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Both of the ESD were proportional to kVp 2.2 to kVp 2.5 and were linear proportion to mAs. Inverse square law exists in the relationship of focus-film distance, FFD, and ESD. The impacts of field size and patient thickness to ESD are negligible. Optimized operating condition is chosen to improve the diagnosis rate and to reduce the patient dose. The ESD, 0.12±0.06 mGy, performing the optimized operating condition of chest x-ray examinations, is less than both values of reference doses recommended by NRPB and IAEA.

研究结果发现，入射表面剂量随操作条件而变，以相同的条件照射，三相位X光机所造成表面剂量大约是单相位X光机的1.9倍；入射表面剂量与kVp的2.2至2.5次方成比例，与mAs约成线性正比，与焦斑至底片距离的关系大约符合平方反比定律；照野面积及身体厚度虽会影响表面剂量的大小，但其程度远低於kVp及mAs的影响。

The suitable ionization chamber for the absorbed dose measurement in X-Knife is provided.

对X刀的输出剂量进行测量时，采用不同有效体积的电离室，对测量结果进行了比较，分析，提出了适合X刀的输出剂量测量的电离室。

Using potato tubers of Irish cobbler variety naturally infected with X- and Y-virus, the writer compared the concentrations of X-virus in the young sprouts of different seed pieces longitudinally cut from the same tuber and subjected to various temperatures, light and darkness, normal and dereased oxygen tensions during the period of germination.

在定温箱内所做的发芽温度试验的结果指出，块茎在20℃中发出的幼芽内X-病毒的浓度最高，沉淀滴度一般在1/80—1/160之间，最高的达到1/320，千日红上平均半叶斑点数目约为30.16°及24℃中的病毒浓度相近，沉淀滴度约为20℃的1/2，斑点数目达20℃的2/3左右。28℃发出的幼芽内病毒浓度最低，平均沉淀滴度约在1/10—1/20之间，平均半叶斑点数目为11.9。

Similarly, a graph X is said to be hyper-connected if every minimum vertex cut creats two components, one of which is an isolated vertex. In [8], D.Wang and J.

类似地，一个图X称为是超连通的，如果对每一个最小割集C，都有X—C只有两个连通分支，且其中一个连通分支为孤立点。

Give an efficient algorithm to compute the least common multiple of two n-bit number x and y, that is ,the smallest number divisible by both x and y.

给出一个计算最小公倍数：能同时整除x和y的最小的数。

In LISP, most variables are lexically scoped; that is, if foo calls bar and bar tries to reference x, bar will not get foo's value for x.

在LISP中，大部分的变量都是局部的，如果 foo 调用了 bar ，bar中虽然使用了名字为x的引用，但bar 得不到 foo 中的

The set of divergence points is defined as following : we obtain that either all has the same limiting point or the topological entropy of the divergence points is as big as the whole space x .

我们得到如果不是所有的点x x ，{ l _ nx }有相同的极限点，则d的拓扑熵和整个空间的拓扑熵相同。

Moreover, when the x in LiMn(subscript 2-x)LaO4 was less than 0.04, high capacity can be observed.

而且当掺杂量x≤0.04时，材料有较高的放电比容量。

Therefore, we designed a measurement based on the measurement of grating XY table to meet the measurement of the rail line rolling X, Y coordinates of the accuracy requirements.

因此，本文设计了一种基于计量光栅的计量型X-Y工作台，满足了测量直线滚动导轨对X，Y坐标精度的要求。

Then, straight from the starting point, to determine the best approach in a straight line y coordinates are integers, and let X from start-to-end change, every step an increase, calculated corresponding y, y = Response kx B, and admission pixel x, round

然后，从直线的起点开始，确定最佳逼近于直线的y坐标均为整数，让X从起点到终点变化，每步递增1，计算对应的y坐标，y=kx+B，并取象素。

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％。