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隆领投资具体哪一年成立的?求告知
辛少杰
2020-01-21 21:45:00
推荐回答
隆领投资成立于2008年,由著名天使投资人蔡文胜先生创办的股权投资机构。隆领投资主要专注于互联网及TMT、文化创意、艺术品领域的投资方向。隆领投资通过提供全方位的支持,帮助了创业公司的顺利启动和快速成长,开创了一批具有价值和市场潜力的产品,培育了众多创新人才和高科技企业。
黄电锋
2020-01-21 21:54:05
提示您:回答为网友贡献,仅供参考。
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其他回答
进入隆领投资的官网,主页即可查看相关信息。
aichapo
2020-01-31 10:59:07
我记得是2008年的时候。
bianhangcu
2020-01-31 10:59:07
2008年成立的。
赵高圣
2020-01-21 21:59:07
相关问答
英语国家留学如何选择大学和专业?
一、翻译类专业说英语类专业学生出国无专业背景是不客观的,英语类专业毕业生,在申请翻译类相关课程,优势还是比较明显的。大多数英国院校翻译,特别是口译专业,对同学申请时雅思要求非常高,不是大家传统意义认为,英语成绩均错就具备申请条件的。那么英语类专业毕业生的“专业”优势,就体现出来了。英国巴斯大学、纽卡斯尔大学、利兹大学、华威等院校的翻译或同传专业都比较牛,巴斯、纽卡、约克、利兹等英国名校作为威久的授权合作院校,二、TESOL或教育类TESOL全称"TeachingEnglishtoSpeakersofOtherLanguages",可以翻译为对外汉语教学,该专业的目的是培养成为教导非英语系国家的人使用英语的教师,并不是像一般人所想只要英语能力好都可以胜任的工作。就算是以英文为母语的人,还是必须接受专业训练,才能够正确且有效的教导非英语系国家的人英文。所以,学成之后,专业性是要远强于单纯的英语专业毕业生的。在英国有不少优秀的大学提供该课程,比如:York、Newcastle、Stirling、Liverpool等。TESOL专业一般会要求学生有语言学方面的背景。此外,还有一些院校也可以接受没有语言专业背景但是热爱英语教学专业的申请人,比如Newcastle大学。该大学语言系实力强大,此专业深受学生好评。三、传媒类专业英语专业毕业生在英国也可以申请传媒类相关专业,因为英国大学传媒类专业对学生的本科专业背景是没有要求的。更侧重的是学生对此类课程的兴趣和自身的综合素质,所以一般要求学生是文科背景即可。目前,英国还有很多大学的传媒硕士可以接收本科阶段没有传媒专业背景的学生,如莱斯特大学、纽卡斯尔大学等。四、商科管理学课程英国大部分学校,对于商科的管理类课程是不要求本科商科背景的,英语类学生转专业申请,对商科的咨询和申请也是我们接触最多的,商科作为英国的传统优势专业。如果学生立志从事此类职业,是完全可以申请到理想大学的。尽管对于想留学英、美、澳等国家的学生而言,转专业申请可选择的余地越来越宽泛,但威久留学专家建议,对于不是真的对本专业不感兴趣,而仅仅因为热门才选择申请到国外转专业读研究生的本科毕业生而言,还是不要轻易放弃本专业,这样被名校录取的把握会更大,同时由于专业基础知识扎实,学习过程中也不会很吃力。官方电话官方网站向TA提问。
高分求教“高盛”在这次金融危机中的表现
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英语专业适合什么工作?
,看你的留言问题,你应该是在读学生或将要毕业。所以我详细同你说下英语专业可以从事的工作给你,希望对你的就业方向有帮助;英语专业,从事的工作如下:一,外贸业务员二,外贸跟单员三,外贸单证员四,外贸报关员五,外贸货代员六,英语翻译专员七,英语老师八,导游。
求一篇有关电力系统的英文文献最好带翻译不胜感激
sorry,无中文翻译,有但超过字数First, introduction an ideal electrical power system is by the sole constant frequency and the stipulation peak-to-peak value regulated voltage power supply. But in fact, as a result of the recent years along with science''s and technology''s unceasing development, the high efficiency traded the class equipment and the modulator use, high in the electrical power system presses the nonlinear element which the direct current transmission the application, the massive misalignment load''s appearance as well as the power supply system itself existed and so on to cause in the system''s voltage waveform distortion to be getting more and more serious, has caused the very big harm to the electrical power system, for example: Causes in the power supply system the part to lose increases, reduces current collector''s service life, to disturb the communication system and so on. Serious when even can also cause equipment the damage, automatic control malfunction, relay protection misoperation, thus creates the power cut accident and so on and other questions. So-called " the friend knows other, is undefeated in many battles ", therefore, must realize to the electrical network overtone comprehensive program of public order, must make clear the overtone origin and the electrical network in under the each different movement way the overtone tidal current distributed situation, adopts the corresponding measure limit and the harmonic cancellation, thus changes the friendly power supply system power supply quality and guarantees system''s security economy movement.Second, electrical power system overtone''s origin in the electrical power system the overtone source is many and varied. Mainly has the following several kinds: in 1, system''s each kind of misalignment current collector for example: Trades the class equipment, the modulator, the electrification railroad, the arc furnace, fluorescence the lamp, the domestic electric appliances as well as each kind of electronic energy conservation control device and so on is the electrical power system overtone important source. Even if these equipment supplies its ideal sine wave voltage, it uses the electric current is also non-linear, namely has the harmonic current existence. And these the equipment produces the harmonic current will also pour into the electrical power system, will cause system each place voltage to have the harmonic component. These equipment''s harmony the wave content decided that in its characteristic and the working condition, basically has nothing to do with the electrical power system parameter, may regard as overtone constant flow the source. 2, the power supply system itself exists the nonlinear element is overtone another origin. These nonlinear element mainly has the transformer to stir up the capacitor which, the reactor group the magnetism leg, the alternating and direct convertor station''s silicon-controlled rectifier controlling element, the silicon-controlled rectifier control and so on.3rd, like the fluorescent lamp, the domestic electric appliances and so on single capacity is not big, but quantity and spreads very greatly in each place, electric power department with difficulty management current collector. If these equipment''s current harmonics content is oversized, will then have the serious influence to the electrical power system, to this kind of equipment''s current harmonics content, when manufacture namely should limit in certain quantity scope. 4, the generator send out overtone electric potential. The generator will send out the overtone electric potential at the same time also to have the overtone electric potential production, its overtone electricity the potential will be decided by generator''s structure and the working condition, basically will have nothing to do with the external connection impedance. Therefore may regard as overtone constant pressure source , but its value is very small. the three, electrical power system overtone tidal current calculates the so-called electrical power system overtone tidal current computation, is through solution network equation In=YnUn n=3,5,7 ...... n: Agrees wave number the number. In is the overtone source load pours into electrical network''s n subharmonic electric current row vector. Yn is electrical network''s n subharmonic conductance. Un is in the electrical network a various nodes bus bar n subharmonic voltage row vector. Obtains in the electrical network various nodes bus bar the harmonic voltage, enters to obtain in various legs'' harmonic current.When in the electrical power system the existence has the overtone source, this time in the system the contact voltage and the branch current will have the higher harmonic. For the determination harmonic voltage and harmonic current''s in power supply system distribution, needed to carry on to the overtone impedance constitution equivalent circuit the tidal current computation, when simultaneously in the rectifier unit power supply system possessed forbearance the part existed, but must act according to various legs overtone impedance the nature and the size, whether there is examined the resonant situation. carries on the overtone tidal current computation, must first determine the electrical network part''s overtone impedance. 3.1, electrical network each kind of part''s overtone impedance: 1, synchronous generator''s overtone impedance the qualified generator''s electric potential is the pure sine, does not include the higher harmonic, its generator electric potential only exists in the fundamental wave network. in higher harmonic network, because the generator overtone electric potential is very small, this time the visible generator overtone electric potential is zero. Therefore its and so on the value electric circuit is the junctor end and neutral point overtone reactance .And XGn=nXG1-------------1 in the formula XG1 is when a fundamental wave generator''s zero foreword, the positive sequence or the negative sequence reactance, has this subharmonic foreword characteristic to decide , if needs to take into account the network to lose, regarding the generator, may its impedance angle according to 85 degrees estimates, regarding the transmission line, part''s and so on transformer and load equivalent generators, may its impedance angle according to 75 degrees estimates. . 2, transformer''s overtone impedance the electrical power system overtone''s peak-to-peak value often is elevates along with the frequency weakens, therefore in the fundamental wave tidal current computation high tension line , often neglects transformer''s initiation leg and the capacitance between turns particularly. When calculates the harmonic current, only considers transformer''s leakage reactance, and thought that recognizes the frequency with the harmonic order to be proportional. Generally, as soon as transformer''s equivalent circuit simplifies for links to meet the original vice-mid-side node overtone reactance **** *** is the transformer fundamental wave leakage reactance. under higher harmonic''s function, the winding internal kelvin effect and approaches the effect to increase, by now transformer''s resistance harmonic order''s square was proportional approximately with the , this time''s transformer overtone impedance is: Zn=sqrtnRT1+jnXT1-------------------------------3 And RT1 is the fundamental wave time-variable depressor''s resistance. regarding the three-phase winding transformer, may use the star equivalent circuit, on its overtone impedance computation side Fathom. when the overtone source pours into when higher harmonic current three-phase not symmetry, then must figures out the three-phase overtone impedance according to transformer''s wiring way and various forewords impedance meter . 3 reactor''s overtone impedance , when only takes into account the reactor induction reactance, to the n subharmonic frequency is: XLn=Nxl*UN/sqrt3IN 4, transmission line''s overtone impedance the transmission line has the uniform distribution parameter electric circuit, passes through the transmission line which change positionss completely to be possible to regard as is three-phase symmetrical. in tidal current computation, usually by lumped parameter PI equivalent circuit expression. Following chart: in takes into account in the distribution characteristic situation, then: ZLn=Znshrnl Yln/2=chrnl-1/Znshrnl ZN and RN respectively be regarding in this subharmonic when line''s wave impedance and propagation constant. Zn=sqrtZ0n/Y0n Rn=sqrtZ0nYon Z0N and Y0N respectively be this subharmonic when transmission line unit length impedance and conductance five, load overtone impedance .When overtone tidal current computation, the fundamental wave part may pour into power regarding according to the node, but regards as in the overtone network it is the constant impedance, may think that approximately the synthesis load is an equivalent electric motor. Its synthesis load''s overtone equivalent resistance value is: ZN=SQRT N R1+JNX1 R1, X1 is the fundamental wave equivalent electric motor''s negative sequence resistance, the reactance, its value may by this node fundamental wave voltage, power the value obtain after the conversion. the zero foreword electric current will not enter the load generally, thus in zero foreword''s higher harmonic network, may neglect shoulders the leg. when after has determined in the electric circuit various electrical element''s overtone impedance, may constitute an overtone function equivalent circuit, with the aim of carrying on the computation, under when plan overtone function equivalent circuit should pay attention to the following several characteristics: 1, the overtone function''s equivalent circuit, should take the rectifier unit as a center, according to actual wiring constitution, therefore the rectification installs to set regards as the overtone source, but electrical power system''s generator is not appears by the energy, but as overtone source loaded impedance part. 2, the circuit element impedance may use the famous value to carry on the computation, may also use the sign Yao value to carry on the computation. When uses famous value carries on the computation, the complete electric circuit should convert to some voltage reference, is advantageous for the analysis and the application. 3 in the general computation, part''s all resistances may neglect, but when system some part occurs either close parallel or strings together the joint resonance, this time''s resistance influence actually cannot neglect. 4, in harmonic current approximate calculation, what determined is the rectifier unit side total harmonic current, according to and so on overtone function the effect electric circuit, can determine various legs harmonic current and the voltage distribution. the 3.2nd, overtone tidal current calculates 3.2.1, not to allow the part network overtone tidal current to calculate 1, symmetrical system''s overtone tidal current to calculate in the symmetrical system the three-phase situation to be the same, therefore may calculate according to a situation. when has determined the rectifier unit, no matter what after one side total harmonic current, the union overtone equivalent circuit, may determine in the system network, no matter what a leg''s harmonic current distribution. Then again pours into the harmonic current according to the node harmonic voltage and the node relational I=YU in its , Y is overtone conductance, might determine each place node harmonic voltage. Then may extract the tidal current power. It counts to calculate that the step is as follows: , the basis give the operating condition, by usual tidal current computational method solution fundamental wave tidal current. , according to the overtone source working condition, determined other related parameters and need to calculate harmonic order. , calculates various parts overtone parameter, forms various subharmonics node admittance matrix, and calculates the corresponding overtone net to pour into the electric current. , by type IN=YNUN determined that various nodes the harmonic voltage, and calculates various legs harmonic power. in which, should pay attention has the overtone injection current which the overtone instrumental measurement leaves, its phase angle is opposite in the fundamental current phase angle. Therefore after extracting the fundamental current, must carry on the overtone injection current phase angle the revision. Similarly, the system node''s power is the fundamental wave power with agrees sum of the wave power, therefore the fundamental wave pours into the power also to carry on the revision. But the linear load''s place fundamental wave pours into the power not to need to revise. 2, the symmetrical system overtone tidal current calculates in the symmetrical system, the three-phase situation is various, moreover mutual influence, must therefore simultaneously carry on three-phase system''s idea to calculate. the symmetrical net tidal current''s computation may divide into the network various subharmonics network, calculates the fundamental wave network first, after obtaining various nodes fundamental wave the voltage, calculates various overtones tidal current according to it each injection current, then presses this overtone injection current to resolve various subharmonics net to wind the equation, extracts various nodes various subharmonics voltage. 3.2.2, in the rectifier unit power supply system possesses forbearance the part has when the overtone tidal current to calculate , when in the rectifier unit power supply system possesses forbearance the part exists, the capacitor to rectifier unit''s phase change process and voltage current wave the shape is influential. Generally under the base frequency, the induction reactance and the capacitance leg''s parameter differs really in a big way in the value, does not send produces the resonance effect, but a rectifier unit''s non-sinusoidal return route, may regard as is several different frequencies and oscillation amplitude sine electric potential the comprehensive result which affects separately in the return route, because the induction reactance frequency characteristic and the capacitance frequency characteristic are just opposite, have the possibility subharmonic both value to be close in some under the , have the resonance effect. When besides carries on the normal overtone tidal current computation, but also wants to act according to various legs overtone impedance the nature and the size, whether there is examines the resonance. four, summarize in the electrical power system''s overtone appearance, regarding the electrical power system movement is one kind " the pollution ". They reduced systemic voltage the unreliable profile quality, not only has affected electrical power system oneself seriously, moreover also harms the user and the periphery communications system. therefore to the electrical power system overtone''s research regarding the improvement electrical energy quality, suppresses with the harmonic cancellation has vital significance . 。
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