Except for keyword - in - context index, there is no breakthrough made in automatic derived indexing today due to low precision ratio of retrieval.
自动抽词标引除编制题内关键词索引外，至今没有突破性进展，主要是检准率太低。
A functional index transforms the data in a column and stores the derived values in sorted order.
函数索引对列中的数据进行转换并按照顺序保存转换后的值。
It might contain metrics for trip duration, pick-up and drop-off delays, a customer satisfaction index derived from these, average driving speed, and so on.
一次旅行的MC可能包含旅行持续时间、上车和下车延迟、从这些度量得出的客户满意度指数、平均行车速度等度量。
But inflation expectations, derived from the gap between yields on index-linked and conventional bonds, hardly suggest fears of a Zimbabwe-style debasement.
但是，由指数连动债券与一般债券的息差产生的通胀预期，不会引起津巴布韦式货币贬值的恐慌。
An index can be created on a single column, on derived values of a single column, or on a combination of columns and derived values of columns.
可针对单个列、单个列的派生值、多个列和多个列的派生值创建索引。
The server's availability index is derived from the ratio between the current response time and the response time in optimum conditions (with no Domino transactions).
服务器的可用性指数是指当前响应时间和最佳响应时间（没有Domino事务）的比率。
Chain index an index number derived by relating the value at any given period to the value in the previous period rather than to a fixed base.
环比指数指通过把某一时期的数值与前一时期的数值相比，而不是与固定基期相比而得出的指数。
The concept of the structural performance safety index is put forward and its calculation method is derived based on the structural deformation limit state equation.
提出了结构性能安全指数的概念，并以结构的变形极限状态方程为基础得到了结构设计性能安全指数的计算方法和结构性能等级的划分标准。
Cases are triggered by the index which is gotten from knowledge represented by decision trees and diagnostic conclusions derived from the two approaches are output by synthesize.
用决策树知识作为有关案例知识的索引对案例进行触发，对二者得到的诊断结论进行综合后输出。
While one trader said that current physical deals were aligned with paper values, another pointed out that the API2 index, against which coal swaps are settled, is derived from spot physical trades.
一个交易商指出，目前的现货交易和票据市场的价值保持一致，另一个则指出作为煤炭掉期交易的标准的API2指数是从现货实际交易中产生。
The imitation function of heat index used in engineering applications is derived and applied to the short term electric load forecasting.
推导出热指数在工程应用中的拟合函数，并应用于电力负荷短期预测工作中。
The articulation index of putonghua (standard colloquial Chinese) is derived with a new method.
采用一种新的方法导出了汉语普通话的清晰度指数。
In the present paper, the general representations for the solution are firstly derived for orthotropic elastic dynamic problems of arbitrary index of Self similarity.
首先对具有任意自相似指数的正交异性弹性动力学问题推导了解的一般表示，给出了一般解法，然后用这一方法对若干具体问题进行求解。
Based on meshing theory, a formula is derived for calculating index error of worm-type CAM follower (i. e. Tindex plate) under influence of actual worm-type CAM profile and dimensions.
以啮合理论为基础，导出了蜗式凸轮机构从动件(即分度转盘)在凸轮实际轮廓和实际机构尺寸诸因素的影响下，分度误差的计算公式。
Under the same amplitude modulation index and same frequency modulation index, different SVM waveforms can be derived from different sampling point distributions.
相同频率调制比和幅度调制比的情况下，对调制波信号的不同采样点分布可以得到不同的SVM波形。
In this paper calculation formulas of differential change gear raito and index change gear raito for Oerlikon and Klingelnerg bevel gear generating machines are derived.
导出奥利康和克林根贝尔格锥齿轮铣齿机差速挂轮比和分齿挂轮比计算通式；
The analytic formulas of propagation constants of axisymmetric modes in a Kerr law nonlinear graded index optical fiber are derived.
导出了克尔非线性梯度折射率光纤轴对称模传播常数的解析公式。
Starting with waveguide ray theory, the condition for single-mode waveguide is derived, and design of single-mode strip waveguide is accomplished with effective index method.
从导波的射线理论出发，导出了波导单模条件，运用有效折射率法完成了单模波导的优化设计。
The Gaussian index profile of a diffused optical waveguide is approximated by an appropriate polynomial, and the asymptotic solutions of the mode efficient index is derived in a analytical form.
本文用适当的多项式函数近似扩散光波导的高斯折射率分布函数，推导了导模有效折射率的解析形式渐近解。
An expression of the vertical ride comfort index of rail vehicles was derived by modal coordinate transform and described by modal parameters.
用模态坐标变换法推导了用模态参数描述的车辆垂向平稳性指标计算表达式。
In this paper, stock index futures theory prices is derived from Cost-of-carrying model gives rise to the concept of index futures mispricing.
本文从持有成本模型推导出的股指期货理论价格出发，引申出指数期货错误定价的概念。
Relationships between sulfide capacity or sulfide capacity index and sulfur partition ratio and between phosphate capacity or phosphate capacity index and phosphorus partition ratio were derived.
推导了炉渣硫化物容量(或容量指数)与硫分配比及磷酸盐容量(或容量指数)与磷分配比的关系。
The parameters derived from the non liner test were index of Poincare graphics (PLO), complexity (com), prediction (pre), index of Lyapounov (li), and correlation dimension (CD).
非线性检测包括构成散点图、计算散点图量化指标(PLO)以及复杂度(COM)、预测度(PRE)、李雅普·诺夫指数(LI)、相关维(cd)等参数。
The transformation formulae of Gaussian beams through a nonlinear parabolic graded index rod lens are derived.
本文导出了高斯光束通过非线性抛物形梯度折射率棒透镜的变换公式。
The mode equations of the planar waveguides with exponential index profiles are derived by using WKB method.
文应用WKB法导出了指数折射率平面光波导的模方程。
In this paper, based on optical principle, a formula of measuring the refractive index of fluid has been derived.
根据光学原理，推导出测量液体折射率公式。
Single form site index table was constructed after derived curve was expanded by differential method.
用差分法展开导向曲线，编制了单形立地指数表。
The graded-index optical waveguide mode equation is strictly derived. We get an analytical equation and provide a method of numerical calculation.
本文对渐变型波导的模方程，进行严格的推导，得到解析表达式，从而给出了数值求解的方法。
Upper envelope model is derived from the characteristics of our price index. This paper is of extensive practical value.
并根据我国物价指数变化的特点，进一步建立了上包络线模型．使本文更具实际意义。
Dodder derived from two measured average growth index terms that paraquat 100 times and 200 times, has the best inhibitory effect.
由两次测量得出的菟丝子生长指标平均值来看，百草枯100倍、200倍溶液，具有最佳的抑制效果。
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