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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。

Medium the student of job school, enter school a score widespread and low, and not even, a nice bit of person have already lost study interest, the spirit be in low spirits, not intentional study.

中职学校的学生，入学分数普遍偏低，而且参差不齐，相当多的人已经丧失学习兴趣，精神萎靡不振，无心学习。

So the ultra-low frequency absolute vibration detection is a difficult problem in engineering measurement field. In this paper, the ""high-frequency-suppression and low-frequency-lifting"" compensation method was presented based on the analysis of the inertial sensor with "" mkc "" structure.

本文通过对mkc结构惯性式传感器机理的分析，提出了一种对传感器传递函数进行"抑高扬低"的补偿方法，并对此补偿网络和系统幅频特性进行了优化，较好地克服了惯性式传感器低频特性差的固有缺陷，实现了传感器的微型化。

Wavelet modulus maxima with high frequency and low frequency coefficients were obtained firstly through multiscale decomposition of well logging data;then important wavelet coefficients were chosen according to the fusion principle where high frequency coefficients were taken as maximal absolute values and low frequency coefficients were selected by edge detection principle;finally alternating projection algorithm was applied to reconstruct the fusion curve.

首先对原始测井曲线进行多尺度分解，得到不同尺度下的小波低频系数和高频模极大值；然后选用高频系数取绝对值极大、低频系数采用边缘法的融合规则，选取重要的小波系数；最后利用交替投影算法重构融合曲线。

The objectives of this research were students on third grade in junior high school whose study achievements were low. This research defined learning attitude as:"the attitude of learning contents","the attitude toward the teacher","the attitude toward school","the attitude toward selfhood". The research last one year by observing in teaching, using teacher's self-examination, students' learning papers, learning feeling questionary, and interview. The result were that thematic teaching improved the learning attitude of low study achievements students, and the degree of acceptancy of those students was high.

本研究以国中三年级学业成就较差的一个班级学生为研究对象，将学习态度界定为「对学习内容的态度」、「对教师的态度」、「对同侪的态度」、「对学校的态度」、「对自我的态度」五方面，研究历经一年完成；利用教学中的观察、教师反省日志、学生学习资料、学习感受问卷和访谈得知，运用主题式教学法可改善低学业成就学生的学习态度，且低学业成就学生对主题式教学活动的接受度也相当高。

It can solve such problems in traditional systems as great intensity of labor force, low test efficiency, bad environment and low precision, and it can reduce accident rate and maintenance cost of oil pump units.

该系统可以解决传统输油泵机组测试系统中操作人员工作强度大、测试效率低、环境差、测量精度低等问题，降低输油泵机组的事故发生率和维护成本。

The results showed that: low molecular weight aromatic, such as naphthalene, fluorene, acenaphthene, locates at low levels, while the high molecular weight aromatic locates at high levels, such as benzo perylene, indene [1,2,3-cd] pyrene, benzo fluoranthene and benzo pyrene, of which , the concentration of fluoranthene is highest, reaching about 19%.

结果表明：萘、芴、苊等低分子量芳烃的含量相对较低；苯并苝、茚并[1，2，3-cd]芘、苯并荧蒽、苯并芘等高分子量芳烃的含量相对较高；含量最高的单体为荧蒽，占待检的16种PAHs的19%以上。

Numerically, Limacina trochiformis was the main dominant specis in spring, attributed to its low temperature adaptation. Atlanta peroni was the dominant species in summer and Creseis acicula was the dominant species in autumn due to their adaptation to relatively high temperature. Agadina stimpsoniji was the dominant species in winter, adapted to low temperature.

马蹄螔螺适温较低，是春季主要优势种；明螺作为暖水种，是夏季主要的优势种；秋季主要优势种为尖笔帽螺，适应于较高的水温；强卷螺适温较低，是冬季的主要优势种。

Simulation results show that the proposed method is effective and adaptable for low and very low bit rate applications.

仿真结果表明，该方法适用于低码率及甚低码率的视频应用。

One category is the traditional leader in the domestic national brand and other parts have a regional market based on two or three brands of toothpaste products (blue six Hartridge, two needles, etc.), on the one hand, enhance the brand image, on the other hand, for the operation of the reality of costs and profits necessary, the product began from the low-end to high-end depth in advance, so the price system from low to high showed a strong trend of development, with a view to establish a brand image for high-end market, cut the cake.

一类是在国内民族品牌和其他地区的传统领导者有一个区域市场的两三个品牌的牙膏产品的（蓝色6哈特里奇，两针等），一方面，提高品牌形象，在另一方面，为了在必要的成本和利润的实际操作，产品开始从低端到高端的深入推进，因此，由低到高价格体系表现出强劲的发展势头，以期建立高端市场的品牌形象，切蛋糕。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。