bluuebunny/crossref_metadata_2025 huggingface dataset:
Studies on Magnesium Chloride Hexahydrate as Phase Change Materials
Authors: Li Yu Ting , Yan Dong Jun , Guo Ya Fei , Wang Shi Qiang , Deng Tian Long
Published: August 2011

Magnesium chloride hexahydrate (MgCl2•6H2O), which has a melting temperature of 389.7 K and latent heat of 168.6 kJ/kg, is one of the cheapest materials used as the thermal energy storage material. Like most hydrated salts, MgCl2•6H2O also has the problems of supercooling and phase segregation to limit its application. In this paper, some new progresses on magnesium chloride hexahydrate as phase change materials are summarized, and the new trend in the future is pointed out.
Research on Tourism Ecological Security of Lake in Dongting Lake
Authors: Nie Na , Wang Hui , Xiong Jian Xin
Published: August 2011

Put forward the understanding of ecological security of tourism should be closely integrated regional objects，Establish the concept of regional background feature has a decisive role in the various factors of assessment of tourism destination ecological security. The expression of tourism destination tourism ecological security is clarified. According to the current state of social, economic and tourism industry and the ecological environment background characteristics of the East Dongting Lake tourist destination, Diagnostic system of tourism destination ecological security. And make relatively accurate evaluation of the security state. Diagnosis of the East Dongting Lake tourist destination tourism ecological security is in a relatively secure state, at the same time should be brought to society, government, tourism industry of great concern.
Pollution Level and Distribution of PCDD/PCDF Congeners between Gas Phase and Particulate Phase in early Spring Air of Dalian, China
Authors: Zhu Xiu Hua , Qin Song Tao , Xu Qian , Ni Yu Wen , Chen Ji Ping , Zhang Xue Ping , Wang Wei , Mu Jun
Published: August 2011

Ambient air of Dalian was sampled with active high-volume air samplers in early spring time. The concentrations and the congeners between gas phase and particulate phase of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) in the air were measured. Samples analysis results showed that the concentration of PCDD/Fs in particulate phase was higher than that in gas phase. The ratio of PCDD to PCDF in gaseous phase and particulate phase was lower than 0.4. The main sources of atmospheric PCDD/Fs in Dalian early spring season were coal-related source. The total I-TEQ in gaseous phase and particulate phase was 30.3 and 143.6 fg m-3, respectively. The I-TEQ of Dalian early spring atmosphere was lower than international standard, the atmospheric quality in Dalian was better.
Comparative Analysis of Domestic and International Ecological Civilization Theory
Authors: Yang Chun Yu , Li Hui Ming
Published: August 2011

In 2007, the political report of 17th conference of national delegate of Chinese Communist Party put forward that ecological civilization should be built in China. Ecological civilization brought out in the low development level of China is the strategy of Chinese development, and is an important part of Chinese modernity aim. The paper describes some important thoughts in foreign countries about the ecological civilization in history. Based on the comparative analysis of domestic and international ecological civilization, the paper brings out several suggestions on building ecological civilization in China.
Adhesion Mechanism and Modification Methods of Solvent-Free PU Adhesive
Authors: Yan Jin , Chen Guang Xue , Tang Bao Ling , Tai Jing Lei , Chen Qi Feng
Published: August 2011

Solvent-free adhesive is a kind of environmental friendly adhesive which is safe, less material consumptive and just needs simple curing conditions. In this paper, the two components solvent-free polyurethane adhesive for flexible packaging was discussed, including its characteristics, composition, curing and adhesion mechanism and three modification methods. The curing mechanism of this adhesive is that crosslinking happens between –NCO and –OH which are contained in two components respectively. However, its adhesion mechanism is different when the adhesive is bonding with polyester film, paper, fabric, metal and other materials. The modification methods of two components solvent-free polyurethane adhesive include modification of its soft segment, modification with epoxy resin and modification with organosilicon and so on. The performance of adhesive can be improved through modification.
Effect of Relative Height between Water Tank and Collector on Performance of Thermosyphon Solar Water Heater
Authors: Wei Sheng Xian , Yan Cui Qiong , Shi You Ming
Published: August 2011

The effect of relative height between the bottom of the tank and the top of the collector on performance has been studied both theoreticaly and experimentally. According to the national testing standard methods, the efficiency of the system was tested. The results show that the simulation results are in good accordance with the experimental ones. The data indicate that the optimum value of relative height is 0.74m with the maximum efficiency of 67.7% for the system with a total area of 1.5m2 and storage water tank capacity of 120L. Increasing or decreasing the relative height within a range of 0.3m has no significant effect on thermal efficiency.
A Study on the Removal of NOx in Simulated Flue Gas Using Urea/Potassium Permanganate Solution as Absorbent
Authors: Hu Jiang Jun , Liu Jing , Zheng Ying , Cen Chao Ping , Gan Fu Xing
Published: August 2011

The removal of NOxin simulated flue gas was studied using urea/ potassium permanganate solution with different concentrations as absorbent. Experiments were carried out in a packed absorption reactor filled with steel pall rings at about 70°C. The effect of amount of urea, amount of potassium permanganate, effective height of absorption solution and addition of SO2on denitrification efficiency was examined. The results show that a high removal efficiency of NOxcan be attained using urea/ potassium permanganate solution process, In the solution of 5% urea and 600mg/L potassium permanganate, the removal efficency of NOxcould be achieved 91.5%. Increasing the amount of potassium permanganate and the effective height of absorption solution could improve denitrification efficiency remarkably. Whereas, no obvious improvement in NOxremoval efficiency was observed when increasing the amount of urea without potassium permanganate. The adding of SO2resulted in a decline of denitrification efficiency.
Study on Effects about the Growth of Summer Maize by Different Furrow Irrigation Way
Authors: Wang Shun Sheng , Wang Song Lin , Gao Chuan Chang
Published: August 2011

The paper studies the effects of the growth about summer maize on different ways of furrow irrigation and Processing of water. The results showed that controlled alternative furrow irrigation can effectively inhibit the growth of maize redundancy, so that is conducive to production of photosynthetic to the formation of the direction of operation, irrigation and water consumption decreases, the yield unchanged. Reasonable control of water in the lower limit, controlled alternative furrow irrigation is suitable for water supply maize model.
Research Progress of Photosynthetic Bacteria in Wastewater Treatment
Authors: Li Li Xin , Yang Xiu Min , Li Ang , Zhang Tuan , Liu Yan
Published: August 2011

The characters of photosynthetic bacteria and its action mechanism were simply described, And the research of using photosynthetic bacteria to treat eleven kinds of wastewater such as monosodium glutamate wastewater, citric acid wastewater, distillery wastewater, starch wastewater, bean products wastewater, Chinese traditional medicine wastewater, dye wastewater etc were discussed in detail in this paper. It was also pointed out that the photosynthetic bacteria will have a promising prospect in water pollution prevention.
Cooperative Catalytic Effect Analysis of Visible Light Response Nano-ZnO and TiO2
Authors: Li Gang , Li Yan Sheng , Wang Ying , Gao Hong
Published: August 2011

Nano-ZnO, nano-TiO2and their mixed catalyst respectively degrade methyl orange solution with concentration 10mg/L in sunlight. When the dosing quantity is 1g/L during 8h degradation, the degradation effect is better and the degradation rates of three catalysts can all reach more than 93% with prolonging of degradation time, and the degradation effect of mixed catalyst is best and its degradation rate reaches more than 99%. Moreover the effect of TiO2content in the mixed catalyst on catalytic degradation isn’t distinct.
Program on Treatment of the Landfill Leachate by Onland Planting Reed (Phragmites)
Authors: Shi Kun , Zou Ming
Published: August 2011

The microcosm tests were done to estimated the HRT (Hydraulic Retention Time) and removal efficiency of reflowing treatment of the landfill leachate collected from Dalian Maoyingzi Municipal Solid Waste Landfill, which contained high levels of COD (Chemical Oxygen Demand, 38400 mg/L) and SS (Suspended Solids, 650 mg/L) by the reed constructed wetland located in the south area of Dalian Jiaotong University. The results showed that: (1) The HRT in nature soil cuboids were significant shorter than those in sieved soil cuboids (P<0.01); (2) The removal efficiency among the output water with the trend as follows: Preferential flow (53.9%)<Percolating water (59.2%)<Reflowing water (63.3%); (3) The COD and SS were decreased from 38400 and 650 mg/L to 14080 and 213 mg/L by the way of reflowing with the HSL (Hydraulic Surface Loading) of 0.16 m3/(m2·d) by reflowing (Removal efficiency: COD: 63.3%; SS: 67.3%).
Analysis on the Copper Metabolism in Printed Circuit Board Industry
Authors: Zhu Lin , Xu You Peng , Sun Qin Fang
Published: August 2011

Substance flow analysis (SFA) is a kind of quantitative analysis on the metabolism of industrial process. This paper analyzed the metabolism route of copper, the main contaminant of PCB industry from the aspect of enterprise, in the manufacturing of PCBs, calculated the flux of copper between all the nodes, and studied the efficiency of copper in order to improve it. As shown from this paper, the relatively low efficiency of copper usage resulted in the copper contamination of PCB industry, which was often emitted into the environment as etching waste liquid or solid waste. Therefore, this paper proposed that we should regard the improvement of the efficiency of copper usage as key to cut off copper contamination in PCB industry, namely the focus on cleaner production with recycling of copper wastes.
Simplified Method for Assessing Outdoor Ventilation Environment for Heat Island Relaxation
Authors: Hung Ian , Lin Hsien Te , Chou Jung Hua , Cheng Yuan Liang
Published: August 2011

This study introduces a new method for assessing the outdoor ventilation environment in Taiwan, with a view to reducing the heat island phenomenon. The ventilation environment is important in cooling the outdoor environment, but its evaluation is very difficult and complex. Therefore, this study develops a simple method for assessing the outdoor ventilation environment, it is used in computational fluid dynamics (CFD) simulation software, only to generate numerical models using empirical building types include rectangular shape and courtyard building, then calculate their wind shadow areas (WSa). Then, many factors, such as the site plan, the size of building and local wind data are used to draw these areas to the scope of WSa. The results of the simple assessment method are verified by performing CFD simulations to corroborate the correlation between simplified assessment method and CFD simulation result, an R2value of 0.87 is obtained. The method is helpful in improving design decisions in the planning and design stage of site plan.
The Distributive Characteristics of Soil Microorganisms at Dry Lake Wetland on Semiarid Grassland
Authors: Shao Yu Qin , Zhao Zi Long , Hou Miao Miao , Min Hui , Liu Zhong Ling , Zhao Ji
Published: August 2011

This research investigated the distributive characteristics of soil microorganisms at dry lake wetland on semiarid grassland. Four plots, typical steppe (DT), lake side (HB), lake bed (HD), and lake center (HX), were selected from Huitengxile located in semiarid grassland to conducted this investigation. The results showed that the number of aerobic bacteria at DT is 1.07 times that at HB, 1.14 times that at HX, and 1.45 times that at HD. The number of fungi at DT is 3.81 times that at HD, 10.65 times that at HB, and 25.75 times that at HX. There is significant difference between HX, HB and the other two plots (p<0.05). Also, there is significant difference between HD and DT. The number of Spore-forming bacteria at DT is 1.65 times that at HD, 2.15 times that at HB, and 6.35 times that at HX. There is significant difference between HD, HB and the other two plots, as well. The number of actinomycetes at HB is highest which is 2.12 times that at HD, 2.27 times that at DT, and 3.43 times that at HX. Moreover, there is a distinct feature of transverse distribution for soil microorganisms communities at dry lake wetland on semiarid grassland. Excluding actinomycetes, the number of soil microorganisms at dry lake wetland were both lower than that at typical steppe. There is a significant correlation between the total amount of soil microorganisms and microbial biomass C at dry lake wetland. These results can be used as the theoretical foundation for the restoration of degraded lake wetland, and the exploitation and utilization of wetland microbial resources.
Seasonal Variations of BVOCs Emission from Ginkgo biloba Linn in Urban Area
Authors: Li De Wen , Shi Yi , He Xing Yuan , Chi Guang Yu
Published: August 2011

In this study, seasonal biogenic volatile organic compound (BVOC) emission rates and emission patterns of Ginkgo biloba linn are estimated. The released volatiles were collected from branches onto cartridges filled with Tenax TA, and quantified by thermal desorption gas chromatography mass spectrometry (GC-MS). The result showed that the main BVOCs emitted from Ginkgo biloba linn were alkanes, aldehydes, alkenes, aromatic compounds, esters, terpenes and ketones. The total BVOC emission rate increased from May, and reached its maximum 27.96 μg C g-1dw h-1 in July, then decreased quickly. The emissions of α-pinene, isoprene, cyclohexane, methyl-cyclohexane and 2-methyl-hexane were significantly correlated to both temperature (p<0.05) and light (p<0.05).
Performance of Denitrifying Phosphorus Removal by Aerobic Granular Sludge at Low Temperature
Authors: Bao Rui Ling , Yan Xiao Ju , Yu Shui Li
Published: August 2011

To deeply understand the performance of denitrifying phosphorus removal by aerobic granular sludge at low temperature, an aerobic granular sludge sequencing batch reactor had been operated at 10±1°C. The results showed that the PHAs components synthesized by phosphorus accumulating organisms (PAOs) in granule sludge were affected by different types of carbon source in anaerobic period, and the release and uptake of phosphate were also influenced. It was indicated that the increased ratio of PHV to PHAs led to the increase of the utilization efficiency of nitrate by denitrification PAOs. When initial COD concentration in anaerobic period was lower than 300mg/L, it can effectively keep organic substrates from flowing into the following anoxic period which influenced the efficiency of denitrifying phosphorus removal. Inhibition of nitrite to denitrifying phosphorus removal was decreased due to biology film growth manner of aerobic granular sludge. The inhibitory concentration of nitrite to denitrifying PAOs was 60 mg/L.
Poly- Factors Coupling Analysis of Baiyangdian Basin Water Storage Characteristics
Authors: Zhao Qian , Li Hong Bo , Wei Quan Wei , Zhang Huan Zhen
Published: August 2011

As typical shallow lake of the north China plain, Baiyangdian plays an important role on water system composition and water amount adjustment. Its water storage and average annual rainfall of the basin does not exist directly relation and its maintenance of function water amount can only rely on unconventional water supplies and diversion support. The lack of natural entering water and frequent artificially diversion makes Baiyangdian gradually become "artificial lakes". In order to solve the current problems of Baiyangdian, the control of development indexes for Baiyangdian basin water resources urgently needs to be intensified, and water diversion mechanism of basin water amount based on Water subsidise cycle should be established.
Preparation of a Novel Red Long Lasting Phosphorescent Material CaAl2Si2O8:Mn2+ and Investigation of its Luminescent Properties
Authors: Chen Bi Sang , Zheng Zi Shan , Lin Yan Mei , Chen Guo Liang , Zhou Liang , Guo Hong Xu , Huang Ling Feng
Published: August 2011

A novel red long-lasting phosphor CaAl2Si2O8:Mn2+ was successfully synthesized by sol-gel method. X-ray diffractometer(XRD) and fluorescence spectrometer were used to characterize the structure and photoluminescence of the persistent phosphors, respectively. Under UV light irradiation, this phosphor showed obvious long-lasting phosphorescence that can be clearly seen with naked eyes in a dark room for 18 min after the irradiation source has been removed. Thermoluminescence measurement showed that the phosphor has an appropriate energy depth of 0.43 ev.
Computer Aided Design for Safety Analysis of Excavation in Stratified Rock Tunnel
Authors: Wang Shu Yun , Xie Xiong Gang , Chen Xi
Published: August 2011

Stratified rock mass is widely existing in tunnel engineering. The most relevant feature of stratified rocks is the occurrence of very persistent bedding, which makes the rock-mass highly non-isotropic. A number of techniques for designing underground excavations in stratified media have been described in the literature, like theoretical method and laboratory test, which can only be applied in analyzing the problem with simple geometry and costs much expense. Recently, with rapid development of computer technique, numerical simulation methods have been widely applied in engineerin. Among all the numerical simulation methods, fast lagrangian explicit finite difference code of continua (FLAC3D) is widely used to solve practical problems, especially in field of elasto-plastic characteristic, large deformation analysis and construction procedure. So in the present paper, numerical simulation for the failure mode of stratified rock mass after tunnel excavation is done by FLAC3D, which can give further guidance to understand the anisotropic characteristic of stratified rock mass.
A Study of the Effects on Debasing Impurity, Current and pH Value in Water by Four Aquatic Plants: Taros, Water Hyacinth, Water Spinach, and Water Cabbage
Authors: Tsia Ping Yu , Li Huang Liang , Fu Jen Chi , Chiou Kuo Ching , Shen Yung Tang , Liu Cheng Chih , Wu Ching I , Weng Cheng Kai
Published: August 2011

The purpose of the study was to explore if there was a significant effect on debasing impurity, current and pH value by four common aquatic plants: Taros, Water Hyacinth, Water Spinach, and Water Cabbage. The duration of the experiment was 31 days. The researchers observed and recorded the change of impurity, current and pH value. Furthermore, the researchers utilized MANOVA to analyze the data collected and to explore if there was a significant effect on purifying polluted water by four aquatic plants. According to the results, there was a significant difference on debasing impurity and pH value among the four aquatic plants. These four aquatic plants were able to debase impurity in order as Water Cabbage, Water Hyacinth, Water Spinach and Taros. The effects of debasing impurity were in order as Water Hyacinth, Water Cabbage, Taros, and Water Spinach.
Research on Crack Prevention Method for Long Deck of Pump Station
Authors: Qiang Sheng , Pan Wei Feng , Dai Jing Qiu , Zhou Da Hai
Published: August 2011

Cracking is a common phenomenon in long concrete structure. But for hydraulic structure it is not permitted because crack will cause heavily seepage and other disaster. Temperature control is an important way to prevent cracking. As for a long deck which has to be constructed in summer, temperature control and crack prevention is a hard work. With the aid of finite element method for temperature field and stress field simulation, research is carried out for a long deck of a pump station. Different measures, such as pipe cooling, surface preservation and pouring temperature control, are tried to control the temperature and stress. The simulation results of different measures composite schemes are analyzed. At last the optimized measures are proposed and its application at site shows it’s successful.
Microstructure and Mechanical Properties of Mg-Gd-Y Alloy
Authors: Li Ke Jie
Published: August 2011

The Mg-12Gd-2Y-0.5Sm-0.5Sb-0.5Zr (wt.%) alloy was prepared by casting technology. The microstructure of alloy was then investigated after T6 heat treatment. The results show that at 523K, the alloy has shown the superior tensile strength (i.e. 345.5 MPa). When experimental alloy was stretched with temperature increasing from 293K to 523K, the increases of deformation strengthening and critical crack propagation stress caused the anomalous temperature dependence of tensile strength.
Vibration Analysis of a Moving Truck on a Long Span RC Culvert
Authors: Chen Shui Sheng
Published: August 2011

A general numerical simulation method is presented for the analysis of the dynamic interaction problem between a large-span concrete culvert, discretized by a plane strain finite element model (FEM), and a dynamic system of vehicle traversing at various speeds. The vehicle is represented as a mass-spring-damper FEM system with seven degrees of freedom. The time-variable coupled dynamic system is solved by a step-by-step solution technique using Newmark’s integration scheme. The backfill soil elastic modulus is modeled as varying linearly with depth below the ground surface. Several numerical examples are investigated by modifying different parameters such as backfill height and road surface stiffness, respectively. The dynamic displacement response for the mid-span point of the concrete culverts is analyzed, as well as the displacement impact factor. The research results demonstrate that the impact factor changes with the vehicle speed and strongly depends on the road surface roughness conditions.
Heat and Mass Coupled Transfer Combined with Freezing Process in Building Exterior Envelope
Authors: Kong Fan Hong , Wang Huai Zhu , Zhang Qun Li
Published: August 2011

In severe cold area, the exterior layers of envelope usually experience seasonal freezing /thawing due to cold climate in winter. However, it can lead to severe problems especially in the newly-completed building. In order to analyze the drying of envelope on building initial use, the heat and moisture coupled transfer of building envelope in severe cold area Harbin, China was simulated with the modeling method developed. The modeled result was analyzed. It is concluded that the drying rate of the newly-completed building envelope is significantly high in the first year, especially in the first few months. Insulation performance of the wall in the first winter is most serious due to the high initial moisture and freezing ice content in insulation layer. For the simulated envelope, the freezing of the moisture content especially that in insulation layer had notable effect on heat transfer coefficient (thermal resistance), and the maximum of heat transfer coefficient of the modeled envelope in the first year winter is about 7% higher than that in the tenth year, which is taken as final hygral state.
Research on Rainstorm and Flood Characteristics of YunNan Base on WebGis
Authors: Wang Jiang Xiong , Wen Jun , Zhang Fu Xia
Published: August 2011

The climatic and geographic characteristics in the Yunnan basin are introduced and characteristics of precipitation，runof and silting in the river basin are analyzed．The regulation of rainstorm and flood within the river basin is analyze according to the statistic data of previous rainstorm and flood.
Constitutive Relations of Concrete under Plane Stresses Based on Generalized Octahedral Theory
Authors: Yang Jian Hui , Sun Rong Ling , Yang Zheng Hao , Lin Xin Yang , Niu Hai Cheng
Published: August 2011

Continuous (or generalized) octahedral element bodies can be obtained by intercepting a cube with three groups of failure (or yield) planes successively under true triaxial stress state, on which the stresses are twin stresses. Among the resulting polyhedral characteristic element bodies, isoclinal octahedron and orthogonal octahedron are of particular importance. Strength models of continuous octahedrons are then derived by stress analysis to arbitrary inclined sections in three dimensional stress space, and strain models by the principle of strain analysis, so the plane constitutive relations of concrete can be understood by plane problems transformed by stress-strain space according to the symmetry of an orthogonal octahedral octahedron where an arbitrary oblique plane is parallel to one of three rectangular coordinate axes.
Study on Mechanical Behavior of Floor Beams in the High-Strength Cold-Formed Steel Framing System
Authors: Guo Yao Jie , Zeng De Wei , Chen Yan Zhou
Published: August 2011

Tests and the finite element method (FEM) have been used to research the mechanical behavior of floor beams in the new cold-formed steel framing system. A group of 3 floor beams have been carried loading test to obtain ultimate bearing capacity, then finite element models, using plastic shell element and simultaneous considering material and geometric nonlinearity in ANSYS, have been established to analyze the mechanical behavior of floor beams. Finally, the ultimate uniform loads are given for the various specifications of floor beams, for practical engineering design.
Design and Numerical Simulation of Timberwork Wind Power Generation Tower Model
Authors: Li Yan , Liang Wen Biao , Xiong Er Gang , Zhao Jun Hai
Published: August 2011

To promote the enterprise of wind power generation, optimize the structure of wind power tower and improve the generating efficiency, a mini-type timberwork wind power generation tower model was designed and fabricated. Based on the tests by the leeward loading scheme, static characteristics and dynamic characteristics of the model were analyzed by numerical simulation. The results calculated through the finite element simulation were in a reasonable agreement with the test results. Additionally, considering the impact of different load levels, the bearing capacity, stiffness and the dynamic behavior can meet the requirements, which has significant reference value on practical application.
Effects of Ball Mill Additives on Properties of Bronze Powder
Authors: Jiang Yu Dong , Cai Xiao Lan , Wang Kai Jun
Published: August 2011

Bronze powders were prepared using high-energy ball mill method. Effects of different additives on particle size and its distribution, gloss, water coverage and oxidation resistance of powders were discussed. The results shows that aluminum stearate has a great impact to sheet formation of bronze powder. Hexadecanoic acid has a great influence on the gloss and water surface covering. Polyvinyl alcohol(PVA) has a marked effect to improve oxidation resistance of the bronze powders.
Efficiency Air-Entraining Water-Reducing Agent in Concrete Study on the Freeze-Thaw Resistance
Authors: Hang Mei Yan , Zhang Wei
Published: August 2011

In this paper, the frost resistance on different water-cement ratio of concrete after the air-entraining agent admixture. When the gas is controlled about 4%, with the lower water-cement ratio, freeze-thaw resistance of concrete is increased significantly. And then the frost resistance of YC20 and YC40 concrete which are mixed in efficient air-entraining water-reducing agent were studied, the experiment results that when the concrete YC40 reached F300, gas content reached more than 4.5%,and the strength without reducing, the durability would improve. But the YC20 is different, so, GL-B4-efficiency air-entraining water-reducing agent does not apply to the water-cement ratio above 0.6 of the concrete
Experimental Research on Mechanical Behavior of GFRP Bars under High Temperature
Authors: Wang Xiao Lu , Zha Xiao Xiong
Published: August 2011

Experimental results on tensile mechanics properties of GFRP bars at high temperatures are present in this paper. Thirty commercially produced GFRP tensile specimens of 8mm diameter were tested at high temperature ranging from 10°Cup to 500°C. Tensile test result indicates that, the ultimate tensile stress has significant reduction at two temperature zones, one is glass transition temperature of epoxy resin (80-120°C), with strength degradation 22%, the second is the soften temperature of glass fibers(about 400°C), the strength decrease drastically with almost linear rate and remained 33% residual strength at 500°C. The elastic modulus remained unchanged until glass transition temperature of epoxy resin, and the modulus declined linearly with the temperature elevating. Stress-strain relationships of GFRP bars exhibit liner performance even at high temperatures.
Design of Interior Joints Strength of Buckling-Restrained Braced Frame of Reinforced Concrete
Authors: Chen Xiang Rong , Liu Hua Wei
Published: August 2011

The performance of buckling-restrained brace and the stress mechanism of interior joints in RC frame are both briefly introduced,based on which interior joints strength of buckling-restrained braced frame of reinforced concrete is studied，and contributions to the shear strength of the joint made by brace is therefore summarized. These results can serve as references for the design of interior joints strength of buckling-restrained braced frame of reinforced concrete to meet the “strong connection-weak connected member” requirement.
Energy Savings in a System Using Evaporative Cooling & Radiant Air Condition
Authors: Huang Xiang , Zheng Xiao Li , Yin Qing Hai
Published: August 2011

In order to analyse the potential of reducing energy consumption of the system ,which based on evaporative cooling and radiant air condition in civil building.In this paper,firstly,calculated cooling load of a office building in Xinjiang, China.Then analysed and compared the design methods,operating cost and investment cost of three semi-central air conditioning systems. The result shows that radiant air conditioning based on evaporative is low energy consumption , operation cost is 43 percent of conventional primary air fan-coil system .
Study on Cement-Based Vitrified Microsphere Thermal Mortar
Authors: Yang Jian Hui , Lv Ling Yan , Xiong Zheng Zhuan
Published: August 2011

According to the implementation of about 65% of the building energy efficiency standards in china, the existing external wall insulation technology will face severe challenges. The traditional organic insulation materials representative with polystyrene, due to some defects，such as poor fire resistance, poor durability, short service and no synchronous with the life of structure, and environmental pollution, especially to the fires of the CCTV building in 2009 and the building under construction at Shanghai pudong south road NO.1 in 2010, October 8 in morning, have solicited the research and application of the high performance inorganic insulation materials. And the new generation inorganic insulation materials, represented by vitrified microsphere, are getting increasing attention.
Thermoelectric Properties of Bulk FeSb2 and the Composite of FeSb2 and CoSb3 Prepared by Sintering
Authors: Liu Ke Gao , Li Jing
Published: August 2011

For investigating the thermoelectric properties, bulk FeSb2and the composite of CoSb3:FeSb2=7:3 was prepared via sintering. The phases of samples were analyzed by X-ray diffraction and their thermoelectric properties were tested by electric constant instrument and laser thermal constant instrument. Experimental results show that, bulk FeSb2and the composite of CoSb3:FeSb2=7:3 are P-type semiconductor materials. The electric resistivity of bulk FeSb2sample increases with temperature rising while that of the composite (CoSb3:FeSb2=7:3) decreases with temperature rising. The Seebeck coefficient of the composite (CoSb3:FeSb2=7:3) is evidently higher than that of bulk FeSb2. The thermal conductivities of the composite (CoSb3:FeSb2=7:3) are relatively lower than those of bulk FeSb2. TheZTvalues of bulk FeSb2sample are lower than those of the composite (CoSb3:FeSb2=7:3), that of the later increases with temperature rising at 100~500°C, the maximum value is up to 0.1647.
Research on the Parametric Design Technology of Qing Dynasty Architecture in China
Authors: Tan Jie , Wang Xian Gui , Wang Meng Lin
Published: August 2011

This paper tries to research on the parametric design technology of Qing-Dynasty architecture in China. It contacts the character of Da-mu-zuo in china Qing-Dynasty, the modern parametric design technology-- Geometric Description Language (GDL) to establish the elements model of Da-mu-zuo, and then use the elements to build a parametric model of one floor and four edged eaves wood framework by means of parametric design. At last the application of the parametric model is studied.
Dynamic Response of Pile-Board Subgrade Based on Large Scale Model Test
Authors: Su Qian , Li Xing , Bai Hao
Published: August 2011

A series of tests based on large scale model are designed to study dynamic response of pile-broad subgrade, aiming at structure’s response towards different load frequency and structure’s performance under long-term dynamic load. The test results indicate that dynamic stress of reinforcement and soil decrease slightly with load frequency, while accelerations trend to increase. Soil under loading plate has certain supporting effect because stress of reinforcement is smaller in test group with soil remains. Performance of pile-board subgrade under long-term dynamic load is steady and reliable since none of stress and displacement varies obviously when loading times increase to 106. Ultimate bearing capacity of pile-board subgrade is much bigger than actual demand, so the structural type of pile-broad plate remains to be optimized.
Study on Prediction and Assessment Methods of Outdoor Wind Environment of Residential District - Taking “Letian Home” in Leshan, Sichuan for Example
Authors: Ma Li Jin , Zou Hong Juan , Zhu Jia Shun
Published: August 2011

According to the micro-climate environment outdoor of the region, wind environment outdoor which is under planning programming can be done analog computation using computational fluid mechanics PHOENICS software. A set of comprehensive prediction and assessment system which is mainly focused on outdoor environment composite index WBGT can be established combining with assessment method on wind environment outdoor of predecessors in order to more accurately and humanly predict and assess the wind environment outdoor, bring safe, comfortable and healthy outdoor environment and provide references for the assessment and design of green residential district.
Framework for Construction Industry Sustainable Development Measurement
Authors: Zhang Peng , London Kerry
Published: August 2011

As a resource-intensive industry, the policy, processes and practices in relation to sustainable development of the construction industry is critical. An important theoretical and practical concern is the creation of indicator systems that assist with the measurement of sustainable urban development. Past research and practice has tended to focus on the measurement of sustainability of the construction projects in relation to the individual projects or at the organizational level. This paper introduces a new measurement of sustainable development for construction industry as a whole so that countries can make comparisons. The model is based on the previous research, the fundamental meaning of sustainable development and the characteristics of the construction industry.
Moving Vehicle Tracking Based on Kalman Filter
Authors: Yan Yan , Shi Yan Cong , Ma Zeng Qiang
Published: August 2011

The technology of vehicle tracking is a very critical and fundamental part in the Intelligent Transportation Systems (ITS). After the principle of Kalman filter was introduced, a method of vehicle tracking based on basic Kalman filter is proposed and the tracking error analysis is carried out in this paper. The experiment results show that the vehicle tracking method is robust, accurate, easily achieved and has good practical application merit.
Fuzzy Control Strategy Based on Mode Identification Used in Semi-Active Control
Authors: Meng Qing Li , Zhang Min Zheng , Ye Jian
Published: August 2011

In this paper, a new fuzzy control arithmetic based on mode identification used in semi-active control is put forward, the mode is differentiated by the eigenvectors constituted with drift, velocity and their resultant, and then different fuzzy control strategy is applied. Moreover, by numerical simulation, the control efficiency of the new control arithmetic is compared with semi-active control using sign control law and some passive control.
Development of Mechanical CAD System Based on ARX
Authors: Zhang Ying Jie , Jia Gui Hong
Published: August 2011

In AutoCAD2008 development platform, taking MFC and ARX as development, integrating MFC ODBC to develop database, combining with parametric drawing techniques, it establishes the basic framework of mechanical CAD system. And taking gears parametric drawing as an example, the key technology of CAD system is illustrated, which improves the design efficiency and shortens the development cycle.
Three-Dimensional Finite Element Analysis of Steel Silo
Authors: Chen Chang Bing , Liang Xing Pei , Bi Shou Yi
Published: August 2011

In this paper strength and wall stress of a steel silo were calculated in designing by using 3-D finite element method. According to the analysis result, intensity inspection and structure optimization were executed, which could provide the reference basis for construction design.
Software Development for Taiwan Building Envelope Load
Authors: Kuo Po Yen , Chao Yu Chan , Ou Wen Sheng
Published: August 2011

Taiwan’s building laws are very rigorous for envelope load of various buildings, and building envelope load should be calculated according to the Technical Code for Energy Conservation Design of Buildings. The complex calculation may undermine cooperative initiative of the industry. If computer aid can be used, the time for calculation and laws search can be save. To provide practical computer-aided calculation tool of envelope load for builders and academic departments, this study designed a computer-aided software BEEP-2010 which can quickly calculate whether the designed building meets the regulations. Java is used to write programs for this software. The database system applies the Relational Database. ER-model is used to normalize the database design. The user interface design adopts graphics mode to simplify operation interface. As long as the user understands basic concept of the envelope load, he/she only needs statistics of the area data and print the calculation result in the form of standard window to reduce the inconvenience in table search. Thus, this can greatly improve calculation efficiency of envelope load of Taiwan building businesses and help promote green buildings.
Design of Signal Acquisition and Analysis System Based on LabVIEW
Authors: Tang Gui Ji , Wang Zi Rui , Sun Jing Jing
Published: August 2011

This paper designed a signal acquisition and analysis system based on the characteristics of the graphical programming language of LabVIEW. The system adopted NI USB -9234 data collection card, applied with the virtual instrument and related technology for the signal collecting and processing system. The system also has dual-channel data acquisition, real time data acquisition, signal analysis in time domain and frequency domain, FFT implementation Waterfall conversion, signal simulation capabilities. On the basis of analysis the systems functional requirements, a detailed description of the functional programming and design of the front panel is approached. At last the feasibility of system is experimental inspected and detailed. Experiments have shown that the virtual instrument is a good solution to the efficient implementation of various missions.
Influence Factors Analysis in the Selection of Construction Equipment under Carbon Emission Constraints
Authors: Jiang Shao Hua , Deng Jiao
Published: August 2011

Selecting the correct equipment is a multifaceted cost and benefit evaluation process due to the complexity of today’s construction projects and lack of considerations of all factors. Based on the analysis of traditional influence factors on the selection of construction equipments, carbon emission constraints were introduced to facilitate green construction. These factors were divided into three categories, which are certain factors, soft factors and carbon emission constraints, based on their own characteristics. By the classification of the factors, their impact on the selection of the construction equipments was studied in detail, especially the carbon emission constraints was investigated from three aspects: relationship between the emissions of CO2 and fuel consumption, standard and regulations of CO2 and carbon tax. The purpose of this paper is to find the main influence factors and provide a basic theoretical reference to the selection of construction equipments for decision-makers.
Smart Structure Based on Continuous Optical Fiber Sensing Technique (Review)
Authors: Jin Wen Cheng , Wan Juan , Ding Qing Rong , Zhou Chang Dong
Published: August 2011

Continuous optical fiber sensing technique has the advantages of continuous measurement, corrosion preventing, anti-electromagnetic interference and high precision. This paper integrates continuous optical fiber into smart structure system. It combines the advantages of continuous optical fibers with self-adapting function of smart structures. It may have wide uses in engineering. But it is developing. It has some key technologies to be solved, such as the manufacture and embedment technique of special optical fibers, optimized arrangements of fibers, smart identification of the signal, analysis processing for enormous data and realization of self-adapting function.
Data Analysis and Application of Dam for Safety Monitoring Based on Wavelet Theory
Authors: Zhang Jian Wei , Song Yan Qing , Cheng Sheng Zhao
Published: August 2011

Damage diagnosis and safety monitoring of large hydraulic structures are becoming one of the hot and difficult research subjects in the present structural engineering circle. Based on the wavelet theory, the measured data of a dam is operated by wavelet transform separating in different frequency bands and signal de-noising,and then the effective information of structure settlement can be obtained from the measured data with noise.This paper introduces an effective method to eliminate the error for the survey data.
Analysis of Monitoring Results and FEM Calculation of a Foundation Pit with Pile-Strut-Anchor Supporting Structure
Authors: Yao Lan , Yu Li , Wang Hui
Published: August 2011

The paper based on a foundation pit with pile-strut-anchor supporting structure in order to analyze the deformation of the pit. With the aid of finite element method the curves of relationship between horizontal displacement of pile body and depth, the relationship between horizontal displacement of soil adjacent to excavation and time were obtained. And then the law of change was summed. The maximal displacement appeared on upper part of the pile or turned up on the top but incremental displacement became small. The deformation of soil adjacent to excavation was directly related to the stage of excavation and had the characteristics of phase change. Through comparative analysis the result of finite element method simulation was in conformity with monitoring results. Therefore we can claim that this calculating model is appropriate and supporting structure is safe.
Relation Research of Management Information System and Business Management Development
Authors: Shi Qi Ying
Published: August 2011

The management successful depends on the efficient decision. Moreover, the decision correctness is decided by the information quality in a large extend. This emerging subject of management information system is mainly researching in how to apply the modern computer and network technology to the efficient business management or even promote the management in the maximum limit. Management information system is the important symbol to achieve modernization for the corporate information management. The application of ERP (Enterprise Resource Planning), CRM (Customer Relationship Management) and electronic commerce is the significant method for the corporate information management. This article research the relation of management information system and corporate development.
Research on Time-Varying Behavior of Cement Grouts of Different Water-Cement Ratios
Authors: Yang Zhi Quan , Hou Ke Peng , Guo Ting Ting
Published: August 2011

The thesis presents an research on the time-varying behavior of cement grouts with different water-cement ratio of 0.5,0.55,0.6,0.65,0.7,0.75,0.8,0.9,1.0,1.1,1.25,1.0,2.0,5.0 and10.0 at 0 minute, 5minutes,10minutes,20minutes,30minutes,60minutes,respectively.This was to investigate the time-varying behavior of reheological parameters of cement grouts with different water-cement ratios.It confirmed that: consistency coefficient and viscosity are time-varying reheological parameters, while rheological index and initial stress(yield stress) are time-independent behavior;the flow pattern properties of cement grouts with different water-cement ratios could remain unchanged with time; the laws with time change of consistency coefficient and viscosity of cement grouts accord exponential function, cp(t)=c0×ekt (Power-law fluid) or hp(t)=h0×ekt(Newtonian fluid or Bingham fluid).These research results have very important realistic value and theory meaning.
A Study of Surface Morphology and Flexural Strength of Hemp Fiber Reinforced Composite with Recycled High Density Polyethylene Matrix
Authors: Lu Na
Published: August 2011

Hemp fiber has recently captured a significant interest in the science and engineering community because of its high specific strength and stiffness with an environmentally friendly feature. This paper reports a systematic study relating a specific surface treatment on hemp fiber with respect to the flexural strengths of the treated hemp fiber reinforced recycled polymeric composites. The flexural strength, strain, and modulus of rupture of the composite were tested on a constant rate of extension testing machine following ASTM standards. Surface morphologies of fiber and fracture surfaces of the composites were also observed using the Scanning Electron Microscope (SEM) and Fourier Transfer Infrared Spectroscopy (FTIR) technique.
Numerical Simulation of Deformation Pattern to Pile Raft Foundation
Authors: Chen Ya Dong , Wang Xu Dong , She Yue Xin , Cai Jiang Dong
Published: August 2011

ABAQUS is used to study the load-settlement characteristic and soil displacement field of the pile raft foundation. Numerical results are compared to the outputs from model test. The study results show that good consistency is obtained from the comparison of results between numerical simulation and model tests. Small pile space will weaken the single pile bearing capacity. The compress region is mainly centralized in the soil beneath the pile tip to the 3b space pile raft foundation, which presents a massive deep foundation failure pattern. As the increase of pile space, the compress region under cap shifts upward. The displacement influence depth of 6b space pile foundation is smaller than 3b space pile raft foundation, and it is destroyed by the lateral squeeze of the soil around piles.