查询词典 optimal

The key to feature extraction is to select the optimal feature combination from all the features. In this study, the optimal color feature combination,{/G,(R+4G+B)/6, H variance, S variance}, is selected using genetic neural network at first. Then the main texture features including the mean, variance, energy and entropy of the cooccurrence matrix, the secondary texture features including the maximum frequency number, absolute uniform, inertia and importance of the co-occurrence matrix are extracted.

在此基础上，提出适合多阈值和小目标图像分割的免疫遗传图像分割方法，该方法借鉴了生物免疫系统自调节、抗原识别和记忆功能，并结合了遗传算法对图像进行自适应区域的阈值分割，改善了遗传算法优化复杂问题时存在收敛速度慢和易陷于局部最优的不足，克服了传统阈值分割方法对目标大小的限制，是一种新型的有效的图像分割方法。

Based on the optimal data partitioning algorithm, only the accumulated error from the past frames is taken into account, and the complexity and performance of the causal optimal data partitioning algorithm are studied.

在最优数据划分算法的基础上，仅考虑过去帧的积累误差，不考虑误差对将来帧的影响，探讨了因果最优数据划分算法的复杂度及性能。

It involved the following aspects: choosing the optimal acidulous reagent, determining the optimal parameters of extracting technology of pectin , attempting the experiment of pectin de-coloration and purification.

盐析的最佳工艺为：温度控制在80℃，混合盐比为2：1，沉析时间为1.5h，沉析时pH值为3.8。用混合盐析得到果胶，产品得率7.6％，颜色灰白色，符合食品卫生要求。

The results showed that the optimal conditions were as follows: H3PW12O40/Al2O3 exhibited high activity and selectivity at the optimal temperature 330℃ and the load content of heteropoly acid 40%, the glycerol conversion reached 100% with acrolein selectivity of 83.7%.

结果表明，由甘油制备丙烯醛的较优条件为：当催化剂为H3PW12O40/Al2O3，负载量为40%，反应温度为330℃时，丙烯醛的选择性可达83.7％，甘油的转化率为100％。

The third chapter enunciates, from the angle of optimal adaptability, the close relationship between metaphor generation and addressor\'s pursuit of optimal adaptation in language choices, and thereby explains "why do people use metaphor so frequently".

第三章从最佳适应的角度，阐明了隐喻生成与发话人追求语言选择的最佳适应之间的密切关联，从而解释了"人们为什么要如此频繁地使用隐喻"。

The optimal control law obtained is composed of feedforward and feedback optimal terms without time-delay in analytic forms and a compensation term with time-delay in a sequence limit form of adjoint vectors.

得到的最优控制律由解析的无时滞前馈－反馈控制部分和伴随向量序列极限形式的时滞补偿控制部分组成。

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。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。