Optimization of Curve Fitting Used in Development of Magic Formula Tire Model

Characteristics of a tire are the foundation of vehicle dynamics studying, especially play a vital role in vehicle handling study. It is necessary to establish a tire model in the simulation for vehicle handling because the tire characteristics got by test can not be satisfied.The optimization of fitting to the tire test data curves by Magic Formula is discussed, included the digitalization of tire test data curves, designing objective functions and optimization processes,etc. Finally the parameters in Magic Formula tire model are obtained and they lay a foundation for the development of vehicle handling aftertime.     

Analysis of Project Audit''s Function and Civil Action

Audit takes a unique status and has obvious function in financial surveillance system.The Audit is used to superintend the factuality,validity and virtue of fiscal and financial income and expenses.In the renewed China Audit law the functions and status of official audit have been intensified,and the qualification and status of Audit department as executing office is confirmed.This paper analyzed the official construction project audit's function and legal status.     

Grid Workflow Management System Research and the Realization Based on the OGSA

Grid applications have evolved from science research to business and manufacture field, in these fields, tasks always process in workflow mode. In order to found a workflow management system in grid , the authors adopt a hybrid grid workflow engine after analyzing the characteristics of grid environment and give a referenced model of workflow management system in grid that is based on the engine. Through the examination, the authors prove the original intention is feasible.     

Detecting Technology of Cabel Surface Defect Based on DSP and Image Recognition

The damage of bridge cable directly hazards the normal use of bridge and the safety of people. The paper discussed the signal acquisition and detection system which takes embedded DSP processor as core technology, combined with CCD, video decode chip, SDRAM, FLASH ROM, and established the fast measuring algorithm of the surface corrosion and damage, which includes deteminating the processing region, improving medium filter, sobel edge detection and dynamic threshold segment, close operation of morphology, computing defect area and saving. The experimental resuits show that this method implemented the real-time, non-contact and intelligence detecting of cable surface defect and gives the specifications of the system.     

叶菜型甘薯新品种百薯1号的选育及其特征特性

百薯1号是由安薯07自交选育而成的叶菜型甘薯新品种。株型半直立,基部分枝数25~30个,茎蔓细嫩,最长蔓长80~100cm,叶片小,全身无茸毛,适口性好,茎尖产量一般22500kg/hm2以上。薯块产量夏栽30000kg/hm2以上,春栽37500kg/hm2以上。在茎尖产量22500kg/hm2左右条件下,薯块产量可达19500kg/hm2左右。     

屏蔽泵抗汽蚀性能的试验

介绍了低汽蚀屏蔽泵的结构和工作原理，分析了该种泵的性能特点以及汽蚀产生的原因等，提出了提高抗汽蚀性能所采取的措施。从改善叶轮进口几何形状的设计方法方面来降低泵的汽蚀余量，例如叶轮进口直径Dj，叶片进口安放角β1，叶片进口边的形状，叶片数，叶轮进口流道形状等。对两台屏蔽泵进行了性能试验：通过能量性能试验确定出扬程H、输入电机功率N、机组效率ηgr与流量Q之间的关系，通过汽蚀性能试验确定临界汽蚀余量△hc与流量Q之间的关系。结果表明，两种规格屏蔽泵的性能均达到了设计的要求。     

基于C8051F单片机的发动机转速测量

介绍了一种基于C8051F单片机的发动机转速实时测量方法,给出了测量系统的实现技术和硬件结构,并进行了软件设计及实验。该方法在实际测量中取得了良好的效果,为发动机动力性能研究提供了重要的参考依据。     

仿生非光滑凸包和凹坑表面滑动摩擦磨损试验研究

非光滑表面对耐磨性有影响,并且不同的非光滑表面对耐磨性的影响是不同的。为了进一步研究其规律,本文进行了非光滑凸包和凹坑表面的耐磨性试验对比研究,得出在相同试验条件下,非光滑凹坑表面比凸包表面具有更好的耐磨性。     

ZrO_2对Al_2O_3基泡沫陶瓷过滤器的性能影响

以Al2O3为主要成分的料浆中加入ZrO2,采用有机泡沫浸渍法,用1560℃烧结制备Al2O3基泡沫陶瓷过滤器,并测定不同ZrO2含量过滤器样品的抗压强度、热震次数并观察其显微结构,实验结果表明:Al2O3基泡沫陶瓷的抗压强度、抗热震性能随ZrO2加入量的增加先增加,而后略有下降。在ZrO2加入量为20%(重量)时制品的抗压强度及抗热震性能最佳,其最高抗压强度达2.31 MPa,1100℃热震循环次数为16次。