利用真空的

The foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源，通过Simulink仿真和试验检验其满足设计要求，实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出；利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集，通过异步串行通信实现单片机与计算机之间的数据通信，将检测数据传至上位机；在上位机利用Matlab开发人机交互界面，实现相关数据处理和图形显示，包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

By the way of melting the filler will also bring the diffusion and the capillary attraction, and that the same or different kinds of metal can be welded well without melting the original material, especially the different ones and the complicated shapes.

利用真空硬焊制程来克服Al、Cu焊接时所产生的困难，藉由填料熔融产生原子扩散及毛细现象在不熔融母材的情况下结合同种或异种金属，尤以异种材质的接合或形状复杂难以接合的工件，皆可达到良好的接合效果。

Low temperature inspissation reflux's withdrawing a machine set is to synthesize a reflux, the 渗漉 withdraws, the against the current withdraws and takes out with hot reflux and lifts and condenses 4 kinds and withdraws principle, withdraw, condensing Chinese herbal medicine two work prefaces carry on in the meantime, a completion Chinese herbal medicine withdraws, concentrated new craft, and change and withdraw the work in the bottle and often press of heat decoction craft, make use of vacuum negative press and carry on low temperature and withdraw low temperature concentrated, make and withdraw work temperature in the bottle a control in 60 ℃~70 ℃, concentrated temperature control in 50 ℃~60 ℃, promised the medicine material valid composition to be steamed not and run off.

请各位英语高手帮忙，拜托，急用，有重谢！！请各位英语高手帮忙翻译以下内容，不要机械翻译，感觉不错定当加分重谢！！拜托，急用！！低温浓缩回流提取机组是综合了回流，渗漉提取，逆流提取与热回流抽提浓缩四种提取原理，将中药的提取、浓缩两道工序同时进行，一次完成中药提取、浓缩新工艺，并改变提取罐内的工作与常压的高温煎煮工艺，利用真空负压进行低温提取低温浓缩，使提取罐内的工作温度控制在60℃~70℃，浓缩温度控制在50℃~60℃，保证了药材有效成分不被蒸了流失。

In this dissertation, we construct the Bariev model with nine kinds of boundary fields by the matrices K_± defining the boundaries. And then the Lax operator is given in the form ofmatrix, as well as the basic quantities, e.g., the R -matrix, the monodromy matrices and the transfer matrices are defined. By using the expression of the local Lax operator of the model,the action of the monodromy matrices T, T~(-1), U_ on the pseudo-vacuum state is given outin detail. Furthermore, the main fundamental commutation relations are obtained through the reflection equations, the recursive n-particle state as well as the one-particle exact solution is given and the Bethe ansatz equations are found accordingly. Finally, we list the nesting boundary K matrices, which play a crucial role for obtaining the n-particle solution and finding the Bethe ansatz equations, the eigenvalues of the transfer matrices and the energy spectrum of the system by means of the nested algebraic Bethe ansatz method.

在这篇文章中，我们利用边界K_±矩阵构造出了具有九种边界场的Bariev模型，同时给出了该模型L算子的具体矩阵表示形式，并定义了R矩阵，monodromy矩阵以及转移矩阵；接着利用L算子的矩阵形式，给出了其对应monodromy矩阵T、逆矩阵T~(-1)作用到真空态上的值，并利用Yang-Baxter关系及反射方程得到了双行monodromy矩阵U作用到真空态上的值；然后利用反射方程通过复杂的计算得到了一系列重要的基本对易关系式，并给出了模型的递推的多粒子波函数、单粒子解及Bethe ansat方程；最后给出了模型的嵌套的边界K矩阵的具体形式，从而为运用嵌套Bethe ansatz方法求解该模型的多粒子解、Bethe ansatz方程以及系统的能谱打下了很好的基础。

First by testing the practical multilayer insulation in a cryogenic tanker, which is the carilometer in my paper,some affecting factors on multilayer insulation are analysed, then by using the low-temperature and vacuum environment caused by multilayer insulation, the effective thermal conductivity of multiple fiber paper with 5 layers is tested.Through Newton interativemethod,an empirical formula is deduced to computer the thermal conductivity of fiber paper,The errors between experimental thermal conductivity and the calculated conductivity by empirical formula are below10%,so the formula of fiber conductivity can be applied to practical enginnering.

为探索改善工程应用中高真空多层绝热层绝热性能的方法，本文实验研究中首先测量了包扎在实际低温储罐上不同结构的高真空多层绝热层的绝热性能，并分析了环境温度、环境压力，层数、不同隔热材料的组合等因素对工程应用中的高真空多层材料绝热性能的影响；然后利用多层绝热层中的低温真空环境测量5层干法纸在不同温度区间内的表观导热系数，在有限实验数据的基础上用牛顿迭代数值拟和出计算5层干法纸表观导热系数的经验公式，对比经验公式计算值和实验测量值，发现二者的误差在10%以内，因此在工程应用中可用本文的经验公式计算干法纸在低温下的导热系数。

In this paper, the principle in measuring the vacuum of sealed vacuum device with Penning discharge is analyzed, the Penning discharge model of sealed vacuum device is established, the experimental device is designed, and pressure-ion current chart is presented.

分析了利用潘宁放电来测量两个电极的密封电真空器件真空度的工作原理，设计了测试实验装置，初步建立了密封电真空器件的潘宁放电模型，给出了有关实验数据。标签潘宁放电密封电真空器件真空度 Penning discharge sealed vacuum device vacuum

The vacuum harrow dryer drying is a commonly used mechanical equipment, as a result of vacuum harrow dryer using heated jacket, vacuum exhaust, almost all of the different nature of the materials are different from state to apply, especially for explosive, easy oxidation, paste of dry materials.

摘 要：真空耙式干燥机是一种常用的干燥机械设备，由于真空耙式干燥机利用夹套加热，真空排气，几乎对所有不同性质、不同状态的物料都适用，特别适用于易爆、易氧化、膏状物料的干燥。

In the thesis,the principle of vacuum creating in pre-coated mud filter is explained,the problems existed in the vacuum system design are analyzed.

阐述了预挂过滤机真空形成的原理，分析了在真空系统设计中存在的问题，提出了通过利用滤液排出管形成的水腿效应来改进和优化真空系统设计的意见。

With the established model and the data of power needed in cycle cooling water system, the best vacuum value of condenser can be determined, and energy loss result by deviation of some main operation parameter can also be determined, compared with conventional models , the model established by us has the advantage of pertinence to the actual equipment since the sample data were collected from the operating equipment.

利用该模型和循环水系统功耗模型可确定不同工况下的真空运行最优值，为凝汽器真空运行最优值的确定提供了一个全新的方法，同时利用该模型计算几个主参数偏离基准值的能损偏差，同传统的运行参数基准值模型和能损偏差分析方法相比，该模型具有明确的设备针对性。

Presently there exists no convenient method to determine the baking temperaiure for glass vacuum chamber which uciuall plays an important role in the acement of required vacuum circumstance in high-vacuum system made of glass,In this paper approximate method was represented to calculate the baking temperature of glass surface by the emissivities of appropiate materinl surface,determining the baking temperature difficult to be tested by the relation ship recommanded by the paper and the indication of an ausa...

在高真空系统中，真空室的烘烤温度对获得要求的真空氛围有着重要的影响，对于玻璃制作的真空系统，目前对于该温度的确定缺少一种较为简单易行的方法，本文基于辐射换热分析提出了具有通用性的利用材料表面辐射率来计算玻璃表面烘烤温度的近似方法，将这难以直接测量的温度通过附设热电偶的示值和本文推荐的关系式来确定，于实际情况相比较为吻合。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。