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Load identification in one dimensional structure based on hybrid finite element method

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Science China(Technological Sciences) 2017年第4期60卷 538-551页

作者： XUE XiaoFeng CHEN XueFeng ZHANG XingWu geng jia State Key Laboratory for Manufacturing System Engineering School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 China

The new hybrid elements are proposed by combing modified Hermitian wavelet elements with ANASYS elements. Then hybrid elements are substituted into finite element formulations to solve the load identification. Transfer matrix can be constructed by using the inverse Newmark algorithm and hybrid finite element method. Loads can obtain through the responses and the transfer matrix. Load identification law was studied under different excitation cases in rod and Timoshenko *** method is adopted to solve ill-posed inverse problem of load identification. Compared with ANSYS results,hybrid elements and HCSWI elements can accurately identify the applied load. Numerical results show that the algorithm of hybrid elements is effective. The accuracy of hybrid elements and HCSWI elements can be verified by comparing the load identification result of ANASYS elements with the experiment data. Hermitian wavelet finite element methods have high accuracy advantage but it is difficult to apply the engineering practice. In practical engineering, complex structure can be analyzed by using the hybrid finite element methods which can be obtained the high accuracy in the crucial component.

关键词： hybrid finite element method Hermitian wavelet elements load identification regularization method

Marginal Land-based Biomass Energy Production in China

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Journal of Integrative Plant Biology 2010年第1期52卷 112-121页

作者： Ya Tang jia-Sui Xie Shu geng Department of Environment College of Architecture and Environment Sichuan University Chengdu 610065 China School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen 518055 China University of California Davis California 95616 USA

Fast economic development in China has resulted in a significant increase in energy demand. Coal accounts for 70% of China＇s primary energy consumption and its combustion has caused many environmental and health problems. Energy security and environmental protection requirements are the main drivers for renewable energy development in China. Small farmland and food security make bioenergy derived from corn or sugarcane unacceptable to China： the focus should be on generating bioenergy from lignocellulosic feedstock sources. As China cannot afford biomass energy production from its croplands, marginal lands may play an important role in biomass energy production. Although on a small scale, marginal land has already been used for various purposes. It is estimated that some 45 million hm2 of marginal land could be brought into high potential biomass energy production. For the success of such an initiative, it will likely be necessary to develop multipurpose plants. A case study, carried out on marginal land in Ningnan County, Sichuan Province with per capita cropland of 0.07 ha, indicated that some 380 000 tons of dry biomass could be produced each year from annual pruning of mulberry trees. This study supports the feasibility of producing large quantities of biomass from marginal land sources.

关键词： no English key word

DT-Net:Joint Dual-Input Transformer and CNN for Retinal Vessel Segmentation

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Computers, Materials & Continua 2023年第9期76卷 3393-3411页

作者： Wenran jia Simin Ma Peng geng Yan Sun School of Information Science and Technology Shijiazhuang Tiedao UniversityShijiazhuangChina School of Mathematics and Information Science Zhangjiakou UniversityZhangjiakouChina

Retinal vessel segmentation in fundus images plays an essential role in the screening,diagnosis,and treatment of many *** acquired fundus images generally have the following problems:uneven illumination,high noise,and complex *** makes vessel segmentation very *** methods of retinal vascular segmentation mainly use convolutional neural networks on U Network(U-Net)models,and they have many limitations and shortcomings,such as the loss of microvascular details at the end of the *** address the limitations of convolution by introducing the transformer into retinal vessel ***,we propose a hybrid method for retinal vessel segmentation based on modulated deformable convolution and the transformer,named ***,multi-scale image features are extracted by deformable convolution and multi-head selfattention(MHSA).Secondly,image information is recovered,and vessel morphology is refined by the proposed transformer decoder ***,the local prediction results are obtained by the side output *** accuracy of the vessel segmentation is improved by the hybrid loss *** results show that our method obtains good segmentation performance on Specificity(SP),Sensitivity(SE),Accuracy(ACC),Curve(AUC),and F1-score on three publicly available fundus datasets such as DRIVE,STARE,and CHASE_DB1.

关键词： Retinal vessel segmentation deformable convolution multi-scale transformer hybrid loss function

Scatter Search Based Particle Swarm Optimization Algorithm for Earliness/Tardiness Flowshop Scheduling with Uncertainty

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International Journal of Automation and computing 2016年第3期13卷 285-295页

作者： jia-Can geng Zhe Cui Xing-Sheng Gu Key Laboratory of Advanced Control and Optimization for Chemical Process Ministry of EducationEast China University of Science and Technology

Considering the imprecise nature of the data in real-world problems, the earliness/tardiness （E/T） fiowshop scheduling problem with uncertain processing time and distinct due windows is concerned in this paper. A fuzzy scheduling model is established and then transformed into a deterministic one by employing the method of maximizing the membership function of middle value. Moreover, an effective scatter search based particle swarm optimization （SSPSO） algorithm is proposed to minimize the sum of total earliness and tardiness penalties. The proposed SSPSO algorithm incorporates the scatter search （SS） algorithm into the frame of particle swarm optimization （PSO） algorithm and gives full play to their characteristics of fast convergence and high diversity. Besides, a differential evolution （DE） scheme is used to generate solutions in the SS. In addition, the dynamic update strategy and critical conditions are adopted to improve the performance of SSPSO. The simulation results indicate the superiority of SSPSO in terms of effectiveness and efficiency.

关键词： Earliness/tardiness (E/T) scheduling fuzzy modeling scatter search (SS) particle swarm optimization (PSO).

Dual precipitate simultaneous enhancement of tensile and fatigue strength in(FeCoNi)_(86)Al_(7)Ti_(7) high-entropy alloy fabricated using selective laser melting

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Journal of Materials Science & Technology 2023年第17期148卷 90-104页

作者： Long Xu Yandong jia Zhenhui Wang Shiwei Wu Yuefei jia Chuan geng jianchao Peng Xiaohua Tan Gang Wang Institute of Materials Shanghai UniversityShanghai 200444China Zhejiang Institute of Advanced Materials Shanghai UniversityJiashan 314100China Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore 117575Singapore Laboratory for Microstructures Shanghai UniversityShanghai 200444China

Recent studies have indicated that precipitation-strengthened high-entropy alloys(HEAs)show superior mechanical performance and have been successfully fabricated by additive ***,the lack of fatigue and fracture research has limited the engineering applications of additive manufacturing *** work explored a dual precipitation-strengthened(FeCoNi)_(86)Al_(7)Ti_(7) HEA with excellent tensile and fatigue strength,prepared through selective laser melting and heat *** with the as-built samples,the tensile properties and fatigue endurance limit improved through aging by 48.7%and 30%,*** strengthening mechanism and enhanced fatigue performance were clarified in *** improvement in fatigue strength was attributed to the improved resistance of the L1_(2) and L2_(1) *** deformation,the dislocation shear coherent L1_(2) precipitates reduced slip band energy and inhibited slip band expansion,while the L2_(1) particles acted as obstructions for further slip band propagation,severely limiting the rapid formation and propagation of crack ***-situ TEM cyclic tensile-tensile testing also clarified the fatigue crack growth behavior,demonstrating that crack deflection due to L2_(1) precipitate obstruction slowed down the crack growth rate and efficiently promoted the closure of the microcrack *** work offers im plications for a new strategy to develop additive manufacturing HEAs.

关键词： High-entropy alloy Selective laser melting Precipitation strengthening Fatigue Crack deflection

A dual enzyme-phosphate hybrid nanoflower for glutamate detection

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Particuology 2023年第12期83卷 63-70页

作者： Peikun Li jiahui jia Zixin geng Saizhao Pang Ruirui Wang Muhammad Bilal Hongjie Bian jiandong Cui Shiru jia State Key Laboratory of Food Nutrition and Safety Laboratory of Industrial Fermentation MicrobiologyMinistry of EducationTianjin University of Science and TechnologyTianjin300457China Research Center for Fermentation Engineering of Hebei College of Bioscience and BioengineeringHebei University of Science and TechnologyShijiazhang050000China Institute of Chemical Technology and Engineering Faculty of Chemical TechnologyPoznan University of TechnologyBerdychowo 4PL-60695PoznanPoland

The enzyme hybrid nanoflower has gained interests in biosensors due to their simple synthesis and high *** this study,glutamate oxidase(GLOX)and horseradish peroxidase(HRP)hybrid nanoflowers(GLOX&HRP-HNFs)were successfully prepared for the detection of glutamic acid(Glu).The effects of the synthesis conditions on the activity of GLOX&HRP-HNFs were *** revealed that the maximum activity of GLOX&HRP-HNFs was under 4 mM phosphate radical,2.5 mM MnSO4,0.04 mg/mL GLOX,and 0.16 mg/mL *** immobilization,no significant differences were observed in optimum pH and temperature values of the GLOX and *** GLOX&HRP-HNFs exhibited higher storage stability and resistance to organic solvents than free GLOX and ***,the GLOX&HRP-HNFs maintained 69%of its primary activity after 6 *** important,the GLOX&HRP-HNFs exhibited a good linear range from 1 to 100μM(R^(2)=0.9979)and a low limit of detection(LOD)of 0.59μM for *** results suggest that the GLOX&HRP-HNFs is a promising candidate for applications in biosensing for the detection of glutamate.

关键词： Glutamate oxidase Horseradish peroxidase Nanoflowers Glutamate detection

Clinical value of serum pepsinogen in the diagnosis and treatment of gastric diseases

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World Journal of Gastrointestinal Oncology 2023年第7期15卷 1174-1181页

作者： Yuan Qin jia-Xin geng Biao Huang College of Life Sciences and Medicine Zhejiang Sci-Tech UniversityHangzhou 310018Zhejiang ProvinceChina

Pepsinogen,secreted from the gastric mucosa,is the precursor of *** is categorized as pepsinogen 1 and pepsinogen 2 based on its *** pepsinogen content that can enter the blood circulation through the capillaries of the gastric mucosa is approximately 1%and remains stable all the *** pepsinogen content in serum will change with the pathological changes of gastric ***,the level of pepsinogen in serum can play a role in serologic biopsy to reflect the function and morphology of different regions of gastric mucosa and serve as an indicator of gastric *** study conducts relevant research on serum pepsinogen 1,pepsinogen 2,and the ratio of pepsinogen 1 to pepsinogen 2,and reviews their important value in clinical diagnosis of Helicobacter pylori infection,gastric ulcer,and even gastric carcinoma,providing ideas for other researchers.

关键词： Pepsinogen 1 Pepsinogen 2 Gastric diseases Serological marker Serological biopsy

Glutamate oxidase-integrated biomimetic Fe_(3)O_(4) hybrids as cascade nanozymes for glutamate detection

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Particuology 2024年第5期88卷 192-200页

作者： Peikun Li Yanchao Wang Xiuyan Luo Zixin geng jiahui jia Ruirui Wang jiandong Cui Hongjie Bian Shiru jia State Key Laboratory of Food Nutrition and Safety Laboratory of Industrial Fermentation MicrobiologyMinistry of EducationTianjin University of Science and TechnologyTianjin300457China Sports Department Hebei University of Science and TechnologyShijiazhang050000China Research Center for Fermentation Engineering of Hebei College of Bioscience and BioengineeringHebei University of Science and TechnologyShijiazhang050000China

Herein,a new nanozyme/natural enzyme hybrid biosensor was established for ultrasensitive l-glutamic acid(L-Glu)*** Fe_(3)O_(4) nanoparticles with peroxidase-like activity and stability was used as a nanozyme and carrier for immobilizing l-Glutamate oxidase(GLOD)through Schiffff base reaction to construct a chem-enzyme cascade *** resultant Fe_(3)O_(4)-GOLD exhibited a wide linear range(10−500μM)and a low detection limit of 6.03μM for L-Glu ***,the Fe_(3)O_(4)-GOLD exhibited excellent pH stability,thermal stability,reusability and storage *** repeated nine cycles,Fe_(3)O_(4)-GOLD still retained 70%of its initial ***,Fe_(3)O_(4)-GOLD maintained 50%of its initial activity after storage for 20 days,while free GLOD only retained 20%of its initial *** strategy of integrating biomimetic Fe 3 O4 and natural enzymes for cascade catalysis makes it possible to design an efficient and stable chemo-enzyme composite catalysts,which are promising for applications in biosensing and biomimetic catalysis.

关键词： Fe_(3)O_(4) nanozyme GLOD Chemo-enzymes Glutamate detection

Development of a hydrogen peroxide-responsive and oxygen-carrying nanoemulsion for photodynamic therapy against hypoxic tumors using phase inversion composition method

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Journal of Innovative Optical Health Sciences 2021年第2期4卷 75-83页

作者： Liang Hong jia Zhang Junxian geng Junle Qu Liwei Liu Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University Shenzhen 518060P.R.China

Photodynamic therapy(PDT)has become an attractive tumor treatment modality because of its noninvasive feature and low side ***,extreme hypoxia inside solid tumors severely impedes PDT therapeutic *** overcome this obstacle,various strategies have been developed *** them,in situ oxygen generation,which relies on the decom-position of tumor endogenous H_(2)O_(2),and oxygen delivery tactic using high oxygen loading capacity of hemoglobin or perfluorocarbons,have been widely *** in situ oxygen generation strategy has high specificity to tumors,but its oxygen-generating efficiency is lim-ited by the intrinsically low tumor H_(2)O_(2)*** contrast,the oxygen delivery approach holds advantage of high oxygen loading efficiency,nevertheless lacks tumor *** this work,we prepared a nanoemulsion system containing H_(2)O_(2)-responsive catalase,highly efficient ox-ygen carrier perfiuoropolyether(PFPE),and a near-infrared(NIR)light activatable photo-sensitizer IR780,to combine the high tumor specificity of the in situ oxygen generation strategy and the high efficiency of the oxygen delivery *** concisely prepared nanoplatform exhibited enhanced and H_(2)O_(2)-controllable production of singlet oxygen under light excitation,satisfactory cytocompatibility,and ability to kill cancer cells under NIR light *** highlights the potential of this novel nanoplatform for highly efficient and selective NIR light mediated PDT against hypoxic *** research provides new insight into the design of intelligent nanoplatform for relieving tumor hypoxia and enhancing the oxygen-dependent PDT effects in hypoxic tumors.

关键词： Hypoxia catalase oxygen delivery perfluorocarbon near-infrared