高压的

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。

The influence of high temperature and high pressure on foaming agent's properties in opened and closed system, and influence of the change of foaming agent's properties on foaming capacity and foam stabilizing capacity are also studied. The multiple regression theory is used to establish the quantitative characteristic functions of foaming agent versus temperature and pressure. Based on the Gibbs Principle, the quantitative characterization is carried out on relation of foam system's free energy versus its surface tension, surface area and concentration, and the analysis of energy concluded that the disintegration of the foam is inconvertible. At the same time, the influence of change of foam's shape and structure on distribution of reservoir temperature and pressure is qualitatively described, and the coupling mechanism between temperature field, pressure field and chemical field is systematically expounded.

同时，研究了不封闭体系、封闭体系下高温、高压对发泡剂性质的影响，以及发泡剂性质的改变对其发泡性能、稳泡性能的影响；采用泡沫实验的相关结果，运用多元回归理论，建立温度、压力与发泡剂浓度的定量表征函数；基于Gibbs原理，对高温、高压下泡沫体系的自由能与其表面张力、体系中液体的表面积以及浓度关系进行定量化的表征研究，从能量的角度得出了泡沫衰变过程具有不可逆性；同时定性地描述了泡沫形态、结构的变化对油藏温度和压力分布的影响，系统地阐述了温度场、压力场、化学场间的耦合作用机理。

This invention relates to a cascade multiple zero-type matrix rectifier, in which, a general input filter is connected between a net and a step-down transformer to get sine-wave input current, the step-down transformer includes n secondary windings with Yn spliced mid lines, the phase of all the three-phase windings is the same, the rectifier array is arrayed in a 1 row x n lines by n zero-matrix rectifier units, each line of which is connected with the seconday winding of the step-down transfornmer, and the outputs of the rectifier units are serial orderly to form a DC output, the general controller is responsible for regulating work of the entire system and connected with the branch controllers by signal cables to control the work of the rectifier units in the array.

本发明涉及一种级联多重化零式矩阵整流器，总输入滤波器连接在电网与降压变压器之间，滤波得到正弦波形的输入电流，降压变压器有n个Yn接带中性线的次级绕组，所有三相绕组相位相同，整流器阵列由n个零式矩阵整流器单元排成1列×n行的阵列，阵列中每一行与降压变压器的一个次级绕组对应连接，阵列中整流器单元的输出依次串联，形成一路直流输出，总控制器负责控制调节整个系统的工作，并通过信号电缆与各个分控制器联络，控制整流器阵列中每个整流器单元的工作。本发明由低压小功率的变换器串联得到幅值可调的高压直流电源，同时在电网侧得到位移为零的输入电流，具有网侧四象限运行能力等优点，适用于中高压直流供电领域。

The choice of the transformer includes: Main transformer use the main technique in number, capacity, model number...etc. in set data of the transformer to really settle; The electricity lord connected the line to introduce primarily the electricity lord connects the linear importance, design according to, the basic request, every kind of merit and shortcoming and lords that connect the line form connects the linear choosing more, the lord that combine to establish the in keeping with my plant the request connects the line; The short-circuit galvanometer is regarded as the most important link, this thesis introduced the calculating purpose in short-circuit electric current, assumption term, general provision, the calculation, network transformation of a parameter detailed, and each calculation etc. knowledge that short circuit order; The choice of the high pressure electricity equipments includes the mother line, high pressure breaks the road machine and insulate the switch, electric current to feels with each other the machine, electric voltage feels with each other the choice principle of the machine, high pressure switch cabinet with request, and proceed to these equipments the school check with the related introduction in product.

变压器的选择包括：主变压器的台数、容量、型号等主要技术数据的确定；电气主接线主要介绍了电气主接线的重要性、设计依据、基本要求、各种接线形式的优缺点以及主接线的比较选择，并制定了适合要求的主接线；短路电流计算是最重要的环节，本论文详细的介绍了短路电流计算的目的、假定条件、一般规定、元件参数的计算、网络变换、以及各短路点的计算等知识；高压电气设备的选择包括母线、高压断路器、隔离开关、电流互感器、电压互感器的选择原则和要求，并对这些设备进行校验和产品相关介绍。

However, relating to investigate the modes, courses and characteristics of the orogenetic process in Paleozoic and after orogenetic process, the cognitive divergence have still occurred.

通过对新疆北东部地区不同构造区带构造作用的方式、过程和特点的研究，确定：①南天山榆树沟高压麻粒岩地体的正变质原岩是一个基本完整的蛇绿岩套，其经历了俯冲至下地壳的高压麻粒岩相、构造抬升至深地壳麻粒岩相以及快速构造折返至角闪岩相的变质过程，代表了南天山洋壳俯冲、变质、随后折返的过程，并首次确定了变质过程的PTt轨迹；②奥陶纪末期中天山北缘发生洋盆俯冲、地体增生作用，此时萨日达拉地区处于岛弧活动带；中石炭世晚期中天山小型洋盆关闭，准噶尔地块与伊犁—中天山板块斜向对接随后发生脆韧性质近水平高温低速右行走滑剪切；③根据巴音沟地区不构成蛇绿岩套有效成分的硅质岩具有与活动大陆边缘密切相关的地球化学特征以及洋中脊玄武岩显示其岩浆源区受到消减带流体交代作用的影响，结合区域地质资料，首次提出巴音沟蛇绿岩带所代表的洋盆古构造环境为弧后盆地，并于早石炭世至中石炭世末期间，经历了扩张、收缩和闭合过程；④首次在克拉麦里蛇绿混杂岩带中分解出具有N-MORB、T-MORB与OIB三种不同类型的火山岩岩石组合，反映了洋盆俯冲

Common transparent quartz tube SiO2 more than 99.9% purity, geometry, chemical stability, thermal stability, resistance to thermal denaturation and anti-crystallization properties of the fine, optical transmittance above 93%; from hydroxyl in hydroxyl tube below 10ppm, after vacuum from hydroxyl, hydroxy-up to 5ppm below apply to high-pressure mercury lamp, sodium lamp, metal halide lamp, such as low-hydroxy products; white pipe, used mainly for heating tube, heating tube, far infrared control the manufacture, milky quartz pearl quartz tube possession of new technology, the management side as if the surface of pearls, all aspects of performance than ordinary white tube better; filter tube to filter out ultraviolet UV band in the harmful wavelengths of 190-320nm ultraviolet light source applied to environmental protection manufacturing; no ozone UV filter tube and pipe the contrary, through the ultraviolet wavelength around 253.7nm, there is no ozone UV lamp main material, widely used in medical equipment, water treatment, food hygiene, such as sterilization; quartz casing diameter 8-120mm in between, has a single opening, double opening round, flat-top shape and widen the mouth of necking, flanging, sanding and other processing, high temperature resistance, corrosion resistance, good light transmission and moisture-proof, explosion-proof characteristics such as widely used in aquarium thermostat, disinfection equipment, heating pipes, water treatment, metal halide lamp, such as product manufacturing and environmental protection, health, chemical and other fields; quartz Clamshell specifications 8-180mm, the shape according to the customer requirements, the bubble shell can take capillary has to carry out the exhaust, high temperature, light transmission is good, mainly for JC, JD, H1-H7, the stage lights and high-pressure mercury lamp, sodium lamp, metal halide lamp, such as product manufacturing; quartz water jacket mainly used in printing and packaging processing industry ---- UV light-curing, UV light curing is a very reliable and can be used to replace hot air dryers and other drying technique of curing technology, which in the printing and packaging of the processing industry has been widely.

普通透明石英管SiO2纯度达99.9%以上，几何尺寸、化学稳定性、热稳定性、抗热变性和抗析晶性能优良，光学透过率达93%以上；脱羟管羟基在10ppm以下，经过真空脱羟，羟基可达5ppm以下，适用于高压汞灯、钠灯、金卤灯等低羟基产品；乳白管，主要用于发热管、加热管、远红外管的制造，珠光石英管乳白石英管之新工艺，管面好象珍珠的表面，各方面性能比普通乳白管更优；滤紫外线管能够滤除紫外光谱波段中对人体有害的190-320nm波长的紫外线，适用于环保光源的制造；无臭氧管与滤紫外线管相反，可透过253.7nm左右波长的紫外线，是无臭氧紫外线杀菌灯的主要材料，广泛用于医疗器械、水处理、食品卫生等杀菌；石英套管直径范围在8-120mm之间，有单开口、双开口、圆头、平头等外形和扩口、缩口、翻边、磨砂等加工，具有耐高温、耐腐蚀、透光性好及防潮、防爆等特点，广泛使用于水族恒温器、消毒设备、加热管、水处理、金卤灯等产品的制造和环保、卫生、化工等领域；石英泡壳规格Φ8-180mm，形状根据客户要求，泡壳上可以接有毛细管，可进行排气，耐高温，透光性好，主要用于JC、JD、H1-H7、舞台灯和高压汞灯、钠灯、金卤灯等产品的制造；石英水套主要用于印刷和包装加工工业---- UV光固化， UV光固化是一种十分可靠的、可取代热空气干燥机和其他干燥技术的固化技术，它在印刷和包装加工工业已经得到广泛应用。

Our company has independent intellectual property rights are the production of high voltage current-limiting fuse electrical companies, more standards, more professional, better, more intimate, down-to-earth every process, every element of our reliable, fault-free, the company produces the "; SkyTeam "brand high voltage current-limiting fuse is your ideal choice, the following are 35KV transmission and distribution equipment essential accessory products, with the load switch, contactor with the use of expensive alternatives are the ideal circuit breaker products, can greatly reduce the cost of substation.

本公司是生产具有独立知识产权的高压限流熔断器的电器公司，更标准、更专业、更完善、更贴心，每一过程都扎实，每一环节都可靠，无纰漏，本公司生产的&天合&牌高压限流熔断器是你理想的选择，是35KV以下输配电设备必不可少的配套产品，其与负荷开关、接触器配合使用，是替代价格昂贵的断路器的理想产品，可大大降低变电站的费用。

This pole plate in this invention consists of he two piece or much more than two piece of the collection dust grid plate that everyone is in parallel, the alternation of the corona wire is between the two adjacent collection dust grid plate, the anode and the cathode of the high voltage generator connect respectively with the corona wire and the pole plate, the inner frame and the outer frame in this invention are oblong, the collection dust cell in this invention fits in the air inlet of the interior one of the air condition, it is fitted in the air inlet of the air condition engine used the fastening piece, the pole plate in this invention is make up of the conductive plastics.

一种微尘处理器，具有高压发生器及集尘单元两部分构成，其中集尘单元为线板式放电结构，其特征是：所述集尘单元主要部件有电晕线、极板和固定电晕线的外边框和固定极板的内边框，所述极板由两条或两条以上相互平行的集尘栅板构成，电晕线间隔位于相邻的两块集尘栅板之间，高压发生器的正、负两极分别与电晕线和极板相连接，所述内边框和外边框为长方形，所述的集尘单元安装在空调机室内单元的进风口处，用紧固件固定在空调机进风口上，所述的极板采用导电塑料制成。

Large air separation plant 40000m3/h, This plant adopts molecular sieve system to adsorb CO2, C2H2, moisture and CnHm in air to pre-purify air, by use of air booster compressor, to pressurize some of purified feed air by two sections, pressurized air to warm up high pressure liquid oxygen in high pressure coil heat exchanger to ambient temperature and delivere out off cold box to coal gasification, some pressurizrd air by first section is drawn from middle part of coil heat exchanger and expanded in medium pressure expander then led into lower column, other part of pressurized air by second section is drawn from cold end of coil heat exchanger and led into lower column after throttling, un-pressurized feed air is cooled by return gas in plate fin heat exchanger and led into lower column.

产品描述：采用常温分子筛空气预净化系统吸附空气中的CO2、C2H2、水份和一些碳氢化合物，使用单独的空气增压压缩机将部分净化后的原料空气分为两段增压，增压后的空气在高压绕管式换热器中将经液氧泵加压的高压液氧汽化并复热至常温送出冷箱直接供煤气化工序使用，第一段增压后的空气，部分从绕管式换热器中部抽出经电机制动的中压透平膨胀机膨胀后送入下塔，另一部分经第二段增压后从绕管换热器的冷端抽出节流后送入下塔，未经增压的原料空气在板翅式换热器中被低压返流气体冷却后进入下塔。

R12 on the ozone layer due to the destruction of the requirements of the developed countries for environmental protection from 1996 to start using refrigerant R134a Automotive Air-conditioning and the construction of air-conditioning at home in a similar, it is often installed in the compressor engine, and with a belt drive, the condenser installed in the car in front of the radiator, and evaporator in the car inside, and work out from the evaporator of low pressure gaseous refrigerant flows through a high-pressure high-temperature gas compressor After cooling condenser cooling tube cooling into the low-temperature high-pressure liquid, through the desiccant dryers and storage of buffer, and then to a more stable flow of pressure and flow expansion valve, the final expenditure and the flow of relief evaporator.

由于R12对大气臭氧层的破坏，出于环保的要求发达国家从1996年开始改用R134a做制冷剂汽车空调的构造和家用的分体空调类似，它的压缩机往往是安装在发动机上，并用皮带驱动，冷凝器安装在汽车散热器的前方，而蒸发器在车里面，工作时从蒸发器出来的低压气态致冷剂流经压缩机变成高压高温气体，经过冷凝器散热管降温冷却变成高压低温的液体，再经过贮液干燥器除湿与缓冲，然后以较稳定的压力和流量流向膨胀阀，经节流和降压最后流向蒸发器。

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。