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A device and method for preparing compound nano fiber endless tow, which contains feeding material liquid to pair of electric spinning nozzle on frame, each nozzle respectively applied with high dc voltage with opposite polarity, each pair of nozzle jetting out nano fiber with opposite electric charge, said nano fiber attracting and colliding each other to form compound nano fiber, then forming nano fiber endless tow after drawing and stretching, the first opposite set pair of electric spinning nozzle jetted compound nano fiber endless tow is stretched down and used as acceptor which covered by the nano fiber jetted by second pair of nozzle an d forming two layers of compound nano fiber endless tow after drawing and stretching, in turn to get multilayer compound nano fiber endless tow after drawing and stretching by godet roller.

复合纳米纤维长丝束制备装置及其制备方法是一种简单、高效电纺制备纳米纤维长丝束的方法，其步骤为将料液输送给支架(3)上的电纺喷头对(1)；喷口相向的电纺喷头对(1)的每个喷头分别施加相反极性的直流高电压；每对相向喷口喷出分别带相反电荷的纳米纤维，并在空中相互吸引、碰撞形成复合纳米纤维，经牵引、拉伸后形成复合纳米纤维长丝束；第一对相向放置的电纺喷头纺丝形成的复合纳米纤维长丝束向下拉伸，并作为接受体与第二对电纺喷头喷出的分别带相反电荷并相互吸引的纳米纤维在空中相遇，被第二对电纺喷头喷出的纳米纤维包裹，经牵引、拉伸后形成两层复合纳米纤维长丝束；依次类推，最后经导丝辊对(2)牵引、拉伸后得到多层复合纳米纤维长丝束。

The import picture feature is useful for displaying graphics from other applications in your drawing. For example, a cross-section drawing could be imported as a DXF file from AutoCAD for use as a background graphic while defining the problem domain. This feature can also be used to display things like photographs or a company logo on the drawing. Pictures are imported as an AutoCAD DXF file, a Windows bitmap file, an enhanced metafile, or a Windows metafile,.

重要的图片特征便于从图中其他应用中显示图形，例如，当定义模型要素时，一个网格部分可以输出为DXF文件便于AutoCAD作为图纸背景使用，这种特征也可被用来在图中显示比如图片或公司logo，图片可以被输出为：AutoCAD DXF、BMP、EMF、WMF等格式。

The recognition method of circuit drawing plotted by AutoCAD is proposed It uses the topological graph to describe the electrical symbol s drawing and adopts the isomorphic graph algorithm to recognize the electrical symbols, meanwhile,the circuit wires are also recognized It can recognize the circuit drawing automatically with high accurac

提出自动识别使用AutoCAD绘制电气原理图的方法该方法利用拓扑图表示电气符号，采用图的同构算法识别电气符号，并在识别出电气符号的基础上识别电路线该方法能够以较高的准确率自动识别电气原理

In traditional 2D design process, designer converts his ideas to 2D drawing then forming assembly drawing and parts drawing. The designer's thought works between 3D ideas and lines of plane projection.

在传统的二维设计过程中，设计者首先将其构思转化成平面图，形成总装配图和各个零件图，设计者的思维一直在三维构思和平面投影的线条之间进行转换。

The classical cutting stock algorithm——column generation technology , and wrap up rectangle technology for abnormity are analyzed ; The development of AutoCAD with ObjectARX is studied and the generating method of cutting outline drawing and layout drawing were found out on the basis of analyses of the graph database structure of AutoCAD and the basic operation of it ; The process planning technology of plate material cutting orienting numerical control is studied a process planning method directly based on layout drawing is established ; The emulation technology in AutoCAD is studied and a kind of dynamic emulation method is put forward , which is realized by incrementally modifying graph entity ; The postposition of NC program of the integrated cutting system constructed on software plug-in is proposed , which can effectively solve the problem that it is difficult for a numerical control programming system to be common , which is caused by the difference of instruction format and control parameter between different type of numerical control machine .

分析了经典的矩形件优化排样算法——列生成法和针对异形件的矩形包络算法；研究了基于ObjectARX 的AutoCAD 开发技术，结合对AutoCAD 图形数据库结构及其基本操作的分析，给出了下料轮廓图和排样图的生成方法；研究了板材数控下料加工的工艺处理技术，建立了一种直接基于排样图进行的图形交互工艺规划方法；研究了在AutoCAD环境中的板材下料数控仿真技术，给出一种通过增量修改图形实体对象实现的动态仿真方法；提出以软插件技术构建集成下料系统的数控编程后置处理部分，能够有效解决因数控下料机床指令格式及控制参数不统一导致的自动编程软件系统不易实现通用性的问题。

Qi Baishi is one of the most famous Chinese artists who enjoys world reputation. During the one-century art career, with the unyielding resoluteness and enterprising spirit Qi Baishi unceasingly studied the drawing art, eventually he succeeded in setting up one kind of drawing style, opened a new epoch of Chinese drawing art, devoted valuable spiritual wealth to mankind.

齐白石是享誉世界的中国现代艺术大师，在近一个世纪的漫长生涯中，他以坚韧不拔的毅力和勇于进取的精神在绘画艺术领域不断探索创新，最终取得衰年变法的成功，开启了现代绘画一代新风，在中国美术史上写下浓墨重彩的一笔，为世界文化艺术宝库奉献上一笔宝贵的精神文化财富。

The paper uses Fortran language to compile the subroutine wich is similar to the window and view sentence in BASICA,and rewrites the drawing point and line subroutine with the assembled subroutine of drawing line in the reference one,thus FORTRAN drawing is not limited by the actual border of the screen and is able to enlarge,reduce and cut the graph.

用 FORTRAN 语言编写了类似高级 BASIC 绘图中窗口和视口语句的子程序，利用《高级语言图形开发功能初探》一文中画线汇编子程序，重新编制了画点和画线子程序，使 FORTRAN 绘图不再受屏幕实际边界的局限，可方便地实现图形的放大，缩小与剪辑。

Draw the effective composition of the red red-spotted stonecrop through drawing the law in ultrasonic wave at first, learn through the experiment that drawing time , density , firm liquid in supersound will have remarkable influence than on the drawing rate of supersound; 60% ethanol solution of solution, than remarkable ultrasonic reciprocation of time firm liquid have; The best experiment condition is: Solvent solution, firm liquid than for 1:10, draw 45min for 60% ethanol..

首先通过超声波提取法，来提取红景天的有效成分，通过实验得知超声提取时间、浓度、固液比对超声提取率均有显著的影响；溶液中的60%乙醇溶液，固液比及超声时间的交互作用显著；最佳实验条件为：溶剂为60%乙醇溶液、固液比为1：10、提取45min。。

It adopts the International Standard of ISO and IEC standard to develop and manufacture the product of 4 series and 30 kinds, such as Alloy Aluminium and copper CCR Line, Alloy Aluminium and copper rod breakdown machine, middle wire drawing machine, fine wire drawing machine, tubular strander, specific wire drawing machine and ancillary equipment, etc.

秉承优良传统，采用ISO、IEC国际标准和国家标准研发制造产品，现已形成以铜铝合金杆生产设备系列、铜铝以及合金线拉制设备系列、绞制设备系列、特种线材加工设备等为主导产品的4大类、30余种电工专用设备。

Over the years, obsorbing the advanced technology, the Association has developed the straight line drawing machines, wet drawing machines, upside down style wire drawing machines, spool take-up, pay-off unit, wheel heat treating winder, heat treatment take-up, pay-off unit, strander machines, pre-treatment line machines.

多年来，吸收先进的专业技术，已研制开发了具有国内领先水平的直进式拉丝机，水箱拉丝机，倒立式拉丝机，收放线机组，工字轮热处理收线机，热处理收放线机组，预处理作业线，管式股绳机和成绳机。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。