查询词典 water conservation

We derived an analytical expression of ion concentration distribution and the mathematical model of the induced polarization potential and the spontaneous potential for water bearing shaly sandstone from the conservation law of charge and the conservation law of matter.

由电荷守恒定律和物质守恒定律，推导出毛管中离子浓度分布的解析表达式，建立了描述含水泥质砂岩激发极化电位和自然电位的数学模型。

The first kind is 0-equation model. It only includes mass and momentum conservation equations. Great progresses have been made in improving this model. It has successfully been applied to many natural rivers with complicated boundary geometry. The second kind is κ-ε model. The κ equation and ε equation are needed, besides mass and momentum conservation equations. Many researchers have studied the depth-averaged mathematical models of turbulence in recent years. However, the models were used mostly in regular artificial canals or natural water areas with simple boundaries.

对于宽浅型河流，采用深度平均法进行流场计算时，用得较多的有两类模型：一类是不增加任何脉动量的偏微分方程的模型，这类模型已在适体坐标下运用得较多且较成功；另一类是κ-ε二方程模型，它是近几十年来广泛应用的一类湍流模型，并发展了许多具体的形式，但大多数只对顺直河道进行了研究，对弯曲较大的河道研究不多，本文运用适体坐标，采用正交交错网格及非正交交错网格，把此模型运用到了弯曲较大的河段及具有汇流的河段，取得了较大的成功。

In addition, there is a saving water closet is left in tanks on location with water, can be used to wash, convenience, and the water will be used for flushing water inflow that is suitable for environmental awareness and conservation, will be estimated to endure a smell unpleasant odour.

另外，还有一种节能坐厕，就是在水箱靠内侧的位置装有水龙头，方便后可用来洗手，而所用的水会流入水箱用作冲厕，即适合现在环保意识，又节约，可估计要忍受一会难闻的气味。

In this paper, taking one 1900t/h supercritical pressure once—through boiler installed in East boiler company as subject investigated, analyzing the structure and characteristic of unit, from the mechanism of units, based on the law of quality conservation, energy conservation and momentum conservation, having Lagrange fluid particle tracing idea in hydrodynamics field application in analyzing of unit operational characteristic, author build up the nonlinear distributed parameter general dynamic mathematical model of single-phase heating surface or diphase heating surface in the steam-water system for supercritical pressure once—through boiler, which is suitable numerical calculation and simulation for large scale disturbance and full working conditions change, and enough materializing distributed characteristic of thermodynamic parameter in process and time lag characteristic of energy transportation in tache. The transient responses curve of the system main variables under several disturbance are computed by Computer Simulation for the model, and theoretical analysis shows that the simulation results are reasonable.

本文以东方锅炉集团公司的一台1900 t /h超临界压力直流锅炉为研究对象，在分析机组结构和特性的基础上，从机组的工作机理出发，以质量、能量、动量守恒定律为依据，将流体力学领域中的Lagrange流体质点追踪思想用于机组运行特性的分析上，建立了适用于超临界压力直流锅炉汽水系统单相、双相受热面的非线性分布参数通用动态数学模型，该模型适合于大扰动全工况变化的数值仿真计算，充分体现了过程热力参数的分布特性和环节中能量输送过程的时滞特性，并对模型通过计算机仿真得出各种扰动下系统主要变量的响应曲线，从理论上分析了仿真结果的合理性。

During the establishment of sediment yield dynamic model at the watershed outlet, it was difficult for us to carry out dynamic monitoring of each impact factors in the whole basin, because it was a long time research and was in very large-scale watershed. Taking into account the interannual variability of sediment yield mainly affected by hydrological conditions of rainfall - runoff and underlaying surface changes caused by soil conservation measures, a combined influence factor which is related to surface runoff modulus and the implementation time of the water and soil conservation project was proposed for the first time. Furthermore, its specific expression was determined through dimensional analysis and non-linear regression multianalysis.

在流域输沙量动态模型的建立中，由于研究时段长、研究流域尺度大，对输沙量各影响因子进行全流域逐年动态监测十分困难，考虑输沙量的年际变化主要受降雨-径流水文条件和水土保持措施等土地管理活动的影响，首次提出与地表径流模数和治理时间相关的综合影响因子，并通过因次分析法和二元非线型回归法确定了具体的表达式。

The this design basis related standard, in the consideration energy conservation and under the comfortable request's premise, the refrigeration engine room supposes in underground one, selected has opened the advantage factory piston cold water unit, in the refrigeration engine room establishes the circulating water pump, the supplies water pump, to divide the water collector, the zeolite softener and so on supporting facility; The air-conditioning system uses the air blower serpentined to add the new atmosphere system, each has the corresponding new atmosphere unit, the indoor load mainly undertakes by the air blower serpentined.

本设计依据有关规范，在考虑节能和舒适性要求的前提下，制冷机房设于地下一层，选取了开利厂家活塞冷水机组，制冷机房内设置了循环水泵、补给水泵、分集水器、软水器等辅助设备；空调系统采用风机盘管加新风系统，每层都有相应的新风机组，室内负荷主要由风机盘管承担。

We took administrative districts at the county level as valuation units, estimated the current economic values of 7 ecosystem services (gas diversification, organism production output, and climate control conservation of water supply, soil formation and conservation, and environment purification, maintenance of organism culture and enter) for 6 biomes (forest, grassland, desert, farmland, wetland, and city).

以县级行政区为评价单元，核算了森林、草地、荒漠、农田、湿地和城市6大类和气体调节、水源涵养、土壤保持、环境净化、生物多样性维护、生物产品产出、文化娱乐7个方面的生态服务价值。

The reasons of water cycle being destroied are as follows: Because of the forest-steppe vegetation destroied and water and soil erosion, water resource conservation layer is destructed, and surface water and groundwater of mountainous areas is also damaged. Groundwater is damaged as a result of poor drainage of mining industry. The river channelization destroies surface water and wetland groundwater. The plain groundwater is damaged because of excessive exploitation. The decreasing of actual evaporization destructs precipitaion cycle.

发现了自然水循环各环节被破坏的原因：森林草原植被破坏和水土流失，破坏了水源涵养层，破坏了山区地表水和地下水；矿业不良排水破坏了山区地下水；河流渠道化破坏了地表水和湿地地下水；过量开采破坏了平原地下水；陆地实际蒸发量的减少，破坏了大气降水循环。

Critical natural processes are analyzed systematically at the national scale, including headwater conservation, soil erosion prevention, storm water management and flood control, desertification combating and biodiversity conservation.

国土尺 度生态安全格局通过对江河源区水源涵养、洪水调蓄、沙漠化防治、水土保持和生物多样性保护5个维护生态安全最关键的自然过程进行系统分析评价而划定。

General layout: General idea should focus on protecting urban water sources, restoring riverways, wetlands and groundwater, improving the water body function, strengthening water resources allocation and water function regions management. Based on existing water project structures, the generallayout follows as that urban water sources conservation on the upriver, wetland and groundwater restoration on mid-river and coastal wetland and estuarine eco-area restoration on the downriver, achieve the target that rivers and lakes 'connection, green bank, clean water, flowing river', then form aquaticecosystem protection and guarantee system.

以保护城市水源地为重点，以修复河道湿地、地下水和改善水体功能为核心，以强化水资源配置和水功能区管理为关键，基于现有的水利工程体系，在流域上游建立以城市饮用水水源地为主体的生态保护屏障，在流域中游建设以湖泊为点、河道为线、地下水为面的水生态修复系统，在流域下游构建以滨海湿地和入海河口为中心的生态恢复区，遏制水土流失，增强水源涵养，保护水功能区，实现河、湖&连通、绿岸、清水、流水&，进而形成防控结合的水生态环境保护与修复保障体系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。