查询词典 optimal

The optimality of the derived recursive algorithm is described based on the duality between the theory of optimal estimation and optimal process.

通过最优估计与最优控制理论的对偶性，说明了递推算法的最优估计解的存在和唯一性。

The optimal pH of this enzyme was 6.8 and the optimal temperature was 45℃ in the ten-minute thermal preservation,but the time for the enzyme to lose 50% of its activities was 12 minutes in the thermal preservation at 50 ℃,3.75 minutes in the thermal preservation at 60℃,and 1.8 minutes in the therm...

该酶的最适pH为6.8，保温10 m in的最适温度为45℃，在50、60、70℃保温时，该酶活力丧失50%所需的时间分别为12、3.75和1.8 m in。

Associative memory ; Total storage abibity ; Optimal stability ; Optimal algorithm

联想记忆；全部存储；最优稳定性；优化学习算法

In chapter 4, we studythe cyclic edge connectedness of regular half vertex transitive graphs, we showthat a connected k(≥4)-regular half vertex transitive graph X with girthg≥6 isλ_c-optimal, and we also obtain a su?cient and necessary conditionfor a connected k(≥4)-regular half vertex transitive graph X with girth 4 tobeλ_c-optimal.

第四章，我们研究了正则半点传递图的圈边连通性问题，主要结果是证明了一个围长为g≥6的k(≥4)-正则连通半点传递图X是λ_c-最优的，并且得到了一个围长为g = 4的k(≥4)-正则连通半点传递图X是λ_c-最优的充分必要条件。

After canvassing the basic theories and methods of optimal design, the finite element structure statics analysis of bearing saddle and ANSYS optimal design of turnplate are analyzed respectively. It is propitious to raise efficiency ,improve capability and decrease cost and so on.

在研究了机械优化设计基本理论和方法之后，对主要零件进行了针对性的研究：齿轮轴轴承座结构有限元静力学分析、转盘的ANSYS优化设计。

A new cylinder type forage cutter with high operation was designed and manufactured. Construction design and its performance parameters, helical angle of moving knife, setting height of fixed knife, overload protective device, throwing device and edge shape of fixed knife were analyzed. The results of test were as follows: optimal helical angle of moving knife was 20°, optimal setting height of the center of the cylinder above fixed knife was 20 mm, line speed of blower vane was 13.6m/s ,power consump...

通过对 93ZT - 5 0 0型滚筒式铡草机的设计研究，分析了滑切角、定刀配置高度、定刀刃角对铡草机性能的影响，并对机构设计进行了探讨，试验结果为：动刀的螺旋角为 2 0°；滚筒中心高于定刀 2 0mm ；抛送风机叶片线速度 13.6m/s ；开刃定刀比矩形定刀的功率消耗低 17.5 %；安全防护装置采用牙嵌式安全离合器；研究结果对滚筒式铡草机的设计和应用具有一定的参考价值

The optimal or nearly optimal uniform approximation can be obtained for degree reduction of NURBS surfaces by using the method.

实现了NURBS曲面降阶的最佳或近似最佳一致逼近。

In this paper, a region approximation idea that means using a "fat curve" with a width to approximate the offset curve is proposed, and a complete set of algorithms to approximate offset curve using disk Bézier curve are given and implemented. In the algorithms, the optimal and uniform approximate curve of the offset curve as the central curve of the Disk Bézier curve is found by using Remez method, and then the upper optimal and uniform approximation principle is proposed to compute the error radius function of the Disk Bézier curve. Thus, the whole Disk Bézier curve can be obtained. In the end of this paper, the approximate effect of the Disk Bézier curve is not only analyzed and assessed, but also some specific examples are provided.

提出用一条带宽度的"胖曲线"来逼近上述等距曲线的区域逼近思想，并建立与实现了圆域Bézier曲线等距逼近的整套算法，包括应用Remez方法求出等距曲线的最佳一致逼近曲线作为圆域Bézier曲线的中心曲线，提出上控最佳一致逼近的原理求出圆域Bézier曲线的误差半径函数，以及确定整条圆域Bézier曲线，最后还对该圆域Bézier逼近的效果做了分析和考核，并给出了一些具体实例。

The flexible manufacturing systems considered in the paper consist of possible unreliable workstations, whose inputs may be random. We derive the optimal input and service feedback control policy by using the uniformization technique and stochastic dynamic programming. It is shown that the optimal policy is of bang-bang type. Numeric example is given to illustrate the results.

对于具有随机输入和随机需求的一类不可靠柔性制造系统，利用转移率一致化技术和随机动态规划方法，给出了输入率和服务率分配的最优反馈控制策略，指出系统的最优控制具有bang-bang形式的开关结构，数值例子验证了文中的结果。

The test conclusions indicates that the long-term equilibrium relationship between SZZS series and its optimal series is not significant, but the short-term dynamic relationship is comparatively significant; since 2007, the ratio of variance to its mean is more than 0.4, which implies that SZZS is deviated from its optimal level to a great extent, which is the basic feature of bull market or bear market, and this also verify the robustness of these conclusions.

实证结论表明，上证指数序列与其均值序列的长期均衡关系不显著，但短期的动态关系比较明显；从2007年开始，上海股市的标准差/均值相当大，超过了0.4，这意味着上证指数偏离其均值的程度较大，这是牛、熊市的基本特征，这也印证了本文结论的强健性。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。