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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1007-1018页

作者： Huanzhi Zhang Tianxin Li Qianqian Wang Zhenbo Zhu hefei Huang Yiping Lu Engineering Research Center of High Entropy Alloy Materials(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai201800China

Interstitial strengthening with nitrogen(N)is one of the effective ways to improve the mechanical properties of HEAs,but the effects of N on the microstructures and mechanical properties of the irradiated HEAs have not been studied ***,the microstructures and mechanical properties of N-free and N-doped Ti_(2)ZrNbV_(0.5)Mo_(0.2)HEAs before and after He irradiation were *** results showed that the solid solution strengthening caused by interstitial N improved the yield strength at room temperature and 1023 K without significantly reducing plasticity.N doping significantly promoted the growth,aggregation and wider spatial distribution of He bubbles by enhancing the mobility of He atoms/He-vacancy complexes,with the average size of He bubbles increasing from 10.4 nm in N-free HEA to 31.0 nm in N-doped *** addition,N-doped HEA showed a much higher irradiation hardness increment and hardening fraction than N-free *** to conventional materials doped with N,the introduction of N into Ti_(2)ZrNbV_(0.5)Mo_(0.2)HEA had adverse effects on its resistance to He bubble growth and irradiation *** results of this study indicated that N doping may not improve the irradiation resistance of HEAs.

关键词： High-entropy alloys Nitrogen doping Mechanical properties Helium bubbles Irradiation resistance

Tectonodynamic Adjustment of Crustal Materials in the Middle-Lower Reaches of the Yangtze River

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Acta Geologica Sinica(English Edition) 1989年第4期63卷 325-342,447页

作者： Dong Shuwen anhui Institute of Geology, hefei, anhui Liu Linqun anhui Institute of Geology Hefei Anhui

Under the tectonodynamic process, crustal materials tend to experience two modes of adjustment: (1) structural (physical) adjustment, manifested by folding, faulting, uplifting, downwarping, etc.: (2) compositional adjustment, represented by element migration, concentration and dispersion, crystalline and dynamic differentiation of crystals, metamorphism, etc. (Yang Kaiqing. 1986; Yang Kaiqing et al., 1986). The dynamic adjustment of crustal materials in the middle-lower reaches of the Yangtze mainly occurred in the Mesozoic under the conditions of intense collision between the North China (Dabie) massif and the Yangtze massif. The structural adjustment refers to various types of deformation within the two massifs and the intensive shortening of the stratigraphic coyer of the Yangtze massif, whereas the compositional adjustment implies the structural remelting of the basement and the ore. and rock- forming processes in the two massifs.

关键词： Tectonodynamic Adjustment of Crustal Materials in the Middle-Lower Reaches of the Yangtze River

Characteristics of N Mineralization in Urban Soils of hefei,East China

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Pedosphere 2010年第2期20卷 236-244页

作者： ZHANG Kai,XU Xiao-Niu and WANG Qin School of Forestry and Landscape Architecture,anhui Agricultural University,hefei 230036 (China) [a] School of Forestry and Landscape Architecture Anhui Agricultural University Hefei 230036 (China)

Nitrogen cycling has been poorly characterized in urban *** in-situ buried bag incubation technique was used to quantify net rates of N mineralization and nitrification in soils of two urban sites,a street greening belt and a university campus,and a suburban site,a forest park,in hefei,East *** average concentration of extractable NO 3 in the surface soil (0-10 cm) was significantly higher at the urban sites than the suburban park site,whereas extractable NH + 4 concentration was significantly higher at the suburban park site than the urban *** forest park soil had greater potential N mineralization (148.1 μg N cm 3) than the soils from the campus (138.3 μg N cm 3) and street (99.8 μg N cm 3).The net mineralization rates varied between 1.63 and 2.69 μg N cm 3 d 1 and net nitrification rates between 0.82 and 1.02 μg N cm 3 d 1 at the suburban forest park site,but the rates varied from 1.27 to 2.41 μg N cm 3 d 1 and from 1.07 to 1.49 μg N cm 3 d 1,respectively,at the urban campus *** net mineralization and nitrification rates were lower during dry *** from regression analysis indicated that net N mineralization was significantly and positively correlated with soil moisture and soil C/N ratio,and was negatively correlated with soil *** nitrification was,however,significantly and negatively correlated with soil moisture and soil C/N ratio,and was positively correlated with soil *** relative nitrification was 0.763,indicating the dominance of nitrate cycling relative to ammonium cycling at the urban *** urban soils had the great potential for N losses compared to the suburban soils.

关键词： nitrification nitrogen cycling soil properties

On Metallogenic Conditions and Regularities of the Lower and Middle Reaches of the Changjiang River

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Acta Geologica Sinica(English Edition) 1988年第4期1卷 435-449页

作者： Liu Xiangpei Chang Yinfo Wu Yenchang anhui Bureau of Geology and Mineral Resources, hefei, anhui anhui Institute of Geological Sciences, hefei, anhui anhui BUR GEOL & MINERAL RESOURCES HEFEIPEOPLES R CHINA anhui INST GEOL SCI HEFEIPEOPLES R CHINA

The paper deals with the metallogenic conditions and regularities of the region ol the lower-middle reachesof the Changjiang River in China. The complicated structural network with the Changjiang (Yangtse) deepfracture as its trunk is the leading rock-and ore-controlling structure of the metallogenic belt. Thehigh-potassium granodiorites of the first magmatic sequence of the Mesozoic Yangtse syntexis type and thesodium-rich diorites of the second sequence are genetically related to the copper ore series and the iron ore se-ries respectively. and occur respectively in the block-faulted and-folded uplift area and the down-faulted vol-canic basin as well as the transitional zone between the two. The ore-hosting horizons show specific associa-tions of rocks and often contain ore beds basically of stratabound nature.

关键词： Cu In On Metallogenic Conditions and Regularities of the Lower and Middle Reaches of the Changjiang River

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环境污染强制责任保险实施策略及其影响因素

经济地理 2024年第3期44卷 138-146页

作者：黄鹤菲米运生华南农业大学经济管理学院广东广州510642

环境污染强制责任保险(即“环强险”)是一种利用市场机制化解突发环境事件风险、防治环境污染的创新型金融措施,对实现经济社会高质量发展具有重要意义。文章运用不完全信息动态博弈模型,分析了政府、企业、保险公司作为决策主体参与环... 详细信息

环境污染强制责任保险(即“环强险”)是一种利用市场机制化解突发环境事件风险、防治环境污染的创新型金融措施,对实现经济社会高质量发展具有重要意义。文章运用不完全信息动态博弈模型,分析了政府、企业、保险公司作为决策主体参与环境污染强制责任保险的最优策略和均衡条件,并以深圳市为例进行了实证分析。研究发现:(1)政府制定的企业责任分担因子与环境事故风险和损失呈负相关,保费与保险公司责任分担因子呈正相关,企业投保概率与企业责任分担因子呈正相关。(2)深圳市作为中国较早一批环境污染强制责任保险试点示范城市,其责任分担因子现在为企业承担较多赔偿责任,而保险公司承担较少赔偿责任。(3)根据模型分析结果可知企业投保意愿有限,这与其环强险实际投保概率仅有50%的情况相吻合。在此基础上,提出政府应适当补贴企业和保险公司,针对高风险高损失的产业,由保险公司承担更多责任,并赋予保险公司监督权限,针对企业制定严格的环保标准和罚款制度,要在促使企业主动投保的同时履行环保义务等对策建议。

关键词：环境污染强制责任保险不完全信息动态博弈模型绿色金融企业与保险公司政府高风险高损害产业环境风险管理

Reflection on methodology of the correlation between electromagnetic interference and safety in high-speed railway

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Railway Sciences 2024年第1期3卷 84-96页

作者： Chang Liu Shiwu Yang Yixuan Yang hefei Cao Shanghe Liu Department of Electromagnetic Environmental Effects Technology Studio CRSC Research and Design Institute Group Co.Ltd.BeijingChina School of Traffic and Transportation Shijiazhuang Tiedao UniversityShijiazhuangChina School of Automation and Intelligence Beijing Jiaotong UniversityBeijingChina Infrastructure Technology Research Institute CRSC Research and Design Institute Group Co.Ltd.BeijingChina Research Center for Electromagnetic Environmental Effects Shijiazhuang Tiedao UniversityShijiazhuangChina

Purpose – In the continuous development of high-speed railways, ensuring the safety of the operation controlsystem is crucial. Electromagnetic interference (EMI) faults in signaling equipment may cause transportationinterruptions, delays and even threaten the safety of train operations. Exploring the impact of disturbances onsignaling equipment and establishing evaluation methods for the correlation between EMI and safety isurgently ***/methodology/approach – This paper elaborates on the necessity and significance of studying theimpact of EMI as an unavoidable and widespread risk factor in the external environment of high-speed railwayoperations and continuous development. The current status of research methods and achievements from theperspectives of standard systems, reliability analysis and safety assessment are examined layer by ***, it provides prospects for innovative ideas for exploring the quantitative correlation between EMIand signaling *** – Despite certain innovative achievements in both domestic and international standard systems andrelated research for ensuring and evaluating railway signaling safety, there’s a lack of quantitative and strategic research on the degradation of safety performance in signaling equipment due to EMI. A quantitativecorrelation between EMI and safety has yet to be established. On this basis, this paper proposes considerationsfor research methods pertaining to the correlation between EMI and ***/value – This paper overviews a series of methods and outcomes derived from domestic andinternational studies regarding railway signaling safety, encompassing standard systems, reliability analysisand safety assessment. Recognizing the necessity for quantitatively describing and predicting the impact ofEMI on high-speed railway signaling safety, an innovative approach using risk assessment techniques as abridge to establish the correlation between EMI and signaling safety is proposed.

关键词： Electromagnetic interference Reliability Safety Risk assessment Signaling system High-speed railway

Simultaneous production of high-frequency synthetic apomixis with high fertility and improved agronomic traits in hybrid rice

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Molecular Plant 2024年第1期17卷 4-7页

作者： Mengqiu Song Wumei Wang Chun Ji Shengnan Li Wei Liu Xiaoyu Hul anhui Feng Shuang Ruan Shiyun Du Huan Wang Kui Dai Longbiao Guo Qian Qian Hongqi Si Xingming Hu College of Agronomy Anhui Agricultural UniversityHefeiAnhui 230036China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhouZhejiang 310006China Rice Research Institute Anhui Academy of Agricultural SciencesHefeiAnhui 230031China Jiangxi Modern Seed Industry Co.NanchangJiangxi 330026China

Dear Editor,Utilization of heterosis is fundamental to modern agricultural improvement and contributes significantly to food security and agricultural development(Ouyang et al.,2022).However,heterosis of F,hybrids cannot be stably ***,or asexual reproduction through seeds,offers the potential for the fixation of heterosis in F,hybrids and the formation of clonal offspring,which could have considerable implications for plant breeding and agriculture(Schmidt,2020).But naturally occurring apomixis has never been found in major ***,synthetic apomixis has been successfully generated by inducing incomplete meiotic development combined with parthenogenesis development to produce cloned rice(Oryza sativa)seeds(Khanday et al.,2019;Wang et al.,2019;Vernet et al.,2022;Wei et al.,2023).

关键词： sativa fertility breeding

On Integrating Topic-based Oral English Teaching from the Perspective of Self-Access Learning

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学术界 2010年第11期 245-252页

作者： Zhang Xiaoman (hefei University of Technology,anhui hefei 230009) hefei University of Technology Anhui Hefei230009

This paper discusses the relationship between self-access learning and oral English *** proposes that self-access learning should be integrated with topic-based oral English *** holds that oral English teaching is a dynamic interaction among students,teachers,tasks and *** interaction is essential in achieving the teaching result,so the teacher should motivate the students’ learning *** designing three stages of application,namely,pre-class preparation,operating the course and post-class monitoring mechanism,the author want to,against the background of the reform of College English teaching,establish the self-accessible learning mechanism suited to promote the oral ability of college students,enhance their overall speaking performance,promote their autonomous monitoring of speaking and set up positive attitudes towards involvement in speaking English actively,automatically,initiatively and creatively.

关键词： self-access learning topic-based teaching oral English ability oral English teaching

Generic modules for tilted algebras

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Chinese Science Bulletin 1997年第3期42卷 177-180页

作者： DU XiannengDepartment of Mathematics, anhui University, hefei 230039, China Department of Mathematics Anhui University Hefei China

IN the theory of infinite abelian groups, the concepts of torsion-free groups and divisible groups are well known. We know that there exists, up to isomorphism, one and only one abelian group which is both torsion-free and divisible at the same time. This is the additive group Q of the rational numbers. Q plays an important role in the study of infinite-abelian groups. The theory of infinite-dirnensional modules over a finite-dimensional algebra runs similarly to the theory of infinite abelian groups but there are also some substantial differences.

关键词： tilting modules tilted algebras tame hereditary algebras generic modules.

Melatonin ameliorates experimental hepatic fibrosis induced by carbon tetrachloride in rats

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World Journal of Gastroenterology 2009年第12期15卷 1452-1458页

作者： Ru-Tao Hong,Department of Geriatrics Medicine,The First Affiliated Hospital of anhui Medical University,hefei 230022,anhui Province,China Ru-Tao Hong,Jian-Ming Xu,Qiao Mei,Department of Gastroenterology,The First Affiliated Hospital of anhui Medical University,hefei 230022,anhui Province,China The Key Laboratory of Digestive Diseases of anhui Province,hefei 230022,anhui Province,China Department of Gastroenterology The First Affiliated Hospital of Anhui Medical University Hefei 230022 Anhui Province China. xhkay@***

AIM:To investigate the protective effects of melatonin on carbon tetrachloride(CCl4)-induced hepatic fibrosis in experimental ***:All rats were randomly divided into normal control group,model control group treated with CCl4 for 12 wk,CCl4+NAC group treated with CCl4+NAC(100 mg/kg,i.p.)for 12 wk,CCl4+MEL-1 group treated with CCl4+melatonin(2.5 mg/kg)for 12 wk,CCl4+MEL-2 group treated with CCl4+ melatonin(5.0 mg/kg)for 12 wk,and CCl4+MEL-3 group treated with CCl4+melatonin(10 mg/kg).Rats in the treatment groups were injected subcutaneously with sterile CCl4(3 mL/kg,body weight)in a ratio of 2:3 with olive oil twice a *** in normal control group received hypodermic injection of olive oil at the same dose and frequency as those in treatment *** the end of experiment,rats in each group were anesthetized and *** and eosin(HE)staining and Van Gieson staining were used to examine changes in liver *** activities of alanine aminotransferase(ALT),aspartate aminotransferase(AST)and protein concentration weremeasured with routine laboratory methods using an ***(HYP)content in liver and malondialdehyde(MDA)and glutathione peroxidase(GPx)levels in liver homogenates were assayed by *** hyaluronic acid(HA),laminin(LN),and procollagenⅢN-terminal peptide(PⅢNP)were determined by ***:Pathologic grading showed that the fibrogenesis was much less severe in CCl4+MEL3 group than in model control group(u=2.172,P<0.05),indicating that melatonin(10 mg/kg)can significantly ameliorate CCl4-induced hepatic fibrotic *** serum levels of ALT and AST were markedly lower in CCl4+MEL treatment groups(5,10 mg/kg)than in model control group(ALT:286.23 ±121.91 U/L vs 201.15±101.16 U/L and 178.67 ±103.14 U/L,P=0.028,P=0.007;AST:431.00 ±166.35 U/L vs 321.23±162.48 U/L and 292.42 ±126.23 U/L,P=0.043,P=0.013).Similarly,the serum laminin(LN)and hyaluronic acid(HA)levels and hydroxyproli

关键词： Melatonin Hepatic fibrosis Oxidativestress Hyaluronic acid Laminin Malondialdehyde Glutathione peroxidase