According to traditional power triangle ( the square of the active power , reactive power and apparent power form the relation of the right triangles ) , put forward a new electrician ' s theories of power quadrangle 基于传统的功率三角形(即有功功率，无功功率，和视在功率三者的平方成直角三角形的关系) ，提出了功率四边形这种新的电工理论。
The main results obtained in this paper are as follows : ( 1 ) it is discovered that the nine - point difference scheme is not consistent over any irregular quadrangle grid except that the grid is consists of some congruent parallelograms 所获主要结果如下： ( 1 )通过大量数值试验和理论分析，揭露了九点差分格式在不规则四边形网格上按经典意义不相容的缺点。
It s organized in a quadrangle , a group of four lines , so i organized my music in this sort of four - line group . for example , a recurring theme in the poem is the three - word line , " how many miles ? " and this recurs several times 这是一首四行诗，所以我的音乐就配合它四行一组的特性，例如诗里有著三个字有多远的重复旋律，而且出现了很多次，第一次是出现在第二段，内容是
The vip suite room is also the principle room of the whole quadrangles . it s located at the north side and facing the south . the bed - like compartment which was carved with the pattern of " peonies " separates the room into three functional areas 贵宾房，亦即正房，是整个四合院中最豪华也是最尊贵的房间，位于院落的北部，座北朝南，雕有“富贵牡丹”的碧纱橱将房间分为三个功能区。
In numerical calculation , the paper employs the collocation method to compute the coupled boundary integral equations . this paper builds one - quarter wire race and one eighth rolling ball contact model , employs both quadrangle and triangle element and forms the contact pairs 建立了1 / 4钢丝与1 / 8滚动体的接触模型,同时使用四边形八节点单元和三角形六节点进行单元划分,并形成了接触点对。
Adopting triangle cell and quadrangle cell plotting patterns , mathematical model of sensitivity field is built to calculate sensitivity , and using these projective data and image reconstruction algorithm to obtain the distribution image of multiphase medium in the measured area 建立了敏感场的数学模型，进行敏感场计算，以此为投影数据，采用图像重建算法，获得被测区域内多相流介质分布状况的图像。
In fact , we have done theoretical analysis and a series of numerical experiments , which show that for the nine - point scheme applied to a system of two - dimension three - temperature equations over an irregular quadrangle grid , both the local accuracy and global accuracy are very disappointing 事实表明九点格式仅在均匀平行四边形网格上具有较好精度，在一般的不规则四边形网格上，其局部及整体精度都是非常令人失望的。
In order to solve two - dimension three - temperature energy equations over an irregular quadrangle grid , a lot of researches have been done in literature , and several different approaches have been proposed , such as five - point difference scheme , nine - point difference scheme , flux iteration scheme , finite element scheme , etc . up to now , the nine - point difference scheme is in general recognized as the better one and is used more generally 为了在不规则四边形网格上求解二维三温能量方程，长期以来人们已作了大量研究，先后提出了五点差分格式、九点差分格式、流迭代格式及有限元格式等等。迄今为止，人们公认较好且应用较广的是九点差分格式。
Components , structure and surface morphology of the resulted films were identified by fourier transform infrared ( ftir ) spectroscopy , x - ray diffraction ( xrd ) and scanning electronic microscopy ( sem ) . the analyses showed the content of cubic boron nitride in the resultant films on substrates was rather high and crystal particles of c - bn with uniform size , smooth crystal plane and regular shapes ( quadrangle and hexagon ) densely arrayed on the substrate 傅里叶转换红外吸收( ftir )光谱仪、 x射线衍射( xrd )仪和扫描电镜( stm )的测量结果显示，基底上的bn膜中立方相含量很高，且晶粒大小均匀、排列致密，晶形呈规则的四角和六角形。
On the assumption of ignoring the distortion of thickness , this paper determines the rough shape by the geometric modeling method of equal area developing using mixed mesh cell of triangle and quadrangle for the first time , presents the equal area developing arithmetic of quadrangle - triangle . on the virtual geometric symmetry axis , we puts forward the method of determining the developed coordinate of the point on the base band in the development of using regular quadrangle cell , determines the developed shape of internal structure in plane utilizing point - to - point mapping theory . furthermore , we realize the approximate developing of undeveloped - irregular boundary surface using a few triangle cells 本文结合型号研制中小曲率机翼整体壁板类零件坯料展开课题，基于板料厚向变形忽略不计的先验假设，首创混合四边形-三角形网格等面积展开的几何模拟法确定壁板类零件毛坯外形，给出了混合四边形-三角形网格等面积展开算法；提出了虚拟分割线的概念，采用虚拟几何对称轴，给出了规整四边形单元展开基带上结点的计算方法；采用映射原理和求交算法确定了壁板内部结构信息的展开定位。
