查询词典 random access memory

The boundary of analytical model and statistical model is clearly divided in this performance model, and evaluation accuracy is improved. Secondly, based on embedded SRAM performance hybrid model, this article adopts bionics algorithm-ant algorithm to optimize hierarchical embedded SRAM structure. This method which adjusts memory system structure improves memory system performance. Finally, considering the factors such as memory cell area, power, delay and reliability, this article establishes static 6-T memory cell area, power, delay and static noise margin equations, analyzes 6-T memory cell device dimension constraints under "read upset" and "write upset", then proposes a method to enhance embedded SRAM performance by optimizing 6-T memory cell size. In order to realize embedded SRAM design and verify proposed optimization methods, this article takes the Garfield202 system chip as the platform, which embeds A720T processor and 20KB Scratch-Pad memory.

首先针对嵌入式SRAM结构，采用多元线性回归方法分析SRAM宏单元性能指标，采用解析方法分析控制电路延时，结合以上这两种方法建立嵌入式SRAM性能混合模型，该模型清晰划分两种建模方法的各自适用范围，提高了模型精度；其次以该混合模型为基础建立存储体性能目标函数，采用仿生优化算法—蚂蚁算法优化嵌入式SRAM结构，使之达到最优设计；最后综合考虑面积、功耗、速度以及可靠性等因素，建立静态6-T存储单元面积、功耗、延时以及静态噪声容限方程，分析了&读破坏&和&写破坏&的晶体管尺寸约束，优化了6-T存储单元尺寸，提高了嵌入式SRAM性能。

Finally we should note that main memory, magnetic disks, compact disks, and magnetic tape exhibit decreasing degrees of random access to data. The addressing system used in main memory allows rapid random access to individual bytes of data.

由此可知，主存储器，磁盘，光盘和磁带依次表示随机存取程度降低的设备，主存储器里所用的编址系统可允许快速随机地存取某个字节。

Lead lanthanum zirconate titanate exhibits many desirable optical and electrical properties such as ferroelectricity.dielectrics and holds great promise for wide applications in ferroelectric random access memory and dynamic random access memory.

锆钛酸铅镧具有良好的铁电介电和光学性能，在铁电存储器、动态随机存储器等方面应用前景广阔。

An improved shceme for the old double-way authentication access control scheme based on Harns digital signature is proposed. The new double-way authentication protocol of the improved access control scheme can prevent man-in-the-middle attack and replay attack. After strict formal analysis with BAN logic, the result have proved that the authentication protocol is secure. The improved access control scheme is realized by the mode of single-key-lock-pair. Under new access control scheme, user can own several kinds of access right upon one file under the new scheme without the supposition that the access rights is increase by degrees, and the possibility of overflow problem is significantly reduced by our new method

作为对原双向认证访问控制方案的改进，改进后的双向身份认证协议可以很好的抵抗中间人攻击和重放攻击，经过严密的BAN逻辑形式分析和论证，结果表明该协议是安全的；改进后的访问控制方案用单钥-锁对方案实现，除保持了一般单钥-锁对方案的良好动态特性外，在不需要访问权限递增假设下，实现了用户对文件的多种访问控制权限，并大大减小了溢出问题的发生可能

The method includes the following steps: step A, the terminal accesses, registers and loges on to IM core net through at least two different wireless IP access networks; step B, in the process for carrying a VoIP communication through at least one of two IP access networks, if the terminal meets the pre-set switching condition between the IP access network, a switching request in the IMS domain is initiated; step C, the speech calling continues application server receives the switching request, and switches the signaling between the terminal and the VCC application server to the other IP access network except the IP access network loading the VoIP communication at present in at least two IP access networks.

本发明提供一种IMS域内VoIP的切换方法、IMS系统、终端及VCC应用服务器，该方法包括：步骤A，终端通过至少两个不同的无线IP接入网接入并注册登录到IMS核心网；步骤B，在终端通过至少两个IP接入网中的一个进行VoIP通话的过程中，如果终端满足预设的IP接入网之间切换条件，则发起IMS域内的切换请求；步骤C，语音呼叫连续应用服务器接收切换请求，并将终端与VCC应用服务器之间的信令切换到至少两个IP接入网中、除当前承载VoIP通话的IP接入网之外的其中一个IP接入网上。

In the second aspect, a systematic study is made on random ambiguous point、random asymptotic ambiguous point、random intrinsic value and random intrinsic element of random operator.

在随机非线性算子与随机算子方程方面，深入研究了随机不动点的存在性与随机算子方程的随机解。

Introduce the concept of random regular function and random potential function at first, a necessary and sufficient condition of random potential function for denumerable Markov chain in random environment is provided, and the unique decomposition property of nonnegative random super-regular function is discussed.

首先引入随机位势函数的概念，给出随机位势函数的一个首要条件，进而讨论非负随机上调和函数的唯一分解性。

The dynamic characteristics of stochastic truss structures and stochastic frame structures are analyzed by using Random Factor Method. Then, from the expressions of structural random response of the frequency domain, the computational expressions of the mean value, variance and variation coefficient of the mean square value of the structural displacement and stress response under the stationary random excitation or non-stationary random excitation are developed by means of the random variable's functional moment method and the algebra synthesis method.

考虑压电智能桁架结构物理参数、几何参数、结构阻尼和外荷载、闭环系统控制电压分别或同时为随机变量，构建了结构在随机力作用下的动力响应分析模型，提出了求解方法，推导出结构动力响应随机变量的数字特征计算表达式，通过算例验证了所建模型和所提求解方法的正确性和有效性。

Random recursive set; random self-similar set; random sub-self-similar set; random walk in random environment; skew product Markov chain; frac-tal set

随机递归集；随机自相似集；随机次自相似集；随机环境中随机游动；绕积马氏链；分形集

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。