查询词典 distribution function

This is the reason behind the "unbundling" of the industry with mandated "open access" to the transmission system, a separated generation function from distribution, and a marginal cost merit-order dispatch system for electricity.

这就是计划的开放式传输系统和产业相分离的原因，从配送中分离出来而产生的功能，并且是一个低成本高效有序的电力调度系统。

objective the aim of this study is to investigate the expression and the distribution of the nerve growth factor during the period of neural tube development of human embryo.method early development of neural tube was studied in human embryos about 35 gestational days by using immunocytochemical abc technique.result there were ngf immuno-positive substances in the cytoplasm and nuclei of neuroepithelial cells in the ventricular zones of neural tube.in the intermediate zone of neural tube,ngf immunoreactivity was detected in the nuclei of some neurons,or the processes of other neurons which contained no ngf-immunoreactive substances in their nuclei;the expression pattern of ngf in the marginal zone of neural tube was similar to that of the intermediate zone.the density of ngf-immunorecative particles was higher on the rostrum side of neural tube than on the caudal side.the ngf immuno-positive cells were also observed among the somites of embryo under the neural tube.conclusion these results suggest that ngf was an important signal molecule to induce neural tube differentiation,and that ngf may play a significant role in regulation of the biological function of neurons in developing neural tube.

目的 研究捷安肽素的抗真菌作用机理。方法采用形态学方法和同位素标记法。显微形态观察经捷安肽素处理后的供试真菌的形态学变化。进一步采用14c同位素标记的特异底物&尿苷二磷酸-（14c）-葡萄糖&示踪，研究捷安肽素对真菌(1，3)-β-d-葡聚糖合成酶活性反应的影响。结果研究神经生长因子在早期人胚神经管发育过程中的定位表达。方法采用免疫细胞化学 abc法染色，研究35天人胚的发育情况。结果在人胚神经管的室管带中，神经元的细胞质和细胞核ngf免疫反应阳性；在中间带，一部分神经元的细胞核ngf免疫反应阳性，另外一部分神经元的细胞核ngf免疫反应阴性，而其突起ngf免疫反应阳性；在边缘带ngf的表达与中间带相似。在神经管的头侧ngf阳性反应较强，神经管的尾侧ngf阳性反应较弱。结论 ngf在人胚神经管免疫反应阳性，表明ngf可能是诱导神经管分化发育的重要信号分子，提示ngf可能在人胚神经管的发育中具有十分重要的作用。神经生长因子；人胚；神经管；发育

In order to measure the temperature distribution of this loop, a new method based on the fact that dissolvability is a one-valued function of temperature was developed.

为了获得坩埚的温度分布，作者发展了一种利用溶解度是温度单值函数的规律来测量小尺寸坩埚温度分布的近似测温方法，测量了该坩埚的温度分布。

Finally, the thesis analyzes statistical laws of the maximum saltating height and saltating length of saltating sand grains and they follow Gamma function distribution. This is consistent with the results of water-sand motion. It shows that statistical laws of saltating height and saltating length of saltating sand grains are independent of the medium of flow. It is possible the nature of saltating sand grains.

最后，分析了沙粒跃移距离、跃移高度的相对量的统计规律，认为它们均服从Gamma函数分布，与在含沙水流中的研究结果一致，说明沙粒跃移运动的跃移高度与跃移距离的统计规律与流场、所处的介质无关，这可能是沙粒跃移运动的本质所在。

The aim of RITS design an d optimization is to achieve the system whole coordination and optimization by reasonable system function setting,optimistic distribution of business flow and optimistic mapping of system resources according to the requirement,thereby to provide the theory and method for the integration railway business inform ation system.

铁路智能运输系统设计与优化的目的就是对系统功能的合理配置、业务流程的优化布局以及系统资源的优化匹配，从而达到系统的整体协调和全局优化。

In a word, the mechanism can describethe NO conversion and the distribution of resultants as a function of temperatureand the component of exhaust gas.

模拟计算结果与实验结果非常吻合，该机理可以正确描述不同的气体组成和反应温度下，H_2选择性还原NO 的反应进程和还原产物分布。

The results show that the equilibrium stop-out price and trading quantity depend on the private types of quoters and trader,the trader s type distribution and the slope of quoting quantity versus price function.

结果表明：均衡时市场的截止价格和交易量与报价者和交易者双方的私人类型、报价者关于交易者的类型分布估计以及报价者的报价数量对价格的斜率有关。

However, for the collision processes in He target, a large discrepacy between the CTMC results and experimental measurement is found. As is well known, the microcanonical distributions of bounded electrons in CTMC method is quite different from quantal distributions, we modified the initial microcanonical distribution by using eleven different ionization thresholds of electron bounded in target. With modification, we calculated the collisional process of O~(3+) with He, and the total cross sections of all processess are calculated as a function of the incident energies. The agreement with experiments is improved by the modified distributions.

但由于靶电子的微正则分布与量子分布有很大不同，在计算离子与He靶碰撞时发现结果与实验差距很大，我们基于使用多个系统总能量U值，对初始电子的微正则分布进行了优化，使其更接近于量子力学的径向空间分布，然后计算了O~(3+)与氦原子随入射离子能量变化的各种反应过程截面，发现优化极大地提高了计算精度，特别是我们的模型对于描述单电子、双电子丢失过程非常成功。

The is related to the frequency dependent absorption cross section and the density and spatial distribution of atoms in the lower level of the transition. Position dependent 5P3/2 state densities had been combined with the collisional broadening rate 5P3/2 5S1/2 line due to both helium and cesium perturbers to yield the .The effective radiative rates of the Rb D2 line as a function of the He pressure PHe were obtained . The fluorescence intensity I780 of the 5P3/2 5S1/2 emission was measured simultaneously.

由于辐射陷获存在，有效辐射率是自然辐射率与透射因子（发射的光子在探测区域内没有被吸收的平均概率，它与吸收截面及激发态原子密度和空间分布有关）的乘积。5P3/2原子密度及其空间分布结合5P3/2 5S1/2跃迁线的碰撞增宽计算了透射因子，从而得到了不同He气压下，Rb D2线的有效辐射率。

This article overviews the distribution and function of NO during the human fetal brain development , combining with the previous research.

本文结合前人研究结论重点对NO在人胚胎脑发育中的分布及其作用的研究结果进行综述。

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。