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Portable hydrogel-based tri-channel fluorescence sensor array for visual detection of multiple explosives

Nano Research 2024年第7期17卷 6483-6492页

作者： Wenxing Gao Wenfeng liu Saijin Huang lin Wang Yingying Jian Yutong li Weiwei Wu li shang State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China School of Advanced Materials and Nanotechnology Xidian UniversityXi'an 710126China Honors College Northwestern Polytechnical UniversityXi'an 710119China

The identification and detection of various types of explosives are essential for human health and environmental ***-based sensing approach offers significant advantages in detecting multi-analytes simultaneously,thereby holding great potential in identifying multiple ***,we report a tri-channel fluorescence array composed of three distinct fluorescence probes based on gold nanoclusters and nicotinamide adenine dinucleotide with well-separated emission *** the specific interactions of explosives with different fluorescent probes and the yielded response patterns,seven explosives can be successfully distinguished with 100%*** particular,the sensor array exhibits excellent performance in the quantitative analysis of individual explosive and the differentiation of multiple explosive *** facilitate the field detection towards practical application,the tri-channel fluorescence array was further integrated with polymer *** fabricated portable hydrogel-based array sensors can not only visually identify seven different explosives by their distinct fluorescence color change,but also enable quantitative detection based on linear discriminant analysis(LDA)together with a *** study illustrates the great potential of hydrogel-based fluorescence sensor array as robust sensors for explosives,which also holds significant promise for the development of portable explosive devices towards practical application.

关键词： sensor array gold nanoclusters explosives fluorescence hydrogels

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Impact of the Political Risk on Food Reserve Ratio:Evidence Across Countries

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Journal of Systems Science & Complexity 2024年第5期 2071-2103页

作者： XING Kai li shang YANG Xiaoguang School of Economics&Management Nanchang University Department of Statistics and Data Science National University of Singapore Academy of Mathematics and Systems Science Chinese Academy of Sciences University of Chinese Academy of Sciences

Using an unbalanced panel data covering 75 countries from 1991 to 2019, the authors explore how the political risk impacts on food reserve ratio. The empirical findings show that an increasing political risk negatively affects food reserve ratio, and the same effects hold for both internal risk and external risk. Moreover, the authors find that the increasing external or internal risks both negatively affect food production and food exports, but external risk does not significantly impact food imports and it positively impacts food consumption, while internal risk negatively impacts food imports and food consumption. The results suggest that most governments have difficulty raising subsequent food reserve ratios in face of an increasing political risk, no matter if it is an internal risk or an external risk although the mechanisms behind the impacts are different.

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Thermally modulated photoelectronic synaptic behavior in HfS2/VO2 heterostructure

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Rare Metals 2024年第08期43卷 3798-3809页

作者： Le Wang lin Wang Xiao-Yun Ye Xiong-Hu Xu li-Yan shang Ya-Wei li Jin-Zhong Zhang liang-Qing Zhu Zhi-Gao Hu Technical Center for Multifunctional Magneto-Optical Spectroscopy (shanghai) Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education) Department of PhysicsSchool of Physics and Electronic ScienceEast China Normal University Collaborative Innovation Center of Extreme Optics Shanxi University

Neuromorphic computing is known for its efficient computational speed,low latency,and reduced power consumption,which is considered a pivotal technology to overcome the von Neumann *** synapses are an indispensable component of neuromorphic computational artificial neural *** guarantee effective and precise processing of optical signals,it must have a high responsivity,detectivity,and the ability to adapt to various ***,a synaptic transistor based on the HfS2/VO2heterojunction with a responsivity of8.6×10～3 A·W-1and a detectivity of 1.26×1014Jones at405 nm laser was ***,the typical synaptic behavior was successfully simulated,including postsynaptic currents（PSCs）,the transition from shortterm plasticity（STP） to long-term plasticity（LTP）.When VO2converts from the semiconductor state to the metal state,the HfS2/VO2heterojunction transforms into a Schottky heterojunction from a Type Ⅱ heterojunction with ***'s important,the heterojunction still exhibits excellent responsivity and detectivity,as well as stability of synaptic *** addition,the classical Pavlovian conditioning experiment is simulated under different laser intensity to study the brain's associative learning *** results demonstrate that the HfS2/VO2heterojunction synapse exhibits significant responsivity and detectivity and is adaptable to high-temperature environments,showing great potential for neuromorphic computational applic ations.

关键词： HfS 2 VO 2 Phase transition Photoelectric synapse Heterojunction

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Assessment of cheese sign and its association with vascular risk factors:Data from PUMCH dementia cohort

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Chinese Medical Journal 2024年第7期137卷 830-836页

作者： Xinying Huang Bo Hou Jie Wang Jie li li shang Chenhui Mao liling Dong Caiyan liu Feng Feng Jing Gao Bin Peng Department of Neurology State Key Laboratory of Complex Severe and Rare DiseasePeking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijing 100730China Department of Radiology Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Background:In the clinic,practitioners encounter many patients with an abnormal pattern of dense punctate magnetic resonance imaging(MRI)signal in the basal ganglia,a phenomenon known as"cheese sign".This sign is reported as common in cerebrovascular diseases,dementia,and old ***,cheese sign has been speculated to consist of dense perivascular space(PVS).This study aimed to assess the lesion types of cheese sign and analyze the correlation between this sign and vascular disease risk ***:A total of 812 patients from Peking Union Medical College Hospital(PUMCH)dementia cohort were *** analyzed the relationship between cheese sign and vascular *** assessing cheese sign and defining its degree,the abnormal punctate signals were classified into basal ganglia hyperintensity(BGH),PVS,lacunae/infarctions and microbleeds,and counted *** type of lesion was rated on a four-level scale,and then the sum was calculated;this total was defined as the cheese sign *** and Age-Related White Matter Changes(ARWMC)scores were used to evaluate the paraventricular,deep,and subcortical gray/white matter ***:A total of 118 patients(14.5%)in this dementia cohort were found to have cheese ***(odds ratio[OR]:1.090,95%confidence interval[CI]:1.064-1.120,Plipidemia,and cheese *** main components of cheese sign were BGH,PVS,and lacunae/*** proportion of PVS increased with cheese sign ***:The risk factors for cheese sign were hypertension,age,and *** sign consists of BGH,PVS,and lacunae/infarction.

关键词： Dementia Cerebrovascular disease Cheese sign Dense punctate lesions Basal ganglia Risk factor White matter

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A justice and innovative way ahead of consumption-based emission accounting approach

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Science China Earth Sciences 2024年

作者： Qun SHEN Hongbo DUAN Yun TANG linbing TANG li shang Xinyu DOU Wei WEI Weiqiang CHEN Zhu liU State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization CAS Key Laboratory of Low-Carbon Conversion Science &Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences School of Economics & Management University of Chinese Academy of Sciences Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Department of Earth System Science Tsinghua Univesity

Carbon emission accounting is an important basis for global climate governance. Based on the consumption-based accounting (CBA) method, the characteristics of carbon flow between national, regional, and product processes could be more clearly reflected. Therefore, CBA is more conducive to clarifying the attribution of responsibilities between producers and consumers, with the principles of fairness and justice. By accounting for carbon emissions in typical countries from 1990 to 2019, we found that the CBA emissions are higher than the production-based accounting (PBA) emissions in major developed countries, while the results are reversed for developing countries. In the past 30 years, the CBA emissions in targeted developed countries generally have shown a downward trend, while in developing countries, they have shown an upward trend. CBA emissions in China have shown a continuous growth trend from 1990 to 2019, but the pace has slowed down significantly over the last decade. Meanwhile, the embodied carbon intensity of China’s exports continues to decline, indicating that China is providing more green and low-carbon products to the world. Taking the PV industry as an example, this study further reveals the contribution of specific product industries to the country’s carbon transfer through product carbon footprint analysis. In order to provide a scientific basis for global mitigation and climate governance, it is urgent to innovate a scientific, practical, and standardized CBA technology system.

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Network Pharmacology and Experimental Study of MomordicineⅠand MomordicineⅡfrom Bitter Melon Saponins in Inhibiting Fat Accumulation

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Biomedical and Environmental Sciences 2024年第5期37卷 526-530页

作者： HUANG Shi Ting li shang Yuan li Xin Yu ZHU Ying ZHU lin ZHANG Jia Yan ZHAO Yan Sheng DAGliA Maria XIAO Xiang BAI Juan School of Food and Biological Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina Department of Pharmacy University of Napoli FedericoⅡVia D.Montesano 4980131 NaplesItaly International Research Center for Food Nutrition and Safety Jiangsu UniversityZhenjiang 212013JiangsuChina

Bitter melon(Momordica Charania L.),a member of the Cucurbitaceae family,is widely distributed across tropical and subtropical ***,an important functional component of bitter melon,has been proven to exert hypoglycemic effects similarly to insulin,and also possesses lipid-lowering properties inhibiting preadipocyte differentiation and fat synthesis^([1]).

关键词： melon Momordica subtropical

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面向低重叠率点云匹配的多层级过滤网络

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光学精密工程 2024年第11期32卷 1759-1772页

作者：贺敏琦刘俐李尚吴浩朱大虎武汉理工大学现代汽车零部件技术湖北省重点实验室湖北武汉430070 武汉理工大学汽车零部件技术湖北省协同创新中心湖北武汉430070

针对点云测量过程中由于结构遮挡、视场约束、拼接误差等导致的匹配失真问题,提出一种多层级过滤网络(Multi-level Filter Network,MulFNet)用于实现单次测量点云低重叠率下的精确配准。通过特征金字塔编码网络提取点云的多层级特征,获... 详细信息

针对点云测量过程中由于结构遮挡、视场约束、拼接误差等导致的匹配失真问题,提出一种多层级过滤网络(Multi-level Filter Network,MulFNet)用于实现单次测量点云低重叠率下的精确配准。通过特征金字塔编码网络提取点云的多层级特征,获得不同尺度的语义信息,同时嵌入注意力模块和信息编码模块以增强特征显著性。基于多尺度一致性决策机制对多层级特征进行过滤,筛选离群点并保留点云突出特征,获得初始对应关系。最后,将初始对应结点基于几何信息自适应分组,由局部至全局进行加权转换估计,获得基于多层级过滤筛选后的预测矩阵。实验结果表明,MulFNet网络在标准3DMatch公共数据集上的匹配效果明显优于FCGF,PREDATOR等主流网络,在平均重叠率为10%的测量数据集上的匹配精度比ICP算法和GeoTransformer网络分别提高40.9%和85.4%,有效解决了低重叠率点云匹配失真的问题。

关键词：点云匹配匹配失真低重叠率多层级过滤局部测量

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水环境优控污染物筛选研究进展

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环境化学 2024年第6期43卷 1966-1979页

作者：李上李雁宾中国海洋大学化学化工学院青岛266100 中国海洋大学海洋化学理论与工程技术教育部重点实验室青岛266100

随着社会经济的快速发展,大量污染物排放到水环境中,使得水环境污染和治理问题备受关注.明确水环境优控污染物是科学有序开展水污染治理的前提.本文综述了水环境优控污染物筛选的原则和常用技术方法,并分析了不同方法的优缺点.通过比较... 详细信息

随着社会经济的快速发展,大量污染物排放到水环境中,使得水环境污染和治理问题备受关注.明确水环境优控污染物是科学有序开展水污染治理的前提.本文综述了水环境优控污染物筛选的原则和常用技术方法,并分析了不同方法的优缺点.通过比较不同水环境体系优控污染物的筛选结果,发现不同系统的优控污染物名单具有较大差异,因此应根据各地不同的污染特征,制定因地制宜的优控污染物名单.此外,在传统污染物筛选工作的基础上,未来应加强对新污染物的监测和评估,及时更新优控污染物名单,为水环境的保护和治理提供更全面的决策依据.

关键词：水环境优控污染物筛选方法优先排序污染物毒性

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当代儒学已进入繁星满天的时代——当代儒学发展的省察与反思学术研讨会致辞

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周易研究 2024年第1期 108-109页

作者：李尚信山东大学易学与中国古代哲学研究中心山东济南250100

尊敬的林安梧教授、各位专家学者、各位朋友:大家上午好!欢迎大家在百忙中来到山东大学参加当代儒学发展的省察与反思学术研讨会!衷心感谢大家对我们山东大学易学与中国古代哲学研究中心的大力支持!衷心感谢大家对中国周易学会与《周易... 详细信息

尊敬的林安梧教授、各位专家学者、各位朋友:大家上午好!欢迎大家在百忙中来到山东大学参加当代儒学发展的省察与反思学术研讨会!衷心感谢大家对我们山东大学易学与中国古代哲学研究中心的大力支持!衷心感谢大家对中国周易学会与《周易研究》编辑部的大力支持!

关键词：当代儒学原创理论大道之源易学生生哲学繁星满天

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涉农高职教育服务农业强国建设:价值意蕴、现实困境与路径优化

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教育理论与实践 2024年第15期44卷 22-26页

作者：李上献温州科技职业学院教务处浙江温州325006

涉农高职教育在建设农业强国中的作用无可替代。近年国家出台了一些支持涉农职业教育发展的政策,但依然存在涉农高职教育难以得到社会认可、人才培养难以适应社会需求、科技创新与推广运用职能发挥不够充分等问题。涉农高职教育服务农... 详细信息

涉农高职教育在建设农业强国中的作用无可替代。近年国家出台了一些支持涉农职业教育发展的政策,但依然存在涉农高职教育难以得到社会认可、人才培养难以适应社会需求、科技创新与推广运用职能发挥不够充分等问题。涉农高职教育服务农业强国建设路径是,突出涉农高职教育的公益导向、建立“中职-高职-本科”培养体系、双向融通职业教育与农民培训、协同共驱农业科技创新与推广运用。只有如此,才能为农业强国建设注入涉农高职教育特有活力。

关键词：农业强国涉农高职教育纵向贯通横向融通育训结合科技创新

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