bluuebunny/crossref_metadata_2025 huggingface dataset:
The Influence of Donor-Doped Concentration on the PTCR Characteristics of the Ban-xSmxTiO3 Based Ceramics Sintered in Reducing Atmosphere
Authors: Cheng Xu Xin , Zhou Dong Xiang , Zhao Zhao Xiong , Fu Qiu Yun
Published: January 2014

Positive temperature coefficient of resistivity (PTCR) effect and electrical properties of (Ban-xSmx)TiO3(BSMT ) samples with different Ba-site/Ti-site ratio (n) and various concentration of the donor-doped Sm3+(x) sintered in a reducing atmosphere and reoxidized in air are investigated. The results show that the room temperature resistivity (ρRT) of the semiconducting BSMT ceramics first decreases and then increases with increasing of concentration of the donor-doped Sm3+, especially whenxis 0.005 mol, the ρRTof the BSMT ceramics is the lowest. Moreover, the ρRTof the Ba-excess BSMT (n= 1.01) specimens reoxidized at 800 oC for 1 h after sintering at 1270 °C for 30 min in a reducing atmosphere is lower than the Ti-excess ones (n= 0.99), in addition, the ρRTof the BSMT specimens increases with an increase of both sintering temperature and reoxidized time.
Preparation of Graphene Oxide Based on Expanded Graphite
Authors: Liu Li Lai , An Mao Zhong , Xing Shan Chao , Shen Xiao Jun , Yang Chen , Xu Xin Long
Published: January 2014

Graphene oxide with high degree of oxidation and peelable has been prepared by two-step oxidation method used large flake graphite. The expanded graphite was prepared firstly and then prepared graphene oxide via further oxidation. The influence of oxidation time, oxidant dosage and high temperature reaction on the structure and degree of oxidation were studied. The morphology and structure of graphene oxide were characterized by X-ray diffraction, fourier transform infrared spectra, scanning electron microscope and transmission electron microscope. It was found that high degree of oxidation and large specific surface area graphene oxide was prepared at the ratio of sulfuric acid and expanded graphite was 75 mL : 1 g, the ratio of potassium permanganate and expanded graphite was 4 g : 1 g and the oxidation time at 35 °C was 24 h. This technology is simple without high-temperature reaction process, and solved the problem of low oxidation efficiency when used the large flake graphite as raw materials.
PPy/Cotton Fabric Composite Electrode for Electrocardiogram Monitoring
Authors: Zhou Yun , Ding Xin , Hu Ji Yong , Duan Ya Ru
Published: January 2014

Textile-based electrodes are a potential choice for wearable and continuous monitoring of electrocardiogram measurements. In this paper, we present a novel composite textile electrode for ECG measurement. We chosen cotton jersey knit fabric as the substrate. Based on the substrate, polypyrrole (PPy) was coated chemically only and plated chemically electrochemically successively, respectively, to form PPy/cotton fabric composite electrode. The obtained results suggest that, first, both the composite electrodes can measure the ECG signals including P-waves, QRS complex and T-waves clearly, second, both the composite electrodes are poorer frequency dependence than Ag/AgCl electrode, and the one deposited chemically only is the poorest, whats more, the composite electrode deposited chemically only obtains the highest signal to noise ratio (SNR).
Synthesis of Calcium Peroxide Microparticles and its Application in Glyphosate Wastewater Pretreatment
Authors: Zhai Jian , Jiang Chun Hua
Published: January 2014

The calcium peroxide microparticles were synthesized and evaluated as an innovative oxidant to pretreat glyphosate wastewater. The CaO2 microparticles were 0.1-0.3 μm in diameter and the average CaO2 content was 80%. Experiments were performed to investigate the influence of m(CaO2 :CODCr), n(CaO2:FeSO4·7H2O), pH and contact time of solution on the removal efficiency of TP and CODCr. Under the optimal condition (m(CaO2 :CODCr) =1:1, n(CaO2:FeSO4·7H2O)=4:1, pH=3.0,contact time =30min), the removal efficiency of TP and CODCr reached 94.2% and 62.1% respectively. These results suggested that CaO2 microparticles may be used to develop a simple and efficient pretreatment method for glyphosate wastewater.
Synthesis of Loaded Silver 4A Zeolite Molecular Sieve with Magnetic Cores of SiO2/(γ-Fe2O3- SiO2) for Demercuration
Authors: Qiu Yue Qin , Jia Lei
Published: January 2014

It is an effective solution to the problem of agglomeration using the magnetic composite SiO2/(γ-Fe2O3- SiO2) instead of traditional magnetic particles Fe3O4as the core of molecular sieve. The traditional hydrothermal method was utilized by means of adding the magnetic composite particles SiO2/(γ-Fe2O3- SiO2) into the pre-made crystallization liquid. Then, a series of magnetic 4A zeolites with varying contents of SiO2/(γ-Fe2O3- SiO2) were synthesized under the condition of ultrasonic crystallization for 6 hours with the power of 100W and temperature of 70 °C . Afterwards, the characterization tests such as XRD,SEM,TG,IR were carried out; the final result showed that the performance of 4A zeolite molecular sieve with SiO2/(γ-Fe2O3- SiO2) is basically identical with the pure 4A zeolite molecular sieve. The absorption rate was 13.5927μg/g by using the 4A zeolite molecular sieve with SiO2/(γ-Fe2O3- SiO2) for the absorption of mercury. Key words: 4A zeolite molecular sieve; magnetic composite; silver loaded;Demercuration
Corrosion Behavior of Rare Earth Cerium Based Trivalent Chromium Conversion Coating on Zinc
Authors: Miao Shu Ting , Han Sheng , Hao Lifeng
Published: January 2014

The present paper focused on the use of the salt of rare earth cerium as corrosion inhibitor of Zinc by using cathodic electrolytic passivation method. The corrosion resistance and the microphology of the cerium passivation film were studied by the methods of electrochemical method, scanning electron microscopy (SEM). From the results, it was shown that good corrosion resistance of cerium-based trivalent chromium conversion coating was obtained when the compositions were as follows: Ce (SO4)2, 6g/L; Cr2(SO4)3, 18.9g/L and NaNO3; current density, 2A/dm2; temperature, 40 oC; time, 60s. SEM revealed that the cerium trivalent chromium conversion coatings formed uniform cerium hydroxide and chrimuim hydroxide deposition on the surface of Zinc.
About Research of Ramic Concrete Strength and Thermal Performance
Authors: Chen Ming , Ji Xiao Meng , Ma Yue
Published: January 2014

The sludge, dredging silt and other materials prepared by mixing the ceramic, studying the effects of different sludge ratio, sintering temperature, the amount of excess sludge moisture content on ceramic, pile density, ignition loss rate. Produced ceramic concrete specimens tested by experiment and standard ceramic concrete specimens concrete specimen strength and thermal conductivity. Test specimen obtained ceramic concrete compressive strength of 13.57MPa, mixing concrete block compressive strength of 13.96MPa; gravel concrete specimens of thermal conductivity 0.394, ceramic concrete specimens thermal conductivity of 0.387. The results show that adding the ceramic concrete, ceramic concrete strength of certain decline, but the performance is enhanced thermal insulation, thermal insulation properties can greatly enhance it.
The Magnetic Performance of the Particles of Steel Slag Powder
Authors: Zhang Bo , Hu Jin
Published: January 2014

The magnetic performance of steel slag is special because it has a high content of Fe2O3. In this study, the difference of chemical compositions, mineral compositions, and particle size distributions between the two parts of steel slag by magnetic separation was investigated. The results show that the difference of chemical compositions especially the main oxide contents between the two parts of steel slag by magnetic separation is very small. And the difference of mineral compositions between the two parts of steel slag by magnetic separation is also very small. However, the particle size distributions of the two parts of steel slag by magnetic separation may differ from each other when steel slag contains many coarse particles.
Heat Transfer Analysis and Energy-Saving Methods of the Exterior Windows in the Northern Area
Authors: Wang Zhong Hua
Published: January 2014

In this paper, ways of heat transfer through windows and doors between the indoor and outdoor environment in the northern area are summarized. And every heat transfer way is described by mathematical formula. On this basis, methods to improve the energy saving performance of exterior windows are put forward according to factors affecting heat transfer through windows. The first method is increasing solar radiation heat, and then reducing heat loss by infiltration, and increasing the thermal resistance as much as possible. Ideal form of energy-saving window is proposed based on compared windows with different material and thermal resistance.
Investigation on Mechanical Properties and Microstructure of SSM 356-T6 Aluminium Alloy by Diffusion Bonding
Authors: Meengam Chaiyoot , Muangjunburee Prapas , Chainarong Suppachai
Published: January 2014

SSM 356-T6 aluminium alloys generally present low weldability by fusion methods because of the sensitivity to weld solidification cracking, porosities, change microstructure in weld zone and other defects in the fusion zone. Diffusion bonding can be deployed successfully with aluminium alloys. This paper presents the technique to conserve the globular weld structure of SSM 356-T6 aluminium alloy. The effect of joining parameters on the microstructure and mechanical properties of diffusion bonding butt joints of semi-solid metal 356-T6 aluminium alloy were investigated by conditions as follows: contact pressure at 0.4, 0.9, 1.8, 2.4 and 2.7 MPa, for 3 hours holding time and temperature at 495°C under argon atmosphere at 4 liters per minute. The results showed that condition used contact pressure 2.4 MPa, with 3 hours holding time and temperature at 495°C, under argon atmosphere provided. The highest joint strength reaching to 182.2 MPa, which had joint efficiency of 61.34 percents compared with base material. In addition, microstructure in welded zone after welding is still in globular structure, but the grain size was increased when the higher bonding temperature was used. The results of this investigation have shown that an average hardness is around 121.2 HV.
Cellular Automata Simulation of Grain Growth in Magnesium Alloy Heat Affected Zone of Laser Melt Injection
Authors: Zhao Ming Juan , Deng Zhi Cheng , Zhao Long Zhi , Zhang Jian
Published: January 2014

Based on the cellular automata (CAs) method of Moore neighbor type, a model of simulation for grain growth processes in magnesium alloy heat affected zone of laser melt injection was established. The results show that the grain growth process can be simulated very well by the CAs method, the shapes of grains tend to be hexagonal, the small grain is annexed by large grains, the grain growth index can be obtained as 0.42, and the topological feature reflected by the established model is accord with the physical mechanism of the grain growth. The cellular automaton (CA) method is proved to be a simple and effective approach for the grain growth simulation.
Design of Lead-Free Solders and Pollution Control of Lead
Authors: Gan Gui Sheng , Du Chang Hua , Li Chun Tian
Published: January 2014

Due to increase refined lead production and slow industrialization of lead-free solders, hazard of lead to human and environment still existed. Based on pollutions of lead depending on the volatility and the solubility of lead, the new ways to prevent and reduce the pollution of lead were put forward. The lead content in lead-solders could be reduced appropriately and the dense surface film could be formed by micro-alloying in the view of material for reducing the pollution. Low soldering temperature and the optimal soldering process or equipment could also be taken to reduce the pollution of lead.
Numerical Optimization of the Parison Thickness of Oil Drum in Extrusion Blow Molding
Authors: Wang Jian , Peng Jiong , Chen Jin Nan , Li Jing
Published: January 2014

The optimization parison thickness can reduce the oil drum weight and meet the requirement of the minimum thickness. The profile thickness of the extruded parison can be optimized by simulation. Under different blowing pressures, extrusion blow molding non-isothermal process of the high density polyethylene oil drum with a handle was simulated by using Polyflow. The initial parison was respectively divided into 11, 51, 101 and infinite segments. After seven optimizations, the oil drum wall thickness was equal or larger than 2 mm. An appropriate inflation pressure of 0.6 MPa was obtained. The results show that the production efficiency increases with the inflation pressure increasing. With the parison segments increasing, the oil drum thickness distribution inflated from the optimized parison is more uniform and approaches to the required thickness. The oil drum mass is decreased with the segments increasing. It is necessary that the non-uniform thickness parison was produced by injection molding.
The Effect of Welding Materials on 1Cr18Ni9Ti and 2Cr13 Steel Welding Joints Fracture Microstructure Pattern
Authors: Zhang Shao Hui , Zhao Yong Tao , Zhou Jun Wei
Published: January 2014

By method of TIG, two kinds of welding materials were filled in, under certain welding craft conditions，1Cr18Ni9Ti and 2Cr13 were welded. By OM(ZEISS)、SEM，the microstructure of two kinds of 2Cr13 and 1Cr18Ni9Ti welding joints were observed and analyzed, by electronic universal tensile machine，mechanical properties of welding joints were measured. The results show that 2Cr13 and 1Cr18Ni9Ti welded joints is typical columnar crystal, the microstructure is lath martensite +residual austenite + carbide，the welding joints filled in two kinds of materials， rupture forms are toughness rupture; Elongation and tensile strength of welding joint filled in 308 welding material is better than that filled in H1Cr21Ni10Mn7Mo welding wire.
Laser Glazed Color Surface on Whiteware
Authors: Fan Ji Wei , Chao Ming Ju , Jiao Zhi Qiang
Published: January 2014

Traditional procedure of firing glaze is usually time consuming, energy costly and not environmental friendly. This paper reports the result of laser glazing on whiteware, and compares the glossiness and chromaticity of the glazed color surfaces by using a spectrophotometer. The cobalt blue and cobalt black color glaze surfaces are prepared by either traditional firing or laser glazing. Study shows that laser glazing is practicable, the resultant color glaze surface has better glossiness but the chromaticity is slightly weaker than that processed by traditional firing. The method of laser glazing is simple, can save energy, and worth to study further.
Energy Grade Analysis of Liquefied Natural Gas Cold Energy Utilization
Authors: Si Hong Yu , Sun Kai , Mei Ning , Xu Min , Chen Lei , Zhang Xiao Dong
Published: January 2014

To increase the utilization efficiency of LNG cold energy, this paper analyzes LNG regasification process basing on energy-grade analysis. The result shows that comprehensive utilization both of doing work and heat transfer is the most efficient. Moreover, this paper proposes a chart to select a suitable cold energy utilizaiton way.
Study on the Mechanical Property of Ramie Fiber in Different Temperature
Authors: Cao Gen Yang , Xiao Xin Fang , Xu Wei Lin
Published: January 2014

Ramie fiber is known as "China grass". In this paper, Ramie was treated in the experiment of high temperature, low temperature, high and low temperature conditions. The results show that the high temperature affects the strength and breaking elongation obviously for ramie fiber. Low temperature and high & low temperature cycle does not affect much on the strength and breaking elongation.
Kinetic Study on Sulfuric Acid Dissolution of NaxH2-xTiO3 from Sodium Hydroxide Molten Method
Authors: Wang Wei Jing , Xue Tian Yan , Wang Dong , Qi Tao
Published: January 2014

The dissolution kinetic of NaxH2-xTiO3(resulting from high titanium slag treatment by NaOH) by diluted sulfuric acid (38~51 wt. %) was carried out in temperature range of 10 to 50°C with an initial acid/NaxH2-xTiO3(wt.) ratio of 1:1. The effects of the sulfuric acid concentration and temperature on titanium dissolution percent were reported, and both of them significantly affected the dissolution rate. The experimental data indicate that the shrinking core model controlled by diffusion in product layer is most applicable for the titanium dissolution process, and the apparent activation energy has been estimated to be 28.69 kJ/mol.
Study on Formation of Bottom Dross in Hot-Dip Zn-0.1%Ni Alloy
Authors: Luo Gong , Wang You Bin , Zeng Jian Min , He Huan , Yan Jia Lin , He Cui Yun , Zhang Rui , Li Shi Ning
Published: January 2014

The composition, microstructure and formation mechanism of the bottom dross in hot-dipping Zn-0.1%Ni alloy bath have been investigated through XRF, XRD and SEM. It is found that the bottom dross is an aggregation consisting of FeZn13(ζ), FeZn15and a small amount of Ni3Zn22. The formation mechanism of bottom dross can be described that loose ζ phase formed on the steel substrate and then flakes off from substrate; ferroalloy is formed and precipitated from the melt with diffusion of Fe into molten zinc if the dissolved Fe surpass its solubility in the molten zinc. It also indicated that there exists a trace of Ni in the bottom dross in hot-dipping Zn-0.1%Ni alloy bath.
Thermodynamics Study on the Disproportionation of AlCl in Vacuum
Authors: Feng Yue Bin , Yang Bin , Dai Yong Nian
Published: January 2014

The disproportionation of AlCl was investigated by thermodynamics analysis. The results demonstrated that Gibbs free energy change of the disproportionation of AlCl decreases with decreasing temperature and increasing the AlCl pressure. The onset temperature of the disproportionation is 1521K in the standard atmosphere, and those are 878K and 1096K, respectively, at the AlCl partial pressure of 5Pa and 200Pa as the AlCl3partial pressure is 200Pa. The AlCl equilibrium partial pressure is about 10-4Pa at 500K, demonstrating that the disproportionation of AlCl is complete below this temperature. The temperature in the condenser used in the experiments was below 1200K and the top near to the water-cooled cover of the furnace should be below 500K, therefore the disproportionation of AlCl occurred and was completed in the condenser.
Microstructure and Property of Plasma Sprayed TiB2 Wettable Coatings on Carbon Cathodes
Authors: Peng Ru Zhen , Xie Gang , Hou Yan Qing , Tian Lin , Yu Xiao Hua
Published: January 2014

In this work, fine-lamellar structured TiB2 ceramic wettable cathode coatings were deposited on carbon cathodes of aluminium oxide reduction cells by atmosphere plasma spraying (APS). Cathode carbon blocks consisting of coatings 800 μm thick of plasma sprayed TiB2 finepowder on carbon substrate were fabricated. In order to investigate the results of coating, the microstructure and phase composition of the wettable cathode coating were characterized by scanning electron microscopy (SEM). It is found that TiB2 fine-powders were partly oxidized during the plasma spraying process. The coating was mostly formed by a matrix of fully molten particles where the presence of semi-molten feedstock agglomerates. The APS method is believed to be a good choice to deposit TiB2 wettable cathode coating with high performance and reliability.
Geologic Feature of Shilipo Copper Deposit in Xinjiang
Authors: Liu Yun Feng , Hou Yu Shu , Shan Xu
Published: January 2014

The Eastern Tianshan is a type of mineralization belt, Shilipo copper, deposit is new discoveried one at Eastern Tianshan, bearing in maroon basaltic tuff. Some basalt shows red color, which has certain similarity to hematite mineralization development in the Jiweinuo copper deposit. From geochemical characteristics analysis, it is proven that the formation of Eastern Tianshan copper relates to the mineralization of the mantle plumes. That only the Emeishan basalt in Sichuan Province contains the copper in China, which shows the preliminary scale was reported and after that, caused the heated debates. The most thought that the copper has the relation to the mantle plumes. Similar deposit was reported in America as well, such as the Jiweinuo Cu deposit in Subilier Lake. Such make us consider if the formation of the belted copper deposit in Dongtianshan has the relation to the mantle plumes. For confirm this result, we respectively chose two basalt samples from Shilipo and Heilongfeng mineral occurrences in order to analyze their constant, trace and rare earth element content and preliminarily research their geochemical characteristics.
Application of Reservoir Geological Modeling in the Wang Longzhuang Block
Authors: Chen Shuang Yan , Xie Jun , Zhou Ju Biao , Ding Yu Sheng , Cui Xiao Hui
Published: January 2014

Wang Longzhuang Block has entered the middle or later stage of high water cut and high recovery, quantity of remaining oil still remain in the reservoirs. The paper establishes the fine three-dimensional geological modeling on the basis of reservoir description of Wang Longzhuang Block, including the structure modeling, sedimentary microfacies modeling, reservoir parameter modeling and liquid distribution modeling, which forming the fine reservoir description of three dimensional visualization, and those provide evidences for the studies of the distribution of remaining oil in Wang Longzhuang Block.
Synergic Surface Magnetization of Siderite on Hematite
Authors: Wu Xi Qing , Dai Liang , Dai Chuan , Cheng Zheng , Yi Long Sheng , Liu Xiao Qi
Published: January 2014

The surface magnetization without adding any iron-containing substance as a magnetic seed is called self-magnetization. Tests show that temperature and pH of the slurry are two important factors in the self-magnetization of siderite and its synergic effect on hematite; that the self-magnetization took place on siderite but did not on hematite while a synergic effect of surface magnetization, i.e. the promotion of surface magnetization of hematite in the presence of siderite, appeared in the mineral mixtures or real iron ore containing hematite and siderite. The infrared spectra indicate that there is Fe3O4 generated on the surface of siderite in the process of self-magnetization; the measurement of VSM confirmed a significant change in magnetic hysteresis loops and increase of the saturated magnetization after hematite was magnetized by Fe2+ in the slurry; and SEM observed the adsorption of Fe3O4 species on the surface of hematite, which is generated originally from the siderite in an alkaline slurry, resulting in the synergic effect of siderite on hematite .
Rapid Analysis of the Bisphenol a in Slips of Store Receipts and ATM Machine with Head-Space Liquid-Phase Micro-Extraction Coupled to Gas Chromatography and Mass Spectrometry
Authors: Yu Ying
Published: January 2014

A novel method has been developed for the determination of bisphenolA in slips of store receipts and ATM machine by head-space liquid-phase micro-extraction (HS-LPME) coupled with gas chromatography-mass spectrometry (GC-MS). The variable experimental conditions for the HS-LPME extraction process were optimized. The optimal conditions were using 2ul of toluene as organic solvent drop, 0.5g of the amount of sample and 1.0cm of the depth of micro-drop from the surface of the sample. After extracting for 10 min and detection limit of 1-100mg·L-1. Detection limit (3 S/N) of the method was found to be 0.3mg·L-1, precision and recovery of these methods were tested giving values of RSDs (n=6) less than 4.49%; and of recovery in th range of 98.80%-99.47%. The method shows advantages of simplicity, high sensitivity and high performance extraction to be in line with the analytical standard of the international organic pollutant.
Experiment Research of Luming Molybdenum Mine Rock Physical and Mechanical Properties
Authors: Zhang Ying Hua , Zhao Bo Chuan , Ye Zhou Jing , Huang Zhi An , Gong Ming Shan
Published: January 2014

Physical and mechanical properties of rocks are the fundamental factors affecting the slope stability, the rock physical and mechanical properties of the Luming molybdenum mine were tested and analyzed in the laboratory. The results can provide us the basic data and reference to do numerical simulation and physical simulation of slope stability. The experimental results showed that: the greater the depth of rock of Luming molybdenum mine, the greater the density becomes,so as the freeze-thaw coefficient; the rock strength complies with the general rule; uniaxial tensile strength of dried rocks is much larger than water-saturated rocks; various rocks compressive strength σ3 rose up with σ1 rising; the shear strength of the rocks containing weak structure surface is far less than the shear strength of the intact rocks.
The Quantum Research on the Nucleophilic Reaction Activity of Polycyclic Aromatic Hydrocarbons
Authors: Zhao Jin Ling , Han Qing Zhen , Jiang Zhao Tan , Wen Hao
Published: January 2014

Using the Hartree Fock (RHF) method, we study the most reactive carbon atoms in the polycyclic aromatic hydrocarbons (PAHs). In order to identify the most reactive carbon atoms, the Mulliken charges and the Mayers bond orders were calculated as the criterion. The results demonstrate that the most reactive carbon atoms appear at the locations of the outer C in the inner benzene rings for cata-condensed PAHs, while for peri-condensed PAHs they are the outer C in the outer benzene rings。
The R&D of the Emergency Rescue Vehicles Based on Borehole-Type Refuge Chamber
Authors: Huang Zhi An , Wang Xin Tong , Zhang Ying Hua , Gao Yu Kun
Published: January 2014

So far, the control rooms require a lot of manpower and material resources to repair and maintenance. They are above the borehole-type refuge chamber. It is also possible that the equipment in control rooms is aged and the necessities are overdue. When an emergency appears, it can detain the rescue. Therefore, a kind of emergency rescue car for permanent drilling shelters is developed. It can replace the control room. It combines with relevant regulations, through counting, based on the conditions of mines affiliated to Jizhong Fengfeng Energy Group. The air supply system, the power supply system, the flow food system and the communication system of monitoring and controlling are designed in the car. After conducting laboratory experiments, the model of appropriate emergency rescue car, the types of functional equipment are determined. The layout and connections of each system are also designed in the car. These are based on the data and theories concluded from theoretical analysis.
Projection Pursuit Regression Based on Hermite Polynomial for Atmospheric Corrosion Data Application
Authors: Nie Wei Dong , Wang Xiao Ming , Li Zhao Na , Li Xin Geng
Published: January 2014

A Projection Pursuit Regression method by using Hermite Polynomial is put forward to make modeling and forcasting of corrosion data, because of small sample of acumulation data of metal material corrosion in atmosphere, Multi-dimensional Properties and Non-orthogonality of influence factors. Analyses and prediction of atmospheric corrosion data of a metal are made by using this method. Compared with PCA+SVM method, this method improves significantly the accuration of prediction and correctness of corrosion vehavior trend. The result proves that the Hermite Polynomial Projection Pursuit Regression method has great huge advantage in data analysis of steel corrosion in atmosphere.
An Electromagnetic Parameters Measuring System Based on a Concave Cylindrical Cavity
Authors: Chen Xian Yan , Liu Xing , Ye Long Fang , Li Xue Yi , Xiao Fen , Liu Qing H.
Published: January 2014

In this paper, an electromagnetic parameters measuring system based on a concave cylindrical cavity is presented. The concave cylindrical cavity resonator mode is with separated electric field and magnetic field distribution region, which is not observed in other cavities. It is shown that permittivity and permeability can be tested by placing samples in the strongest electric field region and magnetic field region, respectively. Therefore, by using this measurement system, the electromagnetic parameters of microwave absorbing materials can be accurately characterized.
Research on a Ultrasonic Detection Method about Disfigurements of Press Roll
Authors: Yan Zhen Rong , Si Jun , Luo Xiao Ming , Hou Huai Shu
Published: January 2014

To detect the disfigurements of the press roll, the dual-crystal longitudinal wave transducer and dual-crystal creeping wave transducer are applied in this study. With the help of the machine driven system and rotary encoder, the automatic ultrasonic detection of the press roll is realized, and the test results indicate that the detection system is reliable so that the press roll quality can be assured.
Non-Destructive Characterization of Welding Defects Using MMM and ACFM Methods
Authors: Gao Ya Tian , Wang Li Hua , Miao Xiu Jie , Leng Jian Cheng
Published: January 2014

Nondestructive inspection and evaluation of welds is very important to ensure the safety of industrial products. In this study, the metal magnetic memory (MMM) and alternating current field measurement (ACFM) methods are utilized to characterize welding defects of a butt welded tubular specimen respectively. The results show that the MMM method has potentials in evaluating both early stress concentration and macro-defects but only qualitatively, while the ACFM method can provide crack depth sizing information quantitatively, suggesting that the two methods should be combined for nondestructive evaluation welding defects to improve the detection efficiency and accuracy.
Numerical Simulation of Projectile Material Phase Transformation during Penetration
Authors: Wang Jiang Bo , Zhang Qing Ming , Xu Gui Ying , Feng Cheng Liang
Published: January 2014

It was found from the experiment that the high temperature caused by target impact led to projectile austenite phase transformation. Based on this finding, a phase transformation model was established and verified by experiments, which proved the model had a relatively high calculation precision. Then, the model was used for numerical simulation. The result showed that the phase transformation zone was at the projectile head surface and the area increased as the impact velocity increased. The critical impact velocity which would cause phase transformation and affect projectile performance was around 700m/s.
Density Functional (B3LYP)and the Second–Order Møller–Plesset (MP2) Theoretical Method Investigate the Geometric Configurations of the D…CO (D=He, Ne, Ar, Kr and Xe) Complexes
Authors: Yuan Kun , Zhu Yuan Cheng , Liu Liu
Published: January 2014

Density functional (B3LYP)and the second–order Møller–Plesset (MP2) theoretical method with differentbasis sets are used to investigate the geometricconfigurations of the D…CO (D=He, Ne, Ar, Kr andXe) complexes. The results showed that C end of the CO molecule can close and interact with D atom and formstable van der Waals complex, so does the O end of the CO molecule. It issuggested that the interaction between CO and D atom is not electrostaticinteraction in nature. The harmonic frequency analysesand Mulliken charge distributions of five complexes were performed at the MP2/aug-cc-pvtz/DGDZVPlevel.
The Research for Introducing Gem-Difluoromethylene Group into the Organic Molecules
Authors: Fang Chao , Wu Fan Hong
Published: January 2014

The article mainly argues with the latest progress of methodologies which is the introduction of a difluoromethylene unit into the organic compounds. It will also summarize the theoretical study of introducing gem-difluoromethylene group into the organic molecular. Firstly, it briefly reviews the function of difluoromethylation reaction; secondly, we start to study the recent development of introducing a CF2group in the organic synthesis. At last but not the least, we conclude the use of the new CF2unit in the syntheis of the molecular.
Synthesis, Characterization and Photophysical Properties of CuI Complexe with 7,10-Dimethyl Pyrazino [2,3-f][1,10]phenanthroline
Authors: Li Qiang , Liu Wen Qu , Zhao Feng
Published: January 2014

In this paper, a diimine compound of 7,10-DimethylPyrazino[2,3-f][1,10]phenanthroline (dppl) and its corresponding phosphorescent Cu complexes were synthesized and characterized by 1H NMR successfully. Experimental data confirm that Cu Complex is high-energy-emitting one. The broad band emission upon excitation at λ = 440 nm with the emission maximum locates at λ = 566 nm was observed. This makes them potential candidates as cheap emitting materials.
The Catalyzed Synthesis of Prenyl Alcohol in Anhydrous System
Authors: Ruan Fu Xian , He Zhi Peng , Song Hong Lang , Huang Ke Lin , Hu Jing , Peng Xiao Yu , Yu Hui Qun , Liao Dan Kui , Sun Guo Song , Huang Shi Yong , Wei Zhi Ming
Published: January 2014

In this paper, the prenyl alcohol was catalyzed synthesized in anhydrous system by using isoprene and dichloroacetic acid as raw material and sodium dichloroacetate as catalyst. The obtained product was mainly characterized by FT-IR and GC. Furthermore, the olefine acid ratio, reaction time, amount of catalyst, saponification time and NaOH concentration were systematically investigated during the work. The optimum reaction conditions are as follows: the olefine acid ratio was 1:2, reaction time was 2h, amount of catalyst was 1.8g, saponification time was 2h and NaOH concentration was 4mol/L, the yield of prenyl alcohol was 45%.
Screening of Formulation for 5% Hexaflumuron Suspension Concentrates
Authors: Zhang Bao Hua
Published: January 2014

The formulation of 5% Hexaflumuron suspension concentrates (SC) was optimized. Results showed that the optimum formulation consists of 5% Hexaflumuron, MF-5 1%, DISPERSE 1005 5%, Aluminum magnesium silicate 1.9%, 0.1% Xanthan gum (concentration is 2%), and 5% ethylene glycols, and water make up 100%. The product has good suspension stability and storage stability.
Study of the Performance of the Cobalt Based Catalyst on Different Supports for Fischer-Tropsch Synthesis
Authors: Ye Wan Li
Published: January 2014

With cobalt-based catalyst loaded by Al2O3, TiO2 and ZrO2 as research objectives, in this paper, the performance of these cobalt-based catalysts in Fischer-Tropsch synthesis is discussed. Besides, BET, XRD, FTIR, TPR superficial characteristics and evaluation experiments have been carried out for these catalysts respectively, and the result shows that, the catalyst loaded by ZrO2 has the highest catalytic activity, while the catalyst loaded by Al2O3 has the lowest catalytic activity. The catalyst with higher CO adsorption and dissolving capacity has higher activity; meanwhile, the higher reducibility the catalyst has, the higher the activity of the catalyst will be. In addition, catalyst methane selectivity loaded by Al2O3 is the highest, while catalyst methane selectivity loaded by TiO2 is the lowest, which shows that the large pore structure of catalyst is good for heavy hydrocarbon production, meanwhile, formate species generated on the surface of catalyst implies that the formate species is involved in the generation of methane. Keywords.Carrier; cobalt-based catalyst; Fischer-Tropsch synthesis; performance
Simulation of Sulfolane Extraction Distillation Process
Authors: Liu De Xin
Published: January 2014

The sulfolane extraction distillation (SED) process is widely applied to separate aromatics and non-aromatics, but it is difficult to build a model for SED because of unknown binary interaction parameters (BIPs). In this study, liquid-liquid equilibrium data are used to regress unknown BIPs, and other unknown BIPs are calculated based on standard solution theory, and then a process model for RIPPs SED is developed. The gap between model results and RIPPs patent is marginal. It is shown that properties method used and process model built in this paper could calculate the SED process correctly and provide theoretical and technical support to the actual production processes.
Saponins from Panax japonicas Reduces Myocardial Infarction Induced Reactive Oxygen Species Production and Cardiomyocyte Apoptosis via Activation of the Nrf-2 Pathway
Authors: Wei Na , Yuan Ding , He Hai Bo , Xu Yuan Qing , Zhang Chang Cheng , Wang Ting , Liu Chao Qi , Liu Guang Yao
Published: January 2014

Myocardial infarction (MI) increased reactive oxygen species (ROS) and cardiomyocyte apoptosis. Saponins fromPanax japonicus(SPJ) exerted beneficially cardioprotective effects on myocardial ischemia injury and possess antioxidant properties to scavenge the toxic radicals. Nuclear factor erythroid 2-related factor (Nrf2) is a transcription factor that controls the expression of a large pool of anti-oxidant and protects cells from oxidative damage. The data from this study show that SPJ reduced the production of ROS by increase the expression of antioxidants and restore the balance between prooxidants and antioxidants via activation of the Nrf-2 pathway. Furthermore, SPJ might reduce ROS production and apoptosis in hydrogen peroxide-induced H9c2 cells. The effect of MI apoptotic cells induces generation of ROS in abundance. Taken together, SPJ treatment significantly improved MI-induced injury and this may be attributing to inhibiting ROS related apoptosis via activation of the Nrf-2 pathway.
Desirability Approach for the Optimization of Black Pepper Extract and Chitosan Fresh-Keeping Solution Proportion Coating on Tilapia
Authors: Hu Yue Ying , Wang Dan , Chen Wen Xue
Published: January 2014

To study the the influences of bio-preservative combined with black pepper extract and chitosan on the shelf-life of tilapia, through sensory characteristics, response surface methodology was designed by the optimum ratio of Microbiological (total viable count), chemical (pH, TVB-N). The result indicates the model can predict experiment results exactly (p<0.05). Also with the simultaneous optimum ratio, the Design Expert desirability function approach for the optimization showed strong correlation between the real and predicted results. The The optimum conditions were 0.96% for pepper concentration, 1.07% for chitosan concentration and 0.796% for glacial acetic acid concentration when the experimental values were 5.5 for pH, 21.3 for TVB-N and 3.9 for TVC.
Research on Preparation Process of 5% Hexaflumuron Suspension Concentrates
Authors: Zhang Bao Hua , Zhang Qing Ming
Published: January 2014

By optimizing the preparation process of Hexaflumuron suspension concentrates, the optimized conditions were found as following: 1.2mm zirconium beads as the grinding medium, the mass ratio of grinding medium and material was 1.5, The optimum sand milling time was 2h. The suspension concentrates product prepared by the method has smaller particle size, narrow particle size distribution, and good suspended stability.
Synthesis Podophyllotoxin Derivatives via “Click Chemistry”
Authors: Yang Ru Chun , Ding Hai Xin , Wu Yan Li , Xiao Qiang
Published: January 2014

1,2,3-Triazole linked carbohydrate and podophyllotoxin were synthesized in high yield and selectivity. The CuI-catalyzed Huisgen’s [2+3] cycloaddition of azides and alkynes was proved to be powerful tool for constructing podophyllotoxin derivatives.
Synthesis of (R)-3-((4-methoxybenzyl)oxy)butanal
Authors: Tang Lin Jun , Liu Dong Wang , Wang Li Ping , Huang Fei Fei , Huang Shuang Ping , Wang Xiao Ji
Published: January 2014

The key intermediate, (R)-3-((4-methoxybenzyl)oxy)butanal, of total synthesis of tarchonanthuslactone (1) was reported, Which started from commercially available (R)-methyl 3-hydroxybutanoate.
Study on the Making of Amphiphilic Triblock Copolymer as Blood Substitutes
Authors: Ma Yan Chun , Cai Li Ying , Cui Wen Bo , Gao Ying , Li Yun Hui
Published: January 2014

Abstract:The blood substitutes refer to the substitutes of red blood cell with the ability to carry oxygen. This paper adopts open-loop coordination polymerization and gets amphiphilic triblock copolymer of mPEG-PAGE-PDLLA with the hydrophilic end-mPEG segment, and hydrophobic end-PLA segment. And it can be automatically assembled into vesicles in the water. The hemoglobin nanoparticles can be obtained by combining with Vesicle-coated hemoglobin, which are independently blended with oxygen and biodegradable. Meanwhile the paper makes an analysis of various physical and chemical properties to hemoglobin nanoparticles.
A Prophase Study on the Concise Synthesis of Aculeatin A
Authors: Chen Shi Peng , Zhang Jian Ting , Wang Gao Peng , Zhu Cheng Lin , Feng Jun Min , Wang Xiao Ji , Huang Shuang Ping
Published: January 2014

The 1,7-dioxadispiro [5.1.5.-pentadecane spirocyclic architecture is the main structural feature in the aculeatins which attracted scientists interesting for the remarkably high cytotoxicity, anti-bacterial and anti-protozoal activities. A prophase study on concise synthesis of the core 1,7-dioxadispiro [5.1.5.-pentadecane spirocyclic architecture of aculeatins was accomplished by using Mukaiyama aldol reaction.
Effects of Strong-Acid on Performances of Copper Solvent Extraction
Authors: Liu Yan Jun , Liu Xiao Rong , Li Hui , Li Qing , Li Yong Sheng , Su Chang , Tian Jun , Wang Yu Cheng
Published: January 2014

This paper studied the effect of strong acid---concentrated sulfuric acid---on organic phase physical properties, copper extraction rates as well as phase behaviors in the process of copper solvent extraction. Results demonstrate that with the increase of contact time between organic phase and concentrated sulfuric acid, the organic phase density and viscosity slightly decreased, copper extraction rate linearly decreased from 99.8% to 99.5%, and the average size of organic phase droplet in raffinate cyclically trended to decrease. When the contact time is less than 20 hrs, phase disengagement rate decreased slowly. However, further increasing the contact time the phase disengagement rate decreased rapidly. Organic phase physical properties have little effect on phase disengagement rate.
Research on Simulation of Complex Distillation System for Biomass Fuel Ethanol Based on Virtual Assembly
Authors: Wang Yan Bang , Su Yue Feng , Deng Wen Sheng , Zhang Xiao Dong
Published: January 2014

Virtual assembly was introduced in the chemical process simulation, and the method of virtual assembly for common chemical process was studied. The process of biomass fuel ethanol was analyzed which is combined by the first-grade distillation system in industrial ethanol production and the salt-added extractive distillation system in fuel ethanol production, and the scene graph structure was established. According to the assembly characteristics of the chemical process, the assembly equipment model was designed and constructed. The assembly points were added, and the assembly, simulation and transitive properties of the assembly points were defined. The 1+1and 1+n universality assembly method was proposed. By choosing unit equipment freely to assembly, the complex distillation system was realized. Results have shown that the assembly effect was good and accuracy, the method was proved correct and feasible. It is of great significance in the visual design of chemical process, digital construction of chemical plant and development of three-dimensional (3D) chemical process simulation technology.
Study on Reactive Dye Wastewater Treatment with Quaternary Chitosan
Authors: Lin Jie , Wu Ying Min , Lu Yan Hua
Published: January 2014

Chitosan quaternary ammonium salt is synthesized by means of heterogeneous reaction, and then applied to treat reactive dye waste water. Effects of flocculation factors on treatment waste water are discussed. The results show that, the quaternary ammonium salt of chitosan concentration and settling time have great effects on the flocculation effect, and the stirring manner has little effect on flocculation.
Study on Photocatalytic Properties of Graphene/TiO2 Composite Prepared by Impregnation Method
Authors: Wang Zhi Feng , Zhang Yan Hui , Fang Hua , Wang Jian Zhong , Sun Bao Sen
Published: January 2014

Impregnation method was used to prepare of graphene/TiO2composite. Its microstructure, phase and diffuse reflection properties were characterized by using of SEM, XRD and DRS. And the photocatalytic properties of graphene/TiO2composite changed with the reaction time, composite quantity added, X3B initial concentration and pH were investigated. The results show that the degradation degree of graphene/TiO2composite on X3B increases with reaction time increasing. Graphene/TiO2composite of GR3 has the best photocatalytic performance when the introduction of graphene was 0.4mg/g(TiO2). Degradation efficiency of GR3 on X3B increases with the quantity of GR3 added to the solution increasing. And the photocatalytic efficiency is the highest when GR3 is 0.15g. With increasing of X3B initial concentration, the solution degradation rate is decreased. And it is beneficial for graphene/TiO2composite to play its photocatalytic properties in the weak alkaline conditions.
Source of SO2 in Exhaust Gas from Carbon Production and Baking Process
Authors: Ye Wan Li
Published: January 2014

In this paper, by introducing carbon production and Baking process and equipment, the channel for SO2 to generate from Baking fume is explained, sulfur content control requirements for various materials in production are expressed; after analyzing inspection data, it is summed up that SO2 in Baking fume mainly comes from fuel gas, calcined petroleum coke and coal tar pitch do not contain SO2 basically, metallurgical coke has great influence on SO2 concentration in the fume only in the first application, and the influence shall disappear after repeated use, which provides theoretical basis to solve the environmental problems generated because of SO2.
Study on the Recovery of Waste Wool by Combining Reduction and Metallic Salt Methods
Authors: Zeng Chun Hui , Lu Qi
Published: January 2014

In this paper, NaHSO3/LiBr/SDS dissolution system was used to deal with waste wool to prepare non-toxic stable keratin solution with higher dissolving rate and higher molecular weight. Effects of component use levelspH valuereaction temperature and reaction time were critically investigated in detail. Based on the above results, the optimal reaction conditions were obtained. That is, 94 % wool dissolution rate (WDR) and 50.2% keratin extraction rate (KER) reached under the best conditions (NaHSO3: 0.5 mol/L, LiBr: 0.1 mol/L, SDS: 0.02 mol/L, temperature: 90°C, reaction time: 4 h, pH=12). IR spectra showed that the extracted keratin from solution system with the addition of LiBr was dominated by a-helical conformation, which can be used as textile materials or to develop novel functional fibers.
Study on Treatment of Smelting Contaminated Acid by Evaporation Condensing Process
Authors: Zhang Da Chao , Liu Xiao Lai , Guan Da Ming , Xu Xiao Yi , Wu Su Ying
Published: January 2014

Copper smelting gas producing sulfuric acid process produces contaminated acid which contains high concentration of fluorine, chlorine, arsenic and copper, zinc, lead, cadmium and other metals. The sulfide precipitation and lime neutralization methods have been used at present. Those methods have some deficiencies as which produces a lot of hazardous and unwieldy solid wastes, spends huge processing cost, reuse difficultly the water after treatment. In this paper, according to characteristics of this kind of smelting contaminated acid, evaporation condensing process and the feasibility of recycling arsenic, sulfuric acid and valuable metals were studied. Under the condition of atmospheric heating evaporation, this study explored the distribution characteristics of fluorine, chlorine, sulfate radical, arsenic in condensate and in concentrate and the crystallization removal rates of arsenic trioxide in concentrate at different temperatures and different enrichment ratios. The results show arsenic, fluorine and chloride have good removal rates from contaminated acid by evaporation condensing process. Temperature at 130°C, enrichment multiple in 6~7, the removal rate of arsenic, fluorine and chlorine reached 62%, 88%, 77%. The results also show evaporation condensing process has good application prospects to treat smelting contaminated acid.