Raplacing the spatial derivatives by spatial differences in the equation of the latter, we get the equation of the former.
将均匀杆自由纵振动运动方程中对空间的偏导数用差商代替，就得到一维单原子链晶格振动的运动方程。
The paper analyzes the economic spatial differences and the main factors which lead to the differences in Yiluo river basin.
文章着重分析了伊洛河流域经济空间分异及其形成的主导因素。
The results showed that there were significant spatial differences of Songhua river basin vegetation; NDVI of mountain was significantly higher than that of the central plain.
结果表明，松花江流域植被覆盖存在着显著的空间差异，山区NDVI值明显高于中部平原区。
These results indicate that impacts of advection and dispersion on DO vertical transport show spatial differences in the PRE, and influence the DO concentration in the water column.
这表明在珠江口不同区域，垂向的对流扩散作用对溶解氧垂向输运起不同作用，从而影响表底层溶解氧的浓度。
Men also show some advantage over women in other visuo-spatial tests such as judging the orientation of a line and visualising objects spatially, although these differences are not great.
男性在例如判断线方向和可视物体空间感等方面比女性也表现出一定的优势，但这些差异并不大。
There are differences in the internal implementation, but the usage of spatial types and functions is similar.
虽然在内部实现上有所差异，但是空间类型和函数的使用是类似的。
Here's another insight about dyslexia: men with the condition may have enhanced visual-spatial abilities, according to a study in the journal Learning and Individual Differences.
这里还有另一项关于难语症的研究结果：根据一项发表在《学习和个体差异》杂志上的研究，难语症患者的空间视觉能力会得到提高。
These brain differences also explain the fact that more men take up jobs that require good spatial skills, while more women (take up jobs that require good) speech skills.
这些大脑的差异也解释了更多的男子从事一些需要有良好的空间技能工作，而更多的女子则从事需要言语技能工作的现象。
Remote sensing images indicate the physical objects with different attributes and their distribution through pixel gray value differences and the level of spatial variation.
遥感图像通过像元灰度值的高低差异和空间变化来表示不同属性的地物目标及其分布情况。
This paper discussed on the functions and differences of map database and spatial database during the process of geographical information system construction.
该文阐述了在地理信息系统建设过程中，地图数据库、空间数据库的作用与差别。
On the other hand, there always exist differences between the concepts described by existing methods of describing spatial relations and spatial language often used by human.
另一方面，现有的空间关系描述方法所能够描述的概念与人们经常使用的空间语言之间总存在着一些差异。
The contrast research between English and Chinese prepositional structures is helpful to reveal the similarities and differences in spatial cognition of the two languages.
对于如何认识空间关系，不同的语言有不同的处理手段。
With the comprehensive evaluation system based on GIS, the regional differences and spatial dispositions were analyzed for cropping - livestock system in Yangtze delta plain.
利用基于GIS的农牧系统综合评价系统，对长江三角洲农牧系统结构的区域差异和空间布局变化进行了全面分析。
The spatial structure of the counties' economic differences is comparatively even and is relatively distributed.
县际经济差异的空间格局比较稳定，分布相对均衡。
Differences between the selected number of baseline points of the territorial sea and their spatial distribution have an important influence on the result of maritime boundary delimitation.
领海基点的选取数量及其空间点位分布的不同，对海域划界结果有着重要的影响。
The main purpose of this research is to study the regional differences and dynamic evolution of the size combination and spatial structure of the Changjiang River port system in Anhui Province.
并运用多元回归分析方法探讨了该港口体系规模组合与空间结构地域差异的成因机制；
There were no differences between the two groups in memory, thinking, attention span, organisational or spatial skills.
结果显示：被测试的两组女性在记忆力、思维、注意力持续时间、组织技能或空间方位感上的表现，并无差异。
As well as physical brain differences, they found that females with offspring were braver, could find food up to five times more quickly, and had better spatial ability than females without offspring.
除了脑结构上的差异，他们还发现有孕的雌性动物更勇敢，它们比未育动物快5倍找到食物，并有更好的空间感。
And the scientists found significant differences in pressure and spatial measures in deceptive statements compared with the truth.
通过比较虚假陈述和真实陈述的压力和空间测量结果，科学家们发现了显著的差异。
In using the method of contrastive linguistics, this thesis describes and contrasts the similarities and differences of Korean and Chinese spatial relations on the both-way.
本文运用对比描写语言学的方法，在对韩汉两种语言空间概念表达形式的异同进行双向描写、对比的基础上，借鉴认知·功能主义的观点对其异同进行解释。
We will explore new methods that combine spatial econometric techniques and methods used in the program evaluation literature such as difference-in-differences and propensity score matching methods.
我们将探索把空间经济学技术和那些被用在项目评估文学中的方法结合起来的新方法，如“异中求异”的方法和倾向匹配划分方法。
The space forms in different periods show the differences of their spatial sense.
建筑史上历代的一些空间形式展示了各个时代的不同空间观念。
The space forms in different periods show the differences of their spatial sense.
建筑史上历代的一些空间形式展示了各个时代的不同空间观念。
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