象限

Any of the four areas into which a plane is divided by the reference axes in a Cartesian coordinate system, designated first, second, third, and fourth, counting counterclockwise from the area in which both coordinates are positive.

象限在笛卡尔坐标系中，被坐标轴分开的平面中的四个区域的任一个，命名为第一，第二，第三和第四，从此象限逆时针计算坐标为正数

The inflammatory reaction of hippocampus neurons were observed by electron lens using immunohistochemistry method.Results DR could shorten the escape latency and increase the number of passing plats and the swimming distance of the fourth quad compared with the other quads.

结果治疗组能缩短潜伏期、增加过台次数，第四象限与其它象限游泳距离之间比较也有差异，说明地黄饮子能改善痴呆大鼠空间探索记忆能力，低剂量组已经显效，高剂量组效果更为明显。

In the paper, a mathematical model of quadrant detector output signal was established by light energy integral.

通过光能积分建立象限探测器输出信号数学模型，分析了输出信号线性特性与光斑和光敏面半径比、信号采样精度、象限间光电特性均匀性等之间的关系，给出对应探测器输出最优线性特性的光斑和光敏面半径比值，采用分段线性化方法拟合探测器输出特性参数。

The layout of Web page had significant effect on first fixation in different quadrant of the same layout instead of first fixation distributing.

2不同网页布局首视点分布的象限差异不显著，但在同一布局下不同象限的首视点分布差异显著。

We look at the matrix map, the horizontal axis for market share, vertical axis is satisfied, we can see a lot of blue in the high point of market share range, is in the first quadrant and the fourth quadrant, only the domestic air-conditioning and refrigerator Brand is a high degree of satisfaction with the first Matrix, a general view that our domestic brands can be said to occupy a cost-effective in the low-end market, but in terms of satisfaction to be improved.

我们看一下矩阵图，横轴为市场份额，纵轴是满意度，可以看到大量蓝点分布在高的市场份额区间，就是在第一象限和第四象限，仅有空调和冰箱的国产品牌是属于满意度较高的第一矩阵，所以总体来看说明我们的国产品牌，可以说性价比占据了中低端市场，但是满意度方面还是亟待提高。

Can know from Figure 1, the growth media from a disadvantaged position the media, the strategy can go no more than two paths, one from the quadrant III Quadrant IV as the first arrival of the first I quadrant, that is, to raise the audience to reach, and then to raise the audience loyalty achieved; the second from the first quadrant III arrived by the first article I Quadrant II Quadrant, which is to raise the audience loyalty, and then raise the audience to reach to achieve.

由图1 可以知道，从一个弱势媒体成长为强势媒体，可以走的策略路径无非两条，其一由第III象限经第IV象限到达第I象限，即先提高观众到达，再提高观众忠诚来实现；其二由第III象限经第II象限到达第I象限，即先提高观众忠诚，再提高观众到达来实现。

According as different projection of point of fall for Rocket in XOZ quadrant, the correction points are searched with the method along OX axle for errors point of fall, first correction point is searched in first quadrant, second t correction point is searched in second quadrant, third t correction point is searched in third quadrant and so on.

该方法以炮弹落点在XOZ象限投影的不同，沿落点偏差轴OX 寻找推冲点：第一象限一次可寻找到第一修正点，第二象限则应寻找第二点，以至第三点。

The invention refers to a method to correct universal frequency of electric communication technique, its character: make signal index quantization on the complex number of cross product, to directly reflect the quantized numerical value of tangent value and the located quadrant of imaginary and real parts, use inverse tangent ROM table to discriminate the processed result, then make loop filter and phase accumulation on the discriminated result to obtain error-correcting angle, and use digital controlled oscillator to make table look-up and quadrant adjustment to obtain correcting factor; use the relationship of trigonometric function in each quadrant to compress inverse tangent look-up table ROM and digital controlled oscillator look-up table ROM.

一种涉及电通信技术的通用频率纠正的方法，其特征在于：它采用如下步骤：经过叉积的复数进行信号指数量化处理，通过该复数虚、实部信号的指数量化结果的差值及其极性直接反映虚、实部的正切值的量化数值以及所处象限，将处理后的结果通过反正切ROM表进行鉴频，鉴频后的结果经环路滤波和相位累加，得纠偏角度，通过数控振荡器针对纠偏角度进行查表和象限调整，得到纠正因子；通过个象限之间的三角函数关系来压缩反正切查表ROM和数控振荡器查表ROM的大小，本发明资源耗费小，效率高，可极大地节省内存资源。

The concept of exponential transformations of rectangular Cartesiancoordinates is introduced, showing that a plane curve is more frequently expressed by a unionof four or fewer quadrantal equations defined uniquely in the respective quadrants whichthe curve covers and are therefore quadrant invariant, then the Fermat curve s with someof their geometric properties are formulated.

引入直角笛卡儿坐标幂变换的概念，说明一平面曲线是较经常地用4个或更少的象限方程的并集来表示的；这些象限方程是在曲线所在的各个象限中惟一定义的，因而是象限不变的。然后列出费马曲线的方程，并简述了费马曲线的一些几何性质

In other words, the service sector can be considered aschanging form from allocation of income in Department Ⅲ to productionof means of subsistence in Department Ⅱ.

也就是说，服务部门可以理解为由第三象限的收入分配领域向第二象限的消费资料生产部门的转变，一部分的服务部门可被看作是转变到第一象限的生产投入部门。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。