不偏

At present, there are some instances in oilfield distribution networks, such as the improper selection of transformer capacity, the current density being overhigh, which overload the reactive power, reduce the power factor, increase the network loss, and decline the voltage quality, consequently the capacity of the networks cant be sufficiently exploited.

目前油田配电网普遍存在变压器容量选择不当、某些线路的电流密度过大等情况，导致配电网传输无功负荷过大、运行功率因数偏低、网损增加、电压质量下降、电网容量不能得以充分开发。

First of all materials must be quasi-open, with special attention to Cutter Paper knife from top to bottom side may have errors, so one must not cut too much.

首先开料一定要准，特别要注意切纸机切纸上下偏刀可能会有误差，因此一定不能一次切太多。

For some parametric estimation, whether it is the best estimation or not, its consistency, unbiasedness, effectiveness, invariance, and so on are often discussed. Then, it is compared with the data we get from experiment, and the deviation with the experimental data is considered.

某一参数估计是否是"最优"估计，通常要从一致性、无偏性、有效性、不变性等方面进行讨论，进而通过实际的观察对其进行数据拟合，分析其相对于实际模型的偏差程度。

Result The overall results of pararosaniline hydrochloride were larger than that of advanced constants distillation trace titration but the difference was slight. The SO2 residues of three kind of Konjac powder were Yunnan Jianjing white konjac 2.35 g/kg; Sichuan Yibin white konjac 2.21 g/kg; Sichuan Yibin flower konjac 1.93 g/kg.

结果］盐酸副玫瑰苯胺法测定的整体结果比常量蒸馏微量滴定法的结果偏大，但差异不显著；测得3种魔芋精粉的SO2残留量分别为云南健晶白芋2.35 g/kg；四川宜宾白芋2.21 g/kg；四川宜宾花芋1.93 g/kg。

While partial correlation between them was not significant.

偏相关不显著。

The partial derivative of f with respect to x keeping r and z fixed.

函数f对x的偏微分，r和z保持不变。

Based on the assumptions of semi logarithmic relationship between coefficient of permeability and void ratio as well as the relationship between effective stress and void ratio of soil, the method of Lie Group Transformation is applied to solve the non linear partial differential equation of large strain consolidation of homogeneous saturated clay in semi infinite domain.

基于有效应力与孔隙比以及渗透参数与孔隙比之间的关系的一些假定，采用李群变换求解考虑材料非线性和几何非线性的半无限均质土体大变形固结非线性偏微分方程，得到了一个不考虑自重固结的完全解析解。

The DC reactive power is the only parameter to be specified in calculation, and the partial differential formulas in Jacobian matrix do not change when the DC control model changes.

计算时，只需规定换流器直流侧的无功功率，而且当直流系统控制方式发生变化后不需重新推导Jacobian矩阵中的偏导公式。

Without the partial ordering relation and ordering structure, a conversant algebra system Boolean algebra is analyzed with a new point of view in this paper, which makes most concepts in discrete mathematical being understood more deeply.

在不涉及偏序关系和序结构的前提下，用一种新的观点剖析了一个熟悉的代数系统———布尔代数，加深了离散数学中代数系统的有关概念的理解和认识。

One important characteristic of standing wave is that its phase keeps constant in different points of the network.

驻波的一个重要的特点就是相位不因位置的变化而变化，这个特性可以减少信号偏斜。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。