噪声污染

The mass matrix and the stiffness matrix of the elements are derived with energy method.

不必要的振动和噪声会降低结构的使用性能并污染环境，因此，结构的减振降噪问题一直是一个十分重要的课题。

Article 24 Units that cause environmental pollution and other public hazards shall incorporate the work of environmental protection into their plans and establish a responsibility system for environmental protection, and must adopt effective measures to prevent and control the pollution and harms caused to the environment by waste gas, waste water, waste residues, dust, malodorous gases, radioactive substances, noise, vibration and electromagnetic radiation generated in the course of production, construction or other activities.

第二十四条产生环境污染和其他公害的单位，必须把环境保护工作纳入计划，建立环境保护责任制度；采取有效措施，防治在生产建设或者其他活动中产生的废气、废水、废渣、粉尘、恶臭气体、放射性物质以及噪声、振动、电磁波辐射等对环境的污染和危害。

Adopt effective measures to prevent and control the pollution and harms caused to the environment by waste gas, waste water, waste residues, dust, malodorous gases, radioactive substances, noise, vibration and electromagnetic radiation generated in the course of production, construction or other activities.

采取有效措施，防治在生产建设或者其他活动中产生的废气、废水、废渣、粉尘、恶臭气体、放射性物质以及噪声、振动、电磁波辐射等对环境的污染和危害。

Units that cause environmental pollution and other public hazards shall incorporate the work of environmental protection into their plans and establish a responsibility system for environmental protection, and must adopt effective measures to prevent and control the pollution and harms caused to the environment by waste gas, waste water, waste residues, dust, malodorous gases, radioactive substances, noise, vibration and electromagnetic radiation generated in the course of production, construction or other activities.

第二十四条产生环境污染和其他公害的单位，必须把环境保护工作纳入计划，建立环境保护责任制度；采取有效措施，防治在生产建设或者其他活动中产生的废气、废水、废渣、粉尘、恶臭气体、放射性物质以及噪声、振动、电磁波辐射等对环境的污染和危害。

A robust wavelet threshold based on the minimax description length principle is derived in the ε-contaminated normal family for maximizing the entropy.

针对雷达信号中存在的不同于高斯分布的拖尾分布噪声，基于ε污染的正态分布族获得一种鲁棒阈值处理方法。

Numerical experiments show that the algorithm is robust to the attacks of the JPEG lossy compressing, cropping, superposing noise and resampling from the screen copy.

数值计算结果表明：该水印算法对JPEG有损压缩、剪切、噪声污染和重采样等攻击具有较强的鲁棒性。

Accordingly, the control of industrial noise pollution should cause our deep-felt attention.

因此，工业噪声污染的控制应引起我们深切的关注。

With the daily augmentation of the highway traffic milage、traffic volume and flow speed, the traffic noise pollution has grow more influential and extended larger range towards the normal life, work, study and rest environment of the residence along the highway.

每天增加的公路交通milage ，交通量和流动速度，交通噪声污染已经越来越有影响力，并扩大对更大范围的正常生活，工作，学习和休息环境，公路沿线居住。

It is an important content of construction ecological campus to raise sound environmental quality, through monitoring for the campus regional present situation of noise pollution and analysis, find out the major noise source that affects the area of campus, put forward the corresponding pollutive countermeasure of prevention, offer basis to found healthy quiet, comfortable ecological campus.

引 言 随着城市社会经济、交通运输的迅速发展，噪声污染问题日益严重，很多院校面临着为学生营造一个安静舒适、自然和谐的学习居住环境的压力。国内一些城市己颁布了生态型住宅小区建设管理办法及技术实施细则，对于高校园区，这一特殊的居住区，一方面要符合生态型住宅小区的

The noise pollution survey revealed a rather surprising and possibly amusing oldfashioned source of noise.

这个有关噪声污染的调查还揭示了一种出人意外而同时可能会引人发笑的老式噪音源。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。