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基于三生空间视角的福建省生态安全综合评价

环境生态学 2024年第10期6卷 1-9页

作者：李晓宇徐德琳王燕于颖卓徐梦佳生态环境部南京环境科学研究所江苏南京210042

以“生产、生活、生态”三生空间结构为研究切入点,构建了一套涵盖产业、人居环境和自然环境的综合性评价指标体系,并运用层次分析法对福建省九大地级市在2010年、2015年以及2018年的生态安全状况进行了综合评估与时空演变规律剖析。研... 详细信息

以“生产、生活、生态”三生空间结构为研究切入点,构建了一套涵盖产业、人居环境和自然环境的综合性评价指标体系,并运用层次分析法对福建省九大地级市在2010年、2015年以及2018年的生态安全状况进行了综合评估与时空演变规律剖析。研究揭示了以下几点:1)2010—2018年间,福建省各城市的生态安全综合指数呈现持续增长态势,总体生态安全形势趋于良好;2)研究发现福建省内生态安全综合指数的空间分布具有显著差异性,具体表现为内陆西北部地区的指数高于东南沿海地带,并且这种空间差异随时间推移呈现逐步缩小的趋势;3)通过深入指标解析,确认导致福建省生态安全水平变化的主要因素包括:产业结构不尽合理、城市宜居性能尚待提高,以及部分自然环境问题的改善难度较大等。

关键词：生态安全三生空间层次分析法福建省

Origin软件在“微生物学”实验教学中的应用——以细菌生长曲线的测定实验为例

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教育教学论坛 2024年第11期 21-24页

作者：郭佳唐雅丽雷腊梅许德麟暨南大学生命科学技术学院广东广州510632

针对高校本科“微生物学”实验教学中遇到的数据处理问题,以细菌生长曲线测定的实验为例,使用Origin 2022软件进行数据导入、数据计算、图形绘制及插入误差棒等操作,完成细菌生长曲线的绘制。结果表明,利用Origin软件可以快速对实验数... 详细信息

针对高校本科“微生物学”实验教学中遇到的数据处理问题,以细菌生长曲线测定的实验为例,使用Origin 2022软件进行数据导入、数据计算、图形绘制及插入误差棒等操作,完成细菌生长曲线的绘制。结果表明,利用Origin软件可以快速对实验数据进行批量处理,操作简捷并可避免人工计算的误差,对实验得到的非线性数据通过软件可以拟合出美观的图形,将实验结果可视化。在教学中通过引入Origin软件,可以在讲授具体微生物知识的同时,让本科生掌握一款专业的数据分析处理软件,有助于培养本科生的数据处理能力,提高综合科研素养,为后续实验课程和科研工作的数据处理工作打好基础。

关键词：微生物学实验 Origin 数据处理生长曲线实验教学改革

Relationship of familial cytochrome P450 4V2 gene mutation with liver cirrhosis:A case report and review of the literature

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World Journal of Clinical Cases 2022年第28期10卷 10346-10357页

作者： Jin-Lian Jiang Jiang-Fu Qian de-Hui Xiao Xia Liu Fang Zhu Jie Wang Zhou-Xiong Xing de-lin xu Yuan xue Yi-Huai He department of Infectious Diseases Affiliated Hospital of Zunyi Medical UniversityZunyi 563003Guizhou ProvinceChina department of Digestion Dafang County People’s HospitalBijie 551600Guizhou ProvinceChina department of Intensive Care Affiliated Hospital of Zunyi Medical UniversityZunyi 563000Guizhou ProvinceChina department of Cell Biology Zunyi Medical UniversityZunyi 563099Guizhou ProvinceChina department of Liver Diseases the Third People’s Hospital of ChangzhouChangzhou 213000Jiangsu ProvinceChina

BACKGROUND Many genetic and metabolic diseases affect the liver,but diagnosis can be difficult because these diseases may have complex clinical manifestations and diverse clinical *** is also incomplete clinical knowledge of these many different diseases and limitations of current testing *** SUMMARY We report a 53-year-old female from a rural area in China who was hospitalized for lower limb edema,abdominal distension,cirrhosis,and *** excluded the common causes of liver disease(drinking alcohol,using traditional Chinese medicines,hepatitis virus infection,autoimmunity,and hepatolenticular degeneration).When she was 23-years-old,she developed night-blindness that worsened to complete blindness,with no obvious *** parents were first cousins,and both were *** of the patient’s family history indicated that all 5 siblings had night blindness and impaired vision;one sister was completely blind;and another sister had night-blindness complicated with cirrhosis and subclinical *** exome sequencing showed that the patient,parents,and siblings all had mutations in the cytochrome P450 4V2gene(CYP4V2).The CYP4V2 mutations of the parents and two sisters were heterozygous,and the others were *** siblings also had heterozygous dual oxidase activator 2(DUOXA2) *** Mutations in the CYP4V2 gene may affect lipid metabolism and lead to chronic liver injury,fibrosis,and cirrhosis.

关键词： Cirrhosis Genetic metabolic liver disease Cytochrome P4504V2 Dual Oxidase activator 2 Bietti Crystalline corneoretinal dystrophy Case report

Boundary Behaviors for a Continuous-state Nonlinear Neveu’s Branching Process

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Acta Mathematica Sinica,English Series 2024年第8期40卷 2005-2016页

作者： lin Yu BAI xu YANG School of Mathematics and Information Science North Minzu UniversityYinchuan 750021P.R.China

By generalizing a criterion of Mufa Chen for Markov jump processes,we establish the necessary and sufficient conditions for the extinction,explosion and coming down from infinity of a continuous-state nonlinear Neveu... 详细信息

关键词： Continuous-state branching process nonlinear branching Neveu’s branching extinction explosion coming down from infinity

Effect of hot isostatic pressure on the microstructure and tensile properties of γ'-strengthened superalloy fabricated through induction-assisted directed energy deposition

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1089-1097页

作者： Jianjun xu Hanlin Ding Xin lin Feng Liu Analytical&Testing Center Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

The microstructure characteristics and strengthening mechanism of Inconel738LC(IN-738LC) alloy prepared by using induction-assisted directed energy deposition(IdeD) were elucidated through the investigation of samples subjected to IdeD under 1050℃ preheating with and without hot isostatic pressing(HIP,1190℃,105 MPa,and 3 h).Results show that the as-deposited sample mainly consisted of epitaxial columnar crystals and inhomogeneously distributed γ’ phases in interdendritic and dendritic core *** HIP,grain morphology changed negligibly,whereas the size of the γ’ phase became increasingly *** further heat treatment(HT,1070℃,2 h + 845℃,24 h),the γ’ phase in the as-deposited and HIPed samples presented a bimodal size distribution,whereas that in the as-deposited sample showed a size that remained *** comparison of tensile properties revealed that the tensile strength and uniform elongation of the HIP + HTed sample increased by 5% and 46%,respectively,due to the synergistic deformation of bimodal γ’phases,especially large cubic γ’ ***,the relationship between phase transformations and plastic deformations in the Ideded sample was discussed on the basis of generalized stability theory in terms of the trade-off between thermodynamics and kinetics.

关键词： directed energy deposition Ni-based superalloys high-temperature preheating hot isostatic pressing microstructure tensile properties

Thermal decomposition and Oxidative decomposition Mechanism of HFC-134a by Experimental and DFT Method

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Journal of Thermal Science 2024年第5期33卷 1990-2003页

作者： xu Yunting ZHANG Kai DAI Xiaoye SHI lin Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China

In response to the Kigali Amendment to the Montreal Protocol and global low-carbon emission environmental requirements,the phase-out and decomposition of numerous HFC refrigerants have become urgent,necessitating efficient and mild decomposition *** study investigates the thermal decomposition and oxidative thermal decomposition pathways of the typical hydrofluorocarbon refrigerant HFC-134a,employing a combination of experimental and quantum chemical DFT simulation *** chemical simulations reveal that the initial reaction bond cleavage serves as the rate-determining step during the thermal decomposition process,with the most easily detectable closed-shell products including CF_(2)=CHF,HF,CH_(3)F,CHF_(3),CH_(2)F_(2),and CF_(4).Reactive oxygen species can significantly reduce the Gibbs free energy barrier for HFC-134a *** achieve efficient degradation of HFC-134a,appropriate catalysts should be developed and selected to increase the level of reactive oxygen species in the reaction *** studies further corroborate that HFC-134a may undergo degradation through distinct reaction pathways under varying temperature(240℃to360℃)and pressure(0.1 MPa to 4.5 MPa)conditions,in agreement with simulation predictions.

关键词： HFC-134a pyrolysis oxidative thermal decomposition DFT refrigerant

Transverse mode-coupling instability with longitudinal impedance

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Nuclear Science and Techniques 2024年第6期35卷 40-53页

作者： Hai-Sheng xu Chun-Tao lin Na Wang Jing-Ye xu Yuan Zhang Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Institute of Advanced Science Facilities Shenzhen 518107GuangdongChina

Transverse mode-coupling instability(TMCI)is a dangerous transverse single-bunch instability that can lead to severe par-ticle *** mechanism of TMCI can be explained by the coupling of transverse coherent oscillation modes owing to the transverse short-range wakefield(i.e.,the transverse broadband impedance).Recent studies on future circular colliders,e.g.,FCC-ee,showed that the threshold of TMCI decreased significantly when both longitudinal and transverse impedances were *** performed computations for the circular electron-positron collider(CEPC)and observed a similar *** studies on the influence of longitudinal impedance on the TMCI threshold were *** concluded that the imaginary part of the longitudinal impedance,which caused a reduction in the incoherent synchrotron tune,was the primary reason for the reduction in the TMCI ***,the real part of the longitudinal impedance assists in increasing the TMCI threshold.

关键词： Transverse mode-coupling instability Longitudinal impedance

Evaluation of suitability,adaptability,and reserve potential of construction land on the Qinghai-Tibet Plateau

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Journal of Geographical Sciences 2024年第1期34卷 41-61页

作者： YANG Hua xu Yong ZHOU Kan WANG Lijia xu lin Key Laboratory of Regional Sustainable development Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Construction land is the leading carrier of human activities such as production and *** the construction land suitability(CLS)on the Qinghai-Tibet Plateau(QTP)holds significant implications for harmonizing the relationship between ecological protection and human activity and promoting population and industry layout ***,no relevant studies provide a complete CLS assessment of the *** this study,we developed a model-based CLS evaluation framework coupling of pattern and process to calculate the global CLS on the QTP based on a previously developed CLS evaluation ***,using the land-use data of 1990,2000,2010,and 2020,we examined the adaptability of existing construction land(ECL)to the CLS assessment result through the adaptability index and vertical gradient index and further analyzed the limitations of maladaptive construction ***,we calculated the potential area of reserve suitable construction *** article includes four conclusions:(1)The highly suitable,suitable,moderately suitable,marginally suitable,and unsuitable CLS classes cover areas of 0.33×10^(4)km^(2),10.42×10^(4)km^(2),18.06×10^(4)km^(2),24.12×10^(4)km^(2),and 205.29×10^(4)km^(2),*** approximately 11%of the study area on the QTP is suitable for large-scale permanent construction land,and approximately 79.50%of the area is unsuitable under current economic and technological conditions.(2)The ECL adaptability index is 85.16%,85.93%,85.18%,and 78.01%during 1990–2020,respectively,with an average adaptability index exceeding 80%on the *** ECL distribution generally conforms to construction land suitable space characteristics but with a significant spatial difference.(3)From 1990 to 2020,the maladaptive ECL was dominated by rural settlement land,transport land,and special land,with a rapidly increasing proportion of urban and other construction *** maladaptive ECL is constrained by both elevation and slope in the southern Qinghai Pla

关键词： land resource construction land suitability existing construction land adaptability human activity Qinghai-Tibet Plateau

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Chinese Journal of Electronics 2024年第3期33卷 683-693页

作者： Jiamei LIU lin TAN Hong xu PLA Strategic Support Force Information Engineering University

deoxys-BC is the primitive tweakable block cipher of the deoxys family of authenticated encryption *** on existing related-tweakey boomerang distinguishers,this paper improves the boomerang attacks on 11-round deoxys-BC-256 and 13-round deoxys-BC-384 by the optimized key guessing and the precomputation *** transfers a part of subtweakey guess in the key-recovery phase to the precomputation resulting in a significant reduction of the overall time *** 11-round deoxys-BC-256,we give a related-tweakey boomerang attack with time/data/memory complexities of 2218.6/2125.7/2125.7,and give another attack with the less time complexity of2215.8and memory complexity of 2120 when the adversary has access to the full *** 13-round deoxys-BC-384,we give a related-tweakey boomerang attack with time/dat a/memory complexities of 2k-96+2157.5/2120.4/*** the key size k=256,it reduces the time complexity by a factor of 231compared with the previous 13-round boomerang *** addition,we present two new related-tweakey boomerang distinguishers on 11-round deoxys-BC-384 with the same probability as the best previous distinguisher.

关键词： Ciphers Memory management Complexity theory Encryption Time complexity