Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: January 2012
Authors: Yang Han, Jiao Li, Xu Han
Comparatively speaking, this area is rich in land resource and water resource, whereas with skewness in water resource distribution, rich in east and lack in west, rich in north and lack in north.
(6) During the first 10 years, water space generally increased, except construction lands, other land types turned to water space in different amount, mainly from unutilized lands and grasslands.
Reduction of water space relatively fewer, mainly turned to grasslands and swamp.
Meanwhile, unutilized lands in different degree turned to other lands, mostly to water.
Grasslands reduced a lot, lands for urban and rural residents expanded a lot, forest and water increased, while water even more
Online since: September 2013
Authors: Hai Bo Li, Ya Qun Liu, Jun Gang Jiang, Qi Tao Pei
Finally, take Ada dam area of the western route project of South-to-North Water Transfer as an example, the results by numerical simulation were reliable through comparing the distribution rule of geostress field for the dam, which could provide important reference for stability of the design and construction of steep and narrow river valleys.
In this paper, different 3-D models of slope gradient in river valleys were established by geotechnical engineering professional software FLAC3D.
(a) Valley height is 300 m (b) Valley height is 400m Fig.3 Variation of maximum principal stress with vertical depth at different valley heights (a) q is 30° (b) q is 80° Fig.4 Vector maps of maximum principal stress at different slope gradients (q) Project Example The west route of South-to-North Water Transfer Project is composed of Ada hub of Yalong River and water lines.
Inversion analysis of three-dimensional geostress field in the second stage project of South-to-North Water Transfer, Applied Mechanics and Materials, 2011, vols(66-68): 901-906.
Online since: June 2011
Authors: You Quan Huang
The research of reservoir fluid-solid coupling theory, especially that multiphase fluid seepage caused by water injection and exploitation, the change of stress state and the coupling between the reservoir deformations.
Seepage theory and application about fluid flow of deformable saturated reservoir, seepage of fractured rock, fractured gas reservoir of low permeability, reservoir after fracturing, ground water, natural gas and coal reservoirs, low permeability reservoir, flow-solid-heat three coupled etc have been studied and examples simulated respectively by domestic scholars such as Dong Pingchuan etc[1], at the same time a number of interesting conclusions and understanding have been got.
Based on the porous medium equations of fluid-solid coupled equations[4], Zhang Guangming (2009), deducted the non-linear incremental finite element formulation corresponding, and adopted bonding units whose degree of freedom composed by the node displacement and pore pressure to simulate the expansion of cracks of pre-crack caused by water damage, on this basis, established finite element model of hydraulic fracturing wells[5].
Gas ratios equation: (9a) Oil ratios equation: (9b) Water ratios equation: (9c) There are seven unknown variables in the equation mentioned ,,,,,,, but some state equations and parametric equations must be supplied, except for solving volumetric strainthrough Stratum skeleton balance equation.
*About author: Youquan Huang, man, doctor, senior engineer, in1994 graduate institute of daqing oil wells project professional , mainly engaged in the research of petroleum engineering.
Online since: October 2012
Authors: Peng Huang, Ping Zhai, Jian She Liu, Yao Guang Guo, Xiao Yi Lou, Lei Xu, Shuang Jie Xu, Zhao Hui Wang, Dong Xue Xiao, Xue Wu Yuan
Introduction In recent years, the rivers, lakes and other receiving waters were seriously polluted by domestic sewage in rural areas, which had been of catholic concern worldwide [1].
While the sewage, containing large amounts of organic matters, nitrogen, phosphorus and other nutrients, was directly discharged into water bodies, it can result in the algae blooms to cause eutrophication and deterioration of quality of receiving water bodies, which had a serious influence on the ecological environment of rural areas, and posed a threat to the safety of drinking water for local residents [7].
Hence, the objective of the current work was to make a survey about rural sewage status and explore the rural sewage treatment systems suitable for Songjiang district, which was the key to understand the rural water pollution problems and the necessary measures to improve the rural water environment.
Current Rural Water Pollution in Songjiang District The rural sewage problems were more serious, and had not yet been fully effectively controlled so far in the water-source protection zones of Songjiang, which were shown concretely as follows.
Nevertheless, it was necessary to require professional and technical personnels.
Online since: January 2013
Authors: Xue Zhen Gan, Wan Zheng Ai
The crew's professional quality is basically reflected in crew's knowledge attainment and sailing experience, when ship approaches possible danger, the possibility of danger will be greatly reduced if crew uses good seamanship. 2.2 Effect of navigation environment For curved channel, channel conditions have greater effects on safe navigation.
Only curved channel meets the requirement of certain width and water depth, curved channel can be fit for navigation, and the fairway curvature radius can not be too small at the same time.
Figure 3 is a actually measured relationship curve between the ratio of water depth to draft (H/D) and relative accident k.
When ship sails in curved channel ship engine should be better in stand-by status; (3) Water depth and width and curvature of curved fairway should be complied with the requirement of navigation, or the channel must be dredged.
Safety Navigation in Inland-waters [M], Published by Dalian maritime University House, 1991:175-183(in Chinese)
Online since: November 2013
Authors: Yang Fei Huang
Water conservancy facilities: the status quo of the village has no sewage treatment facilities, rain sewage directly discharged into natural water bodies nearby.
Village planning effect analysis For different blocks of functions of industrial, commercial, residential, cultural, educational, administration, HangMin village planned reasonable layout and configuration of village road, building, water supply, water drainage, power supply, fire and other public facilities, in accordance with the principle of "underground before the ground, road before construction, supporting before development".
Water conservancy facilities: The water supply, sewage and household restroom transformation were basically completed.
The drainage and collection, liquefied gas, tap water pipe network were fundamental improved.
Villagers' cultural level and professional knowledge is limited, and for various reasons, design units lack positive, patient explanation and communication with the villagers, which cause the villagers from beginning to end don't understand what's going on.
Online since: March 2015
Authors: Hu Huang
More native folk custom activities, such as the Doumen water Sanzao marriage, arranged Mudfish, Crane Dance etc..
The mountain is the city's skeleton, water is the lifeblood of the city.
The overall goal in order to achieve "Xianshanloushui, Zhuhai city has water, the city there are mountains, mountains and rivers"
Zhuhai local festival activities of rich and colorful, the biannual Zhuhai air show is the only domestic flight performance with international professional Aerospace Exhibition, in the international prestigious, "beach music party" by the media as "Zhuhai Music Festival", one of the important activities in Guangdong Province, tied for the international cultural festival.
The formation of mountains, water, city into one of the unique city style.
Online since: January 2012
Authors: Ying Ning Hu, Jun Lin, Jie Wen Wu, Jing Sheng Liu, Tong Lin, Shuang Li
Ground source heat pump incubator adopts three-level distributed heating way, the heating condenser consists of three parts: 1) Main heating condenser, which includes copper tube on the top and the sides’ wall of incubator and fins, that is the first level heating condenser; 2) Fresh air preheated condenser, which is made up of copper tube between fan blades and egg rack, that is the second level heating condenser; 3) Thermal storage condenser, which consists of heat storage water tank and internal copper tube, which is the third level heating condenser.
Fig. 4 Distribution mode of finned condenser Fig. 3 Structure of finned condenser 1, 2, 3, 4 — finned condenser ;V1, V2, V3, V4 — three-way valve 2.3.2 The design of thermal storage condenser As shown in Fig.5, the function of thermal storage water tank is in order to extend the holding time of incubator.
The dimension of water tank is 2000 mm and 1600 mm and 70 mm, a thickness of 5 mm.
Fig.5 Thermal storage water tank 1 water tank,2 copper tube 2.4 The Design of Buried Tube Heat Exchanger The buried tube heat exchanger is the heat absorbing device of incubator; it is made up of the copper tube direct buried in soil.
Fig. 6 Buried tube scheme of evaporator 3 Experiments and Results Analysis 3.1 The Purpose of Experiments In order to test whether the effect of incubation and performances of incubator meet industry standards and requirements. 3.2 Experimental Materials The duck eggs are from a professional hatchery in Nanning Angie.
Online since: April 2014
Authors: Xiang Liu
The so-called “Negative Yin and embrace Yang” mean to make the living house with mountain and near the water as the ideal home.
So the mountain live by water, vegetation shows prosperous, beauty showed by cloud.”
So the mountain, water, flower and woods show a great significance in landscape architecture.
Such as: Bird's Nest, Water Cube and other Olympic museum.
Modern building professional design tends to be more user-friendly design, the program, will have human, natural, and other factors.
Online since: March 2020
Authors: Vishal S. Sharma, Munish Gupta, Gurraj Singh
Sharma3,c 1School of mechanical engineering, Lovely Professional University, Phagwara, India 2Mechanical Engineering Department, Chandigarh University, Chandigarh, India 3IP Engineering Department, Dr.
Moreover, the volume of the work related to the use of nano particle based coolants is much lesser as compared to the work with other water based coolants.
For the first variable (M1), the lubricant used was Rhenus FU60 water miscible synthetic ester based oil.
It was mixed in water with a fixed concentration of 5% by volume.
Yang, “The study on lubrication action with water vapor as coolant and lubricant in cutting ANSI 304 stainless steel,” Int.
Showing 2031 to 2040 of 3745 items