1) rectilinear generator
直母线
1.
The paper proves that the surface normal,which is followed by rectilinear generators on hyperboloid of on sheet,comstructs the hyperbolic paraboloid generated by two same parabola,when rectilinear generators go through the vertex of waist ellipse,and it also deduces that the hyperboloid of one sheet is constructed by surface normal through a certain rectilinear generator.
证明了当单叶双曲面的直母线过腰椭圆顶点时,沿着它的曲面法线构成一个由二全等抛物线生成的双曲抛物面,并推导出对单叶双曲面,沿着它的任一直母线,曲面的法线均构成双曲抛物面。
2.
Some properties on rectilinear generators of hyperboloid of one sheet are researched.
给出并证明了单叶双曲面的直母线的若干性质 ,讨论了单叶双曲面与其渐近锥面的直母线之间的关
3.
It proves the three special natures of rector radius the vecfor of rectilinear generator and the two vectors on ruled surface derived cur
证明了直纹面导线上向径和直母线上单位向量与此二向量的切向量的三个特殊性
2) ruling of a ruled surface
直母线
1.
This article discussed the rationalization which ruled surface satisfied (a′(u),b(u),b′(u))=0 is developable surface r(u,v)=a(u)+vb(u) and verifies that only bunch of ruling of a ruled surface is essential condition but not full condition of developable surface.
探讨了满足条件 (a′(u) ,b(u) ,b′(u) ) =0的直纹面r(u ,v) =a(u) +vb(u)为可展曲面的合理性 ,验证了只有一族直母线是可展曲面的必要但不充分条
3) DC bus
直流母线
1.
Analysis of a DC bus loss of power and its solutions in the power substation
一起变电站直流母线失电原因分析及解决方案
2.
To ensure the reliability of DC system,the insulation status of DC bus must be entirely monitored online.
为了保障直流系统的安全可靠运行,通常发电厂、变电站使用的直流系统绝缘监测装置是通过检测对称电桥的不平衡程度来反映直流母线的绝缘情况,但当正负母线绝缘均按比例下降时就失效。
3.
However,the use of multi-inverter wiring with a common DC bus, make the power feeding back can be absorbed by other electric motor,and the excess electricity can also be feedback to the power grid through the feedback device,so that power can be fully utilized.
但是采用了多逆变器公用直流母线的接线方式后,电机回馈制动所产生的能量可以被其他电动状态的电机吸收,而且多余的电能还能够通过回馈装置回馈电网,使电能得到充分的利用。
4) quasi-ruling
伪直母线
1.
Firstly, triangular facet model is used to present a complex surface, and its quasi-rulings are computed.
首先把CAD/CAM常用的参数曲面转化为三角剖分模型,求出曲面的伪直母线;然后基于伪直母线对曲面进行自适应分片;最后展开每一片曲面区域。
2.
In this paper,a new method for development of hull plate surface based on its quasi-rulings is presented.
本文提出了一种基于伪直母线的船体曲面钢板展开方法。
5) busbar's diameter
母线直径
6) rectilinear generator
直绞母线
补充资料:均衡母线接线
均衡母线接线
balance-bus scheme
均衡母线接线个发电机一变压器-。黑蓄竺亡尝、整eme,每-,一“~华/‘侧p理迈另一合断改段位到一组公共均衡母线的主接线方式.这种接线是由变压器一线路组接线演变而成,增设了均衡母线,可使各回路间电能均衡分配。也可认为是一个半断路器接线去掉一组母线和一台断路器的简化接线方式。按均衡母线断路器位置,可分为外均衡母线接线(均衡母线断路器接在线路侧)和内均衡母线接线(均衡母线断路器接在变压器侧),分别见图(a)、(b)。┌───┬─────┬────┐ ├挚¨┐│ 1 │.、 │ │ 、│├蛰-%┐ │ │ │ ││ 、│ ├───┬┼─┐├──┴┼──┘ │.臼.- ││ ││} │ │ 班 ││ ││ │ ├───┘└─┘└───┴─────┘ 均衡母线接线 (a)外均衡母线接线,(b)内均衡母线接线 这两种接线方式的共同优点是:①接线清晰.②布置简单。③运行方便,故障影响范围小,运行可靠性较高,尤其对线路物送功率和发电机容量相当,或者输电线路基本送往同一方向或同一变电所时最为适用。共同缺点是:①灵活性差,均衡母线检修,全部解列成各自单独的发电机一变压器一线路组单元运行.②均衡母线上的断路器故障,除影响本回路变压器一线路组单元停电外,其他单元也将解列运行。 外均衡母线接线的优点是:①主变压器的投人或切除比较方便。②一台主变压器故障只开断一台断路器,不影响线路的运行。缺点是:①出线断路器检修将影响发电机变压器组送电。②线路故障需同时开断两台断路器,并需满足并联开断的要求。 内均衡母线接线的优点是:①线路的投人或切除比较方便。②一回线路发生故障时,仅故障线路的断路器断开,不影响其他回路的运行.缺点是:①一台主变压器故障,同时开断两台断路器,并切除一回线路。②主变压器的投入或切除需同时开断两台断路器,并影响线路的运行。 均衡母线接线一般适用于进出线回路数相同,出线负荷较稳定,且负荷基本与发电机容量相一致,并且电力系统允许按发电机一变压器一线路组单元运行的大中型水电站.当电站利用小时数较低,担负调峰任务,主变压器切合频萦时,一般采用外均衡母线接线。
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参考词条