The centre for health protection of the department of health today february 2 reported preliminary negative results for h5n1 in a 42 - year - old man , his 78 - year - old mother and another relative who had potential exposure to a chicken found with influenza h5n1 virus in sha tau kok 生署生防护中心今日二月二日证实,可能在沙头角曾与一只带有h5n1流感病毒的鸡只有接触的一名42岁男子,他的78岁母亲及另一名亲友,他们对有关病毒的初步测试呈阴性反应。
This paper describes the general design of p - e integration system , including the design of system structure , function model , communication model , communication protocol , and security . the detail of realizing the key technology of p - e integration system is particularly discussed . this system has been basically tested 主要介绍了p - e集成系统的体系结构、功能模型、通信模型、通信协议和安全措施的设计,并详细介绍了p - e集成系统中关键技术的具体实现,最后对系统进行了初步测试。
At first , it describes structure of the full - length prototype , manufacturing craft and prepare to work , including sting , sealing , wire tension and leak current measurement , mounting of the preamp , gas system , high voltage system , reduction of noise and so on . the construction of full - length prototype provided valuable experience and important reference to the besiii drift chamber . then good function of the full - length prototype was performed using 55fe 5 . 9kev x _ ray source . we can see that the uniformity of gas gain of the full - length prototype is well and it is effective for the compensation voltage to adjust the uniformity of gas gain of the boundary cells 为了初步测试模型的性能用55fe5 . 9kevx射线进行了气体增益的均匀性检测,随之用55fe5 . 5kevx射线初步测试了模型性能,对部分高压和补偿电压的设置进行了调整,验证了对边界场丝层加补偿电压能够有效地调节边缘层气体增益的均匀性,实验结果表明全长模型能正常工作并具有良好的性能。
And the working principle and circuit makeup of the optical transceiver are analyzed in detail . secondly , according to the actual requirements , optical transmitter and optical receiver were designed into a small module to carry out low - rate optical transceiver . finally , fundamental parameters of the optical transceiver are tested under existing conditions 本文在简述光纤通信原理的基础上,从最基础的光有源器件工作原理、特性入手,重点阐述了光收发一体模块电路结构以及工作原理,在此基础上根据实际情况设计了光发送、接收电路,实现了低速率光收发一体模块,并在现有条件下对该模块进行了初步测试。
In this paper , the preparing technological parameters , formation mechanism and structures of ( lithium ) vanadium oxides ( nanocrystalline vo2 , amorphous v2o5 , layered li1 + xv3o8 and inverse spinel linivo4 ) are systematically studied and discussed , and some properties of the products are measured as cathode materials for lithium ion batteries . the main results are as follows : ( 1 ) nanocrystalline vo2 has been successfully synthesized by a solution chemical reaction method in normal temperature and pressure . the procedure involves v2o5 reacts with koh to form k3vo3 in water and then k3vo3 is reduced with kbh4 around ph = 4 forming vo2 precipitation in aqueous 本文从实验与理论分析相结合的角度对(锂)钒氧化物(纳米vo _ 2 、非晶态v _ 2o _ 5 、层状li _ ( 1 + x ) v _ 3o _ 8及反尖晶石型linivo _ 4 )制备过程中工艺参数、结构和形成机理等方面进行了系统深入的研究,对(锂)钒氧化物电性能进行了初步测试,取得的主要结果如下: ( 1 )成功的在常温常压下通过溶液化学反应直接制得具有纳米结构的vo _ 2粉。
Finally , in the basis of development in hardware part and software part , this thesis presents the results of the primary tests and analyzes the causes of the existing errors . also the approaches to reduce the errors are discussed , for example , improving the accuracy of the elements , raising he sampling frequency and so on 最后,本文在研制软硬件系统的基础上进行了初步测试,并给出了相关初步测试结果,通过分析测试中误差存在的原因,得出进一步减小误差的疗法:提高软件数据处理的精度、增加采样频率和选用精度更高的元器件等。