摘要：随着互联网产业和技术的不断发展,各型各色的基于互联网页面的Web应用也成为人们获取信息、娱乐、服务等的重要途径之一。这就对各个Web应用系统的性能提出了高要求。文中对Web性能优化技术中的Local storage的存储性能进行了研究与分析。针对技术本身存在的性能问题,设计了一系列实验来进行验证,探究解决性能问题的方案。实验发现,对Local storage存储空间频繁访问,会对系统性能造成较大影响。针对实验所暴露的Local storage所存在的性能问题,文中设计了对Local storage存储性能改进的方案,并根据该方案,对Local storage的存储结构进行了改进。以解决因对Local storage存储空间频繁访问所造成的系统效率降低。

摘要：针对嵌入式系统与PC主机大量数据传输的需要,使用SD卡做为存储介质设计实现USB Mass storage类设备。主机和存储设备之间的通讯严格按照USB2.0协议和USB Mass storage类存储协议,该类存储设备构架于USB2.0协议之上,将存储命令嵌于USB协议之中。采用MAX3421作为USB外设控制器,MCF52233作为主控制器,通过SPI接口实现两者的通讯试验结果表明,当MCF52233主频为60MHZ时,存储速度可以达到1.87 Mbyte/s,满足了设备与主机数据交换速度的要求。

摘要：大容量的存储空间以前可能只是电脑硬盘的特长和专利，而生活内容的丰富和多样化对存储器提出了更全面和苛刻的要求，因为需要大数据量记录的地方不只在电脑上，几乎每一种影像、音视频等设备都需要大容量的存储器来满足未来的生活方式，当然内置存储器的设计要比扩展存储设备方便很多。

摘要：M80是佳能第一款装备液晶显示屏的数码伴侣,它采用了3.7英寸液晶显示屏,内置80GB硬盘,可以读取CF卡以及SDHC/SD卡,具备PictBridge接口。M80主要潜在用户群是那些拥有佳能EOS单反数码相机的用户,M80的按钮布置和菜单设计都和EOS单反很相似,具有极其鲜明的特点。

摘要：随着国内数字高清技术的发展,采用数字高清技术来进行拍摄编辑的电视台和电影公司越来越多。相应地,高清存储系统的需求量也越来越大,满足高清编辑存储要求是今后国内电视媒体公司及多媒体网络发展的方向和目标。高清素材相对于其他类型的数据在存储质量、效率、速度，传输质量等方面有更高的要求，需要量身定制的解决方案．尤其是”高清”奥运会的到来，电视节目量巨增，数据量不断增长，保证数据的访问性与可靠性无疑对存储系统的数据整合、数据稳定以及数据的共享提出更高的要求。

摘要：This work is concerned with the problem of L2 gain disturbance attenuation for nonlinear systems and nonlinear robust control for power systems. In terms of the recurrence design approach proposed, the nonnegative solution of dissipative inequality and the storage function of nonlinear H∞ control for a generator excitation system are acquired. From this storage function, the excitation controller is constructed. Moreover, simulation results manifest the effectiveness of this design method.

摘要：The stability and reactivity of nanomaterials are of crucial importance for their application, but the long-term effects of stability and reactivity of nanomaterials under practical conditions are still not well understood. In this study, we first established a comprehensive strategy to investigate the stability of a highly reactive nanomaterial from the viewpoint of reaction kinetics with ultrathin tellurium nanowires （TeNWs） as a model material in aqueous solution through an accelerated oxidation process. This allowed us to propose a new approach for the design and synthesis of other unique one-dimensional nanostructures by a chemical transformation process using the intermediate nanostructures ＂captured＂ during the dynamic oxidation process under different conditions. In essence, the oxidation of ultrathin TeNWs is a gas-solid reaction which involves liquid, gas and solid phases. It has been demonstrated that the oxidation process of ultrathin TeNWs in aqueous solution can be divided into three stages, namely oxygen limiting, ultrathin TeNWs limiting and mass transfer resistance limiting stages. The apparent oxidation kinetics for ultrathin TeNWs is approximately in accord with a first order reaction kinetics model and has an apparent activation energy as low as TeNWs are thermodynamically unstable 13.53 ***^-1, indicating that ultrathin However, the unstable nature of ultrathin TeNWs is actually an advantage since it can act as an excellent platform to help us synthesize and design one-dimensional functional nanomaterials--with special structures and distinctive properties--which are difficult to obtain by a direct synthesis method.

摘要：随着国内数字高清技术的发展,采用数字高清技术来进行拍摄编辑的电视台和电影公司越来越多。相应地,高清存储系统的需求量也越来越大,满足高清编存储要求是今后国内电视媒体公司及多媒体网络发展的方向和目标。高清素材相对于其他的类型的数据在存储质量．效率、速度，传输质量等方面有更高的要求．需要量身定制的解决方案。

摘要：技术概要：主要应用SoftDSP的高速模拟／数码信号处理技术和软件设计技术而开发的SDS200A拥有很多高科技优势：200MHz模拟频带宽度、5GS／s等价取样速度、各种高级Trigger功能、

摘要：The current research of supporting and transmission system in flywheel energy storage system(FESS) focuses on the low consumption design. However, friction loss is a non-negligible factor in the high-speed but lightweight FESS energy and momentum storage with mechanical-type supporting system. In order to realize the support system without mechanical loss and to maximize the e ciency of the flywheel battery, a permanent magnet biased magnetic bearings(PMBMB) is applied to the FESS with the advantages of low loss, high critical speed, flexible controllability and compact structure. In this frame, the relevant research of three degrees of freedom(3-DOF) PMBMB for a new type FESS is carried out around the working principle, structural composition, coupling characteristics analysis, mathematical model, and structural design. In order to verify the performance of the 3-DOF PMBMB, the radial force mathematical model and the coupling determination equations of radial two DOF are calculated according to an equivalent magnetic circuit, and radial–axial coupling is analyzed through finite element analysis. Moreover, a control system is presented to solve the control problems in practical applications. The rotor returns to the balanced position in 0.05 s and maintains stable suspension. The displacement fluctuation is approximately 40 μm in the y direction and 30 μm in the x direction. Test results indicate that the dynamic rotor of the proposed flywheel energy storage system with PMBMB has excellent characteristics, such as good start-of-suspension performance and stable suspension characteristics. The proposed research provides the instruction to design and control a low loss support system for FESS.