查询词典 sum

Summation of infinite series is part of the process of learning more difficult to grasp the progression part, this article summarizes the common summation of several infinite series method, as has the use of progression and the definition of sum, the use of itemized points or one differential sum, the use of split-phase elimination method of summation methods, and problem-solving steps in detail.

无穷级数的求和部分是学生学习级数过程中较难掌握的部分，本文归纳了常见的几种无穷级数的求和方法，像有利用级数和的定义求和、利用逐项积分或逐项微分法求和、利用裂项相消法求和等方法，并提出了详细的解题步骤。

By analyzing the characteristics of CCD noise and taking into account the impact of video noise upon Sum Norm Difference and Sum of Absolute Difference of a macro-block,a Noise Variance Adaptive two-stage Successive Elimination Algorithm for block motion estimation is presented.

通过分析CCD 噪声的特点以及噪声项对宏块的和范数差值与绝对差值之和所产生的影响，研究了一种应用于噪声视频的两阶段连续消除算法。

Evaluation each period of green food business enterprise piece, habitat monitor area, real object total amount and sale sum Be importation index sign; Again selection each year green food export sum is output index sign, to 1999-2006 year China green food development level of time sequence data calculation result enunciation: Green the food export's ability exaltation trend, which is a DEA for 2004-2006 years valid of age, but further analysis after detection: Green food yield 2002-2006 year average growth 29.2%, but export rate didn't°yet break 13%, and every year export rate growth not arrive a percentage point, and the demand of international market at continuously extension, particularly west nation green food consume growth the rate is in above 20%, this has already result in produce and foreign trade mutually separate, can't orientation open of market economy of request, this elucidation our country green food export development medium of strategy existence very great problem, For further expanding the international market, the analysis of market-orientation should be strengthened, the product quality and enterprise credit should be improved and the proper strategy and way to access market should be taken in order to break through the green barrier and keep up the competition ability which can be continuously developed.

评价将各期的绿色食品企业个数，产地监测面积，实物总量和销售额作为输入指标；再选取各年绿色食品出口额为输出指标，对1999——2006年中国绿色食品发展水平的时间序列数据计算结果表明：绿色食品出口能力呈现逐年提高趋势，2004——2006年是DEA有效的年份，但进一步分析之后发现：绿色食品产量2002—2006年平均增长29.2%，而出口率还没有突破13%，而且每年出口率增长不到1个百分点，且国际市场的需求量在不断扩大，尤其西方国家绿色食品消费增长率在20%以上，这已造成生产与对外贸易相分离，不能适应开放的市场经济的要求，这说明我国绿色食品出口发展中的战略存在很大问题，需要进一步开拓国际市场，加强市场定位分析，提高产品质量和企业信誉，并选择适宜的进入战略及方式，以利于冲破绿色壁垒和保持持续发展的竞争能力。

Equivalence occurs whenever a sum or a series is the time value of another sum or a series.

每当某一金额或序列是另一金额或序列的时间价值时就发生等值。

Equivalence occurs whenever a sum or series is the time value of another sum or series.

任 何时候只要此时的量或级数等于彼时的量或级数，那么就发现了相等现象相等现象。

The sum of two positive integers is 29, find the minimum value of the sum of their squares.

两个正整数之和为29，求此两数平方和的最小值。

There exist nT-rings R such that every element of R is a sum of 3 squares and a sum of 4 cubes.

还证明了存在该类型的nT-环R，R的每个元素是3平方和和4立方和。

Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum.

举一个例子，10以内的所有自然数的和的平方与它们的平方和的差这样计算

In C under the TSA Sanchez Theorem : A sum of the cube can be written a bunch of odd that the sum...

在C下实现的尼科梅切斯定理：任何一个整数的立方都可以写成一串奇数之和即任意一个正整数n的立方分解成个连续的n个奇数之和。

Fused current method is adopted in the device for fault feeder detection. This method uses vector sum of compensated current and zero-sequence current and selects fault line according to different distribution of the sum.

该装置采用了一种新的接地选线的算法－电流融合算法，该算法将补偿电流与故障零序电流矢量求和，根据故障与非故障线路矢量和分布在不同区间作为选线判据。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。