查询词典 combination frequency

Ect of VaRforecast combination, set up the relation between diversification e?ect of VaR fore-cast combination and diversification e?ect of forecast combination under square loss.

借助于蒙特卡罗模拟技术，发现了风险值组合预测分散化效应的特殊性，建立了其与平方损失函数下组合预测分散化效应的联系。

The meaning of the word in free combination fulfils in the combination while the combination makes it out.

自由搭配中词语的意义在搭配中实现，同时搭配使得所搭配的词实现意义。

In vitro time-killing studies, the combination of pei-amphotericin b and pei-fluconazole enhanced antifungal activity, but there was an antagonist for the combination of pei-polymyxin b.conclusionspei alone and in combination with amphotericin b and fluconazole displayed the high antifungal activity against candida albicans.

在体外致死研究实验中可以看到，pei-两性霉素b和pei-氟康唑结合物可以提高抑菌作用，但pei-多黏菌素b结合物却拮抗抑菌作用。结论 pei单独与联合使用均对白念珠菌产生很好的抗菌效果。

Using the innovative design method based on mechanism combination, taken four-wheeled, six-wheeled and eight-wheeled space-exploring robot as research object,we have got as many as sventy new kinds of isomorphic combination localmotion platforms and one hundred and sixty five new kinds of isomerous combination locomotion platforms.

以四轮、六轮和八轮空间探测机器人为研究对象，采用基于构形组合的空间探测机器人设计方法，得到70种新型同构组合空间探测机器人移动机构和165种新型异构组合空间探测机器人移动机构。

Thus,his concept of Sino-Western culture exhibitsmany characteristics of scientific theories,i.c.,(1) an organic combination of strong national self-esteem and a proper sense of pried with theconsciousness of opening to the outside world;(2)an organic combination of broad and extensiveabsorption and adoption with materialistic dialectics;(3) an organic combination of practicality withcreative spirit;(4) class character,purposefulnessand scientificity all merging into an organic whole.

因此，他的中西文化观具备了一种伟大的科学理论的诸多特征。即：强烈的民族自尊心和自豪感与开放意识的有机结合；广采博取的精神与唯物辩证法的有机结合；实践性与创新精神的有机结合；阶级性、目的性，科学性的一体化。

Through analyzing the heavy mineral combination and its distribution characters in Malang Area of Santanghu Basin, the source direction of deposits were judged in Malang Area by using the type of the mineral combination, its percentage content and curve of stability coefficient, in combination with the percentage distribution of quarts sandstones in each stratum.

通过对三塘湖盆地马朗地区重矿物组合及分布特征的分析，利用重矿物组合类型、百分含量及重矿物稳定系数的曲线特征，结合各层系的石英砂岩百分含量分布，判断了马朗地区的沉积物源方向。

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。

Atomic resolution is achieved by frequency shift image for rutile TiO_2 (001) surface of pentahedron quantum dot in vertical route, spherical cap quantum dot in superposition s1 route and combination quantum dot in combination route scanning along [110] direction.

得到非接触原子力显微镜在金红石TiO_2(001)面五面体、球缺和组合形状量子点表面沿[110]方向扫描的原子级分辨率频率位移图像。

In order to measure the optimum combination of exciting force and frequency of sand sample with different moisture content and degree of compaction, the machine of MTS fatigue test is used to simulate vibrating roller, the optimum combination measured can provide reference to study interacting of vibrating roller and aeolian sand.

用MTS疲劳试验机模拟振动压路机，测出不同含水量和压实度下的激振力和频率的最佳最合，为研究振动压路机和风积沙的相互作用提供参考依据。

Methods By using the theories of conservation of mass, of energy, Darcy's law and hydrokinetics, the mechanical model of oil layer fluid under the function of low frequency vibrated wave was studied. With the combination of indoor experiment and the numerical simulation, the effect of downhole low frequency vibration on oil viscosity, interfacial tension, capillary pressure, producing water cut and the rising velocity of it was studied quantitatively.

应用质量守恒定律、能量守恒定律、达西定律、流体动力学等基本原理研究了低频振动波作用下油层流体的数学模型，将室内实验和数值模拟技术相结合定量地研究了低频振动对原油私度、界面张力、毛管压力、产水率及产水率上升速度的影响。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。