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Light(Science & Applications) 2024年第4期13卷 738-746页

作者： Zongliang Xie zhu mao Hailan Wang Yuxin Xiao Xiayu Zhang Tao Yu Zhongfu An Wei Huang Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an 710072China. Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518100China. Shenzhen Institutes of Advanced Electronic Materials Shenzhen 518100China. Key Laboratory of Flexible Electronics&Institute of Advanced Materials Nanjing Tech University30 South Puzhu RoadNanjing 211816China

Organic mechanoluminescence materials,featuring dual emission and ultralong phosphorescence characteristics,exhibit significant potential for applications in real-time stress sensing,pressure-sensitive lighting,advanced security marking techniques,and material breakage ***,due to immature molecular design strategies and unclear luminescence mechanisms,these materials remain rarely *** this study,we propose a valuable molecular design strategy to achieve dual-channel *** introducing the arylphosphine oxide group into a highly twisted molecular framework,enhanced intra-and intermolecular interactions could be achieved within rigid structures,leading to dual-channel mechanoluminescence with greatly promoted ultralong *** investigations reveal the substantial boosting effect of intra-and intermolecular interactions on mechanoluminescence and ultralong phosphorescence properties by locking the highly twisted molecular *** work provides a concise and guiding route to develop novel smart responsive luminescence materials for widespread applications in material science.

关键词： channel luminescence locking

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沉思与寂静:韩炳哲论海德格尔之“心”

哲学动态 2024年第8期 67-77,127,128页

作者：毛竹中国社会科学院大学、中国社科学院哲学研究所

《海德格尔之心》中韩炳哲对海德格尔的阐释,并不完全属于正统学院派海德格尔研究的范畴,但这些阐释贯穿韩炳哲此后的诸多作品。韩炳哲看到,海德格尔之“心”民既是克服形而上学主体性之经济和计算图景的隐喻,也是一种非形而上学的思维... 详细信息

《海德格尔之心》中韩炳哲对海德格尔的阐释,并不完全属于正统学院派海德格尔研究的范畴,但这些阐释贯穿韩炳哲此后的诸多作品。韩炳哲看到,海德格尔之“心”民既是克服形而上学主体性之经济和计算图景的隐喻,也是一种非形而上学的思维方式;但是早期海德格尔存在之“心”的情绪与声音仍然带有主体性的痕迹,他克服形而上学的努力并没有超出形而上学的范畴。韩炳哲认为,海德格尔试图通过“思”“痛苦”与“畏”等概念跨越形而上学的门槛,但未能成功,并且他的很多概念在现代绩效世界面前已经失去了阐释效力。因此在韩炳哲笔下,一方面,社会批判理论巫函需对《存在与时间》进行“数字化升级”;另一方面,克服形而上学的可能性仍然存在于海德格尔提出的“怯”“沉思”与“寂静”等概念之中。

关键词：韩炳哲《海德格尔之心》情绪沉思寂静

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LED驱动器的反馈控制闭环电路分析

信息化研究 2024年第2期50卷 74-78页

作者：毛竹卡任特照明(上海)有限公司上海201203

本文介绍以电流反馈的半桥开关控制驱动LED的实用电路。以半桥驱动作为主电路并用变压器作为隔离电路,同时以电阻作为负载LED的电流检测传感器以及放大器、光耦隔离作为负反馈回路。推导出每个子电路的传递函数,把所有子电路的传递函数... 详细信息

本文介绍以电流反馈的半桥开关控制驱动LED的实用电路。以半桥驱动作为主电路并用变压器作为隔离电路,同时以电阻作为负载LED的电流检测传感器以及放大器、光耦隔离作为负反馈回路。推导出每个子电路的传递函数,把所有子电路的传递函数集合成幅频特性和相频特性的表达式,利用MathCAD画出幅频特性和相频特性的波特图。通过调整电路元器件的参数,最终满足波特图稳定裕度判定方法来确定负反馈环路系统的稳定性。

关键词：半桥控制负反馈环路幅频和相频特性 MathCAD 波特图稳定裕度

采煤机重载工况下转矩自动化补偿控制方法的研究

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机械管理开发 2024年第6期39卷 323-325页

作者：朱懋同发东周窑煤业有限公司山西大同037100

采煤机是进行煤矿开采的重要设备,具有破煤能力强的特点。在破煤过程中,由于煤岩分布的复杂多变,使得滚筒受到随机性多载荷的冲击作用,容易造成滚筒的磨损,特别是硬质颗粒引起的重载冲击作用。针对采煤机重载工况下的“截割-牵引”系统... 详细信息

采煤机是进行煤矿开采的重要设备,具有破煤能力强的特点。在破煤过程中,由于煤岩分布的复杂多变,使得滚筒受到随机性多载荷的冲击作用,容易造成滚筒的磨损,特别是硬质颗粒引起的重载冲击作用。针对采煤机重载工况下的“截割-牵引”系统的调节控制进行分析,以直接转矩控制及自动化转矩补偿控制两种方式进行对比分析,建立“截割-牵引”系统的耦合模型,对重载突变工况下的转矩控制效果进行仿真分析,从而提高采煤机的调节控制效果,保证重载工况下使用的稳定可靠性。

关键词：采煤机截割控制重载突变直接转矩补偿控制仿真分析

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煤矿工作面液压支架稳定性分析

机械管理开发 2024年第5期39卷 306-307,310页

作者：朱懋同发东周窑煤业有限公司机掘六队山西大同037100

为提高开采期间支架的稳定性,减少支架倾斜倒架现象,结合现场过断层试验及对大倾角工作面正常开采时支架的稳定性进行综合分析。通过现场应用,表明选用型号为ZZ8400/21/48,临界倾倒支护阻力为6980.81 kN、滑移支护阻力为5979.21 kN的液... 详细信息

为提高开采期间支架的稳定性,减少支架倾斜倒架现象,结合现场过断层试验及对大倾角工作面正常开采时支架的稳定性进行综合分析。通过现场应用,表明选用型号为ZZ8400/21/48,临界倾倒支护阻力为6980.81 kN、滑移支护阻力为5979.21 kN的液压支架,在开采大倾角工作面过断层期间,支架的稳定性大大提升,解决了在施工过程中支架失稳的问题。

关键词：大倾角过断层液压支架稳定性

砂土地层深基坑施工对侧方地铁隧道形变影响研究

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工程建设与设计 2024年第7期 61-64页

作者：朱茂国中铁第六勘察设计院集团有限公司天津300308

以沈阳市某工程为背景,采用有限元软件Midas GTS建立三维有限元分析模型,对基坑开挖引起侧方地铁盾构隧道三维变形进行数值分析,并将隧道模拟结果与实测变形值进行比较。研究表明:基坑开挖引起地铁隧道结构产生一定水平和竖向变形,整体... 详细信息

以沈阳市某工程为背景,采用有限元软件Midas GTS建立三维有限元分析模型,对基坑开挖引起侧方地铁盾构隧道三维变形进行数值分析,并将隧道模拟结果与实测变形值进行比较。研究表明:基坑开挖引起地铁隧道结构产生一定水平和竖向变形,整体变形趋势为斜向上指向基坑,水平位移和竖向位移均呈现两端变形小、中间变形大的抛物线规律,且隧道变形最大值位于基坑边线中点处,从监测结果可以得出水平及竖向变形值分别为3.5mm与2.98mm,水平位移量略大于竖向位移量,与数值模拟分析结果吻合度较好。

关键词：深基坑隧道变形监测数值分析

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Effect of hydration on the elasticity of mantle minerals and its geophysical implications

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Science China Earth Sciences 2016年第5期59卷 873-888页

作者： mao zhu LI XinYang Laboratory of Seismology and Physics of Earth's Interior School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China National Geophysics Observatory at Mengcheng Mengcheng 233500 China

Recent studies have shown that major nominally anhydrous minerals in the Earth's mantle, such as olivine, pyroxene and garnet, can incorporate considerable amounts of water as structurally bound hydroxyl. Even a small amount of water is present in mantle minerals, it can strongly affect a number of physical properties, including density, sound velocity, melting temperature, and electrical conductivities. The presence of water can also influence the dynamic behavior, lead to lateral velocity heterogeneities, and affect the material circulation of the Earth's deep interior. In particular, seismic studies have reported the existence of low-velocity zones in various locations of the Earth's upper mantle and transition zone, which has been expected to be associated with the presence of water in the region. In the past two decades, the effect of water on the elasticity and sound velocities of minerals at relevant pressure-temperature(P-T) conditions of the Earth's mantle attracted extensive interests. Combining the high P-T experimental and theoretical mineralogical results with seismic observations provides crucial constraints on the distribution of water in the Earth's mantle. In this study, we summarize recent experimental and theoretical mineral physics results on how water affects the elasticity and sound velocity of nominally anhydrous minerals in the Earth's mantle, which aims to provide new insights into the effect of hydration on the density and velocity profile of the Earth's mantle, which are of particular importance in understanding of water distribution in the region.

关键词： Water Elasticity Sound velocity Upper mantle Transition zone Olivine polymorphs

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基于InSAR的建筑安全风险监测方法

建设科技 2024年第9期 76-79页

作者：朱茂郭唐北京东方至远科技股份有限公司北京100081

城市建筑安全直接关系到公众的生命与财产安全,为实现现代化城市防灾减灾的安全监管目标,本研究围绕InSAR技术,提出一种针对城市建筑的安全风险监测评估方法。通过提取建筑PS点并进行聚类分析,精准获取聚类点的形变信息,依据相关指标筛... 详细信息

城市建筑安全直接关系到公众的生命与财产安全,为实现现代化城市防灾减灾的安全监管目标,本研究围绕InSAR技术,提出一种针对城市建筑的安全风险监测评估方法。通过提取建筑PS点并进行聚类分析,精准获取聚类点的形变信息,依据相关指标筛选出有效形变数据,全面评估目标区域内建筑设施的安全风险状况。以福州市仓山区为例,利用COSMO-SkyMed数据进行实验,并进行实地踏勘证实了该方法的可行性和准确性。证明该方法能为城市建筑的安全检查提供技术支持,有助于提前发现并处理潜在安全问题,提升城市建筑安全水平。

关键词：城市建筑设施 PS-InSAR技术安全风险评估福州市仓山区

Effects of chemical,mineralogical,and temperature variations on the density and bulk sound velocity of the bottom lower mantle

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Science China Earth Sciences 2016年第10期59卷 2062-2077页

作者： BIAN Hui SUN NingYu mao zhu Laboratory of Seismology and Physics of Earth's Interior School of Earth and Planetary SciencesUniversity of Science and Technology of ChinaHefei 230026China National Geophysics Observatory at Mengcheng Mengcheng 233500China

In this study, we have modeled the density （p） and bulk sound velocity （V.） profiles of the bottom lower mantle using the experimental thermal equation of state （EoS） parameters of lower-mantle minerals, including bridgmanite, ferropericlase, CaSiO3-perovskite, and post-perovskite. We re-evaluated the literature pressure-volume-temperature relationships of these minerals using a self-consistent pressure scale in order to avoid the long-standing pressure scale problem and to provide more reliable constraints on the thermal EoS parameters. With the obtained thermal EoS parameters, we have constructed the p and V. profiles of the bottom lower mantle in different composition, mineralogy, and temperature models. Our modelling results show that the variations of chemistry, mineralogy, and temperature and AI enrichment at the bottom lower mantle can cause an increase have different seismic signatures from each other. The Fe in p but greatly lower V.. A change in mineralogy needs to be considered with the lateral variation in temperature. The cold slabs will be shown as denser regions compared to the normal mantle because of the combined effect of a lower temperature and the presence of a denser post-perovskite at a shallower depth, whereas the hot regions will have a 1-2% lower p than the normal mantle. V, of both cold slabs and hot regions will he lower than the normal mantle when bridgmanite is the dominant phase in the normal mantle, yet they will be greater once bridgmanite transforms into post-perovskite in the normal mantle. Our modeling also shows that the presence of a （Fe, Al）-enriched bridgmanite thermal pile above the core-mantle boundary will exhibit a seismic signature of enhancedp and V., but a reduced Vs, which is consistent with the observed seismic anomalies in the large-low-shear-velocity-provinces （LLSVPs）. The existence of such a （Fe, A1）-enriched bridgmanite thermal pile thus can help to understand the origin of the LLSVPs. These results provide new in

关键词： Bottom lower mantle Density Bulk sound velocity Chemical heterogeneity Temperature

On the stochastic dynamics of molecular conformation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1401-1407页

作者： DENG mao-lin zhu Wei-qiu Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

An important functioning mechanism of biological macromolecules is the transition between different conformed states due to thermal fluctuation. In the present paper, a biological macromolecule is modeled as two strands with side chains facing each other, and its stochastic dynamics including the statistics of stationary motion and the statistics of conformational transition is studied by using the stochastic averaging method for quasi Hamikonian systems. The theoretical results are confirmed with the results from Monte Carlo simulation.

关键词： Biological macromolecule Thermal fluctuation Stationary statistics Transition time Stochastic averaging method