bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effect of Granulosa Cells Apoptosis on the Cumulus Expansion and the Developmental Competence of Bovine Oocytes
Authors: Feng Wei Guo , Pan Zhi Fang
Published: August 2014

In this study, we used the well in the well (WIW) culture system to study the effect of granulosa cells apoptosis on the cumulus expansion and the developmental competence of bovine oocytes. Results: The apoptosis of granulosa cells affect the cumulus expansion of bovine oocytes significantly. Especially when the percentage of granulosa cells apoptosis exceed 40%, the cumulus expansion was worse. The cumulus expansion affect the oocyte developmental competence of bovine oocytes significantly. The developmental competence of bovine oocyte increases with the increasing of cumulus expansion.
Preliminary Metabonomic Analysis of Diabetic Rats Treated with Paired Extracts of Astragalus and Chinese Yams
Authors: Wu Li Rong , Shi Zhong Feng , Gao Wei Dong , Zhu Jia Yong
Published: August 2014

Combined extracts of Astragalus and the Chinese yam are an effective traditional Chinese medicine for treating diabetes. However, formal studies evaluating the effects of this combination of extracts have not been conducted. To examine the antidiabetic effects of this combination of extracts, we carried out a metabonomic study in rats. The collected liquid chromatography/mass spectrometry data were processed using the mixOmics R package. Clustered image maps (CIMs), networks, pattern recognition functions were used to perform preliminary metabonomic analysis, and the efficacy of the different treatments was evaluated. Our data demonstrated that these medicinal extracts may be useful in the treatment of diabetes through modulation of blood glucose levels and blood lipid indices. Additionally, the mixOmics package is a very useful and powerful tool for metabonomics study.
Research on Even Ways of LY12 Semi-Gobbler Thickness Distribution of Super Plastic Expand Forming
Authors: Liu Zhan Jun
Published: August 2014

The theory of super plastic expand forming of metal sheet is rooted. The thickness uneven reason and control way of sheet super plastic expand forming is summarized, the thickness even theory and exactly control way of super plastic expand forming is studied .The result is showed that expand forming time of machined sheet is shorter than even thickness in surely press and height, and smaller forming press in the biggest stress rate, using LY12 alloy of semi-gobbler of super plastic expand forming as example, weight is alleviated by 15.05 percent, the bigger is m , the smaller is thickness difference of top and outside, the change of bulging is smaller in even stress rate.
Synthesis of Aminotriacetic Acid Intercalated MgAl-Layered Double Hydroxides and its Selective IR Absorption Properties
Authors: Wang Tian Lei , Liu Xiao Juan , Liu Mei Tang , Ma Hong Wen , Lin Lin
Published: August 2014

A novel aminotriacetic acid (NTA) intercalated MgAl-LDHs have been successfully synthesized by anion exchange method with MgAl-NO3-LDHs as precursor. The XRD pattern implies that NTA anions have replaced NO3- in the interlayer of LDHs. The FT-IR spectra also indicates that NTA anions have intercalated into layers’ space of LDHs, and the carboxyl groups of NTA have been converted into carboxyl anions after intercalation process. When comparing IR spectra of MgAl-NTA-LDHs and MgAl-CO3-LDHs, higher and stronger absorption was observed in the range of 1428-1250 cm-1, especially in the range of 1111-909 cm-1.
The Influence of Cr2O3 on the Sulfur Capture Efficiency of CaO in Pulverized Coal Combustion Process
Authors: Zhang Sheng Qin , Zhu Guang Jun , Deng Neng Yun , Gao Yan Hong
Published: August 2014

The effects of Ca-based sulfur catcher on sulfur fixing were investigated by experiments. The results indicate that sulfur capture efficiency of CaO is the maximum when n(CaO)/n(S) ratio is equal to 2.5. Moreover, the influences of Cr2O3 on sulfur-fixing of CaO were studied when n(CaO)/n(S) ratio is equal to 2.5. The results indicate that addition of Cr2O3 can improve the sulfur capture efficiency of CaO, and efficiency of CaO is the best when Cr2O3 is added to 0.5%. This is because that Cr2O3 can be oxidized to CrO2. On the one hand, the oxides of chromium can catalyze the reaction of sulfur-fixing. On the other hand, CrO2 can react with SO2 to form Cr2(SO4)3. These also can improve the sulfur capture efficiency of Ca-based sulfur catchers.
Study on Equilibrium of Hydroxyl Complex Ions in Al3+-H2O System
Authors: Ma Yi Wen , Hou Ying , Yin Wan Zhong , Zhu Ju Jian , Ding Ya Zhuo , Yao Jin , Wang Yu Lian
Published: August 2014

Diagrams for the concentration of complex ions pc-pH, the ratio of aluminum hydroxyl complex ions αn-pH, and conditional solubility product of their hydrates to pH in their system were drawn based on the thermodynamic equilibrium principle of complex chemistry. The relationship between the equilibrium concentration of total aluminum ions and pH was shown in Al3+-H2O system, when dissolution of Al (OH)3 is in equilibrium. The solubility of Al (OH)3 is the least when pH=5.69~8.00. The diagram for αn-pH shows that each hydroxyl complex ion existed in the system is dependent upon an optimized pH value. The diagram for the conditional solubility product pPS-pH indicates that the pPS reaches minimum when pH=5.0~8.0. The results can provide a theoretical basis for the technology on the flotation influenced by aluminum ions and removal of aluminum ions from the wastewater by neutralized method.
Sol-Gel Synthesis and Characterization of Nanocrystalline Bi4Ti3O12 Powders
Authors: Ma Chun Hong , Lin Xue , Wang Liang , Yan Yong Sheng
Published: August 2014

Nanocrystalline bismuth titanate (Bi4Ti3O12; BTO) powders were successfully prepared by the sol-gel method, using bismuth nitrate (Bi(NO3)3·5H2O) and tetrabutyl titanate (Ti(OC4H9)4) as source materials, acetic anhydride and ethanediol as solvents. The thermal decomposition and phase inversion process of the gel precursors were studied by using differential thermal analysis (DTA). The crystal structures and microstructures of BTO powders were investigated by using x-ray diffraction (XRD), and transmission electron microscope (TEM). The crystallization of amorphous bismuth titanate has been discussed. The effect of sintering temperature on the structure and morphology of BTO was investigated. At 644 oC and above, BTO powder undergoes a phase transformation from tetragonal to orthorhombic. At 900 oC, the purified orthorhombic BTO nanocrystals were obtained.
Selection of Ion Exchange Resins for Tungsten and Molybdenum Separation
Authors: Huo Guang Sheng , Song Qiong , Liao Chun Hua
Published: August 2014

A solution containing tungsten and molybdenum was acidified using hydrochloric acid, and the ability of several commercial ion exchange resins to separate tungsten and molybdenum was evaluated. The results from the acidification test indicate that when the pH of the solution is adjusted to 7.0, WO42- is polymerized into HW6O215-, while MoO42- is not. The test results of resins selection show that the D213 resin and the D308 resin are superior to other resins in separating low concentrations of tungsten and molybdenum, whereas the D201 resin and the D309 resin are suitable for separating high concentrations of tungsten and molybdenum. The results from the column test indicate that weak-base anion exchange resins are better than strong-base anion exchange resins for both low and high concentrations of tungsten and molybdenum.
Zinc Oxide/Polyaniline Transparent Conductive Film Prepared by In Situ Polymerization Deposition
Authors: Zhong Ping , Cheng Lin Xiu , Lu Xing
Published: August 2014

In this paper，ZnO/PANI transparent conductive film has been prepared by in situ chemical oxidative polymerization, APS as an oxidant. The conductivity and transmittance of ZnO/PANI was measured. It has been investigated of the effects of reaction conditions and the doping component on conductivity, transmissivity and adhesion. With the increase of doping ZnO, the conductivity of ZnO/PANI transparent conductive film, transmittance and adhesion reduced. The optimal conditions is that the concentration of An, APS and PVA are 0.75 mol / L, 0.8 mol / L and 0.5wt%, respectively.
A Multi-Scale Analysis of Mechanical Strength of Solid Catalysts
Authors: Tao Zhong Dong , Huang Kai , Wu Dong Fang
Published: August 2014

Mechanical strength of solid catalysts involves a complex multi-scale system consisting of micro, pellet, pellet-packing and reactor scales. The damage evolution from micro to reactor scale leads to eventual rupture at the reactor level. A multi-scale framework for the mechanics of the fixed bed catalysts is proposed in this article. Some recent developments on the description of the mechanical properties on various scales, factor analyses of the mechanical properties on various scales, correlations between the damaging effects/mechanical properties on neighboring scales, etc. are reviewed, and the proposals for future research are also put forward.
Optimization of Lactose Content in the Row Milk by Colorimetry via Response Surface Methodology
Authors: Ning Jian Ting , Wu Jun Rui , Yue Xi Qing
Published: August 2014

The lactose content in the raw milk by colorimetry was introduced in the paper.On the single-factor experiment basis, it used response surface methodology to establish a quadratic mathematical model of lactose content. After analyzing the significance of the various factors and interactions, the results showed the optimum extraction conditions of detecting lactose content by colorimetry were as follows: reaction temperature 100°C, reaction time 5.2min, amount of precipitation 2.9 mL. In order to verify the method’s accuracy, five kinds of raw milk were chosen to test. The results showed the recoveries were between 97.122%-101.294%, so it is feasible to determine the content of lactose in raw milk.
Analysis Impact of Ribbed Composite Panels for Framework Seismic Performance
Authors: Qian Kun , Wang Miao , Hu Ai Bang , Liu Guo Hao
Published: August 2014

reinforced concrete frame structure due to its economic, applicable and good seismic performance, is a structure in the form of the construction industry in the application of the more common. Due to the functional use need to layout filled wall in the main frame structure, but infilled wall only plays the role of maintaining itself and it can not participate in the earthquake. Ribbed composite wall not only plays the role of maintenance in the frame structure, but can also participate in seismic.
Preparation and Investigation on Properties of the MgTiO3-CaTiO3 Microwave Ceramic Materials
Authors: Dong Li , Dong Gui Xia , Li Yuan Yuan , Zhang Xi
Published: August 2014

The MgTiO3 and CaTiO3 powders were synthesized by solid reaction method, and MgTiO3-CaTiO3 ceramic was prepared using pressureless sintering method. The experiment prepared MgTiO3-CaTiO3 ceramics with high compactness and stable permittivity by the way of changing the mole ratio of MgTiO3 and CaTiO3 to investigate the effect of CaTiO3 on the performances of MgTiO3-CaTiO3 ceramics. The results show that Mg2TiO4 formed as second phase during sintering. Volume density and dielectric constant of MgTiO3-CaTiO3 ceramics with 10%mol CaTiO3 reach maximum of 3.612g/cm3 and 17.8, respectively, under 1460°C sintering temperature. And for the MgTiO3-CaTiO3 ceramics with 5%mol CaTiO3 the maximum values which are 3.5g/cm3 and 16.6, respectively, appear under 1510°C sintering temperature.
Formation and Magic Number Characteristic of Clusters during Rapid Solidification of Mg2Ca
Authors: Zhou Li Li , Xing Chong , Peng You Lin
Published: August 2014

A molecular dynamics simulation study has been performed for a system consisting of 15,000 atoms to investigate the formation and magic number characteristics of various clusters formed during the rapid solidification. Results indicate that the icosahedral cluster (12 0 12 0) plays key role in the glass transition. The size distribution of clusters in the system showing magic number characteristics, and the magic number sequence in the Mg2Ca system is 13, 19, 25, 36, 37, ....This magic number sequence is quite similar with that of the system of metal Al.
Understanding and Assessment of Ancient Chinese Pig Blood–Lime Mortar
Authors: Zhao Peng , Li Guang Yan , Zhang Yun Sheng
Published: August 2014

Pig blood-lime mortar is one of the most representative formulations among the ancient Chinese organic-inorganic mortars. It was used primarily as binding material, lacquer and the ground layer of decorative oil paintings due to its good mechanical and waterproof preformance. Mortar in this work was fabricated according to the formulas of the ancient literature, and the mechanism of interaction between the key components of ancient mortar binding materials was analyzed via X-ray diffractometry. Results show that pig blood accelerates the formation of microstructure at early stage. A mechanism was suggested that biomineralization occurs during the carbonation of calcium hydroxide, where the pig blood functions as a template and controls the growth of calcium carbonate crystal.
Determination of Titanium Oxychloride in Refined Titanium Tetrachloride by Infrared Spectroscopy
Authors: Song Guang Lin , Luo Yun Jun , Li Jin Qing , Li Zhan Bin , Tan Hong
Published: August 2014

Determination of TiOCl2 in refined TiCl4 was significant for analysis of its impurities. TiOCl2 could be determined by infrared spectroscopy due to its infrared characteristic spectrum line. However, normal infrared absorption cell was not fit for the sample analysis, because TiCl4 easily reacted with moisture in the air and immediately was hydrolyzed to form highly corrosive hydrochloric acid smoke. The infrared absorption cell with the window film of ZnSe ( Ф10×1mm, wavenumbers: 7800cm-1~440cm-1) and the glass cell (optical path: 22mm, 12mm, 7mm and 4mm) was assembled and utilized in determination of the TiOCl2 in refined TiCl4 by standard addition method. The detection limit of TiOCl2 was 26.5mg•kg-1, the regression equation was Y=1.0118X, R2=0.9926; With standard addition method, the regression equation of TiOCl2 was Y=1.9400X, R2=0.9940,This infrared absorption device was safe, simple and convenient, easily removable and washable, and re-useable. This method could meet the requirement of determination of TiOCl2 in refined TiCl4.
Geopolymer Materials Treatment of Calcium Arsenate Waste for Arsenic Immobilization
Authors: Luo Zhong Qiu , Liu Shou Qing , Zhang Zhao Shu , Zhou Xin Tao , Xia Ju Pei
Published: August 2014

The calcium arsenate waste, containing amounts of arsenic (7.62 wt%), was treated using solidification/stabilization technology (S/S) with geopolymer. In order to optimize the procedure for S/S, 9 different S/S samples, differing in amount of the geopolymer materials were prepared. On these samples, extraction tests were performed, showing that the arsenic concentration in the leachate was less than the China countermeasure standard (5 mg/l) after 28 days of curing when a geopolymer (GP) dosages more than 30 wt%. Furthermore, the samples showed substantially decreasing leachability with curing times. But there was no appreciable change in leachability under various time and pH conditions.
Analysis of Crimping of Large Diameter Welding Pipe
Authors: Fan Li Feng , Gao Ying , Yun Jian Bin , Dong Lin Feng
Published: August 2014

Crimping is widely used in production of large diameter submerged-arc welding pipes. Traditionally, the designers obtain the technical parameters for crimping from experience or trial-errors by experiments. To tackle this problem, a theoretical analytical model is proposed to analysis crimping forming process.
In this paper, taking the crimping of X80 steel Φ1219mm×22mm×12000mm welding pipe for instance, the theoretical analytical model is constructed by quadratic polynomial curve fitting technique and mechanics theory. And it is verified by a comparison with experiment results. Thus, the presented model of this research provides an effective path to design crimping parameters.
Effects of over Heat and Casting Speed on Quality of GCr15 Billet
Authors: Zuo Qi Wei , An Xia , Yang Jing Bo , Cang Da Qiang
Published: August 2014

In order to improve the quality of the billets, the whole test proceedings by the comparison of the two casting conditions which one is over heat 20°C-30°C under casting speed 0.4m/min-0.6m/min and the other is over heat 10°C-15 °C under casting speed 1.3m/min-1.6m/min are checked during the produce process of GCr15 in some domestic steel-making plant. The results show that the average grade of general porosity decreases 1.0, the average grade of center porosity down 0.5, the average grade of center segregation fall 0.5 and the samples tested in hot upset forging perform better than before. According to the results, the latter is determined to be accepted.
Effects of Rotation Speeds and Media Density on Ground Calcium Carbonate during Ultrafine Grinding Process in Planetary Mill
Authors: Chen Yan Ru , Lu Yi Chen , Lian Xiao Min , Li Chao Yang , Zheng Shui Lin
Published: August 2014

Superfine ground calcium carbonate (GCC) produced by carbonate minerals is a widely used inorganic powder material. In order to get a finer GCC powder with narrow distribution span, the effect of rotational speed and media density on ground GCC were studied by dry grinding GCC in a planetary ball mill under different rotational speed and various media density. The grinding limit-particle size and distribution of grinding calcium carbonate were measured by centrifugal sedimentation granulometer. The structure of GCC was measured by X-ray diffraction. The result shows that low rotational speed and high-density media is conducive to get a product with smaller particle size and narrow size distribution; crystal plane (012) and (122) are more stable than (018) and (116).
Experimental Study on Properties of Coal and Coke Dry Quenching Dust Blend
Authors: Gao Yan Hong , Liang Zhong Yu , Zhu Guang Jun , Deng Neng Yun , Zhang Sheng Qin
Published: August 2014

In the present research work, adding a certain amount of coke dry quenching(CDQ) dust to pulverized coal used in blast furnace is proposed for efficient utilization of resources and reducing smelting cost. The properties of coal blends and coal/dust blends were investigated by using long tube tester and the device of thermogravimetry (TG). Important results were obtained by experimental researches about explosibility and combustion performance. According to optimum blending ratio of coal B in coal blend (around 50%), burnout of coal/dust blends decreases after adding CDQ dust in the range 5% to 10% to blends. However, all of them are more than 80%, which can meet production requirements. In the case of adding about 8% of CDQ dust to coal blend, combustion efficiency is better and safety injection can be realized.
Laboratory Research on Catalysis Combustion-Supporting Agent of Coal
Authors: Yang Yan Hua , Zhang Qian Ying , Qin Yue Lin , Zhu Guang Jun
Published: August 2014

Catalysis combustion-supporting agent of coal powder is the important measure to improve the combustion process of coal powder, so the study on catalysis combustion-supporting agent draws the attention of many scholars. The paper studies the influence of CeO2 and MnO2 addition on ignition temperature, burnout temperature, explosiveness and calorific value of coal powder, and analyzes the catalytic mechanism of CeO2 and MnO2 catalysis combustion-supporting agent.
Quantitative Analysis of Steels Using PLS with Three Data Reduction Methods Based on LIBS
Authors: Kong Hai Yang , Sun Lan Xiang , Hu Jing Tao , Xin Yong , Cong Zhi Bo
Published: August 2014

Three methods, selecting characteristic lines of elements contained in the samples manually, selecting intensive spectral partitions manually and the whole spectra, were used to reduce dimensions of spectra of 27 steel samples acquired by Laser-Induced Breakdown Spectroscopy. The PLS models were built based on the data after dimension reduction to quantify the Mn concentration of samples. The results show that, PLS model built based on selecting intensive spectral partitions can achieve the best result with the least complexity and the highest generalization ability. Selecting intensive partitions is a promising solution to reduce dimensions for original spectra.
Research on New High Efficiency Recovery Process for Complex Refractory Copper Slag Resources
Authors: Huang Hong Jun , Lv De Liang , Cao Xue Feng , Hu Yue Hua
Published: August 2014

The chemical components, dissemination characteristics and flotation behaviour of copper slag have been investigated through chemical analysis, X-ray powder diffraction (XRD), electron microscopeand flotation tests. These results show that the converter copper slag from Hubei, China, is refractory resource owing to its complex composition and mosaic relationship. Copper, iron, and other minerals are closely intergrowth in it. The electron microscope pattern and particle analysis tests demonstrate that the particles of copper are fine and unevenly disseminated in the slag. The proper grinding fineness, types of collectors and collector dosages have been determined through the flotation condition tests. The closed-circuit test is enforced by using the new machine-column joint beneficiation process. As a result, a copper concentrate grading 37.14% at a recovery of 94.75% is obtained. The test result demonstrates that this beneficiation process can treat the complex refractory copper slag effectively.
Study and Application of Magnesium Removal Technique in Zinc Hydrometallurgy
Authors: Wang Shao Long , Lei Ting , Shi Zhe , Liu Ya Bin , Wang Fan
Published: August 2014

Mg2+ removal technique in Zn hydrometallurgy was investigated in a single-factor-based test to examine the impact of NaF dose, pH, reactive duration and the reactive temperature on NaF-based Mg removal and the optimal process condition for NaF-based Mg removal was obtained as below: at the actual NaF dose 0.8~1.0 times as much as the theoretical dose, pH 4.0~4.5, reactive duration of 60~75 mins and the reactive temperature 60~75 °C, the agitation rpm of 400. The up to 85.5% of all Mg can be removed, which can be referenced in any experiment at a pilot-plant scale.
Study of Synthesis of SiO2 Aerogel from Coal Gangue at an Ambient Pressure
Authors: Zhu Jin Meng , Cai Hui Wu , Dang Nan Nan
Published: August 2014

The hydrophobic SiO2 aerogel was prepared by using coal gangue as the starting material—which is viewed as waste in most coal mining and preparation plant—via ambient pressure drying through sol-gel method. The effects of different temperature, time to keep the temperature,vary in mass ratio of coal gangue to sodium hydroxide on the leaching ratio of SiO2 from coal refuses are discussed in this paper. Results showed that the leaching ratio of SiO2 extracted from gangue will be made up to 35.23% compared with the other tests on the condition that the temperature is given 750°C, holding time 2h, the value of ratio of coal gangue to sodium hydroxide 1:0.8, concentration of NaOH 20%. Trimethylchlorosilane (TMCS) is used as modifier to obtain hydrophobicity through solvent exchange and surface modification. We achieved SiO2 aerogel with low density of 0.2559g/cm3, high porosity 88.97%,Strong hydrophobicity (contact angle with water 140.61。) respectively, which demonstrated that the final product exhibits excellent property. Differences among SiO2 aerogel properties were discussed between industrial sodium silicate as precursor and sodium silicate drew from coal gangue as precursor. Results revealed that the the latter is better than the former on properties .Our work provided a potential way to synthetize high value-added product from abandoned by-product coal gangue.
The Development of New Active Gelled Acid and the Practical Application
Authors: Yuan Ping , Yu Jian Ye , Tao Yong Fu , Yuan Yu Feng , Lu Min Hui
Published: August 2014

In order to improve the effect of acid fracturing in reservoirs, a new active gelled acid system is developed. Compared with the conventional acid, the better performance, including the slower reaction rate, lower filtration, inducing cracks, self-redirection, enables the new acid system to realize the deeper reconstruction of reservoir, and then improve the effect of acid treatment. Due to the low surface tension and the low broken plastic residue, the new active gelled acid will flowback easily after fracturing, so it has less damage to the reservoir. In addition, field test showed that the construction friction of the new acid system is 40%~60% of clear water, so it can be used for the operation with large displacement. Practice shows that the acid system is adaptive to different reservoirs, such as sandstone and limestone, and after fracturing by taking it, the production or injection capacity of single well is greatly improved. So the new active gelled acid system is of high popularization value and good application prospect, and plays a positive role to improve the acid modification effect of the reservoir.
Study on the Limestone-Gypsum Sintering Flue Gas Desulphurization Technology in Iron and Steel Plant
Authors: Zhang Zhao Hui , Jiang Han Long , Liu Bai Long , Ji Wei
Published: August 2014

To date, limestone-gypsum has been the most widely used sintering flue gas desulfurization technology in China's steel industry. In order to demonstrate the application status, this paper stated the current desulfurization situation of Baosteel, Meishan Steel, Xiangtan Steel, Zhang steel. Process of limestone-gypsum obtained in these steel companies is playing an increasingly important role in sintering flue gas desulfurization, and a majority of these plants get a high desulfurization rate at more than 90%, which makes great contribution to the work of sulfur dioxide emissions. Besides, some problems of the desulfurization process in these plants are discussed and solutions are put forward to promote further development of the technology. For the prospects of the technology, it has been an inevitable trend to develop integration technology of desulfurization, denitrification and dioxin removal to meet requirements for energy saving work during the Twelfth Five-Year Plan. All these above presented in the paper will provide a basis in reality for the further development of this technology.
The Pilot Plant Design and Operation Scheme Research on Treatment of Fluoride Flue Gas by Wet Absorption in Electrolytic Aluminium Industry
Authors: Jiang Guo Ping , Zhang Zheng Guo , Jin Zhi Liang , Zhao Tao
Published: August 2014

A survey on the tail gas contained HF of the electrolyzed aluminumindustry was analyzed at first,which included the applications of tail gas treating technology and gas purification devices both at home and abroad.Combining with their professional knowledge and engineering experience,a technical scheme was formed that purifying the tail gas with HF by a new progress,which designed a set of pilot plant about wet hydrogen fluoride absorption, and the optimization of this process scheme. At last,safe operation, equipment design and material selection, automatic control were discussed in this paper. It is worth mentioning that the detection method of by-products and the comprehensive utilization of subsequent product were established.
Simulation Model for ASU Distillation Column of a 300 MW Oxy-Fuel Pulverized Coal Boiler
Authors: Gao Jian Qiang , Shen Liang Jie , Wang Ning , Yang Xiang Zhao
Published: August 2014

Based on a 300MW Oxy-fuel pulverized coal boiler,this paper established a dynamic mathematical model of air separation system distillation column, and compiled simulation procedure with the Fortran language on the platform of IMMS. With distillation column as the object of the research, it carried on a disturbance experiment about the outlet air flow of purifier and extractable volume of liquid nitrogen in lower tower. The results demonstrate that when the outlet air flow of purifier decreases, the nitrogen purity in gas is reduced by 0.39%, and the oxygen purity in liquid is reduced by 1.5%;when the outlet air flow of purifier is constant and extractable volume of liquid nitrogen decreases, the nitrogen purity in gas is increased by 0.2%, and the oxygen purity in liquid is increased by 0.06%.
Study on Forming Limit of Irregular Axial Holes Formed by Open-Die Cold Extrusion
Authors: Zhang Shuang Jie , Gu Wen Hua , Dai Xue Rui , Xu Xin , Li Jun
Published: August 2014

The parts with axial special-hole, which are difficult to be processed by traditional machining process because of the high cost and low efficiency, are widely used in many fields. In this paper, a new practicable method to form axial special-hole by open-die cold extrusion is put forward. The four failure types of forming axial irregular-holes by open-die extrusion are analyzed. The key parameters, cone angle, reduction, original ratio of the thickness-diameter, etc., which largely influence forming process and the limits range is analyzed by numerical simulation , and make an experiment to verify the results. Based on the analysis, the law of shaping and the limit of the key parameters are concluded. The optimum range of the die’s cone angles is from 16° to 22°.The largest reduction is 24% for the billets with concave outer profile and 22% for the billets with convex outer profile.
A New Technology for Preparing Rich-Titanium Material by Hydrometallurgy
Authors: Yang Yan Hua , Lei Ting , Feng Lin Yong
Published: August 2014

This paper studies on a new technology for preparing rich-titanium material with titanic slag of electric furnace by hydrometallurgy. Under the condition of temperature 120°C, pressure 0.2MPa, 2h duration holding pressure, NaOH concentration 60～100 g/L, high pressure alkaline leaching can destroy the sosloid structure and selectively remove SiO2 and Al2O3 in the Electro-titanium slag, Then rich titanium product of TiO2＞90% was prepared from electro-titanium slag of TiO280~87%by using acid leaching and washing, on the condition that temperature>80°C, time 2h, acid concentration 25g/L.
Optimization Design Method for Production Parameters of Submersible Pump Well of Polymer Flooding
Authors: Meng Xian Jun , Hou Tie Xin , Cui Hai Qing
Published: August 2014

Aiming at the design goal of the highest efficiency of the electric submersible pump of polymer flooding and basing on the coordination of the production system of the electric submersible pump well of polymer flooding and taking oil well productivity and parameters of electric submersible pump (displacement, lift, power) of the electric submersible pump as the design parameters, a mathematical model of the optimization design method for the production parameters of the electric submersible pump well of polymer flooding using the nodal system analysis method was established, and through the mathematical model mentioned above, the optimization design method for the production parameters of the electric submersible pump well of polymer flooding was given. The optimization design method mentioned above, taking the electric submersible pump well B1-D4-71 of Daqing Oilfield as an example, was applied. The results indicate that the method mentioned above can make the electric submersible pump work in the high efficiency area after the electric submersible pump well B1-D4-71’s being put into production.
An Integrated Comparison for Working Fluids Selection in Both Subcritical and Supercritical ORC
Authors: Zhu Ya Dong , Jiang Liang , Zhou Yao Dong , Yu Li Jun
Published: August 2014

A comparison focusing on the properties and the system performances in working fluids selection for both subcritical and supercritical ORC is proposed. 16 candidates including wet, isentropic and dry fluids are considered. Thermal efficiency, exergy efficiency, Specific net power output and UA value are set as the system performance indicators. Under the premise of working fluids safety and comprehensive consideration of all aspects of system performances, R152a by supercritical ORC is determined by integrated comparison.
Comprehensive Evaluation Method of ORC System Performance Based on the Multi-Objective Optimization
Authors: Jiang Liang , Zhu Ya Dong , Jin Victor , Yu Li Jun
Published: August 2014

The choice of evaluating indicator has a most important influence on the performance analysis and optimization of Organic Rankine-cycle (ORC) system. In this paper, the net output power of unit mass of exhaust gas (), the cycle exergy efficiency (), the total waste heat emissions () and the product of exchanger's area and total heat transfer coefficient () are selected as the four key indicators which can reflect the characteristics of ORC system. And then, a comprehensive evaluating indicator of ORC system performance () is obtained according to the theory of multi-objective optimization. Further, a comprehensive evaluation method of ORC system performance based on the multi-objective optimization is put forward in this paper. After that, this method is used to optimize the evaporation temperature which is considered as a key parameter of ORC system performance. According to researches, the results gained by using a single-objective optimization method with only one performance parameter as the indicator, cannot often take a global view of the ORC system performance and sometimes may lead to a deviation. Researches also show that increases firstly and then decreases with the increment of the evaporation temperature, and there exists a value of evaporation temperature to maximize . Through analysis and researches, it can be found that the comprehensive evaluation method of ORC system performance based on the multi-objective optimization provided in this paper gives a synthetic consideration to the requirements from high-efficiency, economy, thermodynamic perfection and environment protection. Moreover, by using this method, the ORC power generation system may be more likely to achieve the best comprehensive performance.
Disposal of 3.5-dinitro-benzoicacid Wastewater by Semi-Coke/Ozone Combined Technology
Authors: Dang Nan Nan , Cai Hui Wu , Zhu Jin Meng
Published: August 2014

The effects of pH, initial concentration, ozone flow, temperature and semi-coke dosage on 3.5-dinitro-benzoic acid wastewater in the process of carbocoal catalytic ozonation are investigated. The results show that: the removal rate of COD increases with the rise of ozone flow and reaction time in a certain range; temperature has little effect on the removal rate of COD; the removal rate of COD achieve the maximum value when the pH is about 12; the COD removal rate of carbocoal catalytic ozonation is obviously better than single ozonation.
Exploration of Extracting Hydrogen Energy with Converter Waste Gas
Authors: Zhang Qian Ying , Yang Yan Hua , Qin Yue Lin , Zhu Guang Jun
Published: August 2014

This paper introduces the advantage of hydrogen energy source and the state of recover. It given the Thermodynamic parameter of the shift reaction of water gas into the converter waste gas contain CO(g) of high quality, and the specification of the catalysis using the smoke of the converter waste gas (Fe3O4). The paper states the principle and the process of separating out H2 from the mixture gas (H2+CO2) by the pressure swing adsorption method (PSA).
Numerical Simulation of C1 Cyclone in a 5000t/d Cement Clinker Production System
Authors: Dong Li Long , Zhao Wei Lin , Wang Jian Rong , Geng Zong Jun
Published: August 2014

In order to investigate the characteristics of C1 cyclone in a 5000t/d cement production system, the gas flow velocity, pressure and raw particles movement trajectory in this cyclone was simulated on the basis of Fluent 6.3. The RNG k-ε turbulence model and the stochastic trajectory model were proposed. The results indicate that the gas flow velocity and pressure distribute symmetrically, the raw meal particles revolve along with the whirling flow and can be separated more efficiently from the gas in this cyclone.
Quantum Chemical Investigation and Detonation Characterization of DNAZ·HCl
Authors: Yan Biao , Zhou Hong Yu
Published: August 2014

3,3-Dinitroazetidinium hydrochloride (DNAZ·HCl) is a novel insensitive high energy explosive. The density functional theory (DFT) method of the Amsterdam density functional (ADF) was used to calculate the geometry and frequencies. The detonation velocity (D) and detonation pressure (P) of DNAZ·HCl were estimated using the nitrogen equivalent equation according to the experimental density. Results showed that the initial decomposition step of DNAZ·HCl is the loss of NO2 from C2 and Cl is the point of molecular reactivity. D and P are 6881.40 m·s-1 and 20.85GPa, respectively.
Performance Study of Ignition Tube about Shock Overload
Authors: Bai Wei Li , Li Ling Xia , Zhang Jing
Published: August 2014

Based on free Hopkinson bar, preformance test of ignition tube was conducted from input end, output end and radial about shock overload. The results show that radial is more irritable than output end, and output end is more irritable than input end at the same shock overload and pulse width.The radial is worse. When the ignition tube is stressed,the deformation of overall dimension occurs.When the deformation reaches certain degree,the resistance value begins to change. X-ray CT chromatography analysis is performed on ignition tube afer radial shock overload,the result further shows that supporting effect of electrode plug and its close cooperation with shell is helpful to improve anti-overload of ignition tube. Study results shows that structure design of ignition tube is special,the ability of anti-overload is good.It provided Theoretial Support for design and reinforcement of ignition tube in anti-high-overload.
The Main Problems of China's Environmental Policy and Countermeasures
Authors: Li Chuang , Yao Shi Wei
Published: August 2014

The paper firstly pointed out the main problems existing in the implementation of China's current environmental policy, for example, China's environmental policy system is not perfect, environmental regulation enforcement is not in place, environmental standards are lower than the international standard, the collection way of sewage charges is improper and capital investment of China's environmental protection industry is insufficient. Finally, from the concept of sustainable development, the paper put forward relevant policy suggestions according to the main problems of environmental policy in China.
Detonation Characterization and Density Functional Theory Investigation of BDNAZ
Authors: Yan Biao , Zhou Hong Yu
Published: August 2014

N-benzoyl-3,3-dinitroazetidine (BDNAZ) is a insensitive high energy explosive. The detonation velocity (D) and pressure (P) of BDNAZ were estimated using the nitrogen equivalent equation according to the experimental density. The density functional theory (DFT) method of the Amsterdam density functional (ADF) was used to calculate the geometry and frequencies. Results showed that D and P are 5568.08 m·s-1 and 12.34 GPa, respectively, the initial decomposition step of BDNAZ is the loss of NO2 from C2 and O5 is the point of molecular reactivity,
Research on Water Pollution and Control Technology in Rural Areas
Authors: Zhang Feng Li
Published: August 2014

Rural waste, sewage large amounts of fertilizer pesticide as well as livestock pollution of water environment in rural areas. This article analyses the characteristics of rural water resource, pointing out the essence of rural water pollution ,which is a huge loss of excess fertilizer ,not to the rural water pollution, it is brought up the appropriate control technology .
Spatio-Temporal Variations of Aerosol Optical Depth over Areas Around Beijing in Recent 14 Years
Authors: Liu Hao , Tang Xin Ming , Cao Wei , Xie Zhi Ying , Lei Jing Han , Li Ming , Gao Yang
Published: August 2014

Based on the monthly data of MODIS Level 3, the spatio-temporal variabilities of Aerosol Optical Depth (AOD) over areas around Beijing have been analyzed from March 2000 to December 2013. The results presented that: (1) In the past 14 years , the annual mean AODs vary between 0.428 and 0.550; The recent 14 years can be divided into two stages, the first stage is 2000-2007, which shows an increasing trend with an increase rate of 1.349%, while the second stage is 2008-2013, which shows an decreasing trend with a decrease rate of 1.483%; Summer has the maximum AOD, but shows a decreasing trend, while winter has the minimum AOD, but shows an increasing trend. (2) AODs over the south are higher than the north, high AODs are mainly distributed along the southwest of Hebei and southwest of Shandong with an AOD of 0.72, while low AODs are mainly distributed along the north of Hebei and the north of Shanxi with an AOD of 0.23; The spatial distribution of AOD varies with the seasons, AODs are high in spring, and are maximized in summer, then show a significant decrease from summer to autumn, while are minimized in winter.
Study on Optimization of Cationic Resin Regeneration Conditions
Authors: Fan Ding Hui , Yin Li , Liu Jie , Cao Wei Min , Liu Zu Yu
Published: August 2014

In order to optimize the regeneration conditions of cation exchange resin, the paper based on the actual data of production, the cation exchange resin regeneration condition was optimized by the process of mathematical modeling, which achieved good results. Research showed that reducing regeneration acid feeding time could effectively reduce the consumption. It could reduce the production cost and make enterprises obtain more economic benefits. Calculated and measured were agreed showed that the study and calculation on regeneration of cation bed were accord with actual production, and had practical value for ion regeneration process. Through least square fitting showed that the 80min was the best acid feeding time, acid consumption of unit volume of water was the lowest.
The Design of High Power LED Driver Power Supply Based on the Pattern of LLC Harmonic
Authors: Cao Ting
Published: August 2014

The working principle of LLC resonant converter is analyzed. On the basis of the analysis, a high power LED driver power supply circuit is designed based on LLC resonant model. Driver circuit is two-stage: the pre-driver circuit using boundary-conduction mode controller L6562 achieves PFC function, while the post-stage LLC half-bridge topology provides constant pressure parts. This structure makes the overall efficiency of the circuit is higher. And the simulation experiment of the circuit is carried out and the experimental results verify that the driver power supply can achieve high efficiency, low loss and so on.
Formation Pressure Calculation Based on Modified Flowing Material Balance Method
Authors: Huang Quan Hua , Wen Huai Zhong , Zhang Li , Song Tian
Published: August 2014

Formation pressure is an important symbol of driving energy and the key problem of gas reservoir development. Therefore, the formation pressure’s evaluation is a very important work. Due to the invasion of edge-bottom water, using conventional "flow" material balance method to calculate the formation pressure is no longer applicable. According to the theory of reservoir pressure calculation based on flowing material balance method, we established a improved method to calculate the pressure of water drive gas reservoir and verified it by an example. The results show that: edge and bottom water intrusion has obvious effect on the calculation of formation pressure; after considering the influence of water drive, the formation pressure’s calculation results increased, as a consequence the formation pressure’s decreasing range reduced. This research’s result has important reference value for improving the precision of water drive gas reservoir’s formation pressure.
Study on the Transesterification of Phosphatidylcholine over Diethylamine
Authors: Yan Biao , Zhang Tian Tian
Published: August 2014

The catalyst diethylamine with low boiling point can be separated combined with the recovery of ethanol by distillation in the transesterification of phosphatidylcholine, and it was an effective catayst for preparing GPC from natural lecithin via transesterification. Under the conditions of: the catalyst content was 3.6% of the total reaction volume, lecithin concentration was 100 mmol/L , reaction temperature was 60 °C and reaction time was 260 min, the phosphatidylcholine was reacted completely and the yield of GPC can reach about 80%
Efficient Multi-Scale Registration of 3D Reconstructions Based on Camera Center Constraint
Authors: Guo Rui Bin , Guan Tao , Zhou Dong Xiang , Peng Ke Ju , Fan Wei Hong
Published: August 2014

Recent approaches for reconstructing 3D scenes from image collections only produce single scene models. To build a unified scene model that contains multiple subsets, we present a novel method for registration of 3D scene reconstructions in different scales. It first normalizes the scales of the models building on similarity reconstruction by the constraint of the 3D position of shared cameras. Then we use Cayley transform to fit the matrix of coordinates transformation for the models in normalization scales. The experimental results show the effectiveness and scalability of the proposed approach.
Identifying Abbreviations in Biomedical Literature Based on Maximum Entropy with Web Features
Authors: Peng Jing , Wang Yan , Sun Hong Min
Published: August 2014

The number of biomedical literatures is growing rapidly, and biomedical literature mining is becoming essential. A learning classifier based on maximum entropy (ME) for identifying abbreviations is proposed. Two innovative Web-based features for extracting additional semantic information are developed. The study shows the Web as a knowledge source can be incorporated effectively in the machine learning framework and significantly improves its performance. The ME classifier achieves 95% precision and 89% recall on the gold standard corpus “Medstract” and 91% precision and 84% recall on the larger test data that includes 128 full text literatures.
Temperature Monitoring on Microwave Curing of DGEBA E-51 and 4,4’DDM System
Authors: Ma Ren Li , Chang Xin Long , Long Bing
Published: August 2014

Temperature monitoring was done on microwave curing of epoxy resin system consisting of di-glycidyl ether of bisphenol-A(DGEBA) E-51 and curing agent 4,4’diamino-diphenyl-methane (DDM). The study shows that microwave curing of epoxy resin system is an exothermic reaction and the temperature variation during microwave processing has the obvious characteristics of “temperature increment - heat release - temperature falling”. Analysis on the infrared thermal images indicates that each moulding body has its own temperature distribution and differs from others. The non-uniform temperature distribution reveals the uneven electric field distribution in the domestic microwave oven.
The Basic Control Chart Pattern Recognition Neural Network
Authors: Qiao Xu An , Liu Jing
Published: August 2014

The pattern recognition process control diagram, this paper puts forward a new method of training neural network. It only needs a small training data set can complete this work. This method is also compatible with the training algorithm, and get a better network performance. Pattern recognition success rate is very high in the larger parameter range, but also has some comparability.
Based on the Location Entropy Method to Study the Agglomeration Development of the Software Industry of Jilin Province
Authors: Jiang Zhi Xia , Zhang Wen Dan , Li Yan Zhong
Published: August 2014

Through nation-wide and various provinces and regions of the country's gross national product and software industry data Investigation. Combined with industrial concentration index method and location entropy method on the cluster development of software industry and software industry in Jilin province has carried on the empirical research, analysis the software industry in Jilin province while keeping the sustainable development. But the agglomeration development is weak. The software business income, agglomeration degree and the speed of converging in the software industry are below the national average.