本文推导了均匀和梯度介质中的等时线公式并计算了二维均匀和梯度介质中等时线的几何特征。
In this paper we derive the formulas for the isochrones in homogeneous and gradient media, and give some numerical resul.
指与缝合线、省线、褶线等相交的一条短线，以暗示缝线相连，作为线条对位时用的记号。
Refers to the suture line, the provincial line, fold line and so on the intersection of a short line, in order to imply that the suture is connected, as a mark of line alignment.
异常铅二次等时线是普通铅同位素地质学研究中非常重要的一个课题。
The study on secondary isochron of anomalous lead is a very important problem in the common lead isotope geology.
该算法首先利用结式法计算出两二次曲面相交时交线的投影方程，再对投影方程进行分解等处理。
The algorithm used the resultant method to computing the intersection's projection equation and deal with the projection equation through decomposition and so on.
在急性调整期，颅内的血肿在CT扫描上可能呈现等密度线，尤其是合并凝血病时。
In the acute setting, an intracranial haematoma can appear isodense on CT scanning, especially if a coagulopathy is present.
在订购对焊连接阀门时，要指定管道连接端口的管壁厚度，并且提供有关类型、型号和焊接端等高线等参数。
When ordering Butt Welding End valves, specify schedule of pipe end and give complete data concerning style, figure number and contour of weld end.
本文介绍的方法，对时间场法求取等时线方法进行了改进。
The method introduced in this paper improves the contour way which is gained from time field.
时间地图是利用时间作为量算单位，根据城市外缘各点与城市中心的时间距离长短差异描绘出的等时线地图。
According to the difference of the temporal distance between the surroundings and the city centre, an isochronal temporal map can be drawn, where time is taken as a measuring unit.
在利用等熵线计算冲击温度时，从冲击绝热线出发推导了一个半解析的等熵方程。
In the calculation of shock temperature by using isentropic curve, an isentropic equation which is consistent with the Hugoniot curve is developed.
相同时间或年代的点的连线，比如地震剖面中的反射和等时线图中的等值线等。
A line joining points of equal time or age, such as a reflection in a seismic profile or contours in an isochron map.
提出了基于GIS等时线分析方法的理论模型，以城市公共交通运输系统的主要工具——公共汽车和城市火车为例，描述了等时线分析的设计原型。
Through the analysis of the urban public transportation system, a new theoretical model based on GIS isochrone approach is put forward and a design prototype is described with an isochrone analysis.
文章首次对采自矿床不同类型矿石中的辉钼矿进行了铼-锇同位素定年，获得等时线年龄为（168。
This study provides a high-precision Re-Os isotopic dating for ten molybdenite separated from the different ore types with an isochron age of (168.
时间结构的表达则从时间结构的形态方面总结出等时线、等时圈、时间廓线图和网络图等表达形式；
Thirdly, summarize four expressing forms of urban time structure of which isotime curve, isotime circle, time contour and time network.
你十七岁时，她在等一个重要电话。你对她的报答是：整夜占着电话线。
When you were 17 years old, she was expecting an important call. you thanked her by being on the phone all night.
当绘画唤起人类的审美情感时，作用于人们的是一种绘画所独有的语言形式，它包括点、线、形、光、色等构成要素。
When the painting arouses the mankind's aesthetic emotion, what act on the mankind is a language form including point, line, form, light, color and other inscapes.
利用快速四阶循环累积量算法、时频脊线分析与小波变换相结合的方法，实现了跳频频率和码速率等参数的高精度估计。
They are used to yield accurate estimation for the hop frequencies and hop rate, which are fast 4th-order cyclic cumulants algorithm, time-frequency backbone curve analysis, and wavelet transform.
在使用PLC对各种制造装备、自动化生产线等进行控制时，必须对各类故障做出实时正确的反应；
The use of PLC for various manufacturing equipment, automated production lines, and control must be made on all kinds of real-time fault right response;
因此，在浓度较大时，采用线性吸附等温模线会得到偏不安全的结果。该解相对较简单，并可用于验证各种数值模型，拟合试验数据等。
The present method was relatively simple to apply and could be used for evaluating experimental results and verifying more complex numerical models.
因此，在浓度较大时，采用线性吸附等温模线会得到偏不安全的结果。该解相对较简单，并可用于验证各种数值模型，拟合试验数据等。
The present method was relatively simple to apply and could be used for evaluating experimental results and verifying more complex numerical models.
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