查询词典 a block of

A parallel algorithm for certain real symmetric block-tridiagonal linear systems on distributed-memory multicomputers is proposed. This algorithm is based on the block factorization of the coefficient matrix. This algorithm is used to solving the block-tridiagonal linear systems resulted from the finite difference approximation to Poisson's equation with Dirichlet boundary conditions. Then we get a parallel algorithm which speedup tends to linear speedup.

7研究了一类实对称块三对角线性方程组的分布式并行求解，提出了一种基于块矩阵分解的高效分布式并行算法，将其应用于求解带Dirichlet边界条件的Poisson方程导出的块三对角线性方程组，得到加速比趋于线性加速比的分布式并行算法，理论上说，这也是并行算法的理想情况。

This hacker attack makes Wei lane net connects a company to appear to be embraced badly to extramural Internet exit, network of network of city land with certain boundaries is successive two days of almost complete block are broken, wei lane user of broadband of 400 thousand Internet cannot get online, at the same time major network appears inside 5 days successive block is broken or network discharge block, a large number of users cannot get online normally.

此次黑客攻击使潍坊网通公司通往市外的互联网出口出现严重拥堵，城域网网络连续两天几乎完全阻断，潍坊40万互联网宽带用户无法上网，同时大部分网络五天内出现连续阻断或网络流量阻塞，大量用户无法正常上网。21日上午，潍坊市网通公司机房部向潍坊市公安局报警。

Therefore, the purpose of this topic research is to set out from the sociological angle, carry on a creatively thorough research on the formation and development of this block in ancient times,specifically including its characteristics and the reasons for their formation, and the relationship between it and Fujian culture especially Fuzhou cultrue;and to firstly answer the question why there were so many famous people living in this block, thoroughly analyze the ultimate motivity that push its development in ancient times even its great achievement in modern times;so as to fill in the blank of this academic research,and to make people's know about this block more thoroughly and completely,and then realize that the great achievement that it had achieved in morden times was not a historical fortuity,but deeply relied on the base of historical culture.

因此，本课题研究的目的在于从社会学的角度出发，对古代三坊七巷的形成和发展进行深入的研究，具体包括它的特点、特点的形成原因，与福建文化特别是与福州文化的关系进行了首创性的研究，初步回答了古代三坊七巷名人辈出的原因，深入分析了推动古代三坊七巷不断发展直至近代取得辉煌成就的深层动力因素，从而弥补了国内此项学术研究的空白，使人们对古代三坊七巷的了解更加系统、深入，认识到它在近代的辉煌不是历史的偶然，而是有着深厚的历史文化底蕴作依托。

Therefore, the purpose of this topic research is to set out from the sociological angle, carry on a creatively thorough research on the formation and development of this block in ancient times,specifically including its characteristics and the reasons for their formation, and the relationship between it and Fujian culture especially Fuzhou cultrue;and to firstly answer the question why there were so many famous people living in this block, thoroughly analyze the ultimate motivity that push its development in ancient times even its great achievement in modern times;so as to fill in the blank of this academic research,and to make peoples know about this block more thoroughly and completely,and then realize that the great achievement that it had achieved in morden times was not a historical fortuity,but deeply relied on the base of historical culture.

因此，本课题研究的目的在于从社会学的角度出发，对古代三坊七巷的形成和发展进行深入的研究，具体包括它的特点、特点的形成原因，与福建文化特别是与福州文化的关系进行了首创性的研究，初步回答了古代三坊七巷名人辈出的原因，深入分析了推动古代三坊七巷不断发展直至近代取得辉煌成就的深层动力因素，从而弥补了国内此项学术研究的空白，使人们对古代三坊七巷的了解更加系统、深入，认识到它在近代的辉煌不是历史的偶然，而是有着深厚的历史文化底蕴作依托。

Experiments show that rhomb partitioning is more powerful in suppressing block artifacts than square partitioning, results in much higher reconstructed image quality, but takes longer encoding time; 2 For solving exhausting encoding problem of fractal image coding, we present a fast rhomb-partitioning fractal image coding based on neighbor-searching; we present a fast rhomb-partitioning fractal image coding based on block classification; we present a fast square-partitioning fractal image coding based on neighbor-searching, block classification and wavelet transform.

2针对分形图象压缩编码过程非常耗时的致命弱点，提出了基于邻域搜索的菱形块分割的快速分形图象压缩编码方法，提出了基于块分类的菱形块分割的快速分形图象压缩编码方法，提出了基于邻域搜索·块分类和小波变换的方块分割的快速分形图象压缩编码方法，实验结果表明，我们提出的快速分形图象压缩编码与传统的分形图象压缩编码相比，编码速度提高了近40倍。

The stack type reactor according to the present invention comprises an upper block including at least two inlets through which different kinds of raw substances are entered and a lower channel communicated in fluid with the inlets and formed a lower surface thereof; and an unit block including an upper channel corresponding to the lower channel of the upper block and formed on an upper surface thereof, the unit block including a lower channel formed a lower surface thereof and communicated in fluid with the upper channel via a connecting flow passage penetrating therethrough.

根据本发明的堆叠式反应器包括：上部块，其包括至少两个允许各种原料物质进入的入口以及与该入口流体连通且形成于该上部块下表面的下部通道；和单元块，其包括与上部块的下部通道对应且形成于单元块上表面上的上部通道，该单元块包括形成于单元块下表面且经由穿透其中的连接流道流体连通上部通道的下部通道。

After interpreting natural earthquakes since 1953,the author also did a exploratory research on the lithospheric tectonic relationship of South Tienshan orogen,and considered in west and east side,West Kunlun orogen and Tafim block,and considered that Tarim block subducts beneath the West Kunlun orogen and South Tienshan orogen in two direction;In Pamir area,a syntaxis formed with the West Kunlun orogen obducts upon the South Tienshan orogen,and result in the two great orogens that rejuvenated during Cenozoic and the subduction and jointing relationship of the two orogens and Tarim block,showing a specific basin-and-range coupling system.

5通过对天然地震剖面的解释，探索了南天山造山带、西昆仑造山带和塔里木地块的岩石圈大地构造关系，认为在东西两侧，塔里木地块为南北直接俯冲于西昆仑造山带和南天山造山带之下的双向俯冲模式；在中部地区，西昆仑造山带在帕米尔地区形成构造结并仰冲于南天山造山带的前陆冲断带之上，形成了两个新生代复活的巨型造山带，以及两大造山带与塔里木地块之间的俯冲和对接关系，形成了独特的&盆一山&耦合体系

10 Rad/a, 2.15×10^(-9) rad/a, 1.45×10^(-9) rad/a, respectively. The activity of the Qaidam block, Ganqing block and Chuandian block is stronger than that of the stable South China block and Indian-China block. Every block rotates clockwise around the east of the Himalayan syntaxis.

柴达木地块、甘青地块、川滇地块活动性较强，而华南地块、印支地块活动性较弱，属于稳定地块；各块体围绕东喜马拉雅构造结呈顺时针旋转。

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

The invention discloses a device for spreading machine docking with trucks, which consists of damping mechanisms installed on both side between the spreading machine and the roller; the damping mechanism consists of side plate 1, sliding block 2, flexible element 3, and shaft 4, the flexible element 3 is sleeved on the shaft 4 of which one end linked with spreading machine and the other with sliding block 2, side plate is on upper section of sliding block 2 and fixed on the machine, lower section of sliding block is linked with roller.

本发明公开了一种摊铺机与卡车对接缓冲装置，它为设置于摊铺机机身前端与推滚之间的左、右各一副阻尼机构(10)；所述阻尼机构(10)包括端板(1)、滑块(2)、弹性元件(3)和轴(4)，弹性元件(3)套于轴(4)上，轴(4)的一端与推铺机机身(5)相连，滑块(2)与轴(4)的另一端相连，端板(1)位于滑块(2)上段之外，并固定于推铺机机身(5)上，滑块(2)的下段与推滚(6)相接。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。