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To improve the stability of Arcjet discharge plasma in low current and high voltage mode, research on the demand of output characteristics of Arcjet Power Conditioning Unit was conducted. In this paper, based on PWM invertors and current mode control, using MOSFET as the main power device, an Arcjet Power Conditioning Unit was developed. Through adding a closed loop feedback circuit of output voltage, it can make the output characteristics of PCU be positive resistance to ensure the stability of Arcjet discharge plasma. The experiment indicates that this PCU can make Arcjet engine work at high voltage mode (100 V, 10 A) and ensure the stability of arcjet discharge plasma. Finally, it provides the experimental data of Arcjet when working.

为了解决小电流、高电压下电弧火箭等离子体的稳定性问题，研究了电弧火箭发动机对电源调理单元的输出特性要求，基于逆变电源脉宽调制技术与峰值电流型控制原理，以MOSFET为主功率器件，研制了一台电弧火箭电源调理单元，给出了Arcjet工作时的实验数据，通过增加PCU输出电压的闭环反馈电路，可以使PCU的输出外特性呈现正阻性，保证电弧的稳定燃烧，实验结果表明，该电源调理单元能使电弧火箭发动机达到高电压工作模式(100V， 10A)，保持电弧工作的稳定性。

Especially leader of a few industries describes: On one hand oneself are anxiety-ridden, everyday busy move looks for a bank to run loan, look for big client to make a sale personally, find governmental mediate between two parties to pledge from Wu of custom, duty, land the joint of each respect such as check, quota, environmental protection, all such as resource of company strategy, sale strategy, product strategy, financial security, technical reformation, manpower should is based on " hibernate " and think afresh, opening the cost on source and reduce expenditure to use up idea, seem to return sunset night ground should be done not have when doing poineering work at first hardworking; On the other hand, must continue to maintain successful personage have a well-thought-out plan, weight lifting to be like light demeanour again however, face subordinate, always get the difficult mention lightly that may encounter the company with future now, place all a pair of manner that all mastering.

尤其是一些企业领导者形容到：一方面自己忧心忡忡，每天忙着找银行跑贷款，找大客户亲自做销售，找政府疏通从海关、税务、土地到质检、配额、环保等各方面的关节，公司战略、营销战略、产品战略、财务安全、技术改造、人力资源等样样都要基于&过冬&而重新思考，在开源和节流上费尽心思，好像回到最初创业的时候要没日没夜地苦干；另一方面，却又必须继续保持成功人士胸有成竹、举重若轻的风度，面对下属，总是得把公司现在和未来可能会遇到的困难轻描淡写，摆出一副一切尽在掌握的架势。

As for not wanting to work at all, it is unthinkable, for society is not used to loafers.

如果不想工作，简直是不可思议的。

As for not wanting to work at all, it is unthinkable, for society is not used to loafers.

因为我们的社会看不起游手好闲的人。

The Magna Carta of the Argentine Locksmiths' Union prohibits us from doing any work at that address.

阿根廷锁匠工会基本章程禁止我们在该地址作业。

The 5mV of the audio signal which comes from the microphone to linear amplificated by the audio signals amplifier,then mixes with music signals from other sound sources(eg:the tape 、CD) by the hybird amplifier . By the control of the digital volume controller the mixed signal ,then amplificated again by the preamplifier,when integrated power amplifier for idling time realizes the signal enlargement factor respectively is 10、100、1000 times;moreover is capable of delivering 3V of output to a 600%26Omega; load. the amplificate signal makes the loudhailer work at last.

该音频信号放大器能够将来自话筒5mV的音频信号进行线性放大，然后和来自其他音源的音乐信号通过混合放大器来混合，混合后的信号经数字音量控制器对高低频的增益进行提升与衰减，再通过前置放大器放大，当集成功率放大器为空载的时候实现信号的放大倍数分别为10、100、1000倍；另外再实现当负载为600%26Omega；的时候，输出幅度为3V，最后经扬声器发出悦耳的声音。

He had the "Love-sonnets from the Portuguese" in mind as he wrote, and he wrote under the best conditions for great work, at a climacteric of living, in the throes of his own sweet love-madness.

他写时心里想着《葡萄牙人的爱情十四行诗》。他的诗是在产生伟大作品的最佳条件下写成的：在生活的紧要关头，在他因甜蜜的疯魔而痛苦之际。

Some fairly simple but slightly up-front costly legislative work at the state and federal level would drastically reduce the amount of molar tooth decay that Americans accept as "normal" and would make us all richer in the long run.

有些相当简单，但略高于前期昂贵的立法工作，在州和联邦一级将大幅减少磨牙龋齿数量美国人认为是&正常&的接受，将使我们所有人创造更丰富的长远之计。

You know, there are a lot more work-at-home moms than you'd imagine.

你知道吗，在家工作的妈妈比你想象中还多。

I will work at my own pace and time.

我将努力在自己的进度和时间。

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。