bluuebunny/crossref_metadata_2025 huggingface dataset:
Technology Test about CBM Extraction from Mining Subsidence Zones Using Surface Borehole in Thick Coal-Bed Mines
Authors: Li Ri Fu , Wen Guang Cai , Si Hu
Published: June 2012

An experiment extracting CBM with surface borehole from mining subsidence area of a 6.25 meters thick coal-bed workface was done in Jincheng city. The test borehole was designed three stages based on the geologic structure of test field. During underground workface passed through borehole, the operational status of well was recorded and the deformation of casing was detected four times. Test has shown that the highest pure flow of surface borehole can reach 8m3/min which proves that the methane extraction technology with surface borehole from mining infection zone has a bright future for application in Jincheng city. But, how to maintain the stability of casing avoiding damage is still a problem, which should be resolved before the drawing technology is used in Jincheng extensively. Besides, the ordinary protecting skills for borehole used in oil exploitation cannot take a satisfactory effect to protect tube against damaging due to overburden rock movement during mining. The casing will be damaged at several positions, especially near the junction of soft and hard strata. It may be right measure to expend the diameter of tube or install special defensive joints at the places where will deform badly under the mining influence.
The Practice about Deep Hole Pre-Split Blasting in Mining Faces of Low Permeability Extra-Thick Seam
Authors: Wang Lin , Li Xi Xi , Zhao Yu Xiang
Published: June 2012

The rate of gas drainage is lower in mining faces of low permeability of extra-thick seam, and with lots of gas emission, which brings greater security risks. Through the Pre-pumping experiment of deep hole pre-split blasting for 216 mechanized mining face in Xiashijie coal mine of TongChuan coal group, increased the rate of gas drainage over 17% in working surface, that reduced potential safety problems during production, and indicated the direction for later gas government.
Research on Fault Diagnosis of Forklift’s Hydraulic System Based on Rough Set Theory
Authors: Su Xin Ping , Nie Guang Kun , Fan Wei Xin
Published: June 2012

An approach of forklift’s fault diagnostic knowledge acquisition and discrete date based on rough set theory was put forward, according to the rough set theory in fault diagnosis of fault tolerance, the use of rough set theory in fault knowledge attribute reduction and value reduction, as in incomplete fault information of forklift hydraulic system fault diagnosis provides a train of thought. The inferential strategy and process of fault diagnosis of hydraulic system for forklift were described. Examples show that the proposed approach is very effective.
Application of PLC in Mine Hoist System
Authors: Yu Miao
Published: June 2012

The control strategy for hoist system based on PLC was proposed in this paper to mend the control shortcomings in the traditional system applying relay logic control circuits. In this paper the hoist structure was analyzed, and the PLC control system realization in hardware and software was introduced too. The control method improves the maintainability and the flexibility of the elevator, extending the using life, and the ideal control effect can be attained. The Practical application showed that this control system has high efficiency, better maintainability and reliability, at the same time, reduce mine hoist system cost .it can be easier to complete more complicate tasks which the traditional control system can not achieve.
Lignite Thermal Upgrading and its Effect on Surface Properties
Authors: Guan Jun , He De Min , Song Bin Bin , Zhang Qiu Min
Published: June 2012

Lignite samples, Huolinhe(HLH) and Xiaolongtan(XLT) lignites were used for experiments. Mild pyrolysis experiments were carried out by final temperature 150～450°C. Physical and chemical properties have been investigated using thermogravimetric, FTIR analysis, nitrogen adsorption and oxygen-functional group analysis. Besides, the changes of the surface properties during upgrading were characterized in detail. The results show that specific surface area and moisture-holding capacity have the trend of first decreases and then increases in the upgrading temperature range. Furthermore, the decomposition of the oxygen-bearing functional groups on the coal surface which reduced the moisture-holding capacity. Oxygen absorption experiments indicate that thermal upgrading could decrease the tendency of lignite to spontaneous combustion.
Governance Practices of Dust in Feeder of Coal Handling System on Mine's Ground
Authors: Ge Shao Cheng , Yang Tong , Jing De Ji
Published: June 2012

It concerns about issues of dust pollution of three feeder which in the underground passage under the storage warehouse of Inner Mongolia Datang International Xilinhaotes Mining Company Limited.By inspections and investigations in the field,according to site-specific circumstances and local climatic conditions,we had implemented comprehensive renovation project of coal dust of feeder in underground passage,and achieved remarkable and effective governance results.
The Depth Analysis of Different Form Sulfur in the Cement Minerals by Three-Step Extraction Method
Authors: Ji Ying , Yang Kang , Sun Zhi , Zhou Wei
Published: June 2012

In order to investigate the different forms of sulfur in the cement, certain amount gypsum were blended into cement raw meal, which was pre-prepared by the cement plant. The above blends were firstly calcined to form cement clinker in a furnace at ~1450oC. Serious chemical solutions, such as, salicylic acid - methanol (SAM), potassium hydroxide - sucrose (KOSH) and acetic acid, were used to select the extractors from laboratory clinker. After the separation of silicate phase, iron aluminate phase, and intermediate phase of minerals, the trace amount minerals phase were enriched. Corresponding analytical methods, such as, XRD, XRF, SEM-EDS, were used to analyze the different sulfur type during the three-step extraction process. As a result, the trace sulfur minerals of cement was identified as three major forms of（KAl(SO4)2）,C4A3S, and（CaSO4）
Comprehensive Recovery of Valuable Metals from Copper Polymetallic Sulphide Ore
Authors: Li Cheng Xiu , Wen Shu Ming , Zhang Jun Hui , Wang Chang Ling , Liu Jian , Shen Hai Ying
Published: June 2012

The study aims to comprehensive recovery of Cu, Mo, Co and Fe from copper polymetallic sulphide ore in Sichuan province, China. In the light of the minerals characteristics, a united flow sheet, i.e., flotation-magnetic separation with new powerful flotation reagents were used to effectively recovery copper together with the associated valuable metals (Mo, Co and Fe) from the ore. The result of the closed circuit experiment shows that a copper recovery of 93.38% with a concentrate grade of 21.25%, Mo recovery of 45.72% with a concentrate grade of 45.78%, Co recovery of 46.42% with a concentrate grade of 0.46% and Fe recovery of 38.26% with a concentrate grade of 63.73% were achieved from the ore.
Comprehensive Utilization of Pyrite with High Content of Asrenic
Authors: Liu Dan , Wen Shu Ming , Xian Yong Jun , Shen Hai Ying , Bai Shao Jun , Zheng Hai Lei
Published: June 2012

A technology of “arsenic removing- sulfuric acid producing- residuals for ironmaking” is proposed for comprehensive utilization of pyrite with high content of arsenic. The effect of roasting temperature and time on arsenic removing was investigated. The arsenic removed residuals obtained under the optimal arsenic removed conditions, was used to be proceeded for sulphur volatilization test. The results demonstrate that final residuals with 63.53% of Fe can be used for steel industry. This technology can be used to fully utilize sulphur and produce high quality concentrate as iron-bearing feed for steel industry, which will help to reduce the pollution of arsenic and extend raw material sourcing for Chinese steel industry.
Flotation Research on Cuprite-Type Oxide Copper in XinJiang
Authors: Xiong Kun , Wen Shu Ming , Zheng Gui Shan , Bai Shao Jun , Shen Hai Ying
Published: June 2012

Low-grade oxide copper ore is an important resource, reserves of which are scattered all over the world. In the present study, the characteristics of oxide copper ore are studied using multi-element analysis and X-ray diffraction. The oxide copper minerals in the ore are mainly in the form of cuprite, malachite, chrysocollite and azurite. The effects of grinding fineness and agent regulation on flotation are also investigated. Floatability was unsatisfactory because of the many kinds of oxide copper minerals present in the sample. The flotation results indicate that a concentrate grade of 18.32% at 73.46% recovery can be obtained using the closed circuit process of one-stage roughing, three-stage scavenging and two-stage cleaning flotation under the optimum parameters, with raw ore characteristics of 1.29% Cu, 92.25% copper oxidation rate, and 65.59% slime content.
Formation of Black Droplets from Coal Biosolubilization
Authors: Shi Kai Yi , Tao Xiu Xiang , Li Zhi , Kong De Shun , Yin Su Dong
Published: June 2012

To study mechanisms of coal biosolubilization, this paper investigated the formation of black droplets on the surface of Sabouraud maltose agar (SMA) culture media through coal solubilisation by Hypocrea lixii AH. The black droplets were collected and weighted. Mycelia of Hypocrea lixii AH were characterized by (Full name is required before abbreviation) FTIR spectra and contact angles. The results showed that the first 9 days are black droplets permeation period, solubilized coal in coal pole keep place due to increase of polarity with mycelia aging. Moisture content of the black droplets was 96.4(±0.2) %, largely resulting in high-polarity property of the black droplets. Furthermore, the comparison on moisture contents of coal and black droplets indicated that the water content of black droplets were from the culture media and bio-oxidation instead of coal self.
Controlled Synthesis and Upconversion Luminescence Properties of Yb3+-Tm3+ Codoped NaYF4 Hexagonal Submicroplates
Authors: Huang Wen Juan , Lu Chun Hua , Song Yan , Huang Heng Ming , Wang Ya Qin , Ni Ya Ru , Xu Zhong Zi
Published: June 2012

We reported the preparation of cubic (α-) and hexagonal (β-) NaYF4 particles in high boiling organic solvents 1-octadecene (ODE) and oleic acid (OA), through a thermal decomposition synthetic route. The as-prepared products were characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), photoluminescence (PL) spectra. By tuning the reaction temperature and time, we could manipulate the morphology, size, and crystal phase of the products. It was found that the α→β phase transition was favored by high reaction temperature and long reaction time. Highly uniform β-NaYF4 hexagonal submicroplates were obtained from α-NaYF4 nanoparticles by prolonging the reaction time. The Yb3+-Tm3+ co-doped β-NaYF4 hexagonal submicroplates showed sSubscript texttrong blue Subscript textand weak red upconversion luminescence under 980nm laser diode excitation. In addition, the dependence of the UC emission intensities upon pump power was investigated.
Dielectric Properties of Zr-Doped CCTO Based Ceramics Prepared via Sol-Gel Method
Authors: Ye Chao Qun , Ding Li
Published: June 2012

The CaCu3Ti4O12 and Zr-doped polycrystalline CaCu3Zr0.05Ti3.95O12 were prepared via sol-gel method. Comprehensive characterization including X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX) were employed to characterize the microstructure, morphology and composition. The dielectric properties of the CCTO based ceramics were studied using impedance analyzer. The results show that replacement of Zr in the Ti- site can achieve the effect of regulation of the dielectric properties.
Investigation of Precipitation in a Aging Hardened Plastic Mould Steel
Authors: Luo Yi , Wu Xiao Chun
Published: June 2012

The aging hardened plastic mould steel 10Ni3MnCuAl after aging at 510 °C is investigated by scanning electron microscope (SEM), transmission electronic microscope (TEM) and three dimensional atom probe (3DAP). The results show that its microstructure is granular bainite after soluted. Its aging hardening is mainly due to the precipitation of a high density, nanoscale and fully coherent NiAl precipitation with the B2 structure for 4 h. Clusters associated precipitates from 3DAP results show that its aging hardening derives from multicomponent precipitate containing Fe, Ni, Al, Mn and Cu, and concentration of Fe decreases with the aging time, while that of Ni, Al, Mn and Cu are opposite, and the ratio between Ni and Al are roughly 1.
Modification of NCC for Improving the Wetting Property with Polyurethane
Authors: Zhang Hao , Song Shu Ping , She Ying , Lang Qian , Pu Jun Wen
Published: June 2012

In this study, different lipophilic groups from 3-aminpropyltriethoxysilane (APTES) and 3-glycidoxypropyltrimethoxysilane (GPTMS) were used to alter the surface structure of nanocrystalline cellulose (NCC). The diversifications of NCC surface resulted from modifiers improved the wetting property between NCC and polyurethane significantly. The modified NCC was characterized by X-ray powder diffraction (XRD). And the wetting property was indicated by contact angle (CA). Epoxy groups from 6% GPTMS led to a 47.6% decline of CA, while the improvement of wetting property from APTES was inconspicuous.
Design and Fabrication of Micropump Actuated by Laser Shock Wave
Authors: Xia Jun Chao , Xiong Liang Cai , Chen Peng , Wu You
Published: June 2012

This paper proposes a novel approach for micropump driven, namely laser shock wave, with the advantages of high energy efficiency, remote control and wireless energy supply. The pump used here has the characteristics of simple structure, easy fabrication and low cost comparing to the traditional micropump. Firstly, a valveless micropump was designed and then manufactured through lithography and bonding. Secondly, modal analysis of the fluid-structure coupling system, i.e. micropump, was calculated, and the first natural frequency was chosen as the frequency of the laser pulse. Finally, experiments were done to validate the feasibility of the driving mode. Results show the new driving mode works well and may provide an alternative approach for microsystem driven.
Preparation and Characterization of PMAA/SiO2 Composite Particle Via Emulsion Polymerization
Authors: Zhang Ke Hong , Du Jun Juan , Xiao Hui , Yuan Yan
Published: June 2012

Silica gel particle was chemically modified by using 3-methacryloxypropyl trimethoxysilane (KH-570) as coupling agent. Then poly methyl acrylic acid (PMAA) was grafted on the surface of particles MPS-SiO2 with the method of Emulsion Polymerization, and grafting particles PMMA/SiO2 were prepared. The grafting particle PMAA/SiO2 was characterized by using FT-IR, TG and SEM. The experimental results show that the graft polymerization of methyl acrylic acid (MAA) on onto the surface of silica gel particles can successfully realized using the method of “graft from”. During the graft polymerization, the grafted polymer layer is a hindrance to the subsequent graft polymerization. When the grafted polymer layer reach to a certain density via overlapping and entwisting, a kinetic barrier will be built up. Hence, the grafting degree of the polymer under a certain condition has a limiting value.
Preparation and Thermal Properties Characterization of Cholesterol-Modified Amphiphilic Chitosan
Authors: Li Feng Hong , Zhang Wen Jing , Li San Xi , Sun Yong , Jiang Tao
Published: June 2012

In this article, cholesterol 3-hemisuccinate (CHS) was synthesized through the functionalization of the end group of liquid crystal monomer cholesterol with succinic anhydride. Hydrophobic cholesterol modified low molecular weight chitosan (CS-CH) was synthesized by 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC)-mediated coupling reaction. Chemical structure, crystalline morphology, and thermal properties of the biological material were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetric (DSC), and polarized light microscopy (POM). The results of POM showed that CHS was a kind of crystalline material with liquid crystal property of cholesterol. DSC showed that the melting point and the crystalline temperature of CHS were 188 °C and 145 °C respectively. DSC also showed that CS-CH was a kind of thermoplastic biological material. The max melting temperature decreased from 120 °C to 110 °C with increasing the weight ratio of EDC/CHS to chitosan.
Numerical and Experimental Study on Fabrication of Microstructure Array with Topographical Gradient via Through-Mask EMM
Authors: Wang Quan Dai , Xiao Ji Ming , Lü Yan Jun
Published: June 2012

To obtain textured surface with low friction and high fluid load support capacity, in this work, based on the basic tenet of fluid film lubrication theory that converging gap is the first necessary condition to generate a hydrodynamic pressure in a confined fluid film, a fabrication method via through-mask electrochemical micromachining (EMM) for microstructure array on metal substrate with topographical gradient in a single micromachining step is investigated. After analyzing the factors that influence the current density distribution on the anode surface in EMM process, three potentially feasible schemes are presented and their fabrication results are predicted through numerical simulation. Combining the simulation results with practical application requirements, the scheme with machining gap gradient is adopted. With the selected fabrication scheme, the experiments are performed and the microstructure array with a feature size of 25μm and a height variance from 12μm to 24μm within 2mm distance has been produced successfully, which is in good agreement with the numerical calculation prediction.
Synthesis and Properties of ZSM-5/MCM-41 Composite Zeolite with a Core-Shell Structure for Cracking of Supercritical n-dodecane
Authors: Na Jin Dan , Liu Guo Zhu , Ji Mei Ling , Ma Xue Song , Hu Shen Lin , Wang Li
Published: June 2012

A set of ZSM-5/MCM-41 composite zeolite were synthesized hydrothermally with CTAB as a template and ZSM-5 zeolite as a silica source. XRD patterns of ZSM-5/MCM-41 zeolites contain the characteristic peaks both of ZSM-5 and MCM-41. TEM images show that ZSM-5 zeolite surface was covered with a MCM-41 thin layer varying the thickness with the crystallization time. The BET specific surface area of the composite zeolite increased with increasing the NaOH concentration up to a maximum at 1.5 M, followed by decreased as the NaOH concentration was increased. Catalytic tests were carried out in a tubular reactor coated with the zeolite on its inner wall at 550°C and 4 MPa. The ZSM-5/MCM-41 zeolite with a core-shell structure exhibited a higher conversion of supercritical n-dodecane cracking compared to ZSM-5.
Preparation and Characterization of Chitosan-Poly(MA-PEG400-SA) Nanoparticles as Drug Carrier
Authors: Zhang Dan , Qiu Fei , Diao Yong
Published: June 2012

In order to prepare chitosan-based nanoparticles for drug delivery, we synthesis chitosan-poly(methacryloyl polyethylene glycol succinic acid, MA-PEG400-SA) nanoparticles in aqueous solution via template polymerization. The structure of the chitosan-poly(MA-PEG400-SA) nanoparticles was characterized by FT-IR spectra, and the particles size and surface charge were analyzed by zetasizer, respectively. The average size of chitosan-poly(MA-PEG400-SA) nanoparticles was approximate 325 nm, and the surface charge was 33mv. Using hydrophilic drug 5-FU as the model drug, the drug loading efficiency was about 6%. In the further study, we will optimize the synthesis conditions and study on the drug release properties of the nanoparticles.
Removing of Nano-Particles from Semiconductor Wastewater Using a Hybrid Treatment System
Authors: Yang B. M. , Kao C. M. , Sung W. P. , Yang C. P. , Chen T. Y.
Published: June 2012

Packaging process is one of the main manufacturing steps in the wafer fabrication industries. However, nano-particles would be produced during the packaging process. The produced nano-particle-contained wastewater has characteristics of dark color and high turbidity. Because the nano-particles would usually result in the clogging of the membrane filtration system when it is used for water treatment and reclamation, the application of a pre-treatment system is required to extend the membrane life. The objective of this study was to develop a pre-treatment system for packaging wastewater treatment before membrane system was applied for further water quality improvement. In this laboratory-scale study, a hybrid treatment system containing a chemical coagulation/flocculation followed by ultra-filtration (UF) membrane technology was developed for the wafer fabrication wastewater treatment. The chemical coagulation/flocculation unit was used as the pre-treatment process to improve the efficiency of the following ultra-filtration (UF) membrane system. The packaging wastewater was collected from a wafer fabrication factory and used to evaluate the feasibility of the coagulation/flocculation process on nano-scale particle removal. Results show that approximately 98% of turbidity could be removed at pH 7 when 2.2 mg/L of polyaluminum chloride (PAC) (used as coagulant) and 0.5 mg/L of polyacrylamide (cPAM) (used as flocculant) were added during the coagulation/flocculation process. Results indicate that the coagulation/flocculation is a feasible pre-treatment process for nano-particle removal before UF membrane is applied for further water purification. Results from this study will be helpful in designing a scale-up system for practical applications.
Adsorption Kinetics of Pb (II) onto Na-Bentonite/Poly AMPS Composite
Authors: Xiao Hai Yan , Gao Kai Sha , Li Qiu Rong
Published: June 2012

Na-bentonite(NB)/poly(2-acrylamido-2-methylpropanesulfonicacid)(AMPS) composite were prepared as an adsorbent for the removal of Pb (Ⅱ) from aqueous solutions. Pb (II) adsorption on the composite is a fast process and follows well the pseudo-second-order kinetics. The FTIR spectra indicate NB and poly(AMPS) are simultaneously operating, and chelation should be the dominating adsorption mechanism.
Formation and Mechanism of Ag/Cu Nanoparticles in Silicate Glass via Ion-Exchange and Reduction Treatment
Authors: Huang Min , Yang Xiu Chun , Zhao Jian Fu
Published: June 2012

Ag-Cu nanoparticles/silicate glass composites are synthesized by twice ion-exchange and reduction treatment. The as-produced glass slides were characterized by UV–Vis spectroscopy, electron probe microanalysis (EPM) and high resolution transmission electron microscopy (HRTEM). The studies show that Ag-Cu nanoparticles aggregate on the surface of the silicate glass, which size is from 2 nm to 8 nm. The copper layer on the surface of glass matrix is about 20 m by compared to Ag layer (120 m), indicating that it is more difficult for copper ions to enter into the interior. Ag-Cu migration in glass matrix cannot be simply ascribed to a direct interaction with hydrogen, but to a more complex process involving a charge balancing mechanism during hydrogen-sodium ion-exchange.
Optical Properties of Ba2-XSrxSiO4: Eu2+, Dy3+ Phosphors and their Applications for White LED
Authors: Zhang Mei , Wang Ping , He Xin , Zeng Qing Guang , Wen Jin Xiu
Published: June 2012

A series of Ba1.91-xSrxSiO4:Eu2+, Dy3+phosphors were synthesized by the high-temperature solid-state reaction. The structure of powder samples were characterized by X-ray powder diffraction. The photoluminescence emission and excitation spectra are also studied. It can be proved the formation of the solid solution of Ba1.91-xSrxSiO4:Eu2+, Dy3+ compounds, and the phosphors can be efficiently excited by UV-visible light from 300 to 480 nm. The as-synthesized Ba1.91-xSrxSiO4:Eu2+, Dy3+ phosphors are promising candidates applicable to near-UV and blue LEDs for solid-state lighting.
Research on a Peristaltic Micropump with Normally Closed Valves Driven By Vacuum Pressure
Authors: Cui Jian Guo , Wang Hong
Published: June 2012

This research presents a vacuum driven peristaltic micropump with three normally closed valves which is controlled by the operational frequency on the electrical magnetic valve. The new peristaltic pump is constructed with three laser-defined structural layers made only of PDMS material and by MEMS (micro-electro-mechanical-systems) fabrication technology. The liquid is driven by the sequential deflection of membranes which are positioned between the gas layer and fluid layer. In order to test the performance of the micropump, the influence of various control and geometric parameters are explored. The experimental results show that the flow rate of micropump can be easily operated by controlled the driving signal frequency on the EMV and the applied vacuum pressure. The optimized operational condition and geometric parameters of the micropump are obtained by experiment.
State of the Art in Finite Element Analysis Technology
Authors: Liu Yang , Li Xiao Jing , Zhao Yan Ping
Published: June 2012

Modern powerful finite element analysis software packages such as ANSYS are now not only an analysis tool but a design tool as well. The new technology makes the mechanical design quantified precisely combining with several physical fields in one. The paper briefly introduces the basic theories and basic steps of solutions of finite element analysis. After introducing the application of ANSYS software, the author proposes some effective solutions to this complicated engineering analytical, which is of practical significance of reference.
The Further Exploration of Applying Small-Strain and Large-Strain Formulations to SMA
Authors: Yao Jie , Zhu Yong Hong
Published: June 2012

Recently, our research team has been considering to applying shape memory alloys (SMA) constitutive model to analyze the large and small deformation about the SMA materials because of the thermo-dynamics and phase transformation driving force. Accordingly, our team use simulations method to illustrate the characteristics of the model in large strain deformation and small strain deformation when different loading, uniaxial tension, and shear conditions involve in the situations. Furthermore, the simulation result unveils that the difference is nuance concerning the two method based on the uniaxial tension case, while the large deformation and the small deformation results have huge difference based on shear deformation case. This research gives the way to the further research about the constitutive model of SMA, especially in the multitiaxial non-proportional loading aspects.
Estimates and Control of Diffeomorphisms in Contact Dynamical System
Authors: Sun Da Wei
Published: June 2012

This paper studies the estimates and control of strictly contact diffeomorphisms in contact dynamical system. By constructing reparameterizing methods for contact system and using some perturbation techniques in Hamiltonian mechanics, this paper proves that the two norms of strictly contact diffeomorphism coincide under a certain condition and gives a variational descriptions of the tine one strictly contact isotopy.
Compensation for Geometric Parameter Errors of a Picking Manipulator
Authors: Wang Yan , Lu Yi Yun , Zhao Hong Bing
Published: June 2012

In order to enhance position accuracy of robots, the precise error model is established by applying homogeneous matrix without any differential or partial derivatives required in other methods. An articulated picking manipulator with four-degree-of-freedom is taken as example to analyze the position accuracy affected by errors of geometric parameters (link length, link offset and twist angle). Furthermore, an error compensation algorithm based on error model and inverse kinematics is proposed and applied to the picking manipulator. Experimental simulation was carried out for verifying the feasibility of the presented algorithm, and results show that the maximum position errors in x, y, z axis have declined from 3.2369mm, 9.5583mm, 1.002mm to 0.1334mm, -0.0488mm, -0.001mm after compensation, which could greatly improve the position accuracy of the picking manipulator.
Perturbation Analysis of Diffeomorphisms in Contact Dynamical System
Authors: Sun Da Wei
Published: June 2012

This paper studies the perturbations of strictly contact diffeomorphisms in contact dynamical system. By constructing new lifting methods for contact system and using some perturbation techniques in Hamiltonian mechanics, this paper proves that there exists an arbitrary small perturbations such that the corresponding function of the strictly contact isotopy does not equal to a constant at any time.
Matriptase Sensitive Gold Nanoparticle Probe for early Cancer Detection
Authors: Zhang Dong Yin , Xue Jian Peng , Tian Jun Mei , Jin Jing , Cao Jie , Cui Si Si , Achilefu Samuel , Gu Yue Qing
Published: June 2012

Matriptase is a type II transmembrane serine protease highly expressed on the surface of tumor cells and participated in a range of human cancers including those of the breast, cervix, ovaries, prostate, colon and gastrointestinal tract. In this study, we developed a new matriptase detection probe with gold nanoparticles (AuNPs). A fluorescence dye was attached to AuNP surface through the bridge of peptide substrate (GRQSRAC). The fluorescence was quenched due to the fluorescence resonance energy transfer (FRET) between AuNP and the fluorescence dye. The fluorescence recovery properties were confirmed by dithiothreitol in vitro. The result of in vitro cell research indicates that the gold nanoparticle probe is sensitive and specificitive for the detection of matriptase expression in early tumor and has great potential in biomedical application.
Application of Dual Frequency IP Method in Southern Peru Copper Deposit Exploration
Authors: Liu Wei
Published: June 2012

By analyzing geological background and landscape feature, and comparing with other geophysical methods, Dual Frequency Induced Polarization (DFIP) method is considered to be the most suitable for the copper deposit rapid exploration in the special landscape area of southern Peru. The conclusion has been proved by two examples of DFIP method survey, one is Cercana-Don Jovier exploration area in the Andes, and another is Rosemary exploration area in the coastal desert area. For giving full play the technical superiority and equipment advantages of DFIP method, some field survey techniques methods which include working frequency, array type, power supply system, measurement system and ways of overcoming interference, are discussed to take fully technical superiority and equipment advantages.
Design of Compound and Intelligent Fire Detector
Authors: Wang Fang , Sun Yun Juan , Li Dan , Zhang Min
Published: June 2012

Along with the rapid development of computer, IC and signal disposal technology,fire alarm system has been more integrated,intelligent and multi-functional. The method of fire detection has also changed from single signal to multiple signal. Temperature sensorPhotoelectric smog sensor and CO sensor are integrated to a compound detector for fireproof. All kinds of signal will be judged by single-chip microcomputer. NN intelligent arithmetic is applied to software design. The Multi-signal synchronization detection is simulated by MATLAB.
Research Progress on Non-Invasive Glucose Monitoring Based on Reverse Iontophoresis
Authors: Liu Yang Yang , Wang Hong , Cui Jian Guo , Wu Ji Yu , Yao Xiao Jing
Published: June 2012

To research the glucose levels with diabetes to reduce complications, a method which is about the noninvasive glucose monitoring based on the reverse iontophoresis has been introduced. This paper summarizes the theory of reverse iontophoresis as well as the method of tissue fluid’s extraction, and reviewed the research progress on non-invasive glucose monitoring based on the principle of the reverse iontophoresis,and investigated glucose sensors for low level glucose monitoring, pointed out the other elements detection based on the iontophoresis method in tissue fluid. The technology based on reverse iontophoresis could be the most possible method to detect glucose noninvasively, moreover the precision and accuracy of the GlucoWatch could be improved in the future.
Decision-Making Model of War-Time Equipment Supply Based on Projection Pursuit Method
Authors: Lin Min , Dong Yu Cai , Luo Jun Zhi , Ma Rui Hong
Published: June 2012

A new comprehensive evaluation of the decision-making model for war-time equipment supply based on projection pursuit method was presented. Compared with other comprehensive evaluation, this method avoids the subjectivity of weight by traditional methods. It’s more scientific and objective.
Selective Wet Etching Characteristics of Aginsbte Phase Change Film with Ammonium Sulfide Solution
Authors: Li Hao , Geng Yong You , Wu Yi Qun
Published: June 2012

The selective wet etching characteristics of AgInSbTe film as a new thermal lithography material were studied with ammonium sulfide solution as etchant. Influences of vacuum-annealing temperature, etchant concentration and wet etching time on selective wet etching characteristics of the amorphous and crystalline AgInSbTe films were investigated. Experimental results indicated that the etching rate of AgInSbTe film increased with the enhancement of crystallization extent, and the etching rate of crystalline state AgInSbTe film annealed at 300°C was 35nm/min in 17wt% ammonium sulfide solution, about 17.5 times as high as that of the amorphous state. Moreover, a good surface morphology of AgInSbTe film with roughness of less than 3 nm was attained in the area of 10×10 μm2 after wet-etching. The wet etching selectivity of the AgInSbTe film was strongly influenced by the annealing temperature and the etchant concentration.
Research on Non-Planar Roughness Based on Laser Speckle
Authors: Zhang Wen Tao , Yang Chuan , Zhang Bao Wu , Xiong Xian Ming
Published: June 2012

Relationship between texture characteristics of laser speckle pattern and surface roughness of turning machinery metal surface was studied in this paper. Based on Wiener filter image processing technology, curve relationship between four texture feature parameters such as energy, entropy, contrast as well as correlation and roughness Ra before and after filtering was also established. Integrated texture feature method was used to analyze the change of each characteristic parameter and roughness Ra and obtain a relatively good curve. The results show that when roughness Ra is in the range of 0.8-6.3μm, energy, entropy and correlation are most suitable to represent surface roughness of turning machinery metal sample.
Rotor Faults Detection in Variable Frequency Motor Based on MUSIC Algorithm
Authors: Liu Fen , Xu Wu Nong , Hu Wen Biao
Published: June 2012

When the variable frequency motor rotor failed, the harmonic components of stator current intensified, which makes the extraction of fault characteristics more difficult. To solve the problem, on-line detection way of rotor faults based on the MUSIC (Multiple Signal Classification) algorithm is presented, which the current signal of inverter DC side is acquired and processed by the algorithm to obtain the fault feature component. The experimental results show the method is simple and effective, which improve the reliability of the rotor fault diagnosis.
The Development of Haydite Biological Filter by Natural Zeolite Doped with Fly Ash
Authors: Shi Yun Fen , Zhan Xiang Xuan , Zhang Geng Yu
Published: June 2012

Complex natural zeolite, fly ash, coment and adherent were chosen as the initial components for preparing biological filter haydite of 5- 7 mm in diameter used in wastewater. The haydite preparation using orthogonal of experiment measured the bulk density, apparent density, specific surface area, crushing strength and wear rate. According to the principles for making aggregates and the results of the orthogonal design method obtained the optimal ratios of the components and reaction time. The results show that zeolite quantity 60%, coment-to- fly ash 6:4 , adherent quantity 4%, zeolite haydite natural drying time 2.8 h, curing in tap-water 28 d. The microstructures and characters of zeolite aggregates were observed by scanning electronic microscope.
Application of Silicone TQ Resin Reinforced RTV Silicone Rubber in Architecture
Authors: Li Yang , Gu Wen Juan , Yang Da Yu
Published: June 2012

A kind of silicone TQ resin was first synthesized with Dodecyltrimethoxysilane (WD10) and tetraethoxysilane (TEOS) by sol-gel method. And the RTV (Room Temperature Vulcanized) silicone rubbers using as-synthesized TQ silicone resins as filler were prepared. Thermal degradation and mechanical properties of these RTV silicone rubbers were studied by means of thermogravimetric analysis and tensile testing. The experimental results showed that both mechanical properties and thermal stabilities of RTV silicone rubbers were significantly improved by using the as-synthesized TQ silicone resins as filler. The RTV silicone rubber can be used to make the molds of architectural components ornamentation. The aim is not only to repair architectural components with decoration, but also for further study and research of ancient architectural conservation.
Hyperbranched Polyether and Polyether-Urethane Composites with Interpenetrating Networks
Authors: Song Xue Jing , Luo Yun Jun
Published: June 2012

In order to improve mechanical properties of polyurethane, hyperbranched interpenetrating network(H-IPN) was achieved by incorporating hyperbranched polyethrs into polyether-Urethane that derived from hydroxyl terminated ethylene oxide tetrahydrofuran copolyether (PET) and isophorone diisocyanate (IPDI). It was found that H-IPN exhibited dual-phase morphology, and hydrogen bonding was formed between hyperbranch polyether and polyether-Urethane. H-IPN shows synergetic effect, the tensile strength of H-IPN increased from 1.39MPa of neat polyether-Urethane to 2.67 MPa; Meanwhile, the elongation increased from 605% of control sample to 2304%.
The Study of the Oil Unit Connectivity for Microscopic Displacement Efficiency by CT Scan
Authors: Lu Hui , Yang Sheng Lai , Zhang Yan Bin , Xie Li , Zhou Ke Hou , Ma Bing , Chen Hao
Published: June 2012

In this paper, the main factors that affect the displacement efficiency were experimental studied by means of the physical cylinder model filled with sand, based on the high efficiency of oil displacing water in the process of hydrocarbon accumulation. After eliminating of some factors that affect displacement efficiency, such as viscosity ratio, wettability and reservoir heterogeneity and so on, the research founds that the crude oil unit connectivity, that is continuity of displaced phase, has a significant impact on the displacement efficiency. The experimental results show that the crude oil unit connectivity is more than wettability, and not less than viscosity, as the factors of the impact of displacement efficiency. If the crude oil unit connectivity is serious damaged, even if the wettability of reservoir rocks was changed by improving the viscosity of injected water, its effect of enhanced oil recovery should not be obvious. In fact, this is main reason that the effect of current the EOR method such as polymer flooding, surfactant flooding and stuff was not obvious. It is expected that the research results will be useful in the displacement efficiency of waterflooding that is controlled by the crude oil unit connectivity.
Spectrum Study of Crystal Fe: LiNbO3 in Infrared-Visible-UV
Authors: Ju Hai Lang , Mao Zong Liang
Published: June 2012

LiNbO3 is an important crystal which has piezoelectric, ferroelectric and electro-optical functions. It has a wide range of applications. Transmission and reflection spectrum of the LiNbO3 samples on the infrared-visible-ultraviolet light have been measured.The wavelength range is 200nm-2000nm. The transmission and reflection spectrum. The absorption coefficient was calculated by transmission and reflection spectrum. The absorption coefficient of the three samples increased slightly in the beginning of the scanning. Then there was a sudden change upward near 8.4*1014 Hz. Forbidden band Eg was obtained from absorption spectrum. The Eg of the three samples were obtained as 3.996ev,3.407ev and 3.425ev respectively. Forbidden band of LiNbO3 crystals was decreased as the iron doped.
Study on Damage Mechanism for Foundation Pile of Girder Bridge under Seismic Influence
Authors: Chen Hong Kai , Tang Hong Mei , Zhao Xian Tao , Hu Yi , He Xiao Ying
Published: June 2012

Based on the analysis for seismic load and failure modes of pile foundation, this article adopts dynamic Winkler foundation beam model, and employs continuous distributional and independent spring and damper, instead of the dynamic resistance of the soil around the pile, and to explore interaction between pile and soil dynamic at horizontal load. In consideration of six kinds of boundary conditions combination, this paper proposes the solution method for displacement and internal force on pile. From analysis of cases, it finds that the effect of pile’s length on dynamic response can be negligible when pile slenderness ratio l/d>20, and the pile can be simplified into infinite long pile. Dynamic response of pile increases with the increase of stiffness ratio. When establish the control equations, influence of axial force can not be ignore. Otherwise, results will be small than the actual value.
Using Plain Chute to Recovery Gold from Leaching Residue
Authors: Liu Quan Jun , Deng Rong Dong , Yang Jun Long
Published: June 2012

Based on the analysis of the properties of leaching residue of the gold flotation concentrate, through the application of newly-developed multi-layer automatic plain chute, it is possible to recover natural gold, pyrite and other metallic minerals from the leaching residue of flotation concentrate by using the gravity separation method, which enhanced the index of ore dressing recovery rate. Meanwhile, the secondary resources have been obtained comprehensive utilization.
Effect of Hydrothermally Prepared Graft Copolymer Addition on a Brittle Matrix: A Preliminary Study on Glass Fiber Reinforced PLA/LLDPE-g-MA Composite
Authors: Kunwar Anil , Gurung Roma , Park Seok Geun , Lim Jae Kyoo
Published: June 2012

Green chemistry approach (hydrothermal process) is utilized for grafting maleic anhydride (MA) into linear low density polyethylene (LLDPE), thereby enhancing the compatiblility of the latter in its blend with polylactic acid (PLA). The grafting of MA into LLDPE is confirmed by Fourier Transform-Infrared Spectroscopy (FT-IR) analysis. LLDPE-g-MA content in PLA matrix is varied as 4% wt., 8% wt. and 12% wt. when preparing glass fiber reinforced PLA/LLDPE-g-MA thermoplastic composite via hot pressing. Single Edge Notch Bend (SENB) specimens have been prepared from the composites and three point bend test was performed.The load-displacement plot of the test results indicates that the ductility index (DI) increased for the samples with increased LLDPE-g-MA content. The observation of the fractured surface of specimens in Scanning Electron Microscope (SEM) suggests that the improved DI value is because of the increased matrix ductility owing to the plasticizing effect of the LLDPE-g-MAH inclusion.
Effects of Chitosan/TiO2 Composite Coating on Keeping-Fresh of Stauntonvine
Authors: Yuan Zhi , Wang Ming Li , Li Xia
Published: June 2012

The effects of Chitosan/Nano-TiO2 composite coating in extending postharvest life of stauntonvine and maintaining their qualities were investigated. Stauntonvine were treated by chitosan/nano-TiO2 composite coating and chitosan coating respectively. Changes in respiration rate, ascorbic acid content, titrable acidity, soluble total sugar were measured and compared. Compared with chitosan coating, the application of Chitosan/Nano-TiO2 composite coating could reduce the respiration rate and the loss of ascorbic acid, and also could increase the titrable acidity, soluble total sugar, and partially inhibited decay of fruit during storage.
A Study of the Performance of Dissimilar A-TIG Welds
Authors: Cheng Hsien Kuo , Yao Long Tsai , Chang Pin Chou
Published: June 2012

The performance of dissimilar activated tungsten inert gas (A-TIG) welding on the welds morphology, angular distortion, and mechanical properties in dissimilar metal plates were investigated. Autogenous TIG welding process was applied to the JIS G3131 mild steel and type 316L stainless steel through a thin layer of activating flux to produce a butt-joint weld. CaO, SiO2, Fe2O3, and Cr2O3 fluxes were used as the activating fluxes. The experimental results indicated that the SiO2, Fe2O3, and Cr2O3 fluxes can increase joint penetration in both of the 316L stainless steel and the JIS G3131 mild steel. The CaO flux only can increase the joint penetration of the mild steel. The reversed Marangoni convection are considered to the main factors for increasing penetration of A-TIG on dissimilar welds in this study. Furthermore, TIG welding with SiO2 powder can significantly reduce the angular distortion and increase the tensile strength of the dissimilar weldment.
A Brief Study on the Problems and Promotion of Chinese Steel Industry and Building Materials
Authors: Hou Xiu Li , Zhang Wen Long
Published: June 2012

Steel is one of the most fundamental materials in national construction, with an ever-increasing output these years, with an ever-increasing output of steel these years. The whole industry has gained a good and vigorous momentum of development, with the structure of steel products remarkably promoted, the concentration of steel production lowered, and state-owned enterprises decreased and private ones increased proportionally. However, there are still several problems with steel industry, which are in dire need to be solved.To this end, a recycling process of steel production is proposed to ensure a promising future for steel industry.
Study States on Surface Protection of DS Surface Material Damage
Authors: Tong Hui , Wei Shi Cheng , Chen Yong Xiong , Liu Yi , Tian Hao Liang , Xu Bin Shi
Published: June 2012

This paper mainly introduced the causations of deep-sea submersible (DS) surface material damage and some methods of research on corrosion and fatigue. It is suggested that investigating the mechanisms and effects of corrosion and fatigue damage on DS steel structure and coating, and the mapping relation for the origin and accumulation of cross scale damage should be established. In addition, organic coating, metallic coating, steel matrix and their interaction could be detected and analysed using the methods of SEM, XRD, TEM, EIS, EN, CV, Kelvin probe and so on. At last, mathematical model of service life for the steel structure and coating should be established for the quantification study
Study on Composition and Mechanical Property of New High Abrasion Resistant Alloy Used in High Arc Spaying
Authors: Tian Hao Liang , Wei Shi Cheng , Chen Yong Xiong , Tong Hui , Zhang Zhi Bin , Xu Bin Shi
Published: June 2012

Spraying wire was widely used in remanufacturing work piece for worn failure. With the demand of high abrasion resistant wire, new type alloy was developed. The solidification structures of the new high abrasion resistant alloy (HARA) containing Mn, Cr, Si, C and the structure was studied after tension by scanning electron microscopy (SEM). The phase evolution was analyzed by X-ray diffraction and Rockwell hardness evaluated on the hardness testing. The abrasion behavior of HARA alloy used in the liner of wet-grinding machine in metallurgical industry is investigated under impacted energy of 0.5-3 J in acid-ironstone slurry; the test was carried out by a modified MLD-10 tester. The result show that the solidification structures of HARA alloy consist of austenitic Fe and the hardness neared to HRC60. Under the high energy, the wear resistance of HARA alloy is three times more than Mn13. Therefore, the new material has better abrasive wear resistance and lower environmental impact