THPS Dissolve Iron Sulfide in Oil Tank
LIU Chang-bo, LI Ping*, ZHANG Zhen-hua
2010, 30 (1): 1-3. DOI:10.3696/j.issn.1672-6952.2010.01.001
Abstract ( ) PDF ( 309KB ) ( ) 　　
 
The pyrophoric iron sulfides in oil tank was eliminated under THPS(tetrakis(hydroxymethyl)phosphonium sulfate) and ammonium chloride. It was investigated the effect of mass ratio of THPS and ammonium chloride，the concentration and acidity of dissolution agent, temperature， and reaction time on the efficiency of dissolution. The results show that the efficiency of dissolution to iron sulfide is best when mass ratio of THPS and ammonium chloride is 6.5∶0.6,temperature is 80 ℃, pH is 5, reaction time is 8 h, the dissolution of iron sulfide is best. When the concentration of dissolution agent is 14.0%, the efficiency of dissolution to iron sulfide is reach 92.50%.
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Saccharification by Hydrolysis of Crop Straw Under the Condition of Microwave Radiation
DU Yun-chao，LI Ping，ZHANG Qi-kai, LI Xiao-miao
2010, 30 (1): 4-7. DOI:10.3696/j.issn.1672-6952.2010.01.002
Abstract ( ) PDF ( 494KB ) ( ) 　　
 
The saccharification of crop straw by hydrolysis was carried out under the condition of microwave radiation with the dilute sulfuric acid. The amount of sulfuric acid, the ratio of liquid and solid, the microwave radiation time, the pressure, and the power on the yield of reducing sugar were investigated. The experimental results show that the yield of reducing sugar increased at first and then declined with increasing of the experimental conditions．It was determined that the yield of reducing sugar reached the maximum, 21.8% at the following conditions: the amount of sulfuric acid is 2%, the ratio of liquid and solid is 15.0, processing time is 40 min, the pressure is 0.3 MPa, and power is 225.0 W.
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Screening and Optimization of Conditions of Bacillus Iicheniformis XY-2
XIE Yin-tang, MA Xue-liang, YANG Xiang-hua
2010, 30 (1): 8-10. DOI:10.3696/j.issn.1672-6952.2010.01.003
Abstract ( ) PDF ( 314KB ) ( ) 　　
 
Three strains of bacteria, which had a strong antibacterial activity, were selected from the soil. The strain of XY-2 had the strongest inhibition against Staphylococcus aureus, Bacillus subtilis, Botrytis cinerea, Streptococcus mutans, E. coli. According to the analysis of morphological characteristics, training characteristics, physiological, and biochemical characteristics of XY-2, it was identified as Bacillus licheniformis. The compositions of fermentation medium of XY-2 were optimized by the orthogonal test. The results show that the optimized medium are as follows: ρ(corn starch) 20 g/L, ρ(soybean powder) 90 g/L, ρ(corn steep liquor) 7 g/L. Under these conditions, the concentration of viable cells in fermentation broth can reach 9.67×10⁸ cfu/mL.
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Synthesis of Cyclohexanone1,2-Propylene Ketal Catalyzed by Potassium Dodecatungstocobaltate Trihydrate
LAI Jun-ling, HAN Chun-yu, LIU Chun-sheng, LUO Gen-xiang
2010, 30 (1): 11-14. DOI:10.3696/j.issn.1672-6952.2010.01.004
Abstract ( ) PDF ( 289KB ) ( ) 　　
 
The catalytic activity of potassium dodecatungstocobaltate trihydrate (K₅CoW₁₂O₄₀·3H₂O) on the reaction between cyclohexanone and 1,2-propylene ketal. The effects of the cyclohexanone/1,2-propylene alcohol molar ratio, the amount of the catalyst agent and water-carrying agent, the reaction time, the using regenerated catalyst on the yield of Cyclohexanone1,2-propylene ketal were systematically investigated. The results show that potassium dodecatungstocobaltate trihydrate (K₅CoW₁₂O₄₀·3H₂O) is a good water-carrying agent for the reaction between cyclohexanone and 1,2-propylene ketal. The results showed that the suitable condition for the reaction are as follows: benzaldehyde/1,2-propylene molar ratio is 1∶1.4, the amount of potassium dodecatungstocobaltate trihydrate (K₅CoW₁₂O₄₀·3H₂O) is 0.5 g, the volume of cyclohexane is 9 mL, and reaction time is 70 min. The maximum yield of benzaldehyde 1,2-propylene ketal is up to 94.2%.
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Acidity on Extraction Mechanism of La(Ⅲ) in P₂₀₄-HCl-H₃AOH Extraction System
LI Jian-hong, CHANG Hong-tao, WU Wen-yuan
2010, 30 (1): 15-18. DOI:10.3696/j.issn.1672-6952.2010.01.005
Abstract ( ) PDF ( 439KB ) ( ) 　　
 
In the conditions of pH >1, 0<pH≤1 and pH<0, P₂₀₄-kerosene system and the organic phase loading La in the P₂₀₄-HCl-H₃AOH were studied by infrared spectroscopy. The effect of acidity on extraction mechanism of La(Ⅲ) in P₂₀₄-HCl-H₃AOH extraction system was investigated. The results show that displacement reaction between La and P-OH, and the mechanism is cation exchange when the value of pH>1. Both the group of P=O and the group of P-OH react with La and the extraction mechanism is the dual mechanism theory of cation exchange mechanism and salvation complex mechanism. Thus, the extraction capacity of La in the condition of 0<pH≤1 is increased. When the value of pH≤0, the two groups of P=O and P-OH, especially P=O, take part in the complex reaction.
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Removal of Basic Nitrogen of Coker Gatch
ZHAO Qi-long，LI Dong-sheng*， LI Xiao-ou
2010, 30 (1): 19-22. DOI:10.3696/j.issn.1672-6952.2010.01.006
Abstract ( ) PDF ( 411KB ) ( ) 　　
 
Using a kind of compound solvent as denitrification agent to remove the basic nitrogen of CGO .Different process conditions including reaction temperature, denitrification agent to CGO mass ratio and reaction time on the effect of basic nitrogen remove rate and the light oil yield were studied．The experimental results show that the oil yield was 94.23% , and the basic nitrogen remove rate reached to 85.62% under the conditions of the reaction temperature 72 ℃ , the solvent to oil mass ratio 2.5%, the stirring speed 300 r/min , the reaction time 30 min and the settling time 15 min，which is the best reaction condition.
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Statistical Values of Valence Electron Structure Parameters and Theoretical Research of Melting Point of Cu, Ag and Au
LI Fei, ZHAO Xia，LI Zhi-wu
2010, 30 (1): 23-26. DOI:10.3696/j.issn.1672-6952.2010.01.007
Abstract ( ) PDF ( 265KB ) ( ) 　　
 
Based on the empirical electron theory of solid and molecules (EET), the valence electron structures of Cu, Ag, and Au were analyzed. The statistical values of valence electron structure parameters E′_A and T′_m, which characterize the properties of metal single element, were calculated. Furthermore, melting points of Cu, Ag and Au were calculated by the value of T′_m and E′_A. The calculations results show that the melting point of corresponding melt is higher when the value of E′_A is bigger, and the change trend of E′_A in accordance with the experiment. The statistical values of melting point of Cu, Ag and Au were T′^Cu_m=1 351.0 K, T′^Ag _m=1 126.2 K, T′^Au_m= 1 305.0 K, respectively. The corresponding deviation of experiment values are 0.41%, 8.82%, 2.33%.
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Determination of the Chemical Oxygen Demand of the Water From Styrene Condensate Stripper
REN Xiu-zhen, MA Xue-liang, YANG Da-wei, YANG Xiang-Hua
2010, 30 (1): 27-29. DOI:10.3696/j.issn.1672-6952.2010.01.008
Abstract ( ) PDF ( 240KB ) ( ) 　　
 
The experiment shows that it is feasible to determinate the chemical oxygen demand(COD) of the water from styrene condensate stripper by Fushun chemical plastic plant. We Compared the rapid determination method by COD tester and assay. These results show that the accuracy and precision of relative standard deviation (RSD) is between 0.0%～5.0% through the calculations of the standard addition recovery rate and the measurements of the standard sample. These results meet the requirements of the water quality monitoring in laboratory. Therefore, the above method can be promoted for application.
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Determination of Nickel in Ordinary Alloy Steels by Microwave Digestion Spectroscopy
LI Li-hua, ZHANG Jin-sheng*, YANG Jin-guang
2010, 30 (1): 30-32. DOI:10.3696/j.issn.1672-6952.2010.01.009
Abstract ( ) PDF ( 273KB ) ( ) 　　
Ordinary alloy steel samples were digested in a microwave digestion system. The parameters of microwave digestion (including system of acid, time, power, and pressure) were optimized. Extraction method was used to eliminate the interference of Cu、Fe、Mn ion on Ni from the ordinary alloy steel samples. The nickel content in the samples was determined by ordinary pressure spectroscopy method. The relative error of microwave digestion is less than 1.67% and the RSD(n=5) is less than 1.24%. It is less than general method that is relative error of 2.67% and RSD（n=5）of 3.72%.
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Catalytic Synthesis of Cyclohexanone 1,2-Propylene Ketal by Chitosan Supported With Iodine
HAN Chun-yu, HU Ning-bo, LIU Chun-sheng, LUO Gen-xiang
2010, 30 (1): 33-36. DOI:10.3696/j.issn.1672-6952.2010.01.010
Abstract ( ) PDF ( 431KB ) ( ) 　　
 
Chitosan supported with Iodine was synthesized at room temperature and the structure was characterized by IR, XRD, and TGA. Ketalization of cyclohexanone and 1,2-propanediol catalyzed by chitosan supported with iodine was studied. The effect of reaction time, the ratio of alcohol and ketone, catalyst amount, and the volume of water-carrying agent on the yield of cyclohexanone 1,2-propylene ketal were investigated. The results show that the suitable condition for the reaction are as follows: the amount of cyclohexanone is 0.1 mol, the molar ratio of 1,2-propanediol and cyclohexanone is 1.3, the amount of catalyst is 0.4 g, the volume of cyclohexane used as the wate-carrying agent is 8 mL, reaction time is 60 min. The ketal yield is up to 96.3%. The catalyst could be reused five times without significant declining of catalytic activity.
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Synthesis of Cyclohexanon 1,2-Propanediol  Ketal Over Fe₂(SO₄)₃/SiO₂ Catalyst
REN Li-guo, ZHANG Xiao-li, YU Ji-wei
2010, 30 (1): 37-40. DOI:10.3696/j.issn.1672-6952.2010.01.011
Abstract ( ) PDF ( 424KB ) ( ) 　　
Cyclohexanone 1,2-propanediol ketal was synthesized by using cyclohexanone 1,2-propylene glycol as starting materials and silica-supported ferric sulfate \[Fe₂(SO₄)₃/SiO₂\] solid acid as a catalyst under solvent-less conditions. The catalyst was prepared by sol-gel and impregnation methods. Efects of factors on yield of product，such as calcination temperature of Fe₂(SO₄)₃/SiO₂ solid acid catalyst, the mass fration of Fe₂(SO₄)₃, molar ratio of the reactant，reaction time，mass fraction of catalyst and its stability，were investigated in detail. The results show that the Fe₂(SO₄)₃/SiO₂ has high catalytic activities. The optimal reaction conditions are: calcination temperatures of Fe₂₍SO₄)₃/SiO₂ solid acid catalyst 300 ℃, the mass fration of Fe₂(SO₄)₃ in SiO₂ 20%, molar ratio of cyclohexanone to 1,2-propanediol 1∶1, the mass fraction of catalyst 5% and the reaction time 70 min. Under the above conditions the yield of cyclohexanone 1,2-propanediol ketal is 98.21%. Fe₂(SO₄)₃/SiO₂ catalyst is excellent in stability and reusability，and yield of cyclohexanone 1,2-propanediol ketal keeps at 88.90% after being used for 5 times
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Anodic Oxide Coating Preparation of Aluminum Alloy With Dirrect Current
ZHANG Xing
2010, 30 (1): 41-43. DOI:10.3696/j.issn.1672-6952.2010.01.012
Abstract ( ) PDF ( 510KB ) ( ) 　　
 
As sample, industrial pure aluminum L2 after surface preparation and anodic oxide coating with D.C. was studied. The effect of oxidation time and voltage on thickness and hardness of anodic oxide coating was discussed. The results of SEM, EDS and analysis of the cross section of the sample coated oxide film show that optimal condition of anodic oxide coating preparations are as follows: 200 g/L H₂SO₄,1 g/L Al₂O₃, D.C. 10 V, 40 min oxidant time, (20±1) ℃. Under this condition, uniform, harder and tighter with the basal body of the sample can be obtained. Moreover, it was found that the film is become thicker and the hardness is deceased with increasing the oxidant time.
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Effects of Magnetic Field Intensity on Microstructure and Property of Sn-9Zn Solder
WU Min，LI Jin-quan，XIU Yan，WANG Yan
2010, 30 (1): 44-47. DOI:10.3696/j.issn.1672-6952.2010.01.013
Abstract ( ) PDF ( 505KB ) ( ) 　　
 
Effects on microstructure and property of Sn-9Zn solder alloy were researched under different magnetic field intensity by means of XRD,Leica and Microhardness, etc. The result shows that external magnetic field can promote microstructure refinement of Sn-9Zn solder alloy, but can't change its phase. Wetting ability and microhardness of Sn-9Zn solder alloy enhance with increasing intensity of external magnetic field, and microhardness of Sn-9Zn solder alloy reach to 22.9 MPa at 0.5 T of external magnetic field, which increases 13.2% compared with no external magnetic field action to the solder.
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Calculation of the Thin film Lubrication on Harmonic Gear Considering the Effect of Surface Roughness
SUN Chun-yi， SHI Bin
2010, 30 (1): 48-50. DOI:10.3696/j.issn.1672-6952.2010.01.014
Abstract ( ) PDF ( 260KB ) ( ) 　　
 
Considering the influence of surface roughness，by using the average Reynolds equation based on the average flow model, the teeth lubrication appearance of harmonic gear drive was researched further. The calculation relationship between tooth face pressure and oil film thickness was deduced, the numerical solve of shear films and squeeze films was computed，the curves of teeth minimum oil film was given. The result shows when the teeth surface roughness is enlarged, the effect of hydrodynamic pressure lubrication it caused is strengthened, the lubrication oil of teeth is saved easily, the enough oil film can be established.
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Short-Term Operation Analysis of Heat Exchange on Single U-Tube Heat Exchanger of Ground Coupled Heat Pump
LI Xiao-ling，MA Gui-yang
2010, 30 (1): 51-54. DOI:10.3696/j.issn.1672-6952.2010.01.015
Abstract ( ) PDF ( 1001KB ) ( ) 　　
A single U-tube is the most common type of ground heat exchange in Ground Coupled Heat Pump(GCHP)system, and ground heat exchanger is an important component of the GCHP system. The real shape of U-tube was considered, and heat transfer model of underground vertical buried tube heat exchanger was built with math methods and numerical analysis software. The soil temperature distributions around the buried tube under different working conditions were solved by programming. The analysis shows that the thermal conductivity and specific heat of soil, the thermal conductivity of backfilled material in drilling and the distance between U-tubes have direct effect on the heat transfer performance of buried tubes. The results may provide guidance in the design of GCHP systems．
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Application of Systematic Layout Planning Method on the Layout of the Hydraulic Parts Factory
XI Wen
2010, 30 (1): 55-59. DOI:10.3696/j.issn.1672-6952.2010.01.016
Abstract ( ) PDF ( 405KB ) ( ) 　　
 
It was introduced using SLP method on the overall layout of the hydraulic parts factory; Through the basic elements analysis of the hydraulic parts factory and operational units of material flow analysis, obtaining the facility relationship based on the theory of classical systematic layout planning. According to the relationship between logistics targeting parameter values, and it adapted a genetic algorithm to find out the suitable plant layouts; Finally, the optimized layout of the program is cost-comparison method to assess evidence for using SLP layout of the feasibility and optimization.
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Optimal Design of the Clamp of the Sensor in Surveying Ice-Jamming Position of Pipe
HAO Jiao， LIN Chang-jian
2010, 30 (1): 60-62. DOI:10.3696/j.issn.1672-6952.2010.01.017
Abstract ( ) PDF ( 631KB ) ( ) 　　
 
When the ice-jamming position of pipe is checked by resistance strain sensation, it was proposed to adopt a clamp which could be dismantled and installed times without number to make the operation convenient and avoid affixing resistance strain flakes repeatedly. A clamp with n-structure and a small elliptic hole was advanced, then the loading situation of clamp was analyzed theoretically and the distribution of strain was simulated through finite element method. The analysis results indicate that with this clamp the signal-to-noise of the sensor is improved and lays a foundation for the use of clamp in checking ice-jamming position of pipe.
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Mathematical Modeling and Graphics Simulation for Tooth Profile of an Ellipse Involutes Gears
REN Fang-shu，TANG Xiao-chu
2010, 30 (1): 63-66. DOI:10.3696/j.issn.1672-6952.2010.01.018
Abstract ( ) PDF ( 645KB ) ( ) 　　
 
A new modeling method of an ellipse gear's profile was proposed. Firstly, according to the analysis of the forming principle of the involutes profile and the tooth thickness of formula, a mathematical model of involutes profile was established. Secondly, a geometric relationship of pinion cutter and pitch curve of an ellipse gears was established, which made pinion cutter do pure rolling. Then the engaging equations of two models were combined and the mathematical model of tooth profile of ellipse gear was established. Third, in processing, the arc length of cutter on the pitch curve was equal to be the length of cutter rotating around its axis in order to guarantee the generating between the pinion cutter and the blank. Finally, an involutes profile of an ellipse gears was formed using the method of computer graphics simulation. The accuracy and the validity of the mathematical model were confirmed by simulation.
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Study and Application of Web Service on JXTA Network
TIAN Qian-jin, BI Yu-shen, WANG Xue-tao
2010, 30 (1): 67-70. DOI:10.3696/j.issn.1672-6952.2010.01.019
Abstract ( ) PDF ( 350KB ) ( ) 　　
To achieve the interaction of the P2P networks application with the Web Service, the method of introducing JXTAWSPROXY in JXTA P2P network was presented. Calling Web Service client-side codes were generated through AXIS, and the JxtaBiDiPipe was used to achieve two-way communication. The peer transparent calling to outside Web Service was achieve. The experiment results show that the method can complete the interaction with the JXTA and effectively achieve the calling to Web Servic
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Moving Object Detection Based on HSV Color Space and Fixed Scene
XU Xiao－jun，JI Yu－bo2
2010, 30 (1): 71-75. DOI:10.3696/j.issn.1672-6952.2010.01.020
Abstract ( ) PDF ( 812KB ) ( ) 　　
Aiming at detecting chromatic moving object from video sequences with fixed scene．HSV color space was adopted to represent each raw frame in video sequences，then it established background frame based on self-adaptive background model by extracting V value in raw frame, and detected moving object based on background subtraction．Motion region binarization incorporated H value in raw frame to filter motion region，in order to obtain the foreground frame in which the special moving object was selected．The experimental results show that the algorithm can achieve the special color moving object detection in the video with fixed scene and several moving objects very well．
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A Novel Layered Texture Synthesis Algorithm
GUO Xiao-ming
2010, 30 (1): 76-80. DOI:10.3696/j.issn.1672-6952.2010.01.021
Abstract ( ) PDF ( 1092KB ) ( ) 　　
 
Current texture synthesis algorithms can neither preserve the integrity of the salient object, nor keep the same distribution of the salient object in the synthesized textures as that in the source texture. A novel layered texture synthesis algorithm was proposed. Firstly, the salient objects were extracted by adopting the normalized cut image segmentation method. Then an image imprinting algorithm was applied to fill the holes caused by salient object extraction in the background to generate a completed background sample, with which we can synthesis the full background image of the target texture. The experimental result shows that this algorithm can not only get the distribution of the salient object in the synthesized textures but also preserve the integrity of the salient object.
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α-Diagonal Strictly Dominance Matrix and Convergence Theorem of Iteration Methods
SONG Dai-cai, WEI Xiao-li，ZHAO Xiao-ying
2010, 30 (1): 81-83. DOI:10.3696/j.issn.1672-6952.2010.01.022
Abstract ( ) PDF ( 263KB ) ( ) 　　
Some iteration methods for solving linear system were studied，when coefficient matrix is α-diagonal strictly dominance or doubly diagonal strictly dominance, and some convergence theorems were given. Results obtained were applicable to α-diagonal strictly dominance matrix or doubly diagonal strictly dominance matrix, and improved the known results and were suited to extended matrices. Finally, an numerical examples were given for illustrating advantage of results．
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Symplectic Geometry Characterization of Self-Adjoint Domains for Symmetric Differential Operators in Direct Sum Spaces(Ⅲ)
WANG Zhi-jing
2010, 30 (1): 84-87. DOI:10.3696/j.issn.1672-6952.2010.01.023
Abstract ( ) PDF ( 226KB ) ( ) 　　
 
The characterization of self-adjoint domains for symmetric differential operators with interior singular points in the direct sum spaces was investigated. By constructing different quotient spaces, using the method of symplectic geometry, self-adjoint extensions of symmetric differential operators in the direct sum spaces for the different deficiency indices at (2n,2n)singular points were studied. The classification and description of complete Lagrangian submanifold that correspond with self-adjoint domains of second order differential operators were given.
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Approximation and Fitting of a Kind of Operators
FAN Chuan-qiang
2010, 30 (1): 88-91. DOI:10.3696/j.issn.1672-6952.2010.01.024
Abstract ( ) PDF ( 209KB ) ( ) 　　
 
Lagrange operator（Ln）and Bernstein operator（Bn）are two important operators used to deal with polynomial approximation and fitting problems, and they have advantages and disadvantages of their own. As to how to avoid weaknesses of these two operators, scholars have made unremitting efforts. One of the most famous is the French mathematician Sablonniere P, who introduced and studied a kind of new quasi-Bernstein interpolation operators in 1992. This kind of operators have given dual attention to the Lagrange operator and the Bernstein operator merit, and have avoided the two's deficiency. After giving the expression of operators B (k) n in detail when n=3. How to make use of these operators to conduct design of polynomial curve satisfying certain given conditions was proposed.
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Application of Fuzzy Evaluation Method in Risk  Assessment for Real Estate Investment
LIU Yi-ding, WANG Jun
2010, 30 (1): 92-95. DOI:10.3696/j.issn.1672-6952.2010.01.025
Abstract ( ) PDF ( 276KB ) ( ) 　　
 
After the financial crisis in 2008, real estate market in Fushun city began to appear the promising phenomenon. However, in the reality of our city, the small and medium-sized real estate industry still had many problems. The operators did not have a strong sense of investment, the basic decision-making lying in the experience, and most developers lacked scientific and objective analysis of the feasibility of investment. In addition, the supply and demand was disjointed. On one hand, excessive inefficient supply resulted in a great deal of vacancy; on the other hand, the keen need of people wasn't met. The factor and mechanism of the risk in real estate market were analyzed. On this basis, the fuzzy evaluation method was applied to appraise real estate risk of Fushun and the relevant preventable and controllable measures were put forward.
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