采用理论分析、数值计算等综合方法,研究了苇湖梁煤矿+579E2EB1+2急倾斜煤层(64°)高阶段(54m)综放面开采中出现的采空区顶板坍塌与气体超限的问题.现场开采试验表明,采取快速推进、控制均匀放煤、优化通风系统及主动综合防瓦斯等有效措施,遏制动力学灾害并确保安全开采

②③④⑤ ①系列名称,如0s,0N,2N等。 ②输入输出的总点数(4~128) ③单元类型:M为基本单元,E为输入输出混合扩展单元与扩展模块,EX为输入专用扩展模块,EY为输出专用扩展模块

采用有限元方法对非淹没缝隙射流冲击区单相对流换热进行数值模拟.结合辊式淬火冷却的特点,分析了缝隙射流冲击区对流换热的影响因素如射流速度、射流出口距冲击板的距离(高度)、喷嘴宽度、射流出口速度方向与冲击板之间的夹角、水温等.结果表明:在淬火100 mm厚钢板时,经济实用的工艺参数为射流速度40~45 m·s-1,射流出口距冲击板的距离(高度)20 mm,喷嘴宽度2 mm,射流出口速度方向与冲击板之间夹角45°,水温10~35℃

对转炉—RH真空处理一连铸生产焊接气瓶钢各个工艺阶段钢中非金属夹杂物的形貌、尺寸、组成及来源等进行了系统的研究.结果发现钢包渣与钢液作用而生成的夹杂物在浇注过程中可以从钢液中上浮去除,尺寸小于40 μm的角状和蔟群状的Al2O3夹杂物则难以完全从钢液中排出而滞留在钢中,从而构成铸坯中非金属夹杂物的主要来源.铸坯中T[O](14-16)×10-6之间,非金属夹杂物含量为0.09-0.15mg/kg,表明所生产的铸坯具有较高的洁净度

then there exists AE R\ such that (Kuhn-Tucker condition) G(s') =0 and 1. Lagrange Method for Constrained Optimization FOC: D.L(,\)=0. The following classical theorem is from Takayama(1993, p.114). Theorem A-4 (Sufficieney). Let f and, i= ,..m, be quasi-concave, where Theorem A-1. (Lagrange). For f: and G\\, consider the following G=(.8 ) Let r' satisfy the Kuhn-Tucker condition and the FOC for (A.2). Then, x' problem is a global maximum point if max f() (1)Df(x') =0, and f is locally twice continuously differentiable,or

６．１ 问题的提出 ６．2 凸集 ６．3 一般提法和几何意义 ６．4 单纯形法理论基础 ６．5 单纯形法和单纯形表格 ６．６ 改善的单纯形法表格 ６．７ 二阶段法与大M法 ６．8 退化情形及其他 ６．9 对偶原理 ６．10 对偶单纯形法

1 Getting Started 1 2 MATLAB Basics 8 3 Interacting with MATLAB 31 4 Beyond the Basics 50 5 MATLAB Graphics 67 6 M-Books 91 7 MATLAB Programming 101 8 SIMULINK and GUIs 121 9 Applications 136 10 MATLAB and the Internet 214 11 Troubleshooting 218

1Introduction 2Organization of This Paper 3Introduction to SVD and Waves—Sets of Point Sources and Receivers 4Introductory Example—Three Sources and Three Receivers 5Scalar Wave Examples with Point Sources and Receivers 6Mathematics of Continuous Functions, Operators, and Vector Spaces 7Communications Modes and Common Families of Functions 8Extending to Electromagnetic Waves 9Quantizing the Electromagnetic Field Using the M-Gauge 10Linear Scatterers and Optical Devices 11Mode-Converter Basis Sets as Fundamental Optical Descriptions 12Conclusions

1 EM optimization method 1.1 EM algorithm 1.2 Convergence 1.3 Usage in exponential families 1.4 Usage in finite normal mixtures 1.5 Variance estimation 1.5.1 Louis method 1.5.2 SEM algorithm 1.5.3 Bootstrap method 1.5.4 Empirical Information 1.6 EM Variants 1.6.1 Improving the E step 1.6.2 Improving the M step 1.7 Pros and Cons

§1紊流边界层的连续方程与动量方程 §2紊流动量扩散率εm的确定(紊流研究的主要目的) §3光滑管内的通用速度型(求解速度场) §4紊流换热(求温度场、h)