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Online since: September 2011
Authors: Zhi Gang Yin, Wei Li
China’s water conservancy and hydropower construction enterprises are obtaining more glorious achievements in international project market.
The progress of the study of the application of risk analysis in engineering projects seems a little slower than the theoretic research of risk management, especially for water conservancy projects.
Despite certain accomplishments obtained in the study of risk analysis of water conservancy projects since 1990s, it mainly relied on the establishment of concepts and qualitative researches, while quantitative researches often stopped in calculation of reliability.
The questionnaire used in this survey mainly includes two parts: Part 1: it mainly focuses on statistical description which investigates the gender, professional field, title and duration for engaging in this specialty, etc. in order to facilitate the comprehension of the main risk factors in general contracting of international hydropower projects from different occupations and different layers so as to reduce the subjective influence of the individual factors of the persons under investigation; Part 2: it is the main part of the survey.
Policy change Tables 1: Inspection of Index Internal Consistency Inspection Item Variable Alpha if Item Deleted Cronbachα Value Overall scale     0.934 Social political environment risk factors Custom risk 0.736 0.68 Infectious disease 0.733 Policy changes 0.486 War and civil strife 0.436 Legal risk 0.651 Natural environment risk factors Geographic environment 0.712 0.762 Water resources 0.665 Climate and temperature 0.673 Sandstorm 0.747 Natural force majeure 0.752 Geological conditions 0.792 Economic risk factors Tax 0.805 0.762 Exchange rate 0.733 Inflation 0.689 Financing 0.704 Settlement payment 0.719 Market 0.738 Subcontracting works 0.72 International conventions 0.712 FIDIC terms 0.731 Technical risk factors Contract technology 0.757 0.805 Design 0.744 Technical guarantee 0.79 Project acceptance 0.817 Project quality 0.767 Production safety 0.763 Equipment 0.808 Material supply 0.752 Quality earnest money 0.741 Human behaviors Personnel risk 0.843 0.87 Management 0.791
Online since: January 2012
Authors: Yong Zhang, Yan Jun Tang, Guo Wei Huang, Guo Xin Xue, Jun Xia
Experimental OCC fibers used in this study were provided by a domestic professional paper producer.
OCC fibers were torn into fragments of 15×15 mm2, then were soaked in deionized water for 24 hours, and defibrated in high concentration aquapulper (Adirondack machine company, USA) for 15min.
Before the experiment of cellulase enzyme treatment of OCC fibers, the OCC fibers were put into polyethylene plastic bag for water balance, and its pH was adjusted to 4.5 with sodium acetate and acetic acid.
The pulp were treatment in water bath.
After pretreatment of cellulase to the pulp, the structure of fiber became more porous which was in favor of water molecules dissolved.
Online since: September 2013
Authors: Yong Fa Zhou, Huai Fa Ma, Shu Feng Xu
Moving Grid Method for Simulating Crack Propagation Shufeng Xu1,a, Huaifa Ma2,b, Yongfa Zhou2,c 1 HydroChina Xibei Engineering Corporation, Xi’an 710065,China 2 State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100048, China agky2006sjs@163.com; bmahf@iwhr.com; cyongfa_zhou@163.com Keywords: moving grid method; crack propagation; numerical simulation; finite element method Abstract.
Thus, it is very close to the professional descriptive language adopted when describing finite element methods and issues.
Acknowledgments This work was financially supported by the National Natural Science Foundation of China (51079164), China Special Water Conservation Project (201201053, 201301057), and Research Special of China Institute of Water Resources and Hydropower Research ( KJ1242).
Online since: November 2012
Authors: Mei Xu
Figure 4 Direct digital control DDC 2 Intelligent control strategy for garbage incinerator system 2.1 Control strategy selection Incinerator control system, while not a great system, but it is a complex system, In addition to considering the incinerator's combustion process control superheated steam temperature, pressure, water level, feeder and grate speed, smoke control, furnace pressure and control the economizer outlet temperature control, flue gas oxygen content during storage of control and garbage leachate generated the formation of liquid polluted water and so on need to control and therefore require different control object to take different control strategy.
Because the garbage incineration boiler system is a complex system,you need to take under the control of different objects of different control strategies, flue gas treatment with liquid water treatment and pollution control requirements are very high, intelligent control strategies can be used.
Anhui education and research project-Electrical automation professional teaching team ; The basis of demonstration of the Provincial Electrical Engineering Internship Training Center.
Online since: March 2013
Authors: Qiu Ling Lang, Guang Jie Li, Miao Yang
Using Relational Model, all the basic geological investigation data can be reflected, such as engineering geological condition, geotechnical test data, in-situ test data, Analysis of water quality data, Static Triaxial test results, engineering project information, investigation information, engineering conclusions and recommendations, engineering geological information form.
User can not only make unified inquiries to all data according to the form of data sheet, but also make separate query to every data through database query subsystem, such as engineering geological condition, geotechnical test data, in situ test data, analysis of water quality data, static triaxial test results, engineering projects condition, investigation information, basic program, engineering conclusions and recommendations.
Fig.3 The query window of engineering geological conditions Fig.4 Data Editor Fig.5 The query window of water quality analysis data Fig.6 Graphics and display window Fig.7 Data output window Conclusions The establishment of this system realizes information sharing of the engineering geology exploration of the city.
Meanwhile, it is easy to operate so it is suitable for the non-computer professional engineers to use.
Online since: February 2008
Authors: Lan Xu, Jie Rong Yan, Cui Hong Zheng, Jia Mao Li, Chuan Gang Fan
The measurement of thermal shock was conducted by rapid taking ceramic specimens up to 1100 o C for 10 min, then plunging them into water (room temperature).
For MYZ, after 5 times thermal shock in the cycle of 1100 o C ⇔ 25o C (water), the surface of the specimens appeared without crack besides x=0.01 and 0.02 ones, which failed only by once shock for the former and twice shock for the later.
After 5 times thermal shock in the cycle of 1100 o C ⇔ 25o C (water), the surface of these MYZ specimens (x=0.03~0.05) appeared without crack.
Dean: Langes Handbook of Chemistry 15th Edition (McGraw-Hill Professional Publishing, New York 1998).
Online since: December 2014
Authors: Xing Hua Xie, Hui Sheng Zhou, Chun Yang Dai
Car latex matrix formula is: ammonium nitrate 6900kg, sodium nitrate 1000kg, water 1300kg; emulsifier 180 kg, oil 450kg, composite wax 50kg.
The water content of the matrix component of latex of 13%.
View another one of the same type mixed vehicle, if the rules of order when cleaning up more than expected, you must open the way to screw cleaning water valve, this accident was avoidable. 4, staff training content is not complete, pertinence. 5, business management deficiencies: latex matrix production and mixed vehicle use and other security management functions separated in mining field, mixed vehicles and vehicles with other mining stocks put; no interlock device calibration cycle.
Key questioning: the operator of the technological process, procedures, maintenance procedures, and disposal methods in case of iron ions, such as abnormal familiar with the situation. 2, the control system is updated every 4-5 years time, the control procedures provided by the licensor or refresh units, safety interlocks quarterly check once a year by a professional organization.3, in the relevant technical standards, the provisions in case of blockage site mixed emulsion explosive situation, measures should be targeted cleaning equipment, are not allowed to dredge blind barbarism.4, strengthening the site mixed vehicle technology identification, stereotypes, purchase management. 5, strengthen staff training, improve training targeted.
Online since: May 2012
Authors: Wen Mei Ji
Firstly, the article explains the geomantic concept from popular and professional angles.
They always were facing to waters with hills behind or leaning against hills and being close to water.
They even built a water gap garden in every ancient village.
Pure water effusing from mountains shuttles and circumfuses the settlement, and collects into the water gap at last.
The lake was more than 50 acres dug by people as the water gap.
Online since: December 2014
Authors: Jia Yin He, Gu Hua Li, Hao Lu, Jia Wei Yang, Liang Zhang, Ze Jiang Sun
(4)Superplasticizer:The polycarboxylate superplasticizer of Ke Shuai, admixture Limited corporation and water reduction rate of 25%, content of 0.66%
The experiment takes water-cement ratio is 0.6.And the method to choose the amount of water as follows: according to Professor Huizhen Lian, Mehta and Aitcin’s ideas for the preparation of HPC[5,6],the water consumption is determined of 170kg / m³through laboratory test .In addition,the concrete mixture’s slump is ensured to 200 ~ 220mm by adjusting the amount of reducing agent.
Add appropriate amount of water into both of the samples,mix up each other,and test the water consumption of cement mortar G0 and powder mortar Gi.
The method of calculating the equivalent coefficient and the volume of equivalent power is as follows:From the cement mortar water demand G1,we can calculate the cement’s per unit volume of water (is the density of cement).Though above calculation we can calculate the amount of water per unit volume of fly ash( is the Density of powder).Next,we depend volume’s equivalent coefficient as 1,the rest of the powder’s volume equivalent coefficients can be determined as ai = Ai/A0.
New York:McGraw-Hill Professional, 1900: 318-320
Online since: January 2015
Authors: Vladimir Korovkin, Luu Ba Thien
Petersburg Polytechnical University, 195251, Russia, Saint-Petersburg, Polytechnicheskaya, 29 athienlb93@wru.vn bkorovkin40@yandex.ru Keywords: seismic action, gravity drilling platform, a comprehensive settlement, the added mass of water, the ratio of seismicity, the stiffness coefficient of foundation.
Damped oscillations of the earth's shell, extending from the source of disturbance like the waves of the water falling on the subject.
For this scheme, the load is the weight of the board-shaped body of water attached to the structural elements, which are transmitted to the foundation block.
The second scheme for calculating an earthquake is related to the determination of the oscillation parameters columns [26].To account for fluctuations in the columns attached mass at the nodes of the column with the horizontal force of the added mass of water in the separate regions along the length of 10 m.
Cone Penetration Testing in Geotechnical Practice (1997)//Blackie Academic and Professional.
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