃机车主变流器的技术特点和主要参数,描述了其主要组成,阐述了主变流器控制系统原理及主要保护功能,并介绍了主变流器的改进,这些改进在新生产的2台机车上得到了验证,试验效果良好.     

出口巴西SDD8型内燃机车电气系统的优化设计

从巴西铁路状况出发,详细分析了出口巴西的SDD8型内燃机车的机车运用条件,机车电气系统的设计需要解决的主要问题,系统地介绍了巴西机车电气系统的优化设计.结果表明,机车完全能满足巴西运用环境的要求.     

ZPW-2000A轨道电路在单线半自动提速区段的应用

本文提出单线半自动闭塞区段设置双接近区段和接近信号机，接近区段采用ZPW-2000A无绝缘轨道电路，提高列车的运行速度和安全性能。     

316L氧分离器腐蚀浅析

材质为316L不锈钢的氧分离器在碱性环境中出现腐蚀裂纹。通过着色试验、金相检查、扫描电子显微镜、化学分析仪等检测方法,对316L不锈钢氧分离器内壁裂纹的宏观形貌、显微组织、腐蚀产物进行分析,结果表明,氧分离器封头焊接热影响区开裂是典型的应力腐蚀破坏,碱液中的溶解氧加重了腐蚀的危害程度。本文对腐蚀原因进行了分析,并针对氧分离器特殊的工作环境,提出了应对措施。