Introduce the structure of USB audio device and the structure of USB audio driver, discuss the function endpoints of USB audio peripheral, the USB audio descriptors, the USB audio request and the synch mechanism for USB audio stream detailly, bring out a new synch method called plesiochronous communication for USB audio stream speed matching.
An important resolution is keeping information about the I/O access pattern while the I/O requests are being passed from the application to network driver, and make use of the information to enhance I/O performance.
Java Servlet,JSP are used to realize the conversion of users requests; JDBC is used to realize the direct Web visit to the database; and Java's characteristic of being independent of the platform is used to develop the trans-plafform data sharing system.
We put emphases on the research of DSR_T ( Distributed State RecoveryTechnology ) and CFS_T ( Continuous File Service ) techniques in DFS_HAL model, put forwardthe transfer-controlling policy in DSR_T, sufficient conditions to satisfy service continuity, and theheuristic requesting algorithm of meta data operation in CFS_T.
重点研究了DFS_HAL模型中的DSR_T ( Distributed State Recovery Technology )和CFS_T( Continuous File Service )技术,提出了DSR_T技术中的中转控制策略、满足服务连续性的充分条件和CFS_T技术中的元数据操作探寻请求算法。
Adopted the fast development tool Jbuilder8.0, the application carry out theprocession of a service's publishing and requesting with the packages of JXTA2.0and the classes programmed by myself. This service is deployed in the local throughApache Axis1.2RC2,meanwhile Tomcat5.0.5 act as the service's servlet containers.
According to the studies on patterns (Saville-Troike 2003: 11) and Webster's Third New International Dictionary (1976: 1657), and the present study, the pattern of request may be defined as an established mode of requesting held in common by the members of a group and given meaning from culture.
Simultaneously, the minimization of the axiom group, which requests that each axiom is an equation and independent, is proved.
In solving the problem of synthesis, for the efficiency criterion use is made of a minimum of the total time of the loading and testing of TPDBs and also the service of a set of requests of users.
The value of the network critical load is found; in the critical load, asymptotic probability distributions for states of the information transmission channel and for the number of requests in the source of repeated calls are found.
It is proved that distributions of the normalized number of requests belong to the class of normal and exponential distributions, and it is shown how conditional normal distributions pass in the limit to the class of exponential ones.
An example of analysis of priority collection and processing of requests for airspace use in a centralized flight scheduling service established for the united system of Russian air traffic control is given.