Saw transmission speed is one of the most important indexes in all characteristic parameters about piezoelectric wafer , directly deciding resonator frequency of the device . therefore , knowing about saw transmission speed and it ' s consistency in batches of saw producing looks like very vital 在压电基片的各项性能中, saw的传播速度是最重要的指标之一,它直接决定了器件的谐振频率,所以在saw器件的批量生产中了解基片声表面传播速度及其一致性显得非常重要。
Besides , in order to overcome the obstacle that more pictures in webpage result in slower network transmission speed , we have a discussion on image compression technology in this paper . jpeg method , wavelet transform method and fractal method are introduced here . we program software to realize these two methods and to compare their capacities 此外，为了克服图片对网络传输速度的影响，本文还对图像压缩技术作了一定的探讨，介绍了jpeg方法、小波变换方法和分形方法在图像编码中的应用，并用软件实现了这三种压缩，对它们的压缩效果进行了比较分析。
By utilizing the main advantages of orthonormalization and power conservation from hilbert transformation , it is found that bit error rate is close to that of dcsk system , but transmission speed is one time higher than that of dcsk system , and the system ' s output variance is effectively reduced 基于qpsk的思想，引入qcsk调制方式，利用hilbert变换对正交且能量守恒的特性，有效减小了系统输出的方差，较dcsk系统，传输速率提高一倍，系统误比特率与dcsk系统相近。
As a new bus standard in computer peripheral hardware , usb is adopted and widely used in virtual instruments for its ease of use , true plug and play , power supply from bus , high transmission speed , etc . the purpose of this project is to design and develop a virtual instrument that can test and display semiconductor transistor output characteristics curve , instead of tradition instrument which has being used in labs by now 而usb总线作为一种新兴的计算机外设总线标准,由于易用、支持热插拔、总线供电、传输速率高等特点,已经在虚拟仪器当中得到采纳与普及。本文介绍了一种实现晶体管特性曲线测量的虚拟测试仪器的设计和制作方案,其可用来取代目前在实验室中使用的老式的晶体管特性图示仪。
Speaking at the ceremony , mr tang said that with the exponential growth in the number of internet users worldwide and the ever expanding range of web - based applications and services , improvement in the quality of internet service in terms of transmission speed , reliability and system capacity was something that users looked forward to , and those in the academia and industry were working towards 唐英年在仪式上表示，随著全球互联网使用人士数目急速增长，以及各种网上的应用程式及服务迅速增加，使用人士期望互联网的服务质素，包括传送速度、可靠程度、系统容量方面，都会有所改善。这亦是学术界及业界致力达成的目标。
1 communication protocal is adopted between the transmission of pc and telephone terminal . usb is flexible , stabile , pnp and high - speed ( l2m / s ) , so it truly satisfied and realized the need of this system especially met the need of little audio data packet and high transmission speed . as we al 1 know , 开发了usb接口，采用了usb1 . 1通信协议编写了pc机与电话终端的通信软件，利用usb灵活、稳定、即插即用、主从结构、速度快( 12m s ) 、成本低廉的特点解决了语音数据包小、传输速度快的问题；应用udp ip协议编写了pc与pc机的网络通信软件；利用sqlserver2000编写了基于ado技术、 c s模式下的电话用户资源信息库软件，通过以上技术达到了本系统的目标和要求。
As far the trend of fiber - optic communication systems is to obtain higher capacity , and higher transmission speed . the intensity modulator is widely applied to a lot of fields . it is necessary for the intensity modulator subject to the laser pulse rectification systems that should be provided with following performances as high speed signal transmission and quick response and so on 光纤通信向着大容量、高速宽带方向发展,光纤延迟线系统要求强度调制器具有高速信号传输、快速响应的特点,因此以linbo _ 3为衬底材料的集成光学强度调制器具有十分良好的应用前景。
