Syntheisi of Methanol through Partial Oxidation of Low-Concentration Coal Mine Gas in Liquid Phase Catalyzed by Pt(bipy)Cl2
Development of Deep Desulfurization Process for FCC Gasoline
The classic hydrodesulfurization technology and nonhydrodesulfurization process such as adsorption desulfurization technology and alkylation desulfurization process have been analyzed and summarized at home and abroad. Catalytic hydrogenation desulfurization technology has been widely used in industry, while the non hydrogenation desulfurization process is receiving more and more people's attention.
Synthesis of CuS by Elemental-Direct-Reaction in Deep Eutectic Solvents and Test on Photocatalytic Performance
Extractions of Proanthocyanidins from Peanut Red Skin
The original anthocyanins from peanut skin can be extracted by using ultrasonic assisted solvent extraction, and the extraction conditions of anthocyanins can be optimized by response surface methodology. Based on the single factor test analysis and Box-Behnken experimental design principle, the optimal conditions which is suitable for the production of the peanut red skin proanthocyanidins was chosen according to the response surface methodology as follows: ethanol concentration is 70%, the solid-liquid ratio is 1∶50, ultrasonic power is 153 W, ultrasonic time is 8 min, the boiled temperature is 60 ℃, the boiled time is 50 min and extraction once. Under this optimum conditions, proanthocyanidins yield is 153.63 mg/g and is very close to the mode expected value 154.33 mg/g.
Analysis of the Stress Influence on Buried Pipelines under the Action of Axial Landslide
The freezing-thawing circulation was the most common security problems of buried pipeline in permafrost regions, and it could make pipeline generate additional stress. For the regional with the special structure of topographic, the freezing-thawing circulation would change the original geological characteristics, and caused geological disasters under certain conditions. The stress impact of the pipeline was studied generated by the freezing-thawing landslide because of the melting permafrost. The degree of influence of axial landslide with different displacement on the pipeline was analyzed. The simulation analysis showed that different forms of landslide generated a great impact on the pipelines; furthermore, the effects of stress on the pipeline had a greater impact by changing the location of the landslide. The influence on the pipelines generated by the freezing-thawing landslide were simulated and analyzed ,which could well reflect the changes in stress and provide a theoretical basis for building construction of buried pipelines in the permafrost regions.
Research and Application of Polyamine Water-Based Drilling Fluid for Long Open Hole Interval in Tahe Oilfield
Wellbore instability of long open hole interval in the drilling operation of Tahe oilfield is prominent in recent years. The structures, physical and chemical properties of typical shale samples from targeted zone were characterized firstly. The wellbore instability of long open hole interval of Tahe oilfield was analyzed with the combination of shale sample characterization and field operation. Meanwhile, the strategies of drilling fluid technology were proposed. Two water-based drilling fluid formulas were optimized in laboratory according to the characteristics of up and bottom formation of Tahe oilfield. Polyamine polymer drilling fluid system was chosen for the up formation, it can resistant 10%NaCl, 5%bentonite, 1%CaCl2, 1%CaSO4 and the shale recovery was above 75%. Polyamine polysulfonate drilling fluid was chosen for the bottom formation. It can resistant 5%NaCl, 5%bentonite, 1% CaCl2, 1% CaSO4 and the shale recovery was above 85%. The optimized two formulas in laboratory were applied in the field respectively. The application results indicated that polyamine polymer drilling fluid could effectively suppress the shale hydration and swell in the up formation, and the average hole diameter enlargement rate in test well was 4.47%. Polyamine polysulfonate drilling fluid could effectively prevent the caving and flaking, and the average hole diameter enlargement rate in test well was 9.42%. The wellbore stability was improved, and the comprehensive benefits were improved.
Fracture height control is a key factor for the development of low permeability reservoir, especially for the thin and poor quality zones. Aiming at the challenges of poor capping rock and ample muddy interbedding of formation of block Lu44 in Huabei Oilfield, secondary sanding fracturing technology are conducted as a way of stimulation. The secondary sanding fracturing technology can make a contribution to fracture height control has been proved by using the fracture height migration model. Through FracproPT software, the fracture height is compared between secondary sanding fracturing and conventional fracturing. At the same time, based on the result of numerical simulation, the reasonable fracturing parameters, including second sand volume, second preflush ratio, pump off time and delivery rate, are optimized. The secondary sanding fracturing has a good adptability in Huabei Oilfeild and better production in other wells.
Comparative Analysis of Fluid Flow and Mixing Characteristics between Three Kinds of Rotor Mixer
The finite element method was used to compare and analyze fluid flow and mixing characteristics between three kinds of rotor mixer, 4WS,4WH and 6WI.The UG software was used to build 3D geometry models. The Gambit software was used to be grid division. And model was used to simulate the flow field of three kinds of internal mixer by BirdCarreau constitutive model and Polyflow software. By comparing the average velocity, the axial velocity and the shear rate, the flow patterns of the three flow fields were obtained. At the same time, the distribution of the mixture of the three parameters was described by using the parameters of the particle index, the average logarithmic stretch index, the probability of the particle index, the average mixing efficiency and the residence time distribution. The simulation results showed that, because of the special variable clearance rotor structure of 6WI rotor mixer, the flow field was more easily changed, and its mixing performance was higher than that of the other two kinds of rotor mixer.
Axial Compression Impact Analysis of the Concrete Strength to GFRP-Concrete-PVC Tube Column
The steel pipe was eroded easily in the acid alkali chemical environment and damp environment. In order to improve the durability and bearing capacity of the structure, the GFRP-concrete-PVC tube new type composite column was put forward on the basis of the research of steel tubular concrete column and GFRP tube concrete column. The GFRP-concrete-PVC tube column was designed to analyze the composite column axis pressure performance and the ANSYS for GFRP-concrete-PVC tube column was used to analyze the assembly axial compression column numerically. The results showed that the bigger was the concrete strength, the bigger was ultimate bearing capacity of GFRP-concrete-PVC tube composite column, but the smaller was the increasing-rate of bearing capacity. With the increase of concrete strength, the constraints ferrule effect of GFRP outer tube to core concrete was reduced. The composite column constraint ability was the largest when concrete strength was C30, the ferrule constraint factor was 2.31.
Thermal Stress Analysis and Safe Assessment of the Fin-Tube
Study on the Interface of Monitoring Configuration Software Based on SVG
The graphical interface is one of the basic components of the monitoring configuration software, which has a great impact on the software. However, a variety of configuration software currently used different graphic styles to form the monitor screen, so that different systems interact difficultly. To overcome this shortcoming and improve the reusing rate of code writing monitor screen and enhance applications efficiency of dealing with a lot of graphics information, this paper sets up a monitoring graphics elements library of configuration software, which uses SVG recommended by the international image formats of monitoring interface, and elaborates the way to define equipment element property. Integrating Batik project of ASF (Apache software foundation) and adopting Object Orient Design Thought, the paper analyses and designs the monitoring graphics elements library module of configuration software. Configuring graph's properties as the corresponding with relational SQL datebase which facilitate the programmer inputs data, can improve the total level of the configuration software.
Data Acquisition and Processing System of PSO Based on Nonlinear Reset Particle Swarm Algorithm
In order to improve the opacity of data collection, the complexity of each operating segment links and coarse tuning parameters manually in the process of data collection and analysis in the lad, a set of complete data collection and analysis system was designed by using data acquisition card of serial port and two channel, nonlinearity reset PSO algorithm and harmonious human-computer interaction interface. The working principles of frequency response data acquisition and data processing system, the composition structure and operation instructions were introduced. Equipment control and data acquisition were carried out after frequency instruction given by lower machine data acquisition system, the data was transmitted through the serial port communication to upper computer then through the Fourier transform into a data processing system. Test results showed that the system could collect data timely and accurately, display data in real time, process and save data automatically and precisely. The system was stable in testing process which guaranteed the accuracy of the data analysis.
Analysis of Real Estate Project Financing Risk Evaluation
The project financing was a kind of important international financial tools, used in commercial real estate field, and was a kind of brand-new exploration. With the continuous development and deepening of economic restructuring, the development of China's real estate industry gradually became an important pillar of China's economic development, and was paid close attention by domestic and foreign personnel. Currently, there were many financing ways of the real estate project, but there were still many problems in financing risks which finally led to the entire project failure and brought great loss to China's economy. The real estate project financing risks were large and complex, but the fuzzy evaluation model could be established to analyze the risks through the summary on the financing risk of real estate project. The use of It was a large system of a multi-objective, multi-level, complex structure and factors to use fuzzy comprehensive evaluation method to evaluate the financing risk of commercial real estate project, and the system could do a very good interpretation and analysis of the financing risk of real estate project. As the real estate project selection, it was an important basis of financing scheme to reduce unnecessary loss for the real estate project financing.