An Electronic Fuel Injection System Based the Monolithic Processor of MC68HC08

According to the motors working principle, the authors design and complet an electronic fuel injection system based the monolithic processor of MC68HC08. Then the authors complete a matching experiment of single-plunger fourstroke engine CG125 applying this system to the trestle. As the system used, fairly well has been settled the contradiction among the driving force of engine, the economization of fuel consumption and the letting of exhaust gas. After the testing, the power of motorcycle engine has increased about 10%, the oil consumption has decreased about 15 %, and the exhaust gas has decreased about 20%,     

Requirement Model Based on UML 2.0 for Equipment MIS

This paper introduces the modeling of Unified Modeling Language with use case diagram and active diagram based on Rational Unified Process for Equipment Managemet Information System. It discusses the modeling mechanism and character of UML and develops the Computer Equipment management Information System Based Web using Rational Rose of UML CASE Tool. First, it is describe the authors how to analyze the structure of organize and build the model of structure organize. Second, they abstract the workflow of main operation in organize and build workflow model by active diagram. Finally, they abstract actor, use case with case diagram and finish the requirement model.     

Key Technologies and Application Study on Networked Roadway Design Project Management

Aiming at the urgent requirements of project management from roadway design enterprises, key technologies and application of networked roadway design project management are studied. First, requirements analysis and a general technology scheme are proposed for networked roadway design project management. Next, key technologies are studied systematically, including workflow analysis and improvement, networked and dynamic project monitoring and coordinating, and integrated project information management. Based on the key technologies, an application system of networked roadway design project management is developed and applied in some real projects of roadway engineering design. A case study is presented to illustrate the management process based on the networked project management system. The engineering applications show that the system can effectively improve the management efficiency, reasonably configure and optimize design resource, monitor and coordinate project plan and schedule, and accurately evaluate the performance of design team members.     

Sales Management System''s Development Based on the Virtual Filiale Mode

Focusing on the varying status of the enterprise actual sales mode during the informationization of sales management, the authors put forward the virtual filiale mode for the development of the sales management information system, which is very helpful for increasing the flexibility and versatility of the sales management information system and satisfying the demands of sales management informationization of the enterprise sales mode of which is various. The authors also study the characteristics, function cell and application mechanism, at the same time this mode is applied in the practical development of the sales management information system.     

Implementation of the Computer Operating Exam System of Computer Graded Examination Based on C/S

This paper introduces an exam management system, which is applied to the Computer Operating Exam System of Sichuan Computer Graded Examination, aims at the shortage of existing exam ways and exam manager systems. The system bases C/S mode, use SQL Server as background database engine, use Delphi as foreground Development tool, includind data and exam management. It is an independent and comprehensive system, and also can band of existing exam manager system of Sichuan Computer Graded Examination. The system is proposed with emphasis on working-flow, frame, main functions and the solution ways of the key problems.     

Fracture Occurrence Mechanism and Control Measure Research of Generator and Compressor Bracket

During a minibus's practical road driving and engine test rig test for vehicle and engine reliability, the phenomenon of generator compressor bracket fracture appears and leads the generator compressor crankshaft belt rupture. It seriously affects the vehicle's operation performance. The article carries through engine test rig test and analysis, using frequency and spectrum technology to identify the bad vibration source combining FEA. It also researches vibration's occurrence, formation, propaganda and fracture mechanism. Based on this, the authors put forward countermeasure, which improves the dynamic characteristic of the system, decreases the vibration intensity and avoides the fracture of bracket and belt.     

Techniques of Dynamic Mesh in the CFD Transient Analysis of an Engine

Four techniques of dynamic mesh are Spring-based Smoothing, Dynamic Layering, Local Remeshing and the ALE method in the CFD transient simulation of engine. Based on those techniques, The authors analyze the improved measure of technique of dynamic mesh in the CFD transient analysis of the engine and propose the combined technique of dynamic mesh based on the finite volume method which is appropriate for. The CFD transient simulation of engine. At last, the 2D dynamic mesh method is applied to the typical pent-roof engine and the paper simulates the transient 3-D flow field at the tangent inlet of engine by applying the combined technique of dynamic mesh based on the finite volume method. The result of the simulation agrees well with experiment.     

Research of the Ignition Timing System for Compressed Natural Gas Vehicle

Compared to bi-fuel engine,it uses completely CNG(Compressed nature gas) to replace diesel which can save more oil fuel than bi-fuel engine that reffited diesel engine into CNG engine. A 4102 diesel engine is refitted into CNG engine and a mechanical ignition timing system is designed by the method of gear and belt. The principles and the construction of the system is introduced and the characteristics of the design is analyzed. The system performed well and had good liability when run in a platform. Compared with the previous one, it kept higher dynamic character and emitted lower. It is a cheap one and can be use to reform the diesel engines.     

农业科研试验基地绩效评价体系研究

为进一步深化科研机构改革,尽快建设“职责明确、评价科学、开放有序、管理规范”的现代院所制度,根据新形势下农业科研试验基地的定位和职责,针对无目标约束的综合评价问题,提出了一套农业科研试验基地绩效评价的评价系统。采用模糊评价理论和数据库构建技术,设计开发了系统管理软件,实现绩效评价工作过程中的工作流程管理、评价指标管理和上报数据管理,从而实现绩效评审、计算评分、数据统计和结果发布等功能,并应用于新疆农科院试验基地的实际测度。测评结果符合新疆农科院试验场站发展的实际情况,能揭示出新疆农科院各试验基地在全院总绩效中的位次和贡献份额,为新疆农科院评优工作提供了依据,为绩效工资的发放奠定了基础,为中国农业科研试验基地的管理和发展能力评价提供了科学的方法。     

Intelligent Control to the Automatic Cruise System of AMT Vehicle

A dual closed-loop automatic cruise control system is proposed according to the properties of the AMT system with cruise control function inside, which is developod by the authors. The human simulated intelligent fuzzy control is applied to the inner loop of throttle position control while the conventional fuzzy control is applied to the outer loop of vehicle speed control. The scheme of the whole control system and the design process of the controller are presented. The experimental results show that with the proposed dual closed-loop control system, the unstable phenomena of engine speed can be eliminated and the throttle control responses fast without buffeting. Moreover, the system has the advantages of easy manipulation and reliable operation. The controller has the advantages of free of accurate mathematical model and easy to carry out and high robust and so on.     

Application of Sound Intensity Measurement Method in Spotting the Noise Source of Engine Surface

During the study of noise emitted by accelerating mini-vehicle control, using theory of sound intensity measurement, it is actualized spotting the noise sources with the mini-vehicle engine. In the procees of the contour of sound intensity and frequency spectrum analysis, main noises of the engine are from oil sump tank and delivery menifold shield and two-way branch exhaust pipe shield. These noises are produced from the engine combustion. According to all analysis, the authors bring forward methods of modifying structure of shield-shell parts and consider them as main methods of reducing noises.     

Designing and Experimental Study of Automated Mechanical Transmission

The authors analyze major factor influencing the vehicle starting and shifting character of electronic-control AMT. By taking the mini-vehicle of Chan'an Star as carrier, electronic-control hydraulic AMT is developed, comprehensive shift-control strategy and clutch joint-control strategy are constitued, and related factors affecting clutch joint disciplinarian are complemented. The authors also put forward control aim of engine speed in the process of vehicle start and shifting, and automatic control to engine speed is realized by adopting electronic throttle. A last tests on prototype vehicle start &shift are made under different working conditions. The result shows newly-developed automatic transmission system is of more satisfactory control effect.     

地理信息网格与数字农业建设刍议

网格技术是网络环境下海量数据管理和信息共享的有效方法。地理信息网格是网格技术在地理空间技术领域的应用,作为农业空间信息网格的基础,它是实现农业信息共享与服务的有效途径。地理信息网格在数字农业领域的广泛应用将深刻影响农业信息系统的规划部署、运行和管理机制,提高农业信息资源共享程度和使用效率,推进数字农业建设的步伐。     

兵团农场农业资源管理服务信息系统的设计研究——以农八师149团为例

为了提高兵团农场农业资源管理水平,实现农业资源数据的有效共享,为从农人员提供所需的农业信息服务,笔者根据新疆生产建设兵团新型农场的经营与管理体制,结合计算机数据库技术和GIS技术,以149团为调研单位,设计了兵团农场农业资源管理服务信息系统,分析了系统建立的必要性,阐述了系统初步设计方案,包括数据类型分析、系统概念设计、系统结构设计等,展示了部分系统应用实例图,建立了一个集管理功能和服务功能于一体的一站式农业资源管理服务信息系统,使兵团农场已有的农业资源信息能够统一存储、高效管理和便捷共享,同时动态地存入现时资源数据,提高了团场农业资源管理水平。     

Accelerated Vehicle Exterior Noise Control of Minicar SC6360B

This paper studyies the method of controlling SC6360B's accelerated vehicle Exterior noise. First, the main noise is found, which is from engine compartment and from exhaust noise by the identification of vehicle noise resource. Second, this paper carris out the farther noise identification experiment on engine and the insert-loss experiment on the exhaust gas muffler. In the end, the authors make sure that the noise is mainly infected by direct leaked noise from engine compartment, radiation-noise caused by the vibration of engine accessories and loud exhaust noise because the muffler has dficient elimination . The corresponding methods has been adopted according to the analysis. Through the test, the noise is lowered 2.5 dBA than it was and reach the new requirement.     

插电式混合动力汽车纯电动行进间启动发动机的平顺性控制

针对单电机插电式混合动力汽车在纯电动行进间电动机启动发动机时由于系统输出转矩变化进而引起整车冲击的问题,分析得到发动机点火时刻的不同及离合器接合状态的不同是造成转矩波动的原因。在此基础上,提出了基于离合器主、从动盘转速差和电机角加速度为输入量的离合器压力模糊控制的混合动力汽车模式切换动态协调控制策略,并对比了发动机目标转速点火和怠速转速点火的控制效果。最后通过台架试验以及实车道路试验对提出的控制策略进行了验证。结果表明,基于目标转速点火的协调控制策略能减小整车的冲击度。     

Calculation on Natural Frequency and Main Vibration Mode of Double-lined Type Mounting System

The vibration characteristic of engine mounting system is analyzed, the vibration model of engine mounting system is established, and calculation method of natural frequency and main vibration mode of mounting system is put forward. Then an engine mounting system with double - lined type isolator is presented. Isolation performance of engine mounting system is improved greatly by selecting elastic coefficient of isolator reasonably.     

Simulation Analysis on Decreasing Vibration of Motorcycle Engine Suspension System

With the development of high-speed and high-power, the motorcycle vibration from engine become one of the major factors affecting the performances of motorcycle. Elastic suspension structure is adopted between the engine and frame for the vibration during the process of designing a certain type of motorcycle with 200 cc engine in some enterprise.Through optimization of the suspension system performance parameters, inherent frequency of suspension system keeping away from the activated frequency of engine in common use is essential. Isolation performance is improved and the vibration is solved. As a result, the comfort is improved.     

System of Financial Management in Branch Organization of Web-based Firm in Different Place

Information technique,espcialling network technique on the development and application in the manufacturing firms,has made working activity of them from innner data processing to resource's controlment and management(united) by time and space gradually.Financing information in the firm is the foremost managing information,and how to manage the financing systems of ecedemic branch organizations of the firms compositively in the network environment is a crucial subject.This paper gives a supporting web-based system of finacial management,establishes the sturcture of this system and researches the key techinique on system exploit and inner financial system of firm based the need of finacial management in the most of firms when they place branch organization in different place.At last,the authors certificate this system effective and pratical through the real examples.     

Analysis of IC Management System of Computer Room

This paper analyzes the features of existing IC management system of computer room, deficiencies and new orientation in this domain. The structure and realization of a new system developed by the authors was introduced. Meanwhile, this paper analyzes the electronic school schedule. Finally, the features of new IC management system of computer room are analyzed.