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Secondly, the principles in development of PE curriculum content resources involve openness, contraposition, cooperation each other, the combination of development and practice, and up-to-date spirits, etc.

第二，体育课程内容资源开发要遵循的原则主要有：开放性原则、针对性原则、合作互补原则、开发与利用相结合原则和时代性原则。

Those in contravention of basic principles as determined in the Constitution

违反宪法确定的基本原则的

In this paper, the principles, basic structure and control system of variable frequency air conditioner are introduced.

本文在阐述变频空调及其控制系统的基本结构与工作原理的基础上，重点对家用壁挂式变频空调器控制系统中的室外机控制器进行了设计。

It is important to understand that the Marketing Mix principles are controllable variables.

营销组合的市场变量是可控的，认识这一点非常重要。

It incarnates the basic principles of publicity,equality,serving and conveniency for people,and establishes a series of important sys...

公开条例体现了公开、平等、服务、便民的基本原则，确立了一系列重要制度。

It can be concluded from the above analysis that at the beginning of language, simple linguistic signs, coming from sound imitation, natural exclamation and morphological stimulation, took a strong feature of iconicity, while arbitrariness still existed to a little extent. With time going by, the primitives had to create more linguistic signs to meet their needs of survival and development, so that they arbitrarily related the sound patterns and concepts to conventionalize them as linguistic signs adopted in the whole society. During this period of time, arbitrariness played a more important role, while iconicity still worked as phenomena of phonaesthesia designate. With society developing, human beings found that it was not enough to create new signs at will, so they began to make use of some principles like compound, derivation, etc. to form new linguistic signs, either simple or complex. The linguistic signs formed during this period of time always took a better disguise to be iconic, while no one until now could defuse the contributions of arbitrariness of their formation. From the above investigations, it can be seen that arbitrariness and iconicity interact in the whole process of language development at the level of lexicon. If there were no arbitrariness, human language could not expand at the very beginning.

因此可做如下推论：在语言产生之初，简单语言符号的产生常常都是有理据的、象似的，但是仍不排除任意性的作用；后来有理据的词无法满足人们生存和发展的要求，人们开始任意地连接声音形象和概念，并约定俗成获得语言符号，此时任意性起主导作用，但是象似性在音义关系中对语言符号的产生起着不可否认的作用；随着社会的发展，人们发现这些词已经不再能满足需要，而创造更多的词也不是很可能，所以人们开始采用一些构词法来创造新的语言符号，此时产生的语言符号往往更具象似性，但其核心仍然是任意的。

Firstly, the thesis introduces the principles of PWM convertor simply, and advances the concept of SVPWM.

本论文首先简单介绍了PWM逆变器的原理，并随之提出空间电压矢量的概念。

We can imitate the principles of digital cameras in the scanner, plus a convex lens of the above.

我们可以模仿数码相机的原理，在扫描仪的上面加一只凸透镜。

The paper briefly introduces the characteristics, principles, structure and function of the electric control system of belt conveyer .

介绍皮带输送机电控系统的构成、特征、功能及原理。

In this paper, taking the downward continuation of potential field as an inverse problem of upward continuation, we obtain a convolution type linear integral equation for downward continuation. Making use of the orthogonal symmetry characteristic of Fourier transform matrix, and combining the principles of singular value decomposition of matrix and generalized inverse, we proposed a stable generalized inverse method for downward continuation of potential field, called wavenumber domain generalized inverse algorithm, which doesn't need the computation for inverse matrix. It resolves the instability of potential field downward continuation of large depth.

本文通过把位场向下延拓视为向上延拓的反问题，得到向下延拓的褶积型线性积分方程，再利用Fourier变换矩阵的正交对称特性，并结合矩阵的奇异值分解和广义逆原理，提出了一种稳定的不需要进行求逆运算的位场向下延拓广义逆方法——波数域广义逆算法，解决了位场大深度向下延拓的不稳定性问题。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。