A device for determining molar mass with freezing point depression was improved, which consists of the Dewar bottle, sample container, Beckmann thermometer, and motor stirrer.
介绍一个改进的凝固点下降法测定摩尔质量实验装置，它由保温瓶、凝固点杯、贝克曼温度计、电动搅拌器等几部分构成。
The ice/liquid mixtures of the coolant and the sample solution were respectively added in the Dewar bottle and the sample container to precool for 2~3 hours under stirring. Then some of the coolant liquid was replaced with coolant ice, the motor stirrer was restarted, and the temperatures were read from the Beckmann thermometer.
实验时，先调节寒剂的组成使其凝固点低于待测溶液的凝固点～2℃，然后分别在保温瓶和凝固点杯中加入寒剂和待测溶液的冰水，启动搅拌器预冷却2~3小时，接着更换保温瓶中的寒剂冰水，重新启动搅拌器，记录贝克曼温度计读数。
A device for determining molar mass with freezing point depression was improved, which consists of the Dewar bottle, sample container, Beckmann thermometer, arid motor stirrer, Before the experiment, the freezing point of the coolant was controlled about 2℃ below the freezing point of the sample solution by adjusting the composition of the coolant.
介绍一个改进的凝固点下降法测定摩尔质量实验装置，它由保温瓶、凝固点杯、贝克曼温度计、电动搅拌器等几部分构成。
The ice/liquid mixtures of the coolant and the sample solution were respectively added in the Dewar bottle and the sample container to precool for 2～3 hours under stirri...
实验结果显示，改进的凝固点降低法测定摩尔质量实验装置结构合理，其测定误差可控制在±0.001℃以内。
The types of containers in use are the dewar, cryogenic liquid cylinder, and cryogenic storage tank.
使用中的容器类型包括杜瓦瓶、低温液体钢瓶和低温储存罐。
The results show that the surface out-gassing is mainly responsible for the pressure increase, and that at 77K, the base pressure in the Dewar vacuum interlayer can be 5.0×10^(-4)Pa and maintained for a fairly long period of time.
研究结果表明：玻璃钢复合材料放气率是影响夹层真空度的主要因素；在液氮温度下杜瓦夹层动态真空度可达5×10^(-4)Pa，并可长期使用而真空度不变。
The pin configuration of the invention comprises an installation underlay 1 of the infrared detector, a down-lead circuit 2, a cold platform 3, a feed-through collar 4, a Dewar shell 5 and metal leads 6 with low thermal conductivity.
本发明的引线结构包括红外探测器的安装衬底1、引线电路2、冷平台3、引线环4、杜瓦外壳5和低热导率的金属引线6。
The design of adhesive joints of non-magnetic Dewar should base on the vacuum failure.
无磁杜瓦中粘接接头的设计应以真空失效为主要依据。
The mini Dewar is made of epoxy glass fiber reinforced plastic added in Al film.
这种微型杜瓦的制造材料是添加了一层铝箔的环氧玻璃钢。
In addtion, the effects of property parameters, the effects of the thread length, thread pitch and the adhesive thickness on the stress distribution and the stress level of adhesive joints region were discussed. The property parameters of the adhesive and GFRP should meet the certain requirement. When the liquid nitrogen is charged into the Dewar, the method should be adopted to decrease the peak transient thermal stress that the Dewar should be pre-cooled using the nitrogen gas, and then charge the liquid nitrogen.
此外本文尽可能宽的合理范围内讨论了物性参数变化、螺纹长度、螺距以及胶层厚度对粘接接头处应力分布以及应力水平的影响，对胶和玻璃钢的物性参数提出了要求，并建议加注液氮时可先用氮气预冷，以减小瞬时峰值应力。
General introduction: steel cylinders for low temperature liquid, abbreviated as Dewar flask, are usually used for the storage of the liquefied oxygen, nitrogen and ammonia; compared with ordinary high pressure steel cylinders, they feature low temperature, greater storing volume, cleanliness and high purity of the stored gas.
概况：低温液体不锈钢瓶，简称，通常用于液氧、液氮、液氩的包装；杜瓦瓶与一般的高压容器钢瓶比较，其性质特点是压力低、存量大，瓶体清洁，气体纯度高，适用于高精产品和用户要求减小钢瓶转换的次数。
The thermal stress analyses of the triangular and the trapezoidal thread edadhesive joints applied in the non-magnetic Dewar were conducted and compared using the ANSYS software.
用ANSYS软件对无磁杜瓦所用的三角形螺纹和梯形螺纹形式的粘接接头进行热应力分析和比较，结果表明其应力分布非常相似。
So, let's take for example, our new blended Scotch Whisky Dewar's 15 year old, the different malts and grains that contribute to the blend, were distilled and starting maturing in oak casks at least fifteen years ago.
举个例子来说，促成我们的新品苏格兰威士忌帝王15年的不同大麦和谷物至少在15年前就要开始蒸馏并在橡木桶中熟酒。
A suitable device was used instead of the original Dewar flask in the phosphorescence attachment of the spectrophotometer.
在磷光附件中使用了适当的装置以代替原有的杜瓦氏瓶。
Fabrication and Testing of Micro Piezoelectric Power Generator for Collecting Ambient Vibration Energy Conceptual design of the venting device for dewar of CR dipole superconducting magnet of FAIR
收集环境振动能微压电发电装置的制作与测试FAIR收集环二极超导磁体外杜瓦泄放系统的概念设计
1842 Sir James Dewar, Scottish physicist and chemist and inventor of the vacuum flask, was born in Fife.
1842年，苏格兰物理学家、化学家、真空管发明人詹姆斯.德沃尔爵士出生于法夫。
The control system for the pressure control in the helium dewar is designed and simulated.
最后，设计了制冷机停机工况下液氦杜瓦的压力控制系统并进行了动态仿真。
Experimental Study on Residual Gas Analysis of Exhausting from Infrared FPA Dewar
红外焦平面杜瓦排气残余气体分析实验研究
The Manufacture of Military Engineering Minisize Split FPA Dewar
军用工程化微型分置式焦平面杜瓦的研制
So we can use ab initio method and DFT to describe electronic structure of molecule and atomic group. Using Dewar, Chatt, and Duncanson's (BCD) model can count out the interaction energy between molecular orbit and metal state.
我们利用从头计算法和密度泛函方法描述分子以及原子团簇的电子结构，采用Dewar，Chatt，和Duncanson（DCD）模型可计算出分子轨道与金属态的相互作用能。