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Impact of climate change on food security in the Central Asian countries

Science China Earth Sciences 2024年第1期67卷 268-280页

作者： fang su Yu LIU Lvfan CHEN Rustam OROZBAEV Liangcheng TAN School of Economics and Management Northwest UniversityXi’an 710127China School of Economics and Management Shaanxi University of Science and TechnologyXi’an 710021China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China Institute of Geology National Academy of Sciences of Kyrgyz RepublicBishkek 720040Kyrgyzstan Institute of Global Environmental Change Xi’an Jiaotong UniversityXi’an 710049China

The current and potential impacts of global warming have generated widespread concerns about food security among all sectors of *** Asian countries located deep in the interior of Asia with fragile ecological environments and lower agricultural technology are particularly more prone to severe threats from climate *** on panel data acquired in five Central Asian countries from 1990 to 2019,a C-D-C model was developed to study how climate change affects food security in the region and to predict future *** study found that the level of food security has generally increased for these five Central Asian countries over the past 30 years,with Kazakhstan and Tajikistan having the highest and lowest food security levels,*** average annual temperature and precipitation exhibit an inverted U-shaped relationship with the region’s food security,with the most positive effect on the food security of *** high and low temperatures have significantly affected food security in the studied region,with Turkmenistan experiencing the most significant negative *** number of frost days had no significant effect on food *** analysis of future climate showed that the temperature and precipitation in Central Asia will continue to increase from 2030 to 2090,which will negatively impact the food security of these *** is recommended that the Central Asian countries enhance their understanding of climate risks,strengthen scientific climate research,and develop multiple adaptation strategies in ***,they are encouraged to consolidate international cooperation,reducing greenhouse gas emissions effectively and maintaining the ability to ensure food security.

关键词： Global warming Extreme climate Food security Future forecasts Five Central Asian countries

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Asymptotic Property of Parabolic Equations Involving Pseudo-relativistic Schr?dinger Operators

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Acta Mathematicae Applicatae Sinica 2024年

作者： Chen QIAO su-fang TANG School of Mathematics and Statistics Shaanxi Normal University School of Mathematics Xi'an University of Finance and Economics

In this paper, we investigate parabolic equations involving nonlocal pseudo-relativistic Schr?dinger operators（-△+ m2）swith s ∈（0, 1） and mass m > 0 in bounded regions. We establish the asymptotic narrow region principle and asymptotic strong maximum principle for anti symmetric function. As applications,employing the method of moving planes, we show the asymptotical radial symmetry and monotonicity of positive solutions in an unit ball.

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Virtual Element Method for the Elastic Transmission Eigenvalue Problem with Equal Elastic Tensors

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Acta Mathematica Sinica,English Series 2024年

作者： Jian Meng Bing-Bing Xu fang su Xu Qian Songhe Song Department of Mathematics College of Science National University of Defense Technology Institute of Continuum Mechanics Leibniz Universit?t Hannover

The elastic transmission eigenvalue problem is fundamental to the qualitative methods for inverse scattering involving penetrable obstacles. Although simply stated as a coupled pair of elastodynamic wave equations, the elastic transmission eigenvalue problem is neither self-adjoint nor elliptic. The aim of this work is to provide a systematic spectral approximation analysis for the VEM of the elastic transmission eigenvalue problem with equal elastic tensors. Considering standard assumptions on polygonal/polyhedral meshes, we prove the stability analysis of the associated VEM bilinear forms, which shall be applied to the well-defined property of the discrete solution *** the correct approximation of spectrum for the proposed VEM scheme is proven. Necessitated by supporting the convergence analysis, a series of numerical examples are reported. In addition, some negative points of the current VEM scheme are considered, including the locking phenomenon and the influence of VEM stabilization parameters. Thanks to the flexibility of construction for the VEM space, the locking-free and stabilization-free VEM approaches are utilized to tackle with these negative aspects.

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Protein tyrosine phosphatase non-receptor Ⅱ:A possible biomarker of poor prognosis and mediator of immune evasion in hepatocellular carcinoma

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 3913-3931页

作者： Hui-Yuan Li Yi-Ming Jing Xue Shen Ming-Yue Tang Hong-Hong Shen Xin-Wei Li Zi-Shu Wang fang su Department of Medical Oncology The First Affiliated Hospital of Bengbu Medical UniversityBengbu 233000Anhui ProvinceChina Department of Neurology The First Affiliated Hospital of Bengbu Medical UniversityBengbu 233000Anhui ProvinceChina

BACKGROUND The incidence of primary liver cancer is increasing year by *** 2022 alone,more than 900000 people were diagnosed with liver cancer worldwide,with hepatocellular carcinoma(HCC)accounting for 75%-85%of *** is the most common primary liver *** has the highest incidence and mortality rate of HCC in the world,and it is one of the malignant tumors that seriously threaten the health of Chinese *** onset of liver cancer is occult,the early cases lack typical clinical symptoms,and most of the patients are already in the middle and late stage when ***,it is very important to find new markers for the early detection and diagnosis of liver cancer,improve the therapeutic effect,and improve the prognosis of *** tyrosine phosphatase non-receptor 2(PTPN2)has been shown to be associated with colorectal cancer,triple-negative breast cancer,non-small cell lung cancer,and prostate cancer,but its biological role and function in tumors remain to be further *** To combine the results of relevant data obtained from The Cancer Genome Atlas(TCGA)to provide the first in-depth analysis of the biological role of PTPN2 in *** The expression of PTPN2 in HCC was first analyzed based on the TCGA database,and the findings were then verified by immunohistochemical staining,quantitative real-time polymerase chain reaction(qRT-PCR),and *** value of PTPN2 in predicting the survival of patients with HCC was assessed by analyzing the relationship between PTPN2 expression in HCC tissues and clinicopathological ***,the potential of PTPN2 affecting immune escape of liver cancer was evaluated by tumor immune dysfunction and exclusion and immunohistochemical *** The results of immunohistochemical staining,qRT-PCR,and immunoblotting in combination with TCGA database analysis showed that PTPN2 was highly expressed and associated with a poor prognosis in HCC *** Encyclopedia of Ge

关键词： Protein tyrosine phosphatase non-receptor 2 Hepatocellular carcinoma Immune evasion Biomarker Immunotherapy Prognosis

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谁能返乡再就业——来自回流人口工作分化的微观证据

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山西财经大学学报 2024年第1期46卷 1-14页

作者：苏芳芳盖庆恩上海财经大学财经研究所上海200433

让返乡人才“回得来、留得住、用得好”是实现乡村振兴的重要保障。基于中国家庭金融调查数据(CHFS),梳理回流人口的工作分化情况,实证分析回流人口工作性质分化的影响因素和影响机制,并进一步研究工作收入分化的原因。研究发现:(1)外... 详细信息

让返乡人才“回得来、留得住、用得好”是实现乡村振兴的重要保障。基于中国家庭金融调查数据(CHFS),梳理回流人口的工作分化情况,实证分析回流人口工作性质分化的影响因素和影响机制,并进一步研究工作收入分化的原因。研究发现:(1)外地创业经历能促进返乡创业,发达地区务工经历、回流地较好的产业发展水平显著有利于回流人口返乡再就业;(2)回流地的产业发展主要通过提供非农就业机会促进返乡再就业;(3)市场环境和政策差异是造成回流人口工作收入分化的最主要因素。

关键词：回流人口工作分化务工经历产业发展非农就业机会

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Plexin domain-containing 1 may be a biomarker of poor prognosis in hepatocellular carcinoma patients,may mediate immune evasion

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2091-2112页

作者： Ming-Yue Tang Xue Shen Run-Sheng Yuan Hui-Yuan Li Xin-Wei Li Yi-Ming Jing Yue Zhang Hong-Hong Shen Zi-Shu Wang Lei Zhou Yun-Chuan Yang He-Xin Wen fang su Department of Medical Oncology The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Otolaryngology and Head and Neck surgery The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Department of Neurology The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Department of Hepatobiliary surgery The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Department of Gastrointestinal surgery The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina

BACKGROUND For the first time,we investigated the oncological role of plexin domain-containing 1(PLXDC1),also known as tumor endothelial marker 7(TEM7),in hepatocellular carcinoma(HCC).AIM To investigate the oncological profile of PLXDC1 in *** Based on The Cancer Genome Atlas database,we analyzed the expression of PLXDC1 in *** immunohistochemistry,quantitative real-time polymerase chain reaction(qRT-PCR),and Western blotting,we validated our *** prognostic value of PLXDC1 in HCC was analyzed by assessing its correlation with clinicopathological features,such as patient survival,methylation level,tumor immune microenvironment features,and immune cell surface checkpoint ***,to assess the immune evasion potential of PLXDC1 in HCC,we used the tumor immune dysfunction and exclusion(TIDE)website and immunohistochemical staining *** Based on immunohistochemistry,qRT-PCR,and Western blot assays,overexpression of PLXDC1 in HCC was associated with poor *** and multivariate Cox analyses indicated that PLXDC1 might be an independent prognostic *** HCC patients with high methylation levels,the prognosis was worse than in patients with low methylation *** enrichment analysis of HCC tissues indicated that genes upregulated in the high-PLXDC1 subgroup were enriched in mesenchymal and immune activation signaling,and TIDE assessment showed that the risk of immune evasion was significantly higher in the high-PLXDC1 subgroup compared to the low-PLXDC1 *** high-risk group had a significantly lower immune evasion rate as well as a poor prognosis,and PLXDC1-related risk scores were also associated with a poor *** As a result of this study analyzing PLXDC1 from multiple biological perspectives,it was revealed that it is a biomarker of poor prognosis for HCC patients,and that it plays a role in determining immune evasion status.

关键词： Plexin domain-containing 1 Biomarker Immune evasion Prognosis Immunotherapy Hepatocellular carcinoma

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外语教材使用情境下学习者能动性个案研究——复杂动态系统理论视角

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中国外语 2024年第3期21卷 69-76页

作者：苏芳杨鲁新西安外国语大学北京外国语大学

能动性是学习者二语学习成就的决定性因素,但学界对教材使用情境下学习者能动性的探讨有限。本研究采用质性个案研究方法,运用复杂动态系统理论探究了外语教材使用情境下学习者能动性的促生过程,对访谈、课堂录像、叙事、实物资料等多... 详细信息

能动性是学习者二语学习成就的决定性因素,但学界对教材使用情境下学习者能动性的探讨有限。本研究采用质性个案研究方法,运用复杂动态系统理论探究了外语教材使用情境下学习者能动性的促生过程,对访谈、课堂录像、叙事、实物资料等多种来源数据进行分析,发现外语教材使用情境下学习者能动性系统是由个体系统、教学系统及社会文化系统构成的复杂嵌套系统,具有情境性及个体性特征。能动性的促生是系统要素变化产生扰动作用,经由初始态不断调适的自适应过程。本研究最后提出外语教材使用情境下学习者能动性涌现模型,揭示了系统要素间的相互作用机制,对教材使用研究及能动性研究具有一定的启示。

关键词：外语教材教材使用学习者能动性复杂动态系统理论

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英语记叙文写作学习中的学生教材使用:变革能动性视域

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外语界 2024年第2期 28-36页

作者：杨鲁新苏芳北京外国语大学中国外语教材研究中心、英语学院北京100089 西安外国语大学英文学院、外国语言学及应用语言学研究中心陕西西安710128

本研究使用质性个案研究方法,通过对访谈、课堂观察、学生习作、教材等多种来源数据的分析,从变革能动性视角探究学生在英语记叙文写作学习中的教材使用。研究发现,学生的英语记叙文写作在体裁知识、写作技巧、语言表述等方面存在问题... 详细信息

本研究使用质性个案研究方法,通过对访谈、课堂观察、学生习作、教材等多种来源数据的分析,从变革能动性视角探究学生在英语记叙文写作学习中的教材使用。研究发现,学生的英语记叙文写作在体裁知识、写作技巧、语言表述等方面存在问题。针对这些问题,学生发挥变革能动性,调用以教材为核心的各类资源,采取模仿、创造性融合等变革性行动开展写作活动,在记叙文写作的体裁知识、写作技巧和语言表述方面得到提升。本研究强调教材使用过程的互动性和动态生成性,能为教材研究与写作教学提供启发。

关键词：英语记叙文写作教材使用变革能动性双重刺激

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作为真实世界模拟器的媒介与后真相时代的“拨乱反正”——以Sora为例解析数字文明时代的媒介新范式

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新疆师范大学学报（哲学社会科学版） 2024年第4期45卷 143-148页

作者：喻国明苏芳北京师范大学新闻传播学院北京100875 北京师范大学传播创新与未来媒体实验平台北京100875

媒介中介了人们与客观经验世界的关系,使关于“真实”的问题作为元价值问题被提出。近年来,受社交媒体赋权和媒介的个性化分发等因素影响,后真相成为热词,文本认为,后真相实际是当前人类文明与技术文明断裂下时代症候的特有产物,应从媒... 详细信息

媒介中介了人们与客观经验世界的关系,使关于“真实”的问题作为元价值问题被提出。近年来,受社交媒体赋权和媒介的个性化分发等因素影响,后真相成为热词,文本认为,后真相实际是当前人类文明与技术文明断裂下时代症候的特有产物,应从媒介演化的视角看待这一现象。文本以人工智能文生视频大模型Sora为例,从互动的过程视角看待作为真实世界模拟器的Sora促成何种方式的社会连接和传播权力结构的重组,分析媒介连接对本真性和后真相的影响,并提出在新的数字文明时代如何在媒介域、技术域和社会域的互构中实现“共识的黄金时代”。

关键词：后真相生成式人工智能 Sora 第三空间社会共识

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马克思劳动幸福思想的科学内涵、存在形式及时代价值

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江苏行政学院学报 2024年第1期 97-104页

作者：柴素芳辛熙恒河北大学马克思主义学院河北保定071002

马克思揭示了自由自觉的劳动是实现人类普遍幸福的根本方式。从科学内涵看,马克思以“现实的人”为理论出发点,以“异化劳动批判”为核心要义,以“劳动解放”为价值目标建构起劳动幸福思想的逻辑前提,从“人的依赖关系”,“物的依赖性”... 详细信息

马克思揭示了自由自觉的劳动是实现人类普遍幸福的根本方式。从科学内涵看,马克思以“现实的人”为理论出发点,以“异化劳动批判”为核心要义,以“劳动解放”为价值目标建构起劳动幸福思想的逻辑前提,从“人的依赖关系”,“物的依赖性”,“个人全面发展”三个阶段考察了劳动幸福的历史向度,具有实践性、现实性和人民性的理论特质;从存在形式看,马克思劳动幸福思想致力于实现“人与自身之间”,“人与物之间”,“人与人之间”的和解;从时代价值看,马克思劳动幸福思想为中国式现代化建设提供了思想引领,为我国加强劳动教育提供了科学指南,为个人实现劳动幸福提供了实践参照。因此,研究马克思劳动幸福思想具有重要的理论意义和实践价值。

关键词：马克思劳动幸福科学内涵存在形式时代价值

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