查询词典 an element of

Remote sensing for the detection of pest damage is an important element in forest management, This study describes the application of Landsat-5 Thematic Mapper digital data, using the Perceptron image analysis system, for the detection of western spruce budworm damage on Douglas fir stands near Cache Creek, British Columbia, Canada.

森林虫害监测是森林经营管理中的一个重要内容，为此作者利用陆地卫星第5号的主题成图仪数据，在加拿大不列颠哥伦比亚省卡奇河试验区对花旗松林被云杉茅卷蛾危害的状况进行了监测。

For a finite group G, an old theorem of Burnside asserts: each non-linear irreducible character of G must vanish on some element.

设G为有限群，古老的Burnside定理指出：G的每个非线性不可约特征标至少在一个共轭类上取零值。

The TERNS encloses the needle tip and protects the canula by means of an impermeable element made of thermoplastic elastomer.

燕鸥的针尖包围和保护所作出的热塑性弹性体的渗透元素手段导管。

On a typewriter, the movement of the type element to enable an alternate character or group of characters to be typed.

在打字机上，打字部件的一种移动控制，从而打印出此外的字符或字符组。

Chinese classical dance derived from traditional opera and martial arts culture, the combination of the natural heritage of the eyes is also an important element in this, even though we in the classical body charm lesson the teacher to guide us before, but in the dance world has not yet formed a specially trained eye courses, dance should take it seriously.

中国古典舞源自于戏曲艺术和武术文化的结合，自然也传承了眼神这一重要元素，虽然我们在上古典舞身韵课时老师给我们指导过，但在舞蹈界至今没有形成一堂专门训练眼神的课程，舞蹈界应予以重视。

When the researchers compared the human ultraconserved element to all the DNA sequences in the public database GenBank, the closest match was to DNA from the coelacanth -- an ancient fish thought to have gone extinct millions of years ago until a live specimen was caught in 1938 off the east coast of South Africa.

该鱼类一度被认为已经绝种，直到1938年在南非的东海岸又重新被发现。腔棘鱼是一种3亿6千万年海洋生物向陆地脊椎动物进化过程中至关重要的鱼类的后裔。虽然人类和腔棘鱼的演化从那时就分道扬镳，然后经过百万年的演化人类和腔棘鱼仍然共享着类似的重要基因片断。

Graphics, color, lighting, photography, music and design of commercial space areas are an important element, the correct and clever use of commercial space will shine with unlimited vitality!

图形、色彩、灯光、摄影、音乐等都是商业空间设计范畴的重要元素，正确且巧妙地运用搭配会使商业空间焕发出无限的生命力！

Based on the equilibrium equation of an arch element the cubic nonlinear dynamic model with second order is established and the nonlinear differential dynamic system without constant term is obtained through a transfer process of T=U+b. Hence three fixed points and the homoclinic orbits are found. The critical condition of the chaotic vibration of the elastic arch is given by using the method of Melnikov function. The numerical results of the stationary and chaotic motion are given and discussed.

首先利用拱的单元平衡方程建立了拱的二阶三次非线性动力学模型；然后通过变换使方程转化为不含常数项的非线性微分动力系统，并由此得到无扰动系统的3个不动点与同宿轨道；再用Melnikov函数法给出了发生混沌的临界条件；最后给出了该系统出现定常运动和混沌运动的数值结果。

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

The second part makes an innovative study of the soul of traditional Chinese graphics in the respect of "shape","essence", and "implication". The first element to be emphasized is "shape", which is mainly concerned with lineal designs and convolute designs in traditional graphics, the main two ethical factors employed in traditional Chinese design. The "shape" is a relatively complete and minute system. What is included in "essence" is to convey the effect of lucency and artistic conception in traditional plastic art, which embodies traditional Chinese philosophy and its aesthetic taste. The "implication" part makes a detailed analysis of the informative function of the particular ethical graphics from the perspective of disseminative theory. The third part is my application of the three elements in designing.

第二部分是本文的创新之处，分别从"形"、"神"、"意"三方面对传统图形的精髓进行探讨，"形"主要提取了传统造型元素中的线和具有中国民族风格的构成形式——回旋形进行着重分析，有较为详细而完整的结构体系；"神"主要结合中国的传统哲学和审美思想对中国传统造型所追求的空灵、意境进行论述，"意"主要从传播学的角度对传统图形所特有的民族信息传达功能进行分析研究。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷