查询词典 optimal strategy

In the second chapter, the problem of the optimal inputting rate control for a class of competitive population dynamics system with age-structure is discussed. By means of characteristic line, Gronwall Lemma, Bellman Lemma, adjoint system and so on, the Lipschitz continuity properties of the system in terms of the control variable is certificated, and the necessary condition of the optimal control is obtained.

第二章讨论了一类具有年龄结构的竞争种群系统最优输入率控制问题，综合应用特征线法，Gronwall引理，Bellman引理，共轭系统等知识，证明了系统解关于控制变量的Lipschitz连续性，给出了控制为最优的必要条件。

By simplifying air spring mechanics model, We analyze the damping characteristics for air spring suspension system of single degree of freedom, then educe optimal damp of air spring suspension with throttle hole under various situation and optimal diameter of throttle hole. The capability opinion guideline of air spring suspension system is analyzed.

通过简化空气弹簧的力学模型，对单自由度有阻尼空气弹簧悬架系统的阻尼特性分析，得出带有节流孔的空气弹簧在各种工况下的最佳阻尼及节流孔的最佳直径，并分析了空气弹簧悬架系统的性能评价指标。

Multistep deposition process has been adopted in the preparation of superfine inorganic composite antibacterial powder, Ag~+ as crystal nucleus, packed outside by the hydroxid and phosphate precipitate of Ti and Zr elements etc., The optimal process conditions have been found from one-factor influence tests and multi-factor orthogonal test,and the optimal process conditions were: Ag iron was imported by silver ammine, and then 100ml Titanyl sulphate solution mixing with zirconium sulfate keep hot at 90 ℃ for 30 mins, and the Zr/Ti ratio is 0.15,and Na_2HPO_4 was added in the end.

超细无机复合抗菌粉体的制备采用以Ag~+沉淀物作为晶核，外包裹Ti、Zr等金属的氢氧化物沉淀和磷酸盐沉淀物的多步沉淀工艺，并利用单因素和正交试验法对制备工艺进行了优化，其最佳工艺条件是：Ag~+以银氨络合物引入，沉淀钛锆的反应时间为0.5h，反应温度为90℃，水解反应时体系总液量为100ml、Zr/Ti为0.15，沉淀物经水洗、干燥，于700℃煅烧4.0h；即得最终产品。

In the fourth chapter, the approximate optimal solution to the generalized time optimal control problem is considered in it.

第四章，讨论了带有时滞的广义时间控制问题的近似最优解问题。

This problem can be solved easily by optimizing each parameter independently—set the elevation to an arbitrary value and rotate the dish to its optimal azimuth, then rotate the dish to its optimal elevation without changing the azimuth.

这个问题可能由优选容易地解决各个参量独立设置了海拔对任意价值和转动盘对它优选的方位角，然后转动盘对它优选的海拔没有改变方位角。

His book is mathematically demanding, but it boils down to a few key concepts: there is an optimal f for every trade; if you bet less, your risk decreases arithmetically while profit decreases geometrically; if you keep betting more than the optimal f, you are guaranteed to go broke.

他的书用了很多数学计算，但最终总结为以下几点：每笔交易都有完美的 f；如果你赌的少，风险是数字式的减少而利润是几何级的减少；如果你投入的比最完美的 f 多，你肯定会破产。

The result demonstrates accent of true and false in 34 AD 34, inside diaphragm 27, the haematoma inside the wall interlining of model of 7;27 exemple is three-dimensional into resemble all showing clear crevasse, crevasse of aorta bend ministry with arrowy shape show optimal, fall aorta crevasse shows with position of axle and coronal shape optimal, VRT shows pathological changes whole journey is clearer, but reach to crevasse inside the indication of diaphragm reachs position of axle as MIP, MPR.

结果34例AD中显示真假腔34例，内膜片27例，壁内血肿7例；27例典型夹层三维成像均显示明确破口，主动脉弓部破口以矢状位显示最佳，降主动脉破口以轴位及冠状显示最佳，VRT显示病变全程较清楚，但对破口及内膜片的显示不如MIP、MPR及轴位。

Though comparing Canny operator and center B spline dyadic wavelet, the following conclusion is proven in this dissertation: a Center B spline function has tight support and Canny operator hasn't. b Center B spline function asymptotic convergence to Gaussian function and the derivative of Center B spline function asymptotic convergence to Canny operator. c The derivative of fourth order center spline B function is more suitable as a optimal edge detector than Canny operator. d Center B spline function can balance the smoothing and approximation of original data, and the fourth center B spline function is the only optimal solution of two order smoothing problem. e The error between the valve of time-frequency uncertainty of the fourth center B spline function and the lower bound of time-frequency uncertainty does not exceed 0.143% of the lower bound. f The derivative of center spline B function can construct a stability dyadic wavelet and can give a fast algorithm for multiscale edge detection, but Canny operator can do neither.

作者给出了Canny算子与中心B样条二进小波严格的比较证明，得出如下结论：a中心B样条函数具有紧支集，Canny算子不具有紧支集。b中心B样条函数的极限收敛于高斯函数，中心B样条函数的导数收敛于Canny算子。c四阶中心B样条函数的导数比Canny算子更接近最佳边缘检测滤波器。d中心B样条函数比高斯函数更能兼顾对原函数平滑和逼近的折中要求，并且四阶中心B样条函数是二阶逼近问题的唯一最优解。e四阶中心B样条函数的时频测不准关系值与时频测不准关系下界的逼近误差不超过0.143％。f中心B样条函数的导数可以构成稳定的二进小波，存在快速的多尺度算法；而Canny算子不构成稳定的二进小波，无法给出快速的多尺度算法。

Firstly, the multi-user detector that relatively integrity in theory and proximal to optimal multi-user detector is discussed and Decor elating Detector, Minimum Mean Square Error Detector, Optimal linear Detector together with the multi-capability indexes output energy, SNR, bit error rate, asymptotic efficiency, convergence etc.

本文首先对理论上及性能上接近最佳多用户检测的次最佳多用户检测进行理论研究，计算并分析了解相关检测器、最小均方误差检测器、最佳线性检测器的性能指标(输出能量、信噪比、渐近有效性、误码率以及收敛特性等)。

By investigating the convexity, monotonicity and asymptotic behaviour of the optimal value function, it is shown that the optimal policy is of simple hedging point structure and featured by several hedging points.

通过研究最优值函数的凸性、单调性和渐近性，证明了最优策略具有简单的阈值结构且被几个阈值参数完全刻画。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。