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本文论述了锚、网、梁、砼联合支护煤及半煤岩巷的机理、施工工艺及应用情况,分析了技术经济效果。 相似文献
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讨论了如何对IC项目和开发团队能力进行合理的度量和分析,以准确估计IC产品的交付情况,核心度量为项目进度、交付物规模、质量和成本。 相似文献
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本文研究了交趾黄檀中荧光物质的提取及主要参数的测定。通过采用不同极性的溶剂提取交趾黄檀的荧光物质,并对其所含的荧光物质利用荧光光谱仪进行定性、定量的分析,测得其最强激发波长与最强发射波长,实验发现对于交趾黄檀而言,无水乙醇在所用溶剂中对单一荧光物质的提取能力最佳,其提取的荧光物质的最强激发波长为298 nm,最强发射波长为330 nm,斯托克斯位移为32 nm。其他各种溶剂或因提取的荧光物质含量较少,或因提取的荧光物质种类较杂而不适合作为提取溶剂。 相似文献
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完全耦合的正倒向随机控制系统的最大值原理 总被引:6,自引:0,他引:6
The maximum principle for fully coupled forward-backward stochastic control system in the global form is proved, under the assumption that the forward diffusion coefficient does not contain the control variable, but the control domain is not necessarily convex. 相似文献
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In this paper,we mainly study a kind of risk-sensitive optimal control problem motivated by a kind of portfolio choice problem in certain financial market.Using the classical convex variational technique,we obtain the maximum principle for this kind of problem.The form of the maximum principle is similar to its risk-neutral counterpart.But the adjoint equation and the variational inequality heavily depend on the risk-sensitive parameterγ.This is one of the main difference from the risk-neutral case.We use this result to solve a kind of optimal portfolio choice problem.The optimal portfolio strategy obtained by the Bellman dynamic programming principle is a special case of our result when the investor only invests the home bond and the stock.Computational results and figures explicitly illustrate the relationships between the maximum expected utility and the parameters of the model. 相似文献
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首先运用经典动态规划方法,研究股票付息下国际证券市场中一类最优证券投资组合
和消费选择问题,并利用投资学理论对投资者只投资两种证券情形的最优组合给出经济分析和
解释.然后,运用非常简单和直接的方法对两种典型的效用函数给出最优解的显式形式,求解的
技巧来自解决线性二次最优控制问题的配平方法.最后,给出一些数值计算例子来展示各模型参
数对最优选择的影响. 相似文献
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具有干扰输入的不确定奇异系统的有限时间控制器设计 总被引:11,自引:0,他引:11
The concept of finite-time stability for linear singular system isinduced in this paper. Finite-time control problem is considered for linear singular systems with time-varying parametricuncertainties and exogenous disturbances. The disturbance satisfies a dynamical system with parametric uncertainties. Asufficient condition is presented for robust finite-ime stabilization via state feedback. The condition is translated to a feasibility problem involving restricted linear matrix inequalities (LMIs). A detailed solving method is proposed for the restricted linear matrix inequalities. Finally, an example is given to show the validity of the results. 相似文献
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研究一类带随机跳跃的完全耦合的线性二次随机控制问题. 得到了最优控制的显式解, 并可以证明最优控制是唯一的. 引入了一类推广的黎卡提方程并讨论了其可解性. 利用这一类推广的黎卡提方程的解, 得到了上述带随机跳跃的最优控制问题的线性状态反馈调节器. 相似文献
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1工程概况
东莞愉菀花园御龙住商住楼坐落于东莞市东城区愉菀花园水仙路,建筑总面积为45316.27m^2,其中地下面积为6767.80m^2,地面面积为38548.47m^2。工程地面以下平面基本为47.6m×99m斜长矩型平面。建筑主体地下两层为车库及设备用房,层高48m,其中一2层为人防工程, 相似文献
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