基于流固耦合的高陡边坡开挖稳定性研究

随着露天矿山开采深度的不断增加,边坡高度不断增高,采区内地应力场及边坡内孔隙水压力场因开采扰动而表征复杂,且它们对边坡稳定的影响起着不容忽视的重要作用,因此,准确地模拟分析真实边坡的稳定情况是一个亟待解决且复杂的问题。本文基于现场地应力及边坡内部水文情况的监测,结合实际工程地质结构,在数值模拟软件FLAC3D中建立三维有限元模型,带入物理力学参数,地应力场及水头高度等边界条件进行三维流固耦合分析。通过结合孔隙水压力,对比分析位移及塑性破坏云图可知边坡整体位移以沉降形式为主,位移值较小,且破坏主要发生在边坡的表层,边坡整体稳定性较好,但在坡脚、坡面、坡顶等处可能出现局部岩石崩落现象。     

移动智能网组网方式升级为目标网对业务发展的意义

本文对智能网的实现原理、组网方式和演进趋势进行分析和研究,对智能网的业务种类和发展状况进行介绍和剖析,而且,对于如何利用智能网应对各种非正常用户行为进行了初步探讨,认为智能网目标网升级对业务发展意义重大。     

从玫瑰花渣中提取玫瑰精油的技术研究

玫瑰鲜花用水蒸气蒸馏提取玫瑰油后,玫瑰花渣中还残留相当多的玫瑰精油。新鲜的玫瑰花渣经离心脱水后,用有机溶剂浸提,经浓缩、纯化,得到浓缩液,然后用分子蒸馏分离,可将花渣中残留的玫瑰精油提取出来。分子蒸馏采用二级蒸馏法。分子蒸馏脱除残留溶剂时,预热温度40℃,真空度10Pa,蒸馏柱温度45℃,蒸馏速度1.0mL/min,刮膜机转速300r/min;分子蒸馏脱除高分子物质时宜采用预热温度60℃,冷却温度25℃,蒸馏柱温度120℃,真空度1.0Pa,蒸馏速度1.0mL/min,刮膜机转速300～350r/min。     

"前膜后草"覆盖栽培对烤烟生长及产质量的影响

研究了"前膜后草"覆盖栽培对烤烟生长及产质量的影响。结果表明,"前膜后草"覆盖栽培方式在烟株生长前期能提高地温,促进烟株的早生快长,减少早花率;成熟期能保持土壤水分,降低地温,保持烟株的根系活力,提高上部叶的田间耐熟性;同时明显提高烤烟的产量、产值,对提高烟叶还原糖、降低烟碱含量也有一定的效果。     

China Drills Its First “Earth Hole“

On August 4, 2001, drilling of Kezuan-1 Well, the first continental scientific exploration well in China, was officially kicked off in Donghai County,Jiangsu Province. About 1000 people including high-ranking governmental officials and famous experts attended the drilling ceremony. Vice Chairman of the Chinese People‘s Political Consultative Conference Wan Guoquan pressed the button to start drilling of the exploration well.……     

PTT纤维染色工艺研究

采用Artelon Red系列染料对聚对苯二甲酸丙二醇酯(PTT)纤维进行染色,研究了其染色工艺,并对PTT纤维染色前后的力学性能进行了比较。结果表明:在相同温度和pH值条件下,PTT纤维对ArtelonRed AQE染料的上染率较Artelon Red W-3B染料的高;Artelon Red AQE染料,Artelon Red W-3B染料适宜的染浴温度分别为100,110℃,pH值均为7;当染色温度达到80℃后,升温速率缓和,可提高匀染效果;染色过程对PTT纤维强力的损伤影响不大。     

并行设计过程建模及优化

设计过程建模及优化对于缩短产品开发时间、提高企业的竞争力具有重大意义，本文提出了面向对象（Ｏ－Ｏ：Ｏｂｊｅｃｔ－Ｏｒｉｅｎｔｅｄ）的设计和并行设计过程建模方法，随后以二级圆柱直齿减速器的设计为例，介绍了以Ｏ－Ｏ过程模型为基础，以设计结构矩阵为工具的设计活动重组，并比较了重组前后所用时间，取得了明显的效果。     

Image/video spatial scalability in compressed domain

Image/video compression is widely used in various applications with the advent of the Joint Photographic Expert Group (JPEG), Motion Picture Expert Group (MPEG), and H.261 standards. Hence, most visual data are stored in the compressed format. Spatial scalable encoding of visual data has several applications, including browsing visual databases, querying multimedia databases, interactive multimedia communications, etc. We propose two novel techniques, namely, format compatible (FC) discrete cosine transform (DCT) and format modified (FM) DCT to implement image/video spatial scalability directly in the DCT compressed domain. The FC-DCT technique can be used to manipulate the standard bit streams, such as JPEG, MPEG, etc., while the FM-DCT technique can be employed in a variety of applications which require fast processing. In contrast to the traditional spatial-domain techniques, the compressed-domain techniques remove the unnecessary decompression and recompression procedures, thus, they have the advantages of reduced computational complexity and storage requirements. Simulation results demonstrate that the proposed DCT-domain techniques can achieve a comparable performance at a much lower computational complexity compared to the spatial-domain techniques     

进一步加强石化企业领导干部的廉洁自律

着重从当前集团公司系统领导干部廉洁自律的现状入手,针对存在的问题进行剖析,并就如何抓好企业领导干部廉洁自律提出对策。