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空间异形钢结构拱桥拱脚局部应力分析

山西建筑 2025年第1期51卷 154-157页

作者：邹颖深圳市市政设计研究院有限公司广东深圳518029

空间异形钢结构拱桥设计计算比较复杂,以锦言大桥为例,对空间异形钢结构拱桥拱脚钢混结合段进行有限元建模分析,采用板单元模拟钢结构,采用实体单元模拟混凝土结构,采用线单元模拟预应力钢束。根据桥梁总体结构模型最不利作用组合计算... 详细信息

空间异形钢结构拱桥设计计算比较复杂,以锦言大桥为例,对空间异形钢结构拱桥拱脚钢混结合段进行有限元建模分析,采用板单元模拟钢结构,采用实体单元模拟混凝土结构,采用线单元模拟预应力钢束。根据桥梁总体结构模型最不利作用组合计算结果获取钢拱肋在拱脚位置结构受力,通过对拱脚相关构件进行分析计算,提出拱脚的设计思路及施工注意事项,为相关桥梁提供一些参考价值。

关键词：空间异形钢结构拱桥拱脚有限元分析预应力钢束

Study on pitting process of 316L stainless steel by means of staircase potential electrochemical impedance spectroscopy

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International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 48-52页

作者： Zhi-jun jia Cui-wei Du Cheng-tao Li zou Yi Xiao-gang Li School of Materials Science and Technology University of science and Technology Beijing Beijing 100083 China

Pitting corrosion of 316L stainless steel in NaCl solution was investigated by means of staircase potential electrochemical impedance spectroscopy（SPEIS）.The investigation focused on the transition of stainless steel from the passive state to pitting *** on the evolution of electrical parameters of the equivalent electrical circuit,it is suggested that the most probable mechanism of pit creation is the film breaking *** result demonstrates that staircase potential electrochemical impedance spectroscopy is an effective method for the investigation of pitting corrosion.

关键词： stainless steel passivation film steel corrosion pitting electrochemical impedance spectroscopy

Neutronics physics analysis of a large fluoride-salt-cooled solidfuel fast reactor with Th-based fuel

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Nuclear Science and Techniques 2017年第11期28卷 188-197页

作者： Yu Peng Gui-Feng Zhu Yang zou Si-jia Liu Hong-Jie Xu Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049China

Fast reactors based on thorium fuel have enhanced inherent safety. Fluoride salt performs well as a coolant in high-temperature nuclear systems. In this paper,we present a reference core for a large fluoride-salt-cooled solid-fuel fast reactor(LSFR) using thorium–uranium fuel cycle. Neutronics physics of the LSFR reference core is investigated with 2D and 3D in-core fuel management strategy. The design parameters analyzed include the fuel volume fraction, power density level and continuous removal of fission products with 3D fuel shuffling that obtains better equilibrium core performance than 2D shuffling. A self-sustained core is achieved for all cases,and the core of 60% fuel volume fraction at 50 MW/m^3 power density is of the best breeding performance(average breeding ratio 1.134). The LSFR core based on thorium fuel is advantageous in its high discharge burn-up of 20–30% fissions per initial heavy metal atom, small reactivity swing over the whole lifetime(to simplify the reactivity control system), the negative reactivity temperature coefficient(intrinsically safe for all cases) and accepted cladding peak radiation damage. The LSFR reactor is a good alternative option for the deployment of a self-sustained thorium-based nuclear system.

关键词： Fluoride salts Thorium cycle Fast reactor Core characteristics Equilibrium

Productivity of coalbed methane wells in southern of Qinshui Basin

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Mining Science and Technology 2010年第5期20卷 765-769,777页

作者： zou Mingjun WEI Chongtao PAN Haiyang SESAY K Santigie CAO jia School of Resources and Geoscience China University of Mining & Technology Xuzhou 221116 China Key Laboratory of CBM Resource and Reservoir-Generating Process Ministry of Education Xuzhou 221008 China

Based on regional CBM geological characteristics and drainage data of three typical Coalbed Methane(CBM) wells in the southern Qinshui Basin,history matching,productivity prediction and factor analysis of gas production control are conducted by using COMET3 reservoir modeling *** results show that in the next 20 years,the cumulative and average daily gas production of the QN01 well are expected to be 800×104 m3 and 1141.1 m3/d,for the QN02 well 878×104 m3 and 1202.7 m3/d and 97.5×104 m3 and 133.55 m3/d for the QN03 *** content and reservoir pressure are the key factors controlling gas production in the area;coal thickness,permeability and porosity are less important;the Langmuir volume,Langmuir pressure and adsorption time have relatively small *** the process of CBM recovery,the material source and driving force are the key features affecting gas productivity,while the permeation process is relatively important and the desorption process has some impact on gas recovery.

关键词： reservoir modeling history matching productivity prediction COMET3

No-tillage effects on grain yield and nitrogen requirements in hybrid rice transplanted with single seedlings: Results of a long-term experiment

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Journal of Integrative Agriculture 2019年第1期18卷 24-32页

作者： HUANG Min CHEN jia-na CAO Fang-bo zou Ying-bin Norman Uphoff Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO) Hunan Agricultural University International Programs-College of Agriculture and Life Sciences (IP-CALS) Cornell University

This study was conducted to determine whether,and if so how,the grain yield and nitrogen(N) requirements of hybrid rice transplanted as single seedlings are affected by no-tillage(NT) practices.A fixed field experiment was done at the Experimental Farm of Hunan Agricultural University in Changsha,Hunan Province,China,from 2004 to *** yield and yield attributes(panicle number per m2,spikelet number per panicle,spikelet filling percentage,grain weight,total biomass,and harvest index) were evaluated as well as the N-use characteristics(total N uptake,internal N-use efficiency,and N requirements) of hybrid rice transplanted as single seedlings comparing NT with conventional tillage(CT).A significant finding was that there were no significant differences in grain yield,yield attributes,and N-use characteristics between CT and *** across the 11 years,grain yield and N requirements were 9.51 t ha^(-1) and 20.2 kg t^(-1) under CT and 9.33 t ha^(-1) and 20.0 kg t^(-1) under NT,*** were significant yearly variations in grain yield,yield attributes,and N-use characteristics observed under both CT and *** yearly variation in grain yield was related to simultaneous changes in spikelet number per panicle,grain weight,total biomass,and harvest ***,it was found that grain yield was positively correlated with internal N-use efficiency but negatively correlated with N *** is concluded that grain yield and N requirements in hybrid rice when transplanted as single seedlings are not affected adversely by *** results of this study suggest that(1) compatible relationships among yield attributes can be established in hybrid rice that is transplanted as single seedlings,and(2) higher grain yield and higher N-use efficiency can be concurrently achieved in hybrid rice transplanted as single seedlings.

关键词： grain yield hybrid rice nitrogen requirements no-tillage transplanting of single seedlings

Two New Eremophilenolides from Cacalia ainsliaeflora

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Chinese Chemical Letters 2003年第5期14卷 479-482页

作者： Man Jun MAO Cheng Shan YUAN Chuan Zong zou Zhong jian jia Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

Two new eremophilenolides (3b-angeloyloxy-8b, 10b-dihydroxy-6b-ethoxyeremophile- nolide (1) and 3b, 6b-diangeloyloxy-8a-methoxy-10a-hydroxyeremophilenolide (2) were isolated from the roots of Cacalia ainsliaeflora. T... 详细信息

关键词： Cacalia ainsliaeflora Compositae eremophiane sesquiterpene.

Maintenance of andromonoecy in an autogamous species:Superior male function in male flowers of the endangered Sagittaria guayanensis

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Plant Diversity 2024年第6期46卷 783-790页

作者： sen-Tao Lyu Ting-Ting zou Qi-Lin jiang Xiao-Fan Wang Laboratory of Plant Systematics and Evolutionary Biology College of Life SciencesWuhan UniversityWuhan 430072China

Andromonoecy is a rare sexual system in *** function of additional male flowers in andromonoecious species has been widely discussed;however,few studies have taken offspring fitness into *** addition,little is known about the mechanisms that maintain andromonoecy in autogamous *** this study,we compared morphology,pollinator preference,pollen production and export,siring ability,natural siring success,hundred seed dry weight,and seed germination rates between male and hermaphroditic flowers in an endangered autogamous andromonoecious species,Sagittaria *** flowers,which are larger than hermaphroditic flowers,required fewer resources to *** visited male flowers more frequently than they visited hermaphroditic *** addition,pollen production and export were higher in male *** pollination demonstrated that siring ability did not differ between flower ***,the natural siring success of male flowers was triple that of hermaphroditic *** seeds sired by male flowers performed better than those sired by hermaphroditic flowers,with greater dry weight and higher germination *** conclusion,male flowers may be superior pollen donors for *** maintenance of andromonoecy in *** may result from the better performance of male flowers in male function compared to that of hermaphroditic flowers.

关键词： Alismataceae Andromonoecy Autogamy Male function Offspring fitness Sagittaria guayanensis

Fruquintinib beneficial in elderly patient with neoplastic pericardial effusion from rectal cancer:A case report

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World Journal of Clinical Cases 2021年第21期9卷 6170-6177页

作者： Ying Zhang jia-Yun zou Yan-Yan Xu Jing-Ni He Department of Clinical Oncology Shengjing Hospital of China Medical UniversityShenyang 110022Liaoning ProvinceChina Department of General Surgery Shengjing Hospital of China Medical UniversityShenyang 110022Liaoning ProvinceChina

BACKGROUND Neoplastic pericardial effusion(NPE)is a rare consequence of rectal cancer and carries a poor *** management has yet to be *** is an oral anti-vascular endothelial growth factor receptor tyrosine kinase inhibitor approved by the China Food and Drug Administration in September 2018 as third-line treatment of metastatic colorectal *** SUMMARY Herein,we report an elderly patient with NPE from rectal cancer who responded to the use of *** March 2015,a 65-year-old Chinese woman diagnosed with KRAS-mutated adenocarcinoma of the rectum was subjected to proctectomy,adjuvant concurrent chemoradiotherapy,and adjuvant *** October 2018,a mediastinal mass was detected via computed *** growth had invaded parietal pericardium and left hilum,displaying features of rectal adenocarcinoma in a bronchial *** and FOLFOX chemotherapeutic regimens were administered as first-and second-line *** two cycles of second-line agents,a sizeable pericardial effusion resulting in tamponade was drained by pericardial *** cytology showed cells consistent with rectal ***-agent fruquintinib was initiated on January 3,2019,as a third-line *** cycles were delivered before the NPE recurred and other lesions *** recurrence-free interval for NPE was 9.2 mo,attesting to the efficacy of ***,the patient entered a palliative care unit for best supportive *** Fruquintinib may confer good survival benefit in elderly patients with NPEs due to rectal cancer.

关键词： Neoplastic pericardial effusion Rectal cancer Fruquintinib Anti-vascular endothelial growth factor receptor tyrosine kinase inhibitor Case report

Generation of pigs with a Belgian Blue mutation in MSTN using CRISPR/Cpf1-assisted ssODN-mediated homologous recombination

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Journal of Integrative Agriculture 2019年第6期18卷 1329-1336页

作者： zou Yun-long LI Zhi-yuan zou Yun-jing HAO Hai-yang HU jia-xiang LI Ning LI Qiu-yan State Key Laboratory of Silkworm Genome Biology Key Laboratory of Sericultural Biology and Genetic BreedingMinistry of Agriculture and Rural AffairsCollege of BiotechnologySouthwest UniversityChongqing 400715P.R.China State Key Laboratory for Agrobiotechnology College of Biological SciencesChina Agricultural UniversityBeijing 100193P.R.China College of Veterinary Medicine China Agricultural UniversityBeijing 100193P.R.China

CRISPR/Cpf1 has emerged recently as an effective tool for genome editing in many organisms,but its use in pigs to generate precise genetic modifications has seldom been ***(MSTN)is a well-characterized negative regulator of muscle development,and natural mutations in this gene cause a double-muscled phenotype in many ***,to the best of our knowledge,no naturally occurring mutation in MSTN has been found in *** addition,no living pig models with sophisticated modifications orthologous to natural mutations in MSTN have yet been *** this study,we exploited the CRISPR/Cpf1 system to introduce a predefined modification orthologous to the natural MSTN mutation found in Belgian Blue cattle(thus known as the Belgian Blue mutation).Our research demonstrated that the cutting efficiency of CRISPR/Cpf1 was 12.3%in mixed porcine fetal fibroblasts in drug free medium,and 41.7%in clonal colonies obtained using G418 ***,the Cpf1-sgRNA vector,ssODN template,and a self-excision cassette were co-transfected into porcine fetal *** G418 selection,8 clonal colonies were examined and 5 with genetic modification were *** these 5,2 harbored the precise 11-bp *** 1 heterozygous clonal colony,2 cloned Duroc piglets were successfully generated,which was heterozygous for the Belgian Blue *** summary,our results demonstrate that CRISPR/Cpf1 system can be used efficiently to generate double-stranded breaks,and also to mediate homologous recombination to introduce precise genomic modifications in pigs.

关键词： MSTN CRISPR/Cpf1 Belgian Blue mutation genetically modified pigs single stranded oligodeoxynucleotide