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As the first investment in China, IDG, the first investment to focus on the high-end fashion website--yoka, its investment process is called venture capital investment in the early stage of enterprise business model. This is a venture capital to find the entrepreneurial team and start a business story. And the general entrepreneur to find venture capital (VC) for different money, Yoka investment in the United States International Data Group (hereinaf
Dear Students:IDG Enterprise Member 2015 campus recruitment last Lecture/written examination Friday in hand to wait for you. Preach the end of the written examination immediately. The spot draws the millet handset. October 24, 2014 19:00-21:00, no. No. 200, Minhang Tieshenggou Hall, Jiao Tong University, Friday Minhang's Jiaotong University is very far, fortunately has the female friend accompanies me, sits two hours subway. I had a written test that night, and then I had an interview the
Tags: IDG, inverse, Poland, four arithmetic operations Analysis First, convert the infix expression to the suffix expression (inverse polish expression), and then use the stack for calculation. Parentheses and decimals are not considered. Code Import Java. util. using list; import Java. util. list; import Java. util. stack; public class expcal {public static double calc (string exp) {If (exp = NULL | exp. length ()
The team is the biggest risk Venture capitalists have virtually no way to evade risk. First, we do not manage the company, we are only a small shareholder, generally not more than 30% of the shareholding. Secondly, there is little we can do all day long, and only when the start-up company is in trouble will I be able to get to the place as soon as possible. In the United States, the general rule of investors is that the project radius does not exceed 200 to 400 miles of range. In other words, 20
"Internet +" to promote the traditional enterprise replacement, in particular, the need for it talent increasingly abundant, throughout the recruitment site, there are smart links, 51job, hunting and other large recruitment sites in China, There is no web site dedicated to it talent needs , services, recruiting, and communication for it professionals. Often see QQ group to send recruitment information and send part-time information such as a lot of people, we have a strong desire for talent
Power is like the heart of a computer, which plays a key role in stabilizing the power supply. As long as the power supply plug in, there will be work, even if not on, the internal standby power is still to work, so the computer power is also more prone to faulty hardware, especially some inferior power supply. Small series has been engaged in a year of power mai
The adjustment tube of the linear power supply is working in a magnified state, so the heat is generated and the efficiency is low (about 35%). A large heat sink is required, and a large power frequency transformer is also required, the transformer will be larger when multiple voltage outputs are to be made.The adjustment tube of the switch power supply is working in saturation and cutoff state, so it has a
Developers must understand the concept of switching power supply (features of the Power Supply Module) 1. Concept of switching power supply The switching power supply (Power Supply Module) is an energy converter. As a power supply
Tags: DC regulated power supply DC regulated power supply -- RD-1005 Product Introduction The RD Series Digital DC Stabilized Current power supply is controlled by an efficient chip. It adopts the IGBT module adjustment mode and features such as high performance, high precision, and high stability. It is equipped with multiple auxiliary functions, this makes it
1-4-3. Calculation of energy storage inductance of the parallel switching power supplySimilar to the numerical method used to calculate the energy-saving inductance in the inverted series switching power supply, the energy storage inductance of the parallel switching power supply is also analyzed starting from the critical continuous current state of the current flowing through the energy storage inductance
1-3-2. Calculation of energy storage inductance of inverted series Switching Power SupplyThe calculation method of the energy storage inductance of the inverted series switching power supply is basically the same as that of the previous "calculation of the energy storage filter inductance of the tandem Switching Power Supply". The value of the energy storage inductance in the inverted series switching power
(1) Concepts A Linear Power Supply typically samples the output voltage and sends it to the Compare voltage amplifier with the reference voltage. The output of this voltage amplifier serves as the input of the Voltage Adjustment tube, it is used to control the adjustment tube so that its junction voltage changes with the input, so as to adjust its output voltage. However, the switching power supply changes
1-2-3. Calculation of energy storage filter inductance of tandem Switching Power SupplyFrom the above analysis, we can see that the output voltage of the tandem switch power supply is related to the duty cycle D of the control switch and the energy storage inductance L, because the energy storage inductance L determines the current rise rate (DI/dt), that is, the output current size. Therefore, it is important to correctly select the parameters of the
If the power plant outputs "clean" high-quality power supply, but the power supply passes through transmission and distribution, it is affected by the damage caused by weather, user equipment, and human factors, power supply quality problems such as voltage overshoot, drop, interruption, and common mode noise are quite prominent. Especially in industrial environm
1-4-1. operating principle of the parallel switching power supplyFigure 1-11-A is the simplest working principle of the parallel switching power supply, and Figure 1-11-B is the waveform of the output voltage of the parallel switching power supply. In Figure 1-11-A, the UI is the operating voltage of the switching power supply, L is the energy storage inductance,
1-6-3. Calculation of circuit parameters of the switch power supply of the forward-facing TransformerThe circuit parameter calculation of the switching power supply of the excited transformer mainly calculates the energy storage filter inductance, the energy storage filter capacitor, and the parameters of the switching power supply transformer.Calculation of ener
The destoon homepage calls the region name of the purchase and supply information. The destoon homepage calls the region name of the purchase and supply information. the destoon supply information examples in this article mainly call the region name of the purchase and supply information on the destoon homepage. This i
7.3 Supply Chain Management and Information Technology Application The definition of supply chain management can be interpreted: "supply chain management design, planning, implementation, management, monitoring and constantly optimize the supply chain operations to achieve innovative value and improve the enterprise'
1-2-4. Calculation of the filtering capacitor of the series-connected Switching Power SupplyWe also started from the current flowing through the energy storage inductor as the critical continuous current state, analyzed the charge and discharge process of the energy storage filter capacitor C, and then calculated the value of the energy storage filter capacitor C.Figure 1-6 shows the voltage and current waveforms of each point in the tandem switching power s
1-2-2. Output Voltage filter circuit of the tandem switch power supplyMost of the output of the switching power supply is DC voltage. Therefore, the output circuit of the general switching power supply has a rectifying and filtering circuit. Figure 1-2 shows the working principle of the series-connected switching power supply with the rectification and filtering
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