bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimization of Removal Conditions of Soluble Reactive Dyes from Aqueous Solutions by Bacillus sp. Biomass
Authors: Fang Gai Xia , Chen Li Hua
Published: January 2012

The optimal conditions of by the culture of Bacillus sp.were examined, using beer wastewater to replace glucose as carbon source and energy source in the culture medium. Results showed that the COD concentration in beer wastewater favorable for the growth of the Bacillus sp.was 5000 mg•L-1, and inoculum size of 5%(v/v), 30◦C, initial pH 7.0 and shaking speed of 150 r•min-1, under the optimal culture conditions, the Bacillus sp. biomass was effective in flocculating some soluble reactive dyes in aqueous solution, reactive Light-Yellow K-4G and reactive Turquoise Blue KN-G with a decolorization efficiency of 93.8 and 95.5%, respectively, using 20 mL of the culture medium in 500 mL of 100 mg•L-1 dye solution.
Research on Hardening Mechanism of Cement-Emulsified Asphalt-Epoxy Resin
Authors: Shen Fan , Huang Shao Long , Sun Zheng , Ding Qing Jun
Published: January 2012

This article researched the cementation and hardening mechanisms of cement asphalt emulsion and waterborne epoxy mortar by using the XRD, and heat of hydration testing methods. The results of this study show that the mixture of cement with epoxy and cement- asphalt-epoxy are endothermic reaction. There are occurring endothermic reactions between cement with epoxy. The waterborne epoxy resin and basic structure unit of ettringite [Ca3Al(OH)6•12H2O] were reacted and formed Ca-complex at earlier period of hydration.
Retaining Structure Design and Residential Energy-Saving Research
Authors: Huang Jun Zhou , Wang Jian Hua
Published: January 2012

Based on the theories, , and we can improve , the heat transfer resistance of retaining structure, or reduce ,the heat transfer coefficient, through the heat insulation design of outer wall, roof, ground, the door, and outer window and the thermal bridge, and finally realize the building energy conservation goals. Residential energy consumption is a important factor of China's energy saving. Exterior wall, roof, ground, the door, the external window and thermal bridge is the key parts of energy consumption of residential building.
Synthesis and Characterization of Poly(butylenes succinate) with Control Different End-Group
Authors: Cui Chun Na , Huang Ji Tao
Published: January 2012

Poly (butylenes succinate) (PBS) was synthesized by using1, 4-butanediol and succinate as starting material, titanic acid ester and acetate as catalyst, and tried to improve PBS by changing end-group to carboxyl, hydroxyl and chlorine. The results of GPC showed, molecular weight of four kinds of polymer was all beyond seventy thousand; chemical structure of the polymer was measured by FTIR and nitrogen/sulfur/chlorine elementary analyzer; PBS controlled end-group had better thermal properties by DSC and TG; different end-group had influenced mechanical properties; and biodegradability experiment results showed biodegradable speed of PBS can be controlled by changing their end-group.
Preparation of Porous ZnO Film by Zinc Oxalate Recurrence Method
Authors: He Yong Qiang , Huang Rong Gang , Liu Yu , Xing Fu Bao
Published: January 2012

This paper presents a method called zinc oxalate (ZnC2O4) recurrence method to prepare porous zinc oxide (ZnO) films via templating with polystyrene (PS) spheres. Effects of calcination time and temperature, concentration of ZnC2O4 in precursor solution on ZnO films were studied. Optimal synthetic conditions and structural features of ZnO films were investigated by DTA, XRD and SEM. Experimental results show that porous ZnO films can be easily prepared by zinc oxalate recurrence methods.
The Effect of Ultrasonic Etching on the Structure of Stabilized PAN Fibers
Authors: Hu Xiu Ying , Wang Cheng Guo , Wang Qi Fen , Lu Wen Bo , Yu Mei Jie
Published: January 2012

The effect of ultrasonic etching on the crystalline structure, fibrillar structure, skin-core structure of stabilized PAN fibers was studied by XRD and SEM. It has been found various degree of decrease occurs in the crystallite size and crystallinity of fibers heated at different temperatures after ultrasonic etching. Fibrillar structure of fibers heated at 195°C~245°C appear after ultrasonic etching in 90wt% DMSO solution for 6h. When the stabilization temperature is over 245°C, no separated fibrils or macrofibrils are found. When stabilized fibers were etched in pure DMSO, skin-core morphology was observed for the fibers heated at 235°C~265°C. The method of ultrasonic etching using pure DMSO confirms the structural difference between the skin and the core, also makes the difference visual.
Effects of SiC Addition on the Properties of MgO-Based Castables
Authors: Wei Jun Cong , Tu Jun Bo
Published: January 2012

The effects of SiC addition on physical properties and slag resistance of MgO-based castables were investigated using magnesia as the main raw and silica micropowder as binder. The result revealed that with increasing SiC addition, dried strength decreased, medium and high temperature strength first increased and then decreased and reached a maximum at 3% SiC addition. The hot modulus of rupture (HMOR) of the materials maximized at 3% SiC addition. The slag penetration resistance of the castables was improved while resistance to slag attack was deteriorated with the increase in SiC addition. The materials exhibited optimum slag resistance at 3% SiC additions.
Research on Dielectric Spectrum Characteristics of Nano Fe3O4 Modified LDPE
Authors: Zhang Dong , Song Wei , Sun Zhi , Han Bai , Lei Qing Quan
Published: January 2012

Fe3O4 ferrite nanoparticles used for preparation of PE composite have been prepared by chemical co-precipitation method and modified by different methods. And the nanoFe3O4/LDPE composite materials with different mass percentage concentration of 0.25 to 1 percent were prepared by melt blending. The relationship of permittivity and dissipation factors dependence of frequency were investigated by Broadband Dielectric Spectrometer made by novo-control company. Through these measurements we got the conclusion that both the doping of Fe3O4 and magnetization have effect on permittivity and dissipation factors, and the effect relates to the doping methods and quality percentage content.
Preparation and Characterization of MicroPCMsContaining Paraffin
Authors: Huang Dian Wu , Lian Yuan , Wang Hong Mei
Published: January 2012

Microcapsules containing paraffin phase change materials with MMA-MAA copolymer shell were synthesised by in situ polymerization. The Structure, diameter, encapsulation ratio of paraffin and thermal properties of the prepared microcapsules were investigated by using FTIR, ELS particle size analyzer, differential scanning calorimeter (DSC), thermogravimetic analysis (TGA). This encapsulated phase change paraffin could have good potential for energy storage.
Theory Analysis of Biomass Molding Mould
Authors: Wang Shu Yang , Wang Zi Man , Zuo Guang Xin , Zhang Wan Ruo , Zhao Jian
Published: January 2012

The biomass molding is influenced by many factors such as moisture, temperature, Poisson ratio, particle size, length-radius ratio etc. This paper armed to learn the influence of pressures on the biomass molding with different diameter and mainly researched the forces the biomass undergone, including the relationships of molding pressure and the length-radius ratio and that molding pressure and the density. First the material molding process was analyzed and the infinitesimal isobaric model that is pressure vessel model was established. Then this paper analyzed the model and derived these specific mathematics relationships. According to the formulas, this paper used Matlab to program, handled the datum and got the relationship images of the molding pressure and the length-radius ratio and that the molding pressure and the density. Thus it was learned that in plastic deformation area, the pressure and mould radius have the linear relationship while in the shaping area, they have the hyperbolic relationship and the pressure and the length-radius ratio have the linear relationship; Molding density changes with pressure and radius in index.
Research on Contact Deformation and Influencing Factor of Ball Screw
Authors: Wang Yu Sheng , Wang Ming Ming , Yan Ming
Published: January 2012

It was calculated contact deformation of ball screw respectively by hertz theory and finite element method, and analyzed the influencing factors. It is found that as the gradually increasing of ball screw load, axial deformation is also increasing gradually,and its deformation gradually smooths. As the increasing of lead angle, deformation of ball screw is gradually decreasing. As the increasing of contact angle, deformation of ball screw is gradually decreasing. Finite element calculated results are in good agreement with the theoretical results,and the error is gradually increasing with the increase of the nut load.The reason is that turning of ball is not fixed in the roller path,and along with the increase of the load, the contact point position is constantly changing among ball,leading screaw and nut.
Analysis of the Stability of POY Filament Structure and Properties Spun by WINGS System
Authors: Yang Bin , Yan Zhi Yong , Xue Yuan
Published: January 2012

Comparing the crystal orientation of the structure, tensile properties, boiling water shrinkage rate between difference filament rolls in the same spinning position spun by WINGS POY system and tradition ACW POY system, it is found that there are differences in orientation degree, crystallinity, tensile strength, elongation at break, initial modulus and boiling water shrinkage rate between difference filament rolls in the same spinning position. Coefficient of variation of the experimental values of WINGS POY system is lower than traditional ACW POY system.
Effect of Carbon Nanotube on Physical and Ablative Properties of Silicone Elastomer
Authors: Li Dong , Wu Shu Xin , Chen Zhu , Li Yang , Wang Ji Gui
Published: January 2012

The effect of carbon nanotube on the physical and anti-ablative properties of silicone rubber was studied. Carbon nanotube was blended with addition cured silicone resin at various fillers loading levels. The tensile strength, elongation at break and ablative rate of each sample was measured.
Research on Effects of Land Use/Cover Change on Soil Erosion
Authors: Zhu Lian Qi , Zhu Wen Bo
Published: January 2012

This paper studied the impacts of land use/cover change on soil erosion in Fujian mountainous areas on the basis of analysis on long period inspection and experimental materials in Jianou Niu Kenglong Experimental Station and the Provincial Soil and Water Conservation Station, researched soil erosion mechanism of mountain grassland ecosystem, and different soil erosion modulus under different land use and land cover types. Through analysis, we have got the results that the coefficient of runoff has minus linear relation with grassland coverage, and the modulus of soil erosion has index relation with grassland coverage.
Transient Power Quality Disturbances Identification and Classification Using Wavelet and Support Vector Machines
Authors: Sun Wen Sheng , Xiao Xiang Ning , Tao Shun , Wang Jian
Published: January 2012

Based on wavelet transform and support vector machines, a method of recognition and classification of transient power quality disturbance is presented. Using wavelet transform time-frequency localization characteristics, according to the principle of modulus maxima, realize the automatic detection positioning. After multi-resolution signal decomposition of PQ disturbances, multi-scale information in frequency domain and time domain of the signal can be extracted as the characteristic vectors. After choose and optimization of the eigenvectors based on the method of F-score, support vector machines are used to classify these eigenvectors of power quality disturbances. Effectiveness of the proposed method is verified through Matlab simulation.
A New Real-Time Gas Well Productivity Evaluating Method
Authors: Tian Leng , Shen Ying Hao , Wang Shao Jun , He Shun Li
Published: January 2012

With the continuous development, the gas well productivity will decrease. The deliverability test can be used to evaluate gas well productivity, but this method always needs long test which will affect daily production seriously, especially for low permeability gas wells, also there always isn’t enough data in the field. Aiming at this problem, this article presents a new real time method to get the gas well productivity. This new method avoids deliverability test and only needs daily production and wellhead pressure data, so the analysis process is easy and this method has strong practicality. It is proved that this new method works well in the field case.
Study on the Application of Regional Risk Assessment of Lightning in Electrical Equipment Insulation
Authors: Zeng Xiang Zhi , Xu Chao Fang , Liu Gang
Published: January 2012

With the rapid development of urbanization and the power system, the damages for the power system and electrical equipments which due to lighting strike are increasing. As the distributions of lighting activity are regional and random, the requirements for electrical and electronic equipment, voltage and insulation level are varied from lighting activity in different regions. This paper adopts the Lightning Location Data on the Pearl River Delta in the last 10 years, and uses the method of probability statistics to analyze the regional ground flash density, the probability of lightning strike accident, the damages of the lightning strikes accidents and other risk factors. It takes the topography, regional features, population density and other factors into account, and uses the weighted scores to establish the risk assessment model for the lightning strikes, programs to achieve the automatic calculation in allusion to the risk of lightning strikes in different types of buildings and insulation levels of the electrical and electronic equipment, and assess the risk of lightning strikes on the electrical and electronic equipment. And based on the risk assessment result, it incorporates the installation location, characteristics, importance and other factors to study the electronic equipment withstand voltage and insulation level.
Reseach on Control Strategy Based on p-q-r Theory for Four-Leg Grid-Connected Inverter
Authors: Chen Hong Bing , Zhang Xing
Published: January 2012

The mathematical model for three-phase four-leg grid-connected inverter is modeled by the simplified p-q-r theory. The control strategy is proposed based on the characteristic of controlled variables. PI algorithm is adopted for variables of p axis and q axis, and PR algorithm is adopted for variable of r axis. The full design and analysis of the proposed control algorithms are given in this paper. Simulation results and experimental result show that quality of four-leg grid-connected inverter output current is higher, and effectiveness of the proposed control strategies is validated by all results.
Application of the GRA and SVM for Forecast of China Grain Production
Authors: Shi Jin Fa , Jiao He Jun
Published: January 2012

This paper proposes a new method: GRA-SVM model which is composed of GRA and SVM to predict grain production through annual production data. In view of the fact that the complexity and incomplete information of grain production system, the primary factors influencing the grain production is decided on the basis of the grey ralational analysis of the grain producing system, then, the grey ralational analysis and support vector machine model is established by the principle of the support vection machine regression. The application case proved that the proposed method can improve the feasibility of the program in grain production, and it is suitable for on-line grain production control for food system.
The Application of One-Cycle Control in Wind Power Generation
Authors: Wang Yun Liang , Zhao Jian
Published: January 2012

With the increasing development of sustainable energy, the technology of wind power generation becomes more and more mature. This paper introduces the application of one-cycle control in the converter section of the wind power generation. The performance of the whole system can be improved. A one-cycle control principle of derivation is conducted, A simulation to the one-cycle control by MATLAB software shows high power factor and quick system dynamic response.
Design and Implementation of Flexible Control Strategy for Stand Alone Wind Generator System
Authors: Hua Chih Chiang , Chuang Chih Wei , Liao Yu Chi
Published: January 2012

This paper presents the design and implementation of the flexible control strategy for stand alone wind generator system controlled by a digital signal processor. The system is composed of a wind generator, a step-up dc/dc converter and battery energy storage system (BESS). The wind generator is the main power source of the system, and the BESS is used for energy storage and power compensation for the lack of stability of the wind power. Since the output power of wind generator varies with the change of wind speed, a flexible control strategy is used to determine the system working state and the operating mode of BESS. In charging mode, the battery is charged by multi-stage current charging method with maximum power point tracking (MPPT) algorithm to raise the charging efficiency and completely employ the finite power. Fuzzy logic control algorithm is used to improve the transient response when the battery discharges in discharging mode. Finally, a 100 W power converter system is constructed and the performance is verified.
River Water and Ground Source Heat Pump Integrated Application of Energy-Saving Technology
Authors: Jin Ning , Li Sheng Fei
Published: January 2012

Along with our country economic development fast development, construction energy consumption large scale growth, constructs the energy consumption to occupy the national energy consumption about 25%, therefore the energy consumption question becomes the national economy society to continue the healthy development now the subject matter. The development renewable energy source resources, reduce the energy consumption vigorously, slows down the global climate warming, protects the ecological environment, advances the human society sustainable development together, has become now the social development significant strategic plan. This article take the river water source and the place source heat pump as the example, the use river water source and the place source heat pump integration application energy conservation technology to the construction heating, the refrigeration. Through to this integrative system's analysis, obtained the river water source and the place source heat pump integration application energy conservation and the environmental protection performance.
Study on the Influence of Low Carbon Economy to Export of the Forest Products
Authors: Cheng Bao Dong , Tian Yuan
Published: January 2012

Low carbon economy is rising at home and abroad as a new development model. Coping with the new situation of financial crisis and low carbon economy, forest product trade draws widespread concern in academic circles. This paper analyses the export trade of forest products by the grey relational analysis, the result shows that the changes of forest products export consistent with the added value of forest products, the paper proposes the countermeasures and suggestions to optimize the structure of exports of forest products, transforming export trade of forest products to a low carbon economy.
Research on Relevance to Efficiency of Greening Residence Assessment System and Scalar of Criteria
Authors: Wang Jing , Zhang Zhi Qun
Published: January 2012

It is a common view to build up a sustainable development world, and greening/ecological residence is becoming more and more popular. So an efficient assessment system is so important for all the shareholders to assess a residence project and certificate an authoritative, rational and impartial level of the project. A test is designed in this paper to illustrate relevance to efficiency of greening residence assessment system and the scalar of criteria, and claim the efficiency is extremely low of a fat criteria system based on the test results.
Nonlinear Analysis of Water Resources Awareness of Different Occupations in Heihe River Basin China
Authors: Li Jian Lin , Wang Yan
Published: January 2012

Based on sociological survey on the situation of water resources in Heihe River Basin China, using fractal theory, a nonlinear analysis of survey data was conducted according to different areas and different employments. A new concept, degree of water resources shortage (WRS), was introduced in this paper. We found that WRS had fractal charcateristics, and its fractal dimension (D) was a indicator to measure WRS, that is, the smaller the value of D, the higher the value of WRS. From upper reaches to lower reaches the change of WRS showes an exponential increase. D of farmer and herdsmen, office workers, cadres of the water sector was 0.3987, 0.72 and 0.4941 respectively. It showes that WRS of farmer and herdsmen is higest in all of sample. In order to solve the problem of water resources in Heihe River Basin, it is required to further enhance the people’s awareness of the water resources shortage.
Positioning and Planning for the Tourism Development of the “Red Land of Peach Blossoms” - Planning and Design for the Xingzhou Entrance Area of Jinggang Mountain Scenic Area
Authors: Cao Ying , Yang Jin Peng
Published: January 2012

Environment is the starting point and the supporting point of the positioning and planning for the tourism development. By analyzing the advantages of the environmental resources of the Xingzhou Entrance Area to the Bijia Mountain in Jinggang Mountain Scenic Area, this paper determines the positioning and strategies for the tourism development of its “Red Land of Peach Blossoms”, and by combining with the setting of the function blocks and starting with the analysis of environmental factors, it carries out the planning and design by taking the reproduction of scenes as its means.
Technological Optimization of Ethanol Fermentation on Energy Beet with Tolerance High Temperature Yeast Strain
Authors: Shi Shu Zhi , Cheng Da You , Ma Feng Ming , Dai Cui Hong , Lu Zhao Xin , Luo Cheng Fei
Published: January 2012

Temperature affected ethanol fermentation of energy beet greatly.This study showed that yeast HADY was tolerant to high temperature and when the fermentation temperature was 45°C,the translation rate of ethanol was higher.The three main factors were screened out from nine factors related fermentation by Plackett-Burman design and response surface methodology, such as substrate concentration, ratio of solvent to material, added HADY amount,nutrient salts, phosphorus addition amount, pH value, rotational speed, fermentation temperature and fermentation time. The three main factors included substrate concentration, fermentation temperature and phosphorus addition amount.The optimized technological parameters of HADY were as follows:substrate concentration12%, ratio of solvent to material 1:1, added HADY15%,nutrient salts 0.5,added phosphorus 0.9%, pH 5.0,rotation speed 130r/min, fermentation temperature 37°C and fermentation time 44 hours.At the time, the result showed that the translation rate of ethanol was 89.43%.
Recovering Ammonium-Nitrogen and Phosphorus through Struvite from Anaerobic Digested Effluent of Poultry Wastewater: Effects of Reagent Ratio and pH
Authors: Yang Hong Rui , Zhang Ya Lei , Zhou Ue Fei , Zhu Hong Guang
Published: January 2012

Fermentation wastewater generated from livestock and poultry breeding contains high strength of ammonium-nitrogen and phosphorus, which has the huge nutrient recovery value. To recover nitrogen and phosphorus from the fermentation wastewater, struvite precipitate is a promising option. This paper focused on the ratios of reagent adding and pH optimizing during the ammonium and phosphate recycling through struvite precipitate. Using MgCl•6H2O and NaHPO4•12H2O as precipitants, the optimum conditions were discussed in the paper. The results indicated that during a reaction time of 30min and a mixed speed of 100r/min , the ammonium and phosphate were removed by 89% and 88.7%, respectively at pH 10.5 and a molar ratio of Mg:N:P=1.2:1:1. In addition, it could reduce the organic matter content with a COD(Chemical Oxygen Demand ) removal efficiency of 36.2%. The recovered struvite had been suggested to display excellent fertilizer qualities, and also could be recycled and reused as a resource of nitrogen and phosphorus.
Characterization of CO2 Storage by Clathrate Hydrate Crystallization
Authors: Liu Ni , Xuan Xiao Bo , Li Ju , Liu Dao Ping , Xie Ying Ming , Qi Ying Xia
Published: January 2012

A potential way of CO2 capture and storage by hydrates is proposed in this paper. The characteristics of hydrate formation is investigated in a small scale dynamic reactor under high pressure conditions from 2-3.5Mpa. Temperature varied between 0.5-4°C. The effect of supercooling degree and overpressure on hydrates formation were discussed. Hydrates formation can be completely finished within 150min and the final pressure-temperature points of system are just on the hydrates equilibrium curve. The induction time increasing with the decreasing of supercooling degree and increase of pressure. It is less than 40min under the experiment conditions.
The Effect of Air Curtain on Controlling Contaminants in Wards
Authors: Guo Chun Mei , Li Yan
Published: January 2012

Controlling the concentration of contaminants in wards to prevent airborne infection is an important issue in hospital. The effect of supply airflow of down-feed air curtain, which locates between patients and doctors/nurses, is to separate wards into two spaces, one for patients and the other for doctors/nurses. The controlling effects of air curtain on contaminants emitted by patients are numerically simulated under different air arrangements. In a laboratory model, the smoke of burning Zang incense serves as the source of contaminants. Particles’ concentration of contaminants was tested with a laser particle counter at different sites whether the air curtain was running or not. Draughty feel on patients caused by supply airflow of air curtain was researched in this study. Results of the present study revealed that air curtain could control contaminants effectively, and the supply airflow did not make patients discomfort basically. Finally, the appropriate air outlet location and distance between air curtain and patients were suggested.
Sensitive Analysis of Water-Network
Authors: Shen Ren Jie , Liang Yan Yan , Zhang Jing
Published: January 2012

As a weak point, bottleneck plays a crucial role in improving the property of the whole water system. In this paper, sensitivity computation formula is defined and corresponding mathematical model is established to confirm the bottleneck of water network. And the case proves that the bottleneck streams and units can be easily confirmed by the method in this paper.
The Standardized Study of High-Strength Concrete Pole Section Combination
Authors: Lin Yi Wei , Wang Dan , Wang Yu Jie , Zhai Jian Feng
Published: January 2012

The Standardization of High-strength Concrete Pole and Pole section Combination can solve Non-standard state on design, bidding and production. Exploring the formulation of Standard pole and Pole section combination is a work of carrying forward the cause and forge ahead into future. Starting with the analysis of existing production capacity and the development of standards, the paper design 8 series of pole section combination which contain 44 types or 153 standard pole combination, and intuitively explain every pole combination’s design, production, bar code and the cracking test moment limits by the List of forms. Finally, the paper generally explained the pole’s standard combination, and pointed out theirs’ way of the use and expansion.
The Distribution And Resource Evaluation of Typical Energy Plants (Jatropha curcas L.) in Guangxi, China
Authors: Wen Yuan Guang , Zhu Hong Guang , Tang Min , Chen Fang , Tang Lin , Xu Ying
Published: January 2012

Jatropha curcas L. is an important resource for bioenergy. There are many kinds of energy plants in the world, but they are not utilized sufficiently. Because of the lack of knowledge on resource numbers and distribution of energy plant limited their development. In this paper, we discussed the natural distribution of Jatropha curcas L. in Guangxi province. At the same time, we carried out assessment on the energy plant resource numbers of Jatropha curcas L. in Guangxi. At last, we provided some suggestions for developing of Jatropha curcas L. in China.
Study of the Characteristics, Disaster and Prevention of Sandstorm in the Central and Western Regions of Inner Mongolia
Authors: Hao Yun Hong , Li Li
Published: January 2012

The central and western regions of Inner Mongolia is a high activity area of sandstorm in northern China, each year there regions are seriously affected by sandstorm. In order to effectively reduce and control sandstorm disasters, this paper studied the sandstorm in there regions, and proposes the causes, moving path, the time distribution and geographical distribution characteristic, disaster performance of the sandstorm, and proposes measures to prevent and treat sandstorm.
From Traditional Building to Modern Architecture a Study on Sustainable Development of Architecture Engineering
Authors: Pang Hui , He Xiao Min
Published: January 2012

One of the most important factors to keep the world in a good developing trend is the sustainable developing architecture. And the practical application of traditional regional architecture, besides mean of modern architectural science, is an important method beyond neglect to achieve energy saving, environment protection and sustainable development.
The Development of Hydraulic Water Separator Used in Construction
Authors: Chen Xiao Chen , Liu Jing Guang , Xie Guo Hong
Published: January 2012

Hydraulic water separator can realize the automatic control function by the use of pump-control speed electro-hydraulic servo control system. It can keep the centrifuge adapting to the changes of the water parameters fully with the real-time date collection of centrifugal speed according to different parameters including the density, viscosity, solid-phase content and particle size. It can achieve the best effect by the assurance that the centrifuge is always in the best condition.
Simulation and Analysis of Two-Level Photovoltaic Grid-Connected System
Authors: Zang Hai Yang , Yang Xiu
Published: January 2012

As the power output of the photovoltaic (PV) cell changes with the insolation changing, PV cell temperature and cell voltage changing, it is necessary to control the operating voltage to draw the maximum power of the PV cell in order to increase system efficiency. Two-level three phase grid-connected PV system is designed. The forestage BOOST chopper adopt Incremental conductance algorithm to implement Maximum Power Point Tracking; The controller for the inverter system contains inner current loop and external voltage loop. According to the proposed control schemes, the phase and frequency of grid-connected current is the same as grid voltage, with the result of unity of the power, factor for power grid. The PV grid-connected system is built by MATLAB/SIMULINK, and the simulation results show that the proposed control schemes are validated.
Protection and Recovery Countermeasures for Mining Geologic Environment
Authors: Feng You Li , Yu Li Jing , Qian Hong Wei , Li Jian Lin
Published: January 2012

Mining development greatly promotes the development of social economy, but also it caused great damage for the mine geological environment. It is urgent to protect and treat the mine geological environment. By analyzing the status of mine geological environment, comprehensive management principles and objectives, policies and laws, supervision and management in such aspects as Chinese mine geological environment protection and realize the sustainable development of mining the countermeasures and suggestions.
The Current State and Future Strategy for Utilizing Biomass Energy in Beijing
Authors: Zhou Zhong Ren , Chen Qun , Wang Ai Ling , Zhou Lian Di
Published: January 2012

In recent years, the biomass energy industry has become an important part of the construction of “Green Beijing” and has begun to grow. This paper analyzes the resource availability, present situation, and existing problems with biomass energy in Beijing. In addition, it examines the advantages and disadvantages of developing biomass energy in Beijing, and proposes future development strategies. The findings are: 1) developing and utilizing biomass energy effectively and appropriately in suburban Beijing to improve livelihoods and the environment; 2) making full use of the technological, knowledge, and information advantages in Beijing by building an R&D base for biomass energy technologies; and 3) funds and technology should be transferred externally to establish a biomass energy industry base in regions outside of Beijing.
Wind Induced Vibration of a Super Tall Building Considering the Variations of its Damping
Authors: Xu An
Published: January 2012

In this paper, a improved algorithm based on Newmark-βto analyze the structural response under wind loads was presented and enhance the calculation efficiency in a great degree. The GWT was presented as an study case and its response under wind load was calculated by the proposed method. Nonlinear damping was taken into consideration in calculation. The result show that the structural RMS response in cross-wind direction is much larger than that in along-wind direction.
Strategic Thinking for Low Carbon City in China
Authors: Liu Yi Jun
Published: January 2012

City plays an important role during the national economic and social development. It is also a crucial and useful way to solving some complex or urgent problems, such as environment and resourses. So, strategic thinking for the development of China’s city is really necessary. This paper starts from some concepts and ideas of low carbon economic and low carbon city based on that we make sense of the meanings of the low carbon city in China. In turn, the backgorund of city development, which mainly foucses on the issues of spatial structure analysis, relationship between urbanization and industrialization, and urban energy consumption is introduced. Then, it can be concluded that rapid urbanization and industrialization will promote energy consumption and a low carbon mode as developing direction should be adopted for city. Accordingly, optimizing economic structure, enhancing energy efficiency, changing life style and developing low carbon technologies are defined as the key areas for developing low carbon city.
Evaluation of Development Process of Strategic UAV Considering the Risk
Authors: Saberi Esmaeel , Mohammadzadeh Mahdi , Abadi Isa Nakhai Kamal , Amalnik Mohsen Sadegh
Published: January 2012

Economic evaluation of macro projects requiring a high volume of investment is one of important issues in the area of financial research. To deal with this problem, a great number of models such as direct operating cost, discounted cash flow analysis (e.g. net present value or internal rate of return), decision tree and real option analysis have been developed. Application of real option analysis has drawn more attention in recent researches because of the ability to assess the flexibility and considering the risk. In the present article, also, this theory is used to evaluate the development process of strategic unmanned aerial vehicle (UAV). To do this, a model comprising 4 development stages is used with each stage applying a novel approach to implement the model. In particular, we have tried to calculate and include the risk in an organized form in the model. Results obtained from a case study will be described at the end.
Application of Quality Control Techniques in Construction Projects
Authors: Wei Jia
Published: January 2012

Quality control techniques have long been used in the businesses that primarily sell and produce standard products and seldom conduct external projects. This paper tries to introduce those quality control techniques to construction contractors or builders and probes the probability of applying them in the quality management of a construction project.
Research on Relationship between Expenditure for Science & Technology Activities and Economic Growth in China
Authors: Zhang Lei
Published: January 2012

Based on the statistical data during the period from 1978 to 2006 released by National Bureau of Statistics of China, this paper aims to apply the compensative GM (1, N) model and regression model to simulate the relationship between the expenditure for science & technology activities and economic growth in China. In the numerical experiment, the established grey model simulates the China’s GDP values during the period from 2000 to 2006. The empirical research results reveal that the established mathematical model based on grey theory for the relationship between the expenditure for science & technology activities and economic growth has a higher precision than regression model. Research results show that this grey model established in this paper could provide valuable information to policy makers in their efforts to make technological and economic policies.
Study on the Nitrogen Removal Capacity and Mechanism of Bioretention Tanks with Different Engineered Soils
Authors: Peng W.F. , Li Z.F. , Zhang S.H. , Meng Y.Y. , Cheng J.G.
Published: January 2012

Under continuous observation of the TN, NH3-N and NO3-N levels of the influent and effluent, as well as the changes in permeability coefficients of bioretention tanks with different engineered soils, the nitrogen removal capacity and mechanism of bioretention tanks were investigated. The research showed that the bioretention system had advantages in the nitrogen removal of rainfall runoff, and the average removal rate rose from 50% during the stabilization stage to up to 70% after running for 9 months. In addition, the permeability coefficients of bioretention decreased as the nitrogen removal capacity increased, with the permeability coefficients decreased by as much as 50% or even up to 90%. This study is of great importance for further exploration on the mechanism and application of bioretention technology in the purification of rainfall, and may play a positive role in promoting an environmentally-friendly society as well as sustainable development.
An Improved Method for Generating Colored Pencil Drawing
Authors: Xie Dang En , Hu Hai Na , Zhang Zhi Li
Published: January 2012

In this paper, we put forward an improved non-photorealistic rendering method for generating a colored pencil drawing from digital image. First, to make sure the result can retain the original color information, we use the original pixel value instead of the black dot which generated by the traditional white-noise generating method. Second, we added a ratio for the Kirsch operator to be suitable for different images with different details. Third, we present a new approach which extruded form the luminance of the original image to determine the stroke orientation. Based on our methods, the quality of traditional pencil illustration can be guaranteed to a certain extent, and an effective and convenient tool is provided to generate the same drawings in style with artists and illustrations even for the users that have not been trained professionally.
Ecological Balancing for Universally Implemented Industrial Products
Authors: Ramadan M.R. , Mohamed M.A.S.
Published: January 2012

For such industrial products commonly spread worldwide, a compromised viewpoint is often sought in order to reach a balance between their useful and harmful aspects with regards to all members of the ecological system. Before industrial upheaval, the six members of the closed ecological system have been interacting while maintaining each one existence besides fulfilling its main vital needs. The industry-free ecological system has then reached its balance state based on a Markovian process. A worldwide industrial product, however, features an introduced member with both useful and harmful aspects. The ecological system is thus expected to disturb for a certain period before ultimately reaching another balance state. The interaction rates between individual members are here experimentally measured and used as entries of 7x7 enlarged transfer matrix between two consecutive states. Application of the Markov ecological matrix to analyze motor vehicle environmental balance shows that more than 30 years are urgently required to reach the balance state. However, the balance state includes severe intolerable resource damages.
The Research of Direct Torque Control Based on Full-Dimensional State Observer
Authors: Xu Shu Ping , Wang Shu Rong , Su Xiao Hui
Published: January 2012

To overcome integrator initial value, error accumulation and DC offset of pure integration, there proposed a permanent magnet synchronous motor stator flux observation method based on full-dimensional state observer. It uses the stator flux as state vector structural system state equation, the current as the output vector structural system output equation. And it configures the observer poles proportional to the motor model poles and use robust pole assignment algorithm in Matlab for observer gain matrix calculation. Experiments show that the full-dimensional observer on the stator flux observed has higher accuracy. The direct torque control system has better performance.
The Application of Knowledge Management in University Library Service
Authors: Rong Xia
Published: January 2012

The library knowledge safety group is a group with innovative and effective. It is a kind of close relationship in user. To a certain extent changed my attitude of teachers, improve the library college library services, truly builds a win-win situation of university library, information resource guarantee system and discipline. Provide professional knowledge safety should need to build knowledge library service system and forming knowledge and innovation and professional disciplines the realty service for teaching and research universities range. Along with the network technology unceasing development, technical development and interdisciplinary detailed knowledge management service discipline will be a long-term and arduous task.
A Study on some Aspects of E-Procurement in Indian Organizations
Authors: Gupta Manish , Narain Rakesh
Published: January 2012

Electronic Procurement (EP) is frequently defined as the sourcing of goods or services via. electronic means, usually through the internet. Use of IT into procurement can be termed as EP and involves electronic ordering, bidding and rendering via portals, extranets, private platforms, marketplaces, and/or EDI. It can also involve the use of purchasing cards, reverse auctions, and/or integrated automatic procurement systems to facilitate, the corporate buying process. EP offers number of advantages but its rate of adoption is very slow. This paper reports the findings of a survey carried out in 36 Indian organizations to ascertain the extent of adoption of EP and impact of IT on EP practices. Some of the important findings of the survey are; the main objective for adoption of EP are to enhance customer service and satisfaction, to produce highly reliable products, best product performance, to improve product quality, improve on time delivery, Government of India also promotes the adoption of EP for better transparency and to eliminate unethical practices, the extent of use of IT by organization’s key suppliers, competitors and customers is significant and security concerns through digital networks seem to be a greater threat. Paper concludes by discussing the major barriers in the adoption of EP along with the impact of EP on performance measures.
A Framework for Evaluating R&D Process Using a Best Practice Approach
Authors: Jo Yeong Ran , Cho Chan Woo , Kim Jee Eun , Lee Sung Joo , Yoon Jea Wook
Published: January 2012

Recently a strong increase in R&D investment has encouraged a firm to create a more effective and efficient R&D process, which allows it to save time and costs significantly. In order to build such a process, a firm should be able to evaluate its process, based on which the process can be improved. With all its importance and value, however, the previous studies on R&D process have seldom focused on the method of evaluating the process. Therefore this study aims to develop a framework for evaluating R&D process. For the purpose, CMMI (Capability Maturity Model Integrated) is used as a main method, which is a process improvement approach that provides organizations with the essential elements of effective processes that ultimately improve their performance and thus considered suitable for this research. We tried to develop a framework for evaluating R&D process based on the CMMI approach by modifying it to be suitable for measuring R&D performance where the essential elements for effective R&D process are obtained from the literature on best practices. A simple case study was conducted to illustrate how the proposed framework could be applied. The research results are expected to guide R&D process improvement across a project, a division, or an entire organization.
Development of a Framework for R&D Process Assessment
Authors: Kim Ah Yeon , Ha Hyun Hak , Yoon Byun Gun , Yoon Jae Wook
Published: January 2012

Although R&D activity has been increasingly considered as an important factor in managing an organization, related efforts have not been effectively conducted. In particular, construction of R&D process and assessment of the process, which are regarded as a critical tool for managing R&D activities, are not well-defined due to the lack of research and the different characteristics of R&D organizations. Therefore this paper aims at proposing a standardized R&D process and a R&D assessment framework by investigating the existing R&D process of R&D organizations, literature survey and interviews on domain experts. To verify results of this research, a case study on a Korean R&D organization is conducted.
The Role of Project Manager in SMEs for Developing New Product by E-Collaboration
Authors: Mohammadjafari Marjan , Shamsuddin Ahmed , Md Dawal Siti Zawiah , Zayandehroodi Hadi
Published: January 2012

The research in this paper is based seeks to understand how manufacturing companies can accomplish of their projects in the real time with less cost. This paper describes a new model using critical success factors of implementing projects in the small and medium size enterprises (SMEs). The factors in conceptual model were identified in past studies and validate from the survey by interview with 20 project management in electronic industries in Iran. Several prior researches have suggested some critical success factors for reducing time and cost in new product. These factors are departments of product, planning, procurement and design. However, none of these studies has proposed a model that specifies practices that should be undertaken to facilitate the progression to reduce time and cost in new product in SMEs. Following this, a development of a new model is supposed important to help SMEs understand what is required in order to be an effective global organization in terms of reduce time and cost by electronic collaboration (E-collaboration) through project management.