bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Implementation of Online Virtual University Life System
Authors: Cai Xing Quan , Lu Hao , Yu Hua Qing
Published: August 2013

In this paper, we present an online virtual university life system based on North China University of Technology life. Our system can help freshmen to get a better understanding of university life and life. We present the framework of our system and our system contains tasks management, campus information show, player roaming, system guidance, database management, etc. Finally, we implement our system and our experiment has proved our method is effective. Our method has been used in practical projects.
Power Loss Analysis Based on Leakage Currentin PN Junctions
Authors: Pengchan Weera , Phetchakul Toempong , Poyai Amporn
Published: August 2013

This paper is proposed to analyze the power loss from leakage current in p-n junctions in case of non-uniform defects. The different geometry p-n junctions have been fabricated by a standard 0.8 micron CMOS technology. The diode fabricated by the ion implantation process with two different condition. The reverse current and voltage (I-V)characteristics at varied temperature of p-n junctions have been measured. The power loss coefficient can be extracted from the leakage current versus temperature. Form the derivative of leakage current with temperature, the power loss with prediction trend curve can be obtained.
Localization and Recognition of Different Vertebra Tissues Based on Eddy Current Detection Method
Authors: Liu Wei Wen , Jiang Kai , Zhao Hui , Wang Cheng Long
Published: August 2013

The spine, which is throughout the trunk, is of great importance to the skeleton structure of human beings. For spine is vulnerable, the rate of spine incident trauma injury is relatively high. In the contemporary technology, the internal fixation prosthetics with implanting pedicle screws is the most efficient way in clinical treatment. However spine internal fixation surgery has many disadvantages like complex in the operation, the high penetration rate and inability to be used in the field battle. As a result, according to the magnetic property difference of different vertebra tissues, an eddy current detection method which is used in localization and recognition of different vertebra tissues to realize the navigation of spine internal fixation surgery is proposed in this paper. A set of improved series-reverse-three coils eddy current sensor is used to test the NaCl solution which electrical conductivity matches that of biological tissue. And the result of several experiments indicates this method can detect the biological tissue with the electrical conductivity no less than 0.5 S/m, which lays a solid foundation to further study of recognition different vertebra tissues.
Code Rate Estimation Algorithm for BPSK Signal Based on Wavelet Transformation
Authors: Wang Huan , Li Chang Xing , Li Yong Zhuang
Published: August 2013

A wavelet transformation based estimating algorithm for the symbol rate of BPSK signals is adopted . This method extracts baseband signal from the generated BPSK modulated signal by means of different ways, utilizing the modulus of wavelet transformation coefficients of this baseband signal to construct a singular pulse sequence consistent with the code rate of original modulated signal. Theoretical analysis on the power spectrum of this singular pulse sequence indicates that there exist discrete spectral lines in the integral multiples of baseband signal symbol rate, thus detecting these discrete spectral lines can achieve the estimation of signal symbol rate. Our proposed algorithm can estimate the signal symbol rate under the low SNR condition.
Theoretical Study of Temperature Distribution though Pasteurization for Orange Juice Based on 3D CFD Simulation
Authors: Xie Jing , Lin Yong Yan , Wang Jin Feng , Tang Yi , Chen Miao
Published: August 2013

Computational fluid dynamics is a blanch of hydromechanics which is used to analyze the properties and heat transfer for different flows. With the developments of the computer science and CFD software itself, CFD has been applied into every field in engineering which can save the cost and time of research. This article simulated three different temperatures (85°C, 88°C, 90°C) of pasteurization to orange juice and got the temperature field in each pasteurization temperature After compared with the experimental data, the simulation model was improved and optimal computational way was got finally.
Comparisons on the Estimation of Latent Trait between Fuzzy Regression and Traditional Regression
Authors: Lin Yuan Horng , Yih Jeng Ming
Published: August 2013

The purpose of this study is to compare the estimation on latent trait between fuzzy regression and traditional regression. It is assumed that manifest data from fuzzy linguistic questionnaire and traditional questionnaire is used to estimate the latent trait of task-taker. Two kinds of scoring from triangular fuzzy number is to represent the Likert scale. The factors of data simulation include type of fuzzy number, number of task-taker and number of item. The results show that fuzzy regression performs well than traditional regression. Based on the findings of this study, some suggestions and recommendations are discussed for future research.
Crown Drop Effects on the Needle Roller Bearing Life in Oscillatory
Authors: Chen Xiao Yang , Shen Xue Jin
Published: August 2013

In this paper, the effects of chamfer dimension at the Lundbergs profile needle roller end and the grinding undercut of raceway on the pressure distribution, which are used in the oscillatory applications, are discussed. The frame of numerical method for the crown drop evaluation considered these two effects is presented, which makes it possible to profile the needle rollers axially until the longitudinal pressure distribution is neither any edge effects nor high-pressure concentration at the center part of contacts. And the crown drop designed by this method is larger than that by Lundbergs theory. The comparison results of accelerated rolling contact fatigue experiment show that the width of grinding undercut and radius of the chamfer must be considered in determining the crown drop of the needle rollers.
Binarization Method Based on a Local Maximum-Ratio Threshold
Authors: Tai Jen Chao , Chen Bo Yi
Published: August 2013

For a vision-based analysis system, noise of the smear, the strain, or the badly illumination often causes serious errors in image analysis due to misclassification of object pixels and background pixels. An effective binarization method is thus required to improve the accuracy of segmentation and this paper proposes a novel algorithm for determining the threshold of each pixels. The proposed approach does not require statistical computation to determine the local threshold. The thresholding value can be easily determined by using the ratio of maximum intensity in a square region around each pixel. Experimental studies are conducted to evaluate the performance of the proposed method and the obtained results verify its segmentation abilities of hand-written text and music symbol under the badly illumination condition.
Simulation Research of the Particles’ Track in Cyclone Separator
Authors: Zhang Zhen Wei , Ji Xiang Lei , Kang Cheng Ming , Zhou Yong Sheng
Published: August 2013

This paper mainly focuses on the numerical simulation of particles trajectories aiming at obtaining the movement regulations of particles with different diameters. The article takes advantage of random orbital model of phase coupling under Lagrange coordinate, and figures out that the movement of small particles has large randomness, meanwhile particles with the same diameter and different initial positions can reach various final positions, some of which can escape or be captured from the exhaust pipe. Particles trajectory can be different even if it has same diameter and initial position. The conclusion of this thesis also puts forward that three different phenomena of presentation of gray ring, short-circuit of exhaust pipe and back-mixing of dust exhaust can appear under any conditions. Almost all large particles can be captured by the cyclone separator, and few particles show retention and short time rotation in the lower part of exhaust pipe.
Facile Fabrication of Bi2O3 Chaplet-Like Nanoparticles
Authors: Gao Yan Ping , Wu Zhi Fu
Published: August 2013

Bi2O3Chaplet-like Nanoparticles have been fabricated. Most of them have the average inner diameter of 200nm and the mean rim thickness of 20nm. Photoluminescence spectra of the nanorings at room temperature were investigated, which demonstrated that the rings present excellent optical properties. The influence of aging time on the morphology and structure of β-Bi2O3superstructures was also studied, indicating that the nanorings superstructures were transformed into nanoplates after a long aging time. The formation mechanism of the β-Bi2O3superstructures was also explored. This approach will be further extended to solvent-controlled fabrication of related minerals with novel complex superstructures.
Development of Electroless Ni-P-ZrO2 Nanocomposite Coatings by Codeposition of Mechanically Reduced ZrO2 Nanoparticles
Authors: Makkar Preeti , Agarwala R.C. , Agarwala Vijaya
Published: August 2013

In this study, an attempt has been made to develop electroless Ni-P-ZrO2nanocomposite coatings on mild steel substrate where the reinforced nanosized ZrO2particles were prepared by mechanical milling using high energy planetary ball mill. An alkaline bath was used with a suspension of ZrO2particles (4 g/L) for the synthesis of Ni-P-ZrO2composite coating. The surface morphology, size range and phase analysis of as-prepared ZrO2particles were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and the properties of the coatings such as hardness and wear (ball-on-disc) were investigated and compared with Ni-P deposits. The results showed that as-prepared ZrO2particles exhibit irregular shaped and size ranges from 14 to 17nm. After heat treatment (400°C,1h), the microhardness and wear resistance of the coatings are significantly improved. The Ni-P-ZrO2nanocomposite coatings exhibit enhanced wear resistance over NiP coating.
Tracking Frequency Resonant Coupling Energy Wireless Transmission Research
Authors: Xie Ying Hui
Published: August 2013

The problem of transceiver coil resonance frequency detuning is solved tentatively on resonant coupling energy wireless transmission in this paper. The circuit model of the wireless transmission system of the resonant coupling electrical energy is first studied, the relationship between the parameters of the system and the transmission efficiency of the various parts is analyzed, and yhe studies have shown that the change in the amount of the transmitting coil inductance greater impact on the transmission efficiency, while the receiving coil inductance change in the amount of efficiency small, and thus the proposed phase locked loop frequency tracking technology, to ensure that the transceiver coil resonant frequency to ensure that the transmission efficiency of the system. The feasibility of the design frequency tracking system is verified with the experimental results.
Soft Magnetic Material Testing Using Magnetic Resonance Imaging
Authors: Frollo Ivan , Andris Peter , Pribil Jiri , Dermek Tomas , Gogola Daniel
Published: August 2013

Soft magnetic field samples were placed into the homogenous magnetic field of an imager based on nuclear magnetic resonance. Several samples made of a soft magnetic material (cut from a data disc) were tested. Theoretical computations on a magnetic double layer were performed. For experimental verification an MRI 0.178 Testa ESAOTE Opera imager was used. For our experiments a homogeneous circular holder (reference medium) - a container filled with doped water - was designed. The resultant image corresponds to the magnetic field variations in the vicinity of the samples. For data detection classical gradient-echo and spin-echo imaging methods, susceptible to magnetic field inhomogeneities, were used. Experiments proved that the proposed method is perspective for soft magnetic material testing using magnetic resonance imaging methods (MRI).
Experimental Study on Light Intensity Profile in an Axisymmetric Thin Shell Irradiated by a Light
Authors: Ho Ching Yen , Ma C.
Published: August 2013

This paper experimentally investigates light intensity distribution in a paraboloid of thin shell irradiated by a laser. Light intensity distribution needs to be understood for solar energy heat receiver or laser drilling cavity. A novel method is utilized to measure the light intensity distribution in a paraboloid of thin shell irradiated by a laser. The results are explained by simple geometric optics.
Absorbability and Thermal Capacity of Towels
Authors: Ročková Kateřina , Rešetarová Lucie , Hes Luboš
Published: August 2013

Presented article deals with absorbability and thermal capacity measuring for few basic types of towels. Absorbability is the material ability to absorb water. That is especially for towels the most important property. The thermal capacity behaviour according to the increasing moisture degree was investigated by the Alambeta device. Thermal capacity is the parameter, which characterizes the thermal touch. A task of laboratory experiments was to determine how much water stayed on human body after an ordinary shower. Furthermore, it was obligatory to set chosen property characteristics by the Alambeta device and finally to set towels drying time.
Frost Heaving Soil Road Use Synthetic Adhesive Reinforcement Method
Authors: Bao Hao Zeng
Published: August 2013

In many areas, there are still a development road construction materials, traditionally, often use reinforced concrete, asphalt and other adhesive method to strengthen the low strength of rock and soil anti-freeze expansion coefficient; And now all countries in the world are studying how to use industrial production waste development of new composite materials. One of the most development potential, the production of industrial waste - slime. This paper USES the Russian kazan national construction university experimental methods, in the experiment to improve frost heaving soil physical and mechanical properties of the method for the synthesis of adhesive, based on the feasibility and applicability, environmental assessment of research and analysis, for the use of adhesive put forward a lot of reference value.
Research of Data Destruction System in Marine Environmental Monitoring Buoy
Authors: Zou Guo Liang , Ma Jing Jing
Published: August 2013

To solve the problem how to prevent the marine environment monitoring feature data from leaking when an emergency occurs, a destruction of data used in marine environment monitoring buoy system is researched. The architecture design of the system is introduced; a data overwrite algorithm based on the data secret level of the marine work is proposed; through data overwrite technology and the high-pressure circuit to achieve the safe destruction of data elements in marine environmental monitoring. The study shows the data destruction system can trigger data destruction procedures in real time, it can solve data security issues for marine environmental monitoring buoy in the out of control situation, and the destroyed data is unrecoverable, thus preventing data loss and leakage.
Structural Design of Giant Generator Excitation Rectifier Cabinet
Authors: Ji Ting Ting , Wang Hai Jun , Huo Qian Tao , Ding De Rao
Published: August 2013

A structural design scheme was proposed based on the requirements for giant generator excitation rectifier cabinet. It is described in detail from type selection, heat dissipation, to insulation and modular design. The operation in the Three Gorges Underground Power Station proved the success of the structural design.
Analysis of the White Circuit System of the NSRRC TLS Booster
Authors: Liu Chen Yao , Hsieh Yao Ching , Liu Kuo Bin , Huang Din Goa
Published: August 2013

At the Taiwan Light Source (TLS), the booster ring provides energy injection at repetition frequency 10 Hz with injection capability in the top-up mode. To obtain the wide acceleration energy range 50 -- 1.5 GeV, a 'White-circuit' topology has been chosen. The White circuit is, briefly, a biased resonant circuit in which the energy is transferred between the booster bending magnets and a large capacitor bank. The White circuit uses a resonance axiom to ramp the current of the bending magnets. The peak current is 2300 A; the bending magnets can accelerate the energy of the booster electron beam current from 50 MeV to 1.5 GeV with the White circuit system. We analyze the characteristic of the White circuit to get a circuit model. Using the circuit model to simulate impedance and phase are identical with the measurement data of the White circuit. The results are described in this paper.
Advancement in Correlation Study between Cell Apoptotic Stages and its Morphological Variations via Single-Cell Techniques
Authors: Chen Ken Yen , Wang Dau Chung , Tsai Cheng Hsien , Chen Chuan Hung , Chen Gen You
Published: August 2013

In recent years, the appreciation of cellular heterogeneity instead of cell information inferred from population-level data has driven the development of single-cell techniques. Among those adopted in this research were AFM characterization, fluorescence technique and a self-developed cell-targeting process in order to correlate precisely the cells early or late apoptotic stage with its corresponding morphology status, the membrane roughness in this paper. Research results were compared to results revealed from our previous research for the effectiveness verification of the proposed scheme.
Evaluation of Resilient Modulus Test Protocols for New Mexico Subgrade Soil
Authors: Rahman Md Tahmidur , Cabrera Anthony S. , Rafiqul A. Tarefder
Published: August 2013

Resilient modulus (MR) is a laboratory determined parameter of pavement subgrade soil which is an important design input for the Mechanistic Empirical Pavement Design Guide (MEPDG). There are two accepted laboratory testing protocols for determining MR, namely AASHTO T307 and NCHRP 1-28A. AASHTO method is more popular because of its simplicity in positioning the load and deformation transducers. This study is undertaken to examine the available test protocols for New Mexico subgrade soil by varying the location of deformation transducers and effects of sample size. AASHTO A-6 subgrade soils have been collected from the state of New Mexico, USA. Specimens of 2.8 inch and 4 inch diameters are reconstituted using modified proctor compaction.Resilient modulus values aredetermined using external and internal deformation techniques. Comparative analyses are performed and amount of extraneous large deformation (lower MR) measured by the AASHTO recommended external deformation transducers is measured.In addition, appropriate internal deformation measurement methods are recommended to obtain most consistent MR values. 2.8 inch and 4 inch diameter sample generate almost similar MR values.
Microstructural Characteristics of Polyurea and Polyurethanexerogels for Concrete Confinement with FRP System
Authors: Fakharifar Mostafa , Lin Zhi Bin , Wu Cheng Lin , Mahadik-Khanolkar Shruti , Leventis Nicholas , Chen Gen Da
Published: August 2013

Due to their exceptional mechanical properties,xerogels attract increasing attention forstructural applications. In this study, the mechanical behavior of two types of polymeric xerogelsis investigated. The excellent energy-absorbing capability of those xerogelsis demonstrated by their stress-strain relations with respect to their microstructure determined withscanning electron microscopy (SEM). A pilot study on the effects of xerogellayers in an FRP system for concrete confinementis conducted.Test results clearly indicatedthat the proposed multi-layer systemcan significantly increase the ductility of confined concrete.
Numerical Simulation of Bending Performance of Laser-Welded I-Core Sandwich Plates Considering Weld Material Properties
Authors: Sun Yu Ping , Zhou Wei Li , Li Hui , Li Jin Mei
Published: August 2013

The properties of the base metal, weld and joint of CCS-B material for sandwich plate used in ship structurewasconfirmedthrough the tensile test,which provided the data parameters for the finite element simulation;The three points bending test for laser-weldedI-coresandwich plate was simulated by ABAQUS,and two kinds of models were establishedby considering and without considering weld material properties, which load-displacement curve shows that the influence of the weld material properties is larger to plates stiffness, but less to bearing capacity; For the model whichwas considered the weld material property, the development of plastic zone and the measurement of stress state show:In the elastic stage, the localposition yield in the junction zone between the web and upper and lower weld; In the plastic stage,the large areayield in the panel and the web of T-joint zone; The mapping relationship from the stress state to macroscopic deformation shows that both of the panel and the web occur S shape deformation and the whole web plate occur inclination deformation.
Comparative Assessment of Urban Drainage Systems in Different Cities Based on Substance Flow Analysis
Authors: Bai Hua , Zeng Si Yu , Dong Xin , Chen Ji Ning
Published: August 2013

In this paper the substance flow analysis (SFA) method was employed to map the water, COD-C, TN-N flows in urban drainage system, focusing on the pathways of contaminants to urban water environment. As case studies, four cities were selected for the comparative assessments using the statistical data of 2011.Through examining the fluxes of three sources (effluent of WWTPs, wastewater discharged without treatment, and urban storm runoff) of COD-C and TN-N emission, analysis and discussionwere made based on different units of measurements.The results showed that the load of COD-C was in the range of 16.50~80.25 kg/y/capand 131.44~227.58 t/y/km2, and TN-Nwas in the range of 1.20~5.43 kg/y/capand 9.57~23.18 t/y/km2.Taking considerations ofproportional relationship among the three origins, urban storm runoff released the majority of COD-C to receiving water, accounting more than 60% of the total. For TN-N flows, effluent of WWTPs and urban storm runoff wereidentified as the major contributors, accumulated contribution of 85%.Thus, the outcomes from these substance flow analyses, suggested that a reduction in pollution could be achieved by improvingstormwater management and upgrading emission standard of WWTPs, and proved itself as an effective tool for urban wastewater management as well.
Effect on Compressive Strength of Paste/Mortar/Concrete by Changing Bottom Ash Content and Activator pH
Authors: Lee Woo Keun , Lee Ji Hyeon
Published: August 2013

Geopolymer is a recently developed inorganic material that can be used to produce cement. In addition to being fire and chemical resistant, geopolymer possesses excellent mechanical properties. Geopolymeric materials are synthesized by alkaline activators such as an alumino-silicate source, which forms a gel binder phase. Toxic contaminants are also immobilized in this process. In this study, inorganic paste, different contents of MBA, and several types of activators are investigated to obtain the optimum condition. In addition, the crystalloid and crystal structure of geopolymer was analyzed by XRD and FTIR. The Korea Standard Leaching Test (KSLT) was also used to evaluate the environmental safety of inorganic paste.
This study showed that the compressive strength of the WG activator is approximately twice as great as the NaOH and KOH activators. At pH 13, the WG activator also showed the best pH of the activators. In addition, the compressive strength of geopolymer concrete showed about 30 MPa in this condition. Finally, it was confirmed that all harmful heavy metals in MSWI ash were stabilized.
Research and Development on Membrane Technology in Natural Gas Desulfurization
Authors: Wang Shu Li , Wang Jian , Li En Tian , Ma Lu
Published: August 2013

Membrane separation is a new technology which deals with natural gas, as the gas desulfurization is a basic unit for ensuring the normal transportation and utilization. On the basis of membrane separation principles, the character of gas desulfurization with membrane is analysised, different materials and its corresponding technology are introduced. While the combination of membrane separation and membrane absorption is the developing trend of natural gas desulfurization.
Enhanced Adsorption of Toxic Compounds from Cigarette Mainstream Smoke by the Al-Ca-SiO2 Composite Material
Authors: He Liang , Zhang Wei , Wang Ming Feng , Yuan Fa Gui , Zhang Jin Ping , Duan Yan Qing , Ren Bei Bei , Wang Jia Qiang
Published: August 2013

There are a lot of harmful components which is carcinogens in cigarette mainstream smoke, especially the ammonia, phenol and crotonaldehyde. The adsorption of ammonia on Al-Ca-SiO2 composite material was carried out in a batch home-made slurry-type reactor system. And the material was characterized by N2 adsorption-desorption and FT-IR. The results examined by Hongyun Honghe Tobacco (Group) Co. Ltd. reported that the Al-Ca-SiO2 has a high effect on the adsorption of ammonia (16.8%), phenol (10.3%) and crotonaldehyde (11.2%).
Regulation of the Absorption of Cu with Various of Pollutants in Sediment through Fractional Factorial Design
Authors: Li Yu , Meng Chong , Wang Meng , Cheng Bing Chuan , Zhou Chang Zhi
Published: August 2013

The resolution IV fractional factorial design was used to study the adsorption regularity of Cu coexisted with various pollutions (Zn, Pb, Cd, Ni, atrazine, malathine, et al.) onto the sediment. The study found that the main effect and the second-order interaction effect of ten pollutions concentration had significant influence on the adsorption of Cu on the sediment. The concentration of Cu was the critical factor to the promotion of the absorption capacity of Cu in sediment, the second-order effect played the critical role in restraining the absorption of Cu. The main effect of Cd, and the second-order interaction effect include Cd, had greatly inhibited the absorption of Cu in sediment, and the contribution was over 30%, which meant there was prominent antagonism between Cu and Cd. Fractional factorial design can provide a theoretical basis for the reveal of the adsorption mechanism between the different contaminants in the water environment pollution.
The Research on Ultimate Displacement Angle of Concrete Columns with High-Strength Materials
Authors: Fu Guo
Published: August 2013

Not collapse under strong earthquake is an important goal of the seismic design of reinforced concrete structure, seismic collapse resistance performance is directly affected by the deformation behavior of reinforced concrete column. The application of high-strength steel, high-strength stirrup and high-strength concrete can enhance the concrete material properties and mechanical properties of reinforced concrete column, but their deformation behavior have large differences. The research on the seismic performance of columns with high-strength materials, especially its deformation behavior, become the most important issue of anti-collapse analysis. In this paper, the ultimate displacement angle of concrete columns with high-strength materials were collected, the ultimate displacement angle and inter-story drift angle 1/50 were compared and analyzed. The results show that the average of ultimate displacement angle of the reinforced concrete column with high-strength stirrup and high-strength longitudinal bars are 0.0469, 0.0312, respectively, greater than inter-story drift angle 1/50, while the average of ultimate displacement angle with high-strength concrete and high-strength core concrete are 0.0147, 0.0167, less than 1/50, therefore, it is not suitable for taking 1/50 as the critical value of structure collapse with high-strength concrete. The inter-story drift angle should be different in the anti-collapse analysis.
Experimental Study on Expansion Characteristics, Frost Heaving Characteristics of EPS Beads Improved Expansive Soils
Authors: Xu Li Li , Qu Xiang Min , Liu Li Jia
Published: August 2013

Proposed EPS beads for the improvement of expansive soil in cold regions. Based on laboratory soil test study the feasibility and mechanism of the EPS beads improving expansive soils. Through four sets of comparative test with different contents of the EPS beads, the result indicates: The expansion rate of the soil, frost heave amount decreases with the increase in EPS beads content, EPS beads can effectively inhibit the expansion of expansive soil and frost heaving, proposed the optimal dosage.
Study on Seismic Behavior of Joints Composed of Engineering Material of Concrete Filled Steel Tube
Authors: Zhang Xu Wei , Shi Qi Yin
Published: August 2013

Two different kinds of steel-encased concrete composite beam connected concrete filled low-cycle reversed loading. The test results indicate that the two joints both have higher bearing capacity, better ductility performance and seismic behavior. In order to theoretically analyze the joints force mechanism, the nonlinear finite element analysis (FEM) of the above two joints has been conducted by using the ANSYS program. According to the results of FEM, the hysteretic curves and the skeleton curves are deduced. And from the contrast between the test results and the finite element results on energy dissipation capacity and ductility, it indicates that the theoretical results and the experimental results are basically coincident. But the errors of them are occurred due to the difference of material constitutive model. The precision of the nonlinear finite element analysis of reinforced concrete is depending on the constitutive relation of concrete to a large extent.
Study on Hydrogeological Investigation and Water Preventing and Draining Technology of Zhongtiaoshan Tunnel
Authors: Xue Xiao Hui , Su Zhong Ming , Song Fei
Published: August 2013

t is discussed that using the method of composite hydrogeological investigation to survey the conditions of the zhong tiaoshan tunnels hydrogeological. On this basis, we use the groundwater dynamics to forecast the water gushed yield, and put forward two structure types of water preventing and draining, then verify the reasonableness by the construction practice. The conclusion has some significance for the design and construction of the similar tunnel projects water-proofing and drainage structure.
Research on Construction Materials with the Elderly Residence Planning and Design Based on Home Care of the Elderly
Authors: Li Jiao
Published: August 2013

From the perspectives of construction materials and spatial planning, this paper presented the problems in the elderly residence nowadays, analyzed the features and development trend of family pension mode. Through the thinking and innovation of new construction materials, it is the foundation for the sustainable renovation of old buildings and endowment patterns of elder buildings that occupy the home design.
Study on the Architecture Materials Design of Art and Clothing Materials Design
Authors: Ma Li
Published: August 2013

The building is enclosed the spatial structure of the human lifestyle, and clothing is the "packaging" of the people, with modesty naked. The building on the space recorded the development and progress of human society, and the clothing reflects the development of human civilization. In this paper, the use of color, body composition and materials of the three aspects of clothing and architecture are discussed similarities and similarities in terms of design, In addition, from the official architectural culture and clothing culture, literati building materials culture and clothing culture and folk building materials culture and clothing materials culture demonstrates the culture intrinsic link between architectural culture clothing culture of mutual learning and mutual influence. To further illustrate the architecture and clothing appears to be two different professional, but in terms of design and culture, between each other is a profound inner link, Both organically combined, will be able to better develop the architectural design and fashion design.
A Novel Approach for MEMS Vacuum Packaging
Authors: Wang Cheng Gang , Gan Zhi Yin , Wang Xue Fang , Lin Dong , Liu Sheng , Zhang Hong Hai
Published: August 2013

MEMS vacuum packaging now is the impediment of the MEMS appliance in some specified fields. The major problem of current packaging approach is that the packaging process can not match the requirement of the ultra low leak. But the process now can not be improved with the existing technology. In this situation, authors proposed a novel approach for MEMS vacuum packaging, which can remarkably lower the leak rate. This paper analyzed the vacuum maintaining time of the vacuum packaging and compared the current design and new packaging method.
Theoretical and Finite Element Analysis on Connecting Rod of Quintuple Cylinders Fracturing Pump
Authors: Ma Xiu Hua
Published: August 2013

According to the plunger pump movement principle, this paper analyzed the two kind of typical force situation of the connecting rod, and obtained the theoretical maximum value of the force. The finite element analysis method was applied to analyze the structure strength of the connecting rod. The finite element model of the connecting rod was established, and the load handling and boundary condition was analyzed. The maximum stress 405MPa occurs at the transition from the small end to the link body. The average stress of the link body is 136MPa. The maximum displacement is 0.17mm, belongs to the small deformation range. The last results of the node stress and displacement show that the connecting rod can work safely.
Research on NOx Emission Characteristics of Medium Speed Diesel Engine
Authors: Liu Zhong Min , Yan Jin Long , Li Jian Feng
Published: August 2013

In order to research the NOx emission characteristics of the medium speed diesel engine DN8340, a finite element model is built. Calculate the influence of changing the intake charge temperature and injection timing on NOx emission, and forecast how it works to decrease the intake charge temperature and delay injection timing by the methods of Miller-cycle, oscillating cooling piston and electronic controlled high pressure common rail. The calculation result shows that Decreasing the intake charge temperature and delaying the injection timing can reduce the NOx emission to 2.22g/kWh effectively which meets the requirement of IMO TierIII.
Concept Exploration on the Design Requirements and Design Scheme of Laser Shock Processing Equipment
Authors: Deng Hua Bo , Zou Chao , Liu Wei Jun
Published: August 2013

In order to development the laser shock processing equipment, the technical features and process demand are analysis. The design requirements about laser shock processing equipment are discussed in detail by the methods of use case analysis and sequence diagram. Functional framework and technology architecture are put forward for the development of laser shock processing equipment. Finally, the equipment structure concept is given which is described for the future equipment design.
Electro-Mechanical Coupled Characteristics of Piezostack Actuator under the Combined Loads
Authors: Xue Ping
Published: August 2013

In the present paper, a finite element model is developed to investigate the static analysis of the piezostack with two hundred layers, in which the polarization directions are opposite between two adjacent layers in axial one. The distributions of the stress and voltage are simultaneously taken into account under both the constant electric and mechanical loads. The results show that the maximum Von Mises stress locates in the corner of the structure near the constrained surface, and the maximum electric field strength locates over the end of the internal electrode that has zero potential. In addition the effect of strip electrodes is considered for the above computation, the numerical simulation indicates that its influence is insignificant and can be ignored in practice analysis.
Influence of Ag Micro-Addition on the Glass Forming Ability, Thermal Stability and Compression Performance of Cu-Based Metallic Glasses
Authors: Zhang Ling , Luo De Chun , Chang Wen Chun , Xu Xiu Zhi
Published: August 2013

The alloy rods with diameters of 3.0 mm of Cu50-xZr42Al8Agx(x=0,2,3,4)were prepared by means suspend melting-copper mold suction casting. The structure and thermal stability of the alloys were analyzed by X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. Subsequently, compression performance and fracture morphology of these bulk metallic glasses were investigated .we focus on analysis that influence of Ag micro-addition on the deformation and fracture of speciments. The results showed that the addition of Ag can enhance the forming ability and thermal stability of amorphous alloys. At the same time, with the increase of Ag content, the breaking strength of samples was improved from 1747Mpa to 2038Mpa. Without obvious plastic elongation percentage in bulk metallic owing to non-homogeneous modes of texturing at room-temperature. The compression failure behavior of test samples belong to elastic failure and the maximum failure extensibility is 3.7%.The fracture pattern of test samples all assume venation pattern.
Ferromagnetism Switched by Hydrogenation in Layered MoS2
Authors: Kan Er Jun , Li Ming
Published: August 2013

Ordered spin structure in two-dimensional materials is critical to the use of such materials in spintronics. Here, based on first-principles calculations, we demonstrated the existence of magnetic homogeneity in integrated two-dimensional structures. Our calculations show that hydrogenated MoS2 can be magnetized with a ferromagnetic character. The doped electrons in 4d orbitals of Mo atoms through hydrogenation lead to strong exchange splitting, which is the mechanism behind the transition of magnetic states. Given the recent progress in chemical control of two-dimensional materials, our results open a new way to produce two-dimensional spintronics.
Synthesis of New Luminescent Materials and Application as Sensitive Chemosensors
Authors: Wang Jing , Qiu Xiao Yang , Liu Lan Tao
Published: August 2013

Two new tetraphenylethene derivatives were designed and synthesized through Suzuki coupling reaction. The absorption, fluorescence properties, and application were studied. All compounds showed similar absorption pattern in pure THF, but exhibited significant red shifts with increasing the number of thienyl rings, indicating an extended π-electron delocalization from the TPE nucleus, brought about by the thienyl substituents. The new materials exhibit the novel feature of aggregation-induced emission, as a result of the twisted TPE units, which restrict the intramolecular rotation and reduce the ππ stacking. Photoluminescence of these chromophores ranges from 400 to 700 nm. The new materials can detect the volatile organic compounds with relatively high sensitivity in the aggregate state, which indicates the new materials can work as sensitive chemosensors.
Microstructure and Hot Corrosion Properties of Surface Plasma Alloyed Ti2AlNb-Based Alloys
Authors: Hang Ye Chao , Wu Hong Yan , Li Shi Juan
Published: August 2013

Some unsatisfactory characteristics of Ti2AlNb-based alloys restrict its practical application, such as the insufficient high temperature oxidation, corrosion resistance and poor wear resistance. The double glow plasma surface chromizing can improve their wear resistance, however the hot corrosion properties of surface plasma chromised Ti2AlNb-based alloys were little investigated. The microstructure, composition and surface hot corrosion morphologies of Ti2AlNb-based alloy were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD of alloying layer indicated that the Cr-Nb alloy phase was the main composition, including the compact and uniform Cr2Nb phase, which was benefit to improve the hot corrosion properties of alloy.
The Simulation of Vibration Mechanism and Dynamics Analysis of Eccentric Shaft of Billet Caster
Authors: Shi Jia Lian , Meng Gui Yun , Ma Xiao Gang , Ma Da Dong
Published: August 2013

The model of vibration mechanism is built with Pro/E software. Simulate the vibration mechanism and obtain the cosine curve of the vibration table in the vertical direction by Pro/E. Afterwards, perform transient dynamics analysis of eccentric shaft in the vibration mechanism, and get the maximum average stress and the dangerous section. The simulation is correct and the dynamics analysis is accurate, which lays the foundation for the analysis, design and manufacture.
Design and Application for Heller System Radiator Built-In Automatic Cleaning Device
Authors: Liu Feng , Zhao Qun , Ma Hong Fa
Published: August 2013

Due to working in natural environment in a long term and dust deposited on the surface, air cooling radiator turns to a lower heat transfer rate, so that it leads to load limit operation for air cooling unit in summer. In allusion to indirect air cooling radiator with Heller System, high-pressure water jet technique is used and built-in cleaning device is designed to entirely solve above-mentioned problem. Cleaning device works automatically and realizes full cover cleaning. Cleaning-pressure is between 100 and 150bar and cleaning target distance keeps within 200mm. Dust on the surface of radiator can be entirely cleaned. Cleaning flow is 20m3 /h and the cleaning cost decreases greatly. Such device has been successfully tested and worked. Furthermore, it has been applied to the project with a system of 2×600MW supercritical indirect air cooling unit.
Long Range Inspection of Rail-Break Using Ultrasonic Guided Wave Excited by Pulse String
Authors: Zhang Kun , Han Zan Dong , Yuan Ke Yi
Published: August 2013

Compared with single pulse excitation mode, ultrasonic guided wave excited by pulse string is more suitable for long range inspection of rail-break. Shear horizontal (SH) guided wave transducers with modified structure and pulse string emission circuit were designed for the purpose of achieving longer inspection distance. To solve the control difficulty of pulse string, the pulse string phase shift superposition (PSPSS) theorem was proposed and exhaustive algorithm together with genetic-like algorithm were also given to calculate the optimal phase shift parameters. Experiments of pulse string guided wave on rail were carried out. Result shows that the PSPSS theorem can improve wave energy significantly, and the maximum propagation distance of pulse string guided wave can be enhanced up to more than 600 meters.
Study on Active Vibration Control
Authors: Xing Feng , Cao Jian Guo , Wang Jing , Deng Chang Yong
Published: August 2013

This paper analyses the active vibration control technology on the piezoelectric ceramics car-body pieces in fuzzy control Strategy. Adaptive controllers, based on fuzzy logics, are synthesized for the control of vibration of body structure. Piezoelectric element, control system and body structure have been combined to be a intelligent response system to external drive and it’s own vibration. This system can effect reducing body structure’s reaction from environmental load with external energy. The availability of the control strategy has been confirmed by experiments.
Speed Measuring Experiment System Based on LabVIEW
Authors: Shao Zhan Shuai , Min Huang
Published: August 2013

Based on the labVIEW platform, speed measuring system is constructed by using data acquisition card for photoelectric coder. Both method M and T are showed by labVIEW. At the same time, this paper introduces the construction and principle and the implementation of the program of the whole system. The whole system is expanded around data acquisition card, motor driver uses data acquisition card to transmit pulse to drive motor. At the same time, the signal of photoelectric coder converted by transition circuit is received by the different ports of data acquisition card. In terms of hardware, data acquisition card is the core of the system; In terms of software, motor driver, the program of method M and method T are main modules of whole program. The program adopts modular thought to design, and system uses a master module to coordinate the various modules to achieve the desired effect.Keywords: labVIEW; photoelectric coder; speed measuring; data acquisition card.
Adaptive Algorithm Designed for Enterprise's Agile-Transformation
Authors: Su Jin Long
Published: August 2013

The enterprise informatization management and its technologies can input the vigor into Enterprises transformation, and help to increase its ability for the good return, can promote the level of technology and management of traditional manufacturing enterprise from a labor intensive industry, and can move it toward the accurate management. The Agile-Transformation strategy platform is designed as Integrated Infrastructure for Agile Enterprise (IIAE) by our research team. In this paper, we discuss some of the details of adaptive algorithm designed for Enterprises Agile-Transformation including IIAE and relationship of its Main Functions, Fuzzy Neural Network and Its IIAE Application, Cooperative Games for Interval Inventory Decision Support in IIAE. All technical details touched upon obtained satisfying performance in practically.
Modeling and Simulation of Chinese SONG Telescope
Authors: Gao Liang , Wang Guo Min
Published: August 2013

Telescope structure is used to support and position the optical mirrors in the right place during the period of telescope observation, so it will have such capability to withstand a certain load. In order to ensure SONG telescope has such capability, FEM analysis and calculation are finished in this paper. With the help of ANSYS, firstly the finite element model of SONG telescope is built. Then using this model, the analysis and calculation of static and dynamic are performed, including the deformation under the gravity load with the tube in different directions, eigenfrequency calculation of the whole system and the responses under the seismic acceleration spectra. The results show that the max. offsets and max. relative tilt angles between primary mirror and secondary mirror are very little under the gravity load. The first natural frequency is 20.083Hz, larger than the design requirement 8Hz. The results of seismic load analysis show that the deformation in the telescope structure is 0.42mm and the stress is 33.8MPa, less than the allowable stress of the structure material. The above analyses verified that the structure design of SONG telescope is reliable and acceptable.
Ultrasound Effect on Swelling Properties and Drug Release Behaviors of Spray-Dried Tapioca Starch Tablets
Authors: Manchun Somkamon , Limmatvapirat Sontaya , Sriamornsak Pornsak
Published: August 2013

Modified starches have been widely used as an excipient in matrix tablets to control drug release. A new processing method for the production of modified starch, high power ultrasonic treatment (400 W), was applied to native tapioca starch. The spray drying technique was used after modification (i.e., by ultrasonic or heat treatment). Matrix tablets were then prepared by direct compression using theophylline as a model drug. The effect of starch modification on swelling, erosion and in vitro drug release behaviors of compressed matrices was investigated in 0.1 N HCl or phosphate buffer (pH 6.8). The matrix tablets of modified tapioca starch formed a continuous gel layer while in contact with the aqueous medium undergoing a combination of swelling and erosion. The ultrasound-treated starch swelled and eroded less than the native starch and heat-treated starch, thus the drug release from matrix tablets using ultrasound-treated starch was slower. For these results, it can be concluded that the ultrasound-treated starch was a promising excipient for controlled drug release.