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低速无人车编队控制研究

计算机与数字工程 2019年第6期47卷 1539-1544页

作者：李通刘元盛钮文良钟启学郭笑笑北京联合大学

以基于行为法为基础,根据车辆的运动学模型利用李雅普诺夫法设计出领航跟随的编队控制器进行编队控制行为,以简化的VFH为队形避障控制行为。车辆间采用v2v通信机制进行车间通信,传输车辆运动信息。最后,再以实际车辆进行车辆的队形保持... 详细信息

以基于行为法为基础,根据车辆的运动学模型利用李雅普诺夫法设计出领航跟随的编队控制器进行编队控制行为,以简化的VFH为队形避障控制行为。车辆间采用v2v通信机制进行车间通信,传输车辆运动信息。最后,再以实际车辆进行车辆的队形保持和编队避障的实验,实验结果表明了该算法的有效性。

关键词：基于行为法领航跟随 VFH v2v

Residual stress and precipitation of Mg-5Zn-3.5Sn-1Mn-0.5Ca-0.5Cu alloy with different quenching rates

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Journal of Magnesium and Alloys 2021年第2期9卷 604-612页

作者： Cong Wang Tianjiao Luo Yunteng liu Qiuyan Huang yuansheng Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Shandong Key Laboratory for High Strength Lightweight Metallic Materials Advanced Materials InstituteShandong Academy of SciencesShandong 250014China

The effect of the quenching rate after solution treatment on the residual stress and precipitation behavior of a high strength Mg-5 Zn-3.5 Sn-1 Mn-0.5 Ca-0.5 Cu plate is *** simulation results show decreasing temperature gradient in the plate with decreasing quenching rate,which leads to weakened inhomogeneous plastic deformation and decreased residual *** dynamic precipitation on the grain boundary happens after either cold water cooling or air cooling,however,air cooling leads to dynamic precipitation of Mg-Zn phase on Mn particles around which a low-density precipitate zone develops after aging ***,the fine and densely distributed Mg-Zn precipitates observed after aging treatment of the cold water cooled alloy are replaced by coarse precipitates with low density for the air cooled *** the low-density precipitate zone near Mn particles and the coarsening of precipitates are the source of the decrease in hardness and tensile properties of the air cooled *** residual stress drops faster than the hardness with decreasing quenching rate,which makes it possible to lower the residual stress without sacrificing too much age-hardening ability of the alloy.

关键词： Mg-5Zn-3.5Sn-1Mn-0.5Ca-0.5Cu alloy Solution treatment Quenching rate Residual stress Precipitation Age-hardening

乌当区金华镇农用地土壤环境质量模糊综合评价

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贵州农业科学 2007年第4期35卷 52-55页

作者：舒英格何腾兵刘元生罗海波刘方贵州大学资源与环境研究所贵州贵阳550025

依据土壤环境质量各评价指标的渐变性和模糊性,采用模糊数学方法确定其隶属度函数并进行处理;选取5个土壤中最常见的有毒有害重金属污染因子镉、铅、铬、汞、砷为评价指标,应用模糊综合评判法对乌当区金华镇农用地78个样点的土壤进行环... 详细信息

依据土壤环境质量各评价指标的渐变性和模糊性,采用模糊数学方法确定其隶属度函数并进行处理;选取5个土壤中最常见的有毒有害重金属污染因子镉、铅、铬、汞、砷为评价指标,应用模糊综合评判法对乌当区金华镇农用地78个样点的土壤进行环境质量评价。结果表明,金华镇农用地环境质量为一级和二级的土壤所占比例为41.02%和35.90%,三级的为23.08%。说明,金华镇农用地土壤环境质量较好,有76.92%的农用地土壤环境质量处于农业安全生产的二级质量标准内,可以直接发展农业生产;但位于三级质量标准的农用地则应采取相应的治理措施改善土壤环境质量,调整农业产业结构,避免污染元素进入食物链,保证农用地的可持续发展和人类的健康生存。

关键词：土壤环境质量农用地质量评价模糊综合评价

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声光光信道监测仪的串扰特性研究

光通信研究 2009年第5期 57-59页

作者：曾召利肖立峰屈学民龙开平文峻张晓军刘渊声解放军第四军医大学生物医学工程系陕西西安710032 天津大学理学院应用物理系天津300072

文章介绍了基于集成光学声光可调谐滤波器(IAOTF)的光信道监测仪(OCM)的滤波特性,并进行了试验验证。研究了声光OCM不对称旁瓣产生的原因以及由它引起的串扰,结果表明,波导双折射率沿器件中心向两端的不均匀分布导致了旁瓣的产生,而OCM... 详细信息

文章介绍了基于集成光学声光可调谐滤波器(IAOTF)的光信道监测仪(OCM)的滤波特性,并进行了试验验证。研究了声光OCM不对称旁瓣产生的原因以及由它引起的串扰,结果表明,波导双折射率沿器件中心向两端的不均匀分布导致了旁瓣的产生,而OCM串扰的大小不仅与旁瓣的位置有关,还与旁瓣的强度有关,通过采用一种准共线级联结构可以有效地压缩旁瓣,大大降低OCM的串扰。

关键词：光信道监测仪旁瓣集成声光可调谐滤波器串扰

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning Chang liu Yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

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施肥对毛红椿幼林生长及叶片生理特征的影响

广西植物 2024年第1期44卷 147-156页

作者：潘俊彬刘远生张露程强强王健贾婷吴云燕郭春兰江西农业大学江西省森林培育重点实验室/江西特色林木资源培育与利用2011协同创新中心南昌330045 安福县明月山林场江西安福343200

为了探究珍贵树种毛红椿对施用不同肥料不同用量的响应,该文以毛红椿幼林为研究对象,设置氮肥(N)、磷肥(P)、复合肥(CF)及缓释肥(SRF)4种肥料3个施肥水平(高、中、低),研究施肥对毛红椿幼林生长和叶片养分、生理的影响。结果表明:(1)施... 详细信息

为了探究珍贵树种毛红椿对施用不同肥料不同用量的响应,该文以毛红椿幼林为研究对象,设置氮肥(N)、磷肥(P)、复合肥(CF)及缓释肥(SRF)4种肥料3个施肥水平(高、中、低),研究施肥对毛红椿幼林生长和叶片养分、生理的影响。结果表明:(1)施肥均可促进毛红椿树高和胸径生长,氮肥和复合肥效果更明显,氮肥处理的4年生毛红椿平均树高、平均胸径、平均材积较不施肥(CK)分别提高了15.0%、21.9%、67.5%,其中低氮肥(N1)处理的胸径年均生长量最大(2.99 cm),复合肥处理的平均树高、平均胸径、平均材积较CK分别提高了16.7%、19.2%、54.3%。高缓释肥(SRF3)和低磷肥(P1)分别在第4年树高、胸径的年增长量达到最大(分别为1.96 m、2.33 cm)。(2)施肥显著增加了毛红椿叶片叶绿素含量和非结构性碳水化合物含量,氮肥显著促进可溶性糖合成而磷肥显著促进淀粉合成。(3)N1和磷肥分别显著促进毛红椿叶片氮和磷含量的提高,磷肥、复合肥和氮肥均可显著提高叶片钾含量。(4)主成分分析结果表明,施肥促进生长效果依次为氮肥>复合肥>磷肥>缓释肥>不施肥,其中N1即100 g·plant-1·year-1的综合评价值最高。综合施肥成本和效益,施氮肥或复合肥能有效促进毛红椿幼林生长发育,推荐幼林期每年每株施100 g氮肥即可。该研究结果可为毛红椿造林初期林木养分管理提供参考。

关键词：毛红椿幼林施肥生长生理

Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

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Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu Wu Qi Chen Jiaxin Yang Bonan liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

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建筑环境精细化设计

河北冶金 2022年第5期 65-69页

作者：马晓春孔雪静刘远生李云鹏河钢集团唐钢公司河北唐山063000 唐钢国际工程技术股份有限公司河北唐山063000

从工业建筑“去工业化”、厂区景观绿化、厂区亮化、厂区管网综合等方面,详细介绍了河钢唐钢新区项目建筑环境精细化设计特色。其中,工业建筑“去工业化”设计主要包含3方面,即全厂构筑物外观美化设计、室内设计及导视系统设计,强调了... 详细信息

从工业建筑“去工业化”、厂区景观绿化、厂区亮化、厂区管网综合等方面,详细介绍了河钢唐钢新区项目建筑环境精细化设计特色。其中,工业建筑“去工业化”设计主要包含3方面,即全厂构筑物外观美化设计、室内设计及导视系统设计,强调了建筑与环境、人文相协调、相适应,提升了工作环境的品质;厂区景观绿化分区域设计,各区域呈现不同景观效果,项目采用合理的排盐碱措施,解决了植被成活问题;厂区亮化主要从重点区域景观亮化设计和生产区域功能亮化设计两方面,在满足光线使用要求的前提下,兼顾设备美观和节能环保;厂区管网综合从综合管廊设计、管道标识设计、母管制设计及防腐设计方面进行了全面介绍。力求为大型钢铁企业厂区建筑环境精细化、美观化设计提供一定的参考,为今后类似的设计工作提供新的思路。

关键词：大型钢铁企业建筑环境精细化设计

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