Investigation on Synthesis Temperature of NdCoO₃ Nanoparticle
GONG Xiao -jie,SHAO Hai，et al
2007, 27 (2): 1-3.
Abstract ( ) PDF ( 186KB ) ( ) 　　
The precursor of composite oxides NdCoO₃ was synthesized from Co(NO₃)₂ · 6H ₂O and Nd(NO₃)₃ · nH₂O with so l-gel process by microwave irradiation using tartaric acid as complexing agent and ammonia used to control the pH of reaction solution .The precursor was then characterized by TG-DTA .It shows that black powders are successfully prepared when heated at 500, 600 , 700, 800 ℃ with Ma -fufurnace .The products obtained were characterized by means  of physical techniques including IR and XRD.The results show that under different synthesis temperatures the composite oxides NdCoO₃ with different size and integrity of crystals can be prepared .The appropriate synthesis temperature of NdCoO3 is 700 ℃.
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Non -Hydrogenation Refining of Coker Diesel(Ⅰ):A Labo ratory Study of Extraction by Furfural Ref ining Lubricating Oil as well as Additive
CAO Gen,LI Wen -shen,et al
2007, 27 (2): 4-6.
Abstract ( ) PDF ( 151KB ) ( ) 　　
   　A laboratory and pilot study on refining coker diesel from refinery No .2 of Fushun petrochemical company CNPC by extraction by furfural refining lubricating oil as solvent and with additive was done .The influences of different operating conditions such as refining temperature , the mass ratio of additive and oil, the volume ratio of solvent and oil on the refining results we re examined by the method of single factor .The suitable operating conditions are determined, under which the stability of coker diesel can meet the quality standard of fir st-rate products , i.e ., refining temperature is 70 ℃, the mass ratio of additive and oil is 0.005 , volume ratio of solvent and oil is 1 .0 , refining time is 30 min, and the settling time is 30 min .
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Microwave Induced Oxidation Process With H₂O₂ for Oiliness Was tewater Treatment
ZHANG Jin -sheng, GUAN Xiao -tong,et al
2007, 27 (2): 7-9.
Abstract ( ) PDF ( 162KB ) ( ) 　　
　  Oiliness wastewater was treated by microwave induced oxidation (M IOP).The effects of kinds of activated carbon, quality of activated carbon , volume of H2O2 , microwave power , irradiation time and pH on COD removal rate were investigated.The results show that COD removal rate of oiliness wastewater under M IOP can reach 86.8%.The optimal conditions of operation are as follows :5 .0 g activated carbon, mix ed with 50mL oiliness wastewater (mass ratio of solid and liquid is 1 ∶10), microwave power is 480 W, irradiation time is 4 min , H₂O₂ volume is 1.5mL , FeSO4 mass is 0 .07 g , pH is 3 .
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Submerged Fermentation of Aspergillus Niger LN0601 to Produce Xylanase
ZHANG Jing,WANG Zhan -y ong,SU Ting -ting
2007, 27 (2): 10-12.
Abstract ( ) PDF ( 228KB ) ( ) 　　
　    The Aspergillus niger LN0601 was used to produce xy lanase by submerged fermentation.The influence factor s of carbon source , nitrogen source , cultural time , cultural temperature , initial pH , and inoculation volumic fraction of spore suspending liquid on the capability of the stain to produce xylanase were studied.The optimum conditions of Aspergillus niger to produce xylanase are as follows :carbon source 5 %(mass fraction)corncob powder , nitrogen source 1% (mass fraction) NaNO3 , cultural time 2 d , cultural temperature 28 ℃, initial pH 6.5, 20% inoculation volumic fraction of spore suspending liquid added to 250mL conical flask with 100mL submerged culture medium , shaking table revolution 150 r/min.Under this condition the xylanase activity could reach to mo re than 2 000U/ mL .
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Supervising and Governing of Air Pollution Over a City
ZHANG Que,CAO Chun -ying
2007, 27 (2): 13-15.
Abstract ( ) PDF ( 130KB ) ( ) 　　
        The level of air pollution, load of different key pollution materials and annual trend of movement were studied with complex index and pollution load index through supervising air pollution over a city .Based on the comprehensive analysis , the sources, characters , quantity , distributions , movement and the up -and -down rules of the air pollution were investigated. Measures of preventing and governing air pollution over a city have been proposed .
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Solution Polymerization of Polyphosphazenes
WU Shuang
2007, 27 (2): 16-19.
Abstract ( ) PDF ( 263KB ) ( ) 　　
        Poly phosphazenes with higher molecular weight and narrow polydispersitie s were synthesized from hex achlo rocyclotripho sphazene by solution polymerization and then characterized.A bubble -observing method , a substitute of traditional viscosity -observing , was developed to determine the end-point of the reaction.The factors of polymerization such as the amount of catalyst , solvent and temperature were investigated.The Purifying of two polyphosphazene derivatives were also discussed.The results show that poly phosphazenes with molecular weight above 2×105 and poly dispersity index of 1 .6 ～1 .7 can be obtained with 30 % ～ 40% yield based on poly(dichlorophosphazene).Polymerization conditions are as follows: hexachlo rocyclotripho sphazene 24 g , sulfamic acid 50 ～ 55 mg , CaSO4 · 2H2O 45 mg , 1, 2, 4 - trichloro benzene 20 m L, reaction temperature 210 ～ 215 ℃.
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Optimization Geology Design of Pair Horizontal SAGD Wells in Super Heavy Oil Reservoirs
CHEN Tie -zheng
2007, 27 (2): 20-23.
Abstract ( ) PDF ( 173KB ) ( ) 　　
　   Guantao formation of Du Block 84 of Shu 1 Region is a special oil reservoir surrounded by top and margin water .In order to enhance the residual oil recovery of Guantao formation of Du Block 84 of Shu 1 Region, SAGD exploitation technology was adopted after elaborate analyses .The optimized design was studied on such parameters as SAGD well pattern , horizontal stage length, horizontal stage position in well and huff - puff parameters by numerical simulation by applying S TARTS software with variable depth and uneven net grid based on reservoir characteristics and present exploitation status .Practice shows that all the parameters  of the design are rational, and it is economical and feasible to enhance the super heavy oil recovery using pair horizontal SAGD wells .
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Microwave -Induced n -Hexane A romatizat ion Reaction
WANG Chan, ZHAO Zeng -hua, ZHOU Bing -lun
2007, 27 (2): 24-26.
Abstract ( ) PDF ( 250KB ) ( ) 　　
　    The aromatization reaction over ZnNi/H ZSM -5, by the microwave heating and conventional heating methods, had been undertaken using n -hexane as the source under the conditions of different temperatures.Compared with the condition of conventional heating , the active centers of B acid and L acid in the ZnNi/ZSM -5 were excited selectively by microwave , the strength of B acid and L acid were enhanced , which accelerated the aromatization reaction, improved the yield of BTX.It is fitting that the aromatization reacted at 450 ℃ by microwave heating the yield and selectivity of BTX is increased about 5 % and 4 % respectively , dealkylation of aromatics can be promoted also , which effects the distribution of aromatics, and results in the increase of benzene and to luene , but decrease of xylene and ethylbenzene in the products .With the increasing of reaction temperature , cracking reaction is strengthened , however , the yields of C-6 and BTX still are more than that by the conventional heating .
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Alkylation of Benzene With 1 -Dodecene Over the WO₃ /ZrO₂ Solid Acid
LI Li, GAO Wen -yi,et al
2007, 27 (2): 27-31.
Abstract ( ) PDF ( 313KB ) ( ) 　　
　    The liquid -phase alkylation of benzene with 1 -dodecene was carried out over WO₃/ZrO₂ solid super acid catalysts, which was prepared by reaction of zirconium oxyhydroxide with ammoniumme tatung state with wet impregnation method.All the catalysts were characterized.The effects of the calcination temperatures, WO₃ loading , reaction times , the mole ratio of benzene and 1-dodocene , and mass fraction of catalyst as well as the regeneration of catalyst were studied .The results show that solid super acid sites can be formed in the WO₃/ZrO₂ system when calcination temperatures is 750 ～ 850 ℃ and mass fraction of WO₃ is 5% ～ 25%;both Lew is and Bronsted acidic centers appear on their surfaces and can transform with each other .WO₃/ ZrO₂ solid superacid catalyst shows high catalytic activities and good regeneration in the liquid-phase alkylation of benzene with 1-dodecene .The optimum reaction conditions are as follows :reaction time 45 min., calcinations temperature 750 ℃, mass fraction of WO₃ 15%, mole ratio o f benzene and 1 -dodecene 10 , mass fraction of catalyst 4 %.Under these conditions , conversion of 1 -dodecene is 97.3%, selectivity of linear chainalkyl benzene (LAB)is 93.7% and selectivity of 2 -LAB is 71 .4 %.
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Catalytic Synthesis of Cyclohexanone 1 , 2 -Propanediol Ketal With Zr(SO₄)₂ /γ-Al₂O₃  Solid Acid
GAO Wen -y i,REN Li -g uo
2007, 27 (2): 32-34.
Abstract ( ) PDF ( 205KB ) ( ) 　　
    　Cyclohexanone 1, 2-propanediolketal was synthesized from cyclohexanone and 1, 2-propanediol with Zr(SO₄)₂ /γ-Al₂O₃  so lid acid catalyst prepared by impregnation -calcination processes.The effects of calcination temperature of catalyst ,mass fraction of catalyst , mole ratio of reactants , amount of entrainer , refluxing time were investigated.The optimal conditions are as follows :catalyst calcination temperature is 550 ℃, the mass fraction of Zr(SO₄)₂ is 20 %, the weight mass fraction of catalyst is 0.5 %, the mole ratio of cyclohexanone and 1, 2 -propanediol is 1 ∶1 .5 , toluenevolume is 15 m L, refluxing time is 3h .Under this condition, higher yield(90 .5 %)of the product with good purity(99 .6 %)can be obtained .
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null
2007, 27 (2): 35-38.
Abstract ( ) PDF ( 191KB ) ( ) 　　
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Numerical Research on Force of PIG in Oil Pipeline
WANG Ya -xin,LI Jia,BAO Rui -xin
2007, 27 (2): 39-41.
Abstract ( ) PDF ( 399KB ) ( ) 　　
　    Pigging technique plays a very important role in managing pipeline running .On the basis of analyzing the pigging physical model, it was established of computation model of characteristic parameters for slug flow , the dynamic mathematical model and the relative numerical calculation me tho d.A numerical simulation was realized .The results show that numerical simulation method can compute pipeline pressure distribution in the process of pigging , which can trace running situation of PID ball in the pipelines .
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Evaluation Method of T emperature Drop of Oil - Gas Two - Phase Flow
WANG Wei - qiang,WU Ming,et al
2007, 27 (2): 42-44.
Abstract ( ) PDF ( 184KB ) ( ) 　　
    　The temperature drop of oil - gas gathering pipelines is mainly related to pressure drop and coefficient of over all heat transmission. The instability of flow along pipelines and the varieties of flow pattern lead to many differences in calculation ways of pressure drop. After taking into account the influence of the aver age gas ratio and Joule - Thomson effect on temperature drop , a mathematical model of oil - gas two - phase flow was established in the oil - gas gathering pipelines. The Baker flow pattern was adopted for evaluating oil - gas two - phase flow . Its result is superior to the result from Sukhov formula. It indicates that the method can increase the calculation accuracy of temperature drop o f oil - gas two - phase flow .
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Analysis and Transformation of the Vibration of Ketone -Benzol -Dew axing Pipelines
CHEN Tao,XIE Yu -jun,et al
2007, 27 (2): 45-49.
Abstract ( ) PDF ( 533KB ) ( ) 　　
　    Owing to pipelines severe vibration because of running of J -63 inketone -benzo l-dew axing plant of the No .2 oil factory in Fushun, the pipeline system can't work stably , which impacts the safety production.Numerical simulation of pipeline system was calculated for the modal analysis , consonance dynamic and steady -state analysis .The reason of pipeline vibration was analyzed using finite element method(FEM), and the pipeline vibration was detected o n-site through state test and failure diagnosis system of CAMD-6100 rotator .It indicates that the simulation result of FEM is approximated to the test result on the spot.The reasonable pipeline structure parameters can be found on the basis of analyzing dynamic vibration performance of pipelines for reducing vibration and enhancing the production security .
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Dynamic Simulation Analysis of Backhoe Working Equipment of the Hydraulic Excavator Based on Pro/E Software
FU Yue,DENG Zi -long
2007, 27 (2): 50-53.
Abstract ( ) PDF ( 533KB ) ( ) 　　
        The traditional design methods to draw the envelope diagram have many shortcomings , such as the heavy workload, imprecision and less intuition .Pro/E software was used to model and assemble for backhoe working equipment of the hydraulic excavator .Above all, the excavator movement process and work conditions were analyzed.Then mechanism kinematics simulation was carried on by Mechanism module in the Pro/ E software.The limit positions of movable arm , bucket arm and bucket were found through setting joint shafts of the excavator .At last , the envelope diagram of the top end of excavator bucket was obtained.The results of motion simulation can be not only shown in form of cartoon, but also output in form of parameters .So the working parameters of the excavator are obtained .It can be know n whether the components interfere and whether excavator design satisfies the performance requirement .Dynamic simulation provides design references for improving over all performances .
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CAD Techniques Based on Knowledge Engineering
GAO Tian -yi,SUN Wei, MA Qin -yi
2007, 27 (2): 54-56.
Abstract ( ) PDF ( 152KB ) ( ) 　　
    　Process of product development is a kind of knowledge -intensive activity .Many researches focus on introducing knowledge engineering to CAD system .Intelligent CAD techno log y , using know ledge base system , solves the knowledge requirement problems of product design .Design based on know ledge implements the integration of CAD and knowledge engineering .Configuration design solves effectively the problem of complex reasoning .Design for customization satisfies the consumer individual needs.Design based on repository realizes product know ledge management and case management .Using XML technique , design based on knowledge network provides an enterprise for knowledge sharing on internet .
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Stability of a Class of Fuzzy Systems Based on Controller Switching
LIANG Xiao -min,NIE Hong
2007, 27 (2): 57-61.
Abstract ( ) PDF ( 200KB ) ( ) 　　
　    On the basis of T - S fuzzy model , the problem of stability for a class uncertain time - delay systems was researched.By using controller switching technique and Lyapunov function method , among several given PDC controllers, an appropriate control law was designed to ensure that , for all admissible uncertainties and time -delay , the relative closed loop system trends to be stable .The main conditions were given in the form of convex combinations, which were easier to solve .A simulation result shows that the design method is feasible and effective .
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null
2007, 27 (2): 62-65.
Abstract ( ) PDF ( 0KB ) ( ) 　　
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Robust H ∞ Control for a Class of Unce rtain Nonlinear System
LIU Xuan -yu,LI Ping,et al
2007, 27 (2): 66-68.
Abstract ( ) PDF ( 134KB ) ( ) 　　
　    For a class of nonlinear uncertain system which has addition uncertainties in the free system , external disturbance input matrix and control input matrix , using Hamilton -Jacobiinequation, a sufficient condition is obtained that the nonlinear uncertain system has robust property .A kind of controllers is given .
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Application of Lua in MSN Robot Psychoanalysis Projects
SONG Yun -feng,WANG Yu
2007, 27 (2): 69-71.
Abstract ( ) PDF ( 152KB ) ( ) 　　
　    There are many kinds of questionnaires in the psychology test and assessment .The computation formulae are always indeterminate , so it is not suitable that the logic is fixed in executive programs through hard-coding .According to the analysis of project function , several kinds of psychology questionnaires and their analysis methods were researched using prototype analysis method, and the target data were described with XML .Through the construction of the original script module , the embedded Luascript can satisfy the project demands .
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Design and Implementation of the Organization -Tree in the Insurance Agency MIS
LI Mi,WEI Hai -ping,et al
2007, 27 (2): 72-75.
Abstract ( ) PDF ( 462KB ) ( ) 　　
　    The characteristics, the function, and the structural design of the organization -tree were analyzed.The method of implementing the dynamic organization-tree in MS SQL S ERVER2000 was introduced .Aiming at the problem that , in the process of dynamically generating organization-tree , the application program manipulates the database frequently and leads to the low efficiency of the system running , a detailed solution scheme for applying the storage process of background database and trigger technique with VC ++6.0 was given.The practical running results show that the system is of stability , keeps business records accurately , and polls information quickly .
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Method of the Safety Access Controlling XM L Based on Xpath
CHE Wu -yi
2007, 27 (2): 76-79.
Abstract ( ) PDF ( 187KB ) ( ) 　　
　Making use of the characteristic of Xpath expression , the document license and the safe accessing controlled scheme of the XML document was put forward.Instead of directly searching XM L document and DOM tree , the scheme sets up a XAC T which is created through XML and ACL .Each node on the XACT contains the accessing controlling limit of a use r .To search the XM L path expression (XPE)can find directly each node on the XAC T.So , the accessing controlling granularity can reach each XM L semantic element.
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Some Discriminant Conditions for Nonsingular H -matrix
CUI Qi,SONG Dai -cai
2007, 27 (2): 80-83.
Abstract ( ) PDF ( 181KB ) ( ) 　　
　  By using concepts and properties of the Ostrow ski diagonally dominant matrices , irreducible Ostrow ski diagonally dominant mat rices and generalized Ostrowski diagonally dominant matrices, several sufficient conditions for a nonsingular H - matrix were given .The conditions enriches the theory of Ostrow ski diagonally dominant matrices and nonsingular H -matrix , which provides theory's base for relative fields' research such as matrix theory , control theory , mathematical economics and so on .
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A Note on Convergence for JOR Ite ration Method
LU Yong -jie,SONG Dai -cai
2007, 27 (2): 84-86.
Abstract ( ) PDF ( 135KB ) ( ) 　　
　    According to the concept of the generalized double strictly diagonally dominant matrix , a new upper bound of spectrum radius for JOR iteration matrix and a convergence theorem of iteration method were given , aiming at commonly used iteration method while solving linear equations.The results are suitable to not only double strictly diagonal dominant matrices but also gene ralized double strictly diagonally dominant matrices.Assessment on spectrum radius of the relative iteration matrix is more exact , and the range of choosing convergent parameters of JOR is extended.An example illustrated the advantages of given results .
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Comparison of the Applications of EVA and Traditional Performance Evaluation Indices
TIAN Yu -xin,WANG Li -hua
2007, 27 (2): 87-90.
Abstract ( ) PDF ( 172KB ) ( ) 　　
　  Taking the listed companies in northeast of China as a sample , the principal components analysis and multivariate linear regression analysis were carried out to study the relationships of market value and some indices namely economic value added (EVA)and traditional performance evaluation indices .The results show that EVA has lower relativity with market value than traditional performance evaluation indices , so EVA is not highly appreciated by Chinese enterprises , it is not possible for us to desert traditional performance evaluation indices and adopt EVA solely .
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Vendor Performance Evaluation Based on Supply Chain
QIU Yue,SONG Huan -bin,LI Yo ng
2007, 27 (2): 91-94.
Abstract ( ) PDF ( 181KB ) ( ) 　　
        Based on analyzing the present fact of domestic and inter national vendor performance evaluation , the enhanced balanced supply chain scorecards (EBSCSC) regarding society environment and resources were proposed fire -newly , fully establishing the performance measurement index system from three levels and six dimensions , such as the financial value , customer satisfaction, internal process, learning and growth , resources and environmental protection .At last , an synthetic evaluation model based on entropy and analytic hierarchy process was established and proven to be scientific and rational depend on the real data from enterprises.The result shows that the index system is comprehensive , ease of manipulation , and can achieve an effective evaluation on vendor performance .
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Substantial Investigation of FDI Industry Clus tering Effect
ZHANG Rui -jun,WU Kui -hao，et al
2007, 27 (2): 95-98.
Abstract ( ) PDF ( 224KB ) ( ) 　　
    　Competitive clustering is the main source of local long -term economic development and prospers .A quantitative analysis index system was established, based on integrity , scope and trends, to make a quantitative analysis of the FDI industry clustering effect of main industries in Liaoning province .The FDI location quotient of each industry in Liaoning was calculated, and the strengthen industries, developing industries , declining industries and inferior industries in FDI industry clustering were investigated, finally some suggests for the development of each industry were put forward.
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