bluuebunny/crossref_metadata_2025 huggingface dataset:
Research Development and Application of Green Cutting Technology
Authors: Liu Yang , Li Xiao Jing , Qu Pei Xin
Published: March 2012

The development of green cutting technology could brought higher finished quality and lower energy consumption. Therefore, the research of green cutting technology has received much attention from researchers. According to constitution of cutting process, green cutting technology is divided into dry cutting technology, trace lubrication cutting technology, low temperature cold wind cutting technology and gas jet cutting technology. The author summarized the typical characteristics of four main cutting technologies and respectively discussed them. Finally, the author has given a detailed demonstration of the application of green cutting technology.
Nonlinear Seismic Response Analysis of Concrete Perforated Brick Masonry Building
Authors: Yang Wei Jun , Duan Ming Sheng , Yin Ming Juan
Published: March 2012

In order to grasp the seismic performance of the concrete perforated brick masonry building, nonlinear dynamic analysis is used for seismic response analysis of multi-storey building. In the degradation of trainer restoring force model,it is proposed that the yield moment of the inflection point is calculated by linear interpolation, the unloading time of inflection point is calculated by the precise non-iterative, which approach to improve the accuracy and efficiency of nonlinear analysis. Example shows: concrete perforated brick masonry structure in the 7-degree multi-zone can be widely used.
Transportation of Droplets within Two Substrates by Help of Surface Acoustic Wave
Authors: Zhang An Liang , Zha Yan
Published: March 2012

It is usually difficult to integrate all operation units of complicated biochemical analysis systems into a micro-fluidic substrate. A multi substrate micro-fluidic system (MSMS) is a good option, in which operation units can be integrated into two or more substrates. Thus, it is necessary to transport droplets between two substrates. In this paper, a new method for transporting droplets between two substrates has been proposed based on surface acoustic wave (SAW). It is composed of a 128°YX-LiNbO3 piezoelectric substrate (substrate 1) and an arc-shaped polymer. The arc-shaped polymer is seamlessly adhered to the piezoelectric substrate, and the lowest end is above another a substrate (substrate 2) with some distances. After a droplet in the substrate 1 is propelled to the arc-shaped polymer by SAW, it will slide off the polymer due to its gravity, and transported onto the substrate 2. Theoretical formulas of forces acted on the droplet have been deduced and the condition of the droplet sliding off the arc-shaped has also been obtained. Red dye solution droplets were used in the transporting experiments. Results show that the transportation of droplets is decided on curvature radius and hydrophobic property of the arc-shaped polymer and the droplet volumes. As applications, mixture operations have been implemented in substrate 2 after droplets have been transported from the substrate 1.
Influences of Heat Treatment on Spinning Process with Large Thinning Rate and Performance of 30CrMnSiA
Authors: Han Dong , Yang He , Zhan Mei , Yang Ming Yang , Mou Shao Zheng , Li Tian
Published: March 2012

In order to improve the limits of wall thickness reduction of 30CrMnSiA steel in process of spinning, realize multi-pass continuous spinning process, and furthermore improve the forming efficiency and shape accuracy of thin-walled shell of 30CrMnSiA steel in spinning process, the influence of traditional annealing and austenization plus spheroidal annealing on the structure performance of 30CrMnSiA steel and the spun performance of 30CrMnSiA steel are studied. Process parameters of traditional anneal and austenize plus spheroidal annealing are optimized to obtain higher plastic performance and lower ratio of yield strength to tensile strength. Spinning experiments of the workpieces that have been heattreated by the optimized traditional annealing process and austenization plus spheroidal process are completed. The result shows that the optimized austenization plus spheroidal annealing is beneficial to achieve a large thinning rate for flow spinning process, and can meet the demands of low cost and high efficiency of batch production.
Treatment of Dye Wastewater by Nano-Ferrous Modified Bentonite Assisted Advanced Oxidation Processes
Authors: Zhang Min Dong , Wei Yan Fei , Huang Mei
Published: March 2012

Degradation of dye wastewater was studied by using nanoferrous modified bentonite as the heterogeneous catalyst for a Fenton-like oxidation. By comparing the effect of homogeneous Fenton reactions as well as heterogeneous Fenton-like process for nanomodified bentonite, it is found that the advanced oxidation processes assisted by nanoferrous/bentonite complexes exhibit the stronger degradation capacity. And the removal rate of Fenton-like reaction increased from 23.6% to 75.5% when the ferrous concentration increasing from 20 to 100mmol/L. Being compared with homogeneous Fenton reactions, 20% increased degradation efficiencies is obtained by Fenton-like oxidation process for nanomodified bentonite under 6g nanoferrous/bentonite complexes in 100mL dye wastewater.
Study of Alloys Addition to the Electrodeposited Nanocrystalline Cobalt
Authors: Hyie Koay Mei , Resali Nor Azrina , Abdullah Wan Normimi Roslini
Published: March 2012

Cobalt and its alloy have been identified as potential candidates for replacing hexavalent Chromium plating in corrosion resistant coating in acidic environment. In this study, the effect of alloys addition towards elemental composition, crystallographic structure characterization, surface morphology, hardness and potentiodynamic polarization of the cobalt alloys coatings is reported. Addition of Nickel (Ni) and Iron (Fe) to the Cobalt (Co) coatings are deposited on stainless steel substrate by electrodeposition method. The deposition is performed at acidic environment of pH 3. The granule sizes of cobalt alloys prepared by electrodepositionmethod are in the range of 34.95 nm72.08 nm. The microhardness of CoNiFe is the highest (267.8 HV) compared to Co and CoFe. CoNiFeperforms the smallest corrosion rate with 1.322 mmpy. It is found thatthe addition of Ni and Fe into pure cobaltimproves the hardness and corrosion behavior.
Synthesis of Nanocrystalline FeVO4 and Its Visible-Light Photocatalytic Activity
Authors: Tong Yi , Tang Pei Song
Published: March 2012

The FeVO4 nanoparticles were synthesized by a precipitation process. The FeVO4 nanoparticles were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis diffuse reflectance spectroscopy (DRS). It was found that the prepared FeVO4 nanoparticles show an average grain size of 50-80 nm in diameter, and strong visible-light absorption with absorption onset of 515 nm, indicating a narrow optical band gap of 2.4 eV. Consequently, the FeVO4 nanoparticles show high visible-light photocatalytic activity for decomposition of methyl orange.
The Elastic Modulus of Nanometer-Sized Tungsten Layers and Wires
Authors: Lu H.M. , Han Yuan Yuan , Meng Xiang Kang
Published: March 2012

The size-dependent elastic modulus of tungsten layers and wires is predicted according to size-dependent melting temperature model. The elastic modulus decreases with decreasing of size and the drop becomes dramatically once the size decreases below 3 and 6 nm for layers and wires, respectively. Moreover, the softening of elastic modulus for wires is nearly twice as large as that for layers when size remains the same. The accuracy of the model is verified by experimental and atomistic simulations results.
Photodecomposition of H2S to H2 over Cu2+ Doped Cd0.3In2S4-Zn0.7In2S4 Composite Photocatalysts
Authors: Bai Xue Feng , Shan Wen Yan
Published: March 2012

The Cd0.3In2S4-Zn0.7In2S4 composite photocatalyst doped with transition metal Cu2+ has been synthesized by hydrothermal method. The physical and photophysical properties of the above-prepared photocatalysts were characterized by XRD, UV-Vis, SPS, SEM and XPS. The XRD peaks of Cu2+ doped Cd0.3In2S4-Zn0.7In2S4 were almost the same as the crystal structure of Cd0.3In2S4-Zn0.7In2S4. The UV-Vis absorption edge of Cu2+ doped Cd0.3In2S4-Zn0.7In2S4 shifted monotonically to long wavelength. The photocatalytic activity of Cu2+ doped photocatalysts had been improved as a result of the enhancement of the charge separation efficiency. The results indicated that the photocatalyst of Cu2+(2wt %)-Cd0.3In2S4/Zn0.7In2S4 exhibited the highest photocatalytic activity with the rate of H2 evolution to be 1141 μmol/(h·g) under visible light irradiation.
Numerical Modeling of Earth Structures: Frictional Anchors in Sand
Authors: Hu Wen Chi , Hsu Shih Tsung
Published: March 2012

This research performed a series of triaxial tests on sandy specimens to obtain the parameters needed for a constitutive model. The model is capable to simulate the strain hardening/softening and the volumetric dilation of sandy soil during stressing. The model and the related parameters were then employed in the commercial software FLAC2D to analyze the uplift behavior of various frictional anchors in sandy soil. Analysis results indicate that the friction stress along the fixed end of the anchor with a long fixed length exhibits progressive yielding under not only for a tension but also for a compression anchor. The progressive yielding behavior could be eliminated using a compound anchor because of the upward and downward transfer of load within the anchor shaft from the anchorage body. Therefore, a compound anchor can generate a higher anchorage capacity of all frictional anchors.
A ZnO Driven Silicon Cantilever for Nanoscale Actuation
Authors: Yuan Yan Hui , Du He Jun , Wang Pei Hong
Published: March 2012

A micro silicon cantilever actuated by ZnO thin film was designed, fabricated and characterized. The ZnO thin film was deposited by RF sputtering at room temperature. The transverse piezoelectric constant d31 was found to be-4.66 pC/N. Time and frequency responses of the cantilever actuator were investigated by means of a laser Doppler vibrometer. The actuator has a sensitivity of 12 nm/V at 15 kHz. Its 1st bending resonance was observed at 53 kHz. The bandwidth was found to be 27 kHz with damping of 0.35%. The cantilever demonstrated capability of high frequency actuation on a nanometer level.
Effect of Injection Molding Process on Electrical Conductivity and Mechanical Property of Nanoparticle Filled Polymer Composites
Authors: Zou Jing Chao , Jiang Ai Yun , Zhang Bao Feng , Wu Hai Hong , Zhou Ya Jun
Published: March 2012

Authors investigated the relationship among processing parameters, microstructures, electrical conductivity and mechanical property of injection molded nanoparticle filled polymer composites at present study. Standard tensile specimens were injected under different injecting pressures and packing pressures. The molded specimens were removing five layers from the surface to observe the microstructures at different positions of the moldings. The electrical properties were measured with a two-terminal standard resistor under DC condition at room temperature, and the mechanical properties of the moldings were measured by INSTRON 5580 Universal testing machine. The results showed that filled nanoparticles may form the best conductive path under the higher packing pressure matched with higher injection pressure. The mechanical properties of the molding depend on not only the concentration of the nanofiller, but processing conditions as well.
Microstructure and Optical Properties of ZnO-Doped CeO2 Thin Films Using Sol-Gel Method
Authors: Lai Chun Hung , Tseng Ching Fang , Hsu Wen Yu
Published: March 2012

This paper describes microstructure and optical characteristics of ZnO-doped CeO2thin films were deposited by sol-gel method with various preheating and annealing temperatures. Particular attention will be paid to the effects of an annealing treatment in air ambient on the physical properties. The deposited films were characterized using X-ray diffraction. The surface morphologies of annealed film were examined by scanning electron microscopy. Optical properties of the ZnO-doped CeO2thin films were obtained by UV-visible recording spectrophotometer. The dependence of the optical properties and microstructure characteristics on thermal treatment was also investigated.
Effect of Nano Biphasic Calcium Phosphate Bioceramics on Periodontal Regeneration in the Treatment of Alveolar Defects
Authors: Wang Lan Lei , Li Ji Hua , Xie Yong Tao , Yang Pi Shan , Liao Yun Mao , Guo Gong Ling
Published: March 2012

The aim of the present study is to investigate the efficacy of nanobiphasic calcium phosphate (nanoBCP) bioceramic in the treatment of periodontal osseous defects. Alveolar bone defects were surgically created bilaterally at the buccal aspects of four second premolars in two beagle dogs. After root leveling, nanoBCP was randomly filled in one defect and nothing was put into the contralateral defect as negative controls. Bioglass was randomly filled in one of left defect as positive controls and nothing was put into the contralateral defect as negative controls. Dogs were killed at the 12th week. Histological observations were processed through a light microscopy. The results reveal that a great amount of functional periodontal fissures formed in the defects in the nanoBCP groups and bioglass groups while no new bone formed in the control groups at all. In this study, nanoBCP has proven to work well as a biocompatible and bioactive material to promote periodontal regeneration effectively.
Spectrometric Radiation Measurements of Nanoporous Insulation Materials
Authors: Fan Xu Ji
Published: March 2012

For the measurement of radiation heat transfer in the low-density nanoporous insulation material at extreme temperature environment, this paper describes in detail on how the experimental optical system is established, and the way and method of measurements are presented .A Silica Aerogel nanoporous insulation plate specimen is experimented and its result is compared with the analytical result, their discrepancies are analyzed. This work is intended to give reference to the development of new types of thermal protection system (TPS) with low density microporous material insulations.
Technology Study of Thin-Walled Frame Used in XX Inertial Navigation System Casted by Differential Pressure Casting
Authors: Zhang Xiao Li , Qu Jia , Xie Xia , Tian Hong Chao , Cai Zhi Yuan
Published: March 2012

Frame used in XX inertial navigation system has such characters as small scale, thin wall, complicated shape, etc. When it is casted by gravity casting, the defects such as shrinkage, porosity and blow holes are so many that the survival ratio is very low. In this paper, a new differential pressure casting method is designed to cast the frame by realizing self-hardening sand moulding, solving series of problems such as liquid rising pipe freezing and chemical composition being out of range, thus improving the quality of the cast.
The Mechanical Properties of Platinum-Iridium Alloy Coating
Authors: Chien Hsi Hsin , Ma Kung Jeng , Kuo Chien Hung
Published: March 2012

Glass molding process provides a great potential for the production of precise glass optical components at low cost. The platinum-iridium (Pt-Ir) alloys are widely used as the protective coatings to extend the service life of the mold in glass molding process. This study concentrated on the microstructure and mechanical properties of sputtered Pt-Ir alloy films. The obvious grain growth was observed in the Pt-Ir alloy films at sputtering temperature of 700. The hardness and elastic modulus of Pt-Ir alloy film decreased with the increase in Pt content.
Visible-Light Driven FeS2 Nanosized Photocatalysts Prepared by Solvothermal Method
Authors: Sun He , Tang Pei Song
Published: March 2012

The FeS2 was synthesized using S powder, FeCl24H2O and PVP as main raw materials by solvothermal method. The FeS2 product was characterized by XRD, SEM, DRS and TG-DTA. The results show that FeS2 is the cube structure, particle size about 90 nm, band gap energy Eg=1.9 eV. Consequently, FeS2 nanoparticles show high visible-light photocatalytic activity for decomposition of methylene blue, which degradation rate of 10mg/L methylene blue solution can reach to 95% for 90 min under visible-light irradiation.
A Novel Material Testing Method for Signal Classification
Authors: Xiang Jian
Published: March 2012

In this paper an unsupervised learning algorithm is proposed. We use Independent Component Analysis algorithm to extract the most essential and highly independent features of video materials. It can assist in testing samples and exacting unknown data to obtain favorable classification goal, which is to obtain a good learning ability for generalization. Experiment results show that the approaches are effective to improve the classification accuracy
The APPliCation of Fuzzy Neural Network Control in the AC Speed Adjustment System
Authors: Jiang Yan Lei , Lian Han
Published: March 2012

This paper investigates the complex controlled object. A method of fuzzy-network is proposed. Results of simulation research show that the controller has not only high self-study ability, but also high robustness, and let the performance in AC speed adjustment system quickly improve.
Calculation Method Research of Shear Bearing Capacity for Frame-Sparse Gridiron Composite Wall
Authors: Jiang Xu Feng , Guo Meng , Wu Cheng Hao
Published: March 2012

In order to enhance the anti-seismic performance of the frame structure and masonry structure with frame at bottom layer, combined shear wall consisting of frame and gridiron composite wall was proposed in this paper, and shear bearing capacity calculation method for the wall was researched. 1/2 scale frame-sparse gridiron composite walls were tested under reversed cyclic loading. Damage processes, load-bearing capacity and hysteretic curves characters of the walls were analyzed. Based on the experiments and reinforced concrete masonry walls data, the force features and shear resistance mechanism of the wall were analyzed, and general shear bearing capacity formula were put forward, and application methods under different conditions were given at the same time. Comparative analysis between calculation results and test results indicated that the formula was accurate enough, and can be referred to in the new construction and post-quake reconstruction of frame structure or masonry structure with frame at bottom layer.
Optimal Design of Small Winching Drum Installed in Skidding Tractor Based on Computer Aided Design
Authors: Zhang Pei Jian , Pan Ming Xu , Wang Li Hai
Published: March 2012

Computer aided design was adopted into the design process of winching drum in this paper. First, mathematical modeling was conducted to the design based on traditional means. Then the parameters of the winching drum were optimized by MATLAB. And the smallest drum was obtained under the condition of same length winching rope. In order to check the optimal design result of the strength of the drum in the bad operation environment, finite element analysis method was adopted, which simulated and verified the reliability of the winching drum.
An Optimal Service Selection with Constraints Based on QoS Algorithm
Authors: Li Xin Jun
Published: March 2012

In the paper, we propose an allocation scheme that minimizes the response time and cost of the solution subject to reliability and availability constraints in terms of expected value. The algorithm proposed in this paper aims to discover services with high QoS performance, and reduce the execute time at the same time. First, we identify the impact of various structural aspects of the composition in terms of the performance and outcomes of the composition. Then, an algorithm is proposed which can reduce the computing time and makes sure better quality of the services selection at the same time by examining a very tiny fraction of the solution space.Finally, we proves the advantage of the new algorithm by comparing the time obtained by our proposed algorithm with the one achieved by other algorithm.
The Research on Educational Reform about the Hand-Painted Renderings of Architectural Design of Vocational College for Engineering
Authors: Yang Min
Published: March 2012

The development of human history is inseparable from the living environment of their own planning and mapping, hand-drawn renderings show the form and content but also with other subjects of mutual interdependence and common development with; students in professional knowledge and skills into the process of talent learn to draw renderings interest and enthusiasm alone is not enough, go out the introduction, is the study guide students to establish a correct view of the employment outlook is the best way. The success of hand-drawn renderings to No, it is not the designer's will, the social acceptance and market testing it is the only standard. City can not do without decoration hand-drawn renderings, the process of building new countryside also need hand-drawn renderings.
Parameter Optimization of Injection Closures Molding Based on CAE Technology
Authors: Cao Li Hong
Published: March 2012

Using the PRO-E to build the 3D model of plastic closures and analyze the main shortages of the plastic closures and the corresponding countermeasures; the influencing factors like the polymer injection location, the pressure, the temperature and the time in the plastic closures molding process are studied in this paper based on Moldflow. The injection closures molding parameters, such as the pressure maintaining, the cooling, and the bucking deformation are optimized with numerical simulation.
Design of the Components of the Fe-Based Bulk Amorphous Alloys
Authors: Yang Yu Fang , Gao W. , Yan D.L.
Published: March 2012

It’s well known that bulk Fe-based amorphous alloy is difficult to fabricate, but we develop low price Fe-based amorphous alloys applied in practice after systemic analyzing and considering the cost demand of the application. Finally, there are 7 Fe-based amorphous alloys fabricated by advanced copper mold casting after careful attempt.
Preparation of Porous Ti Plate with Nanograde Pore Size by Dip-Coating Method
Authors: Zhan Min Jing , Li Gang , Wei Qiang , Cui Hua Lei , Lin Ling
Published: March 2012

The porous Ti plates with nanograde pore size were successfully prepared by dip-coating technique, using stainless steel plates as support and 400mesh Ti powders as raw material. The stainless steel plates were firstly dipped into Ti slurry and then pulled out with desired withdrawal velocity. After sintered in a vacuum furnace, stainless steel supports were removed by aqua regia. The obtained products were characterized by X-ray diffraction, sanning electron microscope and N2 adsorption–desorption isotherms. The results had shown that the thickness and pore characters of porous Ti plates could be controlled by adjusting the withdrawal velocity. When the withdrawal velocity was controlled between 0.2mm/s and 1mm/s, the porous Ti plates had smooth surface without cracks and the most pores were interconnected. The maximum pore diameters could be less than 300nm and the porosities of porous Ti plates are more than 4.9%. The kind of preparation method has advantages of simple technology, easy operation and high purity. These indicated that the porous sintering Ti plates were promising to be used as ultrafilter membranes.
Study on Acoustic Emission of 1-3 Orthotropic Cement Based Piezoelectric Sensors
Authors: Xie Shi Hui , Li Mi Mi , Zhou Mei Juan , Sun Min , Huang Shi Feng
Published: March 2012

1-3 orthotropic cement based piezoelectric composites were fabricated by cut-filling and arrange-filling technique, using PZT-51 ceramic as functional material and cement as passive matrix. 1-3 orthotropic cement based piezoelectric composites were prepared into Acoustic Emission (AE) sensors, the attenuation of AE signal on the concrete and the response of different sensors on the concrete with increasing distance were researched. The results showed that the signal strength received by sensing element increases with the increasing PZT volume fraction; signal peaks and amplitude decrease gradually when the testing distance increases; signal strength received on the ceramic title is stronger than on the concrete; the attenuation of signal wave shape received on the concrete is much slower when compared with ceramic title.
Thixotropic Behavior of Semisolid AlSi6Mg2 Alloy under Cyclic Shear Deformation
Authors: Luo Hong Chao , Wu Ying , Chen Shi Pu , Xu En Sheng
Published: March 2012

In the present work, the rheological model (CF model) developed by Chen and Fan[1] for semisolid metal slurries (SSMS) is applied to investigate the thixotropy of the AlSi6Mg2 alloy under cyclic shear deformation. The present investigation indicates that the semisolid AlSi6Mg2 alloy has the thixotropy by the technique of hysteresis loop. Specifically, the area of the hysteresis loop increases with decreasing the up-time, the initial shear rate and increasing resting time, solid volume fraction and maximum shear rate, respectively. These results agree qualitatively with the experimental data. Furthermore, the origin of the hysteresis loop is attributed to the difference between the agglomeration rate and the deagglomeration rate.
Stability Analysis of Sheet Pile Walls by Discontinuity Topology Optimization
Authors: Jia Cang Qin , Huang Qi Wu , Xia Bo Ru , Wang Gui He
Published: March 2012

A kinematic approach based on the framework of limit analysis is applied for stability analysis of sheet pile walls. A rotational failure mechanism is used to computer safety of factor, and the topology optimization technique is employed in the stability analysis. The analyses generally yielded good accord with the results in many aspects of the sheet pile walls behavior. The novel implementation of upper bound method with discontinuity topology optimization is reliable and useful for engineering practice and design.
Study on Structure and Properties of Ti/Pb-PANI-WC Inert Anodes
Authors: Cao Mei , Guo Zhong Cheng , Xie Xiang Lan , He Su Qiong
Published: March 2012

Pb-PANI-WC inert anodes were prepared by direct current and pulse electrodeposition of PANI (conductive polyaniline) and WC particles with Pb2+ on the surface of titanium (Ti) substrate. The anodic polarization curves, cyclic voltammetry curves and Tafel polarization curves were measured in the solution of 50 g/L Zn2+, 150 g/L H2SO4 and 35°C, and the kinetic parameters of oxygen evolution, voltammetry charge, corrosion potential and corrosion current density have been obtained. The surface morphologies of the coating were investigated by using scanning electron microscope(SEM).The results show that the inert anodes prepared by pulse electrodeposition possess lower overpotential of oxygen evolution, higher electrocatalytic activity, and better reversibility of electrode reaction and corrosion resistance.
Mechanical Behavior Research of a High-Rise Hybrid Structure Based on Shaking Table Test
Authors: Zhou Ying , Yu Jian
Published: March 2012

In order to establish the systematic design method of performance-based earthquake engineering for steel-concrete hybrid structure tall buildings, a 1/15 scale model shaking table test is conducted in State Key Laboratory for Disaster Reduction in Civil Engineering of Tongji University. The dynamic property, acceleration and displacement response of the model structure under different earthquake levels are investigated from the test. The failure mode of structure is analyzed and the seismic response of the prototype structure is interpreted according to the similitude relation. The conclusions drawn from this investigation show that the prototype structure can basically satisfy the requirements of no damage under frequent earthquakes and no collapse under rare earthquakes; steel frame- concrete core structural system has good seismic performance under rare earthquake; and the damage of the connection between the steel frame beam and the core wall is the main failure pattern of the structure.
Electro-Assisted Photocatalytic Degradation of Methyl Orange on TiO2 Film Using NH4Cl as Electrolyte
Authors: Zhang Wen Jie , Bi Fei Fei , He Hong Bo
Published: March 2012

Porous and smooth TiO2 film electrodes prepared by sol-gel method were used on methyl orange degradation by an electro-assisted photocatalytic degradation process. The results indicates that methyl orange was barely degraded under the potential alone, availing that potential under 1.8 V had no noticeable effect on removal of the dye. The porous film electrode showed better electro-assisted photocatalytic activity than the smooth film electrode when the potential was above 0.6 V. The porous film showed better activity than the smooth film in nearly all the concentration range except for the highest one. The porous film exhibited better activity than the smooth one.
Effect of Polyethylene Glycol Additive on Structure and Performance of Active Alumina by Reverse Precipitation Method
Authors: Hu Fang , Ma Jiao , Wu Yu Sheng , Zhang Di
Published: March 2012

Active alumina (γ-Al2O3) was prepared from NaAlO2 and HNO3 by a reverse precipitation method with addition of polyethylene glycol (PEG). The effect of PEG additived in the different stages during the preparing process was investigated by powder X-ray diffraction (XRD), fourier transform infrared analysis (FTIR) and nitrogen adsorption-desorption. It was found that the mesoporous alumina sample with the PEG additived into the initial HNO3 solution was the most effective at improving the surface area and the pore volume of γ-Al2O3.
Self-Assembly of Amphiphilic Block Copolymer in Aqueous Solutions Tuned by Host-Guest Inclusion Complexation
Authors: Shuai Yu Long , Zhou Mi , Qian Xin
Published: March 2012

The block copolymer poly (ε-caprolactone)-b-poly (N-isopropyl acrylamide) (PCL-b-PNIPAM) is synthesized via the combination of ring-opening polymerization (ROP) and reversible addition-fragmentation chain transfer (RAFT). PCL-b-PNIPAM can self-assemble into the micelles taking PCL as the cores and PNIPAM as the shells. Add α-CD into the micelles, because the inclusion complexation of α-CD to PCL chains and phenols is stronger than that to PCL, to regulate the hydrophilic and hydrophobic features of PCL chain. So PCL-b-PNIPAM block copolymers have potential application in drug delivery and gene transfection.
Surface Morphology and Interface Reaction of Cu/SiO2/Si (111) Systems Prepared by Radio Frequency Magnetron Sputtering
Authors: Cao Bo , Yang Tong Rui , Li Gong Ping
Published: March 2012

The Cu thin films were prepared at room temperature by radio frequency magnetron sputtering on p-type Si (111) substrates. The surface morphology and interface reaction of Cu thin films were studied at different deposition condition by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results show that the existence of the native silicon oxide layer suppresses the interdiffusion and interface reaction of Cu and Si. The formation of the copper-silicide phase is observed by XRD when the annealing temperature arrives at 450 °C.
Synthesis of a Disaccharide with a Mannose Unit and a Thiol Tether
Authors: Wang Chao
Published: March 2012

The synthesis of a disaccharide containing a thiol-terminated aglycon and a mannose monosaccharide unit was completed.
Pilot-Scale Test on Ozone Pre-Oxidation for Enhanced Coagulation Treatment of the Micro-Polluted Reservoir Water
Authors: Liu Qi Feng , Zhou Xin Tao , Li Zai Dong , Zhan Zhi Gang
Published: March 2012

Pilot scale tests are conducted to study the pre-ozonation effect of the micro-polluted surface water and its influence on the operation and treatment effects of the follow-up filtration units. The results showed that significant improvement of sand filtration performance was achieved through the use of ozone pretreatment, and the filtration cycle was nearly doubled. The THMFP removal rates of the pre-ozonation technology and the conventional technology are respectively 32% and 18%, and the former one has reduced obviously the particle number of sand filtration effluents which implied the reduced probability of detection rates of effluent microorganisms and pathogens. Long-term run effect showed that the pre-ozonation process was superior to conventional processes in CODMn and turbidity removal.
Influence of Flame Retardant on Leather Fatliquoring and Fire Resistance
Authors: Duan Bao Rong , Wang Quan Jie
Published: March 2012

Commercial nitrogen-phosphorus flame retardants (KZR-2, SC-968, FR-102), which are frequently used in textile industry, were imposed on the fatliquoring processes of leather. When 0%, 0.5%, 1.0%, 1.5%, 2.0%, 3%, 6%, 9%, 12﹪and 15﹪ amount of flame retardants was respectively added, their influence on the absorption rate of different fatliquoring agents (synthetic oil, fish oil, vegetable oil and lecithin) and on the flame retardant property were investigated. The absorption rate of fat-liquoring agents was measured by oven and dichloromethane methods. The fire resistance was studied by means of oxygen index, vertical combustion and smoke density. The results show that flame retardants (KZR-2, SC-968 and FR-102) can enhance the absorption rate of fat-liquoring agents in leather by more than 40%. Their ability for this enhancement can be listed as KZR-2>SC-968>FR-102. Among them, KZR-2 owns the best performance for the enhancing of absorption rate ( its influence on the oil is listed as synthetic oil>fish oil>lecithin>vegetable oil).
Study on Properties of NiO-Doping PMSZT Piezoelectric Ceramics Sintered at Low Temperature
Authors: Chen Wei Ye , Zhu Lan , Liu Peng Yi , Lin Cai Ping , Tu Hao Jian
Published: March 2012

The effects of NiO-doping on the microstructure and piezoelectric properties of PMSZT ceramics were investigated. The experimental results indicate that pure perovskite structure was obtained in the doping range. With the increasing of doping amounts, phases shift from tetragonal phase to rhombohedral phase. The mechanical quality factor (Qm) , Dielectric constant (εr) , electromechanical coupling factor (Kp) and piezoelectric constant (d33) increase with the increasing of doping amounts and then decrease, whereas, dielectric loss (tanδ) decrease and then increase. The ceramics with doping amount of 0.1wt.% sintered at 980 °C have the optim properties of Qm=1345, εr=1853, Kp=0.62, d33=375 and tanδ=0.21%。
Ionothermal Synthesis of Sodalite from Metakaolin
Authors: Zhou Xin Tao , Liu Qi Feng , Liu Ying
Published: March 2012

The sodalite was prepared with metakaolin by the ionothermal method in deep eutectic solvent(choline chloride/urea). Such factors as the Na2O/SiO2 ratio, crystallization temperature and time had effects on the structure and property. The high crystallinity and purity of sodalite can be obtained at the Na2O/SiO2 ratio of 3:1, and the temperature of 180°C for 60h. The product was characterized by means of X-ray diffraction, Infrared spectrum and scanning electron microscopy.
The Intelligent Vehicle Control System Based on the Fuzzy Neural Network Technology
Authors: Lian Jin Yi
Published: March 2012

The intelligent transportation system (ITS) is an important field of technology in which all countries over the world compete to make researches and developments, so the research of the intelligent vehicle, which is the main body of the intelligent transportation, is in the ascendant. This paper will discuss the control system of intelligent vehicle. This paper analyzes the technological parts of the intelligent vehicle control system and proposes that the millimeter radar should be used as the main component of the intelligent vehicle environment identification system; aiming at the anti-collision problems of the speeding intelligent vehicles, it puts forward the car rear-end location algorithm and the safe following distance prediction model based on the neural network technology; and it also gives the criterion for margin of the danger and the hardware composition principles of the vehicle control system.
Research on Mesh Optimization of the Finite Element Calculation about Three-Dimensional Foundation Pit
Authors: Feng Shi Lun , Zhou Yu Ming , Li Pu Lin , Li Jun , Li Zhi Yong , Zhu Zhi Qiang
Published: March 2012

Abaqus finite element software can implement three-dimensional excavation design calculation, so authors used Python of Abaqus core language made the 3D design of foundation pit supporting program come ture and also did intensive study of mesh optimization during the process. Authors also did intensive comparison and analysis about grid division of the complex geometry foundation pit, through a regularization partion about a variety of special-shaped pit, we made the automatic division about the structural grid of all kinds of shapes foundation pit successful. On this basis, we achieved better calculation effects of the model. The article will introduce problems about optimization of grid in procedure.
Modal Analysis of Aeroengine Turbine Blade-Disc System
Authors: Zhao Wei Qiang , Liu Yong Xian , Lu Mo Wu , Guo Qing Jun
Published: March 2012

This paper introduces the FEA method for modal analysis of aero-engine turbine blade-disc system. Natural modal analysis for dynamical analysis and the result can be used as criterion of many dynamics characteristics and further analysis. In this paper, the natural modal of an aero-engine turbine blade-disc system with the turbine joint hole fully constrained and in free status is calculated respectively. And the first ten natural frequencies and mode shapes are obtained. Also, vibration characteristics of each natural modal and the corresponding influence on turbine blade-disc system and other structure are discussed. The analysis method and results in this paper can be used for further study on optimal design and vibration safety verification for the blade-disc system.
Influence of Different Steel Grades Casting for Mould Thermal State
Authors: Sun Li Gen , Li Hui Rong , Zhang Jia Quan
Published: March 2012

The steel grade has a great influence to the thermal state of the mould copper plate. The coupled visco-elasto-plastic FEM models have been presented for thermal process analysis of steel and the mould copper plates. With the understanding to the mould thermal state for the different steel grade casting, the characters of mould copper plate thermal state is obtained. It is shown that, the reasonable mould taper and casting techniscs are very important for the different steel grades casting, and they are also the important way to improve the mould life.
An Improved Immune Algorithm for Manufacturing Scheduling
Authors: Laha Dipak , Ghosh Indranil , Dan Pranab K. , Sapkal Sagar U.
Published: March 2012

This paper addresses an n-job, m-machine permutation flow shop scheduling problem to minimize makespan criterion. We present a modification of the best-known immune algorithm of Engin and Döyen (2004) [A new approach to solve hybrid flowshop scheduling problems by artificial immune system. Future Generations Computer Systems 2004;20:1083-1095] for this problem. To evaluate the solution quality and efficiency of the proposed method, the experiments are carried out in two phases on a set of benchmark problems and analyzed. We show, through computational experimentation, that this modification considerably improves its performance without affecting its time complexity. The proposed method also has been compared with the currently best simulated annealing from the literature.
Effect of Nickel Doping on Interfacial Reaction between Lead-Free Solder and Ni-P Substrate
Authors: Osman Saliza Azlina , Ourdjini A. , Aisha I. Siti Rabiatull
Published: March 2012

Due to environmental concern, lead-free solder are taking the place of eutectic Sn-Pb solder in electronic packaging industry. Among various lead free alloys, Sn–Ag–Cu (SAC) alloys are leading lead-free candidate solders for various applications because it is offered better properties. This study investigates the interfacial reactions during reflow soldering and isothermal aging between Sn-3.0Ag-0.5Cu (SAC305) and Sn-3.0Ag-0.5Cu-0.05Ni (SACN30505) on electroless nickel/ immersion palladium/immersion gold (ENEPIG) surface finish. The substrates were subjected to isothermal aging at 125°C for up to 2000 hours with solder size diameter of 500μm. The results indicated that after reflow soldering, (Cu, Ni)6Sn5 IMC is formed between solder and substrate while after aging treatment a new IMC was formed between (Cu, Ni)6Sn5 and substrate known as (Ni, Cu)3Sn4. Moreover, after soldering and isothermal aging, Ni-doped (SACN) solder represents a thicker IMC compared to SAC solder. Aging time of solder joints results in an increase of IMC’s thickness and changes their morphologies to become more spherical, dense and with larger grain size. In addition, the results also revealed that the thickness of intermetallics formed is proportional to the aging duration.
The Role of Form Compositions in Energy Consumption of High-Rise Buildings (Case Study: Iran, Tehran)
Authors: Mahdavinejad Mohammad Javad , Ghasempourabadi Mohammadhossein , Ghaedi Hojat
Published: March 2012

Iran is recognized as one of the largest fossil fuels reserves resources in the world, but it is also suffer from mismanaged consumption. The consequences of this mismanagement have been considered in Iran during recent years and authorities have raised concerns about it. Identification of the optimized orientation and tilt angle for roofs in Tehran- The capital of Iran- in order to achieve the maximum daytime heat gain by photovoltaic cells and minimum energy loss at night in winter is the main purpose of this paper. So this paper makes a comparison in three shape of high-rise building in Tehran and their orientation. The results show that the appropriate direction for gaining more energy in Tehran are north-south and WE-NE direction and the cubic type of building in field of energy consumption is more economically for users
Reactive Blends of Poly(butylene adipate-co-terephthalate) and Thermoplastic Starch
Authors: Arunyagasemsuke Vorawan , Suttiruengwong Supakij , Seadan Manus
Published: March 2012

The blend of poly(butylene adipate-co-terephthalate) (PBAT) and thermoplastic starch (TPS) are a promising way to get a new class of bio-compostible plastic, balance the cost effective issue and good mechanical properties. Blends of both polymers are immiscible in nature. Therefore, to make the blend to be more compatible, some block-copolymer compatibilizer can be introduced. Reactive blend is one of effective ways to create such compatibilization at the interface. The objective of this work was to study the reactive blends of PBAT/TPS in comparison to the physical blend. The reactive blends were prepared in both an internal mixer and a twin-screw extruder. For reactive blends in twin-screw extruder, PBAT, starch, glycerol and reactive agent were all pre-mixed and blended in an extruder on one step process. The weight ratio of PBAT:TPS (starch + glycerol) was fixed at 60:40. The reactive agent maleic anhydride (MA) and peroxide (Luperox® 101) were used at very low level 0-0.1 phr. The mechanical properties, morphology and flows property of blends were characterized using tensile machine, scanning electron microscope (SEM) and melt flow indexer (MFI). The internal mixer torque showed a decrease in a final torque value of TPS when MA being added, confirming the chain scsision reaction of TPS. The finer morphogy and better mechanical properties were obtained in the reactive blend with 0.1 phr of MA and 0.1 phr of peroxide.
Computer Program in Visual Basic Language for Manufacture of Helical Cutting Tools
Authors: Vu Ngoc Thiem , Chang Shinn Liang , Hu Jackson , Wang Tacker
Published: March 2012

The helical cutting tools have complex geometries. A rack cutter is the most economical tool that has been used for manufacturing helical cutting tool. In this paper, the computer program has been designed to evaluate the manufacture abilities following design concept and analyze the technical parameters of helical cutting tool. The program can simulate the sections of helical cutting tool and the rack cutter, analyze the clearance angle, relief angle, and width top of the helical cutting tool, and modify the rack cutter profile to show the helical cutting tool profile suitably. This program can predict the differences during manufacture process and give the best solution for economical consideration.
Modal Parameter Simulation and Model Updating for some Launch Platform
Authors: Hu Chang Lin , Ma Li Yuan , Li Yong Jun , Li Hui
Published: March 2012

The frequencies and vibration modes of a launch platform are acquired through finite element simulation, and their actual values are obtained through modal test. On this basis, constructing objective function for the structure modal parameter relative residual error to be minimum, can transform model updating problem into optimization problem. Then the trust region algorithm is adopted to solve this optimization problem. This algorithm bears better robustness and computing efficiency. Through model updating, the frequency and vibration mode errors are reduced, supplying a basis for further simulation.
An Aircraft Adaptive Control Architecture Based on Nominal Controller
Authors: Zhang Bo , Wang Shu Shan
Published: March 2012

This paper presents adaptive control architecture for the safe flight of a transport aircraft under adverse operating conditions and uncertainties. This architecture combines a nominal controller based on an LQR with integral action, and an adaptive controller that accommodates for actuator saturation and disturbances. In this paper, we consider the control of the C-5 transport aircraft, which is similar to the Generic Transport Model. We delineate the underlying nonlinear dynamic model and introduce various upsets, damages, and failures by representing these various adverse conditions in the form of uncertainties.
Feature Extraction of Gearbox Compound Faults Based on Blind Source Separation
Authors: Wang Xiao Wei , Shi Lin Suo , Zhang Wei , Li Hui
Published: March 2012

Aimed at the diagnosis to compound faults of eccentricity and teeth broken in gear box, the paper presents a method of compound fault diagnosis based on the blind source separation to separate the coupling characteristics in compound faults. The method separates two collected signals including some compound faults into two independent source signals, and then extracts the signal characteristics, i.e. the fault characteristics of gear eccentricity and teeth broken, through resonance demodulation. The result of the experiment shows the validity and practicality of the method.
Design Automatic Fabric Defect Inspection System
Authors: Gao Xiao Ding , Wang Jia Jia , Nie Zhao Ming , Li Yuan Chao
Published: March 2012

The system with four pieces of DSP + FPGA and procesing the digital image information collected with the field reprogrammable array FPGA has been designed, it can realize the automatic detection for the fabric defect. The system make use of four pieces of TMS320C62x as the core to process the digital image information; The FPGA realizes the automatic detection system which controls the interconnect fabric defect. The program based on attributed relational histogram and support vector machin has been designed. The experiment show when the velocity of sample fabric is of 100m/s and 120m/s the rate of recognize nicely with which theautomatic fabric defect inspection system being provided can achieve 80% and 60%.
Clinical Information Research Based on Multiple Stepwise Regression Algorithm
Authors: Yang Xu Ming , Dong Han , Xu Ling Yu , Zhong Fei , Zhu Ying
Published: March 2012

In view of the high incidence of myopia in young people, by multiple regression analysis algorithm applied to acupuncture treatment of young patients with myopia in all the quantitative analysis of influencing factors, we found that patients get the best return for each The equation is not the same, indicating that a variety of reasons of visual acuity, and analyzes the various factors in the equation and the proportion appears in all equations, in the hope of in-depth study through a more comprehensive vision to grasp the changes caused by the substance of meaning.