A practical fuzzy controllers scheme of overhead crane

1IntroductionThe overhead crane systemis widely usedinindustryformoving heavy cargos .Thus anti_sway and position controlhave become the requirements as a core technology forautomated crane systemthat are capable of flexible spatialautomatic conveyance .The purpose of crane control is to reduce the swing ofthe load while movingthe trolleyto the desired position asfast as possible .However ,the overhead crane has seriousproblems :the crane acceleration,required for motion,always induces undesir…     

融合与独立:异质公共空间与日常生活

“你应试着去体现固有的意义.因此,要贴近意义并进行构建.” ——阿尔多凡·艾克[1] 这个项目是一段带有目的的关于空间序列、墙以及场所的思考. 1 空间序列 项目的建设用地经过多轮考量后,业主最终选择了一块位于地下人防和停车场之上1.45 hm2大的地块,北侧近社区会所旁的丁字路口,西北侧为保护林地,南侧紧邻高密度的居住区.这块位于道路西侧横置的不规则地块直面道路另一侧的滨海酒店.在这样复杂的用地条件下,马会和社区居民的关系该是如何?它不该只是为爱马人士和在里面生活的马匹而设计,成为一个孤立于社区日常生活外的“孤岛”.建筑带给人们的体验让建筑拥有了存在的意义,而想象创造这种体验最终的呈现一直指引着项目的设计.     

POLYMERIZATION OF BUTADIENE IN TOLUENE WITH NICKEL(II) STEARATE-DIETHYL ALUMINUM CHLORIDE CATALYST†

A bench-scale batch reactor was used to study the polymerization of butadiene with nickel(II) stearate Et₂AlCl catalyst. In particular, the effects of moisture on polymerization were investigated. The initiation reaction is sensitive to temperature. At 0°C an induction period was observed, but at room temperature initiation can be assumed instantaneous. Water enhances catalytic reactivity, however at water concentrations greater than 10 mmol/L, termination reactions become significant. Maximum conversion is obtained in the 6 to 15 mmol/L range of water. The determining step for the molecular weight of polymer is the chain transfer to monomer. At low H₂O concentration the molecular weight increases with water concentration, however it becomes independent of water concentration at high moisture content. With the help of statistical analysis of the experimental data, a two-active-species model was developed to describe the kinetics of the system and to explain certain polymerization characteristics.     

台湾荖浓溪河床演变特性研究

天然河川随水流输砂能力、底床条件及来水来砂条件等变化而演变,以相应调整河床型态与水砂关系,促使河川趋向近似冲淤平衡稳定状态.在一定流域来水来砂的条件下,河流将调整它的比降、型态、河床物质组成及河型进而达到稳定状态.河川型态分类将有助于了解河床稳定特性、来水来砂条件及河床地质条件相适应之均衡型态.本研究以台湾重要河川荖浓溪流域为研究范围,利用Leopold and Wolman(1957)[1]、Ferguson(1984)[2]、许炯心(2004)[3]及陈树群五层分类法(2001)[4]等方式进行著浓溪河川型态分类,透过水文地文数据分析、河川型态分类与水力几何型态判别等计算,以进行河川型态特性分类及河床稳定等课题之分析探讨,研究成果将有助于了解流域河川特性及河床演变之定性定量评估,并提供作为河川复育与流域经营管理之参考.     

台湾河川流域淹水指数评估研究

目前水利主管机关为有效管理流域中下游洪水灾害,已建立许多防洪治水工程,包括堤防、排水系统及抽水站等,但随着集水区中上游土地利用急剧改变,致使原先设计之防洪设施可能已不足应付开发所增加之洪流量,因此近年来已投入适当资源,并以工程与非工程防洪方法并重为原则,让台湾防洪工作进入崭新的一页。本研究主要是选定淹水指数评估参数之项目,并以阶层分析程序法（Analytic Hierarchy Process,A．H．P．）及所设计之专家学者问卷,决定淹水指数评估参数之权重,以研拟河川流域淹水指数评估方法,与评估河川流域淹水损失之严重性,未来将可应用于评估河川防洪排水等整治工程之施设优先顺序,并做为评定工程整治后成效以及满足防灾应变预警之参考。目前研究以淡水河、头前溪、浊水溪、高屏溪及秀姑峦溪为例,根据其水文、水理及人文现况,进行淹水指数试算,其淹水指数分别为60．1、36．9、33．4、38．3及35．2。由于本次试算中,因某些参数资料难以获得,所以在试算中是以初估之方式进行评估,建议未来可配合实际现况,对各项评估参数之评分标准做适当之调整,以使淹水指数之计算更为合理。     

8mol％CeO_2－ZrO_2中的贝氏体相变

测定８ｍｏｌ％ＣｅＯ２－ＺｒＯ２在连续冷却中变温ｔ→ｍ的Ｍｓ，在Ｍｓ以上及以下的等温相变动力学曲线和相变产物的点阵常数等．温相变产物（贝氏体）的点阵常数小于变温马氏体的点阵常数．参照金属材料中的贝氏体相变，建议８ｍｏｌ％ＣｅＯ２—ＺｒＯ２的等温相变为扩散过程控制的贝氏体相变．贝氏体可能在母相晶界形核．     

Minimum redundancy multiple burst-error-correcting cyclic codes†

This paper will present a class of minimum redundancy multiple burst-error-correcting cyclic codes. Although the rate of transmission is poor, it has a very easy decoding algorithm.     

A note on constant weight cyclic codes

In this paper we show that the dual code of a g-ary Hamming single error-correcting code is a constant weight cyclic code with weight q(m-1). We give, as a consequence, a very simple alternative derivation of the weight enumerator formula for the q-ary Hamming single error-correcting code. We show also that a binary cyclic equidistant code can be derived from this dual code