双动的

The dual-band differential LNA use Inductive source degeneration structure, a matching network is used for the LNA to develop dual-band. The micro-mixer use a matching network shunt and parallel LC elements to develop wide-band matching. The biasing method reduces the"voltage headroom" difficulties inherent to the Gilbert cell, and the mixer linearity can be improved using this biasing method "Charge -Injection"by accurate adjustment of the input MOSFET operating point. The complementary VCO based on 2.5GHz, and tuning output buffer to approach 2GHz/5GHz dual-band for dual-band down-converter with MMIC technology.

其中双频差动低杂讯放大器，本电路用Inductive Source Degeneration 架构，在匹配网上设计，使低杂讯放大器工作在个频带上达成双频带的效果；CMOS 微混频器上采用LC串联、并联电路做匹配，达到宽频匹配的效果，并加入了"Charge-Injection"的方法来改善"voltage headroom"的问题，并同时提高线性度的表现；互补式压控振荡器以2.5GHz为基频的振荡器为出发点，透过电路的调整，以期达成2.5/5GHz的双频带需求，能够完整达成双频带接收机系统。

DeZurik Cylinder Actuators are available with double-acting pneumatic or hydraulic cylinders for on-off positioning service.

美国DeZurik公司可提供双动气动执行器或用于启闭定位应用的液动执行器。

Elderly patients with conservative treatment of femoral neck fracture in the bone unhealing rate, avascular necrosis rate and bed incidence of complications are very high, often need surgical treatment, Currently Artificial arthroplasty better able to load the early running, and significantly improved the quality of life. Orthopedist has been universally acknowledged, which was also hemiarthroplasty for and hip arthroplasty mainly, But these indications of operation and the pros and cons of surviving in numerous disputes, By comparing our double-action Hemiarthroplasty with total hip arthroplasty for femoral neck fracture in the elderly average operative time, The average blood transfusion, the average length of stay, average hospital charges, early complications, Harris score, Oxford hip score standards evaluation discussion bipola Femeral Head placement with total hip arthroplasty in the treatment of femoral neck fracture in the elderly: the advantages and disadvantages.

老年患者股骨颈骨折保守治疗的骨不愈合率、股骨头缺血坏死率及卧床并发症发生率很高，常需要行手术治疗，目前应用人工关节置换疗效较好，能早期负重行走，生活质量明显提高，已得到骨科医师的普遍认同，其中又以人工股骨头置换术和人工髋关节置换术为主，但这些术式的适应证及利弊尚存在诸多争议，我们通过比较双动人工股骨头置换与全髋关节置换治疗老年人股骨颈骨折的平均手术时间、平均输血量、平均住院时间、平均住院费用、早期并发症、Harris评分、牛津髋关节评分标准评价来探讨双动人工股骨头置换与全髋关节置换在老年人股骨颈骨折治疗中的优势与劣势。

Abstracts:Based on analysis on the press device of traditional single-action press, the BHF, which is an important parameter, can be regulated realtimely in deep drawing by the use of new hydraulic deep drawing equipment.

在分析单动压力机传统的压边装置的基础上，引入新型液压拉深装置可以实时调节拉深成形中的重要参量—压边力，并可同单动压力机一起替代双动压力机，进一步研究和应用新型液压拉深压边装置，可以为汽车、航空工业中板料加工工艺带来有益的变革。

My company's main products are: Y28 series of 4 double-action hydraulic machine (35 to 1,200 tons a variety of specifications); Y98 series of tide-hydraulic machine; Y32 dynamic of 4-under-pressure hydraulic machine; YDK series on the framework of shifting hydraulic machine (1500 Tons, 2,000 tons, such as for aluminum pressure cookers, Bu Zhanguo complex at the end of the framework of large-scale hydraulic machine); Y33 series on the transfer of 4 hydraulic machine; Y31 series of double-column single-action hydraulic machine; Y38 series of 4 inverted hydraulic machine; Y41 series of single arm Hydraulic press; Y73 series of vulcanized rubber products; YK-bending series of hydraulic machine; high-precision Lvyou cars and various hydraulic stations, fuel tanks, according to customer requirements and design, manufacture Gezhongfeibiao hydraulic machinery.

我公司主要产品有：Y28系列四柱双动液压机（35吨至1200吨多种规格）；Y98系列水涨形液压机；Y32四柱单动下压式液压机；YDK系列框架上移式液压机（1500吨、2000吨等用于铝压力锅，不粘锅复底的大型框架液压机）；Y33系列四柱上移式液压机；Y31系列双柱单动液压机；Y38系列四柱倒置式液压机；Y41系列单臂液压机；Y73系列橡胶制品硫化机；YK系列弯曲木液压机；高精细滤油车以及各种液压站、油缸等，并可根据客户要求设计、制造各种非标液压机械。

The purpose of opening the orifice was to sluice. The influence of fluctuating pressure upon the dam was another problem which was concerned by engineer. The paper analyzed Shuangkoudu masonry arch dam. The result indicated that the dam natural frequencies which consider the dam and the reservoir water interaction have great different from the preponderant frequencies of fluctuating pressure, the dam's first rank of vibration was far away from the high energy region of the fluctuating flow, so the sympathetic vibration would not take place.

坝身开设孔口主要目的是为了泄洪，泄洪时水流脉动压力对坝体结构动的影响是设计人员关心的另一课题，论文针对双口渡浆砌石拱坝进行了分析，研究结果表明：在考虑坝体一库水相互作用时坝体自振频率和水流脉动压力的优势频率相差较大，坝体的一阶振动远离脉动水流的高能量范围，二者不会发生共振。

The press are differ from tradition double drawing, single drawing, press side force does not offset to draw force.

本系列液压机不同于传统的双动、单动拉伸液压机，压边力不抵消拉伸力。

The presses used for reference machine type double-drawing presses arts and crafts, It adopt Hydraulic urns change new drawing Hydraulic precess. It special have double drawing quick as well as Hy draulic double –drawing press and speed adjustable.

本系列液压机是借鉴机械式双动拉伸液压机工艺，采用液压缸改进而成的新型拉伸液压机，具有机械双动拉伸机快速特性，又有液压双动拉伸机压力和速度可调的特性。

Currently has a four-post type, frame type, single column, such as horizontal structure, the production of generic products include hydraulic machine, single-action hydraulic sheet metal punching machine, double-acting hydraulic press sheet tensile, hydraulic head machines, metal extrusion hydraulic machine, a dedicated hydraulic motor manufacturing machines, automotive hydraulic press dedicated motorcycle parts, Rubber and Plastic Products hydraulic machines, hydraulic squeeze casting machine, hydraulic press powder products, calibration of hydraulic pressure capacity and the kinds of non-standard machine, hydraulic equipment and production lines, such as twenty series of more than more than 300 species, an annual production capacity of various types of hydraulic press 400 Product Units / 2600 tons of production capacity.

目前已形成四柱式、框架式、单柱式、卧式等各类结构形式，所生产产品包括通用液压机、单动薄板冲压液压机、双动薄板拉伸液压机、液压打头机、金属挤压液压机、电机制造类专用液压机、汽车摩托车零部件专用液压机、橡塑制品液压机、挤压铸造液压机、粉末制品液压机、校正压装机以及各种非标液压机、液压设备和生产流水线等二十余个系列三百多个品种，形成年产各类液压机产品400台／2600吨的生产能力。

In order to get the optimal solution of an inverse problem,we analyse systematically the double perturbation processing technique, the first order Bor...

为了得到反问题的最优解，文中系统地研究了层状介质中双摄动处理技术，以及层状介质中波场摄动的一阶 Born 近似解与理论重力异常摄动解。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐