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西北师范大学学报（自然科学版） 2024年第5期60卷 125-128页

作者：李亚利钟佐琴何满意云南民族大学数学与计算机科学学院云南昆明650500

有限群不可约特征标核的性质对群结构有重要的影响.刻画了非线性非忠实不可约特征标个数至多为2的有限幂零群的结构.

关键词： p-群幂零群非线性非忠实不可约特征标特征标核

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明代重修灵渠考论

贵州文史丛刊 2024年第3期 42-51页

作者：左菲悦云南大学历史与档案学院云南昆明650000

灵渠修建于秦代,在沟通湘江和珠江两大水系中发挥着重要作用,历代对其均有维护与整修。明代对灵渠的修浚主要有六次,由于史料采用不全或引述有异,一些研究结论尚存不足。考万历《广西通志》之《兴安县重修陡河记》发现,万历十五年(1587... 详细信息

灵渠修建于秦代,在沟通湘江和珠江两大水系中发挥着重要作用,历代对其均有维护与整修。明代对灵渠的修浚主要有六次,由于史料采用不全或引述有异,一些研究结论尚存不足。考万历《广西通志》之《兴安县重修陡河记》发现,万历十五年(1587)广西巡按御史蔡系周虽有修渠之议,但未实际动工;至万历三十年(1602),灵渠才得以重修。厘清万历年间灵渠修浚的确切时间,有助于了解明代修渠的真实情况,以及当时的水利工程与区域治理之间的关系。

关键词：明代灵渠水利修浚

A Fast and Room-temperature Self-healing Thermal Conductive Polymer Composite

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Chinese Journal of Polymer Science 2021年第10期39卷 1328-1336,I0008页

作者： De-Wei Yue Hong-qin wa.g Han-qing Tao Peng Zheng Cheng-Hui Li Jing-Lin zuo State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNational Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Thermal conducting materials may be damaged during long-term use,resulting in the increase of thermal resistance and therefore inefficient heat *** introduction of self-healing ability may solve this problem,but the realization of fast and room-temperature self-healing in thermal conducting composites is quite ***,we choose a flexible poly(dimethylsiloxane)polymer material(PDMS-COOH)as the matrix and graphene nanosheets as the thermal conductive filler to prepare a new kind of thermal conductive polymer composite(PDMS-COOH-Cg)that can quickly self-heal at room *** thermal conductivity of PDMS-COOH-Cg10 with 10%of graphene content is 0.48 W·m^(-1)·K^(-1),which is 16 times that of PDMS-COOH(0.03 W·m^(-1)·K^(-1)).At room temperature,self-healing efficiency of PDMS-COOH-Cg10 based on tensile strength can be 53.8%for 30 s and 84.6%for 24 *** infrared thermal imaging dipicted that after 2 min of self-healing at room temperature,the thermal conduction temperature near the damage was basically restored to the level of the pristine sample.

关键词： Self-healing Thermal conductive Infrared thermal imaging

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光纤传感测量软体排变形应变传递效率研究

中国农村水利水电 2024年第8期 188-193页

作者：魏祥龙徐伟左利钦杨涵苑王茂枚袁赛瑜高杰河海大学水灾害防御全国重点实验室江苏南京210024 南京水利科学研究院水灾害防御全国重点实验室江苏南京210029 长江航道局湖北武汉430010 江苏省水利科学研究院江苏南京210017

软体排与传感光纤之间的应变传递效率是应用光纤传感技术监测软体排变形的关键。本文旨在探讨软体排变形时,排体与传感光纤之间的应变传递效率及其对测量准确性的影响。通过理论分析与试验研究表明,在线性拉伸条件下,应变能够高效地从... 详细信息

软体排与传感光纤之间的应变传递效率是应用光纤传感技术监测软体排变形的关键。本文旨在探讨软体排变形时,排体与传感光纤之间的应变传递效率及其对测量准确性的影响。通过理论分析与试验研究表明,在线性拉伸条件下,应变能够高效地从排体传递至光纤,低传递效率线以下的区域主要位于传感光纤的边缘;而在弯曲变形条件下,变形测量误差与相对定点间距R呈线性相关,R=1.2时测量平均误差在-4%以内,而R=2.4~4.8时测量误差范围在-15%~-30%之间。研究成果可为河工模型试验测量技术以及光纤传感监测排体变形的现场应用提供参考。

关键词：软体排应变传递变形测量光纤传感

An improved four-dimensional variation source term inversion model with observation error regularization

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Defence Technology（防务技术） 2023年第6期24卷 349-360页

作者： Chao-shuai Han Xue-zheng Zhu Jin gu guo-hui Yan Xiao-hui gao qin-wen zuo Institute of NBC Defence BeijingChina State Key Laboratory of NBC Protection for Civilian BeijingChina

Aiming at the Four-Dimensional Variation source term inversion algorithm proposed earlier,the observation error regularization factor is introduced to improve the prediction accuracy of the diffusion model,and an improved Four-Dimensional Variation source term inversion algorithm with observation error regularization(OER-4DVAR STI model)is ***,by constructing the inversion process and basic model of OER-4DVAR STI model,its basic principle and logical structure are ***,the observation error regularization factor estimation method based on Bayesian optimization is proposed,and the error factor is separated and optimized by two parameters:error statistical time and deviation ***,the scientific,feasible and advanced nature of the OER-4DVAR STI model are verified by numerical simulation and tracer test *** experimental results show that OER-4DVAR STI model can better reverse calculate the hazard source term information under the conditions of high atmospheric stability and flat underlying *** with the previous inversion algorithm,the source intensity estimation accuracy of OER-4DVAR STI model is improved by about 46.97%,and the source location estimation accuracy is improved by about 26.72%.

关键词： Source term inversion Four dimensional variation Observation error regularization factor Bayesian optimization SF6 tracer test

云南景谷县农村傣族老年人尼古丁依赖现状及与抑郁的关系研究

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现代预防医学 2024年第5期51卷 854-858页

作者：李芹李国晖刘岚刘杜丽余孜孜左梅黄友蔡乐国家卫健委毒品依赖和戒治重点实验室昆明医科大学公共卫生学院

目的分析云南景谷县农村傣族老年人尼古丁依赖现状及与抑郁的关系。方法采用多阶段分层随机抽样方法抽取云南景谷县1 409名60岁及以上农村傣族老年人进行面访问卷调查。结果云南景谷县农村傣族老年人的现在吸烟率为18.6%，其中男性为... 详细信息

目的分析云南景谷县农村傣族老年人尼古丁依赖现状及与抑郁的关系。方法采用多阶段分层随机抽样方法抽取云南景谷县1 409名60岁及以上农村傣族老年人进行面访问卷调查。结果云南景谷县农村傣族老年人的现在吸烟率为18.6%，其中男性为37.1%、女性为0.8%，男性的吸烟率明显高于女性(χ2=305.947,P0.05)、年龄组(χ2=1.433,P>0.05)、文化程度(χ2=2.054,P>0.05)、家庭年人均收入(χ2=0.654,P>0.05)的傣族老年人的尼古丁依赖率差异均无统计学意义。调查人群抑郁的患病率为52.0%，其中男性患病率为49.4%、女性为54.5%。多因素logistic回归模型分析结果显示，尼古丁依赖者比非尼古丁依赖者更容易患抑郁(OR=1.517,95%CI:1.066～2.158)。结论云南省傣族老年人尼古丁依赖与抑郁的发生呈正相关。采取有效措施降低吸烟人群的尼古丁依赖率，有助于提高老年人的心理健康水平。

关键词：傣族尼古丁依赖抑郁农村老年人

Amyloid beta-peptide worsens cognitive impairment following cerebral ischemia-reperfusion injury

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Neural Regeneration Research 2013年第26期8卷 2449-2457页

作者： Bo Song Qiang Ao Ying Niu qin Shen Huancong zuo Xiufang Zhang Yandao gong Research Center of Stem Cells and Regenerative Medicine School of Medicine Tsinghua University State Key Laboratory of Biomembrane and Membrane Biotechnology School of Life Sciences Tsinghua University Institute of Neurology Disorders Yuquan Hospital Tsinghua University

Amyloid 13-peptide, a major component of senile plaques in Alzheimer＇s disease, has been implicated in neuronal cell death and cognitive impairment. Recently, studies have shown that the pathogenesis of cerebral ischemia is closely linked with Alzheimer＇s disease. In this study, a rat model of global cerebral ischemia-reperfusion injury was established via occlusion of four arteries; meanwhile, fibrillar amyloid [3-peptide was injected into the rat lateral ventricle. The Morris water maze test and histological staining revealed that administration of amyloid 13-peptide could further aggravate impairments to learning and memory and neuronal cell death in the hippocampus of rats subjected to cerebral ischemia-reperfusion injury. Western blot showed that phosphorylation of tau protein and the activity of glycogen synthase kinase 313 were significantly stronger in cerebral ischemia-reperfusion injury rats subjected to amyloid [3-peptide administration than those undergo- ing cerebral ischemia-repetfusion or amyloid 13-peptide administration alone. Conversely, the activ- ity of protein phosphatase 2A was remarkably reduced in rats with cerebral ischemia-reperfusion injury following amyloid 13-peptide administration. These findings suggest that amyloid 13-peptide can potentiate tau phosphorylation induced by cerebral ischemia-reperfusion and thereby aggravate cognitive impairment.

关键词： neural regeneration brain injury cerebral ischemia-reperfusion Alzheimer's disease amyloid 13-peptides tau proteins glycogen synthase kinase 313 protein phosphatase 2A phosphorylation grants-supported paper neuroregeneration

Responses of river bed evolution to flow-sediment process changes after Three gorges Project in middle Yangtze River:A case study of Yaojian reach

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water Science and Engineering 2020年第2期13卷 124-135页

作者： Li-qin zuo Yong-jun Lu Huai-xiang Liu Fang-fang Ren Yuan-yuan Sun State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Middle Changjiang River Survey Bureau of Hydrology and water Resources Wuhan 430010China

The Three gorges Project(TgP)has changed the flow-sediment process in the middle Yangtze *** navigation purposes,there is an urgent need to study the changes of the river regime over a long-term period and the shoal-channel evolution over different seasons since the completion of the *** on analysis of the measured data and the results of a two-dimensional mathematical model,the changes of the river regime and river bed evolution in the Yaojian reach downstream of the TgP were *** show that a high sediment transport flux helps to keep the main flow in the North Branch,while a low sediment transport flux helps to keep the main flow in the South ***,the main branch will not change in the near future because of the low sediment transport *** this study,the flow-sediment process adjusted by the TgP was restored to the conditions before the TgP,and the river bed evolution under the adjusted and non-adjusted flow-sediment conditions was *** the completion of the TgP,the reservoir storage accelerated the flood recession process and decreased the erosion by 11.9%under the flow-sediment conditions in 2010,and the deposition in the flood season decreased by 56.4%.

关键词： River regime River bed evolution Flow-sediment process Three gorges Project Yaojian reach Middle Yangtze River Navigation channel

A 2.16 eV bandgap polymer donor gives 16%power conversion efficiency

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Science Bulletin 2020年第3期65卷 179-181页

作者： Tan wa.g Jianqiang qin zuo Xiao Xianyi Meng Chuantian zuo Bin Yang Hairen Tan Junliang Yang Shangfeng Yang Kuan Sun Suyuan Xie Liming Ding Department of Chemistry Xiamen UniversityXiamen 361005China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems School of Energy and Power EngineeringChongqing UniversityChongqing 400044China CSIRO Manufacturing Bag 10Clayton SouthVictoria 3169Australia College of Materials Science and Engineering Hunan UniversityChangsha 410082China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093China School of Physics and Electronics Central South UniversityChangsha 410083China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Nowadays,wide-bandgap(WBg)copolymers attract great attention in the field of organic photovoltaics[1].They are ideal electron-donating partners for low-bandgap small molecule acceptors[2-12].With good energy levels matching,the blend of WBg copolymer donor and small molecule acceptor can harvest most of the sunlight and deliver high power conversion efficiencies(PCEs)in solar *** higher than 16%have been achieved[13-15].WBg copolymers especially those with ultra-wide bandgaps(i.e.,optical bandgap(Eg opt)>2.07 eV,absorption onsetg copolymer donors are less efficient,generally giving PCEs below 13%[18].Designing highly efficient ultra-WBg copolymers is *** this work,we use fluorine-and alkoxyl-substituted benzene(FAB)as the building block to construct ultra-WBg copolymer donors.

关键词： ORgANIC SOLAR-CELLS COPOLYMERS

Transition Dipole, Charge Transfer, and Electron-hole Coherence in Two-photon Absorption： Visualizations with Two Dimensional Site and Three Dimensional Cube Representations

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Chinese Journal of Chemical Physics 2009年第5期22卷 529-534,I0002页

作者： Yuan-zuo Li Wen-qin Zhang Xiao-hong Zhao Feng-cai Ma Mao-du Chen School of Physics and Optoelectronic Technology and College of Advanced Science and Technology Dalian University of Technology Dalian 116024 China Department of Physics Liaoning University Shenyang 110036 China

The developed visualization methods of two dimensional （2D） site and three dimensional （3D） cube representations have been performed to show the orientation of transition dipole, charge transfer, and electron-hole coherence in two-photon absorption （TPA）. The 3D cube representations of transition density can reveal visually the orientation and strength of transition dipole moment, and charge different density show the orientation of charge transfer in TPA. The 2D site representation can reveal visually the electron-hole coherence in TPA. The combination of 2D site and 3D cube representations provide clearly inspect into the charge transfer process and the contribution of excited molecular segments for TPA.

关键词： 2D site and 3D cube representations Charge transfer Transition dipole,Two-photon absorption