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Based on wave propagation feature, this paper analyses 3D seismic migration algorithms such as alternating direction implicit method, LU decomposition method, and inverse operator approach method. The result shows that the alternating direction implicit method is fast but causes distortion in wave field extrapolation and affects image accuracy; however LU decomposition and inverse operator approach methods are fast while holding circular symmetry of wave field, and are promising in oilfield exploration and development.

在波的传播特征分析基础上，对交替方向隐式法、LU分解法、逆算子逼近法等三维地震偏移算法进行了分析研究，结果表明，交替方向隐式法虽然快捷但是在波场外推中明显产生畸变并影响成像的准确性，而LU分解和逆算子逼近法是保持波场圆对称特征前提下的快速算法，在油田勘探开发中具有较好的应用前景。

From energy balance equation, using micro-piece analytical method, heat balance equation for high power fast axial flow CO〓 laser tube is established with the boundary conditions of actual fast axial CO〓 laser, the analyzed solution of the temperature distribution in the laser tube is obtained.

并应用热传导的物理边界条件，求出了热能平衡方程的解析解，得到了实际器件放电管横截面内的气体温度分布公式及温度分布曲线，并求得了激光功率变化对热致负透镜焦距的影响关系式。

Institute of Plant Protection, Anhui Academy of Agricultural Science, Hefei 230031, China Abstract: The control effect of propiconazole microcapsule to postharvest anthracnose of apple and their application techniques at 25℃ and 10℃ in storage were studied. The results showed that the difference between the control effect with spraying and soaking were significant, the control effect of fast release for propiconazole microcapsule was better than that of slow release. The control effect of fast release for propiconazole microcapsule was 100% at 25℃ in storage, and was 86.8% 10℃ in storage.

安徽农科院植物保护研究所，合肥 230031 摘要：研究了在25℃和10℃贮藏条件下释放速度分别为快、中、慢的丙环唑微胶囊剂对苹果采后炭疽病的控制效果，结果表明：浸泡处理比喷雾处理的效果要好，释放速度快的比释放速度慢的控制效果要高，在25℃贮藏条件下15d的控制效果为100%，在10℃贮藏条件下控制效果为86.8%。

With Asynchronous Transfer Mode, Fast Ethernet, and FDDI, today's network planner has three completely different ways to accomplish essentially the same thing: getting data from one computer to another fast.

有了异步传输模式、快速以太网和FDDI，今天的网络计划人员就有三种完全不同的方法完成一件基本上相同的事情：快速地把数据从一台计算机送到另一台计算机。

National Forestry Corporation to policy-oriented and give full play to the advantages of private enterprises, and take the road of combination, the introduction of new varieties Poplar, gold-banded fast-growing grass, Atriplex canescens and other high-tech eco-products, and a large area throughout the country Promotion, a high starting point, high standard construction of fast growing high-yielding forest and pasture resources base, to the development of an investment recovery period is short, quick, significant benefits of the green industry, thus promoting regional economic development.

公司以国家林业政策为导向，充分发挥民营企业的优势，走强强联合之路，引进了新品种速生杨、天香速生牧草、四翅滨藜等高科技生态产品，并在全国范围内进行大面积推广，高起点、高标准建设速生丰产林及高产牧草资源基地，力求发展一个投资回收期短、见效快、效益显著的绿色产业项目，从而促进地区经济发展。

In addition, he thinks outspread brought profit margin drops can be accepted, because the company needs fast dilate to achieve fast growth, he predicts the increase as company hotel amount, the attenuant profit effect that opens a hotel newly to bring is met wear off.

此外，他认为扩张的带来的利润率下降是可以接受的，因为公司需要快速扩张来实现高增长，他预计随着公司酒店数量的增多，新开酒店带来的稀释利润效应会逐渐减弱。

Just a few days ago, while we were bantering, I told LY that he was a fast learner, because he had a wife who was so too, and he grabbed the chance to mock me: a fast learner, but a slow worker.

前些天，跟利源一番胡言乱语，我说他学东西学得快，因为他有个也同样聪明的太太，他却趁机说这太太虽然学东西学得快，做事却做得慢。

To fulfill a TV guidance system task of fast recognizing and tracking missile target from sequential images including multiple interferences,a fast segmentation and target characteristic extraction algorithm of sequential images based on binary image index map was proposed.After the sequential images were processed to binary images,a Field Programmable Gate Array was used to scan the binary image once and an index map was built,and then Digital Signal Processing was used to scan the index map once.

针对电视制导系统需从包含多个干扰目标的序列图像中快速识别和跟踪导弹目标的要求，提出了一种基于二值图像索引图的序列图像快速分割及目标特征提取算法，在序列图像二值化后，只需由FPGA对其遍历一次就可得到一张含有目标信息的索引图表，再由DSP对该索引图表边遍历边计算就可得到图像所含目标的数量、面积、质心坐标、二阶矩不变量等特征。

You've probably heard of Google Chrome and its blazingly fast speed, but just how fast is it really?

你可能有听说过 Google Chrome 这个预览器和它飞快的速度，不过，到底实际上有多快呢？

Thirdly , in the light of the demands ' that the large - scale photoelectric tracking and sighting equipment now available ask for fsm and the specific demands of the fast - steering mirror , designs a set of shaftless rapid controlling reflector system which impels manufacturing enterprises to bourgeon a suit of new productive processing method which differentiate completely from that of the axiferous fast - steering mirror system

由现有大型光电跟踪、瞄准设备对fsm的要求，结合对快速控制反射镜结构的具体要求，自行设计了一套完全区别于有轴系支承的新的生产加工工艺的柔性轴快速控制反射镜系统。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。