bluuebunny/crossref_metadata_2025 huggingface dataset:
Design Analysis of Shallow Embedded Column Foot of Reactive Powder Concrete Pole
Authors: Jia Yu Zhuo , Yu Xin Min , Zhang Liang
Published: October 2013

According to the existing specifications, design shallow embedded column foot of 500kV self-supporting partially prestressed reactive powder concrete pole, and perform numerical simulation of column foot stress under actual working condition by using finite element analysis software ANSYS WORKBENCH. Results show that the mechanical characteristic of shallow embedded column foot is good. It can well transmit larger axial pressure, pulling resistance and horizontal force generated by top load of RPC pole. Through the simulation analysis we found that shallow embedded column foot has high safety reliable degree under operation condition, can be used in the current 500 kV transmission lines; In terms of construction technology performance, construction of shallow embedded column foot is simple and quick, can effectively reduce the complexity of construction, shorten the construction period.
Research on Application of Non-Equilateral Angle Steel for Transmission Towers
Authors: Jia Yu Zhuo , Xi Hai Hong , Zhang Liang
Published: October 2013

In Chinese transmission towers, all the steels are equilateral angle, most of the diagonal and secondary members are in one-sided bolt connection working condition, so the force is eccentric. When the length within a certain range, relative to the equilateral angle, non-equilateral angle steel under this working condition to be able to withstand a larger load, and the ability to cross-sectional area smaller, reducing the weight of the whole base tower. In order to solve the above problems, through research and analysis of large-scale finite element software ANSYS diagonal and secondary members for transmission tower angle steel model length which can be equilateral angle replaced non-equilateral angle steel. Eventually found that when the length is small long side is connected to non-equilateral angle steel are available, and when the length is bigger short side is connected to non-equilateral angle steel are available.
Predicting the Characteristics of Biofouling Mass Based on Support Vector Machine
Authors: Wen Xiao Qiang
Published: October 2013

A new prediction model of material chemical character effects on biofouling mass was built based on Support Vector Machine (SVM), in which there were four input vectors, which were carbon content, hydrogen content and oxygen content of the solid materials and flow rate, and one output vectors, which was the average amount of biofouling formed on the solid surface. Firstly, creating the sample database and normalizing all samples. Secondly, training the model based on the training samples to obtain the optimal prediction model, then, predicting the training samples. Comparing with experimental results, the accuracy of the SVM model is 95.5%. Besides, the model was tested by poly (ethylene terephthalate), and the predicted and actual results are consistent. Thus, the construction of the predictive model is reasonable and feasible.
Aseismic Analysis on Separation Joint of Atrium Roof and Connection Modes with Tower
Authors: Zhou Jun , Han Xin , Jin Min
Published: October 2013

The atrium roof system of shared space concerning large public buildingsis studied in this paper. The steel truss roof is wrapped with glass curtain wall which is relatively flexible and it is connected to the tower which is relatively rigid. Different separate means of the atrium roof as well as different connection modes between atrium roof and tower have great effect on mechanical performance of the whole structure. By comprehensive comparing various schemes of atrium roof and connection modes with tower, the internal force, displacement, modal as well as other parameters of roof and tower have been studied. The optimal connection scheme is also determined, which has good reference value for practical projects.
Performance of Steel Pipeline with Concrete Coating (Modeled with Concrete Damage Plasticity) Underseismic Wave Passage
Authors: Dulinska Joanna M. , Jasinska Dorota
Published: October 2013

The paper presents the analysis of the dynamic response of a steel pipeline with concrete coating to a real earthquakeregistered in central Poland in 2012. The peak ground acceleration of the shock was scaled up to maximal values predicted for this seismic zone. To represent theinelastic behavior of the material of the concrete coating under dynamic loading, the concrete damaged plasticity constitutive model was assumed.The modelallows to describeplastic strains and irreversible tensile and compression damage that occurs during the cracking process.For seismic analysis two models (uniform and non-uniform) of kinematic excitation were applied. In the modelof uniform excitation it was assumed that the motion of all supports was identical. Inthe model of non-uniform excitation, typical for long structures, the wave passage along the pipelinewith different velocities (500, 400 and 300 m/s) was taken into account. It occurred that for the model of uniform excitation the concrete material of the coating remained elastic with no tensile damage. For the model of non-uniform excitation, inelastic behaviour of the coating was observed. The plastic strain areas appeared above all supports. The tensile damage (cracking) wasalso noticed in these areas: the lower wave velocity was assumed, the greater area of concrete coating was affected by plastic strains and tensile damage (cracking). It was the consequence of the quasi-static effects which resulted from ground deformations imposed on the pipeline during the seismic shock.
Gobi Inclined Excavation Based Numerical Analysis
Authors: Qin Li , Zhang Hai Jian
Published: October 2013

Gobi inclined excavation foundation is based the advantages of good direct excavation, this paper mainly studied the angle inclined excavation foundation problems. Through the force, the size of the displacement, the optimal measure the tilt angle. And determine the limit load in the text.
The Numerical Simulation Analysis of Transmission Lines New Composite Type Foundation
Authors: Jia Yu Zhuo , Wang Mei Qi , Zhang Jun , Liu Jing
Published: October 2013

Using the software of ABAQUS,for the Geological conditions that the upper part is the clay and the Lower part is the rock..The model of digging plus rock bolt Complex environmentally undisturbed soil foundation combined with soil.Which analysis by the numerical simulation.Refer to the test compound type foundations Dimensions,get a three-dimensional finite element model.Applying the same concentration and test loads.Get the oad-displacement curve obtained by calculation.Measured values with the experimental results was very close to,This proved the feasibility of numerical simulation methods.
Dynamic Stability Analysis of the Tower Structure of Construction Elevators
Authors: Qin Xian Rong , Hong Ying , Yue Peng , Zhang Qing , Sun Yuan Tao
Published: October 2013

This paper proposed a method of dynamic stability analysis for the tower structure of construction elevators based on dynamic eigenvalue method. The method employed the time frozen formulation to model the problem, and the stress field from transient analysis was utilized to simulate the pre-stress effect of buckling analysis. The proposed method was applied to estimate the dynamic stability of the tower structure of construction elevators under moving loads, and the results suggest that high coefficients of lateral load and inclined tower structure will dramatically reduce the stability of the elevator in the construction process.
Development of High Compressive Strength Fire Brick
Authors: Pisitsungkakarn Sumol Sae Heng , Ubolsook Putthadee , Watanapa Anucha
Published: October 2013

This research into the development of high compressive strength brick reports the experiment of the high compressive strength brick made out of alumina and rice husk ash with the following ratios: 40:60, 50:40, 60:40, 70:30 and 80:20, with 10% or 15% of sodium silicate according to weight. The burning temperature was set at 1,000 °C and 1,200 °C. It was found that in term of density, the brick with the ratio of 80:20 with 15% of sodium silicate yielded the highest density with 3.3 g/ cm3. As for the compressive strength, the brick with the ratio of 80:20 with 10% of sodium silicate burned at 1,200 °C yielded the compressive strength of 528 kg/cm2. The brick with the ratio of 80:20 with 10% of sodium silicate had the lowest absorption of 15.68%. As for the shrinkage, the brick with the ratio of 40:60 with 10% of sodium silicate had the highest shrinkage of 1.98%.
Constitutes Model of Housing Prices and Analysis of the Reasons for High Prices in China
Authors: Huang Jing Lian , Liu Ya Jing
Published: October 2013

By the study of changes in housing prices in Chines domestic during 1997-2009, we establish a Chinese house prices constitution model based on Analytic Hierarchy Process. The model is including five elements, namely, land acquisition costs, construction costs, the state's tax policy, developers expected profits and cost of sales, which does not consider regional differences. Because China has a vast territory, the regional economic development is uneven and housing prices are quite different, we select the typical city to modify the model based on different types of urban land cost impact on house prices. Meanwhile,we analyze the affect of the five elements to house prices changes. Further,we taking into the influence of land to the house prices of different types of urban, and the justifiability of land prices are analyzed and evaluated quantitatively. According to the calculation results, analyzing the reasons of high house prices in China and some suggestions are given.
Seepage Mechanics Mechanism of Undercompacted Mudstone's Formation
Authors: Feng Chong , Cai Hua
Published: October 2013

Buried mudstones general have undercompacted phenomenon. Undercompacted mudstones have the characteristics that the porosity and pore fluid pressure are abnormal bigger. In order to disclosure the seepage mechanics mechanism of undercompacted mudstones formation, this paper has summed up the seepage mechanics relationship when fluid flows through the mudstone, and has verified the relationships between the key physical quantities with the minimal pressure (pressure that can let the fluid flow in the mudstone) by the experiments in physics. This paper has also analysis the formations process of undercompacted mudstone. The result shows that, the flow regime of fluid in the mudstone is the low speed seepage, and it is not applicable by Darcy equation; the fluid what flow through the thick and heavy compacted mudstone has the big minimal pressure. At the beginning or during the deposit, the rule of fluid flow in the mudstone decides that the fluid inside of the mudstone is more difficult to flow out than the fluid surface of the mudstone, and the inside mudstone becomes undercompacted. Because of the undercompacted mudstone is more important for the exploration of oil and gas, it has theoretic and practical sense to analysis the formations mechanism of the undercompacted mudstone.
XRD (X-Ray Diffraction) Analysis of the Stabilized Ash
Authors: Zhang Hai Ying , Li Shu Zhen
Published: October 2013

MSWI (municipal solid waste incineration) fly ash, generated in incineration process of municipal solid waste, contains lots of heavy metals, which will do harm do the environment if extracted. In this work, the ash is stabilized by cement to reduce leaching toxicity of heavy metals. Besides, mineralogical compositions of the product of different cement / ash ratios after conservation for different period were analyzed by means of XRD (X-ray diffraction). It was found that major mineralogical compositions CaCO3, Ca (0H)2 and C-H-S hydration products. Content of Ca (0H)2 and C-H-S rises with increase of conservation period and cement / ash ratio.
The Study about the Effect of Geometric Parameters' and Material Properties’ Changing on the Electromagnetic Performance of BSSAS
Authors: Peng Fei , Xie Zong Hong
Published: October 2013

This paper introduced a research work on the development of a Broadband Smart Skin Antenna Structure (BSSAS). This structure possessed the load-bearing, shape maintaining and communication capabilities at the same time. A frequency-independent planar log-spiral antenna suitable for electromagnetic communication from 0.8GHz to 8GHz was embedded in a composites sandwich panel. Numerical models have been generated to analyze the effect of geometric parameters and material properties changing on the electromagnetic performance of BSSAS. The numerical results showed that both VSWR and the maximum gain of BSSAS at 1.2GHz and 1.6GHz were not sensitive to the geometric parameters and material properties of the packaging structure.
Coefficient of Performance of Thermoelectric Cooling on Nanofluids
Authors: Maneewan Somchai , Thongtha Atthakorn , Punlek Chantana
Published: October 2013

This paper reports on experimental comparisons of coefficient of performance (COP) of a thermoelectric coolingsystem which cooled the hot side of the TEC by water (wc), ethylene glycol (egc) and nanofluids (nfc) The nanofluids is composed of ethylene glycol with silver nano(35 nm).The TEC was composed of the TE cooling modules, heat exchanger, and the air cooled heat sink at the cold side of the TE modules.Experiments were conducted with various current input 1 - 4.5 A to find out the optimum current input condition. To consideration of cooling capacity and COP of system was measured the hot and cold side temperature of TEC. Results shown that, the cooling capacity was increased with current input. The maximum cooling capacity of nfc, egc and wc are about 72, 62 and 41 W, respectively. Considered with highest COP found that the optimum current input is approximately 2.5 A. The maximum COP of nfc, egc and wc are about 2.01, 1.7 and 1.12, respectively. Therefore, the proposed TEC-nfc concept is expected to contribute to wider applications of the TE cooling system.
Wear Mechanisms Analysis of Material 20Cr2Ni4A
Authors: Li Li , Zhang Guo Zheng , Fu Zhen Yu , Li Tao , Liu Jin Jun , Tian Zheng Yu
Published: October 2013

In this paper, by combined analyzing the configuration, content and composition of the wear debris in the lubricating grease and the surface state of the worn surface with ferrography and surface analysis techniques, the wear mechanism of material 20Cr2Ni4A was determined. Results showed that the controlling wear mechanism is combined abrasion, adhesion, contact fatigue and corrosion wear.
Investigation of Y1-xCaxBaCo2O5+δ Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells
Authors: Ge Wu Jie , Shao Qun , Ding Yan Zhi , Lu Xiao Yong
Published: October 2013

Double-perovskites Y1-xCaxBaCo2O5+δ(YCBC,x = 0.1-0.5) were synthesized with a auto ignition process and were assessed as cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCx) based on Sm0.2Ce0.8O1.9(SDC) electrolyte. X-ray diffraction confirms that there are some undesired peaks in YCBC0.1 and YCBC0.5, while the YCBC (x = 0.2-0.4) retains single phase with tetragonal structure. The YCBC materials exhibit chemical compatibility with SDC electrolyte up to a temperature of 1100°C. The conductivity of the samples decreases with increasing Ca content, and the maximum conductivity of YCBC is 506 Scm-1for x = 0.2 sample. The increased doping of Ca deteriorates the area-specific resistances of YCBC (x = 0.2-0.4) cathodes. The Rp values of YCBC cathodes at x = 0.2,0.3 and 0.4 on the SDC electrolyte are 0.26, 0.53 and 1.19Ωcm2at 650°C, respectively. This study suggests that YCBC0.2 can be potential candidates for utilization as IT-SOFCs cathode.
Synthesis of Carboxybenzyl-Protected 2′-Deoxynucleoside 5′-Phosphoromorpholidates
Authors: Gong Shan Shan , Liu Guo Dong , Sun Qi
Published: October 2013

Four deoxynucleoside 5′-phosphoromorpholidates were prepared from carboxybenzyl-protected 2′-deoxyribonucleosides. The synthetic route involved three consecutive steps including phosphitylation, acid-catalyzed hydrolysis, and oxidative coupling reactions.
An Improved H-Phosphonate Method for the Preparation of α-L-Rhamnosy-1-Phosphoramidates of Amino Acid Methyl Esters
Authors: Gong Shan Shan , Liu Guo Dong , Yang Qing Kun , Sun Qi
Published: October 2013

A series of α-L-rhamnosyl-1-H-phosphoramidates of amino acid methyl esters were synthesized via an improvedH-phosphonate protocol. Their structures were confirmed by NMR, IR, and MS analysis.
A Novel Synthesis of AZT-5'-Glycosyl-1″-H-Phosphonate Diesters
Authors: Gong Shan Shan , Liu Guo Dong , Li Xing Jian , Sun Qi
Published: October 2013

A novel and efficient method for the preparation ofO-AZT-5′-O-glycosyl-1-H-phosphonate diesters has been developed. TheH-phosphonate diesters were synthesized by tandem substitution reaction on PCl3with 2,6-lutidine as base.
Effect of Polyethylene Glycol (PEG) on Molten Plasticized Cellulose Acetate (CA)
Authors: Chuai Cheng Zhi , Zhang Zhi
Published: October 2013

Ethylene glycol (EG) and polyethylene glycol (PEG) were added as plasticizers to improve the processing performance of cellulose acetate (CA). The CA with 30% plasticizers were melted by HAAKE at 200 °C. The effects of EG and PEG (degree of polymerization in 200-800) on rheological properties and mechanical properties of CA were investigated. The results show that the plasticizing time, equilibrium torque and melt viscosity of the plasticizing system increase with the increase of PEG molecular weight, while the processing performance decreased. The tensile strength of the system decrease as the PEG molecular weight increased. The plasticizing system which contents 30% PEG-200(degree of polymerization is 200) shows the maximum elongation at break. The minimum values appeared in both flexural strength and flexural modulus in the CA/PEG-200 system.
Crystal Structure of Mg (II) Complex with 1,5-Naphthalenedisulfonate
Authors: Zhao Wen Hua , Chen Yuan Tao , Tai Xi Shi
Published: October 2013

A new Mg (II) complex, [Mg (H2O)6]·(L) (L=1,5-naphthalenedisulfonate) has been obtained by the reaction of MgCl2·6H2O with sodium 1,5-naphthalenedisulfonate in the CH3CH2OH/H2O (V:V=3:1) solution. The complex was characterized by X-ray single crystal diffraction analysis. The results showed that the local geometry around central Mg (II) ion can be described a distorted octahedral environment which connected by six water molecules. The one domensional chained structure of complex formed by hydrogen bonds of intramolecule and intermolecule and π-π stacking.
The Study and Characterization of a Novel Structure of 1,3,5-Benzenetricarboxylic Acid
Authors: Tan Hai Yan , Liu Cheng , Wu Jin Ping
Published: October 2013

A novel ten-interpenetrating structure of 1,3,5-benzenetricarboxylic acid was grown under solvothemal condition after heated it 16 hours. It was characterized by FT-IR, HNMR, X-ray diffraction, HRTEM. HRTEM obtain the relevant information of structural morphologies. The result of HRTEM showsed this material owned special lamella structure. X-ray diffraction showed the crystal of the new structure is of monoclinic system, space groupP1 with a=26.5039(17), b=16.4121(17),c=26.550(2)Å,α=90.00, β=91.533(2), γ=90.00, V=11544.4(17)Å3, Z=8, Dc=1.451g/cm3,μ=0.126mm-1,F(000)=5184, R=0.0891 and w (R)=0.1819 for 11318 observed reflection with I>2(I),hydrogen bond contributed to the stability of the structure. The fluorescence spectra indicated that the title compound had two stronger emission peak at 346nm and 400nm. Keywords:1, 3, 5-benzenetricarboxylic acid; novel structure; ten-interpenetrating
Properties of Organic Light Emitting Device with ZnO Anode Buffer Layer
Authors: Wang Ying Lian , Ye Jun Yao
Published: October 2013

Organic light emitting devices with the structure of ITO/ZnO/TPD/Alq3/Al were prepared by vacuum thermal evaporation method. By establishing multi-layer structure model, the photoelectric properties of the devices with different thickness ZnO anode buffer layers were discussed, the relationship of current density and luminous efficiency with work voltage was found and the comparison analysis with CuPc devices were carried out as well. The results showed that ZnO as the stable dipole layer between ITO and TPD can reduce the potential barrier for holes injection, promote the compound of electrons and holes, when ZnO thickness was 3 nm, the devices had minimum potential barrier and best luminous efficiency, the brightness increased nearly three times than traditional CuPc devices.
One-Pot Synthesis of P1,P2-Diaciclovir-5'-Diphosphate from Aciclovir 5'-H-Phosphonate
Authors: Ding Hai Xin , Liu Si , Gong Shan Shan , Sun Qi
Published: October 2013

P1,P2-Diaciclovir-5'-diphosphate has been synthesized efficiently from aciclovir 5'-H-phosphonate monoester via a one-pot reaction. This method features easily accessibleH-phosphonate starting material, short reaction time, and good isolated yield.
Ultrasonic-Assisted Deprotection of tert-Butyldimethylsilyl Ethers with Bromotrichloromethane in Methanol
Authors: Sun Jian , Gong Shan Shan , Sun Qi
Published: October 2013

Treatment of tert-butyldimethylsilyl (TBDMS) ethers of nucleosides with bromo-trichloromethane (CBrCl3) in methanol under ultrasonic conditions provides a mild and efficient method for desilylation. The experimental results showed that the employment of ultrasonic could notably improve the reaction efficiency compared with thermal heating condition.
Synthesis of α-L-Rhamnosy-1-Phosphoramidates via H-Phosphonate Monoesters
Authors: Yang Qing Kun , Gong Shan Shan , Sun Qi
Published: October 2013

A series of α-L-rhamnosyl-1-H-phosphoramidates were synthesized by an efficient oxidative coupling reaction of α-L-rhamnosyl-1-H-phosphonate with amino compounds. All these compounds were characterized with NMR, IR, and MS. This method features simple procedures and high yields.
Synthesis and Property of a New Photochromic Diarylethene Bearing a Six-Membered Pyrimidine Moiety
Authors: Liu Hong Liang , Li Xue , Pu Shou Zhi
Published: October 2013

A novel photochromic diarylethene with a six-membered pyrimidine was synthesized to investigate its photochromic behaviors. The compound showed favorable photochromism and functioned as notable fluorescent photo-switches in both solution and PMMA film. The results indicated that the pyrimidine moiety played a very important role during the process of photochromic reaction for the diarylethene derivative. Using this diarylethene1cas optical storage was performed successfully.
Synthesis and Properties Study of 1-(2-cyano-1,5-dimethyl-4-pyrryl)-2-[2-methyl-5-(10-phen-anthrenyl)-3-thienyl]Perfluorocyclopentene
Authors: Li Xue , Song Jun Jie , Liu Gang
Published: October 2013

A new photochromic diarylethene, 1-(2-cyano-1,5-dimethyl-4-pyrryl)-2-[2-methyl-5-(10-phen-anthrenyl)-3-thienyperfluorocyclopentene was synthesized and its photochromic and fluorescent properties were also systematically investigated. The results showed that this compound exhibited reversible photochromic, changing from colorless to blue after irradiation with UV light in both solution and PMMA amorphous film. The fluorescence intensity declined along with the photochromic when irradiation with UV light. However the fluorescence switch in PMMA amorphous film showed more remarkable than in solution.
Synthesis, Photochromism and Application of a Photochromic Diarylethene with a Pyridine Unit
Authors: Wang Ren Jie , Ren Pan Pan , Liu Gang
Published: October 2013

A new unsymmetrical photochromic diarylethene compound 1-[(2-methyl-5-(2-pyridyl)-3-thienyl)]-2-{2-methyl-5-[2-(1,3-dioxolane)]-3-thienyl} perfluorocyclopentene1Owas synthesized. The optoelectronic properties, including photochromism, fluorescences switch and optical recording were investigated in both solution and a PMMA amorphous film. This compound exhibited good photochromism, changing from colorless to purple after irradiation with 297 nm UV light. The new diarylethene also showed remarkable fluorescence switches by photoirradiation in hexane solution. Finally, photo-mode rewritable optical storage using1Cwas carried out successfully.
Synthesis, Photochromic Properties of 1-(2-methyl-5-chlorine-3-thienyl)-2-(2-cyanophenyl) perfluorocyclopentene
Authors: Wei Sha Sha , Sun Feng Xia , Liu Gang
Published: October 2013

An unsymmetrical diarylethene derivative bearing both phenyl and thiophene moieties, in which a cyano group was substituted at the ortho-position of the phenyl ring and a chlorine elements was substituted at the five-position of the thiophene ring, was synthesized. At the same time, its photochromic properties and fluorescence switch were investigated in detail. The results showed that this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in solution , and its absorption maxima were observed at 501 nm in hexane. The fluorescence intensity of diarylethene decreased along with the photochromism from open-ring isomer to closed-ring isomer upon irradiation with 254 nm UV light in hexane.
Synthesis and Properties of 1-(2-methyl-5-chloro-3-thienyl)-2-(2-trifluoromethylphenyl) perfluorocyclopentene
Authors: Xia Shui Jun , Ding Hai Chang , Liu Gang
Published: October 2013

A novel photochromic diarylethene based on thiophene and a six-membered aryl moieties 1-(2-methyl-5-chloro-3-thienyl)-2-(2-trifluoromethylphenyl) perfluorocyclopentene has been synthesized. At the same time, its photochromic properties and fluorescence switch were investigated in detail. The results showed that this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in PMMA film. The fluorescence intensity of diarylethene decreased along with the photochromism from open-ring isomer to closed-ring isomer upon irradiation with 254 nm UV light in PMMA. The fluorescence intensity decreases along with the increase of solution concentration.
Synthesis, Photochromism and Optical Storage of a Novel Diarylethene Compound
Authors: Xu Hong Yan , Ding Hai Chang , Pu Shou Zhi
Published: October 2013

A new unsymmetrical photochromic diarylethene 1a was synthesized and its photochromism were investigated. The compound exhibited good photochromism in solution with alternating irradiation by UV/Vis light, and the maxima absorption of its closed-ring isomer is 542 nm. The open-ring isomer exhibited relatively strong fluorescence at 420 nm. Its fluorescence intensity decreased along with the photochromism from open-ring isomer to closed-ring isomer upon irradiation with UV light.
Synthesis and Application of p-Carboxyarsenazo for Spectrophotometric Determination of Cu(II) in Environment Water
Authors: Gao Lin , Li Yan Hua , Chen Sheng Jie , Chen Fang , Zhang Yuan Fang , Yao Jun Long
Published: October 2013

p-Carboxyarsenazo (CASA) color reagent was synthesized by simple diazotization reaction, and the chromomeric reaction between CASA with Cu(Ⅱ) has been studied by spectrophotometry. In pH=4.6 NaAc-HAc buffer solution, Cu(Ⅱ) reacted with CASA to form a red complex and exhibits an absorption maximum at 614 nm, Beer’s law is obeyed for 0-160 μg/L of copper in solution, the apparent molar absorptivity obtained is 1.57×104 L/(mol.cm), and the relative standard deviation (R.S.D.) is 1.6%. The proposed method exhibited high sensitivity and selectivity for Cu(Ⅱ). The results obtained by this method in the determination of environment water samples were accurate, sensitive and repeatable
Phase-Field Micro-Solidification Simulation for Dendrite Growth in Ni-Cu Binary Alloy
Authors: Hou Wei Zhou , Mao Hong Kui
Published: October 2013

By optimizing the relevant dendrite growth parameters of Ni-Cu alloy undercooling melt, it has studied the effect that the dendrite evolution process of undercooled melt and the degree of undercooling melt have on the dendrite growth of undercooling melt. In the isothermal and non-isothermal solidification condition, relatively accurate result is obtained by applying the phase field method to simulate Ni-Cu alloy. Simulation results show non-isothermal simulation with Neuman boundary condition suit to the actual physical process better.
Study on Application of Vinyl Methyl Ether in MTO Reaction
Authors: Guo Kun Peng , Liu Bo , Jian Gui Xing , Jiang Hong , Duan Wu Biao
Published: October 2013

MTO is the core technology of the coal-to-olefins process. Vinyl methyl ether was added to the reaction feed to investigate the infulence of methoxy group concentration in MTO reaction. Several series of metal-modified ZSM-5 were synthesized to investigate the effect of metal element in the progress methoxy group involved. The reaction results indicated that both the addition of vinyl methyl ether and the metal modification on catalyst led to an increase in C2~C3 olefins yield. The highest C2~C3 olefins yield was obtained using methanol with 5wt% vinyl methyl ether as feed and ZSM-5 with 3wt% Ba modified as catalyst.
Introduction of a New HTHP Permeability Plugging Apparatus for Drilling Fluid Based on Properties of Materials
Authors: Zhao Jian Gang , Zhang Xiao Yi , Li Mei Nan , Shi Kai , Chen Yan Bin
Published: October 2013

This paper has introduced the principle and advantages of a new Permeability Plugging Apparatus(PPA) for drilling fluid working under high temperature and high pressure(HTHP). The domestic status and solution of PPA is also been analysed on properties of materials.
Electrocatalytic Oxidation of Methanol on Platinum-Tin Bimetallic Microparticles Electrodeposited at Nichrome Substrate Electrode
Authors: Chen Ti Wei , Yu Xiao Na , Wang Zhen Hui , Zhang Jian Li
Published: October 2013

A novel Pt-Sn bimetallic spherical microparticles electrode for methanol electooxidation was prepared by electrodeposition technique on nichrome substrate. The electrocatalytic performance of Pt-Sn electrode for methanol oxidation was investigated by cyclic voltammetry and chronoamperometry. The experimental results showed that deposited platinum-tin bimetallic microparticles enhanced the catalytic activity for methanol electrooxidation. Above all, anti-poisoning capability against CO of Pt-Sn bimetallic microparticles electrode was increased in comparision to pure platinum microparticles electrode. Moreover, the cost of preparing catalyst greatly decreased because of reduced dosage of contents of noble platinum on the electrode. This may be a promising electrocatalyst in the direct methanol fuel cells (DMFCs) and other liquid fuel cells field.
Study on Power Generation Expansion Planning Model Based on NOx Total Emission Control and Low Carbon Economy Effect
Authors: Li Yu , Li Chao Ci
Published: October 2013

Acid rain and greenhouse effect are the major air pollution problems in China, and the goals for the total emission control of NOx and total energy consumption control begin to move forward in the 12th five-year plan. NOx emission reduction and energy saving of coal-fired power plants are still put in a strategic position. Accordingly, it is of great significance to carry out power planning work, considering effect of NOx emission index and energy saving on power industry. In this study, a mixed 0-1 integer linear power generation expansion model based on total emission control of NOx and low carbon economy effect is developed for the first time, which can be used for studying the change of power structure, confirming the releasing emissions of NOx from power system for development and reducing energy consumption by total amount control of power coal consumption and CO2 emission growth rate. The model is applied to the power system in Heilongjiang province and the results indicate that the proposed model not only can meet the requirement of power generation expansion management, but also can help the power industry clear the economic impact of NOx emission reduction on self-development and achieve the energy saving target.
A Resonance Rayleigh Scattering Method for the Determination of Trace Benzotriazole Based on Complex Particle
Authors: Ye Ling Ling , Liang Ai Hui
Published: October 2013

In pH 4.2 HAc-NaAc buffer solution, hydroxylamine hydrochloride reduced Cu2+ to Cu+ that coordinate the nitrogen atom of 1,2,3-benzotriazole (BTA) to form Cu-BTA complex particles with a resonance Rayleigh scattering (RRS) peak at 369 nm. Under the selected conditions, when the BTA concentration increased, the RRS intensity at 369 nm increased. The increased RRS intensity ΔI369nm was linear to BTA concentration in the range of 0.17-13.36 µg/mL, with a regression equation of ΔI369nm = 89.91C + 96.7, and the detection limit is 0.17 µg/mL. Accordingly, a new RRS method for BTA was established.
Bioactivity Assay of Chitosan Microspheres Containing Pig Thymosin In Vitro
Authors: Ni Pei , Zhan Rong Rong , Wei Yu Long , Hui Jing , Hu Feng Qing
Published: October 2013

Thymosin, composed of many peptides, is distributed in animal and has immunomodulating effects. However, many factors could affect its bioactivity. Chitosan microspheres containing pig thymosin (CMPT) were prepared through W/O emulsion cross-linking method. In this study, thymosin activity between pig-thymosin and CMPT was investigated through E-rosette test and mouse spleen lymphocyte proliferation (MPLP) experiment in vitro. Results showed that CMPT has the same immunomodulatory activity as pig thymosin. When pig-thymosin was 1.5 μg / ml, E-rosette binding rate was 63%, and E-rosette binding rate of CMPT reached 60%。MPLP rate was 73.3% and 68.5%, respectively. CMPT have the capacity to keep the E-rosette binding and MPLP activity of pig thymosin. This may help to improve traditional formulation and bioavailability of thymosin, and expand its scope of application in clinic.
Study on Biological Materials with Facile Synthesis and Anti-Breast Cancer Activities of Hydroxylchalcones Derivatives
Authors: Jiang Kun , Dong Xin Fei , Lu Xiao Feng , Wang Jun Zhi , Zou Kun , Huang Nian Yu
Published: October 2013

Hydroxylchalcone are known to act on various physiological targets. In this study, a series of nine hydroxychalcones were synthesized via the aldol condensation with the aim of obtaining bioactive small molecules. Their structures were characterized by NMR spectra. The anti-breast cancer activity evaluation indicated the monohydroxychalcones exhibited the better anti-proliferative effect than dihydroxylchalcones against MDA-MB-231 cells, and the compound3bshowed the best anti-breast cancer activities at 18 μM. The bioactive compounds might be used to develop as potential anti-breast cancer agents.
Steam Gasification of Biochar Derived from Fast Pyrolysis for Hydrogen-Rich Gas Production
Authors: Zeng Wei Qing , Zhu Ling Jun , Wang Qi
Published: October 2013

Steam gasification of biochar from fast pyrolysis of biomass was conducted in a fixed bed reactor. The experiments were carried out at temperature of 700, 750, 800 °C with steam flow rate of 0.1 g/min and reaction time of 3 h. The gas products mainly included H2, CO, CO2and some hydrocarbons with low carbon number. The results showed that the conversion of biochar at 700, 750, 800 °C was 68, 78, 96 wt%, respectively, and high gasification temperature favored the production of hydrogen-rich gases. The hydrogen yield increased with temperature rising and reached the maximum of 35.70 mol/kg with a hydrogen concentration of 74 V% at 800 °C.
Effects on the Properties of Polyethylene Film Aging by Different Methods
Authors: Li Chen , Xiao Sheng Ling
Published: October 2013

Aging of plastics occurs in use, it makes the performance degrade, and losing use value finally. In order to compare ultraviolet aging with thermal aging, we carry out a pilot study on the performance changes of PE film. The results demonstrated that the tensile property became lower under two aging methods, the tensile property during the thermal aging decreased by 6.07% but it was 15.08% in the ultraviolet aging at 120h, obviously the effects of the ultraviolet aging on the tensile strength were more significant, it declined faster. The air permeability curves were on the rise under the two aging methods, the results demonstrated that the effect of the ultraviolet aging on the air permeability rose slightly more than the thermal aging. The moisture permeability curves decreased firstly and then increased, but the values of the ultraviolet aging were higher.
The Importance of Reasonable Application of Materials in the Industrial Product Design
Authors: Liu Xin Xiong , Zhao Hai Ping , Gan Lin
Published: October 2013

The material is the main factor for the formation of the entity in the industrial product design. Modeling, colour, etc in the industrial product design are closely associated with the material. With a large number of modern new materials developed by research, the prospect of the industrial product design is broader and the value of industrial products, further enrich and improve. In product design, the designer should follow the principle of practical, beautiful, economy, environmental protection and reasonable use different material, so that the product can not only meet the functional requirements, but also has spiritual value.
Electrochemical Investigation of Triadimenol as Corrosion Inhibitor for Copper in 0.5mol/L H2SO4 Solution
Authors: Li Song Song , He Wei , Tao Zhi Hua , Wang Shou Xu
Published: October 2013

This paper chose triadimenol as a corrosion inhibitor of copper in 0.5mol/L sulfuric acid. The properties of corrosion inhibition were investigated by the polarization measurement and electrochemical impedance spectroscopy (EIS). Polarization curves showed that both cathodic and anodic processes of copper corrosion were suppressed. The inhibiting efficiency increased as the increment of the inhibitor concentration and reached 86.7% at 50 mg/L. The results obtained from EIS measurements are in line with that obtained from potentiodynamic polarization. Finally, a mechanism of inhibition is proposed and discussed.
Effects of Different Ultrasonic Frequency on Total Phenolic Contents of Extracts from Navel Orange Residue
Authors: Cao Qing
Published: October 2013

Effects of ultrasonic parameters (ultrasonic time, temperature and ultrasonic power) under different ultrasonic frequencies including 20, 60, 100 kHz on total phenolic contents (TPC) of extracts from citrus peel (CP) were analyzed. The results showed that TPC of extracts from CP increased significantly with increases of ultrasonic time, temperature and ultrasonic power under three ultrasonic frequencies.
Temperature Analysis of Piercing Process Based on Material Properties in Diescher's Mill with Finite Element Method
Authors: Lu Lu , Cui Hong Xia
Published: October 2013

In this paper, the simulation of the piercing process is performed by the three-dimensional finite-element method in Dieschers mill. The material properties of steel 33Mn2V are introduced. The simulated results visualize dynamic evolution of temperature, especially inside the workpiece. Its show the distribution of temperature on the internal and external surface of the work-piece is non-uniform. The temperature of the internal surface is far higher than that of the external surface of workpiece.
A Quick Sorting Algorithm Adaptive to Massive Data with High Repetition Rate
Authors: Chen Bao Ping
Published: October 2013

Quick sorting is one of the sorting algorithms with good performance. However, there is a bottleneck of its performance in dealing with massive data with high repetition rate. Therefore, a new effective quick sorting algorithm is proposed in this study. This approach possesses the advantage of conciseness of quick sorting algorithms while avoiding the disadvantages of recursive algorithms. The time complexity is O(n), and the space complexity is O(1). Theoretical analysis and experimental data have shown that its performance is superior to the original quick sorting algorithm, and it is applicable to the processing of massive data with high repetition rate.
Preparation of PI Microporous Membrane for Lithium Ion Batteries
Authors: Hu Xu Yao , Wang Yao Wu , Cui Tao , Shang Yu Ming , Zhou Yi , He Xiang Ming
Published: October 2013

Nano SiO2were doped in PI film and then treated with HF solution to get PI microporous membranes. The PI separator was characterized by SEM, thermal shrinkage, AC impendance and charge-discharge experiments. The results show that the thermal performance of PI separator is superior to PP separator and the safety of Lithium-ion battery can be greatly improved.
Synthesis and Capacitance of Multi-Walled Carbon Nanotube/Polyaniline Nanocomposites
Authors: Wang Qi Guan , Zhou Wei , Wang Su Min , Zhang Wen Zhi , Li Jian Ping , Wang Xiao Min , Lu Zhi Yuan
Published: October 2013

We report on the synthesis and electrochemical properties of multi-walled carbon nanotube (MWNT)/polyaniline (PANI) nanocomposites. The MWNT/PANI composite was prepared through electrochemical polymerization and is confirmed by ultraviolet-visible spectroscopy (UV-vis) spectroscopy and Fourier transform infrared (FT-IR) spectroscopy. The MWNT/PANI nanocomposites show a specific capacitance value as high as 463 F/g.
Analysis on Bi-Frequency BUCK Circuit Current Ripple Suppressing
Authors: Li Jun , Zhang Jun Hong , Gao Wei
Published: October 2013

Bi-frequency modulation can effectively solve the contradiction between high frequency and efficiency, but it will bring the problem of the current ripple. In this paper, use Buck circuit as the prototype, adopt phase shift parallel technology, make theoretical analysis and simulation studies on the bi-frequency circuit that the high and low frequencies units are operating in a state of continuous inductor current. Analysis and simulation results show that phase shift parallel can effectively inhibit the output current ripple. aMitsui86425@163.com bZ1960113@VIP.sina.com cdepkia@163.com
Introduction of a Device for Automatic Collection of Potential Data and its Application in Pipeline
Authors: Cao Rui Ying , Xue Zhi Yuan , Chen Hong Yuan , Shuang Kai , Jiang You Wen , Wang Ming Bo
Published: October 2013

The pipeline cathodic protection monitoring was used in potential test of cathodic protection in pipeline. The test period was last 1 or 2 months or longer. the measurement accuracy and reliability of testing data are affected by testing environment and the accuracy of the instrument in some ways, so in order to meet the requirement of cathodic protection potential monitoring, it is necessary to design a cathodic protection potential acquisition system to realize the automatic monitoring of cathodic protection potential, the system was an automatic acquisition pipeline potential device used in buried steel pipeline environment. The internal circuits of the device used single chip design of low power consumption and are high precision DC voltage and AC voltage effective value measurement device all based on AVR MCU, combining hardware with software, the results show that the system realizes the automatic acquisition of buried pipeline potential and completes the indicators in China.
Research on NLOS Mitigation Method for TOA Positioning
Authors: Deng Zhong Liang , Zhao Xiao Hong , Xie Fei Peng , An Qian
Published: October 2013

In Time of Arrival (TOA) positioning technology based on base station (BS), besides the measurement error caused by mobile station (MS), Non Line Of Sight (NLOS) propagation become the main factor of the positioning error. Aiming to solve this problem especially in indoor positioning, we introduced the differential calculus method to linearize the positioning equations, and Mirror Image Method (MMI) to turn the NLOS propagation into LOS propagation, then we collected a small amount of feature point information in the positioning region which include the received TOAs at this point, feature point coordinates and BS coordinates or the mirror image coordinates of BS. In the following 3D scenario simulation, we took use of the differential calculus as well as Least Square (LS) method to get the position of the MS. Simulation results show that by using the whole mechanism, we can achieve a high positioning precision.
Impact of the Phosphors on the Conformal Coating LED by Optical Simulation
Authors: Gong Yu Bing , Tian Ruan Ji
Published: October 2013

The conformal coating phosphor converted light emitting diode (LED) is one of the important high power white LED. The thickness, concentration and concentration distribution of the phosphor layer has a critical influence on the LED optical performance. Previous literature mainly focus on the luminous flux of the LED. Few are involved with the relationship between the concentration and the correlated color temperature (CCT), and angular color uniformity (ACU) of LED. Based on the ray-tracing simulation, the luminous flux, CCT and ACU affected by the phosphor thickness, concentration and concentration distribution were obtained and studied. The results provide effective references for the phosphor coating process design and optical performance analysis of conformal coating LED.
The System for the Intelligent Remote Control of the Lead-Acid Battery
Authors: Tong Xu Feng , Bao A Ru Han , Yang Lei
Published: October 2013

Aiming at the current maintenance of the lead-acid batteries on CDMA bases, this paper analyses the main reasons for the battery failure and puts forward the system for the remote monitoring and control of the battery. It introduces the parameters about the battery current, voltage and temperature as well as the power relay working theory. Furthermore, the remote monitoring platform is developed to monitor the battery working states in real time. With the data analyzed, the automatic control will get started to charge/discharge the battery. The system can prolong the working life of the lead-acid battery effectively and improve the battery maintenance efficiency so as to reduce the maintenance cost.
A Remote Measurement and Control System Architecture Based on Embedded B/S Structure Using AJAX-CGI
Authors: Zhao An Bing , Sun Jie , Bai Ming
Published: October 2013

With the development of Internet technology and embedded technology, the network measurement system is becoming a new trend of measuring technology. This paper described a remote measurement system in Browser/Server (B/S) structure and the embedded design, hardware structure and software. The measurement experiment is already set up and some parameters tested is given. In this remote measurement and control system, LM3S8962, the microprocessor is used, and RL-ARM is used as the operating system, and CGI and AJAX technologies is also introduced to enhance performance.
Fuzzy Passivity Control of Flexible Joint Robot
Authors: Zhang Bin
Published: October 2013

This paper researches a fuzzy control method for passive flexible joint robot. Stability control method applying T-S fuzzy model is employed for single-link flexible joint robot. T-S fuzzy model is used to approximate the flexible joint robot firstly, and then fuzzy controller is developed based on the principle of parallel distributed compensation. The fuzzy controller is also applied to the passive properties of model error. The stability conditions are proposed by Lyapunov function and linear matrix inequalities are also applied to solve the controller parameters. Simulation results show that the proposed method of application value.
Pyrolysis Characteristics Research of Waste Plastics of Electronic Waste
Authors: Lv Wei , Shao Xian Tao , Li Deng Xin
Published: October 2013

This paper selects the waste plastics of two typical electronic components of the computer circuit board, which are parallel communication port and slot, the influences of different heating rates and components on the pyrolysis and their kinetics analysis are researched. Pyrolysis experiments are performed under a nitrogen atmosphere, the experimental temperature ranges from room temperature to 1000°C, and heating rates are 10°C / min and 20°C / min. The result shows that the plastics of parallel communication port and slot in the weight loss have similar variation trend, and with the changing of heating rates, the temperature that reach the maximum pyrolysis rates also change. The weight loss rate of slot is lower than the parallel communication port. The pyrolysis rates increase with the increasing of the heating rates, the remainder mass fraction of the same samples are basically the same under different heating rate.