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Acquaint with to pull-push, the fly-back convertor, the forwared convertor, whole bridge, half bridge work appearance and principle.

熟悉推挽,单端正,反,全桥,半桥工作状态与原理。对电磁兼容和干扰有丰富改善经验。

The influence and design methods of leakage inductance on forward and flyback switching power supply ...

漏电感对正和反式开关电源的影响及设计方法。

The output power of interleaved flyback converter is two times high than that of flyback converter.

交错反变换器可将反变换器的输出功率提高1倍。

Firstly, the summarize of the development and actuality of flyback converter is given, and different snubber circuits applied in the flyback converter are analyzed and compared.

首先,对反变换器的发展与现状做了全面的概述,比较了反变换器各种缓冲电路的优缺点。

The effects of anti fatigue and oxygen deficient durable under normal atmospheric pressure of Fomes Officinalis Ames were observed in the fatigue test and oxygen deficient durable experiment in mice.

本研究采用抗应实验的方法,观察新疆药用层孔菌对小鼠抗疲劳能力以及耐常压缺氧能力的影响,比较给药组与对照组小鼠存活的时间,对测试结果的方差分析及多重比较表明,药用层孔菌具有很好的补益作用,能增加小鼠的抗应能力,同样条件下能延长小鼠的存活时

This paper takes dynamic ice force function as the cut-in point to solve theice-induced structural vibration.

本文以确定冰结构稳态响应下的励函数作为解决冰振动的切入点。

The mechanism of forced resonance and self-excited thermoacoustic oscillation are studied to understand the combustion oscillation in thermal systems.

针对热力系统中声耦合燃烧振荡问题,分析了强迫共振和热声自两类声耦合燃烧振荡的机理,重点综述了热声自振荡的若干驱动机制,并给出了防止声耦合燃烧振荡的措施。

Basing on the dynamic analysis of the forced vibration of the block, the extent and level of the vibration are investigated.

振力励下的机体强迫振动响应进行了动态分析,考察机体在振力的作用下的振动情况、振动评级,并联系穴蚀对气缸套外表面振动加速度进行评价。

The system is used to analysis the forced vibration, self-excited vibration and the propagation of disturbance in turbomachinery. Some conclusions are gained.

应用该套分析系统来分析叶片流体振的受迫振动,自振动和振荡流在多级叶排中传播的安全性问题,在具体应用中得到以下结论: 1。

In this paper we combined three chromatographic separation and purification technique such as affinity chromatography, ion exchanger chromatography and hydrophobic interaction chromatography to develope a new technology of stimutaneous extraction of three enzyme from pancreatin. We optimized the technology by studying the methods of purification and assured the technology as: The crude extraction from the dissolution of Pancreatin is directly absorbed on the DEAE gelose fast flow columnEquilibrating buffer is 0.01mol/L NaoAc-HoAc buffer(pH4.5; eluting buffer is 0.2~0.35mol/LNaCl in 0.01mol/LNaoAc-HoAc buffer (pH4.5), and then be eluted by two steps to acquire the peak of kallikrein.The solution which can"t be adsorbed by DEAE gelose fast flow column is adsorbed on affinity chromatographic column Equilibrating buffer is 0.01mol/LTris-HCl buffer(pH7.5, eluting buffer is 0.5mol/LNaCl in 0.01mol/Ltris-HCl buffer(pH7.5)and then be eluted by one step to acquire the peak of trypsin.The solution which can"t be adsorbed by is pretreated with 30%~80%(NH_4)_2SO_4 fractional precipitation, the deposition of the precipitation is dissolved to beabsorbed on phenyl gelose fast flow columnhydrophobic interaction chromatography condition is Equilibrating buffer is lmol/L(NH_4_2SO_4 in 0.01mol/LNaoAc-HoAc buffer(pH4.5), eluting buffer is 0~0.6mol/L(NH_4)_2SO_4 in 0.01mol/LNaoAc-HoAc buffer (pH4.5) and then be eluted by two steps to acquire the peak of chymotrypsin.

本研究考察了各种纯化方法,将离子交换层析、亲和层析和疏水层析三种分离纯化法相结合,建立了肽释放酶、胰蛋白酶和糜蛋白酶三酶的联产工艺:胰酶用pH4.5醋酸缓冲溶液提取后,粗提液直接上DEAE-琼脂糖快胶柱吸附平衡缓冲液:0.01mol/LNaoAc-HoAc缓冲液(pH4.5,洗脱缓冲液:0.01mol/LNaoAc-HoAc缓冲液(pH4.5)含0.2~0.35mol/LNaCl分两步洗脱,收集肽释放酶的洗脱峰;DEAE-琼脂糖快胶的未吸附液上亲和层析柱分批吸附平衡缓冲液:0.01mol/LTris-HCl缓冲液(pH7.5,洗脱液:0.5mol/LNaCl溶液,一次洗脱,收集胰蛋白酶洗脱峰;最后,亲和层析未吸附液用30%~80%硫酸铵分级盐析处理,沉淀溶解后用上苯基—琼脂糖快胶吸附平衡缓冲液:0.01mol/LNaAc-HAc缓冲液(pH4.5含1mol/L(NH_4)_2SO_4,洗脱缓冲液:0.01mol/LNaAc-HAc缓冲液(pH4.5)含0~0.6mol/L(NH_4)_2SO_4,分两步洗脱,收集糜蛋白酶的洗脱峰。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。