THE ANALYSIS OF THE SEPARATED LAYERS ALGORITHM BY DOMAIN DECOMPOSITION METHOD

From the principle of of the Domain Decomposition Method (DDM), we analyse the 2nd-order linear elliptic partial differential problems and link the Separated-Layers Algorithm (SLA) with DDM. The mathematical properties of SLA and numerical example are presented to obtain satisfactory computation results. For general linear differential ones, also are the structure of SLA and its characteristics discussed.     

我的九条命

在我生命中各个阶段里，我与学术界不知不觉地频频有缘。启蒙时期，我科到名师的熏导业已浸淫于国学；经史子籍，无所不读，撰文作诗，直追唐宋，俨然是一个“小老学究”。当我入仕时，一秉传统士大夫的志趋，一心为国为民，在我自我流放期间，发现我唯一可谋生的本领是学术，我既没有继承万贯家财，也没有在当权时放出许多人情，作为经商的捷径，实际上，我曾试探经商之路，但是在没有有力的后台引见下，我意识到，要加入一家企业，条件是能够为其带来多少商机，我对这种用才标准并不欣赏，在此情形下，要做一个小企业家，其生活方式也难以适应，特别是对我的妻女是一种冒险。     

印度卡达姆帕阿伊坝渗漏问题的补救处理

印度在卡达姆帕阿伊坝上游坝面采用PVC薄膜补救该坝的渗漏问题。这是印度首次采用这种办法防渗,补救工程取得成功。     

世界面临着食品危机吗？

世界面临着食品危机吗？Ｄ·盖尔·约翰逊最近，有人断言，过去半个多世纪以来世界食品供给总体来说顺利增长的趋势已经或将在不久的将来发生逆转。这种悲观的观点主要是基于对近年来以下几种趋势的解释：自１９８５年以来，世界人均粮食产量不断下降；全世界粮食储备估计...     

THE APPLICATION OF COKELET''''S WAVE THEORY IN THE CALCULATION OF WAVE-CURRENT FIELD

By using Cokelet's wave theory,the limiting wave height and the relative waveangular frequency in wave-current field were calculated in this paper.It is indicated by numeri-cal calculation that if the water depth is not too small,the result given by authors'calculationare very close to the results of limiting wave height by Dalrymple(1975)and to the data of rel-ative wave angular frequency by linear wave theory;but if water depth is rather small,thereare some discrepancy,     

NUMERICAL SIMULATION OF PARTICLE SEPARATION IN AN OIL-SAND SEPARATOR

ＮＯＴＡＴＩＯＮＳＡ　Ａｒｅａｏｆｉｎｌｅｔ ,ｍ2ａ　Ｃｅｎｔｒｉｆｕｇａｌａｃｃｅｌｅｒａｔｉｏｎ ,ｍ2 /ｓｉ　Ｇｒｉｄｏｆａｘｉａｌｄｉｒｅｃｔｉｏｎｍｌ 　ＭａｘｉｍｕｍｇｒｉｄｎｕｍｂｅｒｏｆｒａｄｉａｌｄｉｒｅｃｔｉｏｎＱ　Ｆｌｕｉｄｍａｓｓｒａｔｅ ,ｍ3/ｓＲｃ 　Ｍａｘｉｍｕｍｒａｄｉｕｓｏｆｃｙｃｌｏｎｅ ,ｍＲｅ　Ｒｅｙｎｏｌｄｓｎｕｍｂｅｒｒ　Ｄｉｍｅｎｓｉｏｎｌｅｓｓｒａｄｉａｌｄｉｓｔａｎｃｅｔ　Ｄｉｍｅｎｓｉｏｎｌｅｓｓｔｉｍｅｕ　Ｄｉｍｅｎｓｉｏｎｌｅｓｓａｘｉａｌｖｅｌｏｃ…     

拉格兰德二级电站严重汽蚀问题的解决

格拉兰德二级电站由多米宁工程公司供货的第一台机组,投入运行后3000小时就发现了严重的汽蚀问题。经几次对原型机组进行修正无效,为了尽快解决问题,进行了一系列模型试验。通过花费了几个月时间作的这些试验,得到了非常满意的简单易行的解决办法。     

RECENT PROGRESS IN CAVITATION RESEARCH IN THE INSTITUTE OF HIGH SPEED MECHANICS TOHOKU UNIVERSITY

Recent activities on cavitation research in the Institute of High SpeedMechanics,Tohoku University,Japan are reviewed.Firstly,our recent researchproject on cavitation occurrence in various liquids other than water is explainedin relation to the thermodynamic and gas content effects.Secondly,study oncavitation damage is introduced.In this field,the mechanism of a single bubblecollapse near solid wall and the related pit formation in soft test materials havebeen investigated.Also,the effects of fluid properties on the cavitation damageare clarified.Finally,a special study on shock wave propagating through gas-liquid two-phase magnetic fluid is explained to extend further developments ofcavitation research.     

奥林奇县水库二维溃坝洪水流量分析

二维溃坝模型已用来预测奥林奇县水库下游冲积扇的淹没范围。这个模型是以浅水长波的连续方程和动量方程的扩散形式为基础的。而控制方程是用显式数值方法求解的。与一维模型比较,二维模型可以预测更大的淹没范围。     

伏尔加—卡马梯级水库调度方式的变动对航运条件的影响

在国民经济蓬勃发展条件下,自然资源(包括水资源)多部门的综合利用是极其重要的。在伏尔加河流域水资源有限的情况下,正是通过这一途径满足国民经济部门和居民用水量日益增长的需求。