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  group
    In order to charge a group of capacitors within one second which capacitance is 32 μF and chargeing voltage is 50 kV,the charge system with three-phrase L-C resonance constant current circuit has been adopted.
    为了实现在1s内对50kV,32μF高压脉冲电容器进行快速充电,充电系统采用了三相L-C谐振恒流充电方式。
短句来源
    The Calculations of Three-Phase Dry Air Core Reactor Group Equivalent Inductive Reactance
    三相干式空心电抗器等效感抗的计算
短句来源
    Two Propositions for a sort of special conductor group
    有关一类特殊导体的两个命题
短句来源
    Analysis on High Freguency Resonance in Startup and Withdraw Test of Capacitor Group
    电容器投切试验中产生振荡的分析
短句来源
    Load Flow Calcuation for Transformer Group in V-V Connection
    V-V形接法变压器潮流计算
短句来源
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  formation
    GPRS's network formation used in electrical power system
    电力系统中GPRS应用的网方式
短句来源
    Study of 1000kV Insulator Type Selection and String Formation
    1000kV绝缘子选型及串方式研究
短句来源
    This paper describes fundamental principles and design proposals of battery formation using charging/discharging power supplies with high frequency,which is driven by the same sort of SCR and IGBT functioned as a new type of powered and electronic devices.
    在线巡检 ,分打印装置在蓄电池充 /放电过程中 ,适时自动显示、记录各单只电池的充 /放电电压、电流、充 /放电时间及容量等重要参数 ,并根据放电时间、放出电量 ,由低到高自动分排序打印 ,实现了蓄电池在化成充 /放电过程中的适时监测 ,自动排序分类、打印功能 ,为蓄电池的配销售提供了可靠的数据资料
短句来源
    There was no any experience with operation of 700 MW water turbine generators until Three Gorges Hydropower Station put into service. The focal points discussed in this paper are how to keep units stable and economic operation and generate more electric energy by scientific model formation and analysis.
    三峡电站投产之前在我国没有700MW大型水轮发电机的运行经验,因此如何通过科学的建模、分析,使三峡电站机稳定经济运行,多发优质电能是我们分析的重点。
短句来源
    Experiment shows that this power is accurate, fast, and easy to be controlled by net, which satisfies the requirement of large capacity Li traction battery formation.
    实验表明该电源控制精度高、响应速度快,响应过程无冲击,网能力强,可满足大容量锂动力电池化成的需求。
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  set
    Study on Elimination of Turbo-generator Set Vibration
    消除汽轮发电机振动的研究
短句来源
    Economic Analysis of 300MW Turbine Generator Set Produced by the Shanghai Turbine Works arisen from Forced Outage Rate
    国产300MW汽轮发电机的强迫停机率与经济分析
短句来源
    Vibration Failure Diagnosis of a Turbogenerator set
    汽轮发电机振动故障诊断
短句来源
    A Study of the Operational Characteristic Test of 31—25 Type Turbogenerator Set
    31—25型汽轮发电机运行特性实验的研究
短句来源
    Installation and Operation of the 300MW Turbogenerator Set Manufactured by Harbin Electric Machinery Works
    哈尔滨电机厂300MW汽轮发电机的安装和运行
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  series
    Application of Genetic Algorithm to Optimum Calculation for Series of Capacitors Reactors
    遗传算法在电容器—电抗器优化计算中的应用
短句来源
    A novel voltage balancing method for series connected supercapacitor strings
    一种新颖的串联超级电容器的电压均衡方法
短句来源
    It drives up to six white LEDs in series with a constant current to provide display backlighting for two (main and sub-) displays in cell phones and other hand-held devices with the input voltage ranging from 2.6V to 5.5V, and the maximum output current is 22mA.
    该电路输入电压为2.6V~5.5V,最大输出电流为22mA,采用串联方式驱动主、次两白光LED,驱动数目多达6个,可得到均匀的亮度。
短句来源
    In a 220kv substation with groups of parallel capacitors (with 4.5% reactor in series), the 3rd harmonics were seriously enlarged. Taking this as an example* this paper presents the relation between 3rd harmonic enlargement and grouped capacity of capacitors which has a 4.5- 6 % series reactor.
    本文以某220kV变电站并联电容器(串联4.5%电抗器)对3次谐波的严重放大为例,探讨了当串联电抗器电抗率为4.5%或6%时,电容器容量与3次谐波放大的关系。
短句来源
    A series of Nd09Ca01Ba2Cu3O7-δ samples with different oxygen content were fabricated by the solid-state reaction method and treated under different conditions.
    用固相反应法制备,并通过不同条件的热处理得到了一不同氧含量的Nd0.9Ca0.1Ba2Cu3O7-δ样品。
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  group
In all these cases we actually show that Γ=π1(M) has a finite index subgroup which is mapped onto a nonabelian free group.
      
We define a map from an affine Weyl group to the set of conjugacy classes of an ordinary Weyl group.
      
Open subsets of projective spaces with a good quotient by an action of a reductive group
      
The aim of the paper is to describe all open subsets of a projective space with an action of a reductive group which admits a good quotient.
      
Reductive group actions on affine quadrics with 1-dimensional quotient: Linearization when a linear model exists
      
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  formation
In the present study, two of the probable an umor marine compounds, manzamine A and sarcophine, were screened using benzo[a]pyrene (BP)-derived DNA adduct formation in MCF-7 cells as intermediary biomarker.
      
Most of the compounds were found to be very potent inhibitors of malondialdehyde (MDA) formation at 10-3M.
      
However, no significant inhibitory effect was obtained on superoxide anion formation.
      
Results of clone formation and Flow cytometry analysis (FCAS) suggested that prodigiosin has the capability of restraining mitosis by regulating the cell cycle.
      
These corresponding chalcones were reacted with phenyl hydrazide in glacial acetic acid, which led to the formation of novel 4-[5-(substituted phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol derivatives.
      
更多          
  set
We define a map from an affine Weyl group to the set of conjugacy classes of an ordinary Weyl group.
      
The propertyC1 resp.C2 is equivalent withG having a compact set of generators, resp.
      
Xi defined a partition ofWf into canonical right cells and the right order ≤R on the set of cells.
      
Let ζ-1/2 be the inverse on the set of regular elements ofu of a square root of the discriminant of.
      
We do this by using an explicit set of coordinates on the Schubert cell.
      
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  series
Finally we show for more than half of the infinite series that a presentation for the fundamental group of the space of regular orbits ofW can be derived from our presentations.
      
We consider 3-parametric polynomialsPμ*(x; q, t, s) which replace theAn-series interpolation Macdonald polynomialsPμ*(x; q, t) for theBCn-type root system.
      
This is done using a descending series associated to the complex structure and the Borel spectral sequences for the corresponding set of holomorphic fibrations.
      
The list consists of many series defined by simple equations, and of several exceptional superalgebras, among themE(3, 6).
      
We motivate and prove a series of identities which form a generalization of the
      
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  其他


This paper deals first with a preliminary discussion on the method for studying the criteria for vibration, and then gives a qualitative treatment of the various problems connected with the vibration of turbo-generator sets with regard to its detrimental effects on the turbo-machinery.Finally, in view of the problems existing at the present stage, the paper suggests the direction of the future study on this subject, and the tasks to be performed.

本文首先对研究振动标准的方法作了初步的探讨。其次,在定性分析的基础上,从振动对机的主要危害出发,对汽轮发电机振动标准的有关问题作了论述。最后根据目前存在的问题,提出了研究汽轮发电机振动标准的今后方向和任务。

Editor's Note: In recent years, the broad masses of teachers at our university have been going deep in practice and learning from workers, peasants and soldiers. They first abolished their old textbooks and then retained what is useful in it in a critical way. Innovating through practice, they have written a series of new textbooks, among which "Transistor Circuits" is one. The editing group of this textbook considers the suppression of drift plays an important role in the production of a high quality d. c....

Editor's Note: In recent years, the broad masses of teachers at our university have been going deep in practice and learning from workers, peasants and soldiers. They first abolished their old textbooks and then retained what is useful in it in a critical way. Innovating through practice, they have written a series of new textbooks, among which "Transistor Circuits" is one. The editing group of this textbook considers the suppression of drift plays an important role in the production of a high quality d. c. amplifier. The old textbooks did not offer any realistic solution to this problem which arised from production. Some authors(1)(2) have discussed this problem, but they all end up fundamentally at the same level of the equation (4-20) referred to in the new textbook. This equation tells the relationship between drift and some transistor parameters, but fails to explain it in a quantitative way. In order to enable the students to acquire knowledge that can guide them through productive activities, the editing group, with the help of the latest achievements of scientific works at home and abroad, have clarified the above mentioned quantitative relationship after carrying out a series of experiments. This attempt of theirs in the field of educational revolution has enabled them to write the following as a section of the "Transistor Circuits".

几年来,我校广大教师深入实际,向工农兵学习,对旧教材破字 当头,在批判中继承,在实践中创新,初步编写了一批新教材。下面选载的是 新编教材《晶体管电路》中的一节。 该书的编写认为,抑制零点漂移是制作高质量直流放大器的一个重要课 题。旧教材对于这样一个从生产中提出来的问题并未切实解决。有些专 著[1],[2]讨论了这个问题,但基本上与本文公式(4-20)相似。这个公式从理 论上解释了零点漂移与晶体管若干参数之间的关系,可是仍然没有给出零点漂 移与晶体管选配要求之间的定量关系。为了使学员学到的知识对生产实践确有 一定的指导意义,他们吸收了国内外著作中较新的科学内容,并通过实验,初 步弄清了上述关系,在教育革命的实践中写出了这部分新教材。

On the basis of high current density zinc air cells reported in our last papers[1],further improvement of air electrode technology has been made and further increase of current densities has been achieved. In May of this year, a zinc air cell system of 19 volts 800 amperes was assembled from two parallel connected 19 volts 400 amperes batteries and under the condition of forced air supply, starting tests of a certain heavy vehicle have been made. At the same time, two units of 24 volts 50 amperes zinc air cell...

On the basis of high current density zinc air cells reported in our last papers[1],further improvement of air electrode technology has been made and further increase of current densities has been achieved. In May of this year, a zinc air cell system of 19 volts 800 amperes was assembled from two parallel connected 19 volts 400 amperes batteries and under the condition of forced air supply, starting tests of a certain heavy vehicle have been made. At the same time, two units of 24 volts 50 amperes zinc air cell system were also assembled, and two tests has been made on a light motor cycle with electrical motor unit. In this paper, improvements on air electrode technology and results of these testing runs are reported in details.

在业已报告的高电流密度锌氧一次电池[1]的基础上,改进了空气极的制作工 艺,进一步提高了电流密度。在今年五月研制、装了19伏800安的锌空气电池(由 两个19伏400安的电池并联),在强迫通风的情况下,对某种车辆进行了起动试验。 同时,还装了24伏50安的锌空气电池两套,在装有电动机的轻型摩托车上进行了 两次行车试验。本文叙述空气极制作工艺的改进,和此次试验的结果。

 
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