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Online since: October 2014
Authors: Li Fang Zhang
Compared with traditional irrigation methods, crop water use efficiency is 22.6%.
Information collection and distribution diagram The layout of piping take main drains and sub-drains water.
The working principle of sensor node For agricultural production, the most important environmental parameters include environmental temperature / humidity, light intensity, soil nutrient, water and the concentration of CO2, the scene at the same time image can help users more intuitive understanding of field information.
NET development server side functionality, the use of C + + component development component of the professional program.
The study shows that, to establish intelligent irrigation system based on Internet of Things technology can reduce the cost of the system cost reduction of 44.8%, compared with traditional irrigation methods, crop water use efficiency of 22.6%, compared with the similar foreign products.
Online since: May 2011
Authors: Chun Mei Mu, Bao Chen Liu, Zhi Kui Liu
Introduction CFG (Cement fly-ash gravel pile) pile is a certain bond strength of rigid pile which is mixed with gravel pile on the basis of amount of stone chips, fly ash and water mixing a small amount of cement.The aggregate is still gravel, with stone chips to improve the particle size distribution, fly ash to improve the workability of the mixture and amount of cement to decrease its activity, mixed with a certain small amount of cement to bond strength.
Carbonate of limestone distributed in Guilin is formed after laterization to high plastic clay with reddish brown, yellow brown, of which the pore is relatively large, and the high water content.
Compressive strength test specimen In the CFG pile construction site, the standard test block (150 × 150 × 150) is13 blocks in total made by the professionals of the pile after mixing random sample mixture.
The reason is that organic particles are adsorbed on the surface of cement particles and clay particles and hinder and delay the formation of hydration products of cement and cement hydrates and the role of clay particles, resulting in soil and water slurry can not pile the envelope.
Online since: November 2012
Authors: Xuan Min Li, Yong Hai Zhou, Shan Dan Zhou, Dan Feng
Introduction The oil depot is a professional warehouse of storing, transferring and supplying oil and petroleum products, a bond of coordinating processing and production of crude oil, oil transportation and supply, and base of the state and military for oil storage and supply.
We could cool the temperature by the irrigating water spray, choose tank coating correctly and reduce the temperature difference by taking measures of insulation to the oil tank.
If the oily sewage of the oil depot is poured into the surrounding rivers and ponds directly, of which the oil molecules will float on the water surface forming a large area of the film to destroy the function of self-purification of water bodies which will result in smelly black water, the death of microorganisms and animals because of hypocrisy, but also affect the life of the residents and production units of oil depot and its surrounding and the quality of production water.
Usually, the water quality treated by treatment facilities could achieve the standards generally.
l Whether there is the sound like running water in the tube usually.
Online since: February 2011
Authors: Jin Xian Yang
Coil system is supported in the non-magnetic base, and the base with the water level which has a level of 0.5° degrees resolution.
China Institute of Space Science Professional Committee of the 18th meeting space exploration(on).(2005) [3] Ma Yongqing.
Chinese Space Science Institute Professional Committee of the 12th meeting space exploration.(1999) [5] Jun-Sheng Wang, Hai-Bo Liu, Han Shoupeng.
Online since: November 2014
Authors: Li Meng Jia, Quan Chen
Table 1 Identification of Risks and Risk Factors in GT Coal Mine Production Activities Process Working Task Risks Risk Factors(Object’s Unsafe Conditions, People’s Unsafe Behaviors) Existing Control Measures Assessment of Existing Control Measures Cutting Coals Starting Shearer Mecha-nical Injury Isolation switch or operating handle failure causes accidental injury due to shearer isolation switches, each connecting bolt, cutter, each operating handle, etcunchecked before starting the shearer Before “Operating Procedures” starts, we should firstly put shearer isolation switch onto off position and then we must check all the components intact with the required water and oil The existing control measures basically meet the requirements, but lack of clear and systematic standard and guidelines for checking … …… …… …… …… …… Table 2 Identification of Equipment/Facility (Belt Conveyer) Risk and Risk Factors Components Failure Mode Risks (Possible Accidents) Causes of Failure
Working Task Risks Risk Factors Safe Operation 1 Starting shearer Spalling Coal wall surrounding shearer unchecked before starting shearer; coal crushers not tapped timely or due to operation workers’ improper operation; spalling injury caused by without using professional tools Changes of coal wall, seam thickness and top floor should be fully checked; operation workers should wear safety protection equipment; operation workers must firstly use professional tools to ensure wall tapping and roof sounding when stepping into operation site …… …… …… …… …… 5.2 Troubleshooting List of Equipment/Facility and Working Environment I have screened concerning information on the basis of GT coal mine risk information database and developed troubleshooting lists of different levels for each team according to the mine troubleshooting system, as shown in Table 4.
Online since: September 2013
Authors: Jiu Sheng Shi, Fei Peng, Bing Wen Zhang
The influence of excess air coefficient of boiler efficiency Jiusheng Shi1,a Fei Peng 2,b Bingwen Zhang2,C 1Shool of Energy and Power Engineering,Changchun Institute of Technology,Jilin,Changchun 130012,China 2Department of Heating,Gas,Supply,Ventilation and Ari Conditioning Professional,Northeast Dianli University,Jilin,Jilin 132011,China asjs1960@126.com,bpengfeiperfect108@hotmail.com,c292617331@qq.com Keywords: Excess air coefficient, combustion efficiency,furnace temperature, optimization Abstract: Excess air coefficient has an important impact on the combustion conditions of boiler and thermal efficiency, analysis shows that the furnace temperature and the combustion efficiency is the linear relation of one to one correspondence.
The actual operation increase the wall, header, steam-water pipe,Smoke wind pipe’s heat preservation to reduce the lossing. ash physical loss is generally not be considered.
Professional Circle8 (2007), 145-146
Online since: December 2012
Authors: Wei Mei Zhang, Qiu Mei Zhang
(See Figure1) The Subsystem for Technical Analysis.The technique of ecological furniture design requires complete compliance to the following principles:Take the environmental design of the furniture products into consideration when establishing the whole supply chain, by selecting more environmental friendly raw materials and process design;Take measurement to reduce the negative effect of the furniture design on the environment; Minimize the consumption of the raw material and the public utilities(such as water-supply and Electrical service), forbid the use of hazardous substance, improve the functionality and extend the useful life of the furniture products as much as possible, so as to reduce pollution and wastes significantly.
This includes the ecological environmental and professional health effect, waste recycling as well as the disposition of final waste. the evaluation of resource optimization.
On the other, this subsystem facilitate the establishment of the service platform for the furniture enterprise, contributing to the provision of professional services of information, technological, credit, intellectual property rights and training for the furniture enterprises.
Online since: February 2015
Authors: Bin Ni
Educational administration includes teaching management and conference management, among them, teaching management including teaching information publication (including professional settings and teaching programs, curriculum), teaching information inquiry, teaching materials maintenance (mainly provides network teaching platform); conference management, including notices of meetings, notice reply, notify management functions.
Fire institutions particularity mainly as follows: (1) in the professional courses, including fire mapping, fire water, fire and fire communications technology and other highly targeted specialized courses; (2) has a force in nature, require students to have good discipline and style; (3) as a special institution would involve sensitive, classified content, require faculty and students have a sense of confidentiality.
Online since: November 2012
Authors: Fan Jiang, Ai She Li, Yi Jun Wang, Yi Dan Hu
The emphasis was on the cultivation of students' comprehensive ability, including technical knowledge and reasoning ability, personal ability and professional ability, interpersonal skills, as well as in the social environment the ability to conceive, design, implement and operate of the system performance.
As the ball valve was widely used in such as water and gas pipelines, low pressure piping systems, it was common to be seen and used in students' daily life and was not unfamiliar to them.
Pay attention to practice, implement ‘teaching based on the project’ The implementation of ‘teaching based on project’ and ‘learning by doing’ emphasized on the cultivation of students' comprehensive ability, including technical knowledge and reasoning ability, professional competence, interpersonal communication ability and in the social environment the abilities to conceive, design, realize, operate of the system[4].
Online since: October 2018
Authors: T.Yu. Chernysheva, A.A. Zakharova, E.V. Telipenko, E.V. Molnina
A significant effect is expected from the introduction of technological processes for applying wear-resistant coatings to cutting tools, dies and molds, as well as wear, corrosion, heat-resistant and water-repellent coatings of machine parts.
Gulyaev, SCAD ТP VERTICAL "Equipment and tools for professionals / Metalworking" 2012, pp. 81-83 [12] The system of computer-aided design of technological processes VERTICAL.
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