查询词典 water pollution

Drainpipe net is an important and basic installation in modern cities and industrial estate, meanwhile it is a major project measure which could control water pollution and improve the environment.

中文摘要：排水管网是现代化城市和工业区不可缺少的一项重要基础设施，同时也是控制水污染、改善和保护环境的重要工程措施。

The establishment of unexpected events of the public system, through which dealing with the disposal of the various specific and reasonable to all aspects of decomposition to ensure that the interaction between the different segments of convergence and effective operation, is the basic security for government to handle sudden major water pollution incidents calmly.

通过应对突发性公共事件的制度建设，把各种应对处置的具体事务合理分解到各个环节中去，确保不同环节之间的相互衔接和有效运行，是实现政府从容应对重大突发性水污染时间的基本保障。

They have close relationship as the former may provide new ideas and approaches for the later, while the later may be the simulation for the former and gives it helps in degradation products identification and mechanism explanation. It is necessary to choose a suitable system, which has high potential of treating EDs and close relationship to the natural environment, to combine the researches in the two aspects. Our group has been engaged in researches on the photochemical properties and application to water pollution control of different ferric species including Fe -OH complexes, Fe -polycarboxylate complexes, Ferric oxides and Fe -humic acid complexes. Fe -oxalate complexes system has higher efficiency than the other ferric species systems in photooxidation and degradation of organic compounds. This thesis is focused on the photodegradation of nine EDs estradiol (E2), estrone (E1), 17α-ethynyl estradiol (EE2), diethylstilbestrol , bisphenol-A , 4-Nonylphenol , 4-Octylphenol , di-n-butyl phthalate , and di (2-ethylhexyl) phthalate .

因此从处理效率和环境化学意义两方面考虑，结合本课题组在不同铁形态（包括Fe-OH配合物、Fe-多羧酸配合物、Fe氧化物、Fe-腐殖酸配合物等）的光化学特性及其在水污染控制中的应用方面较系统的研究工作基础，本论文选择了四类共9种典型的内分泌干扰物（雌二醇（E2）、雌酮（E1）、17α-乙炔基雌二醇（EE2）己雌酚、双酚A、壬基酚、辛基酚、酞酸二丁酯和酞酸二乙基己基酯），研究了它们在Fe-草酸盐配合物体系中的光降解效果，推测其降解机理，探索环境内分泌干扰物光氧化处理的新体系，同时为预测其在环境中的光降解行为提供了依据。

The water pollution is very big to our banes, and its fluxion speed is also very quick, as long as have a place is polluted, these toxins will soon flow to another river to flow.

水污染是对我们的危害相当大的，而且它的流动速度也很快，只要有一个地方被污染了，这些毒素会很快的流到另一条河流。

This natural geographic location and specific climatic conditions, so that here the air, soil and water pollution were not any.

这天然的地理位置和特定的气候条件，使这里的空气、土壤和水质均无任何污染。

The choice of good parameter of water pollution model is a nodus in hydraulics.

水质模型的参数率定一直是水质预报的难点。

The water pollution and other factors affecting the structures of prey, will change the intrinsic natural growth rate and maximum population capacity, furthermore affecting the icefish population.

水域污染和其他破坏水域饵料生物种群结构的因素能导致银鱼的内禀自然增长率r值和最大种群数量Nmax发生变化，从而引起种群的数量变动。

Impervious surface is a character of urban areas. The ratio of imperviousness and total area becomes a significant urban ecological index in the research of urban hydrology, water pollution, urban vegetation mapping and so on.

不透水面是城市地区的典型特征，它与城市总用地面积的比值--不透水率作为一个重要的城市生态指数常出现于城市水文、水质、面源污染以及城市植被制图等研究中。

In fact,the consequence of water pollution is far more than this.

这个问题不像我们最初想象的那么复杂。

Optimal algorithm of combined nonlinear Hopfield network appears powerful validity in solving nonlinear planning, which includes nonlinear objective function, linear constrains and high-demension of decision-making variants, for its ability of nonlinear parallel computation. It is prominent among optimal algorithms because of its function of simply implement with electrocircuit hardware. Genetic algorithm is expressly suitable for optimal calculation regarding the planning of massive, highly nonlinear, inconsecutively differentiable and multiobjective function as well as objective function without analytical expression. However, it inclines to prematurity, as well as its limitation in ability of partial optimal search. Introducing the optimal algorithm of niche genetic simulated annealing to standard Genetic algorithm, can therefore improve the full-scale or partial search ability of Genetic algorithm effectively. It has a far-flung perspective in the field of systemic planning of water pollution control.

组合式非线性Hopfield网络优化算法所具有的非线性大规模并行计算能力在求解具有非线性目标函数、线性约束条件及高维决策变量的非线性规划问题方面显示出了强大的生命力，它易于电路硬件实现的功能更是在优化算法中独树一帜；遗传算法采用概率搜索技术，不受目标函数与约束条件的限制，特别适合大规模、高度非线性的不连续可微的多峰目标函数及无解析表达式的目标函数的规划问题的优化计算，但其存在容易早熟、局部寻优能力较差等缺点，本文在标准遗传算法中引入小生境技术及模拟退火算法有效地改善遗传算法的全局和局部搜索性能，提高了全局最优解的寻优质量，小生境遗传退火模拟优化算法在水污染控制系统规划中的应用前景极为广阔。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。