bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel Design of Experiments for Global Optimization of Light-Gauge Steel Wall Sound Isolation Systems
Authors: Lee Chao Tsung , Kuo Hsin Chuan , Lee Ping Ruei
Published: November 2012

In this paper, we develop a novel algorithm that determines the overall best parameter setting in design of experiments. The algorithm begins with successive orthogonal array experiments and ends with a full factorial experiment. The setup for the next orthogonal-array experiment is obtained from the previous one by either fixing a factor at a given level or by reducing the number of levels considered for all currently non-fixed factors. We illustrate this method using a light-gauge steel wall sound isolation system with four parameters, each with three levels. In previous work, the full factorial of =81 experiments was conducted and the best parameter settings was found. With the proposed algorithm, we found the same result using 15 experiments. As a further comparison, we obtained the optimum using a traditional Taguchi method, and found it corresponded to the of the 81experiments when sorted by the objective (or quality) function. We conclude the proposed algorithm would provide an accurate, fast, and economic tool for global optimization of design of experiments.
A Survey of Technologies for Climbing Robots
Authors: Yue Rong Gang , Wang Shao Ping
Published: November 2012

To replace human workers in dangerous environments or difficult-to-access places, climbing robots with the ability to travel on different types of surfaces (floors, walls, ceilings) and to walk between such surfaces were developed. The most important technology for a climbing robot is how to resist gravity, and adhere to surfaces. This paper presents mainly six types of adhesion technologies to ensure climbing robot sticks to wall surfaces: magnetic adhesion, vacuum suction techniques, attraction force generators, grasping grippers, bio-mimetic approaches inspired by climbing animals, and compliant electroadhesion, et al. Moreover, this paper represents advantages and limitations of adhesion technologies.
The Design and Implementation of Power Management Module for Satellite Service System Based on Self-Awareness Technology
Authors: Li Kang , Lei Yu , Wang Lei , Luo Yan Jing
Published: November 2012

This paper uses existing self-awareness technology and power management strategy to propose a new strategy for nanosatellite power management. We dynamically manage the power through the awareness of the target applications’ running state. Based on applications’ performance requirements we use DVFS to optimize power management. Finally, our strategy had helped to improve the power utilization rate of nanosatellite systems with expected performance.
Visual Thinking in Data Visualization
Authors: Zhu Ning Ning , Sun Sou Qian
Published: November 2012

A clear visualization program is to achieve the final design purpose by taking advantage of visual elements, such as color, line, space and etc. to convey the efficient information. This paper conducted research on the effective application of visual thinking on data visualization and proposed the correct methods to use visual imagery features and optimize visualization program to let creators use visual language and convey data content more accurately, and help users to understand information and make visualization content more efficient and profound.
Geometrically Non-Linear Formulation of Planar Flexible Multi-Beam Systems: Stiffness under Second Order Theory
Authors: Chu Bo Ce , Chu Zhong Yi , Cui Jing
Published: November 2012

The objective of this study is to develop computational efficient and accurate stress stiffening models that can be used in the dynamical formulation for the analysis of two-dimensional beams. The model which accounts for the tangent stiffness of beam element are derived using second order theory and continuum mechanics approach. Then, three stiffness matrix and two different force models that include different degrees of complexity are presented by expanding it to power series and truncating at quadratic terms. It is shown that the finite-element formulation of multibeam system can be significantly simplified as compared to the classical geometrical nonlinear method developed for the formulation in local element frame. Despite the simplicity of the new models, they account for elastic non-linearity in the strain-displacement relationship, therefore, they lead to more accurate results as compared to the more complex models which does not exactly account for the non-linearity. Numerical results are presented in order to demonstrate the implementation of the new models and test their performances through dynamical analysis of crank-slider mechanism.
Research on Urban Rail Transit Testing Simulation Platform Based on Minimum System
Authors: Ding Shu Kui
Published: November 2012

Urban rail transit is technology-intensive, comprehensive and complex system engineering. With the acceleration of the process of localization, the method which is now widely taken accredited identification and unit equipment, laboratory tests after the direct on-line applications has been gradually can not meet the overall requirements of reliability assurance. In this paper, we propose urban rail transit testing simulation platform based on the minimum system. It provides reliable technical support for urban rail transit system design and development, inspection and testing, operational analysis.
Tensile Capacity of Mechanical Bar Connection Corresponding to Detail of Screw on Bar Surface for Construction
Authors: Seo Soo Yeon , Yoon Seung Joe , Kim Sang Koo
Published: November 2012

This study is intended to investigate the performance depending on the screw type at the end part of reinforcement in the mechanical connection of high strength reinforcement with screws. Three types of mechanical connection were designed and tensile test was performed for those. The results presented that, although the end part of reinforcement was processed with screws, the reinforcement’s yield and tensile strength sufficiently appeared. But, its plastic deformation capacity after yielding fell 17~26% more than reinforcement.
Significance of Delayed Geochemical Hazard of Cd in Dawu River Domain in the Dexing Copper Mine, Jiangxi Province
Authors: Yang Yong Qiang , Wang Xiao Liang , Zhao Yuan Yi , Huang Lei , Zhang Yan Xia , Zhang Yu Fen
Published: November 2012

The smelting factory of Dexing Copper Mine is separated, so mine stripping material and low grade ore yards have huge impact on the environment. For a variety of reasons, the efficiency of operation of the environmental protection facilities in Dexing Copper Mine area was so low that all the acid wastewater was not treated well before discharge. This can lead to a problem that extracting copper and other metal mineral from the low grade ore in the waste stone, and also produce acidic wastewater and heavy metal pollution. Finally, the wastewater discharge into the Dawu River has made huge impact on water, soil, ecological environment. Based on the mathematical model of DGH, this paper analyzed the soil samples of Dexing Copper Mine in the Dawu River domain by the method of successive extraction. The results reveals the DGH characteristics of Cd element in the soil of downstream Dawu River. Cd element in the soil of downstream of Dawu Rive tends to shift from TRCP-Cd (total releasable content of Cd element) to TCAS-Cd (total concentration of active species of Cd element). The critical point of outbreak is TRCP=185.90 ng/g. 36% of the samples of downstream Dawu River oversteps the critical point of outbreak, making it possible to break out. Meanwhile, the analysis of DGH of Cd element is of great significance to early-warning of soil heavy metal pollution and improvement of ecological environment in the study area.
Comparative Optimization on the Focusing Methods of Solar-Electric Dish Stirling System
Authors: Lan Wei , Wang Bin , Feng Yi Ming
Published: November 2012

Nowadays, the high-speed economic development has caused significant consumption of energy. While the circumstance is getting severer, solar energy is taken as a kind of clean, environmental friendly resource with infinite storage that has aroused a wide public concern. Photovoltaic and solar thermal are two main categories of solar applications. Because of its high conversion efficiency, low emission and flexible installation, dish Stirling solar power technology is more preferable to be used among the solar thermal area. From the view of practical engineering application, this paper illustrates multiple focusing methods of the current dish Stirling solar power systems in detail, and the comparison of these methods are given to analyze their advantages, disadvantages and their application scenarios. It can be used for the future development of dish Stirling solar power technology and applied as a reference for large dish solar thermal power plants’ installations and tests.
The Study on Acceptable Capacity of Wind Power for Gansu Power Grid Based on Power Balance
Authors: Cao Xi Min , Xu Xiang Dong , Wang Fu Jun , Liu Tian Qi , Chen Zhen Huan , Lin Hai Ming
Published: November 2012

Randomness and volatility of wind power, the accepted capacity of wind power (ACWP) will become the wind power planning early first thing to consider with the increasement of the scale of wind power in grid. In this paper, we studied the correlation between wind power output and the change of daily load. The ACWP were analysis based on the power load characteristics, peak-valley difference of the Gansu Power Grid and power balance. The maximum installed capacity of wind power integrated of the five typical operating mode in 2011 is given. It is pointed out that ACWP is less than the planned capacity. At last, the specific measures to increase the ACWP are proposed.
Research on Model of Solid-Solid Reaction and Experiment
Authors: Zhao Ding Guo , Wang Shu Huan , Cui Xiao Jie , Zhang He Jun
Published: November 2012

In the paper, the reaction of solid-solid model was researched and we confirmed the reaction equation. The experiments in the lab shown that the t1/2 is 11.8min in the ferrosilicon reduction boron anhydride reaction at low temperature. The yield of boron is higher by direct reduction method smelting. In the boron oxide reducing experiment, the yield minimum is 76%, the maximum is 82%, and the average value is about 79%, which provides favorable foundation conditions for smelting amorphous mother alloy.
Electric Power Tower Inclination Angle Detection Method Based on SIFT Feature Matching
Authors: Yu Ping , Dong Bao Guo , Xue Yu Juan
Published: November 2012

In video monitoring system of substation, in-process video inspection is used to detect abnormalities and provide corresponding solutions in a timely manner to avoid failures.As the common equipment，electric power tower’s inclination should be detected timely..It was hard to check the fault of tower inclination timely and accurately only by staff’s routine inspection,and it will spent much manpower and material resources by the manner of sensor. A manner of substation video inspection tower inclination angle detection based on SIFT feature matching and OTSU was presented in this paper. The tower inclination angle was calculated through the matched feature points. As is proved in the simulation test, this algorithm features simplicity and it can detect the maximum angle in all case of inclination .
An Approach for Data Analysis of Multi-Group Metabonomics Base on Hierarchical-PCA
Authors: Huang Li Xin , Li Yang , Zhang Qi Yun , Li Bing Tao , Shang Guang Bin , Zhao Yi , Xu Guo Liang , Nie Bin
Published: November 2012

Datasets of metabolomics of multi-group are becoming increasingly complex, hard to summarize and visualize. Hierarchical Modeling makes the data dimensionality reduction and interpretation much easier by principal component analysis (PCA). Dose-response curve is drawed with the principal component score values. As an example, dataset from Ma Xin Shi Gan Tang (MXSGT) water extract administrated rats plasma collected by LC/MS/MS was used to demonstrate this method. As a result, Hierarchical Modeling based on PCA was proved to be an effective, time saving method for data purification.
Biological Effects of Color Lighting for Different Ages
Authors: Ju Jia Qi , He Long , Li Ze Bin , Wu Zhong Hang , He Zhi Jiang , Liang Rong Qing
Published: November 2012

The effects of lighting have extended to non-visual biological field since the intrinsic photosensitive retinal ganglion cell (ipRGC) was discovered at the beginning of 21st century. More relationships between lighting and health issues have been found since then. In this study, heart rate changes of both the young adults (about 25 years old) and the old adults (about 65 years old) who were exposed to dim lighting with different color (440nm, 460nm, 490nm and 510nm) were recorded. Significant statistical differences were found in the group of young adults, but no difference was found in the group of old adults. The analysis shows that the total light power entered into the eye is more reasonable to evaluate the non-visual effect of heart rate change. As one of the important non-visual effects of lighting is to synchronize the circadian rhythm, the results suggest that even dim color light can show biological effects on the young adults and the elderly may need more light to have the identical effects.
Investigation of Coordination Interaction of Trigonal Schiff Base Compound with Zn(II) Ions in Organized Molecular Films
Authors: Jiao Ti Feng , Zhou Jing Xin
Published: November 2012

In order to investigate the supramolecular assembly and coordination interaction of special amphiphile, a trigonal Schiff base compound with long alkyl chains was designed and synthesized, and its supramolecular assembly and interaction properties were investigated by spectral and morphological measurements. It was found that the Schiff base compound can be spread on water surface to form stable monolayer. When on the Zn(II) ions subphase, an in situ coordination can occur for all ligands. As a result, a 1:2 complex was formed for the trigonal chain Schiff base with Zn(II) ions through the coordination interaction. Due to the directionality and strong matching of coordination, two Zn(II) ions can be encapsulated into intramolecular space of the trigonal Schiff base compound.
Comparison of Multivariate Calibrations for the Determination of Soluble Solids Content of Tea Beverage Using UV-VIS-NIR Spectroscopy
Authors: Luo Wei Qiang , Yang Hai Qing , Dai Wei Cheng
Published: November 2012

Ultra-violet, visible and near infrared (UV-VIS-NIR) spectroscopy combined with chemometrics was investigated for fast determination of soluble solids content (SSC) of tea beverage. In this study, a total of 120 tea samples with SSC range of 4.0-9.5 ºBrix were tested. Samples were randomly divided for calibration (n=90) and independent validation (n=30). Spectra were collected by a mobile fiber-type UV-VIS-NIR spectrophotometer in transmission mode with recorded wavelength range of 203.64-1128.05 nm. Various calibration approaches, i.e., principal components analysis (PCA), partial least squares (PLS) regression, least squares support vector machine (LSSVM) and back propagation artificial neural network (BPANN), were investigated. The combinations of PCA-BPANN, PCA-LSSVM, PLS-BPANN and PLS-LSSVM were also investigated to build calibration models. Validation results indicated that all these investigated models achieved high prediction accuracy. Especially, PLS-LSSVM achieved best performance with mean coefficient of determination (R2) of 0.99, root-mean-square error of prediction (RMSEP) of 0.12 and residual prediction deviation (RPD) of 15.16. This experiment suggests that it is feasible to measure SSC of tea beverage using UV-VIS-NIR spectroscopy coupled with appropriate multivariate calibration, which may allow using the proposed method for off-line and on-line quality supervision in the production of soft drink.
Micro Line Quality Measurement Based on Normally Scanned Digital Image
Authors: Cui Xiao Meng , Chen Guang Xue , Wang Huan Mei , Chen Lin Lin
Published: November 2012

In this study we present a new framework to assess line micro quality of multicolor prints adapted to a low-cost image quality analysis system based on common flatbed scanner. The contribution elements including quality metrics, measurement principle, applying methods and detection instrument, which were complemented and sorted in terms of ISO 13660 standard, were described and a case experiment was conducted to survey the output performance of both inkjet printer and xerographic printer, two most popular digital printing technologies. Their qualities were compared in details rendering angle such as width and straightness of line, raggedness and blurriness in line edges, as well as darkness and contrast in color. The results verify the efficiency and shortcomings of the framework. Meanwhile, the metric values let us take an investigation in the character of each digital printing technology in micron size.
Design of ECG Signal Acquisition and Processing Circult
Authors: Ma Jing , Xu Jun , Xu Hai Bo , Wang Yu , Yin Sheng Xu
Published: November 2012

ECG signal is, as a vital method performed on the heart study and clinical diagnosis of cardiovascular diseases, an important human physiological signal, containing the human cardiac conduction system of physiological and pathological information. Aiming at the weak low frequency characteristic of ECG signals, the core circuit based on the AD620 and LM324 amplifier is given. After analyzing the major components of the ECG signal and the frequency range of interference, weak ECG signal collected by the electrodes is amplified by the preamplifier circuit, and the interference then is wiped out by using a low-pass filer, a high-pass filer, 50Hz notch filer and back amplifier circuit, finally a right wave of ECG is received. The characteristics of the system features the merits of high input impedance, high CMRR, low noise, less excursion and high SNR(signal to noise ratio), low cost and so on.
Physical Insights into the Fields upon the Superstrate-Loaded Cylindrically Conformal Microstrip Antenna
Authors: Tao Zou
Published: November 2012

A specific form of the spectral-domain Green’s functions for the superstrate-loaded cylindrically conformal microstrip structure is developed through the rigorous full-wave analysis. The incident fields produced by the known radial current source along the thin probe are also deduced in this special structure for the first time. Ultimately, with these considerations above, the surface current distribution can be obtained by the Method of Moment.
Nondestructive Discrimination of Grape Seed Varieties Using UV-VIS-NIR Spectroscopy and Chemometrics
Authors: Yang Hai Qing , Luo Wei Qiang , Wang Wen Jing
Published: November 2012

Classification of grape seed species is a useful tool to obtain seeds with desired quality traits. This study aimed at rapidly and nondestructively discriminating four varieties of grape seeds using ultra violet, visible and near infrared (UV-VIS-NIR) spectroscopy with wavelength range of 210­1100 nm. A hundred twenty grape seed samples were divided for calibration (n=80) and validation (n=40). The spectra were subjected to a principal component analysis (PCA) with the leading 10 principal components (PCs) used to build calibration models. The obtained PCs were treated by linear discriminant analysis (LDA), artificial neural network (ANN) and support vector machine (SVM) to build various discrimination models. Validation results showed that the PC-LDA model developed for the full range of UV-VIS-NIR achieved better performance than those developed for partial wavelengths, i.e. UV, VIS, NIR, UV-VIS, and VIS-NIR. The PC-LDA model with 8 PCs achieved best performance with 100% discrimination accuracy. This experiment suggests that the UV-VIS-NIR spectroscopy coupled with PC-LDA calibration method is promising for the nondestructive discrimination of grape seed varieties.
The Application of EMD in Dynamic Water Level Measurement
Authors: Guo Hui , Lou Guo Huan
Published: November 2012

Due to the water liquidity and undulation in irrigation channel as well as the vary kinds of external disturbances, the value of water change couldn’t be smooth. The signal of water level measuring is a nonlinear, non-stationary signal. In order to improve the measuring precision of water level, in the processing of water level measurement signal, the algorithm of Empirical Mode Decomposition is introduced. It can optimize the water level measured values and reduce the influence of the water wave to the water level measurement. Experiment shows this method is effective to improve the measuring precision of water level.
Effects of Sintering Route and Flux on the Luminescence and Morphology of YAG: Ce Phosphors for White Emitting-Light Diodes (LEDs)
Authors: Han Tao , Cao Shi Xiu , Ma Ming Xing , Zhu Da Chuan , Zhao Cong , Tu Ming Jing , Zhang Jin , Zheng Shi Yuan
Published: November 2012

YAG:Ce phosphors were synthesized by co-precipitation method. The photoluminescence intensity of samples sintered by the two-step route increases by about 10%, and with 0.5 wt.% NH4Cl added as flux, surface morphologies and size distribution are improved. The white LEDs were fabricated using as-obtained phosphors. It shows natural white light with chromaticity coordinates of (0.3083, 0.3163), color temperature (Tc) of 6886 K, the average CRI of 75, and the luminous efficacy of 85 ml/W. Therefore, The as-obtained YAG:Ce phosphors could be regard to have potential application in white LED devices.
Interrelated Characteristics and Simulation of the MIMO Channel
Authors: Zhang Xiu Zai , Chen Xi , Guo Ye Cai
Published: November 2012

In order to study the effects of the parameters from the array antenna on MIMO channel spatial correlation and channel capacity. In this paper, the spatial correlation between the transceivers at both ends of the antenna array for MIMO channel was theoretically analyzed with a random wireless MIMO channel model based on an intuitive physical meaning, as well as antenna spacing, the wave angle of arrival, angle expansion space parameters on MIMO channel spatial correlation and channel capacity were analyzed, and which was described through simulation experiments. The computer simulation results show that the theoretical analysis is correct and reasonable.
Corrosion Characteristics of 2205 Duplex Stainless Steel in High Temperature and High Pressure Environment Containing H2S/CO2
Authors: Zheng Shu Qi , Chen Chang Feng , Chen Li Qiang
Published: November 2012

The corrosion characteristics of 2205 duplex stainless steel in high- temperature and high-pressure (HT and HP) environments containing H2S/CO2 are investigated in this paper. After corroded 720 hours in the condition of 3.5 MPa H2S, 3.5 MPa CO2, 205°C, 15% NaCl and a sulfide content of 3g/L, one layer of comparably thick corrosion product are formed on the surface of the specimens. The corrosion products, which are relatively porous, lose its protection to the matrix. Lots of pitting are found on the surface of the steel and intercrystalline fracture and transcrystalline fracture are generated in the bottom of the pitting, which indicates its high sensitivity to stress corrosion crack (SSC). Also, the phenomenon of selective corrosion, a priority corrosion of α phase and minor corrosion or non-corrosion of γ phase, is observed after the corrosion process.
Design and Optimization on Train-Ground Wireless Communication of Passenger Information System of Urban Rail Transit
Authors: Yu Xin
Published: November 2012

This paper briefly introduces train-ground wireless communication technology of Urban Rail passenger information system. Analysis several kinds of external interference in train-ground wireless communication engineering application: Same frequency interference, multipath interference and other electromagnetic interference. Proposes the anti interference measures. Proposes design principle and deployment solution of wireless access points.
MMW Radiometric Image Feature Extraction for Security Inspection
Authors: Wang Qi , Zhang Guang Feng
Published: November 2012

Millimeter-wave (MMW) radiometric imaging system is widely used in the field of military and civil affairs. It can be used to detect concealed objects hidden under clothing. Based on MMW radiation imaging method and morphology theory, we presented a complex morphology filter to do the image pretreatment. Then used the Canny operator to extract features from concealed objects. The results show that the morphology algorithm can improve the quality of radiometric images. Meanwhile, Canny algorithm can detect the edges of object well.
Experimental Study on Long-Term Exposure of Concrete in Magnesium Sulfate Solution
Authors: Li Feng Lan , Ding Xin Xin , Jin Li Hui
Published: November 2012

Tests were carried out to study the concrete attacked by magnesium sulfate solution. The concrete specimens were exposed in the magnesium sulfate solution with three different concentrations for 360 days. At the exposure times of 90 days, 180 days, 270 days and 360 days, the properties of concrete such as the mass change, the compressive strength and the tensile strength were measured, and the contents of sulfate-ion diffusing into different depths of concrete were determined. Their changes with the solution concentration and the exposure time are analyzed in this paper, which could be used as reference for the protecting of concrete against the attack of magnesium sulfate.
Influence of Surface Treatment of Testing Specimens on Spacing Factor
Authors: Kostelecká Michaela , Kolisko Jiří
Published: November 2012

The measurements of spacing factor on different surfaces are demonstrated. Using of the confocal laser raster microscope Lext OLS 3000 for the spacing factor measurement is described. The different surface treatments and their influence to the spacing factor determination are discussed.
A Study on Structure and Properties of Basalt Fiber
Authors: Shi Feng Jun
Published: November 2012

The structure and properties of a kind of domestic continuous basalt fiber is analyzed in the paper. Chemical composition, crystal structure, thermal properties, flammability, mechanical properties and morphology of the fiber are investigated. Element analysis experiment shows that the basalt fiber is a kind of aluminosilicate fiber which mainly composed of the oxides of such elements as Fe, Si, Ca, Al, K, Mo, Ti, Ba and so on. X-ray diffraction indicates that the bulk structure of the fiber is non-crystal with short range order. SEM observation finds that basalt fiber is circular in cross-section and smooth in longitudinal direction. Solubility experiment reveals the superior resistance of the fiber to acids, alkaline and organic solvents. DGA demonstrates there are three weight loss stages in the process of elevating temperature. There are, respectively, evaporation of moisture in the fiber at about 100°C, decomposition of the residual carbonate minerals between 480°C and 630°C, and decomposition of newly generated carbonates between 850°C~995°C. In heatflow curve, there are also three endothermic peaks in which the first and the second correspond to the last two stages of weight loss and the third corresponds to melting process of the fiber and it onsets from 1122.14°C, comes to its peak value at 1194.96°C and ends at 1380°C. The tensile strength of the basalt fiber is better than S-glass fiber, worse than carbon fiber. Flammability of the fiber is also analyzed.
Orthogonal Test on Large Content of Solid Waste in Building Binder
Authors: Liu Huan Qiang
Published: November 2012

With the compound system of fly ash and aluminum slag as the main material, activated through ordinary activator, a type of building binder in which wastes is more than 80 percent is studied in the paper. The ratio of the activator is optimized through orthogonal test. Experimental results show that the active component in the solid wastes can be greatly activated under the mixture proportion as following: 10% lime, 4% gypsum, 0.5% sodium carbonate and 0.5% sodium sulfate. The cementing medium has enough strength to meet the requirements in construction engineering. Material of the cementing medium has the advantage of easy availability, low cost and high rate of waste utilization. It will be a kind of green building materials with a great expect.
Numerical Simulation of Bond Properties of Steel Bars in Concrete with Machine-Made Sand
Authors: Zhao Shun Bo , Ding Xin Xin , Liu Shi Ming
Published: November 2012

Based on the experimental studies, finite element models were built using ANSYS software to simulate the bond properties of steel bars in machine-made-sand concrete (MSC), which considered the nonlinear bond behavior of interface between steel bar and MSC. The concrete strength and the bond length of steel bar are considered as the main parameters for calculation. The complete bond-slip curves of plain and deformed steel bars are well simulated comparing those obtained from the experimental studies. The study gives an theoretical method to analyze the bond properties of steel bar in MSC.
Experimental Research for Flexibility Properties of RC Beams Strengthened with Steel Wire-Polymer Mortar
Authors: Zhao Chi Yun , Huang Shi Min , Yao Qiu Lai , Chen Ya Jing
Published: November 2012

This paper presents the results of the experimental investigation on the flexural performance of beams strengthened with steel wire-polymer mortar. A total of five rectangular doubly RC beams were constructed and tested to failure. The test variables were numbers of reinforcement layers and configuration. A new accurate method to measure elongation of steel wire was proposed. Then the interfacial bond strength between concrete and polymer mortar was tested. The failures of the specimens were all bending failures and polymer mortar layer debonded from beam was not occurred. Only a few wires were pulled off in failure. The polymer mortar and concrete has a better bonding effect. Steel wires play the more effective tensile roles of themselves. After strengthened, the RC beams improve their bending bearing capacity and bending stiffness, delay the cracks occur and crack development.
Testing Researches on Mixing Proportion of Consolidator-Mixed Pile Composite Foundation
Authors: Zhang Guo Zhi , Xun Dong Liang , Ji Fu Quan , Yang Zhao
Published: November 2012

By the laboratory tests of mixing proportion, this paper contrastively analyzes the consolidation instances of silt with HEC, HAS and cement, also emphatically discusses the influence regularities of the unconfined compression strength of solidified silt with the following factors such as the dose of consolidators and the curing time, which provide reliable data for situ tests. According to the test results in site, the optimum mixing proportion for consolidator-mixed pile is HAS with 12% dose. The result can be used as reference for the optimum mixing proportion design of consolidator-mixed pile composite foundation.
Study on Settling Efficiency of Sedimentation Basin of Coca Codo Sinclair Hydropower Station in Ecuador
Authors: Guo Xuan Ying , Chen Song Wei , Sun Dong Po
Published: November 2012

Ecuador is located in South America, and sediment of CCS hydropower station is mainly volcanic ash. This paper makes a study on settling efficiency of sedimentation with the quasi-hydrostatic settlement method and unsaturated sediment discharge method. The result shows that settling efficiency of the two methods are close to each other. Further more, the paper makes a study on settling velocity in different calculation methods, including the method of hydraulic engineering design manual, Zhang Ruijin calculation method and method of the United States Army Corps of Engineers. The settling velocity of volcanic ash under the weak alkaline condition and the influences of temperature on settling velocity are studied by testing. It can provide a reference for design of hydropower station in the surrouding area of South America
Luffa Sponge as a Sustainable Engineering Material
Authors: Shen Jian Hu , Xie Yi Min , Huang Xiao Dong , Zhou Shi Wei , Ruan Dong
Published: November 2012

The paper presents the first scientific study of the stiffness, strength and energy absorption characteristics of the luffa sponge with a view to using it as an alternative sustainable engineering material for various practical applications. A series of compression tests on luffa sponge columns have been carried out. The stress-strain curves show a near constant plateau stress over a long strain range, which is ideal for energy absorption applications. It is found that the luffa sponge material exhibits remarkable stiffness, strength and energy absorption capacity that are comparable to those of some commonly-used metallic cellular materials. These properties are due to its light-weight base material, and its structural hierarchy at several length scales. Empirical formulae have been developed for stiffness, strength, densification strain and specific energy absorption at the macroscopic level by considering the luffa fiber as the base material. A comparative study shows that the luffa sponge material outperforms a variety of traditional engineering materials.
Analysis of Influence Factors of Irrigation Method in Detecting Compactness of Canal Bank
Authors: Kang Ying Bin , Huang Kun , Rjap Abdurxt
Published: November 2012

This paper introduces the actual operation method of detection of the degree of compaction of the canal bank by using irrigation method and summarizes the project experience of detection of the degree of compaction of the canal bank. Taking a channel engineering as an example, some influencing factors of the irrigation method to detect the density of gravel soils are analyzed, and the application of irrigation method in dry density test of the gravel soils is discussed.
Analysis on Axial Stresses of Crossbars on Aqueduct
Authors: Bai Xin Li , Li Jiang Yan , Ma Bing
Published: November 2012

By use of finite element method, the axial stresses of crossbars on the top of a simply supported rectangular-sectioned aqueduct were calculated in this paper. Three factors were considered, namely height-width ratio, water depth and crossbars spacing. The results show that, most crossbars are in compression when the height-width ratio of aqueduct cross-section is small, and with the height-width ratio increasing, the axial forces of crossbars change from compression to tension; Under a certain height-width ratio, when water depth is relatively small, most crossbars are in compression, and with the increase of water depth, axial forces of crossbars change from compression to tension; big axial tensile force is harmful to the rectangular cross-section floor (mid-span), but favorable to the side wall bottom. The obtained change rules of axial force and the influence of axial force on aqueduct body stress can be referenced to aqueduct design.
Experimental Study on Flexural Toughness of SFRC
Authors: Li Chang Yong , Song Li Sha , Sun Li , Cao Chen Jie , Xing Tong
Published: November 2012

This paper introduces the test results of the flexural performance of CF40 steel fiber reinforced concrete (SFRC) designed by the binary superposition mix design method. The flexural strength and flexural load ~ deflection curves were got from the test SFRC specimens with the different fraction of steel fiber by volume and the different thickness of cement paste wrapping steel fibers. The effects of the fraction of steel fiber by volume and the thickness of cement paste on the flexural strength and toughness of SFRC are analyzed. It is demonstrated that the flexural toughness of SFRC increases with the increase of the fraction of steel fiber by volume, the reasonable thickness of cement paste wrapping steel fibers is 1.0mm.
Australian Seaport Infrastructure Resilience to Climate Change
Authors: Kong Daniel , Setunge Sujeeva , Molyneaux Thomas C.K. , Zhang Guo Min , Law David W.
Published: November 2012

A research project continuing at RMIT University is exploring the resilience of port structures in a changing climate. Research completed to date comprises of identifying types of port infrastructure vulnerable to climate change, establishing materials and exposure conditions, developing deterioration models based on current knowledge to simulate the effect of climate change on key port infrastructure and modeling the selected elements of infrastructure to derive outcomes which will aid in decision making in port infrastructure management. A considerable effort has been concentrated on identifying input climate data most appropriate for the models developed. The modeling approach is presented in this paper for quantitative projections of damage probability on port infrastructure taking into account the variability of material type, design considerations and environmental exposures with a changing climate. This paper provides a summary of the research undertaken in the development of material deterioration models and their responses to a changing climate load. Using climate information drawn from historical weather records and future climate projections, existing deterioration models were refined to include climate data into modeling runs in order to analyse changes to deterioration rates of different materials when impacted by a change in climate variables. Outputs from this modeling process will assist port authorities in making informed decisions on maintenance and capital budget planning allowing for impacts of climate change.
Constitutive Model Based on Damage Mechanics of Fiber Reinforced Concrete (FRC): A Review
Authors: Zhang Duo Xin , Wang Qing Yun
Published: November 2012

In order to study the constitutive model of fiber reinforced concrete (FRC) for future, this paper emphasizes on three aspects. FRCs constitutive model based on damage mechanics has been reviewed. The knowledge and development of constitutive models is discussed based on its historical developments and logical relations. Damage model of FRCs which has been developed in recent years is summarized at macro and micro levels. The development trends of constitutive modeling for FRCs are suggested on the basis of our understanding of essential physical properties of FRC, e.g. its nonlinearity
Study on Influencing Factors of the Elderly Population Crossing Speed
Authors: Yin Chun’e , Song Xiao Na
Published: November 2012

With China's entering aging society, the traffic problem of the elderly population has become the focus of public attention. Taking the elderly population of Zhengzhou as the study object, the speeds of the elderly population crossing the street was investigated. Based on the study, the differences in age and sex, traffic environment and signal control affect the speed of the elderly population crossing the street.
Determination Optimum Pipe Diameter Method of Tree Path Heating Pipe Network
Authors: Wang Mei Jie , Di Wei Min , Wang Yan Ke
Published: November 2012

Economy and hydraulic stability of piping network which has a fixed structure depend on the matching ability of pipe diameter. In order to improving the matching ability and maneuverability of selecting pipe diameter, a new design method is presented. A real case study shows that the piping network which is designed with the new method has excellent technical quality and the least life cycle costs, and can achieve saving more than 7 percent against the original design.
Orthogonal Enumeration Method for Optimum Seismic Strength of Water Supply Network
Authors: He Shuang Hua
Published: November 2012

Considering the unit seismic reliability and node water head of the water supply network after the earthquake as control parameters, the method of optimum seismic strength is developed to make the system’s nodal pressure shortfall or strengthening expense minimum. According to the function requirement and earthquake disaster character of the water supply network, the system’s seismic strength is changed into optimum problem with fewer discrete varieties, and the difficulty of solving large nonlinear scheme can be avoided by adopting orthogonal enumeration method. The presented method is tested to be feasible and effective in optimum seismic strengthening of water supply network.
Study on Construction Technology of Geogrid Treatment for Slope of Swelling Rock
Authors: Gao Ying , Zhao Ting Hua , Bao Jie
Published: November 2012

Combined with the Luwangfen test section in the Middle Line of SNWT, the geosynthetic reinforcing technology which is an efficient treatment measure for channel slope in expansive soil region was studied by in-situ experiment. The raw material, operating sequences, standards and testing for construction were systematically researched and summarized. The results provide valuable reference for the similar project construction.
Influence of Compaction Density of Soil Mass to the Seepage Build Capacity of Rain and Drainage Design Parameter
Authors: Zhao Fang Ran , Cai Zi Liang , Zhang Tian Wang
Published: November 2012

To reduce the pressure of rain efflux in the airport, and make full use of the resources of rain, the adjustment relationship between seepage build capacity of the soil surface area and rain convergence is studied. The condition of constraints between surface rain gradient and emissions is analyzed, according to airfield drainage design. The method to determine the ratio of the seepage area and non-seepage area is proposed to take full advantage of the rainwater seepage build capacity of soil surface area. Experiments have been performed to study the influence of infiltration rate of compaction density to clay and silty soil. The experimental results show that the soil infiltration rate decreases linearly with the increase of soil compaction, and reduces very fast at the first 30min of rainfall. It is recommended that the infiltration rate of rainfall on the first 30min can be used as the design parameter in the drainage design in the airfield. The influence coefficient reflecting the influence of compaction density to soil infiltration rate has been proposed.
Application of New Soil Consolidator in Road-Construction Engineering
Authors: Zhang Hong , Xun Dong Liang , Yang Zhao , Ji Fu Quan
Published: November 2012

This paper contrastively analyses the consolidation instances of silt with HEC and HAS soil consolidators, also emphatically discusses the influence regularities of the compressive strength of solidified soil with the following factors: the dose of consolidators and the curing time. Meanwhile, from the point of view of experiment, this paper studies the physical and mechanical properties of solidified soil. Case study shows that HEC and HAS soil consolidators behave as well as cement and lime in road-construction engineering, and even that filling subgrade independently. Also, this paper proposes the appropriate value 6% of HEC and HAS soil consolidators for solidifying silt layer, which can be used as reference for the similar geological conditions.
Study on Updating Design Pattern of Using Solar Energy Hot Water System in High-Rise Residence
Authors: Zhang Jun Jie , Yu Mei Bao , Liu Qiang
Published: November 2012

There are many problems on using solar water heating system in high-rise residence which mainly due to the traditional design method. By means of analyzing the design goal and principles of integration, this paper puts forward a new combinative idea, and meanwhile draws such conclusions as the updating planning design mode, the updating architectural design mode and the updating skin design mode.
Research on Fire Prevention and Evacuation Design of Large Sports Facilities
Authors: Zhang Shao Wei , Song Ling , Li Zhi Min
Published: November 2012

The function of large sports facilities is complex as the space center of people assembling and the comprehensive displaying of city image and vitality, the importance is undoubted for the design of large sports facilities in fire prevention and safe evacuation. This paper puts forward the design process of fire prevention and evacuation and the method for reasonable division of fire partition. According to the special requirements of large space evacuation, the new idea of safety exit borrowing and setting the inner ring road is introduced, the design of building fire protection and smoke control area to open space is studied as the main characteristics of the large sports facilities.
Thinking on Architectural Design of Rural Supermarket
Authors: Hao Li Jun
Published: November 2012

As a new business model, rural supermarket has gone into the lives of rural residents. Going to the supermarket shopping has become a choice of more and more rural residents. It is worth noticing that rural supermarket is not a simple copy and repeat of the urban supermarket. The paper analyzes rural supermarket’s characteristics and inadequacies in current situation, and presents optimal design ideas of rural supermarket considering plane layout, facade selection and external environment design. It is hoped to inspire development of rural supermarket.
Design and Analysis of a Light-Weight Steel Gabled Frames Structure
Authors: Du Wen Feng , Sun Zhi Fei , Zhang Hui , Yu Fu Dong
Published: November 2012

This paper, based on the practical engineering of the steel structure of Henan Shangpin food Co. LTD, introduces the design of a light-weight steel structure with three-span gabled frames, and discusses the solution of the large suspended loads. By taking the steel quantity as the target, the depth calculations and statistical analysis of the reasonable value of the column spacing were carried out. The results show that the large suspended loads should be imposed in the form of live load. When the column spacing is about 8m, the steel quantity is the lowest.
Design and Analysis of a Suspended Lattice Shell
Authors: Du Wen Feng , Yu Fu Dong , Zhou Zhi Yong , Zhu Li Ming
Published: November 2012

The design and analysis of the suspended lattice shell located in Zhejiang province of China is introduced, and some key problems are discussed in this paper. Especially, tensile cable is a key element in large span suspended structures. And the construction of tensile cable is the key technology problem as the tensile force of tensile cable is very sensitive to the construction precision. The tension slacken analysis method is used to obtain the control stress and complete the work with only one time tensile construction. Results of the engineering show that the construction process is simple and the construction scheme is economic.
Research Status and Development Application of Ceramsite Concrete Short Pier Shear Wall
Authors: Hu Bin , Zheng Rong Yue , Zhou Bi Fei
Published: November 2012

Currently our country high-rise construction technology develops forward an important content to reduce the structure dead weight. The ceramsite concrete which makes full use of industry waste material obtains the good social efficiency and helps to reduce the structure dead weight effectively. At the same time, it has the good heat preservation performance as well as the fire protection performance. The short pier shear wall comes by the general shear wall development. It has absorbed irregular cross-section column structure’s merits. It is also easy to satisfy each kind of building plane request. Moreover, it has the lighter weight, saves the material and decreases earthquake function contrast to the general shear wall.
Study on the Property of Ductility of T-Shaped Short-Shear Walls (II)
Authors: Li Zhi Peng , Guo Di , Feng Hua , Liu Jie Yu
Published: November 2012

Based on the experimental study, this paper analyzes the strength and ductility of T-shaped short-shear walls and studies the measures to improve the ductility of specimens by adjusting its sectional reinforcement form. Using finite element software ABAQUS to simulate the elastic and plastic damage process of T-shaped short-shear walls after adjusting the sectional reinforcement, and then to analyze the force characteristic and ductility of the structural elements. The results indicate that under the premise of keeping the total quantities of sectional reinforcement basically constant, the proposed method can effectively improve the ductility of T-shaped short-shear walls while the webs are compressed and the reinforcement form is reasonable.