查询词典 distribution function

Tobacco tomato spotted wilt disease was found in many provinces.This disease is widely distributed in Yunnan production tobacco area and it causes above 60% losses in some area. The tomato spotted wilt disease is one of the most potentially dangerous disease of tabacco in the world. This paper reviewed the distribution,symptomology, causal agents, pathogenic mechanism, the composition and function of virus genome and epidemiology and management of the tobacco tomato spotted wilt disease.

目前该病在中国许多省均有发生的报道，在云南烟区广泛分布，在局部地区可造成60%以上的严重损失，烟草番茄斑萎病被认为是世界上对烟草最具潜在危险病害之一，较为系统全面的综述了烟草番茄斑萎病的发生与分布，病害症状学，病原物，致病机制，病毒基因组结构和功能以及病害的流行及控制等方面的研究进展。

This series of instruments for low-voltage, medium voltage, high-voltage switchgear and distribution systems, central station monitoring system, generator set systems, building automation systems, energy management system, such as factories, able to measure three-phase three-wire, three-phase four-wire system current, voltage, active power, reactive power, apparent power, active power, reactive power, power factor, frequency, voltage triangular openings, the largest open-shaped voltage power parameters, at the same time with a remote, remote control function.

该系列 仪表适用于低压、中压、高压开关和配电系统、中心电站监测系统、发电机组系统、楼宇自控系统、工厂能量管理系统等，能够测三相三线，三相四线系统的电流、电压、有功功率、无功功率、视在功率、有功电能、无功电能、功率因数、频率、开口三角形电压、最大开口形电压等电力参数，同时带有遥信、遥控功能。

But because of its big slenderness ratio, smaller rigidity and damping, it is easy to cause a larger vibration in the windload and iceload function and so on, mast structure destruction accidents frequently occurred, has caused engineering and academic circles\\\s concern, this article summarizes the main structure damage diagnosis methods, carrys on preliminary dynamic analysis and the time-frequency distribution analysis with the vibration signal to the mast structure, and proposes the signal processing method is a appropriate method on the diagnosis to the mast damage.

但是，由于桅杆结构长细比很大，刚度、阻尼较小，在风荷载、裹冰荷载等作用下容易产生较大幅度的振动，桅杆结构的破坏事故时有发生，引起了工程界和学术界的重视，本文总结了几种主要的结构损伤诊断方法，并对桅杆结构进行了动力分析和振动信号时频分析，并提出信号处理的时频方法对桅杆损伤进行诊断比较合适的。

It is shown that there are plenty of ultramicropores (width less than 0.7 nm) in the ACF, which make ACF having the function of molecular sieve, and the pore size distribution of ACF becomes wider with increasing surface area.

研究表明ACFs含有大量的小于0.7 nm的极微孔，这些极微孔对吸附等温线的贡献较大，并且在吸附过程中赋予ACFs分子筛特性。

Cut off cut-off valve is mainly used for fluid pathway, including the cut-off valves, gate valves, plug valves, ball valves, butterfly valves, diaphragm valves, control API Cast Steel Valves valves and other folders; The main control valve for regulating fluid pressure, flow, etc., including control valve, throttle, valve and float valve, etc.; Check valve used to prevent reverse flow of fluid; Shunt valve fluid channel for distribution of destination, or two-phase separated, including slide valves, multi-valve, trap, and emptying valves and so on; Safety valve is mainly used for security, to prevent the boiler, pressure vessel or pipeline overpressure due to the damage; Multi-valve is a valve with more than one function, such as the cut-off valve can both start and end back from the role of the role of drying.

截断阀主要用于截断流体通路，包括眼镜阀截止阀、闸阀、旋塞阀、球阀、蝶阀、隔膜阀、夹管阀等；调节阀主要用于调节流体的压力、流量等，包括调节阀、节流阀、减压阀和浮球调节阀等；止回阀用于阻止流体的逆向流动；分流阀用于分配流体的通路去向，或将氧气专用阀、铜阀门两相流体分离，包括滑阀、多通阀、疏水阀和排空气阀等；安全阀主要用于安全保护，防止锅炉、压力容器或管道因超压而破坏；多用阀是具有一种以上功能的阀门，如截止止回阀既能起断流作用又能起止回作用。

Generally a very good agreement was observed between experimental and simulated results , not only in terms of source spectra and overall sound levels, but also in terms of the noise source distribution in the rotor plane as a function of frequency and observer position.

一份非常利益协定通常被观察了在实验性和被模仿的结果之间，不仅根据来源光谱和整体声音强度，而且根据噪声源发行在电动子飞机作为频率和观察员位置功能。

The availability of detailed acoustic array measurements on the same turbines provides a unique possibility to assess the predictions not only in terms of source spectra and overall sound levels, but also in terms of the noise source distribution in the rotor plane as a function of frequency and observer position.

详细的音响列阵测量的可及性在同样涡轮提供一种独特的可能性估计预言不仅根据来源光谱和整体声音强度，而且根据噪声源发行在电动子飞机作为频率和观察员位置功能。

Under the precondition of assuming the stock price did not following the famous geometric Brown law, and agents have no exact knowledge of the probability distribution for the uncertain economic shock and return rate perturbation, chapter five presents the uncertain dynamic models of portfolio choice and option hedging respectively. In this chapter, we define the H〓 norm of transfer function from disturbance input to control output as financial risk measurement, and investigate the risk-attenuating robust H〓 portfolio investment and option hedging strategies.

第五章在金融证券价格并非服从几何布朗运动，收益率波动和外部噪声扰动的统计特性未知的情况下，分别建立了金融经济领域证券组合投资及期权套期保值问题的动态模型，引入从扰动输入到评价输出传递函数的H〓范数作为金融风险的度量指标，运用鲁棒H〓控制技术，研究了抑制金融风险的动态证券投资和期权套期保值决策问题。

By studying comprehensively the distribution, formal characteristics and function of the diminutive of YBTH, the dissertation shows the basic features of the diminutive of YBTH and analyses objectively internal relations and development skeleton of the three kinds of diminutives in YBTH.

本文拟对这三种不同形式小称的分布、形式特点及其功能作较为详细的描写，以展示粤北土话小称的基本面貌，并在这一基础上对粤北土话三种小称形式的内在联系及其发展脉络作客观的分析。

We also study the Husimi distribution of the excited squeezed vacuum state.The theoretical calculation of Husimi function can help experimentalists to judge the quality of the experiment. We solve the problem of the density matrix for two interacting particles with kinetic coupling by using the bipartite entangled state representation.

作为纠缠Husimi算符理论的应用，我们计算并作图研究了单双模组合压缩态的Wigner函数和Husimi函数及其特性；计算并作图研究了激发压缩真空态的Husimi函数及其特性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。