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Beauty Restored xiamen presents a successful case of sustainable development of a bay city

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ChinAfrica 2025年第1期17卷 36-39页

作者： xia YUANYUAN xiamen

Riding along xiamen’s Xinglin Bay Marine Bicycle Lane feels like gliding between the sea and *** 2.6-km-long pathway,built above the sea,links two sides of the bay.

关键词： xiamen Marine sustainable

玛北油田xia72井断块百口泉组钙质砂砾岩成因

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新疆石油地质 2022年第4期43卷 404-409页

作者：伍顺伟夏学领朱世杰中国石油新疆油田分公司勘探开发研究院新疆克拉玛依834000 北京阳光杰科科技股份有限公司北京100192

玛北油田MA131井区xia72井断块下三叠统百口泉组油层段多井钻遇钙质砂砾岩,气测全烃含量低,储集层物性和含油性差,影响了水平井油层钻遇率和后期水平井部署。根据岩心、测井、地震等资料,对xia72井断块百口泉组钙质砂砾岩的成因、识别... 详细信息

玛北油田MA131井区xia72井断块下三叠统百口泉组油层段多井钻遇钙质砂砾岩,气测全烃含量低,储集层物性和含油性差,影响了水平井油层钻遇率和后期水平井部署。根据岩心、测井、地震等资料,对xia72井断块百口泉组钙质砂砾岩的成因、识别方法及分布规律进行了研究。结果表明,研究区钙质砂砾岩的钙质胶结物形成于成岩晚期,钙质胶结物对储集层具有破坏作用,钙质砂砾岩的分布主要受沉积相和早期断层控制,具有高电阻率、高密度和低声波时差的测井响应特征,地震剖面上表现为“亮点”反射特征。采用最大似然体、均方根振幅及最大振幅,对研究区钙质砂砾岩分布进行了预测,其中,最大振幅能够精确反映其展布特征。研究区钙质砂砾岩表现为受沉积微相控制的团块状和断层控制的南北向条带状分布特征,根据此预测结果,对27口水平井的部署进行优化。

关键词：准噶尔盆地玛湖凹陷玛北油田百口泉组钙质砂砾岩测井响应地震属性

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miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

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Neural Regeneration Research 2025年第1期20卷 277-290页

作者： Meng Cong Jing-Jing Hu Yan Yu xiao-Li Li xiao-Ting Sun Li-Ting Wang xia Wu Ling-Jie Zhu xiao-Jia Yang Qian-Ru He Fei Ding Hai-Yan Shi School of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

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Potential dependence in electrocatalysis: a theoretical perspective

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Science China Chemistry 2025年第1期68卷 21-25页

作者： Leyu Liu Zhaoming xia Zeyu Wang Yinjuan Chen Hai xiao Department of Chemistry Tsinghua University Fundamental Science Center of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation Center Changzhou University

Electrocatalysis is a key technology for the new energy era and sustainable development, serving as the interface for interconversion of electrical and chemical energies, which spans a wide spectrum of applications in sustainable energy and environmental engineering. Electrocatalytic reactions including electrochemical CO2reduction reaction （eCO2RR）, hydrogen evolution reaction （HER）, and oxygen evolution/reduction reactions （OER/ORR）, hold essential promise for renewable energy technologies as well as complement the biogeochemical carbon and oxygen cycles.

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AHDC1基因突变致xia-Gibbs综合征1例报告并文献复习

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临床儿科杂志 2019年第11期37卷 847-850页

作者：杨书婷李梅贾春颖冉艳萍吴霞重庆医科大学附属儿童医院神经内科儿童发育疾病研究教育部重点实验室儿童发育重大疾病国家国际科技合作基地儿科学重庆市重点实验室

目的探讨AHDC1基因突变致xia-Gibbs综合征的临床表现、基因变异特点。方法回顾分析2018年12月接诊的1例AHDC1基因突变致xia-Gibbs综合征患儿的临床资料,并结合文献分析xia-Gibbs综合征患儿的临床表现、基因突变特点。结果男性患儿,5岁7... 详细信息

目的探讨AHDC1基因突变致xia-Gibbs综合征的临床表现、基因变异特点。方法回顾分析2018年12月接诊的1例AHDC1基因突变致xia-Gibbs综合征患儿的临床资料,并结合文献分析xia-Gibbs综合征患儿的临床表现、基因突变特点。结果男性患儿,5岁7月,以全面发育落后、面容特殊,耳位低,拇指内收为主要表现;头颅CT示双侧小脑半球后外方脑外间隙增宽、蛛网膜囊肿。学龄前儿童韦克斯勒氏智能测试提示智商重度低下。全外显子检测发现AHDC1基因新发剪切突变c.3185_c.3186 delCA,导致蛋白编码提前终止(p.T 1062 Sfs*63),确诊为xia-Gibbs综合征。检索万方数据库,检出中文文献1篇;检索PubMed及Medline,检出英文文献16篇;合并该患儿共35例xia-Gibbs综合征患儿,其中34例为AHDC1基因新发突变,1例为包含AHDC1基因在内的染色体微缺失所致。结论xia-Gibbs综合征是由AHDC1基因新发突变所致神经系统疾病,其突变位点及临床表现的特异性目前尚无定论,二者的相关性有待进一步研究。

关键词： xia-Gibbs综合征 AHDC1基因突变全外显子测序儿童

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Inexact proximal gradient algorithm with random reshuffling for nonsmooth optimization

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Science China(Information Sciences) 2025年第1期68卷 219-237页

作者： xia JIANG Yanyan FANG xianlin ZENG Jian SUN Jie CHEN National Key Lab of Autonomous Intelligent Unmanned Systems School of AutomationBeijing Institute of Technology Beijing Institute of Technology Chongqing Innovation Center School of Electronic and Information Engineering Tongji University

Proximal gradient algorithms are popularly implemented to achieve convex optimization with nonsmooth regularization. Obtaining the exact solution of the proximal operator for nonsmooth regularization is challenging because errors exist in the computation of the gradient; consequently, the design and application of inexact proximal gradient algorithms have attracted considerable attention from researchers. This paper proposes computationally efficient basic and inexact proximal gradient descent algorithms with random reshuffling. The proposed stochastic algorithms take randomly reshuffled data to perform successive gradient descents and implement only one proximal operator after all data pass through. We prove the convergence results of the proposed proximal gradient algorithms under the sampling-without-replacement reshuffling *** computational errors exist in gradients and proximal operations, the proposed inexact proximal gradient algorithms can converge to an optimal solution neighborhood. Finally, we apply the proposed algorithms to compressed sensing and compare their efficiency with some popular algorithms.

关键词： proximal operator random reshuffling inexact computation compressed sensing nonsmooth optimization

SHANG xia A fiery beacon of spring

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城市漫步（上海版、英文） 2016年第2期 38-38页

作者： VIRGINIA WERNER SHANG xia Jiang Qiong Er 不详

It might still be cliilly outside,but fasliion,as we know,is always aliead of *** so it's no surprise Shang xia has just released their enchanting new Spring/Summer ***-its beauty,vastiiess and sheer grandeur-is tlie main inspiration beliiiid tlie lines for 2016s wanner *** xia has captured its rhydun,and combined it with modem city living,and the result is a dazzling array of garbs,gathered ill tlie Urban and Nature(Clieng Slii Shan Shui)collection.

关键词： spring modem outside

利用xia-Wang定理求随机变量的数学期望和方差

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高等数学研究 2022年第4期25卷 86-88页

作者：黄佳佳夏天贵州财经大学数统学院贵州贵阳550025

本文研究利用xia-Wang定理计算离散随机变量数学期望和方差的方法,通过实例说明了该方法的有效性和可行性.

关键词： xia-Wang定理再生散度模型数学期望方差离散型随机变量

Intermolecular reductive coupling of aliphatic ketones with alkynes and alkenes by BCN photocatalysts

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Science China Chemistry 2025年第1期68卷 181-185页

作者： Yanping xia Luyang Sun Jiajia Cheng Sibo Wang Meifang Zheng Xinchen Wang State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University

A photocatalytic process was developed for intermolecular reductive coupling of aliphatic ketones with alkynes/alkenes to furnish tertiary alcohols. Mechanistic studies support that boron carbonitrides(BCN) promote the single electron reduction of unactivated aliphatic ketones to generate ketyl radicals with visible light irradiation, which then react with alkynes and alkenes to afford the allylic and aliphatic alcohols, respectively. The heterogeneous photocatalytic system is compatible with diverse substrates including pharmaceutical-related molecules(43 examples) with reusability and scale-up experiments, verifying the complementary synthetic utility of this method to the homogeneous catalysts.

关键词： aliphatic ketones ketyl radical intermolecular cross-coupling tertiary alcohols