Analysis and Design of Conjugate Cam Shedding Mechanism with Dual Driving Shafts

The principle of conjugate cam shedding mechanism forthe outside tappets with dual driving shafts is discussed,and its design conditions and parameters are studied,giving the results of practical calculations finally.     

控制技术实验室建设与实验教学改革的思考

针对实验教学中存在的问题,提出了把“控制技术”实验室建设成全开放式实验室的基本思想和合理设计实验内容;把握预习关;加强辅导和巡视;建立预约登记和设备验收制度等建议。     

定心藤(Mappianthus iodoies)化学成分研究

从生长于云南省的定心藤属植物定心藤（Ｍａｐｐｉａｎｔｈｕｓ ｉｏｄｏｉｅｓ）中分离到一种新倍半萜醇，通过波谱方法和旋光度对比确定其为（－）－雪松醇。并应用２Ｄ ＮＭＲ技术确定了其分子中Ｃ，Ｈ化学位移的归属。     

A New Model of Damped Vibration Absorber

A new model for an untuned damped vibration absorber is put forward here in accordance with some actual mechanical structures,and its performance or responses to various system parameters of the model are also fully discussed.Generally speaking,machines should be designed to avoid working at their resonant frequencies.For some modern machines their working speeds often exceed their first even second resonant frequency,so,it is the same important for them to pass through their resonant frequencies steadily during starting or shutting down.In the paper the max peaks of the main system vibration amplitude and force transmissibility,as well as their corresponding peak frequencies are emphasized.     

Modeling of Solid-state Polycondensation of Poly (ethylene terephthalate)

A mathematical model has been developed to handle the reactions in Poly(ethylene terephthalate) (PET) undergoing polycondensation reactions in the solid state. The effect of temperature on chain mobility was considered to estimate the rate constants of chemical reactions. The polymer crystalline fraction is modeled as containing only repeat units, thus concentrating end groups and conden-sates in the amorphous fraction. This model is compared with PET reaction data with good results.     

在高校体育教学中如何培养学生的情感

本文从教育心理学的角度,阐述了在高校体育教学中,教师运用综合教学能力和艺术手段,去培养和沟通学生的情感,顺利完成教学任务,从而获得良好的教学效果的方法。     

机制专业实验教学改革思考

讨论了实验教学的重要意义，分析了传统实验教学存在的问题，提出了课程与实验教学模式的整合思路，对开放实验，综合设计等新的实验模式进行了理论探讨。     

Research on A Master - slave Multi - microcomputers Control System for Hollow Spindle Fancy Yarn Spinning Machine

In this paper, a successfully studied and developed master - slave muld - microcomputers control system based on PC - BUS for hollow spindle fancy yarn spinning machine, mainly Its overall scheme, software and hardware construction, is introduced. Spinning experiments show that the system achieves satisfactory result. This system can solve the diftkultles of mechatronical fusion between domestic hollow splndk fancy yarn spuming muchine and its microcomputer control technology.     

桑塔纳330K8BLOL柴油机轿车传动系统传动比的优化

对桑塔纳３３０Ｋ８ＢＬＯＬ型轿车以１．９ＬＴＤＩ柴油机为配套动力时，从动力性和经济性角度对传动系统的参数进行了优化，提出了合适的变速器传动比和主传动比．使用ＳａｎｔａｎａＬＸ五档变速器，且主传动比为３．８８９，可使轿车动力性有所提高，并且使油耗减少３０％左右．     

The Experience of Industrial Districts Construction in Yokohama City-A Useful Reference for Shanghai Urban Planning

Shanghai and Yokohama are very similar in the positions in their respective state economy and in the orbit of eco-nomic structure development. Since industrial districts in Yokohama city were established dozens years earlier than Shanghai, the experience of Yokohama must be very useful for Shanghai urban planning.