bluuebunny/crossref_metadata_2025 huggingface dataset:
A Strain-Rate Gradient Theory of Plasticity and its Comparison with Strain Gradient Theories
Authors: Alexandrov Sergei , Lyamina Elena , Jeng Yeau Ren
Published: March 2013

Gradient theories of plasticity play an important role in the description of inelastic behavior of materials. Usually, these theories involve space derivatives of stress or strain. On the other hand, conventional theories of plasticity can be divided into two groups, flow and deformation theories. Each of these groups has its own area of applications. The main conceptual difference between the theories belonging to the different groups is that the primary kinematics variables in deformation theories are displacements (or strains) whereas in flow theories velocities (or strain rates). Therefore, it is of interest to propose a gradient theory of plasticity involving space derivatives of a measure of strain rate (strain-rate gradient theory of plasticity) and to compare qualitative behavior of solutions for the strain-rate gradient theory of plasticity and an existing strain gradient theory of plasticity. One possible strain-rate gradient theory of plasticity is proposed in the present paper. The equivalent strain rate (second invariant of the strain rate tensor) is used as a measure of strain rate. The Laplacian operator is adopted to introduce the gradient term. An analytic solution for expansion of a hollow sphere is given for two strain-rate gradient theories of plasticity and one strain gradient theory. Comparison of the solutions shows that some qualitative features of the solutions for the strain-rate gradient theories are in better agreement with general physical expectations than those for the strain gradient theory.
Mathematical Modeling and Analysis of Vibration Characteristics of Smart-Phone
Authors: Yoon Suk Min , Kim Jae Hee , Kim Jin Ho
Published: March 2013

Slimming of a smart phone is one of the key technologies in the current smart-phone industry. Because the vibration actuator is the thickest part of a smart phone, a slim linear vibration actuator has been developed. For the analysis of the vibration characteristic of a smart phone, experiment has been used one of the most popular techniques, but it consumes a lot of cost and time. Accordingly, as an alternative to experiments, mathematical modeling and analysis can be applied. In this paper, a mathematical modeling is created for analysis of the vibration characteristics of a smart-phone applied with a horizontally vibrating linear actuator. In addition, the result of the mathematical analysis is compared with that of the experiment for verification.
Mathematical Modeling of Ball-End Cutter
Authors: Hsieh Jung Fa , Wang Fu Shou
Published: March 2013

The ball-end cutter plays an important role in machining free-form surfaces due to its adaptability to a surface. It is widely used in aerospace, automobile, and die/mode industries. Thus, the demand for higher cutting performance and lower cost of the ball-end cutter has been increasingly focused. In this paper, based on normal helix cutting edge geometric model, the cone wheel, which was used to grind the rake and flank face of ball-end cutter, was designed. Then, we use homogenous coordinate transformation to derive for the ball-end cutter and establish the mathematical model for grinding this type cutter in terms of grinding parameters. Finally, the cutting angles of ball-end cutter were discussed.
MHD Couette Flow in Cylindrical Porous Annulus with Perfectly Conducting Walls
Authors: Guo Sian Wun , Leong Jik Chang
Published: March 2013

This work obtained an analytical solution for a steady cylindrical MHD Couette flow in a porous medium between two perfectly conducting rotating cylinders under the influence of a non-uniform radial magnetic field. Since part of the analytical solution is expressed in terms of the integral of the Modified Bessel function of the first and second kinds of variable order, numerical integration was performed. Current results indicate that the flow may become more uniform when the strength of the external magnetic field is increased. The magnetic fluid tends to slow down if the permeability of the porous medium decreases. If the porous annulus is thick, the momentum of the flow is more difficult to propagate from the outer cylinder into the inner part of the annulus. If both the inner and outer cylinders rotate, the shear effect the inner cylinder imposes is only relatively influential in the region close to it. A decrease in Da no less than 10-2 may increase the amount of magnetic field induced. The transfer of momentum across the annular space is easier in a thin porous annulus than a thick one and hence induces a stronger magnetic field. If the inner cylinder rotates in the direction opposite of the outer one, the magnetic field in the clockwise direction will be induced in some region.
Modeling and Simulation Study of a Series Hydraulic Hybrid Vehicle
Authors: Chen Chih Keng , Vu Tri Vien , Hung Chih Wei , Lin Chih Jer
Published: March 2013

As a branch of the Hydraulic Hybrid Vehicle (HHV) technology, Series Hydraulic Hybrid Vehicle (SHHV) has been an important research object of institutions and automotive manufacturers all over the world. With the flexibility of engine management and regenerative braking characteristics SHHV is expected to be a short-term solution to develop a higher efficiency, cleaner, and safer transportation. In this work, the function and parameter determination of key components for SHHV are discussed. Based on the analytical analysis, the suitable set of component parameters is selected. The model of SHHV is implemented via Simulink/MATLAB mostly based on SimScape toolbox. The proposed model can be used as a development tool to quickly simulate the real hybrid system when it allows applying different parameter sets and in various conditions. The performance of the system is evaluated through some specific cases and the capability of braking energy recovery of the system is also investigated. Simulation results indicate that for a 2.5 ton truck case, more than 86% of braking energy can be captured and more than 72% of that energy can be returned to the kinetic energy of vehicle motion.
Numerical Study of the Influence of Refractory Thickening on the Reacting Flow and DeNOx Effect in a CO Boiler
Authors: Yeh Chun Lang
Published: March 2013

Performance of a CO boiler has a detrimental influence on the operation and production of related industries. In a previous study, we have presented a numerical study of the influence of refractory thickening on the heat transfer and fluid flow in a CO boiler. In this paper, the influence of refractory thickening on the reacting flow and DeNOx effect in a CO boiler is discussed. It is found that refractory thickening can reduce the temperature and the skin friction in the DeNOx section. Furthermore, NOx formation in the DeNOx section is also alleviated by refractory thickening.
Performance Enhancement of a Small Centrifugal Cooling Fan
Authors: Lin Sheam Chyun , Chang Cheng Ju , Hsieh Ming Yuan
Published: March 2013

Under the rapid enhancement of CPU performance, the thermal management on the CPU becomes a challenging task, especially for the industrial PC with a high system resistance. The traditional axial fan with heat sink assembly is not capable to solve this difficult thermal-dissipation problem. Thus, a combination of centrifugal fan and heat sink is utilized to solve this high system-resistance for a server. A centrifugal fan is utilized to offer extra static pressure for drawing the hot air inside this compact enclosure and discharging to the atmosphere. In this study, experimental measurement and numerical simulation are integrated to improve the aerodynamic performance of a blower (80x 80x15 mm3) by redesigning its housing and rotor. Also, fan performance and acoustic experiment are conducted in an AMCA 210-99 test chamber and a semi-anechoic chamber following CNS-8753 code for ensuring a reliable test platform. In conclusion, based on experimental and CFD outcomes, the maximum flow rate and the static pressure of the improved design alternative are successfully increased by 19.5% and 25.53%, respectively.
Polymerase Chain Reaction Microfluidic Devices with Integrated Water Cooling Channel
Authors: Chen Jyh Jian , Shen Chia Ming , Chen Sin Jhih
Published: March 2013

A novel continuous-flow polymerase chain reaction (PCR) chip has been analyzed in our work. It operates by cycling a prepared sample within three temperature zones. Two temperature zones are controlled by two external PID controllers. And the other is controlled by the flow rate of the fluid inside a water channel under the glass chip. The commercial software is utilized to determine the chip materials that are responsible for creating the denaturation, annealing and extension temperature zones within the chip. Therefore we utilize this PCR chip to perform PCR experiment. And DNA templates provided with the yT&A® cloning vector are amplified successfully.
Predictions of Maximum Forging Load and Effective Stress for Strain-Hardening Material of near Net-Shape Helical Gear Forging
Authors: Yang Tung Sheng , Yang Tsung Hsien
Published: March 2013

In this paper, the use of the finite element method in conjunction with abductive network is presented to predict the maximum forging force and effective stress for strain-hardening material during near net-shape helical forging. The maximum forging load and effective stress are influenced by the material properties such as yielding stress, strength coefficient and strain hardening exponent. A finite element method is used to investigate the clamping-type forging of helical gear. In order to verify the prediction of FEM simulation for forging load, the experimental data are compared with the results of current simulation. A finite element analysis is also utilized to investigate the material properties on forging load and maximum effective stress. Additionally, the abductive network was applied to synthesize the data sets obtained from the numerical simulation. The prediction models are then established for the maximum forging load and maximum effective stress of near net-shape helical gear forging under a suitable range of material parameters.
Reliability Test of a Rule-Based SCR Control Strategy for Cleaner Heavy-Duty Diesel Engine using Biodiesel Blend
Authors: Chou Chih Cheng , Chiang Chia Jui , Ku Yong Yuan , Chen Chih Chieh
Published: March 2013

A rule-based SCR control strategy is developed for a 5% biodiesel fueled heavy-diesel engine. The control objective is to reduce the tail-pipe NOx emission while minimizing the urea dosage in a reliable fashion. A total of 32 runs of experimental test in ESC and ETC driving modes are conducted to demonstrate the performance and reliability of the rule-based control strategy. Average NOx reduction rates of 78.5% and 60% are achieved for the ESC and ETC tests respectively. In the mean time, the average urea dosage is 160 gram for the ESC tests and 0.49 % of the fuel consumption for the ETC tests. Variation of less than 7.78% and 12.05% for the ESC and ETC tests respectively demonstrate the reliability of the rule-based control strategy.
Reliable Method of a Non-Insulated Double-Pipe Heat Exchanger
Authors: Wong King Leung , Chen Wen Lih , Po Li Wen
Published: March 2013

Log mean temperature difference (LMTD) method neglecting the influence of heat radiation is conventionally used to calculate the total heat transfer rate of heat exchangers. From recent investigation of a single-pipe heat exchanger in some practical situations, it is found that the total heat transfer rate error of single-pipe heat exchanger obtained by LMTD method is up to 40% in the situation of oxidized metal heat exchanger with higher surface emissivity located in ambient air with low heat convection coefficient. A log mean heat transfer rate (LMHTR) method considering heat radiation has been developed to calculate the total heat transfer rate of a single-pipe heat exchanger and more accurate results can be achieved. It is also found in the present investigation that LMTD method is also not suitable to apply to non-insulated double-pipe heat exchangers and a more accurate LMHTR method considering heat radiation is developed to obtain the more reasonable results.
Residual Stress and Bead Profile Analysis of Pulsed Nd:YAG Laser Lap Welding
Authors: Hung Tsung Pin , Hsu Chao Ming , Lin Ah Der , Kuang Jao Hwa
Published: March 2013

The weld bead temperature distribution and shape during pulsed Nd:YAG laser lap welding are studied. A volumetric heat source model is derived to include the surface flux and the keyhole heat transfer effects in the pulsed laser lap welding process. The proposed pulsed laser heat transfer mode is employed in a simulation with the commercial finite element software Marc. The numerically computed results of the weld pool dimensions are compared with the experimental results. The comparison shows a good agreement between the simulated and measurement results, indicating that the proposed model is feasible. The results reveal that the pulse duration and spot pitch have considerable influence on the temperature field distribution and the residual stress distribution.
Simulation and Control for Load Change Process on a Solid Oxide Fuel Cell
Authors: Yu Dung Di , Chiang Mao Hsiung
Published: March 2013

This paper addresses the dynamic characteristics of SOFC with an emphasis on control strategy development for optimized temperature control during load change. A methodology on regulating fuel utilization (Uf) and air excess ratio (λ) is investigated to validate alleviation of temperature fluctuation. An integrated dynamic model of SOFC, composed of mass balance, temperature balance, and electrochemistry, collaborates with Model Predictive Controller (MPC) in MATLAB/Simulink to verify the dynamic characteristic during load change process in the paper. A variable λ strategy is proposed and compared with traditional fixed λ strategy. Simulation results show the variable λ strategy can reduce the temperature variation for a safe operation, in comparison with that by the fixed λ strategy.
Effect of Strain Rates on the Mechanical Behavior of Cu Thin Films of Various Thicknesses
Authors: Chung Kuan Jung , Lin Chi Feng , Chiang W. C.
Published: March 2013

The objective of this study is to investigate the mechanical behavior of copper thin film with different thicknesses subjected to varying strain rates. A micro-force tensile testing machine (MTS Tytron 250) was used to test the polyimide samples coated with different thicknesses of copper (500 nm, 750 nm, 1000 nm, and 1500 nm). The experiments were conducted by applying test vehicles to different strain rates (1.6×10-4 s-1, 1.6×10-3 s-1, and 1.6×10-2 s-1). The experimental results showed the strain rate and the thickness have obvious influence upon the mechanical properties of Cu thin film. The yield stress increases as increasing the strain rate or decreasing the thickness of Cu film. For considering the strain rate sensitivity m, the strain rate sensitivity m is found that it increases as decreasing the thickness to imply that Cu film has high strain-rate response at low thickness.
The Kinematic Design of Three-Speed Automatic Transmission for Electric Motorcycle
Authors: Hsieh Long Chang , Tang Hsiu Chen
Published: March 2013

Motorcycle is invented so far more than 100 years. Because of having the advantages of light weight, cheap and fast-moving, motorcycle becomes the most popular traffic vehicle. Traditionally, the power systems of motorcycles are internal combustion engines. Recently, due to the reason of energy-saving, and carbon reduction, the engine in motorcycle is substituted by electric motor. Hence, due to the reason of pollution-free, electric motorcycle become more and more popular in city traffic. Planetary gear trains can be used as the transmission systems for electric motorcycles. The purpose of this work is to do the kinematic design of three-speed planetary gear type automatic transmissions for electric motorcycles. First, according to the train value equation of planetary gear train, The reduction ratio equations of planetary gear type automatic transmissions can be derived. Then , based on these reduction ratio equations, the kinematic design of three-speed planetary gear type automatic transmission is accomplished. Based on the proposed methodology, all three-speed planetary gear type automatic transmissions can be synthesized.
The Possibility of Visualizing Temperature Fields Using Digital Holographic Interferometry
Authors: Vít Tomáš , Lédl Vít , Dolecek Roman , Psota Pavel
Published: March 2013

The presented paper compares results of measured temperature fields achieved by digital holographic interferometry (DHI) and hot wire anemometry. It shows the possibility of using holographic interferometry for the visualization of temperature fields in periodically moving fluids. The measurement of temperature fields in moving fluids has many inherent difficulties. The usage of point temperature measurement methods, such as Constant Current Anemometry (CCA), is limited to frequencies up to 3000 Hz. This frequency should be the limiting factor for using CCA in fluids when a rapid change of temperature occurs. This shortcoming of CCA measurements could be overcome through the use of optical methods such as digital holographic interferometry. It is necessary to employ a special holographic setup with double sensitivity instead of the commonly used Mach-Zehnder type of holographic interferometer in order to attain parameters sufficient for the studied case. This setup is not as light-efficient as the Mach-Zehnder type but has double sensitivity. The special technique of acquiring and phase averaging the results from holographic interferometry is presented. The paper also shows the first results of an evaluated 3D temperature field.
Design of Offsetting Steerable Mechanism for Rotary Steerable Drilling Tool Based on Double Eccentric Rings
Authors: Yan Zhi Dan , Geng Yan Feng , Wang Zi Fang , Wang Wei Liang
Published: March 2013

Precise control of the inclination and azimuth is of great significance for the efficient drilling of dynamic point-the-bit rotary steerable drilling tool. The design details of offsetting steerable mechanism for rotary steerable drilling tool based on inner and outer double eccentric rings are demonstrated in the paper. While drilling, the tool collar rotates and passes the torque and drilling pressure to the drill bit efficiently, and the stable platform mounted inside the collar is maintained geostationary by rotating it counter to collar rotation at the same frequency. And an offsetting steerable mechanism in the stable platform provides selectively and axially inclination to the collar by adjusting the relative position of the inner to the outer double eccentric rings. It is shown that the maximum oriented inclination can be reached as 1.0 degree flexibly for the presented structure.
Research on Influencing Factors of Enhancing Independent Innovation Ability for Scientific and Technological Enterprises
Authors: Li Xiang Dong , Shi Lu Kui , Yang Bo Jun , Wang Shuo , Hong Wei
Published: March 2013

Factors that influence the ability of independent innovation of scientific and technological enterprises mainly from inside and outside the enterprise. From the perspective of the enterprise's internal operations and external environment influences, through combinating business interviews and studying on related work, twelve concept generics influencing the ability enhancement of independent innovation for scientific and technological enterprises were established. Through analyzing content validity and project analysis, test items of the twelve concept generics were put forward. Sampling data was collected by using questionnaires. Construction validity and internal consistency reliability of the questionnaires were inspected. The factors composition influencing the ability enhancement of independent innovation of scientific and technological enterprises was analysed via applying the factor analysis method. The influence factors include innovation method and technology ability, efficient use of internal and external resources, policy and service environment, manufacture and profitability, system and talent management.
Study on Load of Hollow Motor Shaft by 4-Roll Cross Wedge Rolling
Authors: Yang Yong Ming , Cheng Feng Wen , Chen Jiu Chuan , Zhao Jun
Published: March 2013

Rolling force is the main parameters for calculating the intensity and rigidity of the main parts in the mill. To determine the force produced by the four roll rolling process, the finite element (FE) model for hollow motor shaft forming using 4-roll cross wedge rolling had been established for forming analysis with the aid of FE software Deform-3D. According to the results of FE simulation, the rolling load rules were obtained and maximum force of up to 60 KN. It has important theoretical significance and application value for the mill equipment designing and die structure optimization.
Analysis on the Drop of PCB Packaged by Cushion Material Based on Finite Element Method
Authors: Zhang Gai Mei , Guo Heng Yi , Lou Yue , Tao Qi Lu , Yuan Wei , Lu Jian Dong
Published: March 2013

This paper analyzes the stress of the printed circuit board (PCB) packaged by cushion materials after drop and investigates the stress of PCB under the different drop height, different cushion materials and different drop ground using ANSYS finite element software. The stress of PCB is analyzed quantitatively and qualitatively after drop, the results show: (1) The stress of the product is effected by drop height and the performance of dropping ground in a large extent; (2) The protect performance varies with the ways of cushioning packaging; (3) Within a certain range, the cushion material with smaller elastic modulus is better due to absorb the impact more energy and can bear the impact force is greater.
Manufacturing and Microstructure of Cu Coated Diamonds/SnAgCu Composite Solder Bumps
Authors: Zhong Y. , Zhang W. , Wang C.Q. , Li B.
Published: March 2013

Diamonds/SnAgCu composite solder bumps were prepared on Cu pad by mechanically incorporating diamond particles into Sn3.0Ag0.5Cu (SAC) solder paste and then reflowed at 260°C for 60s. Chemical copper plating method was proved to be an efficient way to achieve high addition amount of diamond particles (> 1 wt.%, which is much better than former studies) in solder, and to get solder bumps with better morphology. The spreading rate of this novel solder was turned out to be acceptable in operating range. Shear strength and microstructure of composite solder bumps were studied, showing that they could be influenced by the changes in morphology of the Ag3Sn net work caused by the various additions of Cu coated diamond particles.
Contact Finite Element Analysis of Spindle-Toolholder Joint
Authors: Song Xiao Lei , Cai Li Gang , Zhao Yong Sheng
Published: March 2013

A performance evaluation model for spindle-toolholder joint system is built by applying the contact finite element method (FEM). Contact detection is implemented at the Gaussian integration points of the contact elements. Contact state is determined by calculating normal distance and normal contact force between every two points on the contact surface. Friction state is determined by calculating tangential contact force. The determinations are introduced into the variable principle of nonlinear FEM based on pure penalty method. The updated FE equations are solved using the full Newton-Raphson method. Deformation and contact stress distribution are studied. The stiffness distribution is derived by calculating the displacement increments under the different forces, based on the stiffness definition. The proposed model can well illustrate and evaluate the joint performance.
A Centrifugal Microfluidics Platform for Potential Application on Immobilization-Free Bead-Based Immunoassays
Authors: Chen Qiu Lan , Cheung Ka Lun , Kwan Yiu Wa , Kong Siu Kai , Ho Ho Pui
Published: March 2013

In this work, we demonstrate a simple yet convenient centrifugal microfluidics, or lab-on-a-disc (LOAD) platform for bead-based immunoassays. The disc contains a network of passive valves for sample manipulation and a bead-aggregating barrier structure to instead of commonly used immobilization method. The narrow-channel structure not only provides a geometric barrier for retaining the beads, but also significantly increased fluidic resistance which results in lower flow rate and longer reaction time for each reagent in the reaction chamber. Centrifuge-forced beads densification in the small junction area and signal concentrating allows high signal sensing capability. The acceleration speed is optimized for largest signal-to-noise ratio. The device uses different rotation speed to trigger a cascade of flow events. The integrated platform contains all the necessary functional elements for conducting one-step parallel assays through a sequential protocol. For our test device, the total time required to complete an immunoassay experiment is typically under 6 minutes. Through this work we have also shown that the use of a geometric barrier for the aggregation of signaling beads is an effective approach for the enhancement of optical signals in common immunoassays. This flexible design is suitable for a broad range of bead-based immunoassays with low-cost and high-speed operation.
Static Recrystallization Kinetics Model of X70 Pipeline Steel
Authors: Tang Di , Xu Yao Wen , Song Yong , Wang Lei
Published: March 2013

The main purpose of this study is to develop a numerical model to describe the static recrystallization kinetics in X70 pipeline steel. In order to investigate the static softening behavior, double-hit compression tests were performed on a Gleeble-3500 thermomechanical simulator over a temperature range of 950-1150°C. The interpass time varies from 1-500s. Different values were applied to estimate effects of strain rate and deformation on static recrystallization. The results show that factors such as high temperature, long holding time and lower strain rate will lead to the inclination of softening behavior. The static softening activation energy was obtained. The good agreement between the predicted values and experimental results indicated the validation of the developed model of this study.
Explore on Green Construction of the Construction Engineering
Authors: Jin Jia Sheng
Published: March 2013

Green construction is a relative concept. For different countries and regions, according to the social economic, technical level, plan specific contents of technical innovation and the corresponding technical, economic indicators, in order to guide the development of the green construction. This paper expounds the connotation of green construction, the necessity of developing green construction, and probes into the construction of green in building engineering construction principle, carry out countermeasures and suggestions about how to put forward and speed up the construction of carrying out green in the construction engineering.
The Research and Application of Masonry Structure Reliability Rating Method Based on Extenics
Authors: Liu Ming , Song Bao Feng , Dias Daniel , Pan Jing
Published: March 2013

Aiming at masonry structure housing, establish the structure reliability evaluation index system. Subsidiary factors index dimensionless processing, the traditional matter-element model is analyzed, and based on this, the article puts forward an improved correlation functions, establish correlation function of the correlation factors of the index layer. Consider the weight coefficients of members,gave the extension index,combining analysis of the structural member reliability and extension comprehensive evaluation of the integral structural reliability, establish the masonry structure housing reliability assessment method framework. And prove the feasibility of this method through engineering examples.
Energy Audits and Energy-Saving Potential Analysis of the Science Building at Xi'an Jiaotong-Liverpool University in Suzhou
Authors: Jing Wen Long , Nayel Mohamed
Published: March 2013

A building energy audit was developed through a case study on the science building at Xi'an Jiaotong-Liverpool University (XJTLU). The annual energy consumption of the building was surveyed over a two year period. The building energy consumption characteristics were displayed and the corresponding energy saving potential was analyzed. Additionally, an energy saving methods is proposed based on the characteristics of the target building.
Temperature Sensitivity Analysis of Large Span PC Concrete Box-Girder Bridge
Authors: He Guo Jing , Lu Jie , Yi Jin
Published: March 2013

Setting in the youshui Bridge Project and referring to the stipulation on the temperature gradient in current code, this aims to investigate the effects on the stress condition of concrete box-girder bridges caused by the overall heating, cooling or standard temperature changes. The process was carried out by virtue of the general finite element analysis software—MIDAS/CIVIL. The result showed that temperature would greatly affect the structural behavior of a bridge, in particular that the stress condition of the top plate is sensitive to temperature changes. It was therefore suggested that climate conditions should be taken into consideration when determining the temperature gradient values in the code.
A Nonlinear Finite Method for Analysis Cable Structures’ Displacement
Authors: Wang Yang , Zuo Sheng Rong
Published: March 2013

In this paper a small strain elastic element is presented its utility is demonstrated through static displacement problems. Four different methods solve an example, like direct method, Newton-Rapshon method, Modified Newton-Rapshon method and use commercial software Ansys. The MNR method is the fastest method.
Experiment and Finite Element Simulation Analysis about Temporary Bracing
Authors: Yang Jian Guo , Yang Xiao , Ding Ke Wei
Published: March 2013

In this article ,through frame temporary support under combined slab, applied static load experiment on combined slab, compare with the force of temporary support and finite element simulation analysis,thus provide a scientific basis for this temporary support in the Housing Industrialization.
Determining Preconsolidation Pressure of the Lakeside New District Soft Clay of Hefei Based on Casagrande Method by Matlab
Authors: Shao Yan , Li Chang Yong , Wei Yuan
Published: March 2013

The preconsolidation pressure is an important index to determine the stress history of soil and also a major calculation parameter for the analysis of soil stratum’s deformation in the different stress history. Casagrade method is worldwide applied to determine the preconsolidation pressure. On the basis of research on consolidation test about the lakeside new district soft clay of Hefei by high pressure consolidation apparatus, and conformed to Casagrande method, the paper adopts quartic polynomial and least square method to fit the compression curve, and the preconsolidation pressure of the lakeside new distract soft clay of Hefei is determined by matlab software. The result provides reference for the calculation of foundation settlement considering stress history.
Analysis of the Diffusion Effect of a New Continuous Diffusion Furnace
Authors: Chen Rong Lian , Xiao Le , Zheng Rong Hao
Published: March 2013

A new continuous diffusion furnace is introduced in this paper and its workflow is briefly discussed. Within the analysis and statement about the diffusion principle, both junction depth and sheet resistivity are studied. Numerical analysis has been performed to simulate the temperature distribution in the furnace, with FLUENT software. Finally the values of sheet resistivity are calculated according to both temperature field models of continuous and traditional diffusion furnace respectively. Therefore, the new continuous diffusion furnace is proved to be feasible by the comparison of these values.
Application of Composite Sandwich Panels in Construction Engineering
Authors: Ding Ke Wei , Wang Gang , Yin Wan Yun
Published: March 2013

As a new constructional material, composite sandwich panels are applied in engineering more often than ever. This paper focuses on the structure and foreign research status of sandwich panels which are used in practical engineering problems that need attention. The structure of the composition of the sandwich panel, force characteristics and analysis methods, a set of load-bearing thermal insulation, sound insulation and decoration in one of the new sandwich insulation composite wall form, can comprehensively address architectural, structural safety, and contradict the thermal insulation performance and durability problem. Thus they can be better applied to the engineering practice and meet the development requirement of building energy-saving and adaptation of housing industrialization.
Study on the Development Path of the New Energy Industry of Ningbo
Authors: Liu Chun Xiang , Zhu Qiu Na , Yang Qi Zhen
Published: March 2013

As Ningbo City has laid a good foundation on the development and utilization of new energy as well as equipment manufacturing through rapid economic development, governments and enterprises pay great attention to the development of the new energy industry. This paper has analyzed the current status of Ningbo new energy industry in detail, exploring the key problems existing during its development and clarified the strategic plan, development path and supportive measures for its future development.
The Influence of FDI on Energy Efficiency of China: An Empirical Analysis Based on DEA Method
Authors: Luo Jing , Cheng Kan
Published: March 2013

Based the panel data of China from 1997 to 2008, this paper computes the regional total-factor energy efficiency (TFEE) in China by using the method of the data envelopment analysis (DEA) and then discusses the influence of regional FDI on local energy efficiency. The empirical results show that, FDI improved China's average level of energy utilization efficiency by technical and structural effect channels; the FDI in the eastern region and the central region improved local energy efficiency, however, western area FDI reduced the energy efficiency.
Study on Issues of Technical Upgrading and Sustainable Innovation of Energy Industry in Henan Province
Authors: Yang Jun
Published: March 2013

Applied with the methodologies of investigation, contrast and analysis this paper becomes more scientific, realistic and effective. Based on the careful study of the energy industry in Henan region the paper proposes some innovative and developmental suggestions. The study of the topic has testified that the local economic development nowadays much relies on energy than anytime before. Because of the oneness and finites of energy resources in Henan region there are very serious existing issues in Henan energy industry. If the increasing speed of energy supply lags behind the increasing speed of energy consumption Henan regional economy would be received a strong impact. The degree how the energy demand is met and the degree how safe the energy supply is, are even much important than manpower, capital and technology in determining the stabilization and growth of future economy. Pushcing on the technicval upgrading and suatainable innovation of energy industry should be the key tasks to remain the local economic growth in the future.
Technical Analysis on Energy Consumption of Chinese Household (1990-2009)
Authors: Qin Yi
Published: March 2013

Renewable energy sources have increased their share on electricity generation of China, in this paper assesses the role of both the amount and share of renewable energy consumption in economic welfare using production functions. The results of the paper show that the cost, structural demand, accounting mechanism and policy reasons of renewable energy development are interpreted.
Selecting Sustainable Renewable Energy Sources by Using a New Synthesis Method of Alternative Priorities for Benefits, Opportunities, Costs and Risks
Authors: Yang Shi Xu , Duan Wan Chun , Sun Yong He
Published: March 2013

Since the fossil fuel source is limited and it has influence on the environment, it is necessary to develop sustainable renewable energy sources. However, selecting sustainable renewable energy sources isn’t an easy task for its complexity. In this paper, a new synthesis method of alternative priorities is suggested to select sustainable renewable energy sources, with the considering of aspects of benefits, opportunities, costs and risks. Finally, a numerical case is given to validate the scientificity and feasibility of the approach.
Study on Dynamic Change of Carbon Emission in Zhengzhou
Authors: Li Ya Li , Qin Yao Chen
Published: March 2013

In order to explore the impact of the fossil energy consumption,industrial production and population on regional carbon cycle , this paper estimated the dynamic changes of carbon emissions from 2000 to 2009 in Zhengzhou based on the quantitative emission model proposed by IPCC and ORNL. The results show that the total carbon emissions in Zhengzhou was 48944.2 ×104t during 2000~ 2009, among which 83.3% came from fossil fuel combustion,7.7% from industrial production process and 9% came from population. The carbon emissions of fossil energy consumption and industrial production increases gradually.The carbon emission of coal was the highest among all kinds of fossil fuels,occupying 97.1% of the total emission of fossil fuel consumption. The carbon emissions increase progressively and surpass the national average level from 2000 to 2009 in China. And the carbon emissions for 100 million yuan GDP is increasing.Finally, some measures are proposed for the carbon emission reduction in Zhengzhou
Analysis of Energy Use and Related Carbon Emissions in Beijing and Shanghai
Authors: Zhang Jing , Guo Ru
Published: March 2013

Most Chinese cities are experiencing rapid urbanization and economic growth. It is needed to explore how a city’s energy system evolves and how it can be altered to reduce carbon emissions. This paper analyzed energy consumption and related CO2 emissions in Beijing and Shanghai. A rapid growth in energy consumption during the last two decades is evident. Shanghai presents higher energy intensity than Beijing, mainly due to the larger share of the secondary industry in economy. Energy consumption by the residential sector is higher in Beijing, despite a larger population in Shanghai. The CO2 emissions by the end-use energy in 2010 are 152 and 259 million ton in Beijing and Shanghai, respectively. Electricity usage presents an important share of energy consumption and CO2 emissions. Thus, development of renewable energy for electricity generation and improvement of the technologies in thermal power plants are important to reduce the future carbon emissions.
Strategy for Carbon Dioxide Reduction – A Case Study of China
Authors: Mu Rui Min , Zhan Li Wei , Jia Jing Jing , Yuan Xue Liang
Published: March 2013

In order to increase the ability of tackling with climate change, China has put many efforts on restructuring industrial sectors, improving energy efficiency and developing new and renewable energy resources. This study provides a critical assessment of various factors on reducing CO2 emissions with the method of scenario analysis. The results show industrial restructuring has marginal effect on CO2 emissions compared with improving energy efficiency and adjusting energy structure. To achieve the projected target on CO2 emissions reduction, a combination of optimized industrial structure and energy structure as well as improved energy efficiency is the proper scenario for China. The findings provide a useful reference for policy-makers to develop energy policies.
Study on Low-Carbon Development Status Quo and Countermeasures of Transportation in Shandong Province
Authors: Miao Pan , Guo Xia
Published: March 2013

The rapid development of the transportation industry in Shandong Province provides a fundamental guarantee for the economic and social development, but also brings a lot of energy consumption and pollutant emissions, directly affecting the construction of ecological Shandong. By investigating low-carbon development of the transportation industry in Shandong Province, this article analyzes the status of low-carbon development and identifies the problems: transportation structure is irrational; low-carbon development lacks corporate body; regulation of transportation energy saving needs to be strengthened. Put forward countermeasures for low-carbon development of the transportation in Shandong Province: speed up the construction of the integrated transport system; optimize transport organization; improve regulation of transportation energy; give full play to the leading role of science and technology to a low-carbon economy; strengthen low-carbon economic subject consciousness of transportation enterprises; develop public low carbon transport consciousness.
Improving Silicon Concentrator Solar Cells Performance by Dielectric Liquids Immersion
Authors: Han Xin Yue , Wang Yi Ping , Zhu Li
Published: March 2013

Direct liquid immersion cooling of concentrator solar cells was proposed as a solution for receiver thermal management of concentrating photovoltaic (CPV) systems. This research investigates the electrical performance of silicon concentrator solar cells under concentration, which are in both the absence of the candidate immersion liquids and also within different thickness on top. The results show that the presence of thin liquid layers results in an increase in the silicon CPV solar cells efficiencies by 8.5-15.2% from the reference value, arising from a decrease in a part of the reflected radiation and a decrease in the velocity of the surface recombination from surface adsorption of polar molecules. With an increase in the thickness of the liquid layer, the degree of the improvements to the efficiencies of the cells decreases due to more incident light is absorbed by the thicker liquid layer, which also depends to a noticeable degree on the liquid species.
Assessment on the Possibility of Low-Carbon Economic Development - Taking Zhejiang, China as a Case Study
Authors: Zhou Bin , Jin Lu , Zhang He , Deng Qun , Xu Jing , Hu Chun Li
Published: March 2013

Based on the principles of scientific, systematic, practicality, hierarchy, the paper constructs the evaluation index system of the Possibility of Low-carbon Economic Development, and determines the assessment of evaluation indexes applying the analytic hierarchy process (AHP), and builds the multi-objective linear weighted evaluation function model. Taking the Province of Zhejiang for example, the Possibility of Low-carbon Economic Development was evaluated. The results can be summarized as follows: The construction the evaluation index system of the Possibility of Low-carbon Economic Development is scientific and has a certain operability; The development of low-carbon economy in Zhejiang Province is potential, and the comprehensive evaluation has 4 levels; From certain aspects，such as the establishment and improvement of the low-carbon economy policy system，management system for carbon emissions and carbon exchanges，the introduction of foreign advanced low-carbon technologies，the promotion of low-carbon consumption and low-carbon lifestyle, measures can be taken to promote the development of a low- carbon economy in Zhejiang Province.
China’s Low-Carbon Economy Development: A Policy Suggestion
Authors: He Ge
Published: March 2013

There is an increasing concern about low-carbon economy development in China in the context of sustainable development. Based on analyzing the current situations and the constraints, this paper aims to present policy suggestion to realize China’s low-carbon economy development.
Research on China's Low Carbon Economy Financing and Investment
Authors: Xu Xiao Heng , Xu Chao
Published: March 2013

China's low carbon industry has achieved rapid development with the support of government policy. But there are still many problems to be solved, lack of money is a one of the main problems faced by the low carbon industry.This paper analyzed the present situation of financing and investment in low carbon economy, find that there are a series of problems in policy making and market financing regarding low carbon economy. It put forward suggestions in improving the financing and investment mechanism led by government and establishing the market mechanism to solve these problems.
New Petrochemical Industry Development Path Choice under the Restriction of Low Carbon Economy in Shandong Province
Authors: Wang Lei , Guo Xia , Miao Pan
Published: March 2013

Petrochemical industry is an industry of high energy consumption and high carbon emission. It’s the bounden duty for this industry to select the low carbon economy development path. This paper analyzes the development restricting factors of the present petrochemical industry. Furthermore, this paper expounds the development implementation path of the new petrochemical industry from the following five aspects, such as to optimize the low carbon energy structure, achieve the implementation of ecological construction both in industry and enterprises, increase the technical support and management support for the low carbon transition of petrochemical industry, strengthen the Omni directional penetration depth of the low-carbon awareness and so on.
Performance Research of a Solid Desiccant Material Regenerating Directly with Solar Energy
Authors: Yang Wan Sheng , Guo Huang Huan , Wang Zhang Yuan , Zhao Xu Dong
Published: March 2013

This paper studied the thermal and physical properties of a new solar solid desiccant material, including the equivalent thermal conductivity under different moisture content conditions and penetrability under different simulated solar radiation. The results showed that the equivalent thermal conductivity of the material was related to the moisture content and water saturation. In unsaturated state, the equivalent thermal conductivity increased with the increase of the moisture content and presented a linear relation in certain range. When reached saturation, the equivalent thermal conductivity decreased with the increase of the moisture content. These figures could provide the basis for the determination of the thickness of the dehumidification bed and optimization of the design of the dehumidification system.
Mode Research of the Coal Enterprise Low Carbon Management
Authors: Liu Zhong Wen , Zhao Jing Hui , Gao Peng Zhao
Published: March 2013

Faced with sharp inconsistent relationship between resource, environment and economy development, the extensive economic growth mode of high-energy consumption, high-pollution and high carbon-emission has not met the demand of low carbon-economy era. In light of the development of coal corporation and the needs of new times, the low-carbon operating and management mode which regards low-carbon innovation as the engine, regards low-carbon images as orientation, regards low-carbon management as support and regards low-carbon producing as core is designed and constructed.
Resource Allocation Optimization Problem on the Population Growth Model
Authors: Luo Yi Hong , Zhang Shu Guang
Published: March 2013

In this paper we mainly investigated the resource allocation optimization problem in three population models: death process, PDE model and birth and density-independent growth model. Considering the inﬂuence on population growth from different factors, ﬁnd the best proportion of population to obtain the biggest economic beneﬁt. Furthermore, we consider the effect on resource allocation from one more industrial structure on density-independent growth model. Finally, we compared the above models.