bluuebunny/crossref_metadata_2025 huggingface dataset:
Tests Results and Simple Structural Analysis of the Main Lighthouse in the Harbor of Livorno (Italy)
Authors: Giresini Linda , Sassu Mauro
Published: October 2013

The present work assesses the structural analysis of the main lighthouse of Livornos harbor. It is made by a r.c. framework, built in the 50s as reconstruction of medieval tower similar to it. The wind and seismic actions (with and without collaboration of the masonry infill and façade) are investigated, showing the fundamental contribution of the masonry layers for a satisfactory structural response.
Engineering Calculation and Application of Perforation Impact Dynamic Loads in Oil and Gas well
Authors: Li Cheng Bing , Liang Yong , Lou Zhong Kai
Published: October 2013

The perforation impact dynamic loads can destroy or disable the tubing strings. The perforated completion process was simplified to explosion of ordinary explosive charge in perforation liquid. The dimensionless expression of perforation impact dynamic loads was derived based on main influence factors and then its engineering calculation formula was set up. A well perforation operation in western Sichuan as an example, the oil tubing strings security was analyzed by the perforation impact dynamic loads from the engineering computation formula. The results show that the tubing strings only occur elastic spiral bucking and do not occur plastic deformation which are in line with perforation operation results on site.
The Design of Hydraulic Cylinder for Measuring the Contact Stress of the Bud Type Seal Ring
Authors: Zhang Xi , Zhao Zhi Min , Yu Miao , Wang Yan Yan
Published: October 2013

At present, the bud type rings are widely used in the hydraulic cylinder piston rod seal, but there is no corresponding detection method to measure the contact stress when the seals are in the dynamic sealing condition. However, the contact stress is very important for analyzing the performance of the seals. A method for measuring the contact stress is presented in this paper, and the design of major parts of the test cylinder and the selection of seals are emphatically introduced.
Effect of Accelerator Type on Dynamic Properties of Natural Rubber Vulcanizates
Authors: Gao Tian Ming , Huang Mao Fang , Li Pu Wang , Xie Rui Hong
Published: October 2013

The influence of accelerator M and accelerator NS on dynamic properties of NR vulcanizate was investigated by using rubber processing analyzer (RPA), flexometer and Nuclear Magnetism Resonance (NMR). The results showed that the degree of crosslinking density of NR vulcanizate by using accelerator NS was higher than NR vulcanizate by using accelerator M, the response of dynamic properties of vulcanizate to frequency and temperature was different, and the NR vulcanizate cured with accelerator NS had lower heat built up than NR vulcanizate cured with accelerator M.
ACO-Based Holes Machining Path Optimization Using Helical Milling Operation
Authors: Li Zhong Qun , Wang Xin , Dong Ya Feng
Published: October 2013

As a new-type, high efficient hole-making technology, helical milling is widely used in making holes on composites and composite-metal compounds materials in the aircraft industry. In this paper, the problem of machining path optimization using helical milling is converted to a TSP (Traveling Salesman Problem), a mathematical model is established and solved using ACO (Ant Colony Optimization). Simulation results show that with the application of ACO, the traveling efficiency of helical milling has been increased by 41.1%.
The Optimal Design of Thermal Insulation on the Pipeline by Using Particle Swarm Optimization
Authors: Lv Hong Yan , Si Xiao Dong , Wu Wen Zhen
Published: October 2013

Particle swarm optimization is simple, easily achieved and do not need to adjust many parameters. And it doesn't need the gradient information. Now, this algorithm has been widely used in function optimization, nerve network training, fuzzy systems control and so on. In this paper, we use this algorithm to solve the optimal design of thermal insulation on the pipeline. Numerical results show that this algrithm can get more precise results than methods before used.
Automatic Process Intermediate Model Generation in Process Planning
Authors: Zhang Xu , Liang Chao , Li Wei Yu
Published: October 2013

In process planning of machined part, three-dimensional process intermediate models are necessary for process design, documentation, and downstream applications including clamping design, NC programing, and process analysis. An automatic process intermediate model generation method is proposed in this paper for machined part represented in B-Rep solid model. Machining features are recognized and classified according to process type. Process plan is expressed in terms of machining features and feature surface modification operations in solid model. Local modification operations are applied to part model to move, replace or remove feature surface resembling machining process. Process intermediate models are generated automatically in a batch manner by applying geometry and topology modification operations directly on B-Rep model for each machining operation. The proposed algorithm is implemented in a CAPP tool developed in solid modeler ACIS.
Research on Dynamic Simulation and Analysis of NGW Planetary Gear Train Based on ANSYS
Authors: Hou Yu Bin , Jiang Shou Bo
Published: October 2013

The dynamic simulation and analysis of NGW planetary gear train was researched in this paper. The working types of NGW planetary gear train were discussed and the applying of boundaries and loads were established. Then the assembly models were established in ANSYS and a dynamic simulation was performed. Finally 5 groups of NGW parameters were taken to carry out a dynamic analysis. The results obtained by FEM were compared with those calculated by traditional method. The simulation results show that the gaps between FEM and traditional method are stable. The research provides a reference for the strength checking and design of NGW planetary gear train.
Finite Element Analysis on Dynamic Characteristics of Maglev Suspension System
Authors: Tang Jian Xiang , Jiang Xin Hua , Deng Jiang Min , Chen Te Fang
Published: October 2013

In this paper, electromagnetic dynamic characteristics of suspension system of middle-low speed maglev train are analyzed with finite element analysis (FEA) method based on the high-performance computing platform (HPC). The couple structure between F-type track and suspension magnet is meshed by pretension element. The dynamic characteristics of suspension system are simulated in three-dimensional model with 4 degrees of freedom motions condition. Both the numerical simulations and the actual force tests of suspension system are carried out with the same input. The result shows that the calculation accuracy of finite element analysis is high.
Residual Stress Analysis of TIG Welding Process of Thin-Walled Stainless Steel and Red Copper
Authors: Liu Han Wu , Huang Lei , Guo Xiang , Lv Yu Long
Published: October 2013

The connecting pipe in solar hot water system is made by TIG welding of thin-walled stainless steel and copper. As the welding of stainless steel and copper belongs to dissimilar metal welding and their physical properties are very different, thus the welding process is difficult and it is likely to cause a variety of defects in the welding process. In this paper, ANSYS software is used to simulate the welding process of stainless steel and copper, and the residual stress distributions in the welding process are obtained. The results show that: at the end of the welding cooling, large residual stress (253MPa) is remained in the junction area of the starting and ending position of welding, which is close to the yield strength of material at the same temperature. Therefore, there will be greater deformation in the junction area and more cracks inside. Meanwhile, the stress distributions of stainless steel and copper tubes in the welding process are greatly different. Different volume changes emerge in two tubes, which are harmful to the welding seam and also leads to the unfitness of dimensional tolerance of welding parts, resulting in the scrapping of welding parts. The results provide references and theoretical basis for the welding technology of dissimilar materials.
Computer Simulation of Aluminum Conductors Drawn in High Speed
Authors: Yang Ming Xue , Luan Jing Tian , Zhou Tian Guo , Zhang Xue Fei
Published: October 2013

Drawing speed is one important process in production over-head line, deform 3d software is used to simulate the drawing process. The distribution of stress-strain and temperature in different drawing speed with die angle and friction coefficient was investigated. The results shows that the aluminum conductors can be used in high speed drawing when die angle, drawing speed and frication coefficient of first pass is about11~13 degrees, 4~6m/s and 0.08~0.10 respectively, the uniformity of stress-strain and temperature is better for producing good quality over-head wires with high cold-drawing speed.
Simulation Study on Wax Injection for Investment Casting
Authors: He Bo , Wang Dong Hong , Li Fei , Sun Bao De
Published: October 2013

As investment castings grow in size and complexity, control of wax pattern dimensions becomes increasingly important and difficult. Conventionally, mold design and dimensions are re-worked by trial-and-error procedures until casting dimensions are produced within acceptable dimensional tolerances, increasing the cost of the castings.Nowadays, numerical simulation is an efficient tool for mold design. However, one of the critical difficulties in using computer models for the simulation of wax injection process is the lack of material properties of the wax. Material property measurements were conducted in this study that can be used as input in Moldflow. Then, 3D numerical simulation could be applied in analysis with mold design of thin-walled wax pattern, with high dependability. Simulation results of filling time and the location of the air traps were analyzed. Consequently, best gate location and reasonable gate system were determined. The paper highlighted the effectiveness of simulation in filling optimization and deformation of wax pattern.
The Lost Foam Casting Simulation of the Gray Cast Iron Linner
Authors: Yang Shu Heng , Du Xiao Ming
Published: October 2013

The lost foam casting process of gray cast iron linner was simulated in this paper by using the numerical simulation method to study the properties of the filling and solidification for lost foam casting. And the comparison of the simulated results with the practical casting obtained from foundry was implemented. The results show that the reasonable technical parameters were obtained: pouring temperature of 1400°C, foam density of 13 kg/m3, vacuum of 0.04MPa, coating thickness of 0.5 mm and coating permeability of 9.5×10-9m2/Pa·s.
Numerical Simulation for Fluid Flow of Flow Channel Structure in the Injection-Rolling Nozzle during Polymer Continue Injection Direct Rolling
Authors: Peng Huai Wei , Lou Yan , Lv Yong Hu , Wang Hai Xiong , Wang Chang Sheng , Li Ji Bin
Published: October 2013

IRN (injection-rolling nozzle) is the key component of the new Polymer CIDR (Continue Injection Direct Rolling) process, and it has higher requirements than the metal roll-casting nozzle. In order to achieve uniform exit velocity, a new type of structure of the flow channel which is called IRN flow channel structure is designed by combining with the two traditional flow channel characteristics, i.e. the fishtail and coat-hanger flow channel. Then numerical simulation was used to calculate the fluid field in IRN flow channel and analyze 3D flow phenomenon and characteristics. The simulation results show that it has a uniform exit velocity of the IRN flow channel with the value of about 0.06m/s.
Analysis of Metering and Billing Models of Private Pure Electric Vehicle Oriented Operation
Authors: Lin Jing Yi , Li Bin , Liu Chang , Chen Qi Chu
Published: October 2013

This article investigates different energy replenishment modes of private pure electric vehicles, analyzes and compares the merits and drawbacks of various metering and billing models of different modes, and explains the implementation methods of each model. Firstly, it sketches the development of electric vehicle industry; then, it introduces three electric vehicle energy replenishment modes, and brings forward three models for private pure electric vehicle owners. It elaborates the three metering and billing models for private pure electric vehicles oriented operation, by emphatically analyzing the implementation principles of each model. At last, it declares that the model based on charging amount is optimal for the whole vehicle slow charging mode, while the model based on mileage or the model based on discharged amount suits for the battery exchanging mode and hybrid mode.
Shaftless Driving Development Research on Sheet-Fed Offset Press
Authors: Wei Yan Bin , Zhang Hai Yan , Liu Chun Guo
Published: October 2013

shaftless driving is a kind of advanced and new drive way which can solve the high precision of printing synchronism, mainly used in gravure printing, soft printing and wheel transformation printing equipment but less used in sheet-fed offset press at present. Based on sheet-fed offset press as the research object, the author analyzed the transmission characteristics of sheet-fed offset press, designs a scheme of shaftless driving used in sheet-fed offset press and set up the hardware and software platform, verified the scheme by experiments.
Selection of New Energy Vehicle Fuels and Life Cycle Assessment
Authors: Huang Wei , Zhang Xin , Hu Zhun Qing
Published: October 2013

Life cycle energy consumption and environment emission assessment model of vehicle new energy fuels is established. And life cycle energy consumption and environmental pollutant emissions of new energy fuels are carried out. Results show that the full life cycle energy consumption of alcohol fuels is highest, and the full life cycle energy consumption of the fuel cell is lowest, and the fuel consumption is mainly concentrated in the use stage, and that is lowest in the raw material stage. And the full life cycle CO2 emission of methanol is highest, and the full life cycle CO2 emission of Hybrid is lowest. The full life cycle VOCHCNOXPM10 and SOX emissions of alcohol fuels is highest, and the fuel cell is lowest.
A Short Analysis of the Interactive Design in the Modern Product Design
Authors: Si Wen , Liu Li Li
Published: October 2013

With the development of the economic society, people gradually begin to pay more attention to the pursuit of product design compared to the product appearance and function. Thus, the present interactive design gets more and more attention in the product design. Choosing the daily product as the carrier, this paper mainly concludes and summarizes the interactive manner of the modern product design from the three aspects of the peoples feeling, behavior and affection in order to implement the interaction design methods research in the product design.
Study on Experimental Device of Removing TRS Gas with ClO2
Authors: Song Xue Ping , Xie Qiu Xia , Liang Dong Hua , Zhou Wei Qiang , Huang Kai , Lin Ji Zhen , Wei Wei
Published: October 2013

In order to remove the malodorous pollutants of total reduced sulfur (TRS) produced by kraft pulp mill, the experimental device was designed to remove the TRS gases in accordance with the principle of ClO2oxidizing TRS gases. After ClO2oxidizes TRS gases, the substances produced are absorbed by lye, which achieve the purpose of removing TRS gases. At the same time, these alkali absorber can be reused to the sulfur cycle of kraft pulp mills. With the self-designed experiment apparatus, the removal rate of H2S and CH3SH are 99.40% and 99.8% respectively, the concentration of H2S reduces from 1.275g/m3to 0.137mg/m3, the concentration of CH3SH reduces from 1.457g/m3to 0.032 mg/m3, which both reach national grade iii emission standards.
Design of Test Bench for Automotive Leaf Spring
Authors: Hao Kai Ming , Xu Wu Bin , Li Bing , Feng Xiao Long
Published: October 2013

For improving the conditions of single function, low testing precision, complex operation that exists in the tests of leaf spring testing machine, and on the basis of relevant provisions GBT19844-2005 leaf spring, a test bench for leaf spring with multifunction is designed. Through the structure analysis of leaf spring, a structure scheme of test bench named gantry type is put forward, combined with the testing requirements of the national standard and the spring stress characteristics, the hydraulic loading system and PID(Proportion Integration Differentiation) control system is proposed as well. By this test bench, experiments of the leaf spring for "permanent deformation, stiffness, fatigue" and other aspects related can be conducted, with shorter experimental cycle and higher experimental precision.
The Research of Nano-Mechanical Properties of Mono-Crystalline Silicon
Authors: Yang Xiao Jing , Zhang Wei Xing
Published: October 2013

The research of the nano-mechanical properties on mono-crystalline silicon by nanoindention technology is reported in this paper . Using the calculation method given by Oliver and Pharr, the hardness and the elastic modulus of mono-crystalline silicon are gained from the load-penetration depth curve. The simulation on mono-crystalline silicon in the plastic phase is carried out by ABAQUS. Based on the bilinear constitutive law and approximate relationship between the hardness and the yield strength, the obtained load-penetration depth curve through the finite element method is compared with the materials actual load-penetration depth curve and good correlation is achieved.
The Design of Instant Messaging System Based on Qt-Android System
Authors: Wei Ya Kun , Zuo Ling Xuan , Shao Chun Bo , Fu Yu , Wan Yi
Published: October 2013

The main research work and its technical characteristics of this article are: Apply Java language, MySQL database to complete the design and development of instant messaging software on the basis of cross-platform Qt development framework and Android operating system, reflecting the cross-platform design ideas; the introduction of a multi-threaded server based on decision tree and decision-making mechanism, after the original user message encrypted MD5 algorithm, information is placed in UDP packets for network transmission, so that the system has excellent time response and security feature. In order to optimize the man-machine interface, with the QT development platform, the client adopt the popular MVC design pattern and decorative design pattern.
Non-Logistics Indicators Evaluation of Workshop Process Layout
Authors: Ma Zi Qin , Wang Dong Yi , Wang Tao , Sun Li , Cheng Qiang , Wei Jiang
Published: October 2013

The non-logistics factors are very important the same as the logistics factors are to affect the decision-making of the enterprise workshop process layout. A large of typical non-logistics factors were analyzed and summarized after query and study of information and sites about workshop process layout. Then the non-logistics evaluation index system and evaluation standard were proposed. The weights of non-logistics indicators were determined by AHP. According to SLP, the non-logistics evaluating of layout project was carried out. The result should be supplied as the scientific basis for the layout decision. The example was presented.
Research on Core Competitiveness of Chinese Retail Industry Based on O2O
Authors: Ji Shou Wen , Sun Xiao Yuan , Liu Dan
Published: October 2013

The emergence of e-commerce retailers is a huge impact on traditional retailers. However, with the development of the network, drawbacks of online shopping gradually appear. The traditional retailers and the e-commerce retailers are facing long-term development difficulties. The emergence of O2O has brought the retail industry a further development. This paper mainly discusses the key points and the business processes of O2O as well as the vertebral body model of retail enterprise's core competitiveness based on O2O. After analyzing the development of Chinese retail industry, the author tries to do a research on the core competitiveness of Chinese retail industry based on O2O and thus provide some advices for the development of Chinese retail industry.
Research on the Selection of Logistics Service Innovation Mode Based on Industrial Clusters
Authors: Ji Shou Wen , Li Hui , Shi Hong Wei
Published: October 2013

Based on logistics industry clusters, the paper discusses innovation mode selection mechanism. Firstly, it expounds theories of logistics industry clusters. Then based on AHP, the key factors considered in the selection of innovation mode are used as the system of the measurement indexes, establish the AHP model, construct the judgment matrix and analyze data, obtain the weight coefficients of different logistics modes and do with consistency check. Finally, analyze results and make a conclusion. This method transfers the problem of qualitative into quantitative one and helps logistics clusters on mode selection problem of decision-making, thus contributes to innovation activities of logistics industry clusters.
Study on Situation and Countermeasures of College Students' Self-Employment
Authors: Yao Ying , Meng Xing , Yu Yan Ru
Published: October 2013

With the severe college students’ employment situation, self-employment becomes a new way for college students’ employment. This paper firstly analyzes the situation and main problem of college students’ self-employment. And in view of the problems, this paper sums up some countermeasures.
The Impact of V/III Ratio on GaN Growth by HVPE
Authors: Yu Hui Qiang
Published: October 2013

Thick GaN films grown with different V/III ratio on sapphire by hydride vapour phase epitaxy have been investigated. The V/III ratio is changed from 240 to 30. All the GaN films, which are n type, show only (0002) oriented peak and have the band emission with no yellow luminescence bands. When V/III ratio is 30, the full width at half maximum of (0002) X-ray rocking curve is the smallest, line-width of the band edge emission is narrow, the surface morphology shows step-flow growth and the growth rate is the highest.
Research Status of Carbon Fibre-Reinforced PEEK Composites
Authors: Liang Qun Qun , Wu Xiao Qing
Published: October 2013

The fundamental performance as abrasive resistance, mechanical performance, heat resistance, process technology of carbon fiber reinforced poly (ether ether ketone) composites, and the application of space and automotive industry was discussed in detail. The development trend of PEEK was forecasted.
Preparation and Characterization of Coprecipitation-Derived Ferromagnetic Glass-Ceramic for Hyperthermia Application
Authors: Liu Jian An , Zhang Mei Mei , Yang Xue Na
Published: October 2013

Ferromagnetic glass-ceramics could be used for magnetic induction hyperthermia. A ferromagnetic glass-ceramic in the system SiO2-Na2O-CaO-P2O5-Fe2O3has been prepared by melting of the coprecipitation-derived precursor. Using the coprecipitation-derived method, the molecular-scale homogenously glass precursor was obtained. This glass-ceramic contains a unique magnetite crystals precipitate during cooling from melting temperature without any nucleation and crystallization treatment. The crystallization of the glass systems with different component has been systematically investigated by using XRD, as well as vibrating sample magnetometer (VSM).
Effect of Minor Silver Addition on Microstructure and Properties of Al-8Zn-1.Cu-1.3Mg-0.1Zr Alloys
Authors: Wu X.Z. , Xiao D.H. , Zhu Z.M. , Li X.X. , Chen K.H.
Published: October 2013

Effects of minor silver addition on microstructure, mechanical properties and corrosion resistances of Al-8Zn-1.Cu-1.3Mg-0.1Zr alloys were investigated using optical microscope (OM), scanning electron microscopy (SEM), mechanical properties and corrosion testing. The results show that minor silver addition decreases the recrystallization and corrosion resistance of the t77-tempered alloys.Tensile strength of the based alloy was increased by the 0.1 wt% silver addition.
Domestic and Overseas Research Status on Molybdenum Resources and its Use
Authors: Feng Han Kun , Cai Zong Ying , Li Yun Gang , Qi Yan Fei
Published: October 2013

According to physicochemical property of molybdenum, the application of molybdenum is elaborated from three aspects that are molybdenum element, molybdenum alloys and molybdenum compound; The distribution of nature resource of molybdenum at abroad and home and the source of recoverable resources are summarized; the production method of ammonium molybdate is introduced which are oxidation roasting and wet oxidation, and the extracting method of molybdenum is introduced which is reduction method; the development tendency of molybdenum is pointed out.
A Modified Yoshida-Uemori Constitutive Model and its Application to Cold-Bending in Weldox960
Authors: Fu Ling , Deng Chuang Hua , Ren Hui Li , Zhong Yi , Zhou Hao
Published: October 2013

This paper presented a modified Yoshida-Uemori constitutive model to describe the stress-strain responses of tempered sorbite steel under cyclic loading. In this model, a mutational yielding surface and an isotropic hardening surface were defined in stress space and strain space for the description of Bauschinger effects, respectively. Then this model was used to simulate tension-compression tests of Weldox960 steel and study the springback and reduction of thickness in cold-bending. Results obtained from the experiment and simulation show that this modified model is valid in predicting cold-bending forming and springback.
Preparation and Magnetic Properties of FeSi/SiO2 Nanocomposites with Core-Shell Structure
Authors: Geng Zhong Rong , Li Yu , Yan Ren Jie , Wang Cheng Bing , Ling Xiao Ming
Published: October 2013

FeSi/SiO2 Core-shell nanoparticles were synthesized by DC arc-discharge approach and annealing process. The products were characterized by SEM, TEM, EDX, XRD and VSM. As-prepared FeSi/SiO2 Core-shell nanoparticles have the diameter of 40-100 nm and the thickness of the SiO2 shell is about 20 nm. The growth mechanism based on the crystallographic and thermodynamic theory was explained. Magnetic characterization was carried out and the results showed that the FeSi/SiO2 Core-shell nanoparticles exhibited superparamagnetism characteristic at room temperature.
The Ternary System Phase Equilibrium of KCl-NH4Cl-H2O at 80°C
Authors: Zhao Bin , Geng Guo Yue , Chen Jian Xin , Zhang Shao Feng , Li Yin Hui , Lu Ai Dang
Published: October 2013

The ternary system of solid-liquid phase equilibrium relation of KCl-NH4Cl-H2O was studied at 80 °C. The solubility data of KCl and NH4Cl in water were obtained by isothermal equilibrium method, and the phase diagram of the system was plotted. The result showed that this system exist six phase regions: i.e. the unsaturated solution region, pure KCl , pure NH4Cl, the solid solution base of KCl, the solid solution base of NH4Cl and their common crystallization region with the solid solution base of KCl and the solid solution base of NH4Cl crystallization regions. Some crystallization area will be changed with the various temperature, According to the phase diagram, it can be calculated the quantity of evaporated water in the crystallization process of KCl-NH4Cl-H2O and controlled the change of concentration in the evaporation process preferably.
Study the Effect of HAp Content in PLA/HAp Microsphere on the Efficiency of Drug (Clindamycin) Loading Process
Authors: Pradid Juntima , Keawwattana Wirunya , Tangbunsuk Siree
Published: October 2013

An ultrasound field was applied to obtain Polylactic acid (PLA)/Hydroxyapatite (HAp) biocomposite microspheres with the specific core-shell structure to be applied as a carrier of a drug. The hydroxyapatite was obtained from crocodile bone by thermal process. Sample characterization was achieved by powder X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDX) Scanning electron microscopy (SEM) and High Performance Liquid Chromatography (HPLC). As the result, the PLA/HAp loading clindamycin with different polymer-to-ceramic part wt.% ratio (100:0, 90:10, 80:20, and 70:30) showed the agglomeration of sphere-like particles. In addition, the loading efficiency of clindamycin increased with increasing HAp content up to 20%.
The Effect and Mechanism of Apoptosis on Hela Cells Induced by Bufotalin
Authors: Chao Xu , Zhou Xiao Jun , Dong Chang Hu , Zheng Gang
Published: October 2013

Cytotoxic activity of Bufotalin was determined by MTT assay at various concentrations ranging from 0.002 to 0.008 μmol/ml on Hela cells. The Apoptosis and its mechanism induced by Bufotalin was also studied. The results showed Bufotalin displayed the marked inhibition effect to Hela cells and the IC50 value is 0.0045 μmol/ml for 24 hour. The procaspase-3,-8 and-9 decreased and their active cleaved forms increased treated with Bufotalin at concentrations from 0.002 to 0.006 μmol/ml. These data suggest that the pro-apoptotic effect of Bufotalin is mediated through activation of caspases and mitochondria in Hela cells.
The Study on the Process and Mechanism of Explosive Hardening of Hadfield Steel by a New Flexible Explosive
Authors: Wang Feng Ying , Gao Xue Hao , Liu Tian Sheng
Published: October 2013

The process of explosive hardening of hadfield steel by a new flexible explosive was researched, and the change of hadfiled steel metallurgical structure was observed. The results show that: 1. Three times of explosive hardening by using 3mm explosive fill the demands of process (the surface hardness above 350HB,the hardening depth above 20mm,the sinkage below1.2mm and no crack in the surface);2. The hardness increment is decrease with explosive times increasing, and the hardness increment increase with the sinkage increasing;3.The internal hardness of the unprocessed hadfield steel is invariable basically, and the surface hardness is slightly fewer; the hardness of the hadfield steel hardening three times plunges largely when depth form 0mm to 2mm, and decreases gradually under 2mm.4.Grain refining, multiplication of dislocation and grain boundary sliding lead to the hardening of hadfield steel.
Study on Displacement Prediction Model of Foundation Pit
Authors: Song Qiang , Zhang Jun Jian , Liu Yun Sheng
Published: October 2013

The prediction model is proposed in this paper to predict the displacement of foundation pit. In the model, genetic algorithms is applied to optimize the node function of the neural network (15 node function coefficients are optimized simultaneously). Next, do the further optimization to the model, and GA-transFcn3 Model is established whose fitness evaluation takes into account the multi-step prediction error. Finally, it is verified that the GA-transFcn3 Model created in this article has the desirable prediction accuracy through engineering examples. The establishment of GA-transFcn3 Model can provide researchers and engineers with ideas and methods for the displacement prediction of foundation pit, and can be popularized and applied in practical projects.
Learn from Tradition: Utilizing Traditional Building Materials in the Post-Earthquake Reconstruction
Authors: Hou Chao Ping , Wu Hao Rui
Published: October 2013

The post-earthquake reconstruction aims to assist the earthquake survivors return to their normal lives physically and mentally. This paper examined three post-disaster reconstruction cases occurred in the west of China and deciphered that facing the short-term and massive projects in the reconstruction process, the decision makers and designers utilized the non-local materials and modern technologies produced plenty of modern structures which were not completely fit the local social and physical environments. After conducting fieldtrips and interviews in these quake-hit areas, this paper suggested the decision makers and designers to learn from the local traditional architectural design and construction methods in order to improve their design to be suitable for the local unique cultural and physical backgrounds. To be continued, this paper proposed some improvements regarding using the modern technologies to strengthen the advantages of traditional building materials and technologies as well as avoid the traditional architectural practices weaknesses.
Summary of Performance and the Application of the Concrete Filled Steel Tubular Structures
Authors: Gong Jing , Li Jia , Tang Yue , Miao Yuan
Published: October 2013

Due to the restraint of steel tube concrete of concrete filled steel tubular components，three directions’ compression at the same time， the bearing capacity of concrete is obviously improved.As a result of the existence of steel pipe concrete，can effectively prevent the steel tube of local buckling ，com-plementary advantages and disadvantages of these two kinds of material ， the performance of the material is greatly improved. In this paper, the performance and characteristics of the composite material has carried on the detailed instructions，the ultimate bearing capacity of calculation principle has carried on the detailed analysis and research， the application of this new type of material are summarized.
Experimental Study on the Effects of Pumice Powder to Cement Soil
Authors: Wen Yong Qin , Shen Xiang Dong , Niu Lei , Cui Ya Ping
Published: October 2013

With pumice as the additive agent used in cement composite soil . In order to test the strength of the composite cement soil, the unconfined compression resistance were tested in the lab with different additive quantity (4%,8%,12%,16%), different curing periods (7d,28d,60d), The results show that the strength of the composite cement soil are significantly increase with increasing curing periods , with increasing additive quantity the strength variation of the composite cement soil first added, and then reduces. there is an optimum amount 8%.The pumice powder may evidently improve the mechanical properties of soft soil which has the characteristic of rich-water content, when water content from 12% to 19%, the strength of the composite cement soil are increased about 20%.
Research Status and Proposals of Basalt Fiber Reinforced Concrete
Authors: Wang Hai Liang , Zhong Yao Hai
Published: October 2013

With the characteristics of wide range of sources of raw materials, environmental protection and cost-effective, Basalt Fiber, which is used as a kind of reinforced material of concrete, has received the attention of civil engineering. This paper summarizes the research status of Basalt Fiber Reinforced Concrete in China and abroad, and put forward proposals for the research of Basalt Fiber Reinforced Concrete.
Effect of Nano Fibre Arrays on the Peel Strength between Low-Density Polyethylene Film and Aluminium Foil
Authors: Wang Jian , Chen Hong , Yuan Zhi Qing
Published: October 2013

In order to realize the adhesion between low-density polyethylene film and aluminium foil. Several nanofibre arrays were fabricated on low-density polyethylene film by template method to imitate strong adhesive nanohairs on the feet of gecko lizards. The results showed that the nanofiber arrays greatly improved the peel stength between low-density polyethylene film and aluminium foil and met the actual requirement. The peel strength increased with the decrease of the adjacent distance of the nanofibre arrays. when the distance and height of nanofibre kept unchangable, the peel strength increased with the deccrease of the diameter of the nanofire when the diameter is larger than 500nm. The peel strength decreased with the deccrease of the diameter of the nanofibres when the diameters were smaller than 500nm. The peel strength increased with the increase of the height of the nanofibres when the heights of nanofibres were lower than 5μm. When the heights of nanofibres were higher than 5μm, the peel strength decreased with the increase of the heights of nanofibre arrays.
Protection Effectiveness of Concrete Surface Treating Materials
Authors: Teng Li Wei , Huang Ran , Zou Si Yu , Hsu Hui Mi
Published: October 2013

This study was aimed to evaluate the protection effectiveness of various concrete surface treating materials. Four types of surface treating materials and six parameters were selected. Compressive strength test, absorption test and permeability test were performed. Taguchi method was adopted to identify the key factors influencing the protection effectiveness provided by the surface treatment. L16(81Î26) orthogonal array was chosen to reduce the number of experiments. The major sequentially influential factors are type of coating material, w/c ratio of concrete substrate and coating thickness.
Experimental Study on Low-Temperature Cold Cutting Technology
Authors: Li Ji Lin , Zhu Lin
Published: October 2013

With the development of environment-friendly cutting technology, the low-temperature MQL technology emerged. In order to solve the problem that caused by cutting heat, it adds the cold air on the foundation of MQL. In the view of low-temperature MQL studies which could reduce the cutting force and heat, we have done a lot of experiments. The experimental results show that the most important reason why the low-temperature MQL can reduce the cutting force effectively is a reliable lubricant film that between tool and chip. At the same time, the cold air take away a large amount of heat thereby is reducing the temperature of the tool, so that extending the tools service life.
The Effect of Inclusions on Internal Cracks for 20Mn5N Steel Ingot after Forging
Authors: Gao Jin Zhu , Fu Pai Xian , Liu Hong Wei , Ma Xiao Ping
Published: October 2013

The heavy forging ingots of steel 20Mn5N have been extensively used to fabricate the hydropower shaft steel, which plays as an extremely important part in industry. However, the quality of the heavy ingots has been commonly affected by various inner defects. One of the most typical defects is internal cracks, which has been found to be always accompanied by inclusions. In order to effectively analyze the formation of internal cracks, a 30-ton 20Mn5N ingot has been cut along the axle plane. Exceeding macroscopic cracks can be found in macro-segregation area gathered many large and grid inclusions (Al2O3). Based on the experimental results and FEM simulation method we have investigated that large and grid inclusions accompanied by other macro-visible defects such as banded structure could lead to the forging cracks easily. FEM simulation result shows that the stress concentration resulting from the large and grid inclusions (Al2O3) is relatively large. These large and grid inclusions accompanied by banded structure are the fundamental cause of cracks.
Effects of Parameters on Surface Roughness of Metal Parts by Selective Laser Melting
Authors: Qin Qun , Chen Guang Xia
Published: October 2013

The primary goal of this research is the effects of laser process parameters on surface roughness of metal parts built by selective laser melting. The main processing parameters used to control the surface roughness of melted layers are laser power, scanning velocity and overlap ratio. In our work, an orthogonal experimental design was employed to find the changing rules of the surface roughness through changing SLM processing parameters. The results show that the overlap ratio is the most important factor to affect the surface roughness. When the overlap ratio is below 50%, the surface roughness value of melted layers will decrease with laser power density increasing. When the overlap ratio is higher than or equal to 50%, the surface roughness value increases with the laser power density increasing. The optimal parameters of laser power 143W, scanning velocity 5m/min and overlap ratio 30% can be used to achieve melted layers with the best surface quality in our experiments, and the roughness value increases with slicing thickness increasing and the surface bias angle decreases.
First Stage Detection of Node Capture Attacks in WSN Based on Cloud Model
Authors: Peng Lu , Zhang Guang Wei , Xu Xiao Bin , Sun Qi Bo , Yang Fang Chun
Published: October 2013

As a typical application of Internet of Things (IoT), the issue of protecting security of WSN will be an important problem effecting the expansion of IoT. Since the nodes of WSN are always arranged in an open environment, they are easy to be captured by adversaries. Traditional detections of capture always judge the attack by comparing the absence time of nodes with a certain threshold. In actual applications of WSN, the uncertainty of radio environment and transmission ability of nodes incurs problem of determination of threshold. According to the quality-quantity uncertainty conversion ability of Cloud Model, it is practical to calculate the absence time of nodes in a certain area, to establish the cloud of wireless environment. The threshold will be determined by cloud of wireless environment. Then, Cloud-based First Stage Detection (CFSD) is proposed to detect the node capture attacks in WSN. Simulation results verify that this approach can improve the accuracy of detection and decrease the false alarm probability.
Synthesis, Characterization and Antibacterial Activity of ε-Polylysine/PVA Biodegradable Film
Authors: Tan Zhi Lei , Xia Miao Miao , Jia Shi Ru , Yao Fang Lian
Published: October 2013

ε-polylysine (ε-PL) was blended with polyvinyl alcohol (PVA) to obtain biodegradable films. Blends and neat polymer films (PVA) were characterized for their structural and mechanical properties as well as antibacterial activity. The addition of ε-polylysine reduced Young modulus (Eyoung), tensile strength (TS) and elongation at break (%E) of the ε-polylysine/PVA film. The ε-polylysine/PVA film shows good antibacterial activity and therefore has potential applications in packaging industry.
A Concatenate Code for Error Correcting Code in Bit Pattern Media Recoding System
Authors: Timakul Sekson , Koonkarnkhai Santi , Kovintavewat Piya , Choomchuay Somsak
Published: October 2013

Bit Pattern Media Recording (BPMR) is the modern HDD recording technique which can overcome the constraint of conventional technique by offering tremendous areal density. However, narrow track of BPMR can cause noise generating from inter-track interference (ITI) and In. inter-symbol interference (ISI). One traditional technique used to improve BER of the system is the introducing of error control coding. In this paper, we investigate concatenate code applied to BPMR. We proposed inner code with low-density parity-check (LDPC) and Reed-Solomon (RS) codes as outer code. The obtained simulation results confirmed to us that the concatenated coding scheme yielded better performance compared with the single LDPC code deployment.
New ART2/ART2A Algorithm Apply to Entire Real Number Field
Authors: Xu Yong Cheng , Li Yue , Shen Guo Ji , Dong Bin
Published: October 2013

In this paper, two shortcomings of standard ART2/ART2A algorithm were revealed through theoretical analysis: (1)Standard ART2/ART2A algorithm is only suitable for the case in the nonnegative real number field because of a limit of pretreating process in F1layer; (2)Even through all input patterns are shifted to the nonnegative real number field through coordinate transformation, the standard ART2/ART2A algorithm can not correctly recognize those patterns which have same phase, but different amplitudes. As a result, the standard ART2/ART2A algorithm is not quite suitable for universal pattern recognition. So this paper presented a new nonlinear transforming function in F1layer and a new competitive learning formula in F2layer for traditional ART2/ART2A algorithm. The applicable scope of the new ART2/ART2A algorithm is expanded to entire real number field from nonnegative real number field. The result of typical calculation example shows that the presented algorithm is effective.
Reliability Model of Motorway Emergency Communication System
Authors: Siergiejczyk Mirosław
Published: October 2013

The paper presents some issues related to reliability model of a motorway telematics systems, in particular emergency communication system. Optical system architecture was presented and functions of the various subsystems, too. Analyzing the functional structure and method for transmitting information in a highway emergency communications system a method to calculate the reliability of the system was proposed. To assess the reliability of the emergency communication system, as a system repairable, availability index was also proposed.
Analysis of Power Supply Maintenance in Transport Telematics System
Authors: Siergiejczyk Mirosław , Rosiński Adam
Published: October 2013

Issues concerning maintenance of power-supply for transport telematics systems were presented in this paper. Relationships graph was presented, and then Chapman–Kolmogorov system of equations was derived to describe it. Drawing on those equations, relationships for calculating function of probability of system staying in state of full ability SPZ, state of the impendency over safety SZB1and SZB2as well as state of unreliability of safety SBwere derived.
A Control of Modified Optical Scanning and Tracking Head to Detection and Tracking Air Targets
Authors: Gapiński Daniel , Stefański Konrad
Published: October 2013

The dissertation presents the method of controlling the designed scanning and tracking head (optical target seeker) [ which is used for detecting and tracking air targets emitting their own radiation, e.g. infrared radiation. The control algorithm consists in using the phase trajectories of control deviations. Digital simulations of the proposed solution have been conducted. The results of those simulations have been presented in a graphical form.
Conventional and Fuzzy Force Control in Robotised Machining
Authors: Hendzel Zenon , Burghardt Andrzej , Gierlak Piotr , Szuster Marcin
Published: October 2013

This article presents an application of the hybrid position-force control of the robotic manipulator with use of artificial neural networks and fuzzy logic systems in complex control system. The mathematical description of the manipulator and a closed-loop system are presented. In the position control were used the PD controller and artificial neural networks, which compensate nonlinearities of the manipulator. The paper presents mainly the application of various strategies of the force control. The force control strategies using conventional controllers P, PI, PD, PID and fuzzy controllers are presented and discussed. All of the control methods were verified on the real object in order to make a comparison of a control quality.
Hybrid Expert System for Diagnosing MOS Transistors
Authors: Drabarek Józef
Published: October 2013

This article presents a hybrid expert system which consists of a symbolic expert system and a genetic algorithm being connected to it. When a fault location diagnosis is not correct or the symbolic expert system is not able to locate a fault due to the lack of knowledge, the user may use the knowledge of the genetic algorithm. A MOS transistors were chosen as the object of diagnosing for the purpose of testing of the hybrid expert system.
Laboratory Control and Measurement System of a Dual-Fuel Compression Ignition Combustion Engine Operating in a Cogeneration System
Authors: Wierzbicki Sławomir
Published: October 2013

Electrical energy production from renewable energy sources is currently one of the key directions of conducted research. This paper describes a developed laboratory control system for the operation of a dual-fuel compression ignition engine in which the main fuel charge is fed in the form of biogas with variable composition, it also describes a system enabling the measurement of waste heat from this engine.