bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Comparison Study of Stress Sensitivity at Different Levels of Permeability Core
Authors: Xue Yong Chao , Cheng Lin Song , Li Chen
Published: November 2012

Whether the stress sensitivity in the mid-high permeability is stronger than that in the low permeability reservoir is current hot debate, aimed at this question. 14 samples are selected to calculate the permeability loss rate separately in the laboratory simulation experiment, the results show that the absolute value of loss rate of the mid-high permeability core is higher than that of low permeability core, but the relative permeability loss rate is lower than that of low permeability core, which, namely, means the low-permeability reservoir has stronger stress sensitivity. The stress sensitivity curve in the high permeability reservoirs could be classified into the type model of "gentle", while the stress sensitivity curve in the low permeability reservoir could be concluded as the "first steep then slow " mode. Hence the bottom-hole flowing pressure must be controlled reasonably in order to keep the productivity well.
Practical Design Method of the Snow Load for the Low Rise Roof Structures
Authors: Meng Fan , Li Fang Hui , Gu Ming , Shen Shi Zhao
Published: November 2012

The large span roof structures need to be designed to withstand wind and snow loads. This paper presents practical design method of snow load for low rise roof structures in GB 50009-2001(China), ASCE 7-10, AIJ 2006, NBCC 2005 and Euro code 2003, and discusses approaches to improving consistency and uniformity of methods by comparison of the differences and similarities of wind and snow provisions in the codes of various countries.
Energy Variation Characteristics of Exploding Ground Motion within Typical Loess Field of China
Authors: Sun Jun Jie , Wang Lan Min , Tian Wen Tong
Published: November 2012

Based on in-situ observational data, we analyzed energy features of strong ground motion induced by short delay blasting in unsaturated loess field through three aspects of time history, frequency spectrum and attenuation. For time histories, the data show exploding ground motion has two essential characteristics, i.e. larger peak ground acceleration (PGA) and shorter duration. Analysis results reveal the effective duration (ground acceleration exceeding a certain magnitude) is the pivotal factor influencing design effects of the blasting. The spectral response, meanwhile, attenuates with the increase of observational distances (apart from the centre of exploding field), especially for those higher frequency components. Values of H/V figured relative features of horizontal component to vertical one of frequency spectrum of exploding ground vibration become greater while distances widen. As exploding energy accumulated, moreover, lower frequency energy distinctly increases and the feature of frequency spectrum of the strong shock gradually approaches an actual seismic oscillation.
Temperature Sensitivity Analysis of Massive Concrete Mixing with Slag Powder and Fly Ash
Authors: Wang Feng , Chen Chi
Published: November 2012

For concrete double mixing with slag powder and fly ash, in order to more accurately measure the temperature and crack, the calculation model of transient temperature field is established by finite element method, as taking the temperature controlling of massive concrete mixing with slag powder and fly ash of pile cap in Dongsha Bridge for example. The effect of cooling water temperatures and pouring temperature on temperature field of pile cap are analyzed. The results show that the cooling water temperature has less effect on central maximum temperature in early days, but more effect on cooling rate in late stage. The pouring temperature has more effect on maximum temperature. The temperature peak will rise with pouring temperature increasing, but the time of temperature peak arising is invariant.
The Pushover Analysis of R.C Frames Based on SAP2000
Authors: Li Jing , Yu Xing Hua
Published: November 2012

The pushover analysis had been done for a R.C frame model, vertex displacement、base shear 、 appear order and development situation of plastic hinges of the model had been get in different steps of pushover analysis, The pictures of basal shear-vertex displacement and response spectrum displacement-accelerated speed had been studied. The analysis results show that ,the R.C frame model correspond with the seismic design principle of stronger column weaker beam ’,and meet the seismic requirements of the first stage and the calculating resistance to collapse of the second stage.
Test and Finite Element Analysis on Dynamic Characteristics of Trestle Wharf
Authors: Sun Xi Ping , Zhu Zhen Yu , Zhao Bing Hao
Published: November 2012

The project intends to construct steel pipe piles on both sides of trestle wharf, and the soil vibrations caused by piling construction might have an important effect on the safe service of wharf. In this paper, the dynamic signals during piling construction were recorded and recognized by NExT-ERA. Meanwhile, modal analysis through finite element model of wharf was performed. Through a comparative analysis of the two results, the first two orders of frequency for wharf were obtained. The results would lay foundation for further analysis of dynamic responses of wharf when pile locations close to wharf.
Disscussions on Shape Determination of a New Space Beam-String-Structure with Outer Truss Torus
Authors: Yao Yun Long , Ma Guang Ying
Published: November 2012

Space beam-string-structure with outer truss torus is a new type of space structure. The new structural system is to reduce the space occupied by roof structure and could be laid by the rigid roofing material conveniently. Based on the local analysis method and the whole system balance, a simplified calculation method for initial prestress of ribbed grid space beam string structure were proposed when the cable curve equation was determined. An example was investigated and the results confirmed the feasibility of the proposed method.
Sensitivity Analysis of Durability Parameters of Concrete Structures Corroded by Chloride Ions
Authors: Zeng Li , Guo Yuan Cheng , Zhao Zhuo
Published: November 2012

For the pre-stressed concrete structure under marine environment，the stochastic characters of structure and environment such as concrete cover depth, initial chloride ions concentration, chloride diffusion coefficient in concrete, critical chloride ions concentration and structural surface chloride ions concentration affect the structural durability in designed service life greatly. Based on the diffusion mechanism of chloride ions, considering the durability failure character of pre-stressed concrete structure, the limit state function of durability failure is established, the sensitivity of durability influencing parameters is analyzed, and the Monte Carlo simulation is carried out based on the stochastic characters of influencing parameters, which will provide method and foundation for the structural durability design, construction and quality control of similar project.
The Architectural Style and Cultural Connotation of Lu Mansions in Kaiping of Guangdong
Authors: Selia Jin Hua Tan , Zheng De Hua
Published: November 2012

During late Qing and early Republican Periods, the Guangdong overseas Chinese people living in North America, Australia, New Zealand and Southeastern Asia came back to their hometown areas to invest and build homes for their families. Thousands of Lu mansions, dwellings for locals, were built during that period. There were three purposes for that construction boom, 1) to build a pleasant and home for their families remained home; 2) for the overseas Chinese themselves’ retirement, because they were not allowed to be naturalized as citizens in their adopted countries; 3) to build a place for their own pleasant retirement, as they believed “fallen leaves should return to their roonts”. Given these reasons, Lu mansions were constructed in a different way from local tradition vernacular architecture, in terms of floor plan, facade, techniques, decoration, and even the most sacred worshipping shrine as well. Taking the Lu mansions in Kaiping as case study, the authors attempt to analyze how the socio-cultural aspects affected local people’s living tradition through building village houses for their families.
Study on Ecological and Cultural Characteristics of Human Settlement in Bali Island, Indonesia
Authors: Xiang Xin Yi , Zhang Mei Hua , Li Zong Yi , Li Yuan Qing
Published: November 2012

In the process of rapid urbanization, there are many challenges people have to face. In this study, typical human settlements in Bali Island in Southeast Asia were introduced, and impact of ecological and cultural factors on human settlements in this region were especially investigated, aiming to provide inspirations to solve the problems related with rapid and uncontrolled urbanization in many other parts in Asia. Impacts of ecological and cultural aspects on style of housing building and private gardening and on public spaces were analyzed separately. It was concluded that ecological and cultural factors contribute much for both the preservation of context in traditional human settlements styles and preservation of ecological background in Bali Island.
Study on the Delimiting Methods of Protected Domains of Ancient Large-Scale City-Sites
Authors: Li Ying , Wang Chong En
Published: November 2012

By analyzing characteristics of each kind of ancient large-scale city-sites, pertinent delimiting methods on protected domains were proposed in this paper, mainly including qualitative method and quantitative method. Combining the two methods in specific practice shall be the most proper protected domains.
The Design and Development of a Child-Friendly Pedestrian Environment in School Zones
Authors: So Kab Soo , Shin Sung Woo
Published: November 2012

The purpose of this study is to develop a design for a user-centric commuting pedestrian (children, parents, and local residents) environment by moving away from administration-centric, safety-only designs via the extension of school zones. A plan is also developed to elevate the design to a practical level. Hence, this study is intended to develop a technique for the pedestrian environment that complies with user behavior characteristics, with a focus on the school-commuting path. Such a technique is anticipated to provide users with options to best utilize their space environment by inducing involvement in various activities. In addition, this study seeks to promote the vitality of the city and local community and enable a high-quality and enriched life for citizens by developing a rich and desirable city culture.
Designing Measures for the Sustainable Development of the Ecological City
Authors: Guo Hong Ling
Published: November 2012

Explores the overall planning of ecological cities, open space planning and micro space planning, induces the ecological city planning should consider the local natural environment and the place context, combined with the local hydrological geography and micro ecology ecology environment design area, and summed up the green community mode and ecological traffic system model.
Rural Industrialization, a Feasible Way towards Urbanization in China?
Authors: Ma Ji Ting
Published: November 2012

The assumption of rural industrialization is that as long as people can find a job with a reasonable pay in rural area, they will not immigrate into city. However, the labor market of rural industry is not competitive compared with urban labor market. What’s more, the regional discrimination has always been existed. Due to the vast rural population in China, it’s a good idea to urbanize rural area itself, however, it won’t be actual feasible without attracting people to live in. In China the situation is quite different from north to south. In northern China rural industries are seldom as competitive as southern Chinese rural industries. Southern China is the most developed region of China, Therefore its experience in rural industrialization may set up example for southern counties. This paper will discuss both the advantage and disadvantage of rural urbanization in China, by studying a specific case: Jiangyin, which is a fast developing rural area in Jiangsu Province.
Analysis on the Present Condition of Typical Buildings in Urban Villages in Zhengzhou
Authors: Wang Jing , Su Wei , Liu Cheng Cai
Published: November 2012

The safety survey on the urban village buildings in Zhengzhou shows that many reasons have caused the hidden dangers in the safety and reliability of the urban village buildings. Based on our survey data, this paper aims at providing theoretical references for the remolding and reinforcement of the urban village buildings and the future construction of the New Village in China, with an appraisement and an mastery on the safety and reliability of the typical buildings in urban villages in Zhengzhou.
Discussion on Land Use Planning of Modern Mixed-Use Industrial Parks - A Case Study of Sino-Singapore Guangzhou Knowledge City (SSGKC)
Authors: Wu Wei , Zheng Yong
Published: November 2012

Mixed-use industrial park represents a new development approach of the modern industrial parks. Complying with this tendency, the land use planning of Sino-Singapore Guangzhou Knowledge City (SSGKC) proposes land relevance, non-interference and proportion control principles; discusses various mixing-use modes of commercial service land, residential land and industrial land. The plan also put forward a new type of cluster using layout to enhance the mixed land uses and eventually shape up a new industrial park that well integrates city with Industrial Park and industry with residence.
Study on Modern Design Elements of City Context
Authors: Yan Jun
Published: November 2012

The aim of this study is to fine out urban context factors and analyze them, so that its developing can continue. Furthermore, through analyzing the four factors: natural environment, urban architecture environment, region civilization and technique, and discover the content and characteristic, grasp the connotation of urban context. It will provide service for city designing.
Thinking of Layout Planning and Construction of New Rural Primary and Secondary Schools — Taking Xinzhou District, Wuhan City for Example
Authors: Hua Qiu Yue , He Zhi Min
Published: November 2012

Taking surrounding rural areas of Wuhan for example, by the methods of literature research and field survey, through the investigation on 15 primary and secondary education resources in townships in Wuhan City, this paper researches main problems and predicaments behind combined settlements for demolished villages faced by rural primary and secondary schools and advances the guiding principles of layout planning and construction of new rural primary and secondary schools in the countryside in the middle of China based on the context of safety and health to promote the strategies of scientific planning and construction of rural primary and secondary schools.
Research on Protection and Restoration of Colored Paintings of Huixian Taoist Temple
Authors: Ye Jian Hua
Published: November 2012

Huixian Taoist Temple is the Taoist architecture heritage of Quanzhen Religion during Jin and Yuan dynasties. The colored paintings kept in four main buildings possess history and art value. Based on the investigation and mapping of the existing paintings, the protection and restoration plan is determined according to the comparison, analysis and value estimation. Further discussion is forwarded on the protection method with advanced scientific concept and new technology.
Experimental Study on Creep Life of Granite under Direct Uniaxial Tension
Authors: Wang Jin Xing , Zhang Kun , Liang Wei Min , Yu Yong Qiang
Published: November 2012

Experiments of direct tension creep on granite under uniaxial tensile stress condition were conducted to study the behaviors of long-term deformation and characteristics of acoustic emission. Test results indicate that there exists linear relationship between minimum strain rate and creep life on log-log coordinate, and that relationship between minimum strain rate and remaining creep life is also linear on log-log plot. According to the relationships, equations were developed to predict tension creep life of rocks. In the tertiary creep stage, there exists inversely-proportional relationship between axial strain and residual life, and the relationship was used to estimate residual life of a rock material.
The Research on the Overseas Chinese Local-Style Dwelling Houses Building – Kaiping Watchtowers for Example
Authors: Wang Shu Pei , Song Shan , Liao Xiao Li
Published: November 2012

At present, we still can see many beautiful buildings combining Chinese and western architecture culture in the hometown of overseas Chinese. Through the overseas Chinese local-style dwelling houses buildings are researched and analyzed, we can realize the collision and blend between two kind of building culture, and to realize the value of these buildings. In this, we take Kaiping in Guangdong one of home town of overseas Chinese as an example to do some research on the overseas Chinese local-style dwelling houses building, and to expatiate how to deal with the challenge better in today's diversification architectural culture world.
Controlling Thermal Radiation by Defect Mode of one-Dimensional Photonic Crystals Containing Negative-Index Materials
Authors: Wang Chang , Yang Na , Du Jun , Wang Le Xin , Zhu Wen Xia
Published: November 2012

A kind of different thermal radiation source which consists of photonic crystals (PCs) containing negative-index materials (NIM) coated atop SiC substrate was investigated theoretically by a transfer matrix method. The photonic crystals were inserted into a defect layer，and the wavelength range of them was tuned to approximately match with the wavelength range of the phonon absorption band of polar material SiC. So the structure can only radiate the light with same wavelength as the gap defect mode. By the calculation, the structure shows very sharp emissivity peak in a narrow wavelength band. The position of the emissivity peak can be effectively controlled by tuning the thickness of the defect layer. Due to the novel characteristics of the defect mode of gap, this kind thermal emission is predicated to have promising radiative properties.
Interactive Effects of Super Absorbent Polymer and Nitrate Nitrogen
Authors: Li Jia Zhu Li , Huang Zhan Bin , Feng Yuan Yuan , Chen Wei
Published: November 2012

The superfluous application and low use efficiency of chemical nitrate nitrogen fertilizer account for the nitrogen pollution of soil and water, threatening human’s health. In order to raise the fertilizer use efficiency, prevent from non- point pollution and nitrogen pollution of groundwater, and select superior material, five different kinds of super absorbent polymer (SAP) were selected as the objects. Through the analysis of the characteristics change of water and fertilizer absorbing of the five SAPs within different concentration of NO3--N, and the discussion of interactive effects between the SAPs and NO3--N, it is showed that: the water absorbent ability of all kinds of SAP exhibits a negative relationship with the concentration of KNO3 by decreasing of more than 50%. For all the five types of SAPs, the type of polyacrylate shows the strongest ability of water absorbing in all kinds of KNO3 concentration and the type of humic acid- polyacrylate is least affected by saline solution. The type of PAM- inorganic mineral SAP does well in nitrogen absorbing, whose absorbing amount linearly increases with the KNO3 concentration increasing, while the other types of SAP shows no obvious ability for nitrogen absorbing.
Study on the Effect of Fly Ash to Modified Bitumen
Authors: Yang Guang Jun , Luo Xu
Published: November 2012

Modified bitumen had been mainly studied in this thesis.The effect of the different quality ratio of petroleum asphalt/fly ash to SBS modified bitumen had been discussed.The effects of different aromatic oil and SBS to the properties of modified bitumen were also studied.The results showed that the ductility of modified bitumen can satisfy standard of SBS I－C by the addition of the ratio of asphalt and coal tar pitch in a certain range.When the different quality ratio of Petroleum asphalt and fly ash was 60/20，the comprehensive cost achieved the best value.
Micro-Macro Characterization of Granular Materials
Authors: Zhang Yan Qiong , Xu Xiao Min , Ling Dao Sheng
Published: November 2012

The intrinsic complexity of granular materials stems from the fact that the characterizing variables at the micro-scale and the macro-scale are of different nature. Macroscopically, tensorial variables (stress tensor, strain tensor, fabric tensor) are commonly used based on Representative Volume Element (RVE), while vectorial variables (contact force, contact displacement, contact normal) are adopted at particle-scale. This paper mainly discusses some basic characterizations for these two scales, as well as their correlations. Numerical simulations using Discrete Element Method (DEM) are then conducted to show the evolutions of both microscopic and macroscopic variables during monotonic loading. It is indicated that the particle reorientations in the dense sample are much more pronounced than that in the loose one during shearing.
Monitoring of Thermal Degradation of Fireproof Coating
Authors: Chrebet Tomáš , Martinka Jozef , Balog Karol , Hrušovský Ivan
Published: November 2012

Under the fire conditions, the resistance of cable distribution is required for a fixed period, depending on the intended use of the cable. To increase the fire resistance of cables a fireproof coating may be applied. Article deal with the behavior of the fireproof coating during elevated temperature. Concretely, the aim is monitored a coating weight change under the conditions of dynamically increasing temperature and with or without using air-flow. It is also monitored the change in weight, depending on the isothermal temperatures in dynamic air atmosphere.
Research on Mechanical Properties of C100 High-Strength Concrete Used for Frozen Shaft
Authors: Chu Hong Qiang , Jiang Lin Hua , Xu Ning , Xiong Chuan Sheng
Published: November 2012

The mechanical properties of C100 high-strength concrete used for frozen shaft were studied in this research. The results demonstrate that: The cementitious materials 570kg/m3 concrete 28 strength is only 104.5MPa, which is lower than the C100 requirements; the early strength (3d) of the concrete doped with 30% admixture is less than 20% admixture concrete, but with the age increase, its strength gradually reaches close to concrete doped with 20% admixture, and eventually exceeds the concrete doped with 20% admixture.The tension-compression of high strength concrete doped with 15% fly ash and 15% slag is the smallest, while the tension-compression of the concrete doped 10% fly ash and 10% slag reaches the maximum.The Poisson's ratio of C100 concrete is between 0.20 and 0.24; the compressive elastic modulus is about 50GPa; and the tensile elastic modulus is about 110GPa.
Study on Properties of Modified Asphalt by the Thermoplastic Elastomer (TPE) Compound
Authors: Chen Zhi Rong , Cao Dong Wei , Zhao Wen Zhong , Wang Bing Xing , Zhang Hai Yan
Published: November 2012

In this study, the thermoplastic elastomer (TPE) material was prepared for modifing asphalt by premixing the water rubber powder and SBS. Effects of the raw material mass ratio on the properties of TPE modified asphalt were investigated. The experimental results indicated that the mass ratio of water rubber powder and SBS have more important effects on the penetration,softening point,and ductility, viscosity, high-temperature storage properties, elastic recovery and dynamic rheological properties of TPE modified asphalt.
Application of New Lacquer Putty
Authors: Huang Nan Bei
Published: November 2012

Traditional lacquer putty has many shortcomings such as wastage of materials, easy cracking, hollowing and so on. We recommend a new putty named “red brick putty”. It’s made of polymer materials and multiple upscale auxiliaries. In compare with traditional technology, this new putty is cheaper and more reliable. It costs less labor and it also makes building low-carbon. The application of this new putty promotes economic development and environmental coordination.
Numerical Simulation on the Behaviors of Post-Embedded Bars in Reinforced Concrete
Authors: Yang Jian Hua
Published: November 2012

Prism pull-out test results was used to build anchorage bonding interface slip model(ABISM), with this model, the behaviors of post-embedded bars in reinforced concrete with different anchorage depth were analyzed by one-dimensional numerical method, and the calculation values was compared with the experimental values. The results showed that: the calculated value is in good agreement with the experimental values. this model can provides an important reference for anchor design.
The Research of the Basic Properties of Ceramisite Concrete
Authors: Yang Ding Yi , Yu Jun Bao , Gao Chao , Wang Le Le , Shen Tao
Published: November 2012

This paper expounds the ceramisite concrete fine characteristic, the development history, present situation and the existing problems. Using orthogonal design to study on the internal and external factors of compressive strength and dry apparent density and specific strength of ceramisite concrete. At the same time, using the professional Image analysis software of Image-pro plus to analysis and evaluate the uniformity of ceramisite concrete and its influencing factors were discussed.
Strength Analysis of BFRP Rebar Based on Kolmogorov–Smirnov Test and ANOVA Method
Authors: Ma Ming Lei , Wang Gui Ling , Miao Dong Mei , Lian Bao Yu
Published: November 2012

A very triditional and comprehensive understanding of the rebars’ static strength is that the strenth followes a normal distribution, no evidence or mathmatic test have adopted to prove that. This paper wants to bring a new idea to analyze the real true result to the former understanding. And finally a six more general distribution forms are used to give a provement which ignored in many strength analyis in China engineering community.During the provement, Fisher test and ANOVA method are studied carefully to suport the KS test.
Thermal Stress Analysis on Steel Bridge Deck with Epoxy Asphalt Concrete under Low Temperature Based on Viscous-Elastic Method
Authors: Zhou Huan Yun , Liu Yang
Published: November 2012

Epoxy asphalt concrete has been widely used in China as an excellent paving material on long-span steel bridges. Analysis of its low-temperature thermal stress can be a more accurate grasp of pavement low temperature stress condition. The bending creep test of epoxy asphalt mixture was carried out at low temperatures to obtain the creep compliances and determine the relaxation module. Then the principal curves of the relaxation module were regressed in a form of Prony progression expression by Matlab. The relaxation module was further converted to the parameters needed in the viscous-elastic module in ANSYS software. Finally, a three-dimensional full-scale Finite Element model for steel box girder and asphalt overlay was constructed to analyze the stress scenario under low temperatures for the duration of 48 hours. The maximum temperature stress was only 2.45 MPa at a temperature of -20.4°C and thus no shrinkage cracks will occur.
Computational Simulations of Dynamic Compaction of Dry Sand
Authors: Ding Yu Qing , Tang Wen Hui , Ran Xian Wen , Xu Xin
Published: November 2012

The computational analysis of plate impact experiments on dry sand utilizing the Mie- Grüneisen (MG) equation of state and the P-α compaction model were investigated in this study. A number of two dimensional axial symmetric computations were performed by using the hydrocode AUTODYN. The computational results were compared with the particle velocity on the back surface of the rear plate measured by the VISAR system and the first shock-wave arrival times detected by piezoelectric pins in the samples respectively. It was found that the P-α compaction model was more accurately reproduce the experimental data than the MG EOS.
Performance Comparison of Beams with Different Stirrups
Authors: Wan Hai Tao , Li Li
Published: November 2012

High strength concrete and high strength reinforcement technology have been quite mature,but there are still less in practical application of china.CRB550 grade reinforcement is formed by HPB235 reinforcement through cold-working, which strength is much improved,but ductility did not change much. 6 reinforced concrete beams with different stirrups are designed for low cyclic loading test. Contrasting the test results, in the elastic stage, beam with CRB550 stirrups and beam with HPB235 stirrups is very similar in bearing capacity and deformation performance.However, in the elastic-plastic stage, beam with CRB550 stirrups in bearing capacity and deformation performance is better than beam with HPB235 stirrups.Therefore, it is proved that CRB550 reinforcement can replace HPB235 reinforcement as stirrups in RC beams.
Breakage Characteristics of Granular Micaschist and its Fractal Description
Authors: Li Ke Gang , Liang Wei , Zheng Dong Pu
Published: November 2012

Taking the granular micaschist of a strip-mine as study object, a lot of compaction and breakage tests on granular rock materials were carried out at different grading conditions, on that basis, the breakage properties and its changing regularity were analyzed. Then, the feasibility using fractal dimension D to describe the breakage ratio and the relevances of D with coarse granule content and breakage ratio Bg and B5 were discussed. The results show that: (1) the greater initial coarse particle content is, the more obvious the broken degree of granular micaschist is, the higher the breakage ratio is. When the coarse particle content is less than 10%, the material grading curve before and after compaction is almost coincidence, that is, the broken phenomenon will no longer occur. (2)the change trend of fractal is inversely related to the coarse granule, that is D will increase with the decrease of coarse granule. But the fractal dimension D after breakage is bigger than pretest, and the rangeability of D before and after compaction has a positive correlation with the coarse particle content. (3)there is a better quadratic function elevance between D and Bg, B5, and the correlation coefficient of Bg and D reach up to 0.9997, it illustrates that using the fractal dimension to represent the breakage ratio of granular material is completely feasible.
Study on Test and Influence of Anti-Shear Strength of Asphalt Mixture
Authors: Wang Yi , Zheng Nan Xiang , Ji Xiao Ping
Published: November 2012

In order to further reveal the shear property of asphalt mixtures, shear device self-developed was used to research the variation and impact factor of anti-shear strength, cohesion and internal friction angle of different asphalt mixture types. The results show that: Modified asphalt can effectively improve the cohesion and anti-shear strength, but little effect on the internal friction angle; the internal friction angle and anti-shear strength of SAC-16 are greater than AC-16, but the cohesion is not significant different; with the nominal size of stone increased, the internal friction angle and anti-shear strength of asphalt mixtures rose, but little change in the cohesion; with temperatures increased, the anti-shear strength and cohesion of asphalt mixtures reduced gradually, but little change in the internal friction angle.
The Influence of the Corn Straw Content on the Physical Properties of Magnesium Oxycholride Cement-Based Board Materials
Authors: Ma Xin
Published: November 2012

This paper studies the effect of straw content on the density, thermal conductivity, water-absorbing rate, and water resistance properties of the board materials when increasing the content of corn straw in magnesium oxycholride cement-based board materials. The result shows that the density, thermal conductivity and water-absorbing rate of the magnesium oxycholride cement-based board materials increase as the corn straw content increases, however, its water resistance property decreases dramatically. In conclusion, when the corn straw content is 25%, softening coefficient of the magnesium oxycholride cement-based board materials drops to 0.65, the appropriate straw content is 25% at the most for the materials under this improved method.
Influence of Fine Aggregate on the Performance of Asphalt Concrete
Authors: Hao Xiu Hong , Zhang Ai Qin , Liu Zhi Guo
Published: November 2012

The performance of asphalt concrete mixed with 3 types of fine aggregate respectively (i.e. natural sand, limestone, basalt) are compared. The results of Marshall test and rutting test show that the high temperature performance of asphalt mixture mixed with basalt is the best, that of asphalt mixture mixed with natural sand is the worst, and that of asphalt mixture mixed with limestone is between the above two. The result of immersion Marshall test show that the water stability of asphalt mixture mixed with basalt and that of asphalt mixture mixed with limestone are similar, but better than that of asphalt mixture mixed with natural sand. Therefore, it indicates that the machine-made aggregate (of basalt or limestone) have better pavement performance and environment benefit than the natural sand.
Development of a Sustainable Aged Residential Model Considering Aged-Friendly Environmental Factors
Authors: So Kab Soo , Shin Sung Woo
Published: November 2012

Recently, aged residential designs throughout the world have begun to focus on the protection of residences for the aged by partnership with the local community in order to maintain the self-sustainable life of the elderly. As a result, various measures and infrastructure changes are being established to afford a comfortable residential life for the aged and to help solve the residential instability and health problems of the elderly. The purpose of this study is to develop a small multi-functional aged residential model that is based on local community involvement and one that can provide a sustainable residential environment for the elderly. In order to do so, this study will deduce aged-friendly environmental factors and identify the daily support services that are necessary in such a residential environment.
Zhejiang Residential Architecture Space Protection and Development Research
Authors: Zhao Bin , Yu Mei Fang
Published: November 2012

The analysis of present situation and characteristics of Zhejiang architecture space basing on documentation and field surveys. Today, in modern building developments, China is undergoing a transformation of architectural space. Zhejiang traditional vernacular architecture is facing damaging even mound-death threats. How to protect existing residential areas and develop Zhejiang architecture space is becoming a matter of great urgency. Takes Hu Xueyan residence in Hangzhou as example to study characteristics of Zhejiang architecture space. It also makes full use of modern technology and theory to dig into characteristics of Zhejiang architecture, ecological construction experience and ecological environmental awareness, which has referential significance in well protection and development of Zhejiang architecture space.
Study on Alkylation of Catechol with Ethanol by Al-P-Ti-O Oxides
Authors: Zhu Xiao Mei , Sun Bing , Huo Cheng
Published: November 2012

Vapour-phase alkylation of catechol with ethanol has been investigated over Al-P-Ti-O oxides prepared by non-uniform precipitation method. The catalytic activities decrease with the increase of P content. The catalytic activities increase with increasing Ti content, while the selectivity to guathol decreases. The results of XRD characterization demonstrate that the increase of titanium and the addition of additive affects the structure of the catalysts. The addition of additive (cane sugar or citric acid) decrease the catalytic activities of the catalysts, while increase the stability of the catalyst. Both the conversion of catechol and the selectivity to guathol decrease by the addition of additive, and the C-alkylation products increase obviously. The results indicate that the appropriate pores and surface area are enough for the title reaction, lager pore and higher surface area are favorable to C-alkylation products and stability of catalyst.
The Effect of the Chemical Osmosis on the Solute Transport in Geosnythetic Clay Liner
Authors: Lei Liu , Xu Shu Chao , Li Jiang Shan , Zhao Ying
Published: November 2012

The solute distribution was conducted by the compared analysis between the considered chemical osmosis and without chemical osmosis. The solute breakthrough time considered the chemical osmosis is larger than that without chemical osmosis. The transport process of the solute in GCL was presented, including the effect of the tortuosity and the hydraulic conductivity. The simulation results shown that the breakthrough time is greater with the hydraulic conductivity increased, while sparing the adsorb capacity of the GCL to the solute and increasing the permeation velocity of the solute.
Influence of Lead (Pb) on the Antioxidation System of Dishlia
Authors: Zhu Qi Hong , Xia Hong Xia
Published: November 2012

The method of culturing in nutrient solution is used to research the influence of lead on the antioxidation system of dishlia. Results show that lead treatment can change the content of chlorophyll, MDA, SOD, POD and CAT of dishlia. As the time of treatment goes by, their contents all exhibit a rise-fall pattern of change. Compared with the control plant, lead treatment is inhibitory at the initial stage of the experiment, but promotes growth at a later stage.
Correlate Toxicity Order Numbers with Metal Ion Characteristics through the Ridge Regression (RR) Method
Authors: Li Xiao Li , Wang Lan , Li Yu
Published: November 2012

In this paper, we use 9 ion characteristics (choose from 14 ion characteristics by correlation analysis) in 19 metals to construct the simulate model through ridge regression (RR) which can remove the high multicollinearity among the ion characteristics. Two multi-parameter regression models were established: the first multi-parameter QICAR model was used to distinguish the quantitative relationship between the ion characteristics and toxicity order numbers (TON). We can found that the parameters AN, Xm, AN/ΔIP, AW and Xm2r have positive coefficients, and AN and AW have the more contribution to the toxicity of heavy metals. The parameters ΔE0, |logKOH|, AR/AW and δP have negative coefficients, and δP does the most negatively influence to the toxicity. The second model we constructed to simulate the toxicity order numbers (TON) of metals that hard to test by experiment. The regression model provided the high simulate ability, with Nash-Suttcliffe simulation efficiency coefficients (NSC) of 0.94 for the modeling phase.
Effect of Pyrite Cinder on Calla Lily Antioxidation
Authors: Xia Hong Xia , Zhu Qi Hong
Published: November 2012

The effect of pyrite cinder on calla lily antioxidation was researched by solution culture method.The experimental result shows that compared with the control,using pyrite cinder can obviously increase plant chlorophyll content and promote the photosynthesis of calla lily.Along with treating time prolonging, SOD,CAT,POD and MDA contents all show ascending first and then descending,and they are all higher than plants that have not used pyrite cinder.It presents that pyrite cinder has strong influence on calla lily growth,and can promote plant growth.
Online Monitoring of Trace Copper (II) in Environmental Waters
Authors: Wei Liang , Dai Yi Chun
Published: November 2012

Based on the fact that copper can catalyze the fading reaction of neutral red reduced by hydrogen peroxide using the alanine as a sensitizer in NH4Cl-NH3•H2O medium (pH 8.0), a method was developed for online monitoring of trace copper in environmental waters by flow injection catalytic spectrophotometry. The experimental conditions were optimized. Under optimum conditions, the linear range of the proposed method was between 1.0 µg/L to 125 µg/L and the correlation coefficient of standard curve was 0.9995. The detection limit of the proposed method was 0.11 µg/L. The relative standard deviation of 2.7% and 1.5% was obtained by injecting 15.00 µg/L and 100.00 µg/L copper of standard solution respectively (n=8). The proposed method had been applied to determination of trace amounts of copper in environmental waters. The results were in good agreement with those obtained by atomic absorption spectrophotometry (AAS)
The All-Wind-Direction Computer Simulation on the Outdoor Wind Environment
Authors: Tai Hui Xin , Yang Yu Lan , Liu Fuying
Published: November 2012

This paper aims to investigate how the wind drection influence the outdoor wind environment. Fluent Airpak is used to simulate the wind environment of a residential area in Hangzhou city of China, the atmosphere boundary layer （ABL） is setted up as 16 wind direction with the mean velocity on each wind direction throughout the local typical year meteorological data. The simulation yield the data for the Maximum Wind Velocity (MWV) and the Amplification Factor (AF) Two main findings are:1)The MWV and AF vary greatly according to the wind direction setted up in ABL. 2)None of the wind directions which present to the maximum MWV and the maximum AF in the residential area is consistent with the wind direction with highest frequency in the local typical year meteorological data. Therefore, it is suggested that the outdoor wind simulation should be carried out by the all directions rather than the wind direction with the highest frequency.
Study on the Environmental Impact Assessment Index of Traffic Engineering Based on the Low Carbon Economy Perspective
Authors: Guo Qi , Li Dan , Fang Qing
Published: November 2012

The traffic engineering environment impact assessment generally considered the influence on environment of traffic engineering operation stage only, relatively ignored the influence on environment of traffic engineering construction stage and demolition stage. This paper gives comprehensive analysis on the influence on environment of traffic engineering at the view of the whole life cycle of traffic engineering. That is considering the influence on environment of materiel production stage, processing stage, engineering construction stage and demolition stage. The traffic engineering environment impact assessment index is established by considering a low carbon economy connotation and with the use of total life cycle analysis method, and the evaluation index of each specific quantitative index is given.
An Optimal Model for Low-Carbon Urban Agglomeration Based on Energy Structure Reduction under Uncertainty
Authors: Wang Lun , Sun Zhao , Wen Jing Ya , Li Zhuang , Zhao Wen Jin , Li Yu
Published: November 2012

This paper developed an optimal model of low-carbon urban agglomeration on the base of energy structure under uncertainty. The case study shows that the carbon intensity was decreased by [32.19, 41.20] (%) and energy intensity was reduced by [34.08, 43.19] (%) compared with those in 2010; meanwhile, the carbon intensity and energy intensity in the core area was reduced by [50.88, 54.11] (%) and [51.24, 54.57] (%) respectively, compared with those in 2010. The optimized scheme could not only meet the requirements of 12th Five-Year Planning Outline of Controlling Greenhouse Gas Emission, but also complied with the requirements of regional planning targets. The established model also provided more decision-making space for the sustainable development of low-carbon urban agglomeration.
SWOT Analysis of Development and Utilization of Ecological-Cultural Holiday Tourism Resources in Yesanguan of West Hubei Province
Authors: Li La , Liu Hong Lin , Dong Kun Peng , Li Rui Qi
Published: November 2012

The ecological-cultural holiday tourism resources are regarded as the most important and valuable ecological, economic and cultural resources, and play a great role, such as accelerating the tourism development, improving the regional distribution, optimizing the product structure, forming the high-grade tourism brand, promoting a harmonious society. the facing strength, weakness, opportunities and threats are analyzed by SWOT method for ecological-cultural holiday tourism of yesanguan in west Hubei. The strategic measures utilizing ecological-cultural holiday tourism resources in Yesanguan are proposed.
Analysis on Built Environment in Underground Shopping Malls in Chongqing in P.R. China
Authors: Li Wen Jie , Liao Xin Xue , Miao Gao Yang , Zhou Xin Zhi
Published: November 2012

To identify current situation of built environment in underground shopping malls, the study based on both field test and questionnaire investigation was carried out in underground shopping mall A and B in Chongqing in P.R. China. It analyzed the current situation of indoor thermal environment, light environment, sound environment as well as air quality. It found that the most prominent issue was indoor ventilation, and then air quality, thermal comfort and noise sequentially. Light and moisture problem was easy to be overlooked. Based on the current issues, it puts forward several measures to improve the built environment of underground shopping malls in this study.
Experimental Research on Human Metabolism in Hot Environment
Authors: Sun Yu Ping , Zhu Neng
Published: November 2012

In this study, the body metabolic rate of 10 volunteers performing light, medium and heavy physical labor was examined under different climatic conditions in a chamber. The climatic conditions referred to one group of comfort environment (25°C dry bulb temperature and 50% relative humidity) and three groups of thermal environment (30°C, 35°C, 40°Cdry bulb temperature and 90% relative humidity). The results reveal that for the same labor intensity, the human metabolic rate increases with the rise of environment temperature in the scope of 30~40 °C, 90%RH. The impact of environment temperature on metabolic rate increases with the rise of labor intensity. In addition, the classification of physical labor intensity upgrades when the environment temperature exceeds a certain threshold
Zoning Evaluation of Geological Hazard in YuLin Coal Mining Area
Authors: Yan Jian Long , Wang Jun , Song Shi Jie , Zhao Zhi Hai
Published: November 2012

As an important exporter of coal resources in China, Yulin has made great contribution to the repaid development of the national economy. But, the geological disaster item caused by large-scale exploitation of coal resources is becoming more and more serious. On the basis of county geological disaster investigation data in Yulin, the research analyzes and summarizes the type, scope, damage degree of the geological disaster in the whole city, especially coal area qualitatively and quantitatively. The article makes clear the spatial distribution of geological disasters in Yulin and it hope that the work can provide scientific guidance to geological disaster prevention in the future. By the research, we get several results as follow: first, There are 905 geological disasters points in Yulin and the mainly the types of all are Collapse, Landslide, Debris Flow, Unstable Slopes, and Ground Subsidence; Second, Collapse and Landslide are the major geological disasters type, and Ground Subsidence is the most serious hazard type in Yulin although its number is small. Third, according to the result above, the city has been divided into different geological disaster-prone areas with MAPGIS, and there are 11 high geological disaster-prone areas, 12 middle, 8 low and 3 undeveloped areas.