查询词典 high-class

Results The tinnitus frequency, severity of subjective tinnitus, audiogram types and some items of function test above hearing threshold were significantly different in the five groups (P.05). Specific features of pure-tone test were found in the five groups: tinnitus frequency was low, whole- frequency hearing threshold high, audiogram even, short increment sensitivity index at 1 kHz high and tone decline at 4 kHz low in the syndrome of invasion of wind-heat; tinnitus frequency was high, high-frequency hearing loss common, audiogram abruptly descending, SISI and TD at 4 kHz high in the syndrome of liver-fire up-stirring; subjective tinnitus was loud, audiogram abruptly descending or gradually descending, SISI and 7W at 4 kHz low in the syndrome of stagnation of phlegm-fire; tinnitus frequency was high, subjective tinnitus low, audiogram markedly descending or hill-like, SISI and TD at 4 kHz high in the syndrome of kidney-essence deficiency; average hearing loss was less, audiogram irregular but abruptly descending or notched in most cases, SISI at 4 kHz low in the syndrome of weakness of spleen-stomach.

结果］耳鸣频率、自觉耳鸣程度、听力图类型及部分阈上功能测试指标在各证型间具有显著性差异(P.05)，这些指标在不同的证型中表现出不同的特点：风热侵袭型的耳鸣频率较低，全频听阈升高，听力图多为平坦型，短增量敏感指数得分在1kHz较高，而4kHz音衰值较低；肝火上扰型的耳鸣频率较高，听力损失以高频为主，听力图多为陡降型，4kHz SISI得分及TD值均较高；痰火郁结型的自觉耳鸣响度较大，听力图以陡降型或缓降型为主，4kHz SISI得分及TD值均较低；肾精亏损型的耳鸣频率较高，而自觉耳鸣响度较低，听力图以显降型或山型为主，4kHz SISI得分及TD值均较高；脾胃虚弱型的平均听力损失较小，听力图无一定规律性，但以陡降型或切迹型为主，4kHz SISI得分较低。

Especially since 1994, Xi'an High-tech Zone of the composite indicator has been ranked 53 in the forefront of state-level high-tech zones has been named National Advanced High-tech Zone; 2001, Ministry of Science and Technology in Xi'an High-tech Zone has been classified as "15" During construction of the five countries, one of the Model High-tech Zone, Xi'an and was elected as members of the public votes "Ten twenty-first century Xi'an historic event," one; December 2002, Xi'an High-tech Zone by United Nations Industrial Development Organization study finds for six,"China's most dynamic cities and regions", one of …… After more than a decade of construction and development, Xi'an High-tech Zone in western China to become the most popular, the environment the best, one of the fastest growing region, and Hailed as "the ninth Guanzhong King."

特别是自1994年以来，西安高新区的综合指标一直位居53的前列国家一级高新区已被命名为全国先进高新区； 2001年，科学和技术部在西安一个高新区已被列为"十五"期间建设的五个国家之一，示范高新区，西安，当选为市民投票"十大二十一世纪西安历史活动，"一个； 2002年12月，西安高新技术产业开发区由联合国工业发展组织研究发现6，"中国最具活力的城市和地区"之一……经过十多年的建设和发展，西安高新区在西部成为中国最流行的，环境是最好的，增长最快的一个地区，被誉为"关中第九景"。

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。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。