Determination of Quercetinat Poly(Crystal Violet) Modified Glassy Carbon Electrode
Tang Jing,Zheng Shengbiao,Wang Wei,Wan Hai,Liu Li
2017, 37 (3): 1-5. DOI:10.3969/j.issn.1672-6952.2017.03.001
Abstract ( ) PDF ( 2954KB ) ( ) 　　
The poly (crystal violet) modified electrode (PCV/GCE) was prepared by cyclic voltammetry polymerization under alkaline conditions and the electrode was characterized. The electrochemical behavior of quercetin (Quercetin) on the modified electrode was investigated. The results show that poly (crystal violet) modified electrode has better electrocatalytic activity for the oxidation reduction of quercetin, the redox potential difference in PCV/GCE decreases, and the peak current increases obviously. The crystal violet on the electrode surface acts as a transfer mediator to accelerate the electron transport during the electron transfer of quercetin. In the PBS buffer solution with pH=6.5 and concentration of 0.10 mol/L,the differential pulse voltammetry (DPV) response of the poly crystal violet modified electrode is linear with quercetin 0.10~60.0 μmol/L, and the detection limit was 0.05 μmol/L(S/N=3).The crystal violet modified electrode has good performance in terms of stability, selectivity and reproducibility. The electrode is used to detect the content of quercetin in the liver tablets. The recovery rate is 98.97%~102.01%.
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Synthesis of 1,1-Diphenylhepta-1,2-dien-3-yl Diphenyl Phosphine Oxide Compound
ChenYang,Sun Jing,Zhou Mingdong
2017, 37 (3): 6-10. DOI:10.3969/j.issn.1672-6952.2017.03.002
Abstract ( ) PDF ( 3302KB ) ( ) 　　
This article reported the method about the synthesis of a foursubstituted diphenyl phosphine oxide type allene compounds. In the solvent system of anhydrous triethylamine, 1,1-diphenylhept-2-yn-1-ol reacted with chlorodiphenylphosphine in anhydrous tetrahydrofuran, it got the desired product (1,1-diphenylhepta-1,2-dien-3-yl diphenyl phosphine oxide compound) in good yield. The structure was analyzed by NMR, IR, HRMS to confirme the structures of the desired product.
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Catalytic Performance of a New Type Mononuclear Cobalt Schiff Base Complex for Water Oxidation
Liu Jia,Wang Xin,Xie Ruixia,Guan Yang,Chen Ping
2017, 37 (3): 11-14. DOI:10.3969/j.issn.1672-6952.2017.03.003
Abstract ( ) PDF ( 2709KB ) ( ) 　　
A bis Schiff base ligands was synthesized using 2-hydroxy benzaldehyde and ethylenediamine. With schlenk technique and nitrogen protecting conditions, anhydrous cobalt chloride was reacted with the ligands in a 1∶1 molar ratio to form a mononuclear cobalt (II) Schiff base complex used for electrically driven catalytic water oxidation. After purified, the complex was characterized using nuclear magnetic resonance, infrared spectroscopy and high resolution mass spectrometry. And the electrochemical performance of the catalytic oxidation of water was investigated by cyclic voltammetry using electrochemical workstation. The result indicated that the catalyst has an active electrically driven water oxidation catalytic activity under the condition of neutral pH, and the initial oxygen release potential of the oxidation peak is only 0.5 V. The multiple consecutive scan results of the CVs showed that there was no new redox reaction in the process of water oxidation.Therefore the catalytic system was with good stability. Combined with the low synthesis cost and the difficulty of synthesis and purification, the complex is considered to have good research value and application prospect in the field of catalytic water oxidation.
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Residual Strength Evaluation of Corroded Pipeline Based on Effective Area Method
Sun Dongxu,Zhao Ling,Wu Ming,Xie Fei
2017, 37 (3): 15-18. DOI:10.3969/j.issn.1672-6952.2017.03.004
Abstract ( ) PDF ( 2537KB ) ( ) 　　
The residual strength evaluation of corroded pipeline carried out regularly was significant for guiding pipeline maintenance and operation safety. Effective Area Method, an important residual strength evaluation technique, was studied. A corrosion defect measure method was proposed, which was suitable for the Effective Area Method. The computer program was compiled according to the calculation model of Effective Area Method. The residual strength of an actual pipeline defect was evaluated by the Effective Area Method and Modified B31G respectively. The result showed that the Effective Area Method was less conservative than Modified B31G.
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Study on the Law of Natural Gas Hydrate Sedimentationinthe Process of Pipeline Transportation
Gong Qingjun,Ma Guiyang,Pan Zhen,Li Cunlei,Xing Chengmin
2017, 37 (3): 19-23. DOI:10.3969/j.issn.1672-6952.2017.03.005
Abstract ( ) PDF ( 1702KB ) ( ) 　　
Natural gas hydrate was becoming more and more important in Chinese energy structure, which had the advantages of high gas content, low pollution and large reserves. Therefore, it was necessary to study natural gas hydrate. Aiming at the common blockage problem in transmission pipeline for natural gas hydrate, on the background of subsea level pipelines and based on the multiphase flow model, the calculating and analyzing natural gas hydrate mathematical model was established in gassolid two phase flow based on finite volume method. And the relationship was obtained between the difference of the diameter (the diameter of the pipe and the through-flow diameter) and the distance from inlet. When the inlet flow velocity and the diameter of the pipe were fixed, the stack position of the gas hydrate in the pipeline was analyzed with the difference of the diameter. Calculation results showed that with the other conditions remaining unchanged, as the increase of the distance from the pipe inlet, the change rule of the difference of the diameter was in accord with Gauss curve. Then the change rule was fitted and Gauss function equation was obtained, which could calculate the difference of diameter under a given position of pipe. Finally, through changing the diameter size of pipeline, the simulation and analysis were carried out, whose results showed that Gauss function equation also applied in pipelines with different diameters. A theoretical basis for predicting the stack position was provided in the pipeline and improving the transport efficiency of natural gas hydrate.
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Experimental Study on Static Imbibition of Tight Sandstone
Wu Runtong,Yang Shenglai,Wang Mibang,Lyu Daoping,Kou Gen
2017, 37 (3): 24-29. DOI:10.3969/j.issn.1672-6952.2017.03.006
Abstract ( ) PDF ( 3450KB ) ( ) 　　
In order to research on the impact of imbibition effects, mechanisms and the correlation factors of the tight oil cores, the experimental devices of tight core imbibiton were established. The experiments of oil-water imbibition of tight sandstone were carried out. The effects of temperature, pressure and surfactant on the oil-water imbibition in compacted core were studied. The curves of imbibition efficiency versus time, characteristic points of curve and the influential factor of imbibition were analyzed. The imbibition law and characteristics of tight sandstone core were obtained. The results showed that the effect of imbibition was mainly occurred on the surface layer of the tight oil core. The temperature had a large effect on the second stage of imbibition. The oilwater imbibiton efficiency of the single tight oil core is about 10%, which is about 25% under the formation conditions.
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Calculation Method for Water Influx of Edge Water Gas Reservoir with Oil Ring
Xia Jing,Zheng Lingyun
2017, 37 (3): 30-34. DOI:10.3969/j.issn.1672-6952.2017.03.007
Abstract ( ) PDF ( 2027KB ) ( ) 　　
It is great important to accurately predict the water influx rate and cumulative water encroachment for the adjustment of oil and gas field development technology countermeasures. Combined with the principle of seepage flow mechanics, the mathematical model for calculating the water and water influx is established for a gas reservoir with an oil ring with an oil band. The model takes into account the changes of water invasion velocity caused by the variation of the seepage resistance in the oil zone. Through the argumentation and calculation, the rapid and practical algorithm is obtained. The example of the mathematical model for practical calculation established shows that the algorithm has comparatively high serviceability.
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Experimented Study on the Influence Factors of Spontaneous Imbibition in Ultra Low Permeability Fractured Reservoir
Liu Changli,Liu Xin,Zhang Lina,Chen Zhenlong
2017, 37 (3): 35-38. DOI:10.3969/j.issn.1672-6952.2017.03.008
Abstract ( ) PDF ( 2099KB ) ( ) 　　
        Water flooding development has become the only way for the ultra low permeability fractured reservoir development. However, due to the problems of reservoir micro fracture development, serious heterogeneity and critical water, resulting the water flooding recovery was low.Spontaneous imbibition oil production is an important way of oil production in this kind of reservoir, on the basis of the use of indoor experiment, the salinity of injected water, core permeability, oil saturation, surfactant, oil viscosity and temperature in a low permeability fractured reservoir were studied systematically. Experimental results show that when the environment formation water salinity is less than the mainland core layer water salinity, or joining a surface active agent could significantly improve spontaneous imbibition effect. as the permeability and oil saturation increased and the crude oil viscosity decreased; capillary imbibition became stronger and the ultimate imbibition recovery is greater; the increase of temperature can increase the initial imbibition rate, but the ultimate imbibition recovery is basically the same, the temperature is not the direct acting factors about imbibition effects in ultra low permeability fractured reservoir.
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Summary of Development Pattern and Development Effect Evaluation of Bohai YOil field
Zhang Jianmin,Lei Yuan,Jiang Yuanpeng,et al
2017, 37 (3): 39-45. DOI:10.3969/j.issn.1672-6952.2017.03.009
Abstract ( ) PDF ( 4363KB ) ( ) 　　
        In order to effectively and rapidly develop the offshore fluvial faces oilfield, the development pattern of the oilfield is investigated from four aspects which are based on the features of geology and development for Bohai Y oilfield. The four aspects include, fine water injection to maintain formation pressure, combine and divide layer series of development by single sand body, well pattern optimization technology for single sand body and comprehensive adjustment by combining water extraction and water control. Development effects for each single development index developed at the development pattern of Bohai Y oilfield are calculated by reservoir engineering methods. Then the comprehensive development effects are evaluated. Results manifest that, development pattern of Bohai Y oilfield is suitable for most offshore fluvial faces oilfield. The development period  can effectively shorten the development period of offshore oil fields and improve the ultimate recovery of oil field by applying this development pattern.
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Finite Element Strength Analysis of the Quick Opening Container's Meshing Tooth with Combined Meshing Degree

Cong Xiangchun，Zhang Ying，Wang Bing，Liu Yanlei，Gao Han

2017, 37 (3): 46-50.

Abstract ( ) PDF ( 1771KB ) ( ) 　　

        Tooth-locked quick-opening pressure vessel is widely used. The fast opening structure was an important part of the pressure vessel door opening and closing operation and the meshing degree of the tooth determined the safe of the container's operation. A tooth-meshing autoclave was taken as an example and the finite element analysis was used as a method to carry on the numerical simulation to its meshing tooth in load condition and the strength check to its dangerous path. In the case of the incomplete meshing in the circumferential direction, the incomplete meshing in the radial direction and the combined operation in which the two directions were not fully meshed. According to the analysis results, it could be seen that with the decrease of meshing tooth circumferential or radial meshing degree, the stress increased. Under the dangerous working condition of combined meshing (i.e.circumferential meshing degree was 80%, radial dislocation was 3.0 mm)，the tooth's stress reached the maximum. After the strength check, the primary local membrane stress exceeded the allowable value, so the stress didn't meet the requirements. According to the analysis results, the quick-opening container should be avoided to working with incomplete meshing tooth to ensure the safe use.

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Improvement on the Coupling Method for Rock Ultrasonic Probetoa Test Piece
Han Zhen,Zhang Deqi,Wu Qiang,Zheng Xuhui
2017, 37 (3): 51-53. DOI:10.3969/j.issn.1672-6952.2017.03.011
Abstract ( ) PDF ( 2525KB ) ( ) 　　
        A brief description of using ultrasonic was given to test loosened rock circles and the existing problems were discussed such as uphole, suction expansion hole and water leakage hole presented in the water coupling testing through the analysis of the mechanism of probe coupling based on the ultrasonic reflectivity theory. It was compared and analyzed that the method of sealing water injection, coupling methods of cream coupling agent, capsule ultrasonic probe and a new coupling method of three-capsule ultrasonic probe was proposed and it was successfully used in the engineering applications for Pingshuo coal industry limited liability company, China. The result showed that this method was simple, convenient and feasible.
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Near Infrared CO Spectra Acquisition and Modeling Method Research
Wang Jinming,Yu Jinyuan,Li Zhonghu
2017, 37 (3): 54-57. DOI:10.3969/j.issn.1672-6952.2017.03.012
Abstract ( ) PDF ( 2020KB ) ( ) 　　
        This article is about the study of portable fiber optic spectrometer CO detection technology. The detection system were built by used small optical fiber spectrometer as the core ，and the spectrum signal used wavelet transform to preprocess. Processed CO spectral feature extraction based on the information using a gaussian fitting method and CO in the characterization of eigenvalues are obtained by fitting the spectral information， finally a precise mathematical model were established by using partial least squares method and principal component analysis (PCA) . The method can fast and extractly characterize information from spectral signal and build the CO detection model .
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Simulation of Dune Vegetationunder Natural Conditions Based on Fractal and Graphics
Liu Yun,Zhang Yan
2017, 37 (3): 58-63. DOI:10.3969/j.issn.1672-6952.2017.03.013
Abstract ( ) PDF ( 9405KB ) ( ) 　　
        Under the natural conditions，the shape of sand dunes is varied and the natural conditions of the sand dunes are very poor， and the vegetation on which they live depends is often on different states. The computer graphics and fractal geometry were used to simulate the growth of dune and vegetation. Through the function iteration system,it can achieve a single tree and forest of the morphological simulation,and also simulation the trees in the dune growth by bolding the branches. The color of trees is divided by the method of tracing the affine transformation points to achieve the color of trees changing with the season. Using computer graphics to draw flowers and the random function to replace some of the points on the trees for flowers，little flower of trees was simulated. Using the combination of different phases of the sine curve the dune is drawn and then the dune vegetation scene is simulated by combining with the trees. The external factors are used to simulate the natural shape of the dune windward slope under natural conditions. Finally,by increasing the density of dune and the number of trees to expand the area of trees the local forest scene simulation is generated.
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Aluminum Foil Sealing Seal Detection Based on Gabor Transformation and Extreme Learning Machine
Chang Jiaming,Li Weijun,Shi Chengjiang
2017, 37 (3): 64-69. DOI:10.3969/j.issn.1672-6952.2017.03.014
Abstract ( ) PDF ( 3077KB ) ( ) 　　
        After the research on the distribution characteristic of temperature field for aluminum seal , a kind of inspection method for the sealing based on Gabor transformation and extreme learning machine (ELM) was proposed. The Gabor transformation was conducted on various thermal images ，and the textural features are extracted to train the ELM neural network. Then the training results are used to classify and identify the thermal images， and the sealing of aluminum seal could be judged through the classification features of the thermal images. Compared and analysed with BP neural network which extracts color features，it is found that the algorithm based on Gabor transformation and ELM has the advantages of strong generalization，fast response speed，high precision，etc.
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Characteristics and Economic Analysis of Natural Gas Utilization in Northeast Petrochemical Enterprises
Zhao Qiang,Wang Long,Cui Lin,Wang Weiqiang,Wang Guofu
2017, 37 (3): 70-75. DOI:10.3969/j.issn.1672-6952.2017.03.015
Abstract ( ) PDF ( 1553KB ) ( ) 　　
Petrochemical enterprises in Northeast China mainly produced fuel hydrogen from natural gas; the gas units included crude distillation unit, reforming unit, hydro-treating unit, catalyst unit, ethylene unit, delayed coking unit, molecular sieve dewaxing unit, benzene and styrene unit. About （25~30）×10⁴ m³ gas was consumed for one petrochemical enterprise processing ten million tons of crude oil per annum. The main factors that affected the total amount of natural gas consumption included alternative energy, seasonal variation, maintenance, market, emergencies, etc. The calculation of natural gas price bearing capacity with the surrogate worth trade off method showed the price of alternative energy such as naphtha and liquefied gas directly affected the economy of natural gas utilization. Clarifying the use regulation and economic characteristics of nature gas in petrochemical enterprises was conducive to optimizing the plan design of gas utilization, controlling cost and coordinating with the upstream gas suppliers.
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Construction of the Three Northeastern Provinces of Listed Company's Internal Control Evaluation System#br#
Bi Wensi,Wang Lihua
2017, 37 (3): 76-80. DOI:10.3969/j.issn.1672-6952.2017.03.016
Abstract ( ) PDF ( 1034KB ) ( ) 　　
        Taking the three northeastern provinces in Shanghai and Shenzhen 112 listed companies as the sample, based on the level of internal controls to achieve objectives and by means of analytic hierarchy process, the internal control evaluation system was established quantitatively and the operation was tested by economic efficiency indicators. Compared with 112 listed companies internal control system and its analysis of economic indicators, the results showed that most companies which were of better quality internal control obtained economic efficiency. Therefore the internal control system established quantitatively by the main financial indicators was of a certain practicality and application value.
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