查询词典 water-tight

The first part discusses about the effects of the five factors:temperature,relative air moisture,rate of frass sifting,density of larvae,fodder water percentage to growth speed and survival rate of older mealworm (Tenebrio molitor L.) larvae through rotational composite design of quadratic regression. Two models were established to describe the effects of the five factors. The models showed that percentage of fodder water is the major factor that has effect on the growing speed of T. molitor larvae,and fodder water is the major factor on death rate. The models also show that temperature on growth speed,temperature and fodder have important effects on death rate,and the significant test showed they have significant difference on 1% or 5% level. From the two models,by frequency analysis,we can get the optimizing rearing condition,in which the mealworm larvae overweight 10% per day,temperature is 25-26 ,frass sifting rate is once 2-4 days,density of larvae is 0.61-0.79 g/cm2,fodder water is 33.27%-39.71%. And the rearing condition,in which total death rate of T.

第一部分：采用五因素二次正交旋转组合设计，以黄粉虫幼虫饲养过程中饲养温度(X_1)相对湿度(X_2)、虫粪筛除频率(X_3)、饲养密度(X_4)以及饲料含水量(X_5)五因素为参试因素，考查它们对黄粉虫高龄幼虫的生长及存活的影响，建立了以黄粉虫幼虫增重率及死亡率为目标函数的回归模型，并进行了简化： Y_增=127.5079+18.6559x_5+2.7894x_3x_4-2.3854x_3x_5-3.0594x_1~2+1.8241x_3~2-3.8559x_5~2 Y_死=1.7459+0.4108x_1+0.0975x_2+0.9025x_4+0.3442x_5+0.0834x_1~2+0.3060x_4~2-0.2623x_5~2 分析结果表明：影响黄粉虫幼虫生长后期增重及死亡的主要因素分别为饲料含水量和饲养密度；饲料含水量和温度对黄粉虫增重有着重要的影响，饲养密度、温度、饲料含水量对黄粉虫的死亡有着重要的影响，其影响均达1％或5％显著水平；黄粉虫幼虫后期日增重率大于10％的饲养条件为：温度26～27℃、筛粪频率2～4天／次、饲养密度0.61～0.79g／cm~2、饲料含水量33.27～39.71％。

It is considered that the shortage of water resources and the friability of ecological environment are the common feature of coal mine areas in Western China,"three water" balance is the foundation of the assessment, and to control the impact of coal mine areas development over water resources within the capacity of regional water resources is the key to the sustainable development of the coal mine area.

研究认为西部煤矿区水资源匮乏和生态环境脆弱是共性，"三水"平衡是评价的基础，将矿区开发对水资源的影响限制在区域水资源承载力范围之内是煤矿区可持续发展的保证。

Industrial Automation Systems Division, including water pumping station frequency control system, constant pressure water supply control system, water treatment divisions and computer automatic control and information management systems; power plant coal feeder, give powder machines, pumps and fans, etc. The frequency control system, auxiliary power plant control system (including the coal handling, water and ash of the computer control system, etc.); metallurgical steel industry blast furnaces, converter gas Gasholder automatic monitoring systems, as well as petrochemical automatic monitoring systems.

工业自动控制系统包括水司的泵房变频控制系统、供水恒压控制系统、水司和水处理的计算机自动监控和信息化管理系统；电厂给煤机、给粉机、水泵和风机等的变频控制系统、电厂辅助车间程控系统（包括输煤、化水和出灰计算机程控系统等）；冶金钢铁行业的高炉、转炉煤气气柜自动监控系统以及石化的自动监控系统等。

At the same time ice crystal and graupel collect more supercooled rain water to reduce the amount of rain water. Graupel grows through the collection of ice crystal and graupel with supercooled rain water and riming of cloud water.

霰融化、霰在暖区碰并云滴成雨减少，使雨滴的初生减弱，而冰晶碰并过冷雨成霰、霰碰并过冷雨增加，也消耗了过冷雨水，抑制雨水增长。

The average depth of erosion on gritstone for cavitation water jets is 2 times as much as common water jets, and its mass erosion is 7 times as much as common water jets, and its diameter of erosion is 2.3 times as much as common water jets.

对于含有空泡的磨料射流，围压增加空化噪音减少，泵压增加空化噪音增加；有效靶距直径比增加，对花岗岩的冲蚀深度与冲蚀质量存在一最优有效靶距直径比；在最佳冲蚀时间下，较纯水空化射流工作效率提高2倍。

Main creative points of the thesis are as following:1. It is the first time to apply 2-D and 3-D turbulent model of the air-water two phases flow to the study on hydraulic properties of groyne. It makes description of the turbulent flow field to be possible precisely. This offers a more accurate method to determine the water surface in channel improvement.2. Based on the results of experiment and simulation for 3-D turbulent model of air-water two phases flow, a new formula to compute the height of damming is built.3. Based on the 2-D mode and the formula to compute the height of damming, the subdivision method of 2-D computation for water surface at upstream and downstream.

本文的创新工作主要是：首次将三维水气两相流紊流数学模型应用于丁坝水动力学特性研究，使丁坝附近流场和紊动场的精细描述成为可能，为航道整治中水面线确定提供了一个更为准确的方法；(2)基于水槽实验和三维水气两相流紊流数学模型数值模拟结果，建立了新的丁坝前奎水高度计算公式；(3)基于上述奎水高度计算公式和本文二维水面计算数学模型，首次提出了丁坝上下游二维水面分段计算方法。

Nowadays, water resource shortage and water. pollution facing the whole world have promoted all kinds of technologies study in water pollution control and water reuse. With the economic development, the life standard is improving and the habited circumstance is accelerating in our country.

中文题名一体化复合式膜生物反应器应用于小区污水回用中试研究副题名外文题名 Pilot experimental study on the integrated hybrid membrane bioreactor for domestic wastewater reuse in district 论文作者迟军导师王宝贞学科专业环境工程研究领域\研究方向学位级别博士学位授予单位哈尔滨工业大学学位授予日期2003 论文页码总数148页关键词中空纤维膜膜生物反应器污水处理馆藏号BSLW /2003 /X703 /46 世界范围的水环境污染和水资源短缺，使人类积极地寻求各种水污染控制技术及水回用技术。

Because mineral water contain many mineral, and mineral is the important material for composing human apparatus, adjusting physics, maintaining health. So health protection mineral water is the best choices for living drink. Mineral water is a trend comparing with common water.

因为矿泉水中含有多种矿物质，而矿物质又是构成人体组织、调节生理和维持人体健康的重要物质，所以具有保健功能的矿泉水是人们日常生活饮用之首选，与维持人类机体所需的普通水相比，大众化矿泉水消耗已成为一种必然趋势。

The system has changed from previous high-water tanks and pumps for water supply mode, get rid of the shortcomings of the water supply instability, is a safe and reliable, fast and stability, energy saving, convenient maintenance and management of water supply control systems.

该系统改变了以往由高位水箱和工频泵供水的模式，摒弃了供水不稳定的缺点，是一种安全可靠、快速稳定、节能、维护和管理方便的供水控制系统。

This article introduced the general situation of the domestic and international ice jam research and the necessity of the water level research firstly. In succession, discussed the formation condition and the formation process of the ice cover in detail, the ice jam formation mechanism and the general regulation of development in the space, the water level variety process that caused by ice jam, factors that influence the ice jam water level: the river power factor, the thermodynamic energy factor, the water current dynamical factor and artificial factor etc..

文章首先介绍了国内外冰情研究的概况以及进行冰塞水位研究的必要性，接着，详细论述了冰盖的形成条件及形成过程，冰塞的形成机理及冰塞在空间发展的一般规律，由冰塞所引起的水位变化过程，影响冰塞水位的河势因素、热力因素、水流动力因素及人为因素等。

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