查询词典 Y-branch

The reason that zero can not be divisor, is right?Feng XinkongIn the eighth book of six-year primary school's teaching in nine-year compulsory educationmaterials, it states that "zero can not be divisor". But we can find that the formula, a=cq, checking the dividing exactly , is same as the form of direction proportion function, y=kx; the formula of checking the dividing not exactly, a=cq+r, is same as the form of simple function.

在九年义务教育六年制小学教科书《数学》第八册中规定"零不能作除数"，但是当我们学习了正比例函数和一次函数之后就会发现，验算能整除的除法的关系式a=cq和正比例函数y=kx的表示形式相同；验算有余数除法的关系式a=cq+r与一次函数的关系式y=kx+b的表示形式相同。

To meet therequirements of large-scale of oil refining equipments, rigorousness oftechnical conditions and complexity of structures, special pipe fittings suchas Pants tees and Y-tees are used for the purpose of reducing fall ofpressure and temperature. However high stress concentration is alwaysfound there, cause underlying safety problems.

随着炼油装置的大型化和工艺条件要求的提高以及结构的复杂化，为了减小压降和温度降，采用裤型三通、Y 型三通一些特殊的管件形式，在 Y 型三通、裤型三通的局部往往会有应力高度集中，给设备安全造成隐患。

The slope estimate is the sample covariance between x and y divided by the sample variance of x.

斜率估计量等于样本中x和 y 的协方差除以x的方差。若x和 y 正相关则斜率为正，反之为负。

Methods At first, the relationship of linear or non-linear between dependent X and independent Y in original data can be distinguished by scatter diagram which can be made through Excel software.

方法通过利用Excel可绘制散点图的功能，了解原始数据自变量X和因变量Y间的线性与非线性关系，并由自变量X和因变量Y的自然对数转换后的散点图的情况，决定采用何种曲线拟合。

L The tangent problem. Given a function y = f and a point P on the graph of f , this problem asks for the equation of the line that locally shares with the graph just the point P .

切线问题：给定一个函数f和函数图形y=f上的一点P，这个问题是要求一条和y=f"局部分享恰于点P"的直线的方程式。

Based on the molecular topological theory,we introduce a new topological index Y and use it to study for salt effect constant k s of aliphatic acids in the salt solution.

以分子拓扑理论为基础，提出了新的拓扑指数Y ，并用Y研究了 4种脂肪酸在盐水溶液中的盐效应常数ks。

Compared with the "three antibodies method", the sensitivity for detection of the signal of Y chromosome fluorescence in situ hybridization in brain tissue sections of mice was enhanced significantly by the direct tyramine signal amplification method.

结果 "三步抗体法"在脑切片检测Y染色体阳性信号的灵敏度和特异度分别为85.67％和100％；直接TSA法在脑切片检测Y染色体阳性信号的灵敏度和特异度分别为92.82％和100％。

While a male cell has an X chromosome from the mother and Y chromosome from the father.

而男子的细胞有一个X染色体来自母亲，一个Y染色体来自父亲，而Y染色体仅决定性别。

Hence, the antenna along the y-axis does not send any light to the observer directly below it.

因此，沿y轴的天线，对y轴正下方的观察者不发送任何光波

It was shown that Ce and Y segregation excess decreased, attributed to inhibiting effect of yttria doping.

晶界偏析表明，晶界Ce、Y偏析量减少，这是Y〓O〓的掺入能够抑制CeO〓向晶界偏析的结果。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。