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冷测
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  cold test
     Via the comparison of the simulation results of the cold test model with the cold test data of the model, a method for determining the resonant characteristics of the operating mode TE_(021)/TE_(031) and the main competing modes TE_(511) and TE_(221) is tried.
     通过对冷测模型的计算机模拟以及对冷测数据的分析,我们找到了确定腔体工作模式TE_(021)/TE_(031)和竞争模式TE_(221)、TE_(511)谐振频率的方法。
短句来源
     Finally, a output cavity loaded with a filter is computed and the computed result is analyzed and compared with cold test data in order to conform the reliability of this simulated computation method.
     最后通过滤波器加载输出腔的模拟计算结果与冷测结果的比较和分析,进一步验证该方法的可靠性.
短句来源
     The calculated results of six section uniform cavities are compared with the cold test measurements, the error is less than 0.035%.
     六个均匀盘荷波导腔体的冷测频率与计算结果比较,误差小于0.035%。
短句来源
     The second, a complete simulation computation method for output circuit of broadband klystron is developed, basing on existing program ISFEL3D for simulation computation of three dimensions electromagnetic field, principle of output circuit of broadband klystron and microwave network theory. Some practical examples are calculated and the calculated results are compared with cold test results, so that the reliability of the simulation computation method is proven.
     第二,基于现有的三维电磁场模拟计算软件ISFEL3D、宽带速调管输出回路原理和微波网络理论,建立了一套完整的宽带速调管输出回路模拟计算方法,并通过实际例子的计算结果和冷测结果的比较,验证了该模拟计算方法的可靠性。
短句来源
     The coincidence between the cold test data and the calculation result to a certain extent preliminarily verified the reliability of the field analysis method.
     冷测结果与计算结果在趋势上吻合较好,初步验证了场分析法的可靠性。
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  “冷测”译为未确定词的双语例句
     The results show that its bandwidth is above 18.0%(7.1GHz-8.5GHz) and its fluctuating gain is under 1dB; at the same time its maximum output power reaches 2.5kW, and its gain is 18dB, and its efficiency is above 18.4%.
     冷测模拟结果为:通带带宽35%(6.8GHz-9.7GHz),在27%的频率范围内其归一化相速差小于 0.04:热测模拟结果为:-1dB带宽18%(7.1GHz-8.5GHz),最大输出功率2.5kW,最大增益18dB,效率18.4 %。
     Method of simulation on coupled cavity slow wave structure cold-test characteristic
     耦合腔慢波结构冷测特性的计算方法
短句来源
     Design and Cold-measurement of Slow-wave System for Inductive Coupled Cavity Chain
     电感偶合谐振腔链型慢波系统的设计和冷测
短句来源
     As an example illustrates,the maximum resulting error between field analysis method and equivalent gap impedance method is less than 1.5%,and the maximum error between mode overlapping method and measurement data is 10%.
     计算表明,场分析法与等效间隙阻抗法计算结果最大相对误差为1.5%,阻抗叠加方法计算结果与冷测数据最大相对误差为10%。
短句来源
     The quasi-periodic boundary conditions in the computer code MAFIA is used to determine the effect on dispersion and on-axis interaction impedance of helical slow-wave structure parameter variations ,including width,thickness and relative dielectric constant of the support rods.
     本文介绍了用MAFIA软件的准周期边界条件计算螺旋线行波管慢波结构的色散和耦合阻抗等冷测特性的方法 ,并重点对慢波结构中各参数 ,特别是矩形螺旋线截面的宽度和厚度对其冷测特性的影响进行了分析 .
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  相似匹配句对
     The improvement of the Method in Testing Mercury by cold Atom Absorphotometry
     原子吸收汞方法的改进
短句来源
     Comparison of Hg's Detection Method by Cold-vapour Atomic Absorption Spectrophotometry between China and America
     中国和美国原子吸收分光光度法汞的比较
短句来源
     On cold fusion
     核聚变
短句来源
     Cold Mountain
    
短句来源
     The ability of detecting weak harmonics and frequency resolution of this method can be improved remarkably;
     能力;
短句来源
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  cold test
The sensitivity was 0.93 for the cold test and 0.83 for the electrical test.
      
The positive predictive value was 0.97 for the cold test and 0.94 for the electrical test.
      
The negative predictive value was 0.94 for the cold test and 0.87 for the electrical test.
      
The accuracy rate was 0.95 for the cold test and 0.90 for the electrical test.
      
The leucocyte response was significantly reduced in the males but was unaffected in the females in the cold test.
      
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  cold testing
Each then underwent provocative cold testing under controlled conditions using established protocols.
      
A copper prototype has been constructed and is being plated with PbSn for cold testing.
      
Some of the differences between various techniques of 'cold testing' corn have been examined.
      
"Cold" testing of the Bragg structures in frequency ranges of 60 and 75 GHz is performed.
      
Among them was a problem that was identified during cold testing of the system.
      
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In This paper, the basic principle and practical methods of widening the operating frequency band of TWT are deacribcd. In particular, a new mcthod of calculation, the region-separation method, is given for the axially slotted shield helix. Cold measurement on this loaded slowwase circuit has been done. By comparison between the results of the cold measurement and of theoretical calculation, if is shown that this new method gives more accurate results than S. F. Paik's method.

本文对行波管拓宽通频带的理论基础作了阐述,提出了拓宽通频带的方法,特别是对纵向金属条加载螺旋线提出了新的理论计算——分区计算法,并作了冷测实验。与目前等效传输线方法上仅有的派克法相比较,分区法更接近冷测的结果。分区法可供实际设计计算之用。

A computation method used for doubly reentrant cylindrical cavity of klystron is developed in this paper. According to equivalent principle of field the cavity is divided into three regular regions. The field in each region is supported by proper surface magnetic current density on the common surface and can be expressed as integrals of Green functions.The magnetic fields of two neighbouring regions are then matched on the common surface to yield a set of integral equations. By use of Galerkin's method these...

A computation method used for doubly reentrant cylindrical cavity of klystron is developed in this paper. According to equivalent principle of field the cavity is divided into three regular regions. The field in each region is supported by proper surface magnetic current density on the common surface and can be expressed as integrals of Green functions.The magnetic fields of two neighbouring regions are then matched on the common surface to yield a set of integral equations. By use of Galerkin's method these integral equations are transformed into a set of linear algebraic equations from which the eigenvalue, i. e. resonant frequency of the cavity, and magnetic current densities can be solved. And then another important parameter R/Q may be determined on the basis of the field distribution. Some computation results of cavities with typical dimensions are given and compared reasonably well with experimental data. It is shown that this method is superior to other numerical method (finite difference method or finite element method) in the following aspects: simplicity, higher accuracy, less inner stores, and less computing time.

本文发展了一种速调管双重入式柱形腔的计算方法。根据场的等效原理将腔体划分为三个规则的区域,每个区域中的场由界面上的磁流所支持,利用格林(Green)函数积分式可得到各个区域中的场。两相邻区域的公共界面上的场应当匹配。从场匹配方程可解得腔体的本征值——谐振频率,同时可从场分布求得腔体的另一重要参数R/Q。文中介绍了几种典型尺寸腔体的计算结果,并给出了与实验冷测数据的比较。

This paper presents a new problem on the filter properties of the axial conductor loaded helix. By using the equivalent transmission network analysis, it shows that the filter properties are different from those of the structures as suggested in narrow band TWT. In this kind of structure, the TWT can be constructed not only in narrow band operation, but also can be constructed in super-wide band operation.The theoretical analysis of the axial conductor loaded helix shows that its transverse impedance can be...

This paper presents a new problem on the filter properties of the axial conductor loaded helix. By using the equivalent transmission network analysis, it shows that the filter properties are different from those of the structures as suggested in narrow band TWT. In this kind of structure, the TWT can be constructed not only in narrow band operation, but also can be constructed in super-wide band operation.The theoretical analysis of the axial conductor loaded helix shows that its transverse impedance can be loaded lower enough even to 50 ohms and easy matched to the external coaxial coupler directly, while at the same time, it still maintains the coupling impedance in rather higher values and obtains high gain in TWT.The one of the distinguished advantage of the filter type slow wave circuit using in TWT is its property of suppression the BWO. Axial conductor loaded helix also has such kind of property. Dr. Otto Sauseng of USA in 1970 had adopted this kind of slow wave circuit in his TWT, no BWO occured, yet he gave no explaination. Actually, as shown in this paper, the suppression of BWO is due to the filter property of the structure. The TWT when using this kind of structure shows that the operation is quite stable. The theoretical calculation method of the axial conductor loaded helix as used in USA is the S. F. Paik's method, while in USSR the H. H. method is used. But these two methods mainly gave out the dispersion relations, no filter properties were pointed out, and no such kind of characteristics as the pass-band, the stop band, the suppression of BWO, the effect of the numbers of metalic conductor, the effect of the dimensions of the metalic conductor, and the effect of the position of the coaxial coupler, were revealed out. While in this paper, all these problems are analyzed and relations are given. Besides, the cold circuit experiment has been performed and the dispersion curve obtained is shown more close in this method than in S. F. Paik's method, and the match of the input coupler in super-wide band is also quite well. Therefore this filter analyzing method can be used to design such kind of loaded helix for super-wide band TWT.

本文首次指出了纵向金属条加载螺旋线的滤波性质这一新问题。这种慢波结构的滤波性质有别于过去国外所提出的滤波螺旋线。它不仅能够构成窄通带的行波管,而且也可以构成超宽通带行波管。其次,用它作为行波管的慢波线时,它的横向阻抗可以压低,易于与外接耦合头直接匹配,而它的耦合阻抗仍可保留较高的数值,使行波管在超宽通带范围内仍可获得较大的增益分贝数。滤波性慢波线行波管的另一优点,是它的抑止返波振荡的性质。纵向金属条加载螺旋线同样具有此一性质。 本文对纵向金属条加载螺旋线的滤波性质作了理论分析,对它的色散特性作了冷测试验,两者有良好的相符。 纵向金属条加载螺旋线的计算,在美国系用Paik的方法,而在苏联有方法。这二个方法仅解决了色散的计算,而完全没有涉及滤波的性质,因而也没有提出诸如通带、禁带、抑止返波振荡、金属条数目、金属条宽窄和激励头地位等等的性质和问题。本文的理论分析对这许多问题均作出了回答,理论分析符合冷测结果,因而它可供设计计算之用。

 
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