查询词典 three-centered arch

The calculated results of the arch dam stress by the present method can be used for safety assessment of arch dams according to the national arch dam design code.

表明用本文分析方法得出的应力结果可以按现行的拱坝设计规范规定的应力标准评价拱坝坝体安全度。

This research is very important to improve the safety of high arch dams against strong earthquakes. It provides science references for design of high arch dams and technical guidance for taking steps to reduce hydrodynamic pressures and dynamic responses of high arch dams in earthquakes.

研究了拱坝在强地震中的动水压力和降低动水压力的气幕隔震技术，对提高拱坝的抗震安全性具有重要的科学意义和实际价值，对高拱坝的抗震设计和采取工程措施减小动水压力提供理论依据和技术指导。

Trough the analysis of stabilization safety on Tengzigou arch dam, some conclusions are obtained in the following:(1) Tengzigou arch dam is safe under normal poll level ;(2) stabilization safety factor of Tengzigou arch dam is about 4-5;(3) It is proved that combinatorial reinforcement measures are effective and feasible.

对藤子沟拱坝的数值计算和模型试验分析表明：(1)藤子沟水电站在正常蓄水位作用下，坝体和两岸坝肩是稳定的；(2)藤子沟拱坝的整体安全度大概为4～5左右；(3)东北院提出的对左岸泥岩层挖除处理并用混凝土置换的加固除险措施经研究表明该加固措施是有效、可行的。

A study was performed of the randomness of external loads on high arch dams,including flood,earthquake,landslide of mountains,etc.,the weakening of concrete strength of arch dams and rock strength of dam foundation,and the fuzziness of evaluation criterion.The disadvantages of conventional deterministic assessment methods for the safety of arch dams based on the strength theory and stability theory were analyzed respectively.It is suggested that fuzzy mathematics theory should be introduced to safety evalua...

研究高拱坝洪水、地震、山体滑坡等外载荷，坝身混凝土、坝基岩石材料强度弱化等的随机性，以及评价准则的模糊性；分析了高拱坝分别基于强度理论和稳定理论确定性评价方法的不足，提出应该利用模糊数学方法解决具有随机性、模糊性的高拱坝安全评价问题；建立了基于结构可靠度理论的高拱坝失效概率故障树模型并给出了具体算例。

The arch was used by the early cultures of the Mediterranean area chiefly for underground drains, but it was the Romans who first developed and used the arch extensively in aboveground structures. Roman builders perfected the semicircular arch made of separate blocks of stone.

拱最初在地中海早期文化中用来建设地下水渠，但古罗马人最先开发和广泛的利用它作为地上建筑的结构，他们完善了由分段的石块组成的半圆形拱。

In this paper, resource and feature of three-dimensional data model to the arch tunnel and interior installation are mainly researched; design thinking of the arch tunnel model is given out; algorithms of three-dimensional model about tunnel body and the joint part of the adjacent to tunnel body are achieved; in addition, relevance algorithms of texture mapping technology to interior in tunnel body and three-dimensional model of interior installation of tunnel are also researched.

主要研究了拱形巷道及其内部设备三维建模的数据来源和特点；给出了拱形巷道建模的设计思路；研究了实现巷道体和相邻巷道体之间连接处三维建模的算法；另外也研究了实现巷道体内部纹理贴图技术及巷道内部设备三维建模的相关算法；研究了实现三维巷道漫游的算法。

The main products are as follows, three different step motors of YS series, the YY series electric capacity operates the asynchronous motor, YC (YC2) serial single-phase electric capacities start the asynchronous motor, the YU series resistance starts the asynchronous motor, asynchronous motor of electric capacity of a pair of value of YL series, three different step motors of Y series, three different step motors of Y2 series, YD series change the asynchronous motor of extremely many speeds, YH series are transfered to three different step motors of difference rate high, the YCJ series gear wheel moderates three different step motors, YEJ series electromagnetic to apply the brake three different step motor, YCT series electromagnetic to transfer speed three different step motor , YVP series frequency conversion transfer speed asynchronous motor , YSF series axle flow fan special-purpose three different step motor, Three different step motors of YZU series vibration source , the electronic device of YDF2 series valve uses three different step motors and YOX series limit distance type hydraulic coincidence device , ZLY spatters and makes such 28 series and more than 1500 specifications as the coil post tooth decelerator ,etc..

主要产品有：YS系列三相异步电动机、YY系列电容运转异步电动机、YC（YC2）系列单相电容起动异步电动机、YU系列电阻起动异步电动机、YL系列双值电容异步电动机、Y系列三相异步电动机、Y2系列三相异步电动机、YD系列变极多速异步电动机、YH系列高转差率三相异步电动机、YCJ系列齿轮减速三相异步电动机、YEJ系列电磁制动三相异步电动机、YCT系列电磁调速三相异步电动机、YVP系列变频调速异步电动机、YSF系列轴流风扇专用三相异步电动机、YZU系列振动源三相异步电动机、YDF2系列阀门电动装置用三相异步电动机和YOX系列限距型液力偶合器、ZLY渐开线圈柱齿减速器等28个系列1500多个规格。

On Earth's surface, iron comes in three flavors, standard crystalline forms known to scientists as body-centered cubic, face-centered cubic and hexagonal close-packed.

在地球的表面，铁以三种形式存在，就像身体一样科学家熟知的标准水晶线形态-空间立方体，平面立方体和紧贴一起的六边形。

In this paper we have calculated the surface energy of various crystalline planes as film surface for ten face-centered cubic metals, ten body-centered cubic metals and three diamond-structure crystals with Modified Embedded Atom Method.

本文应用改进嵌入原子法分别计算了十种面心立方金属、十种体心立方金属以及三种金刚石结构晶体的不同指数晶面作为表面时的表面能。

And a series of four-centered and three-centered transition states were obtained.

森林经营的历史性转变？？从砍伐天然林为主到砍伐人工林为主

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。