They then cascaded the negative index medium with a positive refractive index medium so that the complete nanostructure behaved as one with an index of refraction of zero.
他们将负折射率材料和正折射率材料级联起来成功实现了零折射率行为的纳米结构。
Maybe letting them go to zero if they had to be positive or maybe by making them go to infinity.
当它为正数时，让它趋于零，或者趋于无穷大。
A net present value of greater than zero indicates that the project has positive net economic benefit to the company.
净现值大于零说明项目对公司有正的净经济效益。
But, if a field is fairly simple, you should be able to get some general feeling for whether your answer should be positive, negative or zero just by thinking about which way is my flow going.
但如果流速场很简单的话，大家理应有一种直觉，可以感受出来，结果应该为正为负，还是为零。
Respondents were asked how they would rate their lives on a scale from zero (worst possible) to 10 (best possible), as well as answering a series of questions on positive or negative emotions.
受访者被问到他们将如何给自己的生活评分：量表从0分(可能最糟糕的生活)到10分(可能最美好的生活)；同时还需要回答一系列关于积极或消极情绪的问题。
The anonymous commenter-whether on a random blog or a traditional news site - would have to work hard even to achieve zero credibility, much less move into positive territory. (More on that below.)
匿名的评论者——无论在随便一个什么博客上，还是在传统的新闻网站上——要让自己的可信度达到零都还要下很大的功夫，更不用说达到正值。
When the product of value and weight is positive, it contributes to pushing the sum above zero.
当值与权重的乘积是正的时，它有助于促使和大于0。
And so this number can be larger than zero — - it can be positive — 0 it can be equal to zero, 0 it can also be smaller than zero.
因此这个数字可以比0大-，是个正数-，可以等于，也可以小于。
In Vimscript, as in c, only the numeric value zero is false in a Boolean context; any non-zero numeric value-whether positive or negative-is considered true.
和c一样，在Vimscript中，对于布尔值来说，只有数值0为假；任何非0数值—不管是正数还是负数—都为真。
NaN is also treated like zero, and positive and negative zero should return positive and negative zero.
NaN也被当作0，正0和负0应该返回正0和负0。
There is a category of "zero-positive" people, with autism or severe Asperger's, who lack empathy but show no tendency to unkindness.
这其中有一类型的人群叫做“零-积极”人群，包括患有自闭症和阿斯伯格症的人。他们缺乏同情心，但是并不残忍邪恶。
In India, real rates are close to zero-still far below the estimated neutral rate of 6%. Only in Brazil are real rates positive and above the neutral rate.
在印度，真实利率接近零，还是远低于基准利率的6%，只有在巴西，真实利率为正，而且高于基准利率。
In other words, t surrounding ds has to be greater than zero, and of course temperature is always positive.
换句话说这就意味着，环境温度T乘以dS必须大于零，当然环境温度t是正的。
Manipulating the values positive and negative infinity, especially if generating such values by dividing by zero.
操作正和负无穷大，尤其是如果除以零得到这样的值。
So zero is supposed to be neither positive nor negative, and here I am just simplifying and saying it's actually going to be negative.
所以0不是一个正数，也不是负数，在这里我只是简单地，说明它实际上会是负数。
To zero: Maradona faces the press after it was revealed he had tested positive for the use of banned drug.
一无所有：当由于使用违禁药物而检查出呈阳性被揭露后，马拉多纳面对记者。
Integer type that holds negative or positive Numbers, including zero.
保存负数、正数或零的整型。
Positive temperature coefficient (PTC) thermistor and triple frequency harmonic filter can reduce zero sequence voltage when a nonlinear resistance is used to prevent ferroresonance.
在非线性电阻消谐方式下，正温度系数(PTC)热敏电阻和三次谐波滤波器可以较好地解决零序电压偏高的问题。
IEEE 754 also defines both positive and negative zeros. in regular math, zero is neither positive nor negative.
IEEE 754还定义了正0和负0(在一般的数学中，0是不分正负的，但在计算机数学中，它们可以是正的，也可以是负的)。
Another kind is genetic metaphysics, based on in the source-evolution-differentiate, it is related with the zero between negative and positive number.
另一种是基于本原、生衍两分之基础上的发生论形而上学，它与在正负数之间的零相关。
In typical six-phase transmission system, half positive sequence, half zero sequence and half negative sequence fault components are independent of the variance of system impedance.
在典型的六相输电系统中，半正序、半零序和半负序故障分量不受系统阻抗变化的影响。
These three local minima differ by virtue of whether the resulting vacuum energy is positive, negative or zero.
我们可以使用真空能量是正、负或零，来区分这三个局部最小值。
Compared with the previous methods, the Newton-Raphson method is used not only for solving the positive equation, but also the negative and zero sequence equations.
与已有方法相比较，所提方法不仅在正序方程中，而且也在负序和零序方程中采用牛顿法修正方程。
Compares its two arguments for order. Returns a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.
比较用来排序的两个参数。根据第一个参数小于、等于或大于第二个参数分别返回负整数、零或正整数。
The zero sequence component and the positive sequence component equations of transmission lines are derived on the basis of telegraph equations.
运用电报方程推导出三线-地耦合传输线零序分量和正序分量传输线方程。
Based on the symmetry component theory, a method of the motor protection is presented by measuring positive, negative and zero sequence current component.
基于对称分量法理论，提出了基于检测正序、负序、零序电流分量的电动机保护方法。
The lines of zero angular momentum separate the flow into two areas of negative and two areas of positive angular momentum .
零角动量的曲线把物质的流动分成两个正角动量区和两个负角动量区。
What is important to remember is that the formulas represent neutral compounds where the positive and negative charges add to zero.
重要的是记住分子式是代表中性化合物，正负电荷加和为零。
Following we will discuss the exhibition forms of early diagnosis that is the positive value of early diagnosis, the zero value of early diagnosis and the negative value of early diagnosis.
早期诊断的价值有三种表现形态：早期诊断的正价值、早期诊断的零价值和早期诊断的负价值。
The mathematical model presented in this paper can also be used in the regrinding of gear hobs with zero rake Angle and positive rake Angle for error calculation and revision.
文中的数学模型亦可用于零前角及正前角齿轮滚刀重磨后的齿形误差计算及修正。
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