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The simulation experiment of Ethanol Separation from Fermentation Broth by Gas Stripping

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Advances in Manufacturing 1997年第2期 168-173页

作者：沈文豪

The feasibility of ethanol separation from ethanol-water solution saturated with glucose by gas strippingis showil theoretically and experimentally. The effects of glucose on the saturated vapor pressure of ethanol, a... 详细信息

关键词： fermentation broth gas stripping simulation experiment

simulation experiments of Land Surface Physical Processes and Ecological Effect over Different Underlying Surface

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地球科学进展 2004年第S1期19卷 15-20页

作者： LIU Shu-hua~(1,2), JIANG Hao-yu, HU Fei~2 LIU Hui-zhi~2 LIANG Fu-ming~1, WANG Jiang-hua~1(1. Group of Atmosphere Boundary Layer and turbulence, Ministry Laboratory of Storm and Drought Flood Damage, Department of Atmospheric Sciences the School of Physics Peking University, Beijing 100871, China 2. State Key Laboratories of Atmosphere Physics and Chemistry, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029, China)

Based on the existing Land Surface Physical Process Models(Deardorff, Dickinson, LIU, Noilhan, Seller, ZHAO), a Comprehensive Land Surface Physical Process Model (CLSPPM) is developed by considering the different physical processes of the earth's surface-vegetation-atmosphere system more completely. Compared with SiB and BATS, which are famous for their detailed parameterizations of physical variables, this simplified model is more convenient and saves much more computation time. Though simple, the feas...

关键词： Comprehensive land surface Physical process model (CLSPPM) simulation experiment Land surface physical process Ecological effect.

Simulative technology for auxiliary fuel tank separation in a wind tunnel

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Chinese Journal of Aeronautics 2016年第3期29卷 608-616页

作者： Ma Xin Liu Wei Chen Ling Li Xiao Jia Zhenyuan Shang Zhiliang Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education Dalian University of Technology

In this paper, we propose a simulative experimental system in wind tunnel conditions lbr the separation of auxiliary fuel tanks from an aircraft. The experimental system consists of a simulative release mechanism, a scaled model and a pose measuring system. A new release mechanism was designed to ensure stability of the separation. Scaled models of the auxiliary fuel tank were designed and their moment of inertia was adjusted by installing counterweights inside the model. Pose param- eters of the scaled model were measured and calculated by a binocular vision system. Additionally, in order to achieve high brightness and high signal-to-noise ratio of the images in the dark enclosed wind tunnel, a new high-speed image acquisition method based on miniature self-emitting units was pre- sented. Accuracy of the pose measurement system and repeatability of the separation mechanism were verified in the laboratory. Results show that the position precision of the pose measurement system can reach 0.1 mm, the precision of the pitch and yaw angles is less than 0.1° and that of the roll angle can be up to 0.3°. Besides, repeatability errors of models＂ velocity and angular velocity controlled by the release mechanism remain small, satisfying the measurement requirements. Finally, experiments for the separation of auxiliary fuel tanks were conducted in the laboratory.

关键词： Aircraft auxiliary equipmentBinocular vision Position and attitude mea-surement Release mechanism simulation experiment

Time Optimization of Multiple Knowledge Transfers in the Big Data Environment

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Computers, Materials & Continua 2018年第3期54卷 269-285页

作者： Chuanrong Wu Evgeniya Zapevalova Yingwu Chen Feng Li School of Economy and Management Changsha University of Science&TechnologyChangsha410114P.R.China College of Information System and Management National University of Defense TechnologyChangsha410073China School of Computer&Communication Engineering Changsha University of Science&TechnologyChangsha410114China

In the big data environment, enterprises must constantly assimilate big dataknowledge and private knowledge by multiple knowledge transfers to maintain theircompetitive advantage. The optimal time of knowledge transfer is one of the mostimportant aspects to improve knowledge transfer efficiency. Based on the analysis of thecomplex characteristics of knowledge transfer in the big data environment, multipleknowledge transfers can be divided into two categories. One is the simultaneous transferof various types of knowledge, and the other one is multiple knowledge transfers atdifferent time points. Taking into consideration the influential factors, such as theknowledge type, knowledge structure, knowledge absorptive capacity, knowledge updaterate, discount rate, market share, profit contributions of each type of knowledge, transfercosts, product life cycle and so on, time optimization models of multiple knowledgetransfers in the big data environment are presented by maximizing the total discountedexpected profits (DEPs) of an enterprise. Some simulation experiments have beenperformed to verify the validity of the models, and the models can help enterprisesdetermine the optimal time of multiple knowledge transfer in the big data environment.

关键词： Big data knowledge transfer time optimization DEP simulation experiment

The square rod-shaped ionic polymer-metal composite and its application in interventional surgical guide device

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International Journal of Smart and Nano Materials 2020年第2期11卷 159-172页

作者： Qingsong He Kai Huo Xianrui Xu Yinghao Yue Guoxiao Yin Min Yu Jiangsu Provincial Key Laboratory of Bionic Functional Materials Institute of Bio-inspired Structure and Surface EngineeringCollege of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina College of Astronautics Nanjing University of Aeronautics and AstronauticsNanjingChina

Ionic polymer-metal composite(IPMC)is an electro-active polymer material,which has many advantages such as small size,light weight,low driving voltage,large strain,and good biocompatibility.However,the conventional sheet IPMC has the shortcoming of only bending in the two-dimensional plane,which greatly limits the application of IPMC in the field of interventional surgery.In this work,a square rodshaped IPMC with multi-degree-of-freedom motion was fabricated,and the displacement and blocking force of the square rod-shaped IPMC in different directions are measured and analyzed under the DC voltage signal.An interventional catheter was designed using the square rod-shaped IPMC in order to achieve active guidance,and a simulation experiment platform and a model of human aorta were built to successfully complete the in vitro simulation experiment of interventional surgery,which preliminarily verified the feasibility of the square rod-shaped IPMC in the field of interventional surgery.

关键词： Square rod-shaped IPMC guiding device interventional surgery simulation experiment

Composition and Evolution of Hydrogen Isotopes of n-Akanes Generated from Anhydrous Pyrolysis of Sediments from Lake Gahai,Gannan,China

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Acta Geologica Sinica(English Edition) 2021年第5期95卷 1725-1735页

作者： DUAN Yi WU Yingzhong XING Lantian LI Zhongping ZHANG Ting Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences and Gansu Provincial Key Laboratory of Petroleum ResourcesLanzhou 730000China School of Earth Science&Resources Chang’an UniversityXi’an 710054China Shaanxi Center of Mineral Geological Survey Xi'an 710068China

To understand the thermal evolution of lacustrine sedimentary n-alkane hydrogen isotopic composition(δD),especially bacterially derived n-alkanes,anhydrous thermal simulation experiments were performed with sediments from Lake Gahai(Gannan,China).We analyzed the original and pyrolysis-generated n-alkanes and theirδD values.The results showed that thermal maturity and n-alkane origins significantly affected the distribution of pyrolysis-generated n-alkanes.In immature to post-mature sediments,the bacterial-derived medium-chain n-alkanes generally had depletedδD values.The maximum difference in averageδD values between the bacterial-and herbaceous plant-derived medium-chain n-alkanes was 32‰,and the maximum difference in δD values among individual n-alkanes was 59‰.We found that the averageδD value of pyrolysis-generated n-alkanes from different latitude was significantly different in immature to highly mature sediments,but similar in post-mature ssediments.The hydrogen isotopes of sedimentary n-alkanes can be used as indicators for paleoclimate/paleo-environment conditions only when sediments are immature to highly mature.During thermal evolution,the δD value of generated individual n-alkanes and the averageδD value increased with thermal maturity,indicating that hydrogen isotopes of sedimentary n-alkanes can be used as an index of organic matter maturity.We established mathematical models of average δD values of generated n-alkanes from immature to post-mature sediments using n C_(21)^(-)/nC_(21)^(+)and average chain lengths.These results improve our understanding of the distribution andδD value of sedimentary n-alkanes derived from herbaceous plants in mid-latitude plateau cold regions.

关键词： freshwater lake sediment n-alkane simulation experiment bacterial origin hydrogen isotope thermal evolution

simulation experiments on the Reaction of CH_4-CaSO_4 and Its Carbon Kinetic Isotope Fractionation

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Petroleum Science 2005年第1期2卷 82-85页

作者： YueChangtao LiShuyuan DingKangle ZhongNingning StateKeyLaboratoryofHeavyOilProcessing UniversityofPetroleumBeijing102249China

Thermochemical sulfate reduction (TSR) in geological deposits can account for the accumulation of H2S in deep sour gas reservoirs. In this paper, thermal simulation experiments on the reaction of CH4-CaSO4 were carried out using an autoclave at high temperatures and high pressures. The products were characterized with analytical methods including carbon isotope analysis. It is found that the reaction can proceed to produce H2S, H2O and CaCO3 as the main products. Based on the experimental results, the carbon kinetic isotope fractionation was investigated, and the value of Ki (kinetic isotope effect) was calculated. The results obtained in this paper can provide useful information to explain the occurrence of H2S in deep carbonate gas reservoirs.

关键词： Thermochemical sulfate reduction (TSR) hydrogen sulfide (H2S) simulation experiment carbon kinetic isotope fractionation

Hydrocarbon Generation Kinetic Characteristics from Different Types of Organic Matter

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Acta Geologica Sinica(English Edition) 2011年第3期85卷 702-711页

作者： WANG Min LU Shuangfang XUE Haitao WANG Weiming LIU Min DONG Qi WANG Guihua Earth Science Institute Northeast Petroleum University HeiIongjiang 163318 China Chongqing Divison CNPC Logging Shanxi 710201 China

In order to contrast the hydrocarbon generation kinetic characteristics from different types of organic matter（OM）,18 samples from different basins were pyrolyzed using Rock-Eval-Ⅱapparatus under the open system.From the experimental results,the curve of hydrocarbon generation rate vs.temperature can be easily obtained,which usually can be used to optimize kinetic parameters （A,E,F）of the hydrocarbon generation model.In this paper,the parallel first-order reaction with a single frequency factor model is selected to describe the hydrocarbon generation kinetic characteristics. The hydrocarbon generation kinetic parameters reveal that the types of compound structures and chemical bonds of the lacustrine fades typeⅠOM are relatively homogeneous,with one dominating activation energy.The types of chemical bonds of the lacustrine facies typeⅡ2 OM and the terrestrial facies typeⅢOM are relative complex,with a broad activation energy distribution,and the reaction fraction of the preponderant activation energy drops with the decrease of hydrogen index.The impact of the activation energy distribution spaces on the geological extrapolation of kinetic parameters is also investigated.The results show that it has little effect on the hydrocarbon transformation ratio（TR）and therefore,the parallel first-order reaction model with proper number of activation energies can be better used to describe the hydrocarbon generation process.The geological extrapolation results of 18 samples of kinetic parameters show that the distribution range of the hydrocarbon generation rate of the typeⅠOM is relatively narrow and the hydrocarbon generation curve is smooth.In comparison,the distribution range of the hydrocarbon generation for typeⅢand typeⅡ2-ⅢOM are quite wide,and the hydrocarbon generation curves have fluctuation phenomena.The distribution range of the hydrocarbon generation rate and the fluctuation phenomena are related to the kinetic parameters of OM;the narrower the activation energy distribution,the narrower the hydrocarbon generat

关键词： kinetic characteristics simulation experiment type of organic matter activation energy hydrocarbon generation rate

Resistivity tomography study on samples with water-bearing structure

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Acta Seismologica Sinica(English Edition) 2000年第3期13卷 325-330页

作者：郝锦绮冯锐周建国钱书清高金田 Institute of Geophysics China Seismological Bureau Beijing China Opening Laboratory of Tectonophysics China Seismological Bureau Beijing China Center for Seismological Data and Information China Seismological Bureau Beijing China

The apparent resistivity of the samples with water-bearing configuration was measured by an electrode-array and 2-D resistivity images of these samples were reconstructed then. The obtained series of tomograms reveal the dis tribution and its variation of true resistivity within the samples caused by the changes of crack and liquid distribu tion. Applying this method to the simulation experiment on the electrical properties of rocks, the fracturing and water filling process, which produces the electrical changes, can be brought to light clearly.

关键词： resistivity tomography simulation experiment water-bearing state