不偏

We discuss asymptotically best linear unbiased estimators of the Logistic population based on selected order statistics and give the formula of computing the ABLUE, the variance and the covariance of the ABLUE in limit, and properties of the ABLUE, and so on. We give the optimum chosen of spacing which is the ABLUE with maximum asymptotic relative efficiency based on complete sample when selected order statistics number is less than 10, and obtain its maximum asymptotic relative efficiency.

讨论基于Logistic总体Ⅱ型截尾样本的若干个样本分位数的总体分布参数的近似最佳线性无偏估计；给出了该近似最佳线性无偏估计的计算公式，估计方差与协方差的极限表达式及估计量的大样本性质等；给出了全样本，样本分位点个数固定，但不超过10情形下，使上述近似最佳线性无偏估计有最大相对联合估计效率时，样本分位数选取法及最大相对联合估计效率；为大样本情形下，该近似最佳线性无偏估计的应用提供了理论依据。

From two-dimensional contour map,continuous "band" segregation of sulfur and non-continuous "band" segregation of phosphorus in center of cross section were o...

从大梁钢坯横截面整体的原位统计分布二维成分等高图可以直观的看出，在连铸坯横截面上中心部位，硫形成一条较连续的"带状"偏析，磷形成一条不连续的"带状"偏析，其它元素中心"带状"偏析不明显。

A general form of D-FOG has been proposed in order to lower the bias drift and several forms of that have been studied:(1) The Blake type in which a depolarizer is inserted between the polarizer and coil-coupler of D-FOG can suppress the intensity error but not change the magnitude order of the amplitude error.(2) The type with two Lyot depolarizers added in the ends of sensing coil can suppress efficiently the both errors.

为了减小D-FOG漂移，作者提出去偏陀螺的一般形式，并分析其中几种重要形式：（1）在偏振器与环分束器之间插入Lyot去偏器的Blake形式，可以有效地降低强度误差但不改变振幅误差的量级；（2）在传感环两端各插入一个去偏器可以有效地抑制这两种误差。

In the end, there is a brief conclusion . The conclusion of this passage mainly includes: The listed companies have obvious preference for stock right financing, and the financing order is stock right financing, the short-term debt, endogenous financing, the long-term debt, which differs from that of western countries; Financing structure is characterized by comparatively lower asset-liability rate, higher floating debt and lower long-term debt; The governance structure is irrational, and the shareholders" meeting perform practically no function. In the meanwhile, board of director structure is unreasonable, which is highly coincident with the manager layer. Board of supervisors" independent character is poor, while manager layer is lacking in restraints and supervision; The interdynamic

本文的结论：上市公司有明显的股权融资偏好，融资顺序为股权融资、短期负债、内源融资、长期负债，这与西方国家上市公司的融资顺序不同；融资结构具有资产负债率相对较低，流动负债偏高、长期负债偏低的特征；治理结构不合理，股东大会形同虚设、董事会结构不合理、董事会与经理层高度重合、监事会独立性不强、经理层缺乏约束与监督；治理结构与融资策略选择的互动关系不强；独立董事比例与资产负债率正相关，工业、公用事业与资产负债率负相关，商业与流动负债率正相关，第一大股东持股比例与流动负债率负相关，第一大股东持股比例与长期负债率正相关，执行董事比例、工业、商业与长期负债率负相关。

The results show that under the condition of the experiments, the high KOH concentration is benefit to the formation of soluble niobate, but the high temperature is favor of the formation of insoluble niobate, and the insoluble tantalate is the sole leachin...

而KOH浓度一定，温度升高，有利于生成偏铌酸钾。浸出时间过长也将促使不溶性偏铌酸钾的形成。试验条件下，Ta2 O5在KOH高浓介质体系中只得到不溶性的偏钽酸钾。Nb2 O5和Ta2 O5混合物的浸出规律与纯Nb2 O5类似，铌、钽不能被选择性地浸出。

The adjusted R-square is still not an unbiased estimator of the population R-squared, because the ratio of two unbiased estimators is not an unbiased estimator.

调整过的R2仍不是总体R2的一个无偏估计量，因为两个无偏估计量的比例不是一个无偏估计量。

The composition of TB6 alloy ingots after heat treatment then water colling and air colling was analyzed. The results show that the segregation in the grain boundary is more serious than the segregation in the grain both in air cooled ingot and quenching ingot, the composition in grain boundary are not uniform; the segregation of Fe is more serious than the segregation of Al and V; the composition in air cooled ingot and quenching ingot are more uniform than the composition in cast; the segregation in quenching ingot is lowest, quenching can reduce the segregation.

中文摘要：对热处理之后进行水冷与空冷的TB6合金铸锭进行了成分分析，对两种热处理所得结果进行分析，发现无论铸态还是空冷与水冷之后的试样，晶界偏析总比晶内严重，而且晶界处的成分分布很不均匀；Fe元素的偏析要比Al元素与V元素的偏析严重；空冷与水冷后的试样，各个元素分布较原始态的更加均匀，各测试点之间的差距减小；水冷之后的试样成分分布更理想，比空冷的效果好，水冷可以显著改善TB6合金铸锭偏析现象。

With a comprehensive study on the development of ellipsometer both at home and abroad as well as an analysis of the problems undermining HST-1 ellipsometer such as low effeciency in measuring, poor precision and ISA, this paper applies the master-sercice framework with USB interface into the designing of a precise reflectional null ellipsometer according to the principles by which the null ellipsometer works.

摘要本文综述了椭偏仪的国内外发展状况，分析了原来HST-1型椭偏仪存在的问题，如测量速度慢、精度不高和ISA接口等，根据消光式椭偏测量原理，采用了USB接口的主从机系统框架，设计了一台高精度反射式消光法椭圆偏振测厚仪样机，并对该仪器进行了大量的测试，测试数据表明该仪器测量精确度高且速度快。

The results show that Sb addition can diminish the crystal grain, but the content of segregative phase at crystal boundary increases, and the current efficiency of material is low. Compared with Sb addition, Sn addition can also diminish the crystal grain, the current efficiency increases, the content of segregative phase at crystal boundary reduces, but diffusional corrosion of the anode surface is not uniform. The cooperation of Sb and Sn can prevent Si from segregating effectively and enhance the current efficiency obviously. At the same time, anode materials have preferable surface dissolution characteristics.

结果表明： Sb具有细化晶粒的作用，但晶界存在较多偏析相，电流效率偏低；与Sb相比较， Sn也具有细化晶粒的作用，电流效率有所提高，晶界偏析相较少，但阳极的表面腐蚀溶解不均匀； Sn和Sb的协同作用在于能有效地抑制Si的偏析，显著提高阳极的电流效率，使得阳极表面具有良好的腐蚀溶解性。

Then, making use of the concept of eigenstate of polarization , the Jone's matrices of the coupler and the fiber are discussed in order to study the polarization state of the light in the resonator ring. The situation can be distributed into three kinds, two ESOPs are orthogonal, not orthogonal and only one ESOP exits, and each coincides to the special quality of the components in the ring.

其次借助偏振特征状态概念对偏振环中的光束偏振状态进行研究，从耦合器和光纤的琼斯矩阵着手，推导出表达偏振特性的公式，再将偏振情况分为三类，分别是两ESOP正交、不正交和只有一个ESOP，每一种情况都与组成光纤环的元件实际的性能相符。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。