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套作玉米对华中五味子幼苗生长及根际土壤微生物群落的影响

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西北农业学报 2024年第8期33卷 1506-1514页

作者：孙萌迪闫鹏东邱浩尚晶晶孙浩轩崔浪军李玉龙陕西师范大学生命科学学院西北濒危药材资源开发国家工程实验室药用资源与天然药物化学教育部重点实验室西安710119

玉米套作如何影响华中五味子(Schisandra sphenanthera *** Wils)幼苗生长及根际微生物群落结构尚不清楚。本研究通过大田试验将华中五味子与玉米套作,探究套作对华中五味子植株生物量的影响,并使用高通量测序技术对华中五味子根际土壤... 详细信息

玉米套作如何影响华中五味子(Schisandra sphenanthera *** Wils)幼苗生长及根际微生物群落结构尚不清楚。本研究通过大田试验将华中五味子与玉米套作,探究套作对华中五味子植株生物量的影响,并使用高通量测序技术对华中五味子根际土壤的细菌、真菌群落结构进行测定。结果表明,套作增加华中五味子生物量(茎长、地径、地上部分干质量、地下部分干质量)。此外,和单作相比,与玉米套作显著改变了华中五味子土壤微生物群落结构,且提高了部分与华中五味子生物量呈正相关根际促生菌如Pseudomonas(假单胞菌)、Gaiella、Kotlabaea等的丰度。且这些与华中五味子呈正相关的细菌、真菌受氮、磷、铝等及部分微量元素调控。本研究将为华中五味子幼苗管理提供候选方案及相关理论依据。

关键词：华中五味子套作与单作生物量根际微生物根际微生物溯源

Degradation mechanism and stability improvement of formamidine-based perovskite solar cells under high humidity conditions

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Nano Research 2022年第10期15卷 8955-8961页

作者： Fengren Cao Peng Zhang haoxuan sun Meng Wang Liang Li School of Physical Science and Technology Center for Energy Conversion Materials&Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China

Formamidine(FA)-based perovskite solar cells(PSCs)are promising candidates for photoelectric conversion devices due to their excellent optoelectronic ***,the instability of perovskites,especially moisture instability,remains one of the biggest obstacles to the commercialization of perovskite ***,it is very important to explore and target the effect of moisture on FA-based perovskites to prevent this effect and improve device ***,we studied the degradation process of commonly used FA-based perovskite films by X-ray diffraction and scanning electron microscopy characterization and analyzed the reasons for their humidity-induced ***,we further adopted a strategy by adding methylammonium bromine powder into a PbI_(2) precursor solution to prepare a seed solution in a two-step preparation process to enhance the performance and stability of FA-based ***,the degradation rate of the obtained perovskite film was significantly slowed down under high humidity compared to that of perovskite films prepared by a two-step method without applying a seed *** corresponding device achieved a remarkable power conversion efficiency of 23.22%,and the efficiency of this device showed no attenuation after 900 h of exposure to air.

关键词： formamidine-based perovskite moisture degradation solar cell seed solution

黑龙江数字孪生水利平台数据模型构建技术研究

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水利科学与寒区工程 2024年第5期7卷 128-131页

作者：李昕燃孙浩轩刘勇东北农业大学水利与土木工程学院黑龙江哈尔滨150080 黑龙江省水利科学研究院黑龙江哈尔滨150080

为了提高数据应用效率,通过运用数据抽取、数据清洗、数据整理、建模分析、模型测试、优化等,形成可视化的数据模型,解决数据冗余、不准确、不安全、缺乏灵活性等问题,实现建设单位自行管理数据资源,掌握数据运行的生命周期、确保数据... 详细信息

为了提高数据应用效率,通过运用数据抽取、数据清洗、数据整理、建模分析、模型测试、优化等,形成可视化的数据模型,解决数据冗余、不准确、不安全、缺乏灵活性等问题,实现建设单位自行管理数据资源,掌握数据运行的生命周期、确保数据更新协同,提高数据应用效率,推动龙江数字经济建设、水利高质量发展。

关键词：数据源水利数据分类数据关系水利数据模型可视化数据模型优化

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韩国2024年对外贸易环境研判分析

东北亚经济研究 2024年第4期8卷 45-56页

作者：齐冠钧尹政平孙浩轩商务部国际贸易经济合作研究院北京100710

韩国是一个以出口为导向的国家,但因缺乏天然资源,产业动力原油仍需仰赖进口,每当国际市场发生重大变动或原油价格上涨时,其对外贸易都会受到极大的冲击,甚至对韩国的整体经济增长及发展产生一定程度的影响。在2024年全球经济不确定发... 详细信息

韩国是一个以出口为导向的国家,但因缺乏天然资源,产业动力原油仍需仰赖进口,每当国际市场发生重大变动或原油价格上涨时,其对外贸易都会受到极大的冲击,甚至对韩国的整体经济增长及发展产生一定程度的影响。在2024年全球经济不确定发展的背景下,通过对韩国对外贸易环境、进出口特征、FTA签署情况等方面展开分析评估,对韩国几大类优势产品在2024年的出口情况进行预测。由于中韩两国经济具有高度的互补性,针对韩国外贸环境的分析及预测结果亦可作为我国企业界及贸易厂商的参考要素。

关键词：韩国对外贸易贸易环境进出口特征

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基于通道注意力与光照权重的无监督低照度图像增强

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软件导刊 2024年第7期23卷 167-173页

作者：杨猛杜晓刚张学军孙浩轩陕西科技大学陕西省人工智能联合实验室陕西科技大学电子信息与人工智能学院陕西西安710021 兰州交通大学电子与信息工程学院甘肃兰州730070

现有部分无监督低照度图像增强方法在增强图像曝光不足的区域时会降低其高光区域亮度,导致增强后的图像出现伪影;单一的TV损失既无法区别照明特征图的细节,还会忽略照明特征图边缘明暗度差异突出的地区,导致光晕现象的产生。为此,提出... 详细信息

现有部分无监督低照度图像增强方法在增强图像曝光不足的区域时会降低其高光区域亮度,导致增强后的图像出现伪影;单一的TV损失既无法区别照明特征图的细节,还会忽略照明特征图边缘明暗度差异突出的地区,导致光晕现象的产生。为此,提出一种基于通道注意力与光照权重的无监督低照度图像增强方法 VARRNet。首先,VARRNet将图像转化为HSV空间,将V空间与Retinex理论结合以避免损失信息;其次,为了防止在亮度增强过程中生成伪影,设计了一个亮度估计网络引入通道注意力ECA分配输入特征图的权重,以恢复曝光不足区域的亮度,并有效保持高光区域的亮度;最后,在亮度估计网络中结合TV损失与光照分量权重来保留增强后特征图的丰富细节信息,消除强边缘处的光晕。在与当前流行的5个低照度图像增强方法进行比较实验发现,VARRNet在亮度增强、细节保留、色彩恢复、伪影抑制和光晕去除等方面均取得了更好的可视化效果。

关键词：无监督学习 Retinex 低照度图像增强通道注意力照明平滑度

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Electrospun perovskite nano-network for flexible, near-room temperature, environmentally friendly and ultrastable light regulation

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Journal of Materials Science & Technology 2022年第35期130卷 35-43页

作者： Yongliang Li haoxuan sun Zhen Li Min Wang Linqi Guo Liangliang Min Fengren Cao Yeqiang Tan Liang Li State Key Laboratory of Bio-Fibers and Eco-Textiles&Institute of Marine Biobased Materials&Collage of Materials Science and Engineering Qingdao UniversityQingdao 266071China School of Physical Science and Technology Jiangsu Key Laboratory of Thin FilmsCenter for Energy Conversion Materials&Physics(CECMP)Soochow UniversitySuzhou 215006China

Light regulation devices are essential for signal modulation, information encryption and energy-saving smart windows. Recently, due to their excellent stimuli-responsive properties, lead halide perovskites have shown great potential. However, the high transition temperature, irreversibility of the phase transition and toxicity of heavy metals make perovskite materials unsuitable for devices related to human activity. Herein, for the first time, a flexible perovskite nano-network is proposed and its application as a smart window is demonstrated. The perovskite-sodium alginate(SA) nano-network showed a 31.6 ℃(20% RH) transition temperature and stability over 1200 cycles. The hydrophobic surface and the “eggbox” structure formed by SA make that the lead leakage is only 2.569 ppb, which is much higher than the drinking water standard. This work provides a successful demonstration for energy-efcient buildings and inspires future nontoxic perovskite-based devices through heavy metal control.

关键词： Sodium alginate Perovskite Phase transition Thermochromism Light regulation

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Perovskite single crystals:physical properties and optoelectronic applications

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Materials Futures 2023年第4期2卷 1-32页

作者： Chen Li haoxuan sun Shan Gan Da Dou Liang Li School of Physical Science and Technology Jiangsu Key Laboratory of Thin FilmsCenter for Energy Conversion Materials&Physics(CECMP)Soochow UniversitySuzhou 215006People’s Republic of China

Single crystal is the most advantageous of the crystalline states of halide *** displays better optical and electrical capabilities than polycrystalline films and microcrystals due to their inherent structural advantages,such as free grain boundaries,long-range ordered structure,and high ***-crystal perovskite materials can theoretically enable optoelectronic devices with higher performance and stronger *** this review,the intrinsic physical properties of perovskite single crystals are *** most recent advances in single-crystal optoelectronic devices are reviewed,and the design principles of the devices under different application conditions are *** provides potential solutions for remaining challenges,and it is expected to accelerate the development of perovskite based optoelectronic devices.

关键词： perovskite single crystals physicalproperties optoelectronic applications

Miniature integrated spectrometers towards high-performance and cost-effective

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Light(Science & Applications) 2023年第11期12卷 2274-2276页

作者： haoxuan sun Yicheng Zhou Liang Li School of Physical Science and Technology Jiangsu Key Laboratory of Thin FilmsCenter for Energy Conversion Materials&Physics(CECMP)Soochow UniversitySuzhou 215006China

The conjugated mode of bound states in a continuum is integrated as a narrowband wavelength extraction unit.A low-cost and easy-to-prepare strategy,using solution-processable semiconductors,has been demonstrated to fo... 详细信息

关键词： cost analysis. performance

Comparing containment measures among nations by epidemiological effects of COVID-19

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National Science Review 2020年第12期7卷 1847-1851页

作者： Jia Gu Han Yan Yaxuan Huang Yuru Zhu haoxuan sun Yumou Qiu Songxi Chen Center for Statistical Science Peking University Guanghua School of Management Peking University School of Mathematical Sciences Sichuan University Yuanpei College Peking University Center for Data Science Peking University Department of Statistics Iowa State University

The coronavirus disease 2019 (COVID-19) has evolved to a global pandemic since its inception in December *** have responded to the epidemics with different levels of responses and containment *** the unprecedented pressure on nations’healthcare systems and the deaths so far,there is an urgent need to evaluate the effects of the containment measures,which would be useful for countries to plan for their responses to counter the first or possibly the second wave of the epidemic.

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