双线的

By analyzing especially the principle of norland corporation xr-46 two-type x-ray bone density meter and the equipment's service cases, we discuss the importance of the medical instrument's calibration and maintenance.

本文介绍了常用骨密度仪的测量技术，对norland xr-46 双能x线骨密度仪的工作原理进行了分析，结合设备的维修案例，探讨了仪器校准质控和维护的重要性，给使用和维修人员提供故障处理的思路和方法。

Use standard wiring components regulated (patch panel, connectors, and information outlets, plugs, adapters, transmission devices, electrical circuit protection equipment and management support for the hardware), the use of unshielded twisted pair wiring with fiber-optic hybrid approach All modular combination of compression, in order to connect the terminal equipment for voice, data equipment, telecommunications equipment and switching equipment, and make the equipment and external communications network connected, integrated system for building weak links on the basis of information Use the opening to provide a reliable guarantee.

使用符合标准规范的布线部件(配线架、连接器、信息插座、插头、适配器、传输器件、电气保护设备和线路管理支持硬件)，采用非屏蔽双绞线与光纤混合布线方式，全部采用模块化组合压接、以连接大楼内的话音设备、数据设备、电子通讯设备和交换设备等，并能使这些设备与外部通讯网络相连接，为大厦弱电集成系统的信息基础链路的开通使用，提供可靠保障。

To conduct such research a new experimental apparatus was established.With this setup the two-photon excitation spectra of Barium and one-photonexcitation spectra of Strontium Rydberg atoms were recorded and identified.The Stark spectra of Strontium atoms showed the "l-mixing" and "n-mixing"features. By changing laser wavelength and external electric field strengthsimultaneously, the scaled-energy spectra of Strontium 〓 Rydberg atomsat constant scaled-energy ε=-3.00,-2.50 and -1.88 were recorded for thefirst time. The experimental spectra were Fourier transformed and yielded therecurrence spectra.

主要工作包括：建立了一套用于外电场原子光谱研究的原子束实验装置；获得了Ba原子的双光子、Sr原子的单光子零场激发谱，并对各谱线进行了标识；进行了Sr原子电场Stark效应研究，观察到了低场时能级角量子数"l"混合区及高场时主量子数"n"混合区的存在；首次获得了Sr原子在标度能量ε=-3.00、-2.50及-1.88时〓高Rydberg态电场标度能谱及傅立叶变换后的电子回归谱。

Company existing staff 120 people, an annual production capacity of 500,000 sets, with advanced detection, testing and special equipment, is equipped with electronic assembly production lines, instrumentation lines, shear pin machine, dual wave soldering machine, reflow soldering machine, as well as supporting the necessary machining equipment, electronic products have a strong general-purpose processing, and can meet the general requirements of production and processing of electronic products.

公司现有职工120人，年生产能力50万台套，具有先进的检测、试验专用设备，配有电子装配生产线、插装线、剪脚机、双波峰焊机、回流焊机以及配套必要的机加工设备，设备有较强的电子产品加工的通用性，能满足一般电子产品生产加工要求。

Results Same as hyaline cartilage, the calcified cartilage was stained light flavo-green and weak double refraction by the Picrosirius-polarization method. In the immunohistochemistry analysis of collagen Ⅱ protein, the calcified cartilage was stained strong green fluorescence and the collagen protein parallelled in joint surface near the tidemark. The content of collagen Ⅱ protein was (20.16%±0.96%) of tissue dry weight by amino acid analysis, and that of the hydroxyapatite was (65.09%±2.31%) of the inorganic composition in calcified cartilage.

结果 天狼猩红染色见钙化软骨层与透明软骨层一样黄绿色淡染、弱双折光性；Ⅱ型胶原蛋白免疫组织化学分析，钙化软骨层呈强绿色荧光，潮线附近的胶原蛋白呈板层平行分布；氨基酸定量分析钙化软骨层Ⅱ型胶原蛋白含量占组织干质量的（20.16%〖KG-*4〗±0.96%）；X-射线衍射定量分析钙化软骨层中的羟基磷灰石含量占无机成分的（65.09%±2.31%）。

Using twisted pair copper line as access medium is one advantage of ADSL because this medium is widely distributed.

ADSL是宽带接入的重要技术，它的优点是利用广泛分布的双绞线为接入媒介，同时，也给组网提供了很大的灵活性。

Both for existing and newly planned networks, an intelligent combination of twisted pair and fibre optic cabling represents the best solution.

对现有的和新规划的网络来说，智能的结合双绞线与光纤布线是最佳的解决方案。

Koch inverse L antenna and Yagi antenna are made use of research the miniature technology of antennas.

在这章的最后一节里，作者基于广义的分形理论，提出了一种更为实用的天线——双弯折形线天线，并对它的几何参数作了探讨。

In Chapter Ⅲ, the global stability and global attractivity of some planar autonomous systems are dealed with.

第二章考虑平面自治系统同宿轨族的一些定性性态，证明了系统至多存在一个最大椭圆扇形，得到此系统的轨线趋于奇点及同宿轨族、闭轨族、双曲扇形和椭圆扇形的存在性与不存在性的充分或充要条件。

It was found that the phase separation behavior of PPESK, ie., PPESK/NMP/H_2O and PPESK/NMP/NSA, all agree with the LCP correlation. The binodal lines of the three systems were calculated according LCP correlation. Therefore, the maximum content of NSA in the casting solution can be calculated according to the binodal lines of the system, which is a scientific solution for the establishment for the composition of casting solution.

实验结果表明LCP关系可以用于描述PPESK／NMP／H_2O和PPESK／NMP／NSA三元体系在相分离时的浊点组成，并根据LCP关系外推计算三元体系的双节线，由此可得铸膜液体系中非溶剂添加剂的上限含量，为PPESK铸膜液体系组成的构建提供了可靠的科学依据。

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。