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NEW MULTIOBJECTIVE SIMULATED ANNEALING ALGORITHM AND ITS APPLICATION TO TURBINE CASCADES’ DESIGN

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Chinese Journal of Mechanical Engineering 1999年第1期12卷 51-56页

作者： tong tong feng Zhenping Xi’an Jiaotong University Xi'an Jiaotong Univ Xi'an China

A new kind of multiobjective simulated annealing algorithm is proposed,in which the concept of non dominated character is introduced and a new multiobjective acceptance criterion is set *** optimization example of a typical mathematical problem with two minimum objective functions indicates that all of the solutions contract to the set of the non dominated points,and the variation trend of the optimal solutions is verified to be identical with that obtained using Genetic Algor *** new developed algorithm is then applied to the multiobjective optimization design of turbine cascades,in which it is coupled with the aerodynamics computation of the cascade flow fields and performance and the calculated loss coefficient and work potential of the cascade are considered as the objective functions,thus setting up a technique to the engineering optimization design for the *** optimization results,by the view of a group of optimal solutions,show that the algorithm is superior to the traditional technique of multiobjective optimization design and can be applied to more than two objective optimization cascade design problem or other engineering multiobjective optimization designs.

关键词： Simulated annealing algorithm Multiobjective Optimization design Turbine cascade

Dataset of human motion status using IR-UWB through-wall radar

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Journal of Systems Engineering and Electronics 2021年第5期32卷 1083-1096页

作者： ZHU Zhengliang YANG Degui ZHANG Junchao tong feng Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education Xia-men UniversityXiamen 361005China School of Aeronautics and Astronautics Central South UniversityChangsha 410083China College of Ocean and Earth Sciences Xiamen UniversityXiamen 361005China

Ultra-wideband(UWB)through-wall radar has a wide range of applications in non-contact human information detection and *** the integration of machine learning technology,its potential prospects include the physiological monitoring of patients in the hospital environment and the daily monitoring at *** many target detection methods of UWB through-wall radar based on machine learning have been proposed,there is a lack of an opensource dataset to evaluate the performance of the *** published dataset is measured by impulse radio UWB(IR-UWB)through-wall radar *** test subjects are measured in different environments and several defined motion *** the presented dataset,we propose a human-motion-status recognition method using a convolutional neural network(CNN),and the detailed dataset partition method and the recognition process flow are *** the well-trained network,the recognition accuracy of testing data for three kinds of motion status is higher than 99.7%.The dataset presented in this paper considers a simple ***,we call on all organizations in the UWB radar field to cooperate to build opensource datasets to further promote the development of UWB through-wall radar.

关键词： impulse radio ultra-wideband(IR-UWB) through-wall radar human motion status dataset convolutional neural network(CNN)

Tumor Classification of Gene Expression Data by Fuzzy Hybrid Twin SVM

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Chinese Journal of Electronics 2022年第1期31卷 99-106页

作者： DUAN Hua feng tong LIU Songning ZHANG Yulin SU Jionglong College of Mathematics and Systems Science Shandong University of Science and Technology School of AI and Advanced Computing XJTLU Entrepreneur College (Taicang) Xi'an Jiaotong-Liverpool University

A new classification model, the fuzzy hybrid twin support vector machine(TWSVM), namely FHTWSVM, is proposed by combining the fuzzy TWSVM and the hypersphere support vector machine(SVM).The hypersphere SVM is utilized for generating the hyperspheres for the positive and negative class with the smallest possible radius, so that the hyperspheres can contain as many samples as possible. The samples which the hyperspheres cover form a new sample set. Furthermore a distance-based fuzzy function is utilized to calculate the fuzzy factors for the samples. Finally FHTWSVM is used to train all samples with the parameters optimized by grid search. This method can maximize intra-class clustering for noise removal and reduce the influence of *** demonstrate the superiority of the performance of FHTWSVM over other classifiers, e.g., KNN, RF,Bayesian, TWSVM, Ada Boost and XGBoost, a series of experiments is conducted using eight gene expression datasets. The evaluation results show that the proposed approach can improve the classification performance as well as reduce prediction errors for the datasets.

关键词： biology computing support vector machines grid search fuzzy TWSVM hypersphere support vector machine hypersphere SVM intra-class clustering pattern classification fuzzy hybrid twin SVM FHTWSVM tumor classification tumours fuzzy hybrid twin support vector machine learning (artificial intelligence) distance-based fuzzy function fuzzy set theory pattern clustering search problems gene expression data

Development of a new irradiation-embrittlement prediction model for reactor pressure-vessel steels

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Nuclear Science and Techniques 2024年第11期35卷 182-192页

作者： Qi-Bao Chu Lu Sun Zhen-feng tong Qing Wang Ministry of Ecology and Environment Nuclear and Radiation Safety CenterBeijing 100082China School of Nuclear Science and Engineering North China Electric Power UniversityBeijing 102206China

Predicting the transition-temperature shift(TTS)induced by neutron irradiation in reactor pressure-vessel(RPV)steels is important for the evaluation and extension of nuclear power-plant *** prediction models may fail to properly describe the embrittlement trend curves of Chinese domestic RPV steels with relatively low Cu *** on the screened surveillance data of Chinese domestic and similar international RPV steels,we have developed a new fluencedependent model for predicting the irradiation-embrittlement *** fast neutron fluence(E>1 MeV)exhibited the highest correlation coefficient with the measured TTS data;thus,it is a crucial parameter in the prediction *** chemical composition has little relevance to the TTS residual calculated by the fluence-dependent *** results show that the newly developed model with a simple power-law functional form of the neutron fluence is suitable for predicting the irradiation-embrittlement trend of Chinese domestic RPVs,regardless of the effect of the chemical composition.

关键词： Reactor pressure vessel steel Transition temperature shift Irradiation embrittlement Embrittlement trend curve Prediction model

Analysis of Metal Forming in Two-Roll Cross Wedge Rolling Process Using Finite Element Method

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Journal of Iron and Steel Research International 2009年第1期16卷 38-43页

作者： WANG Min-ting LI Xue-tong DU feng-shan College of Mechanical and Engineering Yanshan University Qinhuangdao 066004 Hebei China

A simulation model for two-roll cross wedge rolling （CWR） was presented by using three-dimensional rigid-plastic finite element method （FEM）. The whole forming process of CWR, including knifing zone, guiding zone, stretching zone, and sizing zone, was simulated using the model in which dynamic adaptive remeshing technology for tetrahedral solid elements was used to fix element distortion. Based on the simulation results, the distributions of metal flow field, strain field, and damage field, and the geometry of the workpiece＇s end were analyzed. These results could provide theoretical guidance for realizing net shaping and reasonable design of tools.

关键词： cross wedge rolling finite element method plastic forming simulation

A novel and efficient strategy involving a CuI catalyzed cascade reaction to synthesize acenaphtho[1,2-b]quinoline derivatives

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Chinese Chemical Letters 2016年第3期27卷 349-352页

作者： Hong-Kun Yang Yuan-feng tong Song Wu State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences & Peking Union Medical College

A novel and efficient approach for the straightforward synthesis of biologically significant acenaphtho[1,2-b]quinoline derivatives in good yields utilizing CuI as a catalyst with a broad array of substrates has been developed. The strategy features as a CuI-catalyzed cascade reaction involving the formation of two new C–C bonds and one new C–N bond with high atom economy. A proposed mechanism for the reaction is described.

关键词： Cascade reaction CuI Substituted anilines Phenylethynyl-1-naphthaldehydes Acenaphtho[1 2-b]quinolones

Head and Tail Shape Control in Vertical-Horizontal Rolling Process by FEM

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Journal of Iron and Steel Research International 2009年第5期16卷 35-42页

作者： ZANG Xin-liang LI Xue-tong DU feng-shan Department of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China

Using 3D rigid-plastic finite element method （FEM）, a numerical simulation model for nonsteady state vertical-horizontal rolling process in roughing trains was built and was validated by comparing the simulated values with experimental ones of width and shape of the stock ends. According to certain 2050 roughing processing technologies, the short shape control （SSC） of the stock ends was investigated using the model. Based on the simulated results, a new SSC model was developed. The analyzed results showed that the new SSC model is effective in improving the shape of the stock ends.

关键词： hot rolling FEM simulation edging shape control

Genome-wide detection for runs of homozygosity analysis in three pig breeds from Chinese Taihu Basin and Landrace pigs by SLAF-seq data

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Journal of Integrative Agriculture 2022年第11期21卷 3293-3301页

作者： tong Shi-feng ZHU Mo XIE Rui LI Dong-feng ZHANG Li-fan LIU Yang Department of Animal Genetics Breeding and ReproductionCollege of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095P.R.China Key Laboratory of Urban Agriculture Ministry of Agriculture and Rural AffairsShanghai 200240P.R.China

Erhualian(E),Meishan(MS)and Mi(MI)pigs are excellent indigenous pig breeds in Chinese Taihu Basin,which have made great contributions to the genetic improvement of commercial *** of the genetic structure and inbreeding level of the 3 pig breeds is of great significance for the sustainable breeding of commercial *** length and number of runs of homozygosity(ROH)as well as the frequency of genomes covered by ROH can be used as indicators to evaluate the level of inbreeding and the origin of the *** this study,the ROH characteristics of E,MS,MI and Landrace(L)pigs were analyzed by SLAF-seq data,and the inbreeding coefficient based on ROH(F_(ROH))was *** addition,we have identified candidate genes in the genomic regions associated with ROH.A total of10568 ROH were detected in 116 individuals of 4 pig *** analysis showed that there were significant differences in genetic structure between 3 Taihu Basin pig breeds and L,and the genetic structure of E and MI was *** results of F_(ROH)showed that the inbreeding level of MS was the highest(0.25±0.07),while E and MI were lower than *** with the other 3 pig populations,MS showed a higher frequency of long ROH(>5 Mb),indicating higher inbreeding in MS in recent generations.A large number of candidate genes related to reproductive traits are located in the genomic regions with a high frequency of ROH,and these genes are expected to be used as candidate genes in marker-assisted selection(MAS)breeding *** findings can provide theoretical support for genetic conservation and genetic improvement of 3 pig breeds in Chinese Taihu Basin.

关键词： runs of homozygosity inbreeding coefficient pig candidate gene

Evaluating acoustic communication performance of micro autonomous underwater vehicles in confined spaces

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Frontiers of Information Technology & Electronic Engineering 2018年第8期19卷 1013-1023页

作者： Qiu-yang TAO Yue-hai ZHOU feng tong Ai-jun SONG Fumin ZHANG School of Electrical and Computer Engineering Georgia Institute of Technology College of Ocean and Earth Sciences Xiamen University Department of Electrical and Computer Engineering The University of Alabama

Micro-sized autonomous underwater vehicles(μAUVs) are well suited to various applications in confined underwater spaces. Acoustic communication is required for many application scenarios of μAUVs to enable data transmission without surfacing. This paper presents the integration of a compact acoustic communication device with a μAUV prototype. Packet reception rate(PRR) and bit error rate(BER) of the acoustic communication link are evaluated in a confined pool environment through experiments while the μAUV is either stationary or *** pinpoint several major factors that impact the communication performance. Experimental results show that the multi-path effect significantly affects the synchronization signals of the communication device. The relative motion between the vehicle and the base station also degrades the communication performance. These results suggest future methods towards improvements.

关键词： Autonomous underwater vehicles Underwater acoustic communications Confined water space