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Investigation on the interface of Cu/Al couples during isothermal heating

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 309-318页

作者： Yan-qiu Han Li-hua Ben jin-jin yao Shu-wei Feng Chun-jing Wu School of Materials Science and Engineering University of Science and Technology Beijing

The evolutionary process and intermetallic compounds of Cu/A1 couples during isothermal heating at a constant bonding tem- perature of 550℃ were investigated in this paper. The interracial morphologies and microstructures were examined by optical microscopy, scanning electron microscopy equipped with energy dispersive X-ray spectroscopy, and X-ray diffraction. The results suggest that bonding is not achieved between Cu and A1 at 550℃ in 10 min due to undamaged oxide films. Upon increasing the bonding time from 15 to 25 min, however, metallurgical bonding is obtained in these samples, and the thickness of the reactive zone varies with holding time. In the interfacial region, the final microstructure consists of Cu9A14, CuAl, CuA12, and ct-A1 ＋ CuAl2. Furthermore, these results provide new insights into the mechanism of the imerfacial reaction between Cu and A1. Microhardness measurements show that the chemical composition exerts a signifi- cant influence on the mechanical properties of Cu/A1 couples.

关键词： copper aluminum intermetallic compounds oxide films isothermal heating

Multi-source information fused generative adversarial network model and data assimilation based history matching for reservoir with complex geologies

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Petroleum Science 2022年第2期19卷 707-719页

作者： Kai Zhang Hai-Qun Yu Xiao-Peng Ma jin-Ding Zhang Jian Wang Chuan-jin yao Yong-Fei Yang Hai Sun Jun yao Jian Wang School of Petroleum Engineering China University of Petroleum(East China)QingdaoShandong266580China School of Science China University of Petroleum(East China)QingdaoShandong266580China Shengli Oil Field Exploration and Development Research Institute DongyingShandong266071China

For reservoirs with complex non-Gaussian geological characteristics,such as carbonate reservoirs or reservoirs with sedimentary facies distribution,it is difficult to implement history matching directly,especially for the ensemble-based data assimilation *** this paper,we propose a multi-source information fused generative adversarial network(MSIGAN)model,which is used for parameterization of the complex *** MSIGAN,various information such as facies distribution,microseismic,and inter-well connectivity,can be integrated to learn the geological *** two major generative models in deep learning,variational autoencoder(VAE)and generative adversarial network(GAN)are combined in our *** the proposed MSIGAN model is integrated into the ensemble smoother with multiple data assimilation(ESMDA)method to conduct history *** tested the proposed method on two reservoir models with fluvial *** experimental results show that the proposed MSIGAN model can effectively learn the complex geological features,which can promote the accuracy of history matching.

关键词： Multi-source information Automatic history matching Deep learning Data assimilation Generative model

Contra-lateral liver lobe hypertrophy after unilobar Y90 radioembolization:An alternative to portal vein embolization?

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World Journal of Gastroenterology 2015年第11期21卷 3170-3173页

作者： jin-yao Teo Brian KP Goh Department of Hepatopancrea- tobiliary and Transplantation Surgery Singapore General Hospital Duke-NUS Graduate Medical School

Liver resection(LR) with negative margins confers survival advantage in many patients with hepatic ***,an adequate future liver remnant(FLR) is imperative for safe ***,in patients with an inadequate FLR; the 2 most established clinical techniques performed to induce liver hypertrophy are portal vein embolization(PVE) and portal vein *** recently,it has been observed that patients who undergo treatment via Y90 radioembolization experience hypertrophy of the contra-lateral untreated liver *** on these observations,several investigators have proposed the potential use of this modality as an alternative technique for increasing the FLR prior to liver resection.Y90 radioembolization induces hypertrophy at a slower rate than PVE but has the added advantage of concomitant local disease control and tumour downstaging.

关键词： Liver hypertrophy Y90 Radioembolization Portal vei

CFD Based Study of Heterogeneous Microclimate in a Typical Chinese Greenhouse in Central China

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Journal of Integrative Agriculture 2013年第5期12卷 914-923页

作者： WANG Xiao-wei LUO jin-yao LI Xiao-ping State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

Indoor microclimate is important for crop production and quality in greenhouse cultivation. This paper focuses on microclimate study based on a computational fluid dynamics （CFD） model of a typical plastic greenhouse （with a sector shape vertical cross-section） popularly used in central China. A radiation model is added into the CFD model so as to simulate coupling of convective transfers and radiative exchanges at the cover and the roof, instead of using the usual coupling approach based on energy balance. In addition, a fractal permeability model is innovatively adopted in the modeling of the crop canopy. Compared the numerical results with measured experimental data, the model simulation is proved with success. This model then is used to explore the microclimate variable distributions in the greenhouse. It shows that the airflow pattern, temperature and humidity profiles are different from those in a sawtooth Mediterranean- type greenhouse. The study suggests that this deliberately developed CFD model can be served as a useful tool in macroclimate research and greenhouse design investigating.

关键词： plastic greenhouse CFD simulation microclimate fi'actal coupled model

Evaluation of Scheme Design of Blast Furnace Based on Artificial Neural Network

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Journal of Iron and Steel Research International 2008年第3期15卷 1-4,36页

作者： TANG Hong LI jing-min yao Bi-qiang LIAO Hong-fu yao jin School of Manufacturing Science and Engineering Sichuan University Chengdu 610065 Sichuan China School of Mechanical and Electrical Engineering Panzhihua Univer＇sity Panzhihua 617000 Sichuan China

Blast furnace scheme design is very important, since it directly affects the performance, cost and configuration of the blast furnace. An evaluation approach to furnace scheme design was brought forward based on artificial neural network. Ten independent parameters which determined a scheme design were proposed. The improved threelayer BP network algorithm was used to build the evaluation model in which the 10 independent parameters were taken as input evaluation indexes and the degree to which the scheme design satisfies the requirements of the blast furnace as output. It was trained by the existing samples of the scheme design and the experts＇ experience, and then tested by the other samples so as to develop the evaluation model. As an example, it is found that a good scheme design of blast furnace can be chosen by using the evaluation model proposed.

关键词： blast furnace artificial neural network scheme design

Investigation of the flotation behavior and interaction characteristics of micro-fine quartz and magnesite in a dodecylamine system under ultrasonic treatment

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Particuology 2024年第11期94卷 386-399页

作者： Xiufeng Gong jin yao Wanzhong Yin Jianwei Yu Bin Yang Yulian Wang School of Resources and Civil Engineering Northeastern UniversityShenyang110819China State Key Laboratory of Mineral Processing Beijing102628China Key Laboratory of Solid Waste Treatment and Resource Utilization of the Ministry of Education Southwest University of Science and TechnologyMianyang621010China School of Chemical Engineering China University of Mining and TechnologyXuzhou221116JiangsuChina School of Materials Science and Engineering Shenyang Ligong UniversityShenyang110159China

Ultrasonic treatment,as an important surface modification method,profoundly affects the flotation behavior of *** study examined the impact of ultrasonic treatment on the surface properties and flotation performance of magnesite and quartz in a dodecylamine(DDA)flotation *** force microscope detection results revealed that the surface roughness and roughness size of both magnesite and quartz increased after ultrasonic *** tests indicated that the recovery rates of magnesite and quartz were lower after ultrasonic *** pH of 10 and DDA of 75 mg/L,ultrasonic treatment led to a 0.66%,3.46%,and 0.33%decrease in the flotation recovery rates for three different magnesite particle *** ultrasonic processing,the flotation recovery rates for three different quartz particle sizes decreased by 8.48%,30.76%,and 43.69%,in that order.X-ray photoelectron spectroscopy detection results showed an increased presence of characteristic Mg and Si sites on the surfaces of magnesite and quartz following ultrasonic *** acted on the surfaces of the two minerals through electrostatic adsorption and hydrogen bonding adsorption and repelled the flotation of minerals owing to the same charge as characteristic sites,thereby reducing flotation *** capacity tests and contact angle measurements demonstrated a decrease in DDA adsorption and contact angle on the surfaces of magnesite and quartz after ultrasonic treatment,explaining the reduced *** Derjaguin–Landau–Verwey–Overbeek theoretical calculations indicated that before ultrasonic treatment,there was a repulsive energy between magnesite and fine-grained quartz *** ultrasonic treatment,the interaction energy between magnesite and fine quartz particles is mutual attraction.

关键词： Ultrasonic treatment Magnesite Fine-grained quartz Surface properties Interaction energy

Analysis of drivers’characteristic driving operations based on combined features

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Journal of Intelligent and Connected Vehicles 2018年第3期1卷 114-119页

作者： Min Wang Shuguang Li Lei Zhu jin yao School of Manufacturing Science and Engineering Sichuan UniversityChengduChina

Purpose–Analysis of characteristic driving operations can help develop supports for drivers with different driving ***,the existing knowledge on analysis of driving skills only focuses on single driving operation and cannot reflect the differences on proficiency of coordination of driving ***,the purpose of this paper is to analyze driving skills from driving coordinating *** are two main contributions:the first involves a method for feature extraction based on AdaBoost,which selects features critical for coordinating operations of experienced drivers and inexperienced drivers,and the second involves a generating method for candidate features,called the combined features method,through which two or more different driving operations at the same location are combined into a candidate combined feature.A series of experiments based on driving simulator and specific course with several different curves were carried out,and the result indicated the feasibility of analyzing driving behavior through AdaBoost and the combined features ***/methodology/approach–AdaBoost was used to extract features and the combined features method was used to combine two or more different driving operations at the same ***–A series of experiments based on driving simulator and specific course with several different curves were carried out,and the result indicated the feasibility of analyzing driving behavior through AdaBoost and the combined features ***/value–There are two main contributions:the first involves a method for feature extraction based on AdaBoost,which selects features critical for coordinating operations of experienced drivers and inexperienced drivers,and the second involves a generating method for candidate features,called the combined features method,through which two or more different driving operations at the same location are combined into a candidate combined feature.

关键词： Machine learning Advanced driver assistant systems Driver behaviors and assistance

Photovoltaic Performance and Charge Recombination Dynamics of P3HT/PCBM Blend Heterojunction

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Chemical Research in Chinese Universities 2013年第6期29卷 1185-1188页

作者： yao jin-bo WANG Ying-hui ZHANG Han-zhuang Training Department Air Force Aviation University Changchun 130022 P.R.China College of Physics Jilin University Changchun 130012 P.R.China

We prepared the polymer solar cell based on poly（3-hexylthiophene）（P3HT）/fullerene derivative PCBM（PCBM=[6,6]-phenyl-C61-butyric acid methyl ester） heterojunction and investigated the irradiation intensi- ty-dependent charge recombination dynamics of heterojunction employing nanosecond transient absorption spectroscopy with bias light so as to simulate the photophysical process in heterojunction when the photovoltaic device is on operation. The experimental data exhibit that the yield of free charges gradually decreases and the loss of mobile carriers originated from bimolecular recombination simultaneously increases as the irradiation intensity gradually enhances. This indicates that the polymer solar cell is much suitably used at a low irradiation intensity.

关键词： Polymer solar cell Charge recombination Transient absorption

Parametric Dimensional Analysis on the Structural Response of An Innovative Subsurface Tension Leg Platform in Ultra-Deep Water

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China Ocean Engineering 2018年第4期32卷 482-489页

作者： ZHEN Xing-wei WU Jia-hao HUANG Yi HAN Yue yao jin-jiang School of Naval Architecture and Ocean Engineering Faculty of Vehicle Engineering and Mechanics Dalian University of Technology

The innovative Subsurface Tension Leg Platform(STLP), which is designed to be located below Mean Water Level(M.W.L) to minimize direct wave loading and mitigate the effect of strong surface currents, is considered as a competitive alternative system to support shallow-water rated well completion equipment and rigid risers for large ultra-deep water oil field development. A detailed description of the design philosophy of STLP has been published in the series of papers and patents. Nonetheless, design uncertainties arise as limited understanding of various parameters effects on the structural response of STLP, pertaining to the environmental loading, structural properties and hydrodynamic characteristics. This paper focuses on providing quantitative methodology on how each parameter affects the structural response of STLP, which will facilitate establishing the unique design criteria as regards to STLP. Firstly, the entire list of dimensionless groups of input and output parameters is proposed based on VaschyBuckingham theory. Then, numerical models are built and a series of numerical tests are carried out for validating the obtained dimensionless groups. On this basis, the calculation results of a great quantity of parametric studies on the structural response of STLP are presented and discussed in detail. Further, empirical formulae for predicting STLP response are derived through nonlinear regression analysis. Finally, conclusions and discussions are made. It has been demonstrated that the study provides a methodology for better control of key parameters and lays the foundation for optimal design of STLP. The obtained conclusions also have wide ranging applicability in reference to the engineering design and design analysis aspects of deepwater buoy supporting installations, such as Grouped SLOR or TLR system.

关键词： subsurface tension leg platform structural response dimensional analysis ultra-deep water