bluuebunny/crossref_metadata_2025 huggingface dataset:
Seismic Behavior Evaluation of Semi-Rigid Steel Frames with EEP Connections under the near-Fault Earthquakes
Authors: Najdian Miaad , Izadinia Mohsen
Published: June 2012

Pulse shape motions and huge amount of energy applied in short duration by the near fault earthquake, cause brittle fracture in welded connections, which is widely observed in Kobe 1995 and Northridge 1994 earthquakes. Rigid connections, which are generally welded due to lack of ductility, have low energy absorption capability. On the other hand, Semi-rigid connections have a ductile behavior and have a good ability to absorb energy. The purpose of this paper is analysis and compares the behaviors of “rigid” and “EEP semi-rigid” connections in cases of “four bolt extended”, “eight bolt extended stiffened” and “eight bolt, four bolts wide, extended stiffened” under the near fault earthquakes with nonlinear time history analysis by perform 3D software. The results shown that the steel frame with “four bolt extended” semi-rigid connections have appropriate performance compared to the other frames.
Synthesis of PZT Disks by a Hydrothermal Method
Authors: Yang Lin Lin , Wang Yong Gang , Wang Yu Jiang , Wang Xiao Feng
Published: June 2012

The organization of nanostructures across extended length scales is a key challenge in the design of integrated materials with advanced functions. PbZr0.52Ti0.48O3multilayer disks which were constructed by oriented rectangle nanoparticles were easily prepared by a simple surfactant-free hydrothermal process. The as-prepared powders were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The results indicated that the as-prepared PZT disks were constructed by self-assembly of rectangle nanoparticles by a perfect manner. The formation mechanism of the products was discussed.
Engineering Characteristics of Concrete Made of Desert Sand from Maowusu Sandy Land
Authors: Jin Bao Hong , Song Jian Xia , Liu Hai Feng
Published: June 2012

The desert sand from Maowusu sandy land is very fine aggregate. Currently, there are no national specifications concerning the application of desert sand with very fine grain. To apply the desert sand to concrete in civil engineering, concrete specimens made of the desert sand had been tested in order to clarify its engineering characteristics. On the basis of determined chemical composition and physical characteristics of the desert sand, the mechanical properties of concrete made of fine aggregate from Maowusu sandy land were investigated. The results of the tests indicated that the desert sand could be used as a fine aggregate in concrete for general civil engineering. At the same time, the desert sand was used to confect high strength concrete, the strength and workability of which met general engineering requirement, which provided references for high strength concrete preparation in these regions
Experimental Study on the Property of Regenerating Concrete in Different Graduation
Authors: Zhang Xun Zhong , Liu Ping , Jia Bin
Published: June 2012

Through experiments based on three different graduations of regenerating concrete,the paper analyzes the parameters variation characteristics, such as performance of the density, water absorption, moisture content, packing density and crushed indicators.The research shows that Pressure loss of the quality of the regenerating concrete is proportional with loading force. What’s more, it can also reflect the own strength grade of aggregate in a more direct way and should be a new method to assess aggregate strength. Simultaneously, it gives us a relatively superior graduation and provides reference value for guiding actual project.
Pyrolytic Characteristics and Kinetics of Xanthoceras Sorbifolia Oil
Authors: Zhou Quan Cheng , Sheng Gui Hua
Published: June 2012

The pyrolytic characteristics and kinetics of Xanthoceras sorbifolia oil were investigated pyrolysis in indifferent atmosphere and at heating rates of 10, 20 and 30 °C min-1 in an inert atmosphere. The most probable mechanism function and activation energy pre-exponential factors were calculated by the Popescu, FWO and KAS methods. Three stages appeared during pyrolysis: moisture evaporation, primary devolatilization and residual decomposition. Significant differences in the average activation energy, thermal stability, final residuals and reaction rates of the X. sorbifolia oil were observed. Stage II of the X. sorbifolia oil could be described by the Avramic- Erofeev equation 20 (n=4). The average activation energy of X. sorbifolia oil was 353 kJ mol-1
Analysis of Factors Affecting Green Residential Building Costs Based on Fuzzy Factor Analysis Model
Authors: Ruan Lian Fa , Gu Chang Quan
Published: June 2012

Forty-seven influential factors of green residential costs were identified in this study, and then four categories of respondents estimated their influential degrees through a questionnaire survey. In order to analyze these factors more accurately, a fuzzy factor analysis model (FFAM) was proposed while the classical one has often been affected by interference information. After calculating fuzzy eigenvalues, fuzzy correlation cofficients and factor loadings matrix in the model, eight different common factors were extracted. Finally, the author put forward several effective measures for controlling green residential costs based on these common factors.
A Study on the Requirements for Minimum Longitudinal Slope of the Vertical Curve on the Freeway
Authors: You Run Wei
Published: June 2012

The varying laws of the longitudinal grade at the partial any point on the vertical curve in the course of the freeway’s profile design were discussed via the analytical formulas calculation, and the minimum longitudinal gradient and the length of roads which cannot meet the current requirements were found out, then application effect of vertical curves with the large radius was explored. On this condition, some countermeasures and suggestions were provided for the reasonable design of the vertical curves.
Experimental Study of Greenhouse Solar Energy Combined with Coal-Fired Boiler Heating System
Authors: Luo Xiao Lin , Chen Hua Shan , Chen Bing , Fu Hua Chen
Published: June 2012

In order to explore the application methods and development potential of solar energy technology in facility agriculture, and to seek a solution to resolve problems existing in greenhouse production, such as high heating cost and serious environment pollution etc. , an experimental study was carried out on a solar energy combined coal-fired boiler heating system used for greenhouse. In this paper, with Kunming Trifecta Orchid Nursery Co. Ltd of Yunnan Flower Demonstration Garden for experimental research object, the general design and operation method for the system were introduced, and an experiment on operation performance and heating effect of the system was tested in Kunming. The results showed that whether it was sunny or cloudy, the system could make full use of solar energy, make the water temperature of heat preservation tank reach a certain expectation, and ensure the temperature requirements on different growing stages of phalaenopsis in greenhouse. So a theoretical basis is provided for the study on solar energy combined with coal-fired boiler heating system for greenhouse. Through economic analysis of the system, the results showed that this system had high economic value, energy saving and environmental protection performance.
Study on Rebuilding Hengzhou Road Bridge about Reversing the Cross Slope of Bridge Deck
Authors: Ren Sen Zhi , He Guo Jing , Deng Jun Hua
Published: June 2012

As a result of the path route and the width change and in order to connect south of K4 + 726.852 bridge with road in HengZhou avenue smoothly, we need to reverse the cross slope which takes up 2 percent of the bridge deck. We analyze three different reform plans, so as to ensure security of HengZhou bridge. Firstly, we compare the influences for the bridge structure bearing capacity from different projects. Secondly, we study the transformed force performance. Thirdly, we evaluate the bearing capacity. Result shows that transformation surfacing method is costless and easy to operate. The bearing capacity meet the requirements after the transformation. The research achievement has some reference value to other similar bridge for strengthening
Supervision of Self-Anchored Suspension Bridge in Reinforced Concerte
Authors: Du Su Yun
Published: June 2012

The whole length of Beiguan Bridge is 470m. Its main bridge, 40+118+40m long, is a Self-Anchored Reinforced Concrete Suspension Bridge. Taking the spot supervision of Beiguan Bridge for example, this paper mainly describes the experience of supervision for self-anchored reinforced concrete suspension bridge.
Additional Longitudinal Expansion Force between Continuous Welded Rails and Extra-Long Continuous Bridges of High-Speed Railway
Authors: Liu Wen Shuo , Dai Gong Lian
Published: June 2012

In order to investigate the additional expansion force of continuous welded rails (CWR) on extra-long continuous bridges of high-speed railways, the integrative spatial finite element model of track-bridge-pier system is established with the nonlinear spring element simulating the longitudinal resistance between track and bridge. In this paper, the influences of several parameters to the additional expansion force of CWR are studied, including the different resistance models, the number of main spans, the arrangement of adjacent bridges as well as the pier’s longitudinal stiffness. Some conclusions are drawn through comparisons and analysis, which could provide valuable references for design and application of long-span continuous bridges on high-speed railways.
Substructural Damage Identification of Stone Arch Bridge Based on Probabilistic Neural Network
Authors: Guo Feng Qi , Yu Zhi Wu
Published: June 2012

Stone arch bridge was divided into three substructures. They were main arch, vertical wall and vice arch or carriageway board. Probabilistic neural network was applied to substructural damage identification. Static displacement and low-order frequencies were taken as input parameters of the network training. A numerical model was developed to simulate the process of substructural damage identification of stone arch bridge. The effects of noise data to training and recognition were researched. The results show that it is feasible and effective to use probabilistic neural network in substructural damage identification of stone arch bridge.
The Method of Establishing Model for Describing the Structural Constitutive Relationship of Desert Sand under Moving Vehicle
Authors: Lv Wei Wei , Gu Liang , Huang Xue Tao
Published: June 2012

In this paper, the way of setting up the vehicle structural constitutive model is introduceded. With the desert soil three triaxial test data of rock and soil mechanics, the soil structural quantitative parameter ( strain comprehensive structure potential ) is introduced into the soil strength and deformation characteristics analysis.Under the same confining pressure the stress-strain curves of different water content of sand have the same tendency. Through the method of setting up the Duncan-Chang model,structural constitutive model of sand is constructed and the parameters of the model are obtained by testing. The research can provide reference for vehicles and military vehicles to improve crossing through the desert sand.
Computer Simulation of Hot Stamping Process of DP Steel Car Bumper Chain Based on Dynaform
Authors: Liu Han Wu , Liu Zhao Hui , Li Hui Xiao , Ping Shao Bo
Published: June 2012

Owing to the advantages of weight loss and security, duplex steel plate has been the priority for the saloon car body instead of ordinary one among a majority of engine factories. While there are undesirable phenomena because of its high strength at normal temperature, such as its formability is worsened dramatically, and failure and fracture always occur in the stamping. So hot stamping process must be adopted to make the formability available. Based on the Bumper chain of Beijing Hyundai Reina and taken DP600 high strength steel as research object, this paper analyzes the distributions of stress, strain and thickness changes during the process of sheet metal forming by using eta/DYNAFORM software, simulates the spring-back quantity after hot stamping forming, and the numerical simulation of the temperature field distribution with time during stamping process was done. The result shows that duplex steel plate can meet the performance requirements of automotive chain forming, which offers theory basis for the production of such parts.
Calculation and Optimization of Molten Salt for Solar High Temperature Heat Storage
Authors: Yan Qiu Hui , Wang Hong Na
Published: June 2012

The development of energy saving technologies is very actual issue of present day. One of perspective directions in developing these technologies is the thermal energy storage in various industry branches. To meet the requirement of high temperature of solar heat transfer and thermal storage, this paper calculated several sets of data for lots of pure salts and salt mixtures. The results show that, comparing with the ternary carbonate salt (potassium carbonate (0.7) - sodium carbonate (0.1) -potassium chloride (or sodium chloride)), the ternary chloride salt (potassium chloride (0.037) - calcium chloride (0.5) - sodium chloride) is more perspective.
The Transformation of Heavy Metal Be in Activated Sludge Process
Authors: Chen Feng , Zhu Xiu Lian , Yu Wei
Published: June 2012

Municipalsludge is refers to the product of sewage treatment plant, facing the huge number of municipalsludge, the disposal of the municipalsludge has aroused wide attention of all countries. Many studies consider that urban land use of the municipalsludge is the most effective method, However heavy metal accumulats in the sludge and the environment of the risk with agricultural appears day after day.The purpose of this study is: analysis the transfermation of heavy metals in the activated sludge system of various structures. put forward the solution of reducing heavy metal exceeded in the activated sludge treatment process.It appears that the coagulation can make colloid stabilized and sedimentation, can control the input of the heavy metal effectively; Adsorption of activated sludge to heavy metal is very fast, in 30 min basic reached adsorption balance, probably 80% or more;The change from oxygen to aerobic have great influence on Heavy metal biological adsorption;An aerobic digestion processes can reduce the volume and quality of sludge, but there is no enrichment role to heavy metal in sludge.
Principal Factors Preventing China Environmental Risk: Area Angle
Authors: Liu Chang Qing
Published: June 2012

Studies on principal factors preventing CER (China Environmental Risk) from Area Angle are seldom found, so we studied this theme in this thesis. By our analysis, principal factors can be ordered by contribution as follows: Xinjiang, Guangdong, Jiangxi, and Henan. And our related advice is as follows: first, careful protection of natural environment. Secondly strict surveillance on production of waste from enterprise production and human living action, etc.. Thirdly great encouragement to arouse interest in technological innovations friendly with the environment in waste disposal, etc.. And fourthly different emphasis of management in different areas, such as pollution of resources excavation and refinement in Xinjiang, industry pollution and water pollution in Guangdong, food quality and farming pollution in Jiangxi, and food quality, pollution of resources excavation and refinement, and water pollution in Henan, etc..
Quantitative Analysis of Ecological Effects Caused by Master Planning in Hilly Area: A Case Study of Kunming Expo Eco-Town, China
Authors: Wu Song , Duan Chang Qun , Aquino Gerdo P.
Published: June 2012

The environmental conflict throughout land development varies for every landform. In hilly areas, the ecological effects, such as the properties of the land surface and the diversity of flora and fauna cannot be reflected through assessment indexes, which include the building density, green areas ratio, etc. This paper is to provide the impervious index and the corridor index as a complement to the master planners. The indexes is an approach that integrates ecological landscape principles and methods for analyzing the eco-rationality of the master planning using ecological indexes which provides a measure for adjusting development density. An application of the indexes to the residential development of Kunming Expo Eco-town in Yunnan Province, China is provided. The result shows that the indexes can be used to quantify the interrelationship between the development project and the environment and that the required regulatory measures for land development can be implemented via master plans.
Analysis and Thinking of the Current Condition for Traffic Pollution of Urban Roads
Authors: Li Lei Li , Liu Sheng Jun , Xu Han
Published: June 2012

With the rapid development of economy in China, there has been a growth in motor vehicles, deteriorating the traffic pollution of roads year by year. The gas pollution, which mainly comes from complete and incomplete combustion of the fuel, includes CO, SO2, NOx, CO2, and VOC. Al, Ca, Fe and Mg and other non-enriched elements in the atmospheric particle originates from the road dust carried by the motor vehicle at the traffic junctions; the noise pollution emerges from the engine and tire friction. The primary methods applied worldwide covers MOBILE, OSPM and MVMS. For the noise pollution, FHWA and RLS90 are used. The roadside landscaping can absorb emissions, accumulate the heavy metal and reduce the dust and noise, which is an effective way to beautify the environment and prevent the pollution.
Assessment of the Desirability of Tourism Destinations Based on Perceptual Analysis of the Quality of Environment Case Study: The Coastal Areas of Ramsar
Authors: Eshliki Sajad Alipour , Norouzian Ramin
Published: June 2012

Planning for tourism destinations in order to develop collect useful policies with the aim of qualitative improvement of them has a lot of importance.Tourism destinations should have qualities to provide the conditions for attracting the tourists and accommodating them. Different aspects were considered for improving the quality of tourism destinations that one of the most important ones is the quality of tourism environment. This study evaluated the qualitative indicators of the coastal environment of Ramsar city in a field study through questionnaire tool. To this end, 304 questionnaires were distributed among coastal tourists of Ramsar city, and they were analysed after collecting data. The results of the analysis indicated that the qualitative indicators of coastal environment of Ramsar can be recognized in a specified factors. These factors are; 1. Cleanness, the quality of environment sight and social security 2.Tourism facilities 3. Recreational space and activities for families 4.Access and traffic 5.Welfare services and hospitality. There was also significant relationship between quality factors and satisfaction with tourism environment and probability of returning to the tourism destination.
Cars Tracking and Counting at Night
Authors: Chen Yuan Been
Published: June 2012

This work proposes a robust scheme to automatically tracking and counting cars in the traffic surveillance. In the proposed method, pixels at a specific position of successive image frames are first processed by the modified iterative threshold selection technique to establish the background model. Second, an original image is subtracted by this background to obtain a difference image that is performed with the differential image between an original image and its precedent neighboring image to yield an image with initial contour points of moving objects. Third, the robust edge-following scheme manipulates these contour points to produce closed-form objects. Particularly, two headlights of a car are merged with their corresponding reflective lights on the ground to yield two light objects for a car extraction at night. As compared to the conventional methods, the proposed method is demonstrated to have the best accuracy of moving object extraction. Finally, object motion connection is effectively employed to track object paths and compute the number of moving cars. The practical implementation reveals that the proposed method can precisely and reliably estimate a traffic amount.
Quasi-Static Tensile Properties and Damage Mechanism of Three-Dimensional Angle-Interlock Woven Composites
Authors: Luan Kun , Zhang Fa , Wu Li Wei
Published: June 2012

The uniaxial tensile properties of three-dimensional angle-interlock woven composites (3DAWCs) under quasi-static loading were investigated in this paper. The samples were manufactured into dog-bone shape and tested on Material Test System 810.23. The strain-stress curves in warp direction indicating the Young’s moduli, maximum stress and maximum strain are achieved from the uniaxial tensile test. The effects of microstructure and damage morphology of 3DAWC under quasi-static tension are discussed. Furthermore, we will focus on the energy absorption mechanism from the view of tensile failure mode. The material parameters of 3DAWC in warp direction can be evaluated for developing quantitative approach to design polymer matrix composite structures.
Application of Double Constant Current Source Design in Single-Port Gasless Laparoscopic Surgical Instrument
Authors: Xiang Bo , Sun Jun , Zhou Ping , Wang Xiu Ying
Published: June 2012

Single-port gasless laparoscopic surgical instrument (SPGLSI) is a national patented product in minimally invasive surgery filed. The key problems of it are that the luminophor is short of use-life and the illumination of it is often not enough when lighted by the shadowless cold light. In this paper, we first take qualitative and quantitative analysis of the luminophor designed by the conventional method. Then, a novel design method that use double constant current source (DCCS) to light the SPGLSI is proposed. Several tests have shown a much better lighting effeteness for the luminophor has been achieved using the proposed design method.
Nonlinear Analysis of Two Shear Walls Using Elastic Plastic Damage Model
Authors: Lin Lin , Li Cheng He , Qi Hu
Published: June 2012

In this paper, the elastic plastic damage model for concrete under static loading previously proposed by Hu Qi et al. is developed in ABAQUS via UMAT, and it is verified by the simulation of two shear wall members under horizontal loading. The simulation results indicate that this constitutive model can accurately predict typical nonlinear performances of reinforcement concrete shear walls. Using the proposed model one can get the damage distribution of reinforced concrete members which is helpful for researchers to get the failure pattern of structures.
Studies on Galloping of Iced Conductor Based on Tower-Line Coupling System – Aerodynamic Loads
Authors: Hu Hao Jun , Wang Yuan Han , Hu Zi Dong
Published: June 2012

Based on the second development at the ANSYS computing platform, finite element model of a Tower-Line Coupling system was established. The computational fluid dynamics module (CFX) was used for the numerical simulation of the aerodynamic characteristics of iced conductor. On the basis of the Kaimal spectrum, fast Fourier transform was introduced to prepare the wind speed simulation program WVFS with spatial correlation into consideration, thus generating aerodynamic coefficients of iced conductor at different wind attack angles as well as wind speed time series at tower-line nodes. According to the finite element model of continuous multi-conductors and the aerodynamic force- wind attack angle curve, the explicit integration is applied for numerical solution of galloping of iced conductor.
High Temperature Tensile Properties of Mg-5Li-3Al-1.5Zn-2RE Alloys
Authors: Li Ting Qu , Gao M. , Wang S.H. , Cao Zhan Yi
Published: June 2012

In this paper, the high temperature tensile properties of the LAZ532-2RE alloy prepared by hot extruded processing after vacuum casting was investaged. The tensile properties of the extruded LAZ532-2RE alloy specimens were tested at different temperature with different strain rate. The microstructures near the fractured surfaces were observed using microscope in order to investigate the dominant deformation mechanism. The activation energy was calculated to explain the high temperature deformation mechanism. The result indicated that the strength of LAZ532-2RE alloy was high at the temperature range from 398K to 423K. Meanwhile, the fracture elongation of the alloy reaches 121% at 523K under strain rate 1×10-3s-1.
Comparison of Two Texture Retrieval Algorithms
Authors: Chen Xin Wu , Shen Yi Xian , Ma Shi Xin
Published: June 2012

Contourlet transform and wavelet have been widely used in image processing systems including texture image retrieval applications, and many literatures have reported how to construct the retrieval systems. Among them, generalize Gaussian distribution (GGD) model is a promising one. We will compare the algorithm with another one, which uses energy and standard deviation features and Canberra distance. Experimental results on 40 texture images from MIT vision database show that the latter one has higher retrieval rates for wavelet and contourlet transform retrieval systems, which indicate that the GGD model is not accurate for charactering texture feature.
Effect of Co Addition on the Glass-Forming Ability and Mechanical Properties of Ti-Zr-Be-Cu-Co Bulk Amorphous Alloys
Authors: Suo Zhong Yuan , Song Yan Ling , Qiu Ke Qiang
Published: June 2012

The effect of Co substitution for Be on the glass-forming ability and mechanical properties was investigated in Ti35Zr30Be27.5-xCu7.5Cox (x=0, 3.5, 7.5, 11.5 at.%) alloys by using X-ray diffractometry (XRD), differential scanning calorimetry (DSC), high-resolution transmission electron microscopy (HRTEM) and compression test. With the substitution of Co for Be, glass-forming ability (GFA) is significantly enhanced and fully amorphous rods with a diameter of up to 12 mm were produced in the alloy with 3.5 and 7.5 at.% Co. The Ti35Zr30Be24Cu7.5Co3.5 bulk glassy alloy exhibits good plasticity of 4% during compressive applied load at ambient temperature in conjunction with distinct yield strain of 2% and high fracture strength of 2196 MPa. The effect of the addition of Co on the structure and deformation behavior of the Ti35Zr30Be27.5-xCu7.5Cox (x=0, 3.5, 7.5, 11.5 at.%) alloys is discussed.
A Maintenance Strategy of Materialized Views in Distributed Environment
Authors: Qu Zhi Cheng , Guo Tao Lin
Published: June 2012

Database provides users with various applications via materialized views. The trouble of the update of materialized views is that there are many changing data sources, and in turn, it is difficult to maintain the consistency of materialized views and data sources. This method, a algorithm to change the execution order of things to be updated in materialized views appropriately, is based on maintaining the consistency of materialized views and data sources in distributed environment using the time stamp method, which reduce the maintenance costs of materialized views theoretically.
Cast - In Situ Concrete Hollow Plates, the Application of the Teaching Building
Authors: Hu Gao Qian , Hu Shuang Xi
Published: June 2012

The design and construction characteristics of cast-in-situ concrete hollow floor are introduced and the difficulties of the construction system are discussed in this paper. Based on the analysis of the engineering, the construction technology is introduced and its application is evaluated.
The Research of the C-Doped TiO2 Films Deposited by Arc Ion Plating
Authors: Zhang Shu Juan , Li Ming Sheng , Chen Zhi Qin , Fan Yong Zhong
Published: June 2012

The uniform and transparent C-doped TiO2thin films were successfully deposited on medical glass slide by arc ion plating. The influences of the C-doped quantity, pulsed negative bias and annealing treatment on films properties were investigated. Film structure, surface morphologies and optical properties were measured with XRD, SEM and UV-VIS transmittance spectroscope. Photo-catalytic performance of the films was evaluated by degrading methyl orange. The results show that the C-doped quantity and annealing treatment have important influence on the absorption edges. The effect of annealing treatment is similar to that of the increasing the C-doped quantity, and they can enhance the C doping and extends the absorption edge. The absorption edges of the films increase with the rising of the C-doped quantity, and all the films absorption edges increase after annealing at 400°Cfor 4h, and the best extending can increase 20nm after annealing. Along with the negative bias increasing, the intensity of rutile diffraction peak increases, but the anatase decreases. The micro-morphology and crystal structure of different C-doped quantity are mutually correspond. The roughness and grain size of TiO2films surface decreases significantly with the negative bias increasing. The crystal grains become even and fine, the high bias films surface micro-morphology has rice-like granular shape.
The Standard Parameters Research in Digital Printing by G7 Technology
Authors: Li Kai , Sun Hong Guang , Jiang Wen Yan
Published: June 2012

In this paper, a kind of new G7 digital printing plate is designed by CorelDraw12 software, and all the experiments are carried out on Founder Yinjie C5100 digital press. Select values of density, dot increase values and CIEL*a*b* values to plot the neutral print density curves and dot increase curves with matlab software. Calibrate the G7 standard parameters in process of quality control. Build ICC profiles and printing color gamut respectively after attaining neutral gray balance. The research shows that G7 technology can improve the printing quality efficiently, and the paper offers a realistically applying for the operation.
The Influence of Paper Factors on Digital Printing Quality
Authors: Jing Wei Feng , Jiang Wen Yan
Published: June 2012

Digital printing has been playing a more and more important role in printing industry for its convenient production and quick turnaround. By experimental method, the differences of digital prints with different paper were detail analyzed, includes different base weight papers of the same category, and different categories papers with the same base weight. Results showed that the printing quality of offset paper with 120 g/m2base weight was better than that of 100 g/m2, and that printing quality of art paper was better than matt art paper with the same base weight. Other characteristics of different papers were investigated too. The method and conclusion provides in this paper would be helpful for choosing appropriate material for production activities.
A Robust SRAM Design for Ultra Dynamic Voltage Scalable VLSI System
Authors: Yang Jun , Bai Na , Wu Wei Qi , Shan Wei Wei , Cai Zhi Kuang
Published: June 2012

In this paper, a SRAM array targeting IBM 130nm CMOS technology is proposed for ultra dynamic voltage scaling (UDVS) application with better immunity against process variation. A type of modified Schmitt Trigger inverter is adopted in the SRAM design, which guarantee stable operations in both superthreshold and subthreshold supply voltage regions. Testing results demonstrate that the proposed SRAM array functions well in the supply voltage range of 150 mV to 1200 mV. The optimum-energy supply voltage point is about 400 mV for proposed UDVS SRAM array. And the energy at 400 mV decreases by 62.5% compared to that at 1200 mV.
Optimum Digital Filter for High-Performance All-Digital Phase-Locked Loop
Authors: Sun Hua Fang , Liu Xin Ning , Chen Xin
Published: June 2012

The effect of all-digital phase-locked loop (ADPLL) digital filter parameters on the jitter is investigated in time domain, and a systematic design procedure for ADPLL is presented. The pro-posed method not only estimates the output jitter of an ADPLL, but also finds the optimal filter pa-rameter minimizing the overall ADPLL timing jitter. To verify the theoretic analysis, an ADPLL behavior model in matlab is designed. The simulation shows significant performance improvement on the timing jitter.
An Improved Leaf Area Measurement Based on Image Processing
Authors: Han Dian Yuan
Published: June 2012

This paper concerns the plant leaf area measurement based on improved image processing. Firstly, the referenced rectangle was detected with 2-side scanning method. Then the leaf region was segmented according to 2G-R-B of every pixel with two different thresholds, and by using of dilatation operation, the trimap of leaf image was got. Next the pixels in unknown area were classified to the foreground or background area with improved knockout method and the exact leaf was segmented. Lastly, the leaf area was calculated according to the pixels proportion between leaf region and the referenced rectangle. Experiment results show this method has good accuracy and rapid speed.
Establishment and Analysis of Fault Model for the Central Air-Conditioning System
Authors: Li Lian You , Shi Yong Jiang , Li Dan
Published: June 2012

This paper analyzes the dynamic fault information (temperature, pressure, flow, noise, vibration etc.) in the process of operation of the air-conditioning system and establishes the simplified qualitative physical model which takes the surface air cooler as an example, and then writes out the mathematical model according to the simplified model. Finally, the paper gets some conclusions or conjecture suitable for the material object according to the research of the mathematical model.
Study on the Three-Graded Random Aggregate Model of Concrete Beam with Initial Imperfection
Authors: Qin Yuan , Chai Jun Rui , Dang Fa Ning
Published: June 2012

In this paper, the three-graded random aggregate model of concrete beam is established by using the Monte Carlo method. And in order to close to the engineering practice, the initial imperfection is putted in to this model. Then the impact load is applied to the beam, and the numerical calculation is carried out, the results of numerical simulation and experiments of previous are compared. It is found that the damage process of concrete and calculation results are similar to the experimental results of previous. Thus proof that the model is suitable to the engineering practice.
System Design of Campus Remote Video Monitoring
Authors: Zhang Xiao Ming , Wang Jun Qi
Published: June 2012

With the rapid development and the universal application of computer network communication technology, image compression processing technology and transmission technology, Developing steps of intelligent, network, information and digital about university becomes faster and faster. It is very important for university safety work to construct a intelligent network video monitoring system. A full function system based on H.264 standard and character of security-monitoring work is designed. real-time monitoring and dynamic video are realized for key region of campus in this system, at the same time remote monitoring is realized by means of monitoring platform established by internet.
Blood Circulation Network Incorporation an Artificial Bone for Real Time Operation
Authors: Tasakorn M. , Suwanpayak N. , Yupapin P. Preecha
Published: June 2012

We propose the use of molecular buffers and networks for blood circulation in Haversian and Volkmanns canals to deliver the nutrient, drug and other essential substances in the regeneration process of bone and soft tissue. By using the dynamic optical tweezers generated within a PANDA ring resonator, the required molecules can be trapped and transported within the designed neural networks, in which the required substances can perform within the required region before reaching the required destinations. The advantage of the proposed system is that system, which can perform within the tiny system (thin film device). The system can be used to enhance the medical treatments, which can reduce the period of convalescence, i.e. operation, which means the in situ surgery can be realized. Furthermore, the transportation of the trapped molecule by light in the networks is described, the theoretical background is reviewed.
Determination the Effect of Silver Nanoparticles on Gram-Positive Bacterial Cells by Atomic Force Microscopy
Authors: Ketchart O. , Treetong A. , Na-Ubon P. , Supaka N.
Published: June 2012

The atomic force microscope (AFM) was employed to study the significant effects of silver (Ag) nanoparticles-treated on the elastic cell wall of bacteria. In this study, the exposed Staphylococcus aureus was grown at 37 °C for 14 h. The cultures were centrifuged and cell pellets were resuspended in Milli-Q water to prepare final bacterial suspensions. A drop of bacterial suspension was deposited on polydimethylsiloxane (PDMS) sheet and allowed to air dry at room temperature before imaging. The cell suspension was collected at certain time intervals from the beginning of the test. The morphology of the cell surface compares between without treatment and Ag-treated cell suspension was investigated. The force mappings were obtained for the PDMS substrate and for the bacteria while scanning obliquely. The contribution of the internal osmotic pressure, to obtain a quantitative measure for the elasticity of the cell wall, had to be estimated. The pyramid-shaped AFM tip indented into a soft cell and the resulting bacterial surface was flat, and irreversible changed of bacterial cell structure. The investigation is attempted to understand pronounced effect of Ag nanoparticles on the individual gram-positive bacterial cell after treated with Ag nanoparticles.
Effect of Crystalline Morphology on Mechanical Properties of PPB Polymer Nanofiber Composite
Authors: Sangthaiyarak S. , Tawichai N. , Pengpat Kamonpan , Rujijanagul Gobwute , Tunkasiri Tawee , Eitssayeam Sukum
Published: June 2012

In this work, the effects of crystalline morphology on the mechanical properties of polycaprolactone/polyvinyl alcohol/ butterfly pea extract (PPB) nanofiber composite were investigated. Biopolymer nanofiber composite of PPB was fabricated by electrospinning technique using polycaprolactone concentration and distance of nozzle to ground collector of 7 wt% and 20 cm, respectively. The influence of applied voltage (vary from 15-25 kV) on the stress-strain curves was also observed. The structure and morphology of electrospun PPB nanofibers were investigated by x-ray diffraction (XRD) and scanning electron microscopy (SEM). It was found that, the degree of crystallinity increased with applied voltage and the mechanical properties was affected by the morphology of PPB nanofiber.
Pectin-Based Nano-Sized Emulsions Prepared by High-Pressure Homogenization
Authors: Burapapadh K. , Takeuchi H. , Sriamornsak Pornsak
Published: June 2012

Pectin-based nanoemulsions loaded with itraconazole were prepared using high-pressure homogenizer comparing to sonicator. The high-pressure homogenization provided the smaller size of emulsions when homogenizing time was increased. Using the homogenizing pressure of 100 MPa for 90 minutes could provide nanosized emulsions. Sonication method could reduce the emulsion size, however, the size was limited to approximately 2 µm. The type of pectin also influenced the emulsion size. Using high methoxyl pectin (HMP) provided the smallest emulsion, compared to low methoxyl pectin (LMP) and amidated low methoxyl pectin (ALMP). This may be due to the high portion of hydrophobic moieties of HMP which provides better emulsifying properties. From these results, the high-pressure homogenization could produce the nanosized emulsions. Pectin type significantly influenced the emulsion properties. Therefore, the use of high-pressure homogenization method with the proper emulsifiers could provide the nanosized emulsions.
Study of Mechanical Properties of Magnesium Oxide Doped Alumina (Al2O3) and Yttria Stabilized Zirconia (YSZ) Composite for Medical Applications
Authors: Phothawan A. , Nganvongpanit K. , Tunkasiri T. , Eitssayeam Sukum
Published: June 2012

The aim of this research is to study the mechanical properties such as hardness ,wear resistance etc , of the magnesium oxide (MgO) doped alumina (Al2O3) and yttria stabilized zirconia (YSZ) composite, We first prepared MgO-doped Al2O3(denoted as Al4) by mixing Al2O3powder and 0.4 wt% of MgO powder. After that Al4powder was mixed YSZ powder, with the formula [(x)Al4- (100-x)YS when x was varied from 0 - 100 by wt%. The samples were sintered at 1450, 1500, 1550, 1600 and 1650 °C. In addition, microstructure of the surface was studied employing both optical and scanning electron microscopes. The hardness of the surface was investigated by Vickers indentation technique and pin on disk apparatus was employed for wear rate measurement. The results showed that the density and volume shrinkage decreased with the increase of Al4content. The grain size and porosity of the specimens tend to decrease when the sintering temperature increases. The hardness and wear resistance of the samples increased with the increase of Al4up to 90 %. It was also found that the material is not toxic to the body.
Surface Degradation and Mechanical Properties of PVC/Wood-Pallet Composite under UV-Weathering Environment
Authors: Sreenual B. , Atong Duangduen , Pechyen Chiravoot
Published: June 2012

This research studied the effects of 4 types of additives, , wood powder, UV-absorber, impact modifier and pigment, on UV-stability of PVC/Wood-Pallet prepared by extrusion process. The amount of additive used was varied from 0 35 %w/w. The central composite design (CDD) was employed to experimentally design the formulation of PVC/Wood-Pallet, in order to practically reduce the total number of experiments from 625 pipes (Full factorial design for 4 factors and 5 levels) to 30 pipes without losing the credibility of the results achieved. The photodegradation of the PVC/Wood-Pallet was performed by an outdoor exposure test. The progress of photodegradation was followed by determining the changes in mechanical properties, physical properties and appearance, and thermal properties as a function of exposure time. The results showed that the PVC/Wood-Pallet No.30 had better mechanical properties than the others over period of exposure time. In addition, it was found that UV exposure could actually improve short-term mechanical properties due to postcuring phenomenon.
Experimental Study on the Oxygen-Enriched Co-Combustion of Sewage Sludge and Coal in CFB
Authors: Liu Han Zhou , Lu Xiao Feng
Published: June 2012

Oxygen-enriched combustion technology is one of the new clean coal combustion technologies that can control pollutant emission. An oxygen-enriched combustion experiment of coal and sewage sludge in a Circulating fluidized bed (CFB) incinerator was carried out. Experimental analysis on the combustion characteristics of fuels with different mass rate in the oxygen concentration of 21%~35% was done. The results showed that the combustion characteristics differ from the different mixing ratio of coal to sludge in different oxygen atmosphere. When the amount of the fuel was constant, as the increase of the oxygen concentration in the air, the furnace temperature increased gradually, the SO2 concentration and NO concentration showed increasing trend, the CO concentration and HCl concentration showed decreasing trend.
Method for Pre-Estimating Dynamically the Optimum of Extremum Value Control System Based on Least Squares
Authors: Li Guo Qiang , Liu Yong Qin , Liu Wen Jiang
Published: June 2012

As the optimum of extremum value control system drifts faster it may make bigger error for pre-estimating statically the optimum, it is particularly remarkable if the transfer function of the linear part is with a high order dynamic element. In this paper, a method based on LS(least squares) is presented to pre-estimate dynamically the optimum of extremum value control system. The linear part of controlled plant could be approximated by a cascade of 1st order dynamic element and a pure time delay element as the controlled model is simplified it is successfully resolved for pre-estimating dynamically the optimum of extremum value control system with a high order element by LS.
Volume Measurement of Large Material Stack Based on the RBFNN Interpolation
Authors: Chen Chun , Yang Wei Min , Zhang Peng Xin
Published: June 2012

This paper presents a quantitative method of measuring the volume of material stack.The material stack is divided into many little rectangular columns,then the material stacks volume will be got by calculating each rectangular columns volume.At the same time,a measurement system is designed to achieve the automatic measurement, three-dimensional reconstruction, and volume measurement.
Aging of the Gasket Materials in Simulated PEM Environment and Accelerated Mediums
Authors: Li Guo , Tan Jin Zhu , Gong Jian Ming
Published: June 2012

Silicon rubber is a potential material for gaskets in proton exchange membrane (PEM) fuel cell. So its long term stability and durability is crucial to the electrochemical performance of fuel cell especially in an acidic, high temperature, humid environment. In present paper, the aging process of silicon rubbers has been studied in one simulated PEM fuel cell medium and two accelerated durability test (ADT) mediums for short time test at 70oC and 90oC, respectively. Effect of exposure time, temperature and exposure medium on aging of silicone rubber is also compared. Weight loss is measured by electronic balance; topographical changes on samples’ surfaces are monitored by optical microscopy; Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy was employed to study the surface chemistry of samples before and after exposure over time. The results show that the weight loss increased over time. Surface conditions of samples change over time from initially smooth to rough, crack appearance and finally crack propagation through Optical microscopy. ATR-FTIR results show that the surface chemistry changed significantly via de-crosslinking and chain scission in the backbone for materials over time. The aging degree is severe at high temperature or in high concentration acidic solution over time.
The Structure and Photoluminescence Properties of Ca3Si2O7: Eu2+ Phosphor
Authors: Zhang Xing Hua , Lu Zun Ming , Meng Fan Bin , Hu Long , Xu Xue Wen , Lin Jing , Tang Cheng Chun
Published: June 2012

A series of yellow-emitting phosphors based on a silicate host matrix, Ca3-xSi2O7: xEu2+, were prepared by solid-state reaction method. The structure and photoluminescent properties of the phosphors were investigated. The XRD results show that the Eu2+ substitution of Ca2+ does not change the structure of Ca3Si2O7 host. The SEM images display that phosphors aggregate obviously and the shape of the phosphor particle is irregular. The EDX results reveal that the phosphors consist of Ca, Si, O, and Eu elements. The Ca3-xSi2O7: xEu2+ phosphors can be excited at wavelength of 300-490 nm, which is suitable for the emission band of near ultraviolet or blue light-emitting-diode (LED) chips. The phosphors exhibit a broad emission region from 520 to 650 nm and the emission peak centered at 568 nm. The phosphor for has the strongest excitation and emission intensity, and the energy transfer style between Eu2+ ions is quadrupole-quadrupole interaction for higher concentration Eu2+ doped Ca3Si2O7 phosphor. The Ca3-xSi2O7: xEu2+ phosphors can be used as candidates for white LEDs.