Numerical analysis of the instability of excavation face in shield construction

Analysis of Research Methods for Face Stability at Shield Tunneling

隧道盾构法施工开挖面稳定性研究方法评析

Wear loose-fitting leather gloves, face shield, safety glasses, and long-sleeved shirt or jacket when connecting, disconnecting, or opening cylinders, or whenever the possibility for exposure exists.

当连接、断开或开启钢瓶时，或者在任何存在暴露的可能性的时候，要穿戴宽松的皮手套、面罩、安全眼镜和长袖衬衣或夹克。

The influence of face shield involves its connection with soil nailing and its stiffness on soil nailing wall;

面层主要通过面层与土钉的连接和面层的本身刚度两个方面对土钉内力和墙体变形产生影响；

A study on the limit support pressure at excavation face of shield tunneling

盾构法隧道开挖面极限支护压力研究

The face shield of life jacket can be matched with a plurality of existing face bare type survival suit.

救生服面罩可以与现有的各种面部裸露式救生服配套使用。

Loading Method of Test for Double-circular Face Shield-Tunnel Lining

双圆盾构法隧道衬砌1∶1结构试验加载方法研究

The aim of the utility model is to make the installation structure of a driver's seat simplified and increase the switching operability of a front face shield.

本实用新型的目的是使驾驶座的安装构造简单化，提高前面罩的开闭操作性。

Ways to Improve Unit Productivity in Working Face with Flexible Shield Support

提高柔性掩护支架采煤面单产的途径

The technician who worked with the samples wore gloves and a gown, but no face shield, and may have been exposed.

经手这些样本的那名技术人员戴了手套，穿了大褂，但没有戴面罩，因此可能接触到了病毒。

Study on the Face Stability of Shield Tunnel with Large Diameter

大直径盾构正面稳定性研究

The connection between face shield and soil nailing determines the distribution of the axial force along length;

土钉和面层的连接方式决定着土钉长度方向上的轴力分布形态；

Safety and high efficient coal mining technology for coal mining face with shield supports

掩护支架工作面安全高效开采技术

The experiment has adopted INV303/ 306 fictitious instrument system and DASP mode analysis software, knowing the modal damping, modal rigidity, mode quality of the system. Have set up the vibration mechanics model in the tomato transportation of seven freedom degrees.

实验采用了INV303／306虚拟仪器系统和DASP模态分析软件，辩识系统的模态阻尼，模态刚度，模态质量等参数，建立了七自由度的番茄运输中的振动力学模型。

With analysis of professional software DASP, natural vibration frequency ( period)、 vibration mode and damping ratio of model structure with not sealing top and sealing top are obtained, and then analyze the the change rule of the dynamic characteristics after the two tests. 3.

利用专业软件DASP分析试验结果，得到模型结构在未封顶、封顶两种情况下的自振频率（周期）、振型和阻尼比，进而分析出两次试验后动力特性的变化规律。

Testing for buffer characteristics of the prototype of lunar lander with three legs are finished by means of piezoelectricity acceleration transducers and the DASP software which may collect and analyze data.

采用压电式加速度传感器及DASP数据采集与分析软件对三支撑月球着陆器原理样机缓冲性能进行了试验测试。

Moreover, the natural frequencies and modes information of the bare frame and the infilled frame were obtained by the analysis of the Dasp software.

通过dasp软件的分析功能，获取了空框架和填充墙框架的固有频率和相应的振型等模态信息。

The researches indicate that applying DASP technology in test instrument platform can extract high frequency signals with lower sampling rate effectively, and improve test precision and efficiency.

研究表明DASP技术融入测试平台能以较低的采样率有效地提取高频信号，提高了测试精度和效率。

The advanced DASP ( Data Alias-free Signal Processing) technology is applied to modern test instrument platform.

本文将先进的DASP（Data Alias-free Signal Processing）抗混叠信号采样技术运用到现代测试仪器平台中。

Application of DASP Technology in Modern Test Instrument Platform

DASP技术在现代测试仪器平台中的应用

It could also improve the resistance to various diseases. After applying 3 times, 1/ 500 dilutions efficacy against Phytophthora infestans was 74.0%, 1/ 300 dilutions efficacy against Phytophthora parasitica dast was 78.2%.

同时它可以明显提高番茄对病害的抵抗能力，抑制病害发生，且3次施药效果更佳，500倍液第3次施药后对番茄晚疫病防效达到74.0%，300倍液对绵疫病可达78.2%。