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Prediction of column failure modes based on artificial neural network

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Earthquake Engineering and Engineering Vibration 2023年第2期22卷 481-493页

作者： Wan Haitao Qi Yongle zhao tiejun Ren Wenjuan Fu Xiaoyan School of Civil Engineering and Architecture Henan UniversityKaifeng 475001China China Energy Engineering Group Guangdong Electric Power Design Institute Co. Ltd.Guangzhou 510663China

To implement the performance-based seismic design of engineered structures,the failure modes of members must be *** classification method of column failure modes is analyzed using data from the Pacific Earthquake Engineering Research Center(PEER).The main factors affecting failure modes of columns include the hoop ratios,longitudinal reinforcement ratios,ratios of transverse reinforcement spacing to section depth,aspect ratios,axial compression ratios,and flexure-shear *** study proposes a data-driven prediction model based on an artificial neural network(ANN)to identify the column failure *** this study,111 groups of data are used,out of which 89 are used as training data and 22 are used as test data,and the ANN prediction model of failure modes is *** results show that the proposed method based on ANN is superior to traditional methods in identifying the column failure modes.

关键词： performance-based seismic design failure mode column artificial neural network prediction model

Recent advances in the catalytic conversion of CO_2 to value added compunds

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Science China Chemistry 2015年第1期58卷 79-92页

作者： Hui Wang Peng Gao tiejun zhao Wei Wei Yuhan Sun Center for Greenhouse Gas and Environmental Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences

CO2 is a major greenhouse gas,and it can also be used as a chemical feedstock for synthesis of chemicals and fuels by passing the petrochemical ***,we present the recent progress of our research work in the catalytic conversion of CO2 to chemicals,with particular attention paid to catalytic reactivity and reaction *** also give the recommendations regarding the challenges and potential directions of the future research in this field.

关键词： CO2 conversion chemicals catalysts hydrogenation reforming

Long-term Behavior of Fiber Reinforced Concrete Exposed to Sulfate Solution Cycling in Drying-immersion

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Journal of Wuhan University of Technology(Materials Science) 2017年第4期32卷 875-881页

作者：耿永娟金祖权 HOU Baorong zhao tiejun GAO Song School of Civil Engineering Qingdao Technological University Qingdao 266033 China Institute of Oceanology The Chinese Academy of Science Qingdao 266071 China

The damage process and corrosion ion distribution in concrete, which was exposed to 60 and 170 drying-immersion cycles of sulfate solution, were systematically investigated. The effects of plain concrete, plain concrete mixed with 4 and 8 kg/m^3 modified PP fiber and high-performance concrete（HPC） mixed with 0.8 kg/m^3 fine PP fiber on the damage process were also studied. The experimental results showed that thenarditeinduced surface scaling, as well as gypsum-and ettringite-induced cracks, were the main degradation forms of concrete under attack of sulfate solution and drying–immersion cycles. The relative dynamic modulus of elasticity of concrete initially increased, then reached stability and finally decreased to failure. The sulfate diffusion coefficients of plain and HPC were 10^（-12） and 10^（-13） m^2/s, respectively. The concentration of sodium ion increased with depth, then maintained stability and finally decreased rapidly with concrete depth. The content of calcium ion on the concrete surface was 110%-150% of that in the interior of specimens. Although fiber worsened the surface scaling of concrete, better resistance capacity of sulfate ion penetration into concrete was observed in plain concrete with 4 kg/m^3 modified PP fiber and HPC.

关键词： fiber reinforced concrete sulfateion damage diffusion coefficient drying-immersion cycles

A Corpus-based Approach to English Subordinate Clause Identification

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High Technology Letters 2001年第1期7卷 10-12页

作者：张晶 zhao tiejun Li Sheng Yao Jianmin Department of Computer Science and Engineering Harbin Institute of Technology

The complex sentence structure of English is a bottleneck to our practical machine translation system. The simplification of English subordinate clauses will greatly relieves the burden of parsing and other grammatical or semantic analysis of a complex sentence, thus improves the output quality of the MT system. But there have not any satisfactory research achievements reported in this field up to now as we know. In this paper, author’s work on a corpus-based approach to English subordinate clause identification is reported. The approach integrates rule-based and statistical methods to get the left and right boundaries of the subordinate clauses. The Penn Treebank corpus is used as the training standard. The precision and recall ratios of subordinate clause identification are tested on both closed and open corpora. A result of 92.9% precision and 91.26% recall is obtained for the closed test and the open test result is 80.34% precision and 83.93% recall. This algorithm has been integrated into our machine translation system. The method can also be applied to processing of any other language.

关键词： Subordinate clauses Corpus Knowledge acquisition

Identification of differential mRNA and lncRNA expression in AcMNPV-infected Sf9 cells

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BIOCELL 2022年第7期46卷 1675-1686页

作者： tiejun zhao RIQIANG DENG MENGQIU CHEN XUNZHANG WANG School of Life Science Sun Yat-sen UniversityGuangzhou510275China

Sf9Sf9 are the ovarian cells of Spodoptera frugiperda that is the host of Autographa californica multiple nucleopolyhedrovirus(AcMNPV),and hence can serve as an effective test vehicle to understand the AcMNPV infection *** this study,through high-throughput sequencing technology using samples collected from Sf9 cells at different time points after AcMNPV infection,3463 pieces of time-series differentially expressed RNA(1,200 mRNA and 2,263 lncRNA)are identified and justified by experimental verification of randomly selected samples from them,proving the validity of the bioinformatical analysis on this *** enrichment analysis and target prediction are performed on those differentially expressed RNA,from which the major functional enrichment distribution of those differentially expressed mRNA is *** has been found that the differential genes are mainly in the cellular anatomical entity and intracellular in terms of the cellular component,and in the binding and catalytic activity in terms of the molecular ***,the differential mRNA are mainly concentrated in global and overview maps,signal transduction,infectious diseases,and viral,***,those mRNA targeted by lncRNA are *** correlation between those differentially expressed lncRNA and mRNA indicates that lncRNA is very likely playing an important role in the interaction between virus and *** by an advanced co-expression analysis approach,the“hub”RNA is also *** study in this work pave the way for further analyzing and understanding how AcMNPV escapes from the host’s immunity,manipulates the host to realize the selfmultiplication,and realizes the timely conversion between its two particle forms,laying the foundation for uncovering the host’s immune response process.

关键词： AcMNPV Sf9 lncRNA mRNA RNA-Seq

Effect of B2O3 on the aqueous tape casting and microwave properties of Li2O-Nb2O5-TiO2 ceramics

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Progress in Natural Science:Materials International 2013年第2期23卷 152-156页

作者： Shaochun Li Qilong Zhang tiejun zhao Hui Yang School of Civil Engineering Qingdao Technological University Department of Materials Science and Engineering Zhejiang University

The effect of B2O3 addition on the aqueous tape casting, sintering, microstructure and microwave dielectric properties of Li2O-Nb2O5-TiO2 ceramics has been investigated. The tape casting slurries exhibit a typical shear-thinning behavior without thixotropy, but the addition of B2O3 increases the viscosity of the slurries significantly. It was found that doping of B2O3 can decrease the tensile strength, strain to failure and density of the green tapes. The sintering temperature could be lowed down to 900℃ with the addition of 2 wt% B2O3 due to the liquid phase effect. No secondary phase is observed. The addition of B2O3 does not induce much degradation on the microwave dielectric properties. Optimum microwave dielectric properties of εr 67, Q×f 6560 GHz are obtained for Li2O-Nb2O5-TiO2 ceramics containing 2 wt% B2O3 sintered at 900 1C. It represents that the ceramics could be promising for multilayer low-temperature co-fired ceramics (LTCC) application.

关键词： Aqueous tape casting B2O3 Rheology Microwave dielectric properties

Influence of Freeze-thaw Cycles on Properties of Integral Water Repellent Concrete

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Journal of Wuhan University of Technology(Materials Science) 2016年第4期31卷 851-856页

作者：马志鸣 WITTMANN Folker H 肖建庄 zhao tiejun Department of Strucutral Engineering Tongji University College of Civil Engineering Qingdao Technological University Aedificat Institute Freiburg

Service life of reinforced concrete structures usually was designed on the basis of one selected deteriorating mechanism as for instance carbonation,chloride penetration,and frost *** could be shown in the meantime by numerous authors,however,that combined actions such as chloride penetration under mechanical load or chloride penetration in combination with freeze-thaw cycles may shorten the service life of reinforced concrete structures more than individual processes acting *** have found that chloride penetration is accelerated significantly by freeze-thaw *** damage not only reduces mechanical strength and elastic modulus but migration of chloride is facilitated in the damaged pore *** penetration can be retarded by the addition of silane emulsion to the fresh *** this way Integral Water Repellent Concrete（IWRC） can be *** of water and ions dissolved in water can not be prevented by integral water repellent treatment but it is slowed *** combination of damage mechanisms and the protective measures by integral water repellent treatment have to be taken into consideration in realistic service life prediction and design.

关键词： penetration silane realistic compressive instance modulus emulsion migration frost deterioration

B-SPLINE-BASED SVM MODEL AND ITS APPLICATIONS TO OIL WATER-FLOODED STATUS IDENTIFICATION

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Journal of Electronics(China) 2007年第2期24卷 245-250页

作者： Shang Fuhua zhao tiejun Yi Xiongying Harbin Institute of Technology Harbin 150001 China Daqing Petroleum Institute Daqing 163318 China

A method of B-spline transform for signal feature extraction is developed. With the B-spline, the log-signal space is mapped into the vector space. An efficient algorithm based on Support Vector Machine (SVM ) to automatically identify the water-flooded status of oil-saturated stratum is described. The experiments show that this algorithm can improve the performances for the identification and the generalization in the case of a limited set of samples.

关键词： Feature extraction B-spline transform Support Vector Machine (SVM) Water-flooded status

Two-stage approach to full Chinese parsing

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High Technology Letters 2005年第4期11卷 359-363页

作者：曹海龙 zhao tiejun Yang Muyun Li Sheng MOE-MS Key Laboratory of Natural Language Processing and Speech Harbin Institute of Technology Harbin 150001 P.R. China

Natural language parsing is a task of great importance and extreme difficulty. In this paper, we present a full Chinese parsing system based on a two-stage approach. Rather than identifying all phrases by a uniform model, we utilize a divide and conquer strategy. We propose an effective and fast method based on Markov model to identify the base phrases. Then we make the first attempt to extend one of the best English parsing models i.e. the head-driven model to recognize Chinese complex phrases. Our two-stage approach is superior to the uniform approach in two aspects. First, it creates synergy between the Markov model and the head-driven model. Second, it reduces the complexity of full Chinese parsing and makes the parsing system space and time efficient. We evaluate our approach in PARSEVAL measures on the open test set, the parsing system performances at 87.53% precision, 87.95% recall.

关键词： natural language processing systems parsing markov model pattern recognition