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数字之和
相关语句
  digital sum
     On average computation of the base n digital sum function
     关于n进制中数字之和函数均值的计算
短句来源
     An exact calculating formula for the digital sum function average A(N) in the n-nary is siven.
     给出了 n进制中数字之和函数均值 A(N)的一个精确的计算公式
短句来源
  “数字之和”译为未确定词的双语例句
     Let a positive number is expressed in base 2 ,then an exact third power mean value computing formula of digle funtion sum is given.
     在一个正整数的二进制表示中 ,给出数字之和数论函数的三次均值精确计算公式
短句来源
     Let d s(n) denotes the sum of the base 10 digits of n∈N . For natural x ≥2 and arbitrary fixed exponent m∈N ,let A m(x)=∑n
     令 ds( n)表示正整数 n的十进制表示中的各位数字之和 ,对正整数 x≥ 2和任意固定的 m∈N,令 Am( x) =∑n
短句来源
     In consideration of the fact that the precision of random numbers produced is fixed, the concept of the sum of mantissa is proposed based on the sum of n numbers behind the decimal, and an algorithm for calculation of the distribution frequency of the sum of mantissa is developed.
     利用生产的随机数精度固定这一特点,根据小数点后面n个数字之和,提出了尾数和的概念,并给出了求尾数和分布频数的算法.
短句来源
  相似匹配句对
     FIGURE
     数字
短句来源
     Digital
     数字
短句来源
     A Study On the STB of Digital TV
     数字电视机顶盒初探
短句来源
     Controversies Over Formate of Digital Video CD
     数字视盘的格式
短句来源
     On average computation of the base n digital sum function
     关于n进制中数字函数均值的计算
短句来源
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  digital sum
In [2] it was observed that applying estimates of incomplete sums, one can prove that some codes of this type have small running digital sum compared to the block length.
      
The digital sum of digital mix data and DAC input data is clipped at plus or minus full scale and does not wrap around.
      


Deflocculation state was considered to be necessary for better fluidity and spreadability of barium sulfate suspension taken as an X-ray contrast medium in the examination of gastro-intestinal tract. The Zeta-potential of the barium sulfate particles in increasing. concentration of different electrolytes was measured by the eletrophoretic method in a Burton Cell. The results were compared with the corresponding sedimentation volume. It was found that the Zeta-potential ranging from 50 mV to 66 mV favored the...

Deflocculation state was considered to be necessary for better fluidity and spreadability of barium sulfate suspension taken as an X-ray contrast medium in the examination of gastro-intestinal tract. The Zeta-potential of the barium sulfate particles in increasing. concentration of different electrolytes was measured by the eletrophoretic method in a Burton Cell. The results were compared with the corresponding sedimentation volume. It was found that the Zeta-potential ranging from 50 mV to 66 mV favored the deflocculation of the suspension, while that below 22 mV, flocculation was affected. The viscosities of 100%, 130% and 150% barium sulfate suspensions were measured using Hoppler's Rheo-viscometer. The viscosity dropped quickly at first on the addition of electrolytes, and then increased to some extent with further increase of electrolyte concentration. The minimum viscosity was considered to reflect complete deflocculation of the suspending particles. The electrolyte concentration producing minimum viscosity was shown to be the most effective deflocculating agent tested, while sodium pyrophosphate and sodium citrate are less effective.The flocculation of the barium suspension by the gastric fluid after ingestion often leads to some troubles to the roentgenologists. We examined the ability of different electrolytes to retard such flocculation by means of the viscosity method.

测定了硫酸钡不同工艺制成品的粒度分布。证明北京三厂中间产品(湿膏)本来粒度很细有97%是在4μm以下,但烘干后成品粒度变粗,80μm以上的粒子占62%。这对造影效果会产生重要影响。喷雾干燥产品的粒度分布与原湿膏基本相同。用电泳法测定了硫酸钡混悬剂的动电位,确定硫酸钡是荷负电的。混悬剂的动电位在22mv以下可产生絮凝,适合于反絮凝的动电位是在50~66mv之间。电解质中六偏磷酸钠、焦磷酸钠和柠檬酸钠的反絮凝效力是按上列顺序减低的。例如配制100%硫酸钡混悬液三种电解质最适宜的浓度分别为5×10~(-3)M、2×10~(-2)M和3×10~(-2)M。本文用粘度分析法研究了混悬液的絮凝反絮凝过程,所得结果与动电位和沉降容积的结果基本吻合,惟粘度法方便迅速并能反映出细小的变化,可用数字和曲线作鲜明的对比。但此法要求颗粒要细(10μm以下)否则会发生机械性阻碍无法测定。

This report first intruduced the problems U. S. automotive industriesfaced in the 80's, i. e. , fuel economy, exhaust pollution and safety. To satisfy thegovernment regulations of the above three items, industries were forced to reducecar weight, so the material used in automotive industries would have to be reevaluated.The use of HSLA steel, aluminum and its alloys and plastics will be increasedin the 80's. The author gave concrete figures of this increment and typical partsmanufactured by the above materials....

This report first intruduced the problems U. S. automotive industriesfaced in the 80's, i. e. , fuel economy, exhaust pollution and safety. To satisfy thegovernment regulations of the above three items, industries were forced to reducecar weight, so the material used in automotive industries would have to be reevaluated.The use of HSLA steel, aluminum and its alloys and plastics will be increasedin the 80's. The author gave concrete figures of this increment and typical partsmanufactured by the above materials. He also pointed out that the formability ofHSLA steel is au important parameter and are concrete examples as how to avoid these forming failures. Finally, he introduced a new material-carbon fibre composite material. Its properties and prospective usages were also given.

本文作者1979年应冶金部邀请访华。本文是他在北京所作学术报告纪录稿(本刊有删节)。文中介绍了美国汽车工业进入80年代后面临的挑战:燃油经济性,排气污染与安全等。说明为了满足政府对上述三项的规定,必需减轻汽车的自重,对制造汽车用的材料,将需要重新估计。进入80年代后,低合金高强度钢、铝及铝合金和塑料的使用将增加,给出增加的具体数字和制造的另件种类,指出使用高强度钢时需要注意其冲压成形性,并给出实例,最后介绍新型材料碳纤维组合材料的性能和使用。

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本文叙述了中国科学院地理研究所开展地理环境信息系统研究中建立的制图软件。按其功能可区分下列程序:1)绘图基本操作程序,2)地图符号、数字和文字程序,3)曲线光滑程序,4)面状晕线程序,5)网格数据类型边界输出程序,6)等值线程序,7)透视立体图程序。文中简要地阐述了设计这些软件的原理、算法、功能和应用。通过附有的试验样图说明使用这些制图软件可制作各种类型的专题地图——符号地图、线画要素地图、统计地图、等值线图、类型地图及立体图等。

 
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