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Chinese Geographical Science 2024年第1期34卷 1-18页

作者： WANG Xiaohui PENG Li huang kexin DENG Wei College of Geography and Resources Sichuan Normal UniversityChengdu610101China Key Laboratory of Land Resources Evaluation and Monitoring in Southwest Ministry of EducationSichuan Normal UniversityChengdu610101China

Urban shrinkage has emerged as a widespread phenomenon globally and has a significant impact on land,particularly in terms of land use and *** study focuses on 2851 county-level cities in China in 2005–2018(excluding Hong Kong,Macao,Taiwan,and‘no data’areas in Qinhai-Tibet Plateau)as the fundamental units of *** employing nighttime light(NTL)data to identify shrinking cities,the propensity score matching(PSM)model was used to quantitatively examine the impact of shrinking cities on land prices,and evaluate the magnitude of this *** findings demonstrate the following:1)there were 613 shrinking cities in China,with moderate shrinkage being the most prevalent and severe shrinkage being the least.2)Regional disparities are evident in the spatial distribution of shrinking cities,especially in areas with diverse terrain.3)The spatial pattern of land price exhibits a significant correlated to the economic and administrative levels.4)Shrinking cities significantly negatively impact on the overall land price(ATT=–0.1241,P<0.05).However,the extent of the effect varies significantly among different spatial *** study contributes novel insights into the investigation of land prices and shrinking cities,ultimately serving as a foundation for government efforts to promote the sustainable development of urban areas.

关键词： shrinking cities land price propensity score matching(PSM) relative effectiveness China

Bioresponsive micro-to-nano albumin-based systems for targeted drug delivery against complex fungal infections

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Acta Pharmaceutica Sinica B 2021年第10期11卷 3220-3230页

作者： Liting Cheng Miao-Miao Niu Tong Yana Zhongyi Ma kexin huang Ling Yang Xin Zhong Chong Li Medical Research Institute College of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China Key Laboratory of Drug Quality Control and Pharmacovigilance(Ministry of Education) China Pharmaceutical UniversityNanjing 210009China

As a typical human pathogenic fungus,Cryptococcus neoformans is a life-threatening invasive fungal pathogen with a worldwide distribution causing w700,000 deaths *** is not just an infection with multi-organ involvement,intracellular survival and extracellular multiplication of the fungus also play important roles in the pathogenesis of *** *** adequate accumulation of drugs at target organs and cells is still difficult to achieve,an effective delivery strategy is desperately required to treat these ***,we report a bioresponsive micro-to-nano(MTN)system that effectively clears the *** in *** strategy is based on our in-depth study of the overexpression of matrix metalloproteinase 3(MMP-3)in infectious microenvironments(IMEs)and secreted protein acidic and rich in cysteine(SPARC)in several associated target *** this MTN system,bovine serum albumin(BSA,a natural ligand of SPARC)was used for the preparation of nanoparticles(NPs),and then microspheres were constructed by conjugation with a special linker,which mainly consisted of a BSA-binding peptide and an MMP-3-responsive *** MTN system was mechanically captured by the smallest capillaries of the lungs after intravenous injection,and then hydrolyzed into BSA NPs by MMP-3 in the *** NPs further targeted the lung tissue,brain and infected macrophages based on the overexpression of SPARC,reaching multiple targets and achieving efficient *** have developed a size-tunable strategy where microspheres"shrink"to NPs in IMEs,which effectively combines active and passive targeting and may be especially powerful in the fight against complex fungal infections.

关键词： Albumin SPARC MMP-3 Size-tunable strategy Microenvironment responsive Complex fungal infection

Volcanism at the Permian-Triassic Boundary in South China and Its Effects on Mass Extinction

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Acta Geologica Sinica(English Edition) 1989年第4期63卷 417-431,450-451页

作者： Yin Hongfu, huang Siji, Zhang kexin, Yang Fengqing, Ding Meihua, Bi Xianmei and Zhang Suxin China University of Geosciences, Wuhan, Hubei China University of Geosciences Wuhan Hubei

This paper discusses the clayrocks widespread at the Permian-Triassic boundary, which are mostly of volcanic origin. Volcanogenetic textures, structures and minerals such as high-temperature quartz are found in clayrocks at the Permian-Triassic boundary in many places. Thousands of microspherules have been collected from the Boundary clayrocks, many of which exhibit the typical features of the process from melting to cooling and solidification. indicating that they were formed by volcanic eruption or extraterrestrial impact. Volcanic effects on the Permian-Triassic mass extinction may be reflected in conodonts, algae and ammonoids. The Boundary clayrocks are found in many Permian-Triassic sections along the coast of Tethys. Their orighin remains to be studied.

关键词： Volcanism at the Permian-Triassic Boundary in South China and Its Effects on Mass Extinction Mass

Derivative ghost imaging

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Chinese Optics Letters 2022年第1期20卷 23-28页

作者： Zhe Yang kexin huang Machi Zhang Dong Ruan Junlin Li State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China

We propose a new experimentally verified ghost imaging(GI) mechanism,derivative *** innovation is that we use the derivatives of the intensities of the test light and the reference light for *** results show that by combining derivative GI with the standard GI algorithm,multiple independent signals can be obtained in one *** combination greatly reduces the number of measurements and the time required for data acquisition and *** GI intrinsically does not produce the storage-consuming background term of GI,so it is suitable for on-chip implementation and makes practical application of GI easier.

关键词： ghost imaging derivative ghost imaging on-chip ghost imaging derivative Hanbury Brown and Twiss effect derivative of intensity

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加装旋转叶片T型通道内流动混合的数值模拟

工程热物理学报 2023年第1期44卷 86-94页

作者：黄可欣苏博林梅西安交通大学能源与动力工程学院西安710049

本文采用大涡模拟方法对加装旋转叶片的T型通道内冷热流体流动混合过程进行了数值模拟研究。在主管支管管径比为2:1的条件下,探究旋转叶片对T型通道内冷热流体混合的影响机理。通过对比分析有无叶片的T型通道内温度场,发现加装旋转叶片... 详细信息

本文采用大涡模拟方法对加装旋转叶片的T型通道内冷热流体流动混合过程进行了数值模拟研究。在主管支管管径比为2:1的条件下,探究旋转叶片对T型通道内冷热流体混合的影响机理。通过对比分析有无叶片的T型通道内温度场,发现加装旋转叶片能够加快通道底部和对称面两侧流体的温度混合从而缩短通道内的混合长度,同时能够减小y轴方向的平均温度梯度进而改善通道内的热分层现象。为进一步分析旋转叶片在T型通道内的作用方式,本文获取了叶片旋转至不同角度下T型通道内的速度场和涡结构分布,结果表明加入旋转叶片后通道内出现了马蹄涡、叶尖分离涡和条状涡等涡结构,加剧了流动的不规则性。

关键词：旋转叶片 T型通道混合过程数值模拟

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加装旋转叶轮T型通道流场的模态分解

化工学报 2023年第7期74卷 2848-2857页

作者：黄可欣李彤李桉琦林梅西安交通大学能源与动力工程学院陕西西安710049

采用动态模态分解方法对加装旋转叶轮T型通道内热混合数值模拟获得的压力场和涡量场进行了研究。通过对比不同叶片数(2~4片)的动态模态分解结果,获得了偏转射流条件(MR=0.49)下,主支管管径比为2的T型通道在转速为20 r/min时流场相干结... 详细信息

采用动态模态分解方法对加装旋转叶轮T型通道内热混合数值模拟获得的压力场和涡量场进行了研究。通过对比不同叶片数(2~4片)的动态模态分解结果,获得了偏转射流条件(MR=0.49)下,主支管管径比为2的T型通道在转速为20 r/min时流场相干结构的特征模态。通过观察压力分布特征模态的空间结构,发现相干结构主要出现在叶轮内部区域;涡量场特征模态的空间结构主要分布在叶尖处,同时在管壁附近也出现了少量条状相干结构。主导压力场和涡量场的2阶~4阶模态频率相等,对应叶片通过频率的1倍频、2倍频和3倍频。二者的第5阶模态频率随着叶片数的增加而趋于相等。此外,当模态频率为叶片通过频率倍频时,在叶片附近出现了“辐射状干涉条纹”。研究结果可为T型通道中的流动控制提供理论指导。

关键词：旋转叶轮 T型通道数值模拟混合动态模态分解

维普期刊数据库博看期刊

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为高职毕业生创设宽松的就业环境

中国职业技术教育 2006年第27期22卷 23-25页

作者：黄道平黄柯信浙江机电职业技术学院浙江杭州310053

本文从浙江省经济发展和高职教育发展的背景出发,分析了浙江省经济总量快速增长、民营经济迅猛发展、先进制造业基地正在着力打造和对外经济发展势头强劲等四方面对高职毕业生就业的影响;指出浙江省各级教育和用人单位为高职毕业生创设... 详细信息

本文从浙江省经济发展和高职教育发展的背景出发,分析了浙江省经济总量快速增长、民营经济迅猛发展、先进制造业基地正在着力打造和对外经济发展势头强劲等四方面对高职毕业生就业的影响;指出浙江省各级教育和用人单位为高职毕业生创设宽松的就业环境具有重大的现实意义。

关键词：高等职业院校毕业生就业环境现状与对策浙江

New strategy of S,N co‐doping of conductive‐copolymer‐derived carbon nanotubes to effectively improve the dispersion of PtCu nanocrystals for boosting the electrocatalytic oxidation of methanol

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Chinese Journal of Catalysis 2021年第7期42卷 1205-1215页

作者： Jingping Zhong kexin huang Wentao Xu Huaguo Tang Muhammad Waqas Youjun Fan Ruixiang Wang Wei Chen Yixuan Wang Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004GuangxiChina Department of Chemistry and Forensic Science Albany State UniversityAlbanyGA 31705USA Provincial Key Laboratory of Molecular Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250010ShandongChina Guangxi Engineering Center in Biomedical Material for Tissue and Organ Regeneration Life Sciences InstituteGuangxi Medical UniversityNanning 530021GuangxiChina

Efficacious regulation of the geometric and electronic structures of carbon nanomaterials via the introduction of defects and their synergy is essential to achieving good electrochemical ***,the guidelines for designing hybrid materials with advantageous structures and the fundamental understanding of their electrocatalytic mechanisms remain ***,superfine Pt and PtCu nanoparticles supported by novel S,N‐co‐doped multi‐walled CNT(MWCNTs)were prepared through the innovative pyrolysis of a poly(3,4‐ethylenedioxythiophene)/polyaniline copolymer as a source of S and *** uniform wrapping of the copolymer around the MWCNTs provides a high density of evenly distributed defects on the surface after the pyrolysis treatment,facilitating the uniform distribution of ultrafine Pt and PtCu ***,the Pt_(1)Cu_(2)/SN‐MWCNTs show an obviously larger electroactive surface area and higher mass activity,stability,and CO poisoning resistance in methanol oxidation compared to Pt/SN‐MWCNTs,Pt/S‐MWCNTs,Pt/N‐MWCNTs,and commercial Pt/*** functional theory studies confirm that the co‐doping of S and N considerably deforms the CNTs and polarizes the adjacent C ***,both the adsorption of Pt1Cu2 onto the SN‐MWCNTs and the subsequent adsorption of methanol are enhanced;in addition,the catalytic activity of Pt_(1)Cu_(2)/SN‐MWCNTs for methanol oxidation is thermodynamically and kinetically more favorable than that of its CNT and N‐CNT *** work provides a novel method to fabricate high‐performance fuel cell electrocatalysts with highly dispersed and stable Pt‐based nanoparticles on a carbon substrate.

关键词： Methanol oxidation Conductive copolymers Dual‐doped carbon nanotubes Pt‐based nanoparticles DFT calculation

集成氧离子传输膜的CO+_2零排放固体氧化物燃料电池复合动力系统

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中国电机工程学报 2013年第20期33卷 8-16,5页

作者：段立强黄科薪潘翔杨勇平国家火力发电工程技术研究中心(华北电力大学) 北京市昌平区102206

为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗... 详细信息

为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗分布情况,分析了SOFC的主要参数对整个系统性能的影响,并与集成传统深冷空分系统的零CO2排放SOFC复合动力系统进行了比较研究。研究结果表明:与不回收CO2的传统SOFC复合动力系统相比,与OTM集成的复合动力系统效率下降仅2.16个百分点,比与传统深冷空分系统集成的复合动力系统效率高0.74个百分点。该文研究成果可以为研究更高效的零排放复合动力系统提供有益的参考。

关键词：固体氧化物燃料电池堆复合动力系统回注氧离子传输膜 CO2零排放

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航空研制企业持续发展方法研究

科学学与科学技术管理 2006年第8期27卷 121-124页

作者：黄柯鑫欧立雄方炜西北工业大学管理学院陕西西安710072

以航空研制企业为研究对象,结合我国航空企业研制特点和项目管理成熟度模型,提出了航空研制项目管理过程改进的一种方法,包括五项活动,对这些活动进行了详细阐述,目的是促进航空研制企业持续地进行航空研制项目管理过程的改进和保持企... 详细信息

以航空研制企业为研究对象,结合我国航空企业研制特点和项目管理成熟度模型,提出了航空研制项目管理过程改进的一种方法,包括五项活动,对这些活动进行了详细阐述,目的是促进航空研制企业持续地进行航空研制项目管理过程的改进和保持企业持续发展。

关键词：航空研制企业项目管理成熟度过程改进活动