冗余

In most cases, it's redundant to have two possible values for "no data;" Django convention is to use the empty string, not NULL .

在大多数情况下，用两种值表示没有数据是冗余的，所以 Django 的惯例是使用空字符串，而不是 NULL。

The benefit of this analysis is, a class hierarchy obtained is guaranteed to be behaviourally equivalent to the original hierarchy of the application program, and in new hierarchy the object only contains the members really required but no redundancies.

这样做的好处是：所得到的类体系不仅等价于应用程序最初的类体系，而且在新体系中对象只包含它真正需要的成员，没有冗余成员。

In this paper, a concept of the degree of observable redundancy is proposed.

摘要本文提出了状态完全可观冗余度的概念。

One of the ways to solve the problem above is actualizing the digital corresponding, transforming the image to the digital signals, wiping off the redundancy outlying of the image quality. Furthermore, on the precondition of ensuring the quality, storaging, recording and transmitting the digital signals is oecumenical, credible and all wool and a yard wide using least bits or bits ratio.

解决这个问题的途径之一，是实现图像通信的数字化，把图像信息转换成数字信号，去除与图像质量无关的冗余信息，并且在保证质量的前提下，用最少量的数码或数码率，实现各类图像的数字存储、数字记录或数字传输，达到优质、可靠、经济的要求。

Firstly, all the terms concerned are split up into basic term elements-termels, then eight aspects of quantificational indexes are given: errors-in-printing ratio,'inconsistent/uncanonical spelling' ratio,'unnecessary one-many/many-one correspondence' ratio,'inequivalent term' ratio,'discrepant interdisciplinary term' ratio,'unconformable-to-GB term' ratio,'incomplete/redundant term' ratio, and overall 'term worthy of revision/discussion' ratio.

其基本方法，一是从名词集中拆分出基础要素－名词元；二是提出八项量化指标：印误率，英语拼写不一致与不规范率，非必要的一多与多一对应率，英汉名词不对等率，与交叉学科名词有异率，与国标定名不符率，收词欠完备与冗余率及总体值得修榷率。

In order to improve the redundancy and computing capability of S transform, a more efficient representation is introduced, by introducing an orthogonal set of basis functions that localizes the spectrum and retains the advantageous phase properties of the S-transform.

为了改善S变换的冗余度，提高S变换的计算能力，研究了S变换的一种有效表示。通过引进一组正交基函数来局部化频谱，并保留S变换相位特性上的优势。

By eliminating redundancies and modifying orthogonal projection process, a new scheme with low complexity is proposed.

通过改变正交映射方式和删除冗余，提出了一种新的PTS快速相位优化算法。

The results show that the error in wavelet reconstruction with redundant frames is less than that with orthonormal basis.

这些结果表明用冗余框架进行小波重构要比用正规正交基进行小波重构的误差小。

However , the overabundance of old and new information , and rapid emergence of web - based search engines have generated a great amount of redundant search results and affected the efficiency and accuracy in terms of users search efforts

然而，新旧信息的交织和网络检索工具的层出不穷，导致了用户检索出大量冗余信息，也增加了用户识别信息的负担，更影响了用户的信息查准率和检索速度。

The results showed that the 50% leaf removal could increase the yield of sound boll by 24.4% that suggested the happening of overcompensation. The 25% leaf removal had no influence on cotton plant height and protein content in leaves, suggesting the 25% leaf removal in standard falling into the category of growth redundancy, but the climax in protein content in cotton leaves postponed about one week.

在棉花盛蕾期，用剪刀剪除棉花标准叶面积的25%和50%，模拟田间害虫的食叶危害程度，结果显示：50%去叶处理可使棉花成铃数增加24.4%，产生超补偿现象。25%去叶处理在短时间内对棉花的株高和叶中蛋白质含量都没有影响，植株株型亦无大的变化，表明25%叶面积属于生长冗余范畴。

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％。