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2018 petroleum & chemical industry development report

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Chinese journal of Chemical Engineering 2019年第10期27卷 2606-2614页

作者： Chunyang zeng Qianlin Hu Chemical Industry Productivity Promotion Center of China Beijing 100723China China Petroleum Chemical Industry Federation Beijing 100723China

In 2018,the petroleum and chemical industries of China achieved steady economic *** main business income of the entire industry was 12.4 trillion CNy,an increase of 13.6%over the previous *** total profit was 83.93 billion CNy,an increase of 32.1%over the previous *** total national oil and gas production reached 334 million tons of oil equivalent,increasing by 2.4%*** the total production,crude oil production was 189 million tons,decreased 1.2%,and natural gas production was 161.02 billion cubic meters,increased 7.5%year on *** crude oil production was 462 million tons,an increase of 10.1%over the last *** gas production was 125.72 billion cubic meters,increased 31.9%.The annual processing capacity of crude oil was 604 million tons,up by 6.8%.The refined oil production was 360 million tons,up by 3.6%.The industry structure was optimized for production growth in 2018,the transformation and upgrading of enterprises and products structure adjustment were sped up,energy efficiency was improved,and overall industrial benefit was *** present,the economic operation of the industry is still not very stable,and downward pressure is still great,mainly being reflected in the overcapacity of some industries,high cost operation of enterprises,increased tax burden,and weak *** the slow recovery of the global economy and the key support of high-quality development through technological innovation,it is expected that the petroleum and chemical industry of China will achieve the general objective of steady growth in 2019.

关键词： China Petroleum and chemical industry Profit Main business income Production Consumption Technological innovation

Entransy dissipation analysis of interfacial convection enhancing gas–liquid mass transfer process based on field synergy principle

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Chinese journal of Chemical Engineering 2019年第8期27卷 1777-1788页

作者： Dong Li Aiwu zeng State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University

An exploration of the gas CO2 absorbed into liquid ethanol accompanied with Rayleigh convection is performed by analyzing the mass entransy dissipation;this new statistical quantity is introduced to describe the irreversibility of mass transfer potential capacity. Based on the general advection–diffusion differential equation for an unsteady mass transfer process, the variation of the included angle between the velocity vector and concentration gradient fields is investigated to reveal the underlying mechanism of interfacial convection enhancing mass transfer. Results show some identical characteristics with the qualitative analyses of the synergy effects generated by the concentration and velocity fields after interfacial convection occurring for a boundary condition of fixed surface concentration. And the equivalent mass resistance for convective mass transfer process presents the similar variation with the reciprocal of instantaneous mass transfer coefficient. Accordingly, it is reasonable to be seen that mass transfer dissipation rate could be provided to assess the convection strength and explain fundamentally how Rayleigh convection improves mass transfer performance through establishing a close relationship between the mass transfer capacity and field synergy principle from the view of mass transfer theory.

关键词： Field synergy Mass entransy dissipation Equivalent mass resistance Interfacial convection Reinforcement

Integrated dynamic shared protection algorithm for GMPLS networks

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journal of Systems Engineering and Electronics 2008年第6期19卷 1264-1271页

作者： Wang yan zeng jiazhi Coll. of Computer Science and Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China

The path protection approach is widely investigated as a survivability solution for GMPLS networks, which has the advantage of efficient capacity utilization. However, there is a problem of the path protection approach that searching a disjoint backup path for a primary path is often unsuccessful. In order to resolve this problem, an integrated dynamic shared protection （IDSP） algorithm is proposed. The main idea of the proposed algorithm is that the path protection approach is first used to establish a backup path for the primary path; if the establishment is unsuccessful, then the primary path is dynamically divided into segments whose hop count are not fixed but not more than the limitation calculated by the equations introduced. In this proposal, backup bandwidth sharing is allowed to improve the capacity utilization ratio, which makes the link cost function quite different from previous ones. Simulation experiments are presented to demonstrate the efficiency of the proposed method compared with previous methods. Numerical results show that IDSP can not only achieve low protection failure probability but can also gain a better tradeoff between the protection overbuild and the average recovery time.

关键词： generalized multi-protocol label switching protection hop count primary path backup path

Delamination of lamellar phyllosilicate Magadiite

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Chinese Science Bulletin 2010年第23期55卷 2584-2588页

作者： BI yunFei BLANCHARD j LAMBERT j-F MILLOT y MAN P P zeng ShuangQin NIE Hong LI DaDong LI MingFeng yANG QingHe CHEN XiaoXin Research Institute of Petroleum Processing SINOPEC Beijing 100083 China UPMC Univ Paris 06 UMR 7197 Laboratoire de Reactivite de Surface Paris F-75005 France CNRS UMR 7197 Laboratoire de Reactivite de Surface Paris F-75005 France

In this paper,a new delaminated mesoporous material was prepared by swelling the lamellar phyllosilicate Magadiite using cetyltrimethylammonium bromide and tetrapropylammonium hydroxide solution,followed by delamination under the cavitation of ultrasonic *** characterization tools including XRD,N2 adsorption,NMR,IR,SEM and TEM were employed to observe its structure and *** results show that the delaminated material has no long-range crystalline ***,not only high surface area is obtained,but almost half of it is external *** observation for the morphology further reveals that it is made up of the random stacking of single or few *** these characters show that this delaminated mesoporous material meets the requirements for application as support in the hydrotreatment of heavy molecules.

关键词：层状硅酸盐脱层片层超声空化处理透射电镜观察形态观察介孔材料 X射线衍射

Two-dimensional numerical algorithm for water quality modeling in the topographically complicated river

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journal of Environmental Sciences 2000年第4期12卷 469-473页

作者： zeng, G. jiang, y. Guo, H. Huang, G.G.-H. Environmental Protection Institute Human University Hunan 410082 China

In this paper, a two-dimensional numerical calculation algorithm for the water quality modeling in the Hengyang City section of the Xiangjiang River is researched considering the effect of the Dayuandu navigational key project. The research river is winding and has two branches resulted from an isle. The numerical calculation algorithm for the water quality modeling is set up on the basis of applying topographic map of the river course and the finite element method. The calculation result for the water quality modeling includes the concentration fields for various pollutants. The numerical calculation algorithm for the water quality modeling set up in this paper can be applied to shallow river with similar topographically complicated river course.

关键词： Algorithms Finite element method River pollution Rivers

A generic framework for geotechnical subsurface modeling with machine learning

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journal of Rock Mechanics and Geotechnical Engineering 2022年第5期14卷 1366-1379页

作者： jiawei Xie jinsong Huang Cheng zeng Shan Huang Glen j.Burton Discipline of Civil Surveying and Environmental EngineeringPriority Research Centre for Geotechnical Science and EngineeringThe University of NewcastleCallaghanNSW2308Australia ATC Williams Pty.Ltd. SingletonNSW2330Australia

This study introduces a generic framework for geotechnical subsurface modeling, which accounts for spatial autocorrelation with local mapping machine learning(ML) methods. Instead of using Xy coordinate fields directly as model input, a series of autocorrelated geotechnical distance fields(GDFs) is designed to enable the ML models to infer the spatial relationship between the sampled locations and unknown locations. The whole framework using GDF with ML methods is named GDF-ML. This framework is purely data-driven which avoids the tedious work in the scale of fluctuations(SOFs)estimating and data detrending in the conventional spatial interpolation methods. Six local mapping ML methods(extra trees(ETs), gradient boosting(GB), extreme gradient boosting(XGBoost), random forest(RF), general regression neural network(GRNN) and k-nearest neighbors(KNN)) are compared in the GDF-ML framework. The results show that the GDFs are better than the conventional Xy coordinate fields based ML methods in both accuracy and spatial continuity. GDF-ML is flexible which can be applied to high-dimensional, multi-variable and incomplete datasets. Among these six methods, GDF with ET method(GDF-ET) clearly shows the best accuracy and best spatial continuity. The proposed GDF-ET method can provide a fast and accurate interpretation of the soil property profile. Sensitivity analysis shows that this method is applicable to very small training dataset size. The associated statistical uncertainty can also be quantified so that the reliability of the subsurface modeling results can be estimated objectively and explicitly. The uncertainty results clearly show that the prediction becomes more accurate when more sampled data are available.

关键词： Site investigation Machine learning(ML) Spatial interpolation Geotechnical distance fields(GDFs) Tree-based models

MAGNETORESISTANCE EFFECT OBSERVED IN Fe/Mo MULTILAyERS PREPARED By ELECTRON BEAM EVAPORATION

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Acta Metallurgica Sinica(English Letters) 2003年第3期16卷 237-240页

作者： T.He B.Zhao y.Gao F.zeng F.Pan Laboratory of Advanced Materials Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084 China

The Fe/Mo multilayers were prepared by electron beam evaporation, the micro structure and magnetic properties of the multilayers were studied by X-ray diffraction, vibrating-sample magnetometer (VSM) et al. The experimental results revealed that the Fe/Mo multilayers in our experimental conditions behaved magnetoresistance effect with a sharp peak on magnetoresistance (MR) ratio curve, and magnetoresistance is easily saturated at low applied magnetic fields. For [Fe(1.5nm)/Mo(1.0nm)]4,2 multilayers, MR ratio could arrive to 0.1%. The antiferromagnetic interlayer coupling could be observed in some films at room temperature. The strength of the antiferromagnetic interlayer coupling j in the films is low because of the low saturation field Hs. The relationship between magnetic properties and micro structure was also discussed in this paper.

关键词： magnetoresistance multilayer antiferromagnetic interlayer coupling nonmagnetic scattering

Mapping Sea Level Rise Behavior in an Estuarine Delta System：A Case Study along the Shanghai Coast

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Engineering 2018年第1期4卷 156-163页

作者： H.Q. Cheng j.y. Chen Z.j. Chen R.L. Ruan G.Q. Xu G. zeng j.R. Zhu Z.j. Dai X.y. Chen S.H. Gu X.L. Zhang H.M. Wang State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai 200062 China Shanghai Water Planning Design and Research Institute Shanghai 200232 China Shanghai Water Authority Shanghai 200050 China School of Urban and Regional Science East China Normal University Shanghai 200062 China School of Ecological and Environmental Sciences East China Normal University Shanghai 200062 China Shanghai Hydrological Station Shanghai 200232 China Shanghai Municipal Bureau of Urban Planning and Land Resources Shanghai 200003 China Shanghai Institute of Geological Survey Shanghai 200072 China

Sea level rise （SLR） is a major projected threat of climate change that is expected to affect developing coastal cities located in estuarine delta regions, Shanghai is one such city, being located in the yangtze River Delta （yRD）, It is difficult, however, for decision-makers to implement adaptation due to the uncer- tain causes, magnitudes, and timings of SLR behaviors, This paper attempts to map the causes and mag- nitudes of SLR behaviors on a decadal scale, We analyze the tidal level records from 11 tidal gauge stations and the corresponding bathymetry measurements around these stations since 1921, We identify three new SLR behaviors along the Shanghai coast due to anthropogenic geomorphologic changes （AGCs）, besides the well-known eustatic sea level rise （ESLR）, tectonic subsidence （TS）, and urban land subsidence （ULS）, The first new behavior is regional sea level rise （RSLR）, which occurs as a result of land reclamation and deep waterway regulation, The second is regional sea level fall （RSLF）, which occurs because the channel bed is eroded due to sediment supply decline in the river catchment, The last SLR behavior is local tidal datum rise （LTDR）. Thus, we project that the magnitude of SLR for the Shanghai coast ranges from 10 cm to 16 cm from 2011 to 2030, Clarifying SLR behaviors is important to aid local decision- makers in planning structural and non-structural measures to combat escalating flood damage costs in an estuarine delta system; this field is full of future challenges,

关键词： Sea level rise behavior Anthropogenic geomorphologic change Local tidal datum Flood management Adaptation

QLED goes to be both bright and efficient

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Science Bulletin 2019年第7期64卷 464-465页

作者： Haibo zeng School of Materials Science and Engineering Nanjing University of Science and Technology

Quantum dots (QDs) and QD-based light-emitting diodes(QLEDs) have been widely recognized as the key materials and devices for the next generation display due to their flexible and ultra-high definition characteristics, and for color-controllable and healthy solid state lighting [1,2].The external quantum efficiency (EQE), brightness.

关键词： QDs RGB QLED goes to be both bright and efficient