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Rhodium-Catalyzed Transannulation of 1,2,3-Thiazoles with Alkynes for the Direct Synthesis of Thiochromenones

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Chinese Journal of Chemistry 2023年第5期41卷 509-513页

作者： Jun Pan ziyao zhang Lili Chen Ning Jiao State Key Laboratory of Natural and Biomimetic Drugs Chemical Biology CenterSchoolof Pharmaceutical SciencesPeking University XueYuanRd.38Beijing 100191China Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal UniversityShanghai 200062China

A rhodium-catalyzed denitrogenative carbonylation of 1,2,3-thiadiazole with alkynes to construct(benzo)thiochromenones is *** terminal and internal alkynes were compatible in this[3+2+1]cycloaddition,affording a broad... 详细信息

关键词： Rh-catalysis Transannulation Thiadiazoles Alkynes Thiochromenones

Directional Preimage Entropy for ■-Actions

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Journal of Mathematical Research with Applications 2020年第1期40卷 33-46页

作者： Ya-nan GAO ziyao zhang Faculty of International Language Education Hebei Foreign Studies University College of Mathematics and Computer Science Hanjiang Normal University

In this paper, a new type of entropy, directional preimage entropy including topological and measure theoretic versions for ■-actions, is introduced. Some of their properties including relationships and the invariance are obtained. Moreover, several systems including ■-actions generated by the expanding maps, ■-actions defined on finite graphs and some infinite graphs with zero directional preimage branch entropy are studied.

关键词： ■-actions directional preimage entropy infinite graph

Multifunctional inorganic nanomaterials for cancer photoimmunotherapy

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Cancer Communications 2022年第2期42卷 141-163页

作者： Lu Tang Aining zhang ziyao zhang Qingqing Zhao Jing Li Yijun Mei Yue Yin Wei Wang State Key Laboratory of Natural Medicines Department of PharmaceuticsSchool of PharmacyChina Pharmaceutical UniversityNanjingJiangsuP.R.China National Medical Products Administration Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients China Pharmaceutical UniversityNanjingJiangsuP.R.China

Phototherapy and immunotherapy in combination is regarded as the ideal ther-apeutic modality to treat both primary and metastatic ***-apy uses different immunological approaches to stimulate the immune system to identify tumor cells for targeted *** destroys the pri-mary tumors by light irradiation,which induces a series of immune responses through triggering immunogenic cancer cell ***,when integrat-ing immunotherapy with phototherapy,a novel anti-cancer strategy called pho-toimmunotherapy(PIT)is *** synergistic treatment modality can not only enhance the effectiveness of both therapies but also overcome their inherent limitations,opening a new era for the current anti-cancer ***,the advancement of nanomaterials affords a platform for *** all these nanomaterials,inorganic nanomaterials stand out as idealmediators in PIT due to their unique physiochemical *** nanomaterials can not only serve as carriers to transport immunomodulatory agents in immunotherapy owing to their excellent drug-loading capacity but also function as photother-mal agents or photosensitizers in phototherapy because of their great optical *** this review,the recent advances of multifunctional inorganic nanomaterial-mediated drug delivery and their contributions to cancer PIT will be highlighted.

关键词： biodegradability cancer photoimmunotherapy immune stimulation inorganic nanomaterial nanoparticles targeted drug delivery

Progress in efficient doping of Al-rich AlGaN

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Journal of Semiconductors 2024年第2期45卷 10-20页

作者： Jiaming Wang Fujun Xu Lisheng zhang Jing Lang Xuzhou Fang ziyao zhang Xueqi Guo Chen Ji Chengzhi Ji Fuyun Tan Xuelin Yang Xiangning Kang Zhixin Qin Ning Tang Xinqiang Wang Weikun Ge Bo Shen State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Beijing SinoGaN Semiconductor Technology Co. Ltd.Beijing 101399China Nano-optoelectronics Frontier Center of Ministry of Education Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China

The development of semiconductors is always accompanied by the progress in controllable doping *** AlGaN-based ultraviolet(UV)emitters as an example,despite a peak wall-plug efficiency of 15.3%at the wavelength of 275 nm,there is still a huge gap in comparison with GaN-based visible light-emitting diodes(LEDs),mainly attributed to the inefficient doping of AlGaN with increase of the Al ***,p-doping of Al-rich AlGaN is a long-standing challenge and the low hole concentration seriously restricts the carrier injection *** p-GaN cladding layers are widely adopted as a compromise,the high injection barrier of holes as well as the inevitable loss of light extraction cannot be *** in terms of n-doping the main issue is the degradation of the electrical property when the Al composition exceeds 80%,resulting in a low electrical efficiency in sub-250 nm *** review summarizes the recent advances and outlines the major challenges in the efficient doping of Al-rich AlGaN,meanwhile the corresponding approaches pursued to overcome the doping issues are discussed in detail.

关键词： AlGaN-based UV-LEDs Al-rich AlGaN doping

解构重组:从头构建羟基取代苯并呋喃的新策略

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有机化学 2020年第6期40卷 1790-1791页

作者：张梓曜焦宁北京大学天然药物及仿生药物国家重点实验室北京100191

羟基取代苯并呋喃是一种广泛存在于天然产物和生物活性分子中的结构.目前,官能团化苯并呋喃的合成通常使用两种策略:(1)过渡金属催化的sp^2碳氢键官能团化;(2)通过环化反应构建苯环或呋喃环.这两种策略都存在一定的局限性.碳氢键官能团... 详细信息

羟基取代苯并呋喃是一种广泛存在于天然产物和生物活性分子中的结构.目前,官能团化苯并呋喃的合成通常使用两种策略:(1)过渡金属催化的sp^2碳氢键官能团化;(2)通过环化反应构建苯环或呋喃环.这两种策略都存在一定的局限性.碳氢键官能团化是一种强大的策略,近年来发展出多种导向基协助的吲哚4~7位的碳氢键官能团化反应^[1].

关键词：苯并呋喃碳氢键官能团化呋喃环过渡金属催化天然产物生物活性分子环化反应两种策略

The quality traceability system for prefabricated buildings using blockchain:An integrated framework

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Frontiers of Engineering Management 2020年第4期7卷 528-546页

作者： ziyao zhang Zhenmin YUAN Guodong NI Han LIN Yujie LU Institute of Project Management School of Mechanics and Civil EngineeringChina University of Mining and TechnologyXuzhou 221116China School of Information Engineering Jiangsu Key Laboratory of Auditing Information EngineeringNanjing Audit UniversityNanjing 211815China Department of Building Engineering College of Civil EngineeringKey Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of EducationShanghai Institute of Intelligent Science and TechnologyTongji UniversityShanghai 200092China

The quality traceability of precast components has largely affected the widespread adoption of prefabricated *** technology provides an effective solution to change the centralized storage mode of traditional traceability system and its related *** this paper,we propose a framework of quality traceability system for precast components based on blockchain *** system framework adopts a hybrid blockchain architecture and dual storage mode,defines three types of smart contracts,and creates an interactive and efficient source tracing query method,which could effectively achieve the goals of decentralization,openness,and non-tamperability,as well as efficient traceability.

关键词： quality traceability precast components blockchain framework

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事件研究法的实现、问题和拓展

数量经济技术经济研究 2023年第9期40卷 71-92页

作者：张子尧黄炜中南财经政法大学财政税务学院、收入分配与现代财政学科创新引智基地北京大学国家发展研究院

事件研究法是一种广泛应用于社会科学各领域的因果推断和政策评估工具。近年来事件研究法通常与双重差分法搭配使用,用于检验平行趋势假设和政策动态因果效应。本文结合前沿理论计量研究成果,试图对事件研究法进行系统性的归纳梳理,以... 详细信息

事件研究法是一种广泛应用于社会科学各领域的因果推断和政策评估工具。近年来事件研究法通常与双重差分法搭配使用,用于检验平行趋势假设和政策动态因果效应。本文结合前沿理论计量研究成果,试图对事件研究法进行系统性的归纳梳理,以厘清事件研究法在实践中需要注意的一些问题。本文梳理了事件研究法的历史发展脉络,详细展示事件研究法的实现方式、识别假设以及其与双重差分法之间的紧密联系。本文归纳分析了事件研究法实践中可能会面临的一些常见问题,包括基期选择、平行趋势检验、数据归并和截断、控制组间时间趋势差异等问题的影响和应对方法。本文还详细分析了异质性处理效应情形下的事件研究法估计偏误来源、修正思路、平行趋势检验等问题。

关键词：事件研究法动态双重差分法双向固定效应模型异质性处理效应

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机械蒸汽再压缩蒸发结晶系统优化设计

西安交通大学学报 2020年第4期54卷 101-109页

作者：张子尧姜华宫武旗西安科技大学能源学院西安710054 西安交通大学能源与动力工程学院西安710049

为使机械蒸汽再压缩(MVR)并联双效蒸发结晶系统在满足生产要求的同时性能达到最优,提出基于强度Pareto进化算法2(SPEA2)的系统优化设计方法,进一步挖掘系统的节能潜力。对于既定的系统工艺流程,通过分析操作变量对系统性能的影响规律,... 详细信息

为使机械蒸汽再压缩(MVR)并联双效蒸发结晶系统在满足生产要求的同时性能达到最优,提出基于强度Pareto进化算法2(SPEA2)的系统优化设计方法,进一步挖掘系统的节能潜力。对于既定的系统工艺流程,通过分析操作变量对系统性能的影响规律,建立了优化问题的数学模型,并加以质量和能量平衡的约束条件;以系统总功耗最低和总换热面积最小为优化目标,利用SPEA2多目标进化算法对操作变量取值进行寻优计算,在模糊集合理论支撑下得到蒸发温度和压缩温升的最优组合解。结果表明:在相同设计任务条件下,系统总功耗降低了22.1 kW,总换热面积减少了31.2 m^2,效能系数值提高7.94%,效率提升5.91%,损失减小38.4 kW,说明采用基于SPEA2算法的优化设计方法,能够提高机械蒸汽再压缩并联双效蒸发结晶系统的能量利用率及热力学完善程度。

关键词：机械蒸汽再压缩性能分析 SPEA2算法多目标优化 Pareto最优解

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MVR并联双效蒸发结晶系统设计及研究

化工进展 2019年第10期38卷 4461-4469页

作者：姜华张子尧宫武旗西安科技大学能源学院陕西西安710054 西安交通大学能源与动力工程学院陕西西安710049

利用蒸发法处理工业废水,能够实现废水的资源化利用。本文针对不同类型蒸发器适用范围受限问题,将降膜式蒸发器与强制循环蒸发器联用,提出了机械蒸汽再压缩(MVR)并联双效蒸发结晶系统。首先设计了系统的工艺循环流程并建立数学模型,对... 详细信息

利用蒸发法处理工业废水,能够实现废水的资源化利用。本文针对不同类型蒸发器适用范围受限问题,将降膜式蒸发器与强制循环蒸发器联用,提出了机械蒸汽再压缩(MVR)并联双效蒸发结晶系统。首先设计了系统的工艺循环流程并建立数学模型,对该系统及其设备进行质量和能量衡算,并对模型的可行性进行核算。随后建立系统性能的?分析模型,对常压下质量分数为5%的硫酸钠溶液蒸发结晶进行实例计算,并将其与传统三效蒸发结晶系统进行比较。通过综合能量分析与?分析,MVR并联双效蒸发结晶系统的节能程度更大,其效能系数(COP)值为21.4,相同工况下高于传统三效蒸发结晶系统82.2%,而单位能耗仅为传统三效蒸发结晶系统的17.6%;其?效率高于传统三效蒸发结晶系统51.5%,?损失则低于传统三效蒸发结晶系统24.7%,这表明MVR并联双效蒸发结晶系统热力学完善程度更高,在节能方面有较大的推广应用潜力。

关键词：废水机械蒸汽再压缩双效蒸发结晶平衡性能分析