大功率的

We use the single chip PIC18F452, as the center control circuit, and through the measurement of open circuit voltage and short circuit current to get the current system impedance, then force the apparent load impedance to match it to make the solar system working on maximum power point.

本论文使用阻抗匹配法的最大功率点追踪技术，将能有效预知下次的最大功率点位置，使系统维持工作在最大功率点上，达到最大功率输出的目的。

Later, it makes some comparison with four kinds of modulation technique, and finally, it implements the three-level PWM switching power amplifier with the PWM technique. The power of the amplifier is 2kVA, and the frequency bandwidth is 10～3kHz. In the thesis, the author designs and makes the hardwares of the switching power amplifier. The hardwares contain power inverter rank circuit, control system circuit based on DSP, drive and isolation circuit, and protective circuit. The thesis also analyses the potential safety problems and put forward some solutions for the problems. Furthermore, the thesis accomplishes the software design of the control system, and successfully debugs it. The methods of designing higher power ampilfier are also discussed in the thesis. It analyses the feasibility of the methods, outlines the way of how to design higher power switching power amplifier, and does some experiments with the method of switches-parallelling.

根据电动振动试验系统对开关功放的要求，提出了以电感电流瞬时值控制技术为基础的三电平脉宽调制开关功放的设计方案，并通过系统仿真进行了原理性论证；然后设计并制作了开关功放的硬件，包括功率转换电路，基于DSP的控制电路，驱动、隔离电路以及保护电路；针对开关功放数学模型不易得出的特点，细致分析了模糊自适应PID控制方法，在此基础上编写了控制程序；研制出一台功率为2kVA，通频带为10～3kHz的三电平脉宽调制开关功放；论文中还探讨了实现大功率开关功放的方法，分析了各种方法的可行性，给出了实现大功率开关功放的思路，并进行了并联开关管实现大功率开关功放的实验。

I have seen a documentary film about how does Picasso paint,about the process.they used a translucent paper,fit it on a frame,picasso with a superpower light behind him sit on one side of the paper,the other side is the camera,so people can only see the flowing of the line picasso painted and big area of colours.it's just like working with the Painter.

有一部记录片，拍摄毕加索作画过程，用的是一种半透明的纸，用框架固定，毕加索坐在一面，其后有一盏大功率的灯，纸的另一面安放摄影机，这样拍摄的就只有画本身，线条的自由流动，色彩的随意铺张，很像用painter作画时的感觉。

This study suggests that GaN-based TEDs have significant advantages for high-frequency and high-power microwave generation,which are perspective for high-power THz signal source applications.

本工作揭示出GaN转移电子器件在高频率和大功率输出方面都具有重要优势，作为大功率THz微波信号源将具有广阔的应用前景。

In the invention, a plurality of high power LED chips are integrated on a laminated base plate of aluminum nitride AIN and low temperature co-fired ceramic LTCC. The heat dissipating capability of the high power LED chips is improved from the levels of the underlay, a bond coat and the base plate.

本发明采用多颗大功率发光二极管LED芯片集成在氮化铝AlN和低温共烧陶瓷LTCC叠层基板上，从衬底、粘结层和基板三个层次上提高大功率发光二极管LED芯片的散热能力。

After years of research and explore, REPHON OPTOELECTRONICS MFG. CO., LTD has earned its reputation as "" brand abroad. It involves six featured product series as follows:1, LED high power application series products, including LED high power wall washer, LED high power floodlight, LED high power spotlight, LED high power T5/T8 fluorescent lamp, LED high power down light, LED high power street light, LED high power underwater light, LED high power underground light, LED commercial illumination products etc; 2, LED festival decorative lights, including LED twinkle light, string light, net light, curtain light, icicle light, fall light etc; 3, LED sign and strip series, including LED lighting bar, LED module, LED strips etc; 4, LED electronic application series, including LED digital tube, underwater and underground lights, LED dome light, LED fountain light etc; 5, LED rope light series etc; 6, LED household light series and construction application series etc.

日益丰光电科技有限公司经过多年的研究探索，秉承专业化的企业发展之路，公司旗下以&REFON&主打国外市场，&日益丰&主打国内中高档市场的双品牌运作模式，并在产品上已形成具有自己特色的六大产品系列：一、LED大功率应用系列，主要产品为LED 大功率洗墙灯、LED大功率投光灯、LED大功率射灯、LED大功率T5/T8日光灯、LED大功率筒灯、LED 大功率路灯、LED 大功率水底灯、LED大功率地埋灯、LED大功率商业照明和室内照明等；二、LED节日灯系列，主要产品为LED流星灯、LED 灯串、网灯、窗帘灯、瀑布灯、冰条灯等；三、LED广告应用系列，主要产品为LED灯条、LED模组、LED光条等；四、LED应用电子系列，主要产品为LED 护拦灯、LED数码管、LED点光源、LED水底灯、LED地埋灯、喷泉灯等；五、LED 彩虹灯系列等；六、LED民用照明和工程应用照明系列等。

It is composed of heater, sealing rubber rings, induction coil for heating, and high-power electronic device.

其结构包括加热器、橡胶密封圈、加热感应线圈、大功率电子元件，其中的加热器由非金属材料制作的基座、上盖、铁磁片、进水口、出水口组成，大功率电子元件是安装在进水口上，该大功率电子元件和进水口之间是互相绝缘的，基座的上、下端上有出水口、进水口，基座中间有凹槽，铁磁片放入该凹槽的底部，凹槽底部和进水口及出水口相连通，凹槽口上有上盖，基座和上盖之间有橡胶密封圈，基座的另一面上安放加热感应线圈，加热感应线圈和基座中的铁磁片相对应。

The main products of different colors for the sections of high-power LED spotlights (1W-15W), full-color high-power LED spotlights, colored sections of high-power LED (0.5W-100W), full-color high-power LED, various colors and ultra-high bright LED (white, blue, green, red, yellow), with backlight LED, helmet-shaped | straw hat type LED, piranha LED, the series of LED lighting lamps, LED flashlights and LED lighting products, OEM processing.

主要生产产品为各款各色大功率LED射灯（1W-15W），全彩大功率LED射灯，各款各色大功率LED(0.5W-100W)、全彩大功率LED，各款各色超高亮LED，背光源用LED、钢盔形|草帽型LED，食人鱼LED、各系列LED灯具灯饰，LED手电筒和LED照明产品的OEM加工等。

The design of microwave chemical reactor is a complicated engineering problem and needs not only microwave techniques but also chemical theories. So far, due to expensive high-power magnetrons and magic T, most of high-power microwave chemical reactors are too costly to be widely applied in chemical industry.

目前已有的大功率微波化学反应器大多使用昂贵的大功率磁控管，也有的反应器采用两个小功率磁控管，但需要昂贵的大功率隔离器件，这些都大大提高了系统成本，从而制约了微波应用在化工领域的大规模推广。

For example, the high-power speaker subwoofer will have a strong magnetic field, has repeatedly said that even though manufacturers are Magnetically shielded, but as long as you use detection equipment to detect you will know, this Antimagnetic small water or not, and the speaker in the use of the process or the opportunity to vent some magnetic.

例如音箱中的大功率的低音炮就会产生较强的磁场，尽管厂商一再宣称是防磁设计，但是只要你拿检测仪器去检测一下就会知道，这个防磁的水份还是不小的，而且音箱在使用过程泄磁的机会还是有的。

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。