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A low minimum operating supply voltage of 2.9V, and a low shutdown quiescent current of less than 1μA, make the LT3757 ideally suited for battery-operated systems.The LT3757 features soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit.The device is available in a small 10-lead DFN (3mmx 3mm) or MSOP package.

本文介绍了LT3757主要特性，方框图以及典型应用电路，包括高效升压转换器， 3.3V输入，5V/10A输出升压转换器， 8-16V输入24V/2A输出升压转换器，高压反激电源电路，以及5.5V-36V输入，12V/2A输出SEPIC转换器和非绝缘的反相SLIC电源。

So a novel driving scheme for Synchronous Rectification in CCM flyback converter is proposed in this paper; and it can be applied to the flyback converter in the CCM operation and wide input voltage range application. The new driving scheme possesses simple、cost-effective and high efficiency property.

本文深入地分析同步整流反激变换器稳态工作模式，结合峰值电流控制策略，应用状态空间平均方法，建立反激变换器的小信号模型；并依据建立的小信号模型，对控制电路进行优化设计；计算机仿真和实验验证理论预期。

METHODS:U937 cells were labeled with ［3H］ thymidine in the culture medium, test reagents were added into the cell suspension in 24-well plates. The counts*min-1 were counted in a liquid scintillation counter.

［3H］-TdR标记的U937细胞培养于24孔板，在高分子激肽原，激肽释放酶(kallikrein，KK)，因子Ⅻ和纤溶酶原的作用下，观察U937细胞的粘附情况。

In fact,it has been reported that mitochondrion sHSP ,cytosolic sHSP and ER sHSP are related to the ability of cold-tolerance.

近几年的研究发现热激蛋白特别是小分子热激蛋白，除可以提高细胞的抗热能力外，还和细胞的耐寒性有关。

Methods rats were forced to swim in cold water daily for 9 days,behaviors in the open-field test,serum noradrenalin,dopamine and 5-hydroxytryptamice,and ascorbic acid in adreanal gland were determined.

采用强制冷水游泳模拟慢性疲劳发病过程的动物模型，从应激角度观察应激导致动物疲劳时，其大体行为及神经内分泌系统的变化和二十八烷醇对该变化的影响。

It includes a Shockwave 3D previewer, so you can prepare your content, export it, and view how your results will look in Shockwave 3D without ever leaving Maya.

它包括一个激波 3D立体事先查看，因此你能准备你的内容，输出它，和视野你的结果将会顺便探访激波 3D立体的方式没有曾经离开玛雅人。

We calculated the input power of a SiO〓 glass fiber at which the NBNEs can no longer be neglected and discussed the influence of this non-boson effect on intense light Raman scatterings in optical fibers.

本文计算了在怎样强的输入功率下，SiO〓光纤中激子非玻色性不再可以忽略，并讨论了激子非玻色性对光纤中强光拉曼散射的影响。

Influence of the antioxidants vitamin E and idebenone on retinal cell injury mediated by chemical ischemia, hypoglycemia, or oxidative stressRego A, SantosM, Oliveira C.. Free Radic. Biol. Med, 1999, 26: 1405 - 1417Abstract:A role for the antioxidants vitamin E and idebenone in decreasing retinal cell injury, after metabolic inhibition induced by chemical ischemia and hypoglycemia, was investigated and compared with oxidative stress conditions.

对由于化学贫血与低血糖所引起的代谢抑制后，抗氧化剂维生素E与艾地苯醌视网膜细胞受损所引起的作用进行了研究，同时并与氧化应激情况进行了对比，对氧化物维生素E(20 microM)和艾地苯醌(10 microM)进行先期培养可以在氧化应激或低血糖后防止视网膜细胞受损，而对上述二种抗氧化剂给予预先培养后带来的保护作用则有所减低。

Mu YM,Takayanagi R,Imasaki K,Ohe K,Ikuyama S,Yanase T,Nawata H.Low level of glucocorticoid receptor mes-senger ribonucleic acid in pituiary adenomas manifesting Cushing's disease with resistance to a high dose-dexamethasone suppression test ［J］.

国内外研究已表明银屑病属于心身疾病范畴［1，2］，劳累、精神紧张等应激情况在银屑病诱发及加重中起着重要的作用。1998年，徐仁宝［3］观察到应激时GR不但数量减少，而且与GC的亲和力也下降。

The difference scheme of Godunov is an available method to calculate complex wave flow by the mean of shock capturing.

匀直管中，激波运行至封闭端发生反射，反射激波反向运动，致使排出气温度升高。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。