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BN/SiBCN light-leakage-proof coatings of silica optical fiber for long term sensors at high temperatures

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Chinese Journal of Aeronautics 2021年第5期34卷 93-102页

作者： Xin’gang LUAN Xinming XU Rong YU qiqi zhang Sam zhang Laifei CHENG Science and Technology on Thermo Structural Composite Materials Laboratory Northwestern Poly technical UniversityXian 710072China Faculty of Materials and Energy Southwest UniversityChong Qing 400715China

SiBCN and BN/SiBCN light-leakage-proof coatings were prepared on silica optical fibers for sensing applications at high *** electron microscopy was used to characterize the surface morphology and microstructure of the coated *** and optical properties of the coated fiber were characterized by Raman,optical and tensile *** with the original fiber,the tensile strength of Si BCN and BN/Si BCN coated fiber show an increase of about 60%and 90%at room temperature,*** addition,the tensile strength of BN/Si BCN coated silica optical fiber was increased by about 42%at 700°*** has been found that the improvement of the strength of BN/Si BCN coated silica optical fiber is related to the healing of defects and residual compressive stress in *** the light transmittance performance of the coated fiber,it was found that BN/Si BCN double coating could be an ideal total reflection solution to protect silica optical fiber from light leakage during high temperature sensing operation.

关键词： BN/SiBCN double coating High temperature Optical fiber Sensor Silica

S-scheme regulated Ni_(2)P-NiS/twinned Mn_(0.5)Cd_(0.5)S hetero-homojunctions for efficient photocatalytic H_(2)evolution

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Journal of Materials Science & Technology 2024年第2期169卷 148-157页

作者： qiqi zhang Zhen Wang Yuhang Song Jun Fan Tao Sun Enzhou Liu School of Chemical Engineering/Xi’an Key Laboratory of Special Energy Materials Northwest UniversityXi’an 710069China

Effective bulk phase and surface charge separation is critical for charge utilization during the photo-catalytic energy conversion *** this work,the ternary Ni_(2)P-NiS/twinned Mn_(0.5)Cd_(0.5)S(T-MCS)nanohybrids were successfully constructed via combining Ni_(2)P-NiS with T-MCS solid solution for visible light photocatalytic H_(2)evolution.T-MCS is composed of zinc blende Mn_(0.5)Cd_(0.5)S(ZB-MCS)and wurtzite Mn_(0.5)Cd_(0.5)S(WZ-MCS)and those two alternatively arranged crystal phases endow T-MCS with excellent bulk phase charge separation performance for the slight energy level difference between ZB-MCS and WZ-MCS.S-scheme carriers transfer route between NiS and T-MCS can accelerate the interfacial charge separation and retain the active electrons and holes,meanwhile,co-catalyst Ni_(2)P as electron receiver and proton reduction center can further optimize the H_(2)evolution reaction kinetics based on the surface Schottky barrier *** above-formed homo-heterojunctions can establish multiple charge transfer channels in the bulk phase of T-MCS and interface of T-MCS and Ni_(2)*** the synergistic effect of twinned homojunction,S-scheme heterojunction,and Schottky barrier,the ternary Ni_(2)P-NiS/T-MCS com-posite manifested an H_(2)production rate of 122.5 mmol h^(-1)g^(-1),which was 1.33,1.24,and 2.58 times higher than those of the NiS/T-MCS(92.4 mmol h^(-1)g^(-1)),Ni_(2)P/T-MCS(98.4 mmol h^(-1)g^(-1)),and T-MCS(47.5 mmol h^(-1)g^(-1)),*** work demonstrates a promising strategy to develop efficient sul-fides photocatalyst toward targeted solar-driven H_(2)evolution through homo-heterojunction engineering.

关键词： Photocatalytic H_(2)evolution Twinned Mn_(0.5)Cd_(0.5)S Homojunction S-scheme heterojunction Schottky barrier

MoS2 yolk-shell microspheres with a hierarchical porous structure for efficient hydrogen evolution

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Nano Research 2016年第10期9卷 3038-3047页

作者： qiqi zhang Hua Bai Qing zhang Qiang Ma Yahui Li Chongqing wan Guangcheng Xi Department of Chemistry Capital Normal University No. 105 North Road West 3th Ring Road Beijing 100048 China Nanomaterials and Nanoproducts Research Center Chinese Academy of Inspection and Quarantine No. 11 Ronghua South Road Beijing 100176 China

Yolk-shell architectures have attracted extensive attention owing to their unique structure and infusive applications. MoS2 is regarded as one of the most promising catalytic materials for hydrogen evolution by the splitting of water. In this work, a simple self-template solvothermal approach is developed for the synthesis of novel MoS2 yolk-shell microspheres with a hierarchical porous structure by reacting MoO2 microspheres with L-cysteine. A dissolution- recrystallization formation mechanism is proposed for the MoS2 yolk-shell microspheres. Owing to structural superiority, the new material architecture exhibits improved photoelectrochemical properties, including efficient hydrogen evolution reaction catalytic activities, a high photocurrent density, a small overpotential, and a low charge-transfer resistance.

关键词： yolk-shell structure hydrogen molybdenum sulfide photoelectrochemical electrochemical

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落叶果树四季栽植技术

果树资源学报 2025年第2期6卷 63-65+69页

作者：刘富起张琪琪史洪超山东省德州市林业事业发展中心

在我国落叶果树栽植时，应根据当地的气候特点、林(园)地的灌溉条件、土壤墒情、建园准备情况等因素进行综合分析，选择最佳适宜的栽植时期。依据生产实际对落叶果树因地、因树、因条件四季适期栽植条件、栽植时间及栽植的技术措施进行... 详细信息

在我国落叶果树栽植时，应根据当地的气候特点、林(园)地的灌溉条件、土壤墒情、建园准备情况等因素进行综合分析，选择最佳适宜的栽植时期。依据生产实际对落叶果树因地、因树、因条件四季适期栽植条件、栽植时间及栽植的技术措施进行了简要概述，供果农参考。

关键词：果树栽植时期配套技术

Evolution Characteristics of Government-Industry-University Cooperative Innovation Network of Electronic Information Industry in Liaoning Province, China

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Chinese Geographical Science 2019年第3期29卷 528-540页

作者： PENG Fei zhang qiqi HAN Zenglin DING Yan FU Ningning Research Center for Marine Economy and Sustainable Development Liaoning Normal University College of Urban and Environmental Science Liaoning Normal University

It is important to optimize the cooperative innovation network for the improvement of economic competence and innovative power. Based on the patent information services platform, we obtain invention patent data for the electronic information industry in Liaoning from 1985 to 2015. This paper analyzes the cooperative innovation network structure, its spatiotemporal evolution and the triple helix relationship of government-industry-university(GIU) by using the social network analysis method and the triple helix theory as well as UCINet, ArcGIS and NetDraw. The empirical results show that: 1) the number of the subjects of the electronic information industry GIU cooperative innovation network in Liaoning demonstrates a gradual increase from 1985 to 2015, with the same trend in concentration. In terms of its subject and its centrality, the universities have a higher position, and the industries have a lower position,while the status of the government is still unclear. 2) The cooperative innovation network presents a core-periphery structure, and the polarization effect of innovation subjects tends to be obvious. There is certain distance-decay regularity in the cooperative innovation network, and a strong geographical proximity to cooperative innovation. 3) The compactness shows a downward trend as a whole. In terms of the extent of participation, the industries are better than the government but worse than the universities. This means that the cooperative innovation network of GIU in the electronic information industry in Liaoning is in the initial stage of formation.

关键词： government-industry-university (GIU) cooperative innovation network triple helix electronic information industry Liaoning Province

Identification of carbonates with high positive carbon isotope excursion from the Liaohe Group in the northeastern North China Craton and implications for the Lomagundi-Jatuli Event

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Science China Earth Sciences 2024年第9期67卷 2824-2844页

作者： Hongyu WANG Shuanhong zhang Sen WANG Linghao KONG Yue ZHAO qiqi zhang Sen GAO Guohui HU Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Natural ResourcesBeijing 100081China SinoProbe Laboratory Chinese Academy of Geological SciencesBeijing 100037China School of Earth Science and Mineral Resources China University of GeosciencesBeijing 100083China

The Great Oxidation Event(GOE)during the early Paleoproterozoic represents the first significant buildup in Earth’s atmospheric oxygen and resulted in a series of significant changes in the Earth’s surface *** them is the 2.22(or 2.33)–2.06 Ga Lomagundi-Jatuli Event(LJE),which is globally,the largest magnitude and longest duration,marine carbonate positive carbon isotope excursion(δ^(13)C_(V-PDB)>10‰)*** event has attracted the attention of scholars all over the ***,except for a high positive carbon isotope excursion(δ^(13)C_(V-PDB)>10‰)recently identified from marine carbonate rocks within the Daposhan Formation in the lower Fanhe Group(or the Sanchazi Group)in the Longgang Block in the northeast North China Craton(NCC),Paleoproterozoic carbonates in the NCC are characterized by a low-amplitude positive carbon isotope excursion(δ^(13)C_(V-PDB)10‰)of marine carbonate rocks occurred at about 2.15 *** co

关键词： Lomagundi-Jatuli Event(LJE) Great Oxidation Event(GOE) Carbon-oxygen isotopes Liaohe Group Marine carbonate Jiao-Liao-Ji Belt North China Craton

Autophagy and skin wound healing

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Burns & Trauma 2022年第1期10卷 757-767页

作者： Haiyue Ren Feng Zhao qiqi zhang Xing Huang Zhe Wang Department of Pathology Shengjing Hospital of China Medical University36 Sanhao StreetHeping DistrictShenyang City 110004Liaoning ProvinceChina Department of Stem Cells and Regenerative Medicine Shenyang Key Laboratory of Stem Cell and Regenerative MedicineChina Medical UniversityShenyang 110013LiaoningChina Department of General Surgery Shengjing Hospital of China Medical University36 Sanhao StreetHeping DistrictShenyang City 110004Liaoning ProvinceChina

Autophagy is a lysosome-dependent,self-renewal mechanism that can degrade and recycle cellular components in eukaryotic cells to maintain the stability of the intracellular environment and the cells ability to cope with unfavorable *** studies suggest that autophagy participates in regulating various cellular functions and is closely associated with the onset and progression of various *** healing is a complex,multistep biological process that involves multiple cell *** wounds,which include diabetic skin ulcers,can seriously endanger human *** studies have confirmed that autophagy plays an essential role in various phases of wound ***,in the inflammatory phase,autophagy has an anti-infection effect and it negatively regulates the inflammatory response,which prevents excessive inflammation from causing tissue *** the proliferative phase,local hypoxia in the wound can induce autophagy,which plays a role in anti-apoptosis and anti-oxidative stress and promotes cell *** of vascular endothelial cells promotes wound angiogenesis and that of keratinocytes promotes their differentiation,proliferation and migration,which is conducive to the completion of wound *** the remodeling phase,autophagy of fibroblasts affects the formation of hypertrophic ***,a refractory diabetic wound may be associated with increased levels of autophagy,and the regulation of mesenchymal stem cell autophagy may improve its application to wound ***,understanding the relationship between autophagy and skin wound healing and exploring the molecular mechanism of autophagy regulation may provide novel strategies for the clinical treatment of wound healing.

关键词： Autophagy Wound healing Diabetes Mesenchymal stem cells microRNA Skin

Synthesis of difluoromethylated benzylborons via rhodium(Ⅰ)-catalyzed fluorine-retainable hydroboration of gem-difluoroalkenes

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Chinese Chemical Letters 2021年第1期32卷 417-420页

作者： Yuanhong Cai Donghang Tan qiqi zhang Wenxin Lv Qingjiang Li Honggen Wang Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical SciencesSun Yat-sen University.Guangzhou 510006China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China

The synthesis of bo rylated orga nofluorines is of great interest due to their potential values as synthons in modular construction of fluorine-containing *** herein is a rhodium-catalyzed hydrobo ration of arylgem-difluoroalkenes leading to a series of α-difluoromethylated *** use of cationic rhodium catalyst and a biphosphine ligand with large bite angle was crucial for reactivity by offering good regioselectivity and diminishing the undesired β-F *** derivatizations of the products were conducted to showcase the utility of this protocol.

关键词： Rhodium Hydroboration Difluoromethy gem-Difluoroalkene β-F elimination

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采用智能进化算法的管壳式换热器详细设计

化工学报 2025年第1期76卷 241-255页

作者：李海东张奇琪杨路 AKRAM Naeem 常承林莫文龙申威峰重庆大学化学化工学院化工过程强化与反应国家地方联合工程实验室重庆401331 明哈吉大学拉合尔分校化工学院巴基斯坦旁遮普拉合尔54000 新疆大学化工学院省部共建碳基能源资源化学与利用国家重点实验室煤炭清洁转化与化工过程新疆维吾尔自治区重点实验室新疆乌鲁木齐830017 新疆宜化化工有限公司新疆准东煤高值多元化工程技术研究中心新疆昌吉831100

管壳式换热器是石油、化工等过程工业中应用最广泛的热量回收设备,其数学模型通常是十分复杂的非线性优化问题,现有的商业求解器和优化算法存在运算时间长、收敛困难、易陷入局部最优等难题。针对这些难题,参考管壳式换热器制造标准,将... 详细信息

管壳式换热器是石油、化工等过程工业中应用最广泛的热量回收设备,其数学模型通常是十分复杂的非线性优化问题,现有的商业求解器和优化算法存在运算时间长、收敛困难、易陷入局部最优等难题。针对这些难题,参考管壳式换热器制造标准,将换热器内构件尺寸定义成离散变量,分别以最小化换热面积、年度总费用、环境影响因子及最大化传热效率为目标函数,建立管壳式换热器详细设计的混合整数非线性规划模型。同时,对传统智能进化算法包括遗传算法、粒子群算法及模拟退火算法进行改进,使得换热器设计变量能够在一系列离散值中自由选择,不需要对优化结果进行人工圆整处理。案例测试结果表明,改进的智能进化算法能在1.0 s内得到最优设计方案,相对于全局求解器,优化时间节约99%以上,提高了优化求解效率;相对于局部求解器,改进的智能进化算法能够获取全局最优解,换热面积节约15.4%~56.6%,年度总费用节约15.8%~77.8%,保证设计质量。通过多目标优化在不同目标函数之间进行权衡,通过灵敏度分析展示了不同设计变量对目标函数的影响趋势。

关键词：传热管壳式换热器优化设计智能进化算法多目标优化