查询词典 welted seam

Using a running stitch sew a seam along the bottom then repeat in the opposite direction to enforce the seam.

用针缝运行沿底部，然后向相反的方向重复执行缝缝。

SEAM: A seam is defined as a set of three consecutive pais of the Serials of the same kind.

顺子：是指三张相连属於同一花色的序数牌的组合。

In this paper, a seam tracking system based on photoelectric sensor which consisted of a photoelectric sensor, a sub-system of control and executive machine is studied. And a set of seam tracking software is developed using assembly language for MSC-51 microcomputer.

论文设计并研制了一套光电传感器式焊缝自动跟踪系统，该系统由光电传感器、控制系统和执行机构等组成，并根据系统的要求开发了基于MSC-51单片机的跟踪系统软件。

In this paper,a simulation program of hard parcels distributed in a coal seam is set up on the basis of analyses and assumptions,and four distributions of these parcels in a geven coal seam are analysed,which lay the theoretical foudation and necessory conditions of studying cutter random loads and designing dynamically working mechanism and entire machine.

文章通过分析假设，建立了硬质包裹体在煤层中分布的模拟程序，并模拟分析了硬质包裹体在煤层中的四种分布状况，为研究截割刀具的随机载荷、以及工作机构和整机的动态设计奠定了基础。

Because seismic boreholes were deployed in the middle of coal seam, the energy of dynamite would be distributed symmetrically on the face of coal seam.

其中高频区大约以2000 Hz为中心，低频域的中心频率约为490 Hz，并且高频域和低频域的能量差异不显著。

By analyzing the influential factors of outburst in coal roadway, an important conclusion has been reached that the outburst danger of coal roadway depends on the distribution of outburst indexes in coal seam ahead of working face, not on the tested value of one point in coal seam.

通过分析煤巷工作面的突出影响因素，得出了煤巷的突出危险性并非决定于煤体内某一点的值、而是决定于工作面前方煤体内突出危险值的分布状态的结论。

The actual distribution of unload zone of coal seam ahead of working face can be shown by continuously testing the initial gas flow from coal seam during hole drilling, which can be used to forecast the outburst danger of coal roadway.

连续测定钻进过程中的初始瓦斯流量可以反映工作面前方卸压带的实际分布，从而准确地预测煤巷的突出危险性。

Using RFPA2D-Flow stereo-gasses coupled system to simulate the process of gas draiange in lower air permeability coal seam by loose blasting,it interprets that loose blasting is a effective ways to increase air permeability in low air permeability coal seam .

运用RFPA2D-Flow固气耦合系统模拟了松动爆破抽放低透气性煤层内瓦斯的过程，解释了爆破松动是增加低透气性煤层透气性的有效途径，本文对松动爆破前后抽放过程中煤层内瓦斯压力和瓦斯渗流场的变化规律进行了数值模拟对比，为进一步理解瓦斯抽放、松动爆破增透机理等提供理论基础和科学依据。

In summary, various key experimental conditions in electron acoustic imaging of ferroelectric domains were systematically studied. The optimum experimental conditions to obtain EAI of domains with good quality and the factors important to image analysis have been presented. The piezoelectric vibrator model and calculation of motion equation are helpful for explaining the imaging mechanism and related experimental phenomena. The sample holder with variable electric field was designed. The domain movement of BaTiO〓 ceramics and crystal under lateral and longitudinal applied electric field and domain movement of PMN-PT crystal under longitudinal poling electric field were observed. The application of SEAM on revealing of ferroelastic domains, imaging of residual stress distribution in ceramics coatings and around the pores on the surface of ferroelectric ceramic composite have been reported respectively. All these works enriched the study of electron acoustic imaging and extended the application of SEAM in the characterization of materials.

综上所述，本文系统地研究了各项关键实验条件对电畴电声成像的影响，指出了获得最佳畴结构电声像的条件和成像分析中应当考虑的各种影响因素；提出了解释电畴电声成像的压电振子模型，在此基础上推导并求解了压电振子运动方程，并对一些实验现象作出了解释；成功地设计了可变电场的样品台，观察了BaTiO〓陶瓷和晶体在横向电场作用下的畴运动，PMN-PT晶体在纵向极化电场作用下的畴运动；探索了电声显微镜在铁弹畴成像，陶瓷涂层应力观察，陶瓷自然表面气孔周围应力成像的应用，这些研究，丰富了电声成像的学术内涵，拓展了电声显微镜的应用领域。

Numerical simulation results show that, after No.16 coal seam has been mined, the subsidence of the No. 15 coal seam does not reach 750 mm, half of its thickness. Except the area corresponding to the face end of the No. 16 long wall coalface, the No.

模拟结果表明，先采己16煤后，己15煤的倾斜值即其台阶下沉量比较小，未超过煤厚之半(750 mm)，除工作面两端头对应区域外，煤层表现的很连续。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。