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The principle and characteristics of grey model are studied in this paper. The dynamic model GM(1,1) in the form of differential equation are modeled and used to forecast the newspaper circulation.

本文讨论了灰色模型的机理和特点，建立了描述我国报纸发行系统发展规律的灰色动态模型，并据此对报纸发行量进行了预测。

The authors propose a new method that is easy to implement in engineering practice, i.e., to identify parameters of excitation model in the form of differential equation by means of nonlinear direct optimization algorithm.

提出了一种新的、工程中容易实现的方法，即利用非线性直接优化法辨识微分方程形式的励磁模型参数。

Many problems in science can be eventually presented in the form of partial differential equations. Although the methods used to analyze and calculate the PDEs have particular advantages,they also have some shortcomings that need to be improved.

工程中的许多问题可以归类于求解相应的偏微分方程，传统的分析方法在具有其特定优点的同时，也有值得改进的地方；由于高架桥和轨道系统的复杂性和传统分析方法自身的局限性，运用小波分析这一新的分析方法对其动力响应进行分析，已被越来越多的学者所关注。

In Zhong Shan's artworks,"Double images" art has man's appearance and figure as the subject, and expresses in the form of "diptych". The two works are placed side by side, and can be compared and observed, expressing the meaning of two in one and the relationship between concepts such as the internal and the external, ego and alter ego, real image and virtual image, sense and sensibility, spirit and material, double image and corresponding and so on. His art shows that the artist is reflecting the contemporary society from a special view angle and that the symbols bearing the weight of human social and historical culture and contemporary ideology occur in various changing characters, showing the colorful world of today.

在艺术家钟山的艺术中，"双相艺术"是指以人物等容貌、外形为表现主体，以双联成对形式这种新的阐释方式呈现，它们相互并列对置，可进行比较、审视，共同表达一体两面、内在与外在、本我与异我、实象与虚象、理性与感性、精神与物质、双像与对应等理念的关系，传达出艺术家以另类视角审视当代社会，体现那承载着人类社会和历史文化脉络及当代流行意识形态的符码，形形色色交织演绎在万千变化的形象上，展现着今天这个缤纷万象的世界。

Much of which is in the form of direct investment flowing into China.

其中很大一部分是以直接投资的形式流入中国。

In a long period of planned economy system of China, the management of government disburse was mainly in the form of obdurate purchasing and decentralization purchasing.

在我国长期实行的计划经济体制下，政府支出管理主要采用封闭、分散型采购方式。

Commercial law existed in the form of rule of custom or autonomy before disorganization of feudal natural economy.

在封建自然经济解体之前，商法只能以习惯法、商人自治法的形式存在。

However, it can also be displayed in the form of a plain list.

不过，它也可以显示在形式，一种朴素的名单。

And you can distill them in the form of a mission statement or a value system or a purpose statement

你就可以从行动计划，或价值体系，或目标计划

The MT carbonates formed several stages and with complex origin, special in dolomitization, MT carbonate was in the form of calcite in epigenetic stage; This is the preliminary research fruit.

MT的形成具有多期性和复杂成因，在白云岩化中也有分布，MT在后生白云岩中依旧以方解石形态存在，这是初步研究成果。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。