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High detection sensitivity of 120 ppm can be achieved by using wave division mutiplexing technique, gas absorption cell with rectangular prism and digital match filter for the processing of weak signals which measurement accuracy of wavelength can be highly enhanced.

系统以ELED作为宽带入射光源，利用甲烷在光纤低损耗窗口波段的吸收特性，利用波分复用技术和直角棱镜吸收池，并采用提高波长检测精度的DMF对微弱信号进行处理，使得系统的灵敏度达到120 ppm。

The test with the gravity anomalies and gravity gradiometry data of the synthesized Y-type dyke and multiple rectangular prism models shows that the method can image the spatial extension states and the distribution of equivalent excess masses of anomalous geological bodies with high resolution both longitudinally and transversely.

通过合成Y型岩脉模型和合成多个直立长方体组合模型的重力异常和重力梯度数据试验分析，验证了本文三维相关成像方法可显示出异常地质体的空间赋存状态和等效剩余质量分布，具有良好的纵向和横向分辨率。

You can see rectangular texture piece and triangle face projection to texture coordinates space, set by vertices a, b and c.

你能看到给纹理坐标空间的矩形纹理和三角面投影，设为a、b、c顶点。

Respondents were asked to self report body shape as hourglass, rectangular, pear or inverted triangle.

应答者被邀请对自已报告身体形状作为滴漏，长方形，梨或被倒置的三角。

Generally, the use priority is given to rectangular groove, and triangle groove is used under ultra-high pressure and ultra-high vacuum.

一般情况下优先使用矩形槽，只有在特高压、特高真空的情况下才使用三角槽。

Head over to your PSD file and make a selection around the triangle using the Rectangular Marquee Tool.

使用矩形工具选中浮动箭头，copy并新建文件粘贴存为nav_hover.png。

During the simulation, surface current from primary electrode is computed. Taking rectangular triangle as the mesh unit, the integral formula of surface current can be simplified to a product of a difference expression and the surface area. So the computation complexity of FEM will be decreased and the time-cost will be cut down greatly.

在模拟过程中，需要计算主电极表面电流，通过选用直角三角形作为离散单元，将表面电流的二重积分表达式简化为一个差商表达式与主电极表面积的乘积，极大地降低了有限元分析的复杂度，减少了计算时间。

According to this method,four different 11-step algorithms with four different window functions which are rectangular window,triangle window,hanning window,and blackman window are designed. Analysis and simulation show that hanning window and blackman window with small lobes are less sensitive to errors. Seven different algorithms with the same phase shifting interval π/2 are designed by hanning window function,whose phase shifting steps are separately 5,11,15,39,51,76 and 101 steps.

选择矩形窗、三角窗、hanning窗和blackman窗生成4种11步移相算法，对振动误差和相移误差的分析验证了旁瓣小的hanning窗和blackman窗生成的算法对误差的灵敏度要小；再选择hanning窗生成了移相间距为π/2的5，11，15，39，51，76和101步7种移相算法，仿真验证了步数越多主瓣越小，对振动抑制能力越好，但需要更高的微位移器移动精度来获得有效的干涉条纹。

By using plug flow and trajectory model s, the inclusion-removal efficiency to the processof purifying liquid metal contained in triangle/rectangular pipe by travelling magnetic field are analyzedtheoretically.

采用活塞流及轨线模型，对行波磁场净化液态金属时，三角形及矩形管中夹杂物的去除效率进行了理论分析，找出了提高夹杂物去除效率的途径；对两种形状管的夹杂物去除效率进行了比较；确定了行波磁场能有效去除夹杂物的粒径范

TE mode diffraction characteristics of surface-relief grating having different symmetrical profiles (rectangular, sinusoidal, triangle, trapezoidal profile) are calculated with rigorous second order vector couple-wave theory, the law of diffraction efficiency as a function of grating groove depth are analyzed: in a specific condition, diffraction efficiency might be close to 100%.

本论文采用严格的二阶矢量耦合波理论计算了矩形、正弦、三角形、梯形等对称面形蚀刻光栅的TE模偏振的衍射特性，分析了光栅的衍射效率随着沟槽深度变化规律。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。