检索结果-南通市图书馆

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

A Composite Elastomer with Photo-responsive Shape Memory and Programmable Hygroscopic Actuation Functionalities

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第10期42卷 1470-1478,I0009页

作者： Xiang-Xi Cui li shang Zhong-Wen liu Zhao-Tie liu Jin-Qiang Jiang Guo li Key Laboratory of Syngas Conversion of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an710062China

Developing hydroscopic actuators with simultaneous high elasticity,shape programmability and tunable actuating behaviors are highly desired but still *** this study,we propose an orthogonal composite design to develop such a *** developed composite elastomer comprises carboxyl group-grafted polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene(SEBS-g-COOH)as the elastic substrate,and a synthesized azobenzene derivative as the functional filler(Azo12).By surface treatment using acidic and base solutions,the carboxyl groups on the surface can reversibly transform into carboxylate groups,which render the composite tunable hygroscopic actuating *** another aspect,the added filler undergoes trans-to-cis isomerization when exposed to UV light irradiation,leading to liquefaction of the crystalline aggregates formed by Azo12 *** liquefied Azo12 molecules can autonomously resotre their trans form and reform the crystalline *** reversible change in crystralline structure is utilized to realize the shape memory property,and 5 wt%of Azo12addition is adequate for the composite to exhibit photo-responsive shape memory behavior without compromising much of the *** regualtion of external geometry by shape memory effect is effective in altering the actuating *** proposed method can be extend to designing different composites with the demonstrated functionalities.

关键词： Actuator Shape memory Photo-responsive Hygroscopic responsive Azobenzene

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

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第10期67卷 2999-3010页

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&EngineeringShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China School of Economics&Management University of Chinese Academy of SciencesBeijing 100190China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Department of Earth System Science Tsinghua UnivesityBeijing 100084China

Carbon emission accounting is an important basis for global climate *** on the consumption-based accounting(CBA)method,the characteristics of carbon flow between national,regional,and product processes could be more clearly ***,CBA is more conducive to clarifying the attribution of responsibilities between producers and consumers,with the principles of fairness and *** 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 *** 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 *** emissions in China have shown a continuous growth trend from 1990 to 2019,but the pace has slowed down significantly over the last ***,the embodied carbon intensity of China’s exports continues to decline,indicating that China is providing more green and low-carbon products to the *** 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 *** 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.

关键词： Consumption-based accounting Production-based accounting Carbon transfer Carbon footprint

同方期刊数据库

Thermally modulated photoelectronic synaptic behavior in HfS_(2)/VO_(2) heterostructure

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第8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 UniversityShanghai 200241China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

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 HfS_(2)/VO_(2) heterojunction with a responsivity of8.6×10^(3) A·W^(-1)and a detectivity of 1.26×10^(14)Jones 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 VO_(2) converts from the semiconductor state to the metal state,the HfS_(2)/VO_(2) heterojunction transforms into a Schottky heterojunction from a TypeⅡheterojunction 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 HfS_(2)/VO_(2) heterojunction 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

Single-crystal supramolecular organic framework with super-adaptation

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2024年第17期69卷 2670-2674页

作者： Qiang li li-li Tan li shang State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Nature is unrivaled in its ability to create sophisticated architectures via hierarchical,precisely organized and ordered assembly of simple structural motifs[1].Adaptation is ubiquitous in living systems,inducing evolution toward more sophisticated architectures with atomic precision,which usually involve superadaptive changes of structure and function to maintain the normal operation of life systems[2,3].For instance,the super-adaptive transition of DNA from original structure to the nucleosome,superhelix or chromatin structure makes the volume shrinkage of 86%-99.9%,which is the key process to regulate DNA functions[4].Inspired by these delicate processes,scientists have devoted enormous efforts to mimicking the natural assembly process for developing advanced functional materials[5-7].

关键词： structure devoted maintain

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

在线全文

学校读者我要写书评

暂无评论

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

TSCompiler: efficient compilation framework for dynamic-shape models

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第10期67卷 67-84页

作者： Xiang LUO Chen ZHANG Chenbo GENG Yanzhi YI Jiahui HU Renwei ZHANG Zhen ZHANG Gianpietro CONSOLARO Fan YANG Tun LU Ning GU li shang School of Computer Science Fudan University School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University School of Computer Science and Technology Harbin Institute of Technology Huawei Technologies Co. Ltd. Huawei Paris Research Center School of Microelectronics Fudan University

Today's deep learning models face an increasing demand to handle dynamic shape tensors and computation whose shape information remains unknown at compile time and varies in a nearly infinite range at runtime. This shape dynamism brings tremendous challenges for existing compilation pipelines designed for static models which optimize tensor programs relying on exact shape values. This paper presents TSCompiler, an end-to-end compilation framework for dynamic shape models. TSCompiler first proposes a symbolic shape propagation algorithm to recover symbolic shape information at compile time to enable subsequent optimizations. TSCompiler then partitions the shape-annotated computation graph into multiple subgraphs and fine-tunes the backbone operators from the subgraph within a hardware-aligned search space to find a collection of high-performance schedules. TSCompiler can propagate the explored backbone schedule to other fusion groups within the same subgraph to generate a set of parameterized tensor programs for fused cases based on dependence analysis. At runtime, TSCompiler utilizes an occupancy-targeted cost model to select from pre-compiled tensor programs for varied tensor shapes. Extensive evaluations show that TSCompiler can achieve state-of-the-art speedups for dynamic shape models. For example, we can improve kernel efficiency by up to 3.97× on NVIDIA RTX3090, and 10.30× on NVIDIA A100 and achieve up to five orders of magnitude speedups on end-to-end latency.

关键词： machine learning tensor compilers dynamic shape operator fusion code generation auto-tuning

同方期刊数据库

践行全人类共同价值的现实基础——兼论“六大全球倡议”的重要意义

在线全文

学校读者我要写书评

暂无评论

毛泽东邓小平理论研究 2024年第6期 97-106,108页

作者：李尚宸华东政法大学马克思主义学院

全人类共同价值追求的是人们物质行动的直接产物,必然具备深厚的现实基础,在维护人类共同利益中体现人类公共价值追求与价值目标,在阶级解放中阐明人类共同价值愿景,指引人的解放的进程。社会意识具有相对独立性,全人类共同价值呈现“... 详细信息

全人类共同价值追求的是人们物质行动的直接产物,必然具备深厚的现实基础,在维护人类共同利益中体现人类公共价值追求与价值目标,在阶级解放中阐明人类共同价值愿景,指引人的解放的进程。社会意识具有相对独立性,全人类共同价值呈现“应然”与“实然”的张力,为落实与践行全人类共同价值,中国在“实然”情境下提出“六大全球倡议”,不断推动凝聚人类价值共识,这是现实层面的范例实践。当前推进实现全人类共同价值仍面临多重困境,对此,要在推行“六大全球倡议”基础上采取多维举措,将中国智慧有效转化为国际共识与国际行动,不断彰显中国能量与中国担当。

关键词：全人类共同价值六大全球倡议全球治理

在线全文

学校读者我要写书评

暂无评论

面向低重叠率点云匹配的多层级过滤网络

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

维普期刊数据库博看期刊