查询词典 optimal control

Then the great loss risk of hedger is avoided. based on expected-variance optimal model,the optimal model is set up by using the skewness parameter.

通过偏度约束控制了当收益分布向右偏斜时的重大损失发生的概率，解决了套保者遭受重大损失的问题。

Considering transaction cost, Hedger's attitude to risk, variance of foreign exchange rate , with Von Neumann Morgenstern utility function and Bernoulli principle, this paper analyses optimal hedging of the foreign exchange risk during the import/export with forward/future contracts, and the influence of the above mentioned factors on the optimal hedge rate.

本文在前人研究基础上，考虑交易费用，决策人对风险的态度，汇率相对风险大小等因素，用Von Neumann- Morgenstern效用函数和 Bernoulli决策法则建立了研究利用远期/期货和约做外汇套期保值问题的一般模型，然后具体分析了一种典型情况下的最优套期保值率的性质。

We investigate similar questions for other elliptic operators, such as the Schrodinger operator, non homogeneous membranes, or the bi-Laplacian, and we look at optimal composites and optimal insulation problems in terms of eigenvalues.

我们对相似的问题进行其他椭圆的操作者的研究，例如薛定鄂算子，非同类的膜或者双Laplacian，并且我们就eigenvalues而言看最佳的混合物和最佳的绝缘问题。

Isolation, purification and characteristics of D-hydantoinase were carried out. The experiment results showed that the optimal pH and temperature of pure D-hydantoinase were pH 8. 5 and 35℃, respectively. D-hydantoinase activity could be increased significantly by Mn〓 and Fe〓. Substrate specificity of D-hydantoinase on various hydantoin derivatives showed the optimal substrate of D-hydantoinase was 5-phenylhydantoin, but hydantoin, 5-methylthioehylhydantoin, 5-hydroxyphenylhydantoin, 5-methylhydantoin, 5-benzylhydantoin could also be hydrolyzed by D-hydantoinase.

本文还进行了海因酶的分离纯化及性质研究，发现酶的最适反应温度为35℃，最适pH为8.5，金属离子Mn〓和Fe〓能显著提高D-海因酶活力。D-海因酶的特异性实验表明，D-海因酶的最适底物为D，L-苯海因，其次为海因，D，L-对羟基苯海因和D，L-甲硫乙基海因，对D，L-甲基海因和D，L-苯甲基海因也有一定的作用。

The results showed that the optimal compositions of medium were 15 sweet potato starch hydrolyte, 0.40 (NH4)2SO4, 0.03 KH2PO4, 0.044 ZnSO4-7H2O, 0.025 MgSO4-7H2O, and that the optimal culture temperature and rotation rate were 32 癈 and 220 r/min respectively.

摇瓶发酵最佳培养基：甘薯淀粉15，(NH_4)_2SO_4 0.4，KH_2PO_4 0.03，ZnSO_4·7H_2O 0.044，MgSO_4·7H_2O 0.025。最佳培养条件为32℃，摇床转速220 r／min，装液量100mL／500mL三角瓶，发酵16h后一次性添加CaCO_370g/L。

And the use of linear time-structure optimal hyperplane method of implementation in the feature space for solving the optimal hyperplane.

然后利用线性可分时构造最优超平面的方法，在特征空间中实现最优超平面的求解。

This paper summarizes the domestic and overseas study status and developing direction of cam. On basis of the problem that the idler wheel which is the driven part of the cam machine in CT36-110 spring operating mechanism is destroyed easily, the author get much fact material through inner research, and presents a optimal design imagine of disc cam. Through enough compare and argumentation, this paper presents the optimal design model of the disc cam.

本论文阐述了目前国内外对凸轮的研究状况、发展动态和发展方向，根据云南开关厂CT36-110型弹簧操动机构中盘形凸轮机构的从动件——滚轮易损坏的生产实际，深入调查研究，在掌握大量生产应用实际资料的基础上，提出了对盘彤凸轮进行优化设计的思想，并在充分比较和论证的基础上提出了盘形凸轮的优化数学模型。

Through the techniques of fast propagation and explanting New Guinea Impatiens into soil, the optimal culture medium inducing bud and root and the optimal transplanting substratum were selected.

通过对新几内亚凤仙组织培养及入土移栽的技术研究，分别筛选出诱导芽分化的最适培养基和诱导生根的最适培养基。

An optimal heat transfer criterion was proposed, which means that the optimal heat transfer appears when the region outside the impellent thin spray film inscribes in the square heated surface.Based on the H criterion aforementioned, two DANFOSS nozzles of the three with inclined spraying angles were used to experimentally study the temperature distribution in the heated surface.

应用不同DANFOSS喷嘴对水平热源进行垂直喷射，在变换喷嘴距热源表面高度的前提下，研究最优换热性能出现在何种情况，得出H准则：当喷雾形成的液膜的圆形外推区域正好与热源边缘相切时，系统换热性能达到最佳。

Because the genetic algorithms could search the optimization of objective function randomly, which via the evolution of groups, our work is based on the embedding/detecting way of "DWT-Based Audio Watermarking Using Support Vector Regression and Subsampling". And this method provides a preliminary discussion on the application of GA, which searching the individual with the highest fitness of attack-resistance in the aggregate of the optimal embedding strength. As an optimization solution of obtaining the optimal embedding strength, it could achieve an adaptive policy, and find a reasonable balance between the robustness and inaudibility of the watermark, just for the better robustness and inaudibility in the algorithm.

遗传算法是通过群体进化来随机搜索目标函数的最优化问题，对于前述基于支持向量回归机的小波域数字音频盲水印算法，进一步地探讨采用遗传算在嵌入强度集合中搜索对抗攻击能力适应度较高的个体，从而得到最佳嵌入强度的一个优化方案，以实现自适应策略，也使本算法能在水印的鲁棒性和不可感知性之间寻找到合理的平衡点，从而具有更良好透明性和鲁棒性。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。