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煤矿机电设备修理与更新改造技术分析

煤炭技术 2009年第3期28卷 12-13页

作者：李月芬辽源矿业集团西安煤业公司吉林辽源136201

重点阐述了煤矿机电设备管理中设备修理的必要性,同时剖析了机电设备修理中的利与弊。阐明了机电设备的更新改造势在必行,从中可以看出机电设备的合理检修、适时改造的重要性。

关键词：机电设备修理更新改造

Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

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Journal of Energy Chemistry 2025年第1期100卷 578-604页

作者： Caixia li Wenwu liu Shiji Da lingbin Kong fen Ran State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon *** efficiency is not a core issue affecting the application of perovskite solar cells in special *** present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are ***, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and ***, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关键词： Halide perovskite solar cells Strain origins Strain effects Strain management

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吉林延边地区土壤钙元素生态地球化学

吉林大学学报（地球科学版） 2011年第1期41卷 215-221页

作者：王冬艳李月芬尚媛白荣杰徐倩吉林大学地球科学学院长春130061 山东省国土测绘院济南250013 吉林省地质调查院长春130061

在吉林延边地区系统的野外调查和土壤及苹果梨果实样品采集、测试的基础上,采用统计对比及相关分析方法研究了土壤钙元素全量、交换性钙及果实钙含量的空间差异,以及土壤-果实系统中钙元素的转化吸收特征及其对果实品质的影响,目的在于... 详细信息

在吉林延边地区系统的野外调查和土壤及苹果梨果实样品采集、测试的基础上,采用统计对比及相关分析方法研究了土壤钙元素全量、交换性钙及果实钙含量的空间差异,以及土壤-果实系统中钙元素的转化吸收特征及其对果实品质的影响,目的在于揭示钙元素的迁移转化规律及其生态效应,为土地利用服务。结果表明:延边地区土壤中钙全量总体上缺乏,不同研究区土壤-果实钙元素转化吸收差别明显;果实中钙元素含量趋于一致,其吸收系数在可变范围内与土壤交换性钙含量呈极显著负相关;土壤交换性钙含量与pH值呈极显著正相关,与果品品质的4项指标(总糖、总酸、可溶性固形物和维生素C)具有显著相关性,其含量丰富有利于果品品质的提高。

关键词：吉林延边土壤钙元素生态地球化学

铥、镱共掺可见光响应型纳米TiO_2光催化剂的制备及性能表征

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发光学报 2016年第11期37卷 1310-1315页

作者：袁云松吴从越李雨芬刘珺婉徐璇重庆大学三峡库区生态环境教育部重点实验室重庆400045

为了解决现有光催化剂对太阳光响应性能不佳且可见光响应型光催化剂制备条件苛刻等问题,研制了以TiO_2同时作为上转换材料基质和半导体光催化剂的光催化材料,并对不同n(Yb^(3+))∶n(Tm^(3+))掺杂下的光催化材料的上转换发光性能进行了... 详细信息

为了解决现有光催化剂对太阳光响应性能不佳且可见光响应型光催化剂制备条件苛刻等问题,研制了以TiO_2同时作为上转换材料基质和半导体光催化剂的光催化材料,并对不同n(Yb^(3+))∶n(Tm^(3+))掺杂下的光催化材料的上转换发光性能进行了研究。首先,设置一系列的n(Yb^(3+))∶n(Tm^(3+))比值,采用溶胶-凝胶法制备相应光催化材料。然后,对材料进行性能表征及降解实验,以亚甲基蓝为目标污染物,测试材料的实际催化降解效果。最后,通过分析材料的发光性能及降解性能,确定最优的n(Yb^(3+))∶n(Tm^(3+))比值。实验结果表明:当n(Yb^(3+))∶n(Tm^(3+))=4时,材料的发光性能最好,上转换现象最明显,可见光照射条件下的光催化降解效率最高,目标污染物降解率可达72.87%。所制备材料集上转换材料及光催化剂为一体,简化了制备程序,提高了能量利用效率。研制出的TiO_2∶1%Tm,4%Yb光催化材料最为理想,光谱响应范围向可见光区拓展,降解效果良好,能够实现对太阳光能量的高效利用。

关键词： TiO2 光催化可见光上转换 n(Yb^3+)∶n(Tm^3+)

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电气实训室漏电保护器误动作的故障分析

机械制造与自动化 2011年第2期40卷 134-135,141页

作者：李玉芬南京化工职业技术学院自控系江苏南京210048

电气实训室的漏电保护器是防止人身触电的有效措施。在一次照明电路实训的通电过程中,每次合闸,电气实训室的漏电保护器就会自动跳闸,在经过仔细的分析和查看后,终于找到问题所在,并排除了故障。

关键词：漏电保护器照明电路故障排除

Effects of mesoscale gravity waves on sporadic E simulated by a one-dimensional dynamic model

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Earth and Planetary Physics 2025年第1期9卷 1-9页

作者： Xu Zhou ZeZhong li XinAn yue liBo liu Key Laboratory of Earth and Planetary Physics/Heilongjiang Mohe National Geophysical Observatory/Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of Sciences(CAS)Beijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China

In addition to being driven by tidal winds,the sporadic E(Es)layers are modulated by gravity waves(GWs),although the effects are not yet comprehensively *** this article,we discuss the effects of mesoscale GWs on the Es layers determined by using a newly developed model,MISE-1D(one-dimensional Model of Ionospheric Sporadic E),with low numerical dissipation and high *** by the wind fields resolved by the high-resolution version of the Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension(WACCM-X),the MISE-1D simulation revealed that GWs significantly influence the evolution of the Es layer above 100 km but have a very limited effect at lower *** effects of GWs are diverse and complex,generally including the generation of fluctuating wavelike structures on the Es layer with frequencies similar to those of the *** mesoscale GWs can also cause increases in the density of Es layers,or they can disperse or diffuse the Es layers and increase their *** addition,the presence of GWs is a key factor in sustaining the Es layers in some cases.

关键词： sporadic E ion tidal layer gravity waves numerical simulation

不同硫酸铝用量对苏打盐碱土磷素形态及吸附特性的影响

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土壤通报 2008年第5期39卷 1120-1125页

作者：李月芬杨有德赵兰坡吉林大学地球科学学院吉林长春130061 吉林农业大学资源与环境学院吉林长春130118

通过室内模拟盆栽改良试验,研究了硫酸铝的改良效果及施用后对土壤中磷素营养状况的影响。硫酸铝配施磷肥和氮肥对小麦的出苗和生长起着明显促进作用。无机磷分级及相关分析结果表明,施加不同用量的硫酸铝后,各级无机磷平均含量的大小... 详细信息

通过室内模拟盆栽改良试验,研究了硫酸铝的改良效果及施用后对土壤中磷素营养状况的影响。硫酸铝配施磷肥和氮肥对小麦的出苗和生长起着明显促进作用。无机磷分级及相关分析结果表明,施加不同用量的硫酸铝后,各级无机磷平均含量的大小顺序为Ca2-P>Ca8-P>Al-P>O-P>Fe-P>Ca10-P,其中,Ca8-P和O-P是Ca2-P的有效补充。磷的吸附实验表明,各处理土壤磷的等温吸附曲线与Langmuir方程的吻合程度最好,其相关程度达极显著水平。根据简单Langmuir方程,将C/x/m对C作图,得到的是具有一个折点的直线,表明随着磷平衡浓度的不同,土壤对磷的吸附存在着两个不同能量水平的吸附点位。磷的解吸结果表明,在磷平衡浓度较低的条件下,土壤与磷的结合能力较强,大多以固定态磷的形式被吸附,并且,解吸也较困难;随着磷平衡浓度的增加,可交换磷所占的比例增加,有较多的磷可被解吸下来。

关键词：苏打盐碱土硫酸铝改良剂磷分级磷素形态磷的吸附磷的解吸

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硫酸铝改良剂对苏打盐碱土磷素形态的影响

水土保持学报 2006年第4期20卷 44-49页

作者：李月芬杨有德赵兰坡吉林大学地球科学学院吉林长春130061 吉林农业大学资源与环境学院吉林长春130118

通过室内模拟盆栽改良试验,研究了硫酸铝的改良效果及施用后对土壤中磷素营养状况的影响。硫酸铝配施磷肥和氮肥对小麦的出苗和生长起着明显的促进作用。在硫酸铝及氮肥用量一定的条件下,随磷肥用量的增加,小麦的出苗和生长没有明显变... 详细信息

通过室内模拟盆栽改良试验,研究了硫酸铝的改良效果及施用后对土壤中磷素营养状况的影响。硫酸铝配施磷肥和氮肥对小麦的出苗和生长起着明显的促进作用。在硫酸铝及氮肥用量一定的条件下,随磷肥用量的增加,小麦的出苗和生长没有明显变化。无论施磷与否,土壤有效磷曲线均随硫酸铝用量的增加而呈下降趋势。改良剂用量不变,随磷肥用量的增加,土壤有效磷含量也在不断增加。无机磷分级及相关分析结果表明,施加不同用量的硫酸铝后,在不施用磷肥的条件下,各级无机磷平均含量的大小顺序为O-P>C a10-P>A l-P>F e-P>C a2-P>C a8-P,其中C a8-P是C a2-P的有效补充;在施用磷肥的条件下,其变化顺序为C a2-P>C a8-P>A l-P>O-P>F e-P>C a10-P,其中C a8-P和O-P是C a2-P的有效补充;在硫酸铝为0.3%,施用不同用量磷肥条件下,其顺序为C a2-P>C a8-P>A l-P>F e-P>O-P>C a10-P,其中C a8-P、A l-P和F e-P成为C a2-P的有效补充。

关键词：吉林省苏打盐碱土硫酸铝改良剂磷分级磷素形态

Targets capture by distributed active swarms via bio-inspired reinforcement learning

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun Xu yue li Jun Sun Shuyuan Du Xinpeng Di Yuguang Yang Bo li Institute of Biomechanics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New Energy Technology Tsinghua University Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural swarms arranged from cells to herds are usually decentralized but display intriguing collective intelligence in coordinating individuals across large scales to efficiently achieve their common goals. Learning from nature may provide new strategies for controlling collective dynamics of synthetic swarms to accomplish specific functions. Here, we present a bioinspired computational framework that steers distributed active swarms to collectively capture and merge targets via reinforcement learning. We exploit collective milling structures of natural herds to cage the targets, and adopt a switching control policy inspired by sperms' chiral dynamics to optimize the trajectories of individuals, through which the active swarms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalable manner. There exists a critical swarm size, beyond which the excessive competition between agents would generate large mechanical forces, leading to capture instability but enabling the transition from short-distance to long-distance merging capture of multiple targets. This work provides physical insights into distributed active swarms and could offer a multilevel, decentralized strategy toward controlling swarm robotics in wide applications such as bio-medical devices, machine immunity, and target clearance.

关键词： swarm intelligence robotics multi-tasks artificial intelligence bionics