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Internal electric field modulation by copper vacancy concentration of cuprous sulfide nanosheets for enhanced selective CO_(2) photoreduction

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Journal of Energy Chemistry 2024年第4期91卷 324-330页

作者： xian shi Weidong Dai Xiaoqian Li Yang Bai Qin Ren Yao Lei Xing'an Dong School of Chemistry and Environmental Engineering Sichuan University of Science&EngineeringZigong 643000SichuanChina State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation School of Oil&Natural Gas EngineeringSouthwest Petroleum UniversityChengdu 610500SichuanChina Chongqing Key Laboratory of Photo-Electric Functional Materials College of Physics and Electronic EngineeringChongqing Normal UniversityChongqing 401331SichuanChina Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731SichuanChina

Although the internal electric field(IEF)of photocatalysts is acknowledged as a potent driving force for photocharge separation,modulating the IEF intensity to achieve enhanced photocatalytic performances remains a ***,cuprous sulfide nanosheets with different Cu vacancy concentration were employed to study IEF modulation and corresponding direct charge *** the samples,Cu_(1.8)S nanosheets possessed intensified IEF intensity compared with those of Cu_(2)S and Cu_(1.95)S nanosheets,suggesting that an enhanced IEF intensity could be achieved by introducing more Cu *** intensified IEF of Cu_(1.8)S nanosheets induced numerous photogenerated electrons to migrate to its surface,and the dissociative electrons were then captured by Cu vacancies,resulting in efficient charge separation *** addition,the Cu vacancies on Cu_(1.8)S nanosheets accumulated electrons as active sites to lower the energy barrier of rate-determining step of CO_(2)photoreduction,leading to the selective conversion of CO_(2)to ***,the manipulation of IEF intensity through Cu vacancy concentration regulation of cuprous sulfide photocatalysts for efficient charge separation has been discussed,providing a scientific strategy to rationally improve photocata lytic performances for solar energy conversion.

关键词： Internal electric field intensity Cuprous sulfide photocatalysts Cu vacancies Charge separation Selective CO_(2) photoreduction

Engineering high-performance dielectric chiral shells with enhanced chiral fields for sensitive chiral biosensor

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Rare Metals 2024年第3期43卷 1197-1206页

作者： Yi-Fan Wang Shan-Shan Huang Zhen-Dong Dai shi-Lin xian Xuan-Nan Wu Fu-Hua Gao Yi-Dong Hou College of Physics Sichuan UniversityChengdu610065China Graduate School of Sichuan University Sichuan UniversityChengdu610065China

Chiral metamaterials have been a topic of significant research interest in recent years due to their potential for various applications in nanophotonic devices and chiral ***,the intrinsic Ohmic loss in surface plasmonic resonance has limited their practical use,resulting in large light dissipation and weak chiroptical ***,we report on the development of high-performance dielectric chiral shells(DCS)through a two-step Si deposition process on a self-assembled microsphere *** form DCS sample completely oyercomes the cancelation effect originated from the disorder property of the micro-sphere monolayer in macroscale,and at a wavelength of approximately 710 nm,the measured optimal chiral signal(g-factor)and transmittance can reach up to 0.7 and 0.3,*** strong chiroptical effect comes from the asymmetric circular displacement currents(i.e.,magnetic modes)enabled by the specific shell *** chiral shell geometry,electromagnetic properties,sensor sensitivity of chiral molecules and figure of merit are systematically *** DCSs demonstrate highly sensitive detection of chiral biomolecules owing to their easily accessible geometry and enhanced uniform chiral field.

关键词： Dielectric chiral shells(DCS) Si deposition Magnetic resonance Highly sensitive sensor Chiral field

Postoperative abdominal herpes zoster complicated by intestinal obstruction:A case report

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World Journal of Clinical Cases 2024年第6期12卷 1138-1143页

作者： Zhen-Yu Dong Rui-xian shi Xiao-Biao Song Ming-Yue Du Ji-Jun Wang Department of General Surgery Baotou Central HospitalBaotou 014040Inner Mongolia Autonomous RegionChina Department of General Surgery Baotou Medical CollegeBaotou 014040Inner Mongolia Autonomous RegionChina Department of Neurology Baotou Central HospitalBaotou 014040Inner Mongolia Autonomous RegionChina Department of Neurology Inner Mongolia Medical UniversityHohhot 010110Inner Mongolia Autonomous RegionChina

BACKGROUND Intestinal obstruction is a common occurrence in clinical ***,the occurrence of herpes zoster complicated by intestinal obstruction after abdominal surgery is exceedingly *** the diagnostic and treatment process,clinicians consider it crucial to identify the primary causes of its occurrence to ensure effective treatment and avoiding *** SUMMARY Herein,we present the case of a 40-year-old female patient with intestinal obstruction who underwent laparoscopic appendectomy and developed herpes zoster after *** the patient's clinical manifestations and relevant laboratory tests,it was suggested that the varicella zoster virus reactivated during the latent period after abdominal surgery,causing herpes ***,the herpes virus invaded the visceral nerve fibers,causing gastrointestinal dysfunction and loss of intestinal peristalsis,which eventually led to intestinal *** patient was successfully treated through conservative treatment and antiviral therapy and subsequently discharged from the *** Pseudo-intestinal obstruction secondary to herpes zoster infection is difficult to distinguish from mechanical intestinal obstruction owing to various *** cases of inexplicable intestinal obstructions,considering the possibility of a viral infection is essential to minimize misdiagnosis and missed diagnoses。

关键词： Herpes zoster Pseudo-intestinal obstruction Ogilvie syndrome Peripheral motor neuropathy Case report

Thermally-induced cracking behaviors of coal reservoirs subjected to cryogenic liquid nitrogen shock

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 2894-2908页

作者： Songcai Han Qi Gao Xinchuang Yan Lile Li Lei Wang xian shi Chuanliang Yan Daobing Wang College of Energy Chengdu University of TechnologyChengdu610059China School of Engineering The University of Western Australia35 Stirling HighwayPerthWA6009Australia School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617China

The benefits of using cryogenic liquid nitrogen shock to enhance coal permeability have been confirmed from experimental *** this paper,we develop a fully coupled thermo-elastic model in combination with the strain-based isotropic damage theory to uncover the cooling-dominated cracking behaviors through three typical cases,*** reservoirs containing a wellbore,a primary fracture,and a natural fracture network,*** progressive cracking processes,from thermal fracture initiation,propagation or cessation,deflection,bifurcation to multi-fracture interactions,can be well captured by the numerical *** is observed that two hierarchical levels of thermal fractures are formed,in which the number of shorter thermal fractures consistently exceeds that of the longer *** effects of coal properties related to thermal stress levels and thermal diffusivity on the fracture morphology are quantified by the fracture fractal dimension and the statistical fracture *** induced fracture morphology is most sensitive to changes in the elastic modulus and thermal expansion coefficient,both of which dominate the complexity of the fracture *** reservoir candidates with preferred thermal-mechanical properties are also recommended for improving the stimulation *** findings are that there exists a critical injection temperature and a critical in-situ stress difference,above which no thermal fractures would be *** natural fractures with higher density and preferred orientations are also essential for the formation of complex fracture *** obtained results can provide some theoretical support for cryogenic fracturing design in coal reservoirs.

关键词： Coal reservoirs Cryogenic shock Thermal cracking behaviors Fracture morphology

Stepwise colloidal lithography toward scalable and various planar chiral metamaterials

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Rare Metals 2024年第2期43卷 723-735页

作者： Xiu Yang Yong Liu Fei-Liang Chen Qian-Qi Lin Rohit Chikkaraddy Shan-Shan Huang shi-Lin xian Yi-Dong Hou Jing-Lei Du Liang-Ping Xia Chun-Lei Du School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China Zhuhai Multiscale Optoelectronics Technology Co. Ltd.Zhuhai915060China Hybrid Materials for Opto-Electronics Group Department of Molecules and MaterialsMESA+Institute for NanotechnologyMolecules Center and Center for Brain-Inspired Nano SystemsFaculty of Science and TechnologyUniversity of Twente7500 AEEnschedeThe Netherlands School of Physics and Astronomy University of BirminghamBirminghamB152TTUK College of Physics Sichuan UniversityChengdu610065China Key Laboratory of Micro Nano Optoelectronic Devices and Intelligent Perception Systems Yangtze Normal UniversityChongqing408100China

Chiral metamaterials(CMs)composed by artificial chiral resonators have attracted great attentions in the recent decades due to their strong chiroptical resonance and identifiable interaction with chiral materials,facilitating practical applications in chiral biosensing,chiral emission,and display ***,the complex geometry of CMs improves the fabrication difficulty and hinders their scalable fabrication for practical applications,especially in the visible and ultraviolet *** potential strategy is the colloidal lithography that enables parallel fabrication for scalable and various planar ***,we demonstrate a stepwise colloidal lithography technique that uses sequential deposition from multiple CMs and expand their variety and *** geometry and optical chirality of building blocks from single deposition are systematically investigated,and their combination enables a significant extension of the range of chiral patterns by multiple-step *** approach resulted in a myriad of complex designs with different characteristic sizes,compositions,and shapes,which are particularly beneficial for the development of nanophotonic *** addition,we designed a flexible chiral device based on PDMS,which exhibits a good CD value and excellent stability even after multiple inward and outward *** excellent compatibility to various substrates makes the planar CMs more flexible in practical applications in microfluidic biosensing.

关键词： Chiral metamaterials Colloidal lithography Nanophotonics Metasurfaces Plasmonics Nanofabrications Flexible devices

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生产力系统与新质生产力阐释

内蒙古社会科学 2024年第3期45卷 110-118页

作者：石先梅中共浙江省委党校(浙江行政学院)浙江省“八八战略”创新发展研究院浙江杭州311121

马克思对生产力、生产力三因素和生产力影响因素在概念上作了明确区分,并以系统方法来研究生产力的各个组成部分。诸多影响生产力系统的因素分为两类,一类是生产力三因素,另一类是影响生产力三因素种类与结构的因素。梳理马克思生产力... 详细信息

马克思对生产力、生产力三因素和生产力影响因素在概念上作了明确区分,并以系统方法来研究生产力的各个组成部分。诸多影响生产力系统的因素分为两类,一类是生产力三因素,另一类是影响生产力三因素种类与结构的因素。梳理马克思生产力三因素理论与七大生产要素分类有助于把握好各种生产力影响因素之间的逻辑联系,完整阐释七大生产要素在新质生产力系统中所发挥的作用。科技创新、先进制造、颠覆性技术、前沿性技术是新质生产力的基础科学系统与技术工艺系统。新能源、新材料、生产要素创新性配置、生产力三因素及其优化组合是新质生产力的生产要素系统,由战略性新兴产业与未来产业主导的现代化产业体系是新质生产力的产业组织系统。新质生产力系统是基础科学系统、技术工艺系统、生产要素系统、产业组织系统的有机统一和高度融合。

关键词：生产力三因素生产力系统新质生产力生产要素科技创新

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数字金融安全与治理的政治经济学分析

经济学家 2024年第8期 88-97页

作者：石先梅中国人民大学马克思主义学院

数字技术与金融业务的深度融合在创新金融活力的同时提高了数字金融治理难度。金融资本与数字资本基于总体性特征与寄生性特征相互渗透,引发两类金融风险。为了维护数字金融安全,需处理好数字金融安全与整体金融安全、数字金融安全与数... 详细信息

数字技术与金融业务的深度融合在创新金融活力的同时提高了数字金融治理难度。金融资本与数字资本基于总体性特征与寄生性特征相互渗透,引发两类金融风险。为了维护数字金融安全,需处理好数字金融安全与整体金融安全、数字金融安全与数字经济发展、国内金融安全与国际金融安全之间的关系,在完善数据保护法律法规、充分发展数字经济的基础上发挥数字金融对实体经济的赋能作用。对内需加快数字金融科技研发、加强数字金融治理、完善数字服务体系、建设数字金融强国,对外需参与跨境数据贸易规则与金融数据跨境流动规则制定、畅通金融数据跨境流动、提高国际数字金融竞争实力与话语权。

关键词：数字金融金融安全数字经济数据保护

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榫卯:一种可组合的定制化内存分配框架

软件学报 2024年第4期35卷 2076-2098页

作者：欧阳湘臻朱怡安史先琛西北工业大学计算机学院陕西西安710072

动态内存分配器是现代应用程序重要组成部分,它负责管理空闲内存并处理用户内存请求.现代通用动态内存分配器能够提供较为平衡的性能与内存利用率,但考虑到不同应用场景的内存使用情况和优化目标不同,使用通用内存分配器并非最优解.针... 详细信息

动态内存分配器是现代应用程序重要组成部分,它负责管理空闲内存并处理用户内存请求.现代通用动态内存分配器能够提供较为平衡的性能与内存利用率,但考虑到不同应用场景的内存使用情况和优化目标不同,使用通用内存分配器并非最优解.针对应用场景定制的专用内存分配器通常能够更好地满足系统需要,然而编写专用内存分配器较为费时,也容易出错.开发者通常使用内存分配框架搭建专用动态内存分配器.然而,现有的内存分配框架存在抽象能力较差,组合性与定制性不足的问题.为此,从函数式编程视角审视动态内存分配过程,基于函数可组合性提出了一种可组合的定制化动态内存分配器框架榫卯.榫卯框架将系统内存分配抽象为多个互不耦合的内存分配层级函数的组合,这些层级函数能够扩展出策略槽,以提供更高的定制性和组合性.榫卯框架基于标准C实现,依赖C预处理器的元编程特性实现层级函数组合的零性能开销.开发者能够通过组合与定制分配器的层级函数,快速构建出适合应用场景的内存分配器.为了证明榫卯框架的有效性,使用榫卯框架构建了3种不同的内存分配器实例:tlsfcc,hslab与wfslab,其中tlsfcc针对多核嵌入式应用场景,通过替换同步策略优化并发吞吐率;hslab是核心感知的slab式分配器,通过定制线程缓存优化在异构硬件的性能;wfslab是低延迟的无等待/无锁分配器.为了评估这3种内存分配器实例,通过运行基准测试对比现有内存分配器.实验分别在8核x86/64平台和8核异构aarch64嵌入式平台进行.实验表明tlsfcc与原始tlsf分配器相比,在上述两个平台上分别取得了平均1.76和1.59的加速比;对比hslab与类似架构的tcmalloc,它在两个平台的平均执行时间仅为tcmalloc的69.6%和85.0%;wfslab则取得了参与实验对比的内存分配器中最小的最差情况内存请求延迟,其中包括目前最先进的无锁内存分配器mimalloc和snmalloc.

关键词：内存分配阻塞式同步异构系统操作系统函数式编程

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谈《台阶》中的情感描写

语文教学之友 2024年第4期43卷 29-31页

作者：郭时贤贵州省贵阳市观山湖区外国语实验中学

解读《台阶》这篇小说有多个视角,研究小说中的情感描写应当是文本解读的应有之义。基于情感线索,从追求高台阶过程中的情感、搭建高台阶过程中的情感、体验高台阶过程中的情感三个方面来解读本文,分析父亲这一角色特征,开辟一条新的文... 详细信息

解读《台阶》这篇小说有多个视角,研究小说中的情感描写应当是文本解读的应有之义。基于情感线索,从追求高台阶过程中的情感、搭建高台阶过程中的情感、体验高台阶过程中的情感三个方面来解读本文,分析父亲这一角色特征,开辟一条新的文本解读路径,并从中发现那些指向情感、激活内心的意义所在。

关键词：《台阶》情感描写父亲形象