查询词典 high-tech

LED High Power DownLight,LED Hight Power Track Light,LED High Power Ceiling Light,LED high Power Wall Lamp,LED Hight Power Grid Lamp,LED Flood Light,LED High Power Wall Washing Light,LED High Power Under Ground Light,LED High Power Under Water Light,LED Table Lamp,LED High Power Street Light,All Kinds of LED Light.

成功研制生产的大功率LED筒灯、LED泛光灯、LED吸顶灯、LED豆胆灯、LED横灯等产品，因其可靠的质量和性能远销到欧洲、北美洲、及亚洲国家。公司产品全面通过CE认证，在设计、生产、和服务过程中严格实施标准化管理和控制。

In recent years, SiC FET power transistor and GaN high electron movability power transistor represent the third generation semiconductor-wide bandgap semiconductor power devices, have advantages of high breakdown voltage, high power density, as well as high output power, high operation efficiency, high operation frequency, wide instant aneous bandwidth, operation in high temperature environment and strong ability of resisting radiation.

近年来以SiC场效应功率晶体管和GaN高电子迁移率功率晶体管为代表的第三代半导体－宽禁带半导体功率器件具有击穿电压高、功率密度高、输出功率高、工作效率高、工作频率高、瞬时带宽宽、适合在高温环境下工作和抗辐射能力强等优点。

Data chart: The acrobatics in sky of high coach plane performs Chinese L-15 falcon data chart: Falcon supersonic speed teachs machine takeoff data high the graph: Falcon supersonic speed teachs data of aircraft engine abdomen high the graph: Falcon supersonic speed teachs high opportunity is great greet horny takeoff L-15 " falcon " teach high machine it is the high-powered coach opportunity that in recent years our country own research and development creates, also be at the same time one " export " train plane, depend on superior performance, this one L-15 " falcon " teach high machine the French Paris boat that ends in not long ago is exhibited on can saying is cut a dash.

L-15&猎鹰&高教机是近年来我国自主研发制造的高性能教练机，同时也是一款&外销型&教练机，凭借优异的性能，这一款L-15&猎鹰&高教机在不久前结束的法国巴黎航展上可以说是大出风头。

Ceramic bearings can produce oxidation-ho, silicon carbide, silicon nitride and so on, diameter from 3mm-50mm, precision Machinable P0, P6, P5 level; its performance characteristics are: high temperature, oil-free self-lubricating, acid, alkali and salt corrosion , wear resistance, low noise, insulating diamagnetic, since high-speed operation; metal nano-ceramic bearing its production process for a new generation of high content of nano-particles in the heat and pressure infiltration of metal surface is activated to fill the cracks and pits the metal so that 3-5 micron metal surface is more smooth solid surface, greatly reduce the friction, improve Chennai base metals, and greatly increased the life span of bearings, and its characteristics are: long life (as an ordinary stainless steel bearings 2 -- 10-fold), low noise (as an ordinary stainless steel bearings, 70%), wear-resisting, acid, alkali, salt corrosion, high temperature, load large; ceramic bearing and metal nano-ceramic bearing design and development to meet the needs of the market for high-speed, low - noise, high load, the demand for corrosion-resistant; Machinery Production Department to produce aircraft rod end joint bearing, linear guide bearings, the fuel tank of earrings, plastic bearing, non-standard side bearing components, glass door hardware, such as high-precision control products; and provide CNC machining.

陶瓷轴承可生产氧化镐、碳化硅、氮化硅等，内径从3mm-50mm，精度可加工P0、P6、P5级；其性能特点为：耐高温、无油自润滑、耐酸、碱、盐腐蚀、耐磨、低噪音、绝缘抗磁、起高速运转；金属纳米陶瓷轴承其生产工艺为新一代的高含量纳米级微粒在热和压力的作用下被激活渗入金属表面，填补金属缝隙和凹坑，使金属表面3-5微米表面更光滑坚固，大大降低其摩擦力，提高金属的奈酸碱性，并大大提高了轴承的寿命，其特性为：长寿命（为普通不锈钢轴承的2-10倍）、低噪音（为普通不锈钢轴承的70%）、耐磨、耐酸、碱、盐腐蚀、耐高温、负载大；陶瓷轴承与金属纳米陶瓷轴承的设计开发以满足市场对高转速、低噪音、高负载、耐腐蚀的需求；机械生产部以生产机杆端关节轴承、直线导轨轴承、油缸耳环、塑料轴承、非标端轴承零部件、玻璃门控五金等高精度产品；并对外提供数控加工。

Is a company specializing in the production of electricity of standard parts, steel standard parts, automobile standard parts, standard parts pipeline, railway standard parts, the new GB standard parts, building standard parts, stainless steel fasteners, high-precision standard parts, high precision fasteners, non-standard fasteners, non-standard fasteners, standard 4.8, 8.8 standard parts, standard parts 10.9, 12.9 standard, GB standard, the new GB standard, British standard standard parts , American standard standard parts, standard parts de superscript, subscript day standard parts, construction fasteners, building hardware, light bolt, square head bolts, hexagon bolt, hexagon bolt big, hot hit bolts, steel bolts, GB30-76 bolts, 5781 Bolt, Bolt 5782, Bolt 5783, Bolt 5784, 5785 bolts, steel structure with high strength bolts connecting deputy, steel torsional shear type high strength bolts used to connect deputy, steel structure with high strength bolts connecting deputy, high-strength steel large hexagon head bolts to connect the Deputy, high strength bolts, tower bolts, rail bolt, wheel bolts, wheel screws, carriage bolts, head bolts, stainless steel bolts, screws Terrier reduction, four wire, to the foot silk, silk double-headed, square head silk, bucket-type wire, fish wire, oval wire, full-profile wire, hook the first wire, the back wire, live wire section, expansion of silk, silk expansion implosion, implosion-type expansion of silk, expansion bolts, railway screw, nut , self-locking nut, hexagonal nut, locknut, galvanized nuts, weld screws, arc stud welding with welding cylinder head screws, weld stud, weld nails without a head, cylinder head welding nails, pin, fastener, standard parts, Yamagata card, u-type cards, special bolts, special-shaped standard parts, special fasteners professional production enterprises.

河北冀南标准件有限公司是一家专业生产电力标准件，钢结构标准件，汽车标准件，管道标准件，铁路标准件，新国标标准件，建筑标准件，不锈钢标准件，高精度标准件，高精度紧固件，非标标准件，非标紧固件，4.8级标准件，8.8级标准件，10.9级标准件，12.9级标准件，国标标准件，新国标标准件，英标标准件，美标标准件，德标标准件，日标标准件，建筑扣件，建筑五金，光螺栓，方头螺栓，六角螺栓，大六角螺栓，热打螺栓，钢结构螺栓， GB30-76螺栓，5781螺栓，5782螺栓，5783螺栓，5784螺栓，5785螺栓，钢结构用高强度螺栓连接副，钢结构用扭剪型高强度螺栓连接副，钢结构用高强度螺栓连接副，钢结构用高强度大六角头螺栓连接副，高强度螺栓，铁塔螺栓，铁道螺栓，轮毂螺栓，轮毂螺丝，马车螺栓，沉头螺栓，不锈钢螺栓，缩梗螺丝，四角丝，地脚丝，双头丝，方头丝，斗型丝，鱼尾丝，鹅蛋丝，全纹丝，钩头丝，靠背丝，活节丝，膨胀丝，内爆膨胀丝，内爆式膨胀丝，膨胀螺栓，铁道螺钉，螺母，自锁螺母，六角螺母，防松螺母，镀锌螺母，焊钉，电弧螺柱焊用圆柱头焊钉，焊接螺柱，无头焊钉，圆柱头焊钉，销轴，紧固件，标准件，山形卡，u型卡，异型螺栓，异型标准件，异型紧固件的专业生产企业。

A design and implementation method of the high speed modulation system, which adopted the new techniques of the FPGA and DAC based communication system,is presented in this paper. The effect of the key techniques of this system, such as the high speed digital signal processing for modulation, high speed based-band signal conversion, wide-band modulation, carrier suppression, high frequency and high precision system clock generation, is analyzed, and the solutions and performance analysis is also given. Finally, a high speed modulation system for space applications is implemented, can be used for high speed data transmission with QPSK, 8PSK, QAM or other kinds of digital modulation.

本论文依据正交调制原理，采用基于FPGA和DAC的设计技术，提出了一种高速、灵活的调制系统的设计方法，重点分析了系统组成的调制编码映射、基带脉冲信号转换、信号滤波、调制、系统时钟产生等关键技术环节的影响，解决了高速调制信号处理、高速数据转换、宽带调制、载波抑制、高频率高精度系统时钟的产生等关键技术问题，完成了一种适用于空间应用的高传输速率、多进制数字调制方式和调制体制灵活的数据传输调制系统的设计与实现，可在硬件设计不变的情况下，实现QPSK、8PSK和16QAM等多种调制方式的高速数据传输，QPSK调制速率达到500Mbps。

Decades, the system does not always produce pipes, tiles, cement products and other traditional rod, but the development should be high (high-strength, high pressure) and large, new (new building materials and products) as a key to develop new products In detail: to develop high-strength prestressed concrete pile; apply to set up more than 110 kilovolt high voltage transmission lines and electrified railway lines, etc. Catenary large t m poles; application of new high-speed heavy rail with pre-stressed concrete sleeper; high-pressure , large-diameter prestressed concrete cylinder pipe; steel concrete and prestressed steel-concrete composite pipe; new type of reinforced concrete pipes, such as the mouth and socket bearing steel reinforced concrete pipes, square pipes, short-shaped pipes, common drains ; reinforced concrete inspection and; urban and rural construction using a variety of hollow interior wall panels and composite wall panels, concrete hollow block.

不能几十年一贯制生产管、瓦、杆等传统水泥制品，更应把发展高、大、新作为重点开发新产品，具体讲：大力发展预应力高强混凝土桩；适用于架设110 千伏以上高压输电线路和电气化铁路接触网线路等的大吨米电杆；适用高速重载铁路用的新型预应力混凝土轨枕；高压、大口径预应力钢筒混凝土管；钢板混凝土和预应力钢板混凝土复合管件；新型钢筋混凝土排水管，如钢承口和承插式钢筋混凝土排水管、方型渠、短形渠、共同渠；钢筋混凝土检查并；城乡建设用的各种空心内墙板和复合外墙板、混凝土空心砌块。

This paper analyzed the balance precision and grade of high speed grinding wheel and its effect on grinding performance analyzed. The unbalance causes of high and super high speed grinding wheel were discussed too. The evaluation and selection for the balance precision of high and super high speed grinding wheel were studied. Furthermore, the paper analyzed the principle and significance of dynamic balancing technology of high and super high grinding wheel.

对高速转子平衡精度和等级及其对磨削性能的影响进行了理论分析，并深入讨论了超高速砂轮系统的不平衡因素，研究了超高速砂轮系统平衡精度的评价与选择方法，分析讨论了盘形高速和超高速磨削砂轮动平衡技术的原理和意义。

The technique problems such as quick charging of high voltage capacitor, uniform discharge in high pressure large aperture zone, uniform flow of high pressure gas, and laser resonator, high energy pulse output and high repetition pulse output, were solved by applications of ultraviolet preionization, two-circuit series and parallel discharge structure of graphite Ernst electrode, folded resonator that embodies super-thin water-cooled non-deforming mirror, closed circle direct cooling system of double loop and high-voltage high-current switch power supply.

采用紫外预电离双路Ernst石墨电极串并联放电结构、超薄水冷不变形镜折叠腔、双回路直冷式封闭循环流动系统和高压大电流快脉冲开关电源等技术，解决了高功率高压电容充电、高气压大体积均匀辉光放电、高气压高速均匀流场、激光谐振腔和高脉冲能量、高重复频率脉冲激光输出等技术难题。

By the use of Circling cluster and Envlopment theory and flat surface sit-mark transformation theory, the chain wheel tooth equation of roller chain at high speed to match conjugage engagement is deduced.Establishing chain speed equation of roller chain at high speed,based on the analysis of the speed curves between roller chain at high speed and common roller chain,good drive of roller chain at high speed is verificated theoretically.By a example that move distance from transverse vibration between roller chain at high speed and common roller chain is contrasted,the accuracy of those theories that the paper brings up and higher functions of roller chain at high speed is proved.Finally, Establishing conjugage engagement line equation of roller chain at high speed and analyzing the complete engagement zone, the chain wheel tooth curve equation is studied at a higher degree. At the same time,the lack's place of the research result is pointed out.

依据高速滚子链设计要求与H_y-V_0齿形链的研究，阐述了滚子链传动实现准共轭啮合理论可能性；利用圆族包络法结合平面坐标变换理论推导出了满足共轭啮合的高速滚子链的链轮齿廓曲线；建立起高速滚子链链速方程，通过对高速滚子链与普通滚子链链速曲线的对比分析，从理论上验证了高速滚子链具有良好的传动性能；最后，建立起高速滚子链共轭啮合线方程，对其整个啮合区间进行了分析，进一步研究了链轮齿廓曲线方程，确定了主要参数的设计方法的问题，并同时指出了不足之处。

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。