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Food Quality and Safety 2022年第2期6卷 265-274页

作者： Yang Cao Chaoyi Shen Zhichao Yang Zihan Cai zian deng Di Wu The Rural Development Academy Zhejiang UniversityHangzhouChina College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhouChina College of Agriculture&Biotechnology Zhejiang UniversityHangzhouChina and Zhejiang University Zhongyuan Institute ZhengzhouChina

Study on the application of nanofibers in food active packaging has been a research hotspot in recent *** this work,solution blow spinning(SBS)was applied to rapidly fabricate the polycaprolactone(PCL),polyvinyl pyrrolidone(PVP),and PCL/PVP nanofibrous films to encapsulate chlorogenic acid(CGA).All films showed uniform and smooth nanofibers,and the Fourier transform infrared spectroscopy and X-ray diffraction proved the success of mixed spinning of PCL and *** the increase of PVP content,the thermal stability of the PCL/PVP nanofibrous films *** PCL/PVP(weight ratio of 4:1)film possessed better mechanical properties than PCL and PVP films be-cause of the stronger fiber-fiber *** addition of PCL endowed the hydrophobic surfaces to the PCL/PVP films,and the PCL/PVP films had better water vapor barrier *** PCL/PVP(4:1)film exhibited the best long-term continuous release of CGA during 72 *** PVP nanofibrous film exhibited no inhibition against Staphylococcus aureus and Escherichia coli due to the low encapsulation efficiency,but the PCL and PCL/PVP films exhibited good antimicrobial *** above results suggested that the nanofibrous fims developed by SBS possess promising prospects in food packaging.

关键词： Solution blow spinning polycaprolactone polvinyl prrolidone chlorogenic acid long-term continuous release

Electric Field Measurement and Application Based on Rydberg Atoms

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Electromagnetic Science 2023年第2期1卷 38-53页

作者： Bang Liu Lihua Zhang Zongkai Liu zian deng Dongsheng Ding Baosen Shi Guangcan Guo Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Microwave sensing offers important applications in areas such as data communication and remote *** has thus received much attention from academia,industry,and *** wireless sensing uses the strong response of the large electric dipole moment of a Rydberg atom in response to an external field to achieve precise measurement of a radio frequency(RF)*** method offers advantages over traditional wireless sensing including ultrawide energy level transitions,which makes it responsive to RF electric fields over a wide ***,we briefly review the progress of electric field measurement based on Rydberg *** discuss the properties of Rydberg atoms,measurement using Rydberg atoms,experimental progress in electric field measurement of different bands,and different methods for detecting electric fields(such as atomic superheterodyne,machine learning,and critically enhanced measurement).The development of Rydberg atomic measurement focuses on the advantages of Rydberg atomic sensing,especially when compared to conventional microwave *** work is of major significance to developing Rydberg-based measurements in astronomy,remote sensing,and other fields.

关键词： Rydberg atoms Microwave sensing Atomic transition Machine learning

等离子体活化水喷淋及浸泡处理的生菜采后品质变化分析

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现代食品科技 2024年第2期40卷 149-159页

作者：邓子安吴清燕江风郑丹丹李江阔牟文良吴迪孙崇德陈昆松浙江大学农业与生物技术学院浙江杭州310058 浙江大学中原研究院河南郑州450000 国家农产品保鲜工程技术研究中心(天津) 农业农村部农产品贮藏保鲜重点实验室天津市农产品采后生理与贮藏保鲜重点实验室天津300384 山东奥维特生物科技有限公司山东济南251400 山东营养源食品科技有限公司山东济南251400

目前基于PAW的果蔬采后品质研究主要采用浸泡处理,较少涉及喷淋处理。该文分别采用PAW喷淋和浸泡对生菜进行处理,并研究了处理后生菜表面菌落总数、失重率、颜色、叶绿素及代谢物的变化。结果显示,PAW喷淋和浸泡处理后生菜表面的菌落总... 详细信息

目前基于PAW的果蔬采后品质研究主要采用浸泡处理,较少涉及喷淋处理。该文分别采用PAW喷淋和浸泡对生菜进行处理,并研究了处理后生菜表面菌落总数、失重率、颜色、叶绿素及代谢物的变化。结果显示,PAW喷淋和浸泡处理后生菜表面的菌落总数分别下降1.54和2.82 lg CFU/g(P<0.05),并且PAW喷淋较浸泡处理对生菜失重率和叶绿素的影响较小。代谢组分析表明,PAW喷淋处理组的生菜与对照组相比能维持含量更多的黄酮类物质,而PAW浸泡处理组的生菜与对照组相比膜脂代谢活跃。综上,PAW喷淋处理后在贮藏前期可以有效降低生菜表面菌落总数,并且能够在贮藏期间较好地维持生菜品质。

关键词：等离子体活化水生菜杀菌品质代谢组学

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The Four Arithmetic Operations for Handwritten Digit Recognition Based On Convolutional Neural Network

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The Four Arithmetic Operations for Handwritten Digit Recogni...

Crystal growth and spectral properties of Tb：Lu2O3

第三十九届中国控制会议

作者： Kecheng Wang Junwen deng Linfeng Xu Cong Tang zian Pei Hongtao Wang Faculty of Intelligent Manufacturing Wuyi University

The deep learning networks has become an active area in the realm of machine learning in recent years and some relevant models such as convolutional neural network（CNN） models have a good performance in handwritten character recognition. The MNIST is a typical open source data set, which only has ten kinds of handwritten digital characters from 0 to ***, the majority of the open source data sets in the current literature exclude arithmetic operators of "+", "-", "×","÷", "=". In order to address this issue, firstly, we established a data sets of 22,200 characters, which includes fifteen ***, for each category, 1,200 characters is used for training and 280 characters is used for testing respectively. Secondly,we proposed a deep learning networks algorithm for characters recognition based on CNN. Thirdly, as an application, we further implemented four arithmetic operation using the recognized characters. The experimental results demonstrate that the proposed deep learning networks algorithm has shown strong ability for feature extraction and classification with the average accuracy of97.42 %. More meaningfully, the four arithmetic operation in the present work has strong robustness and the potential applied value.

关键词： Convolutional Neural Network Handwritten Character Recognition Four Arithmetic Operations

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Chinese Physics B 2018年第9期27卷 590-594页

作者： Jiaojiao Shi Bin Liu Qingguo Wang Huili Tang Feng Wu Dongzhen Li Hengyu Zhao Zhanshan Wangl, Wen deng zian Xu Jiayue Xu Xiaodong Xu Jun Xu School of Physics Science and Engineering Institute for Advanced StudyTongji UniversityShanghm 200092China MOE Key Laboratory of Advanced Micro-Structure Materials Shanghai 201899China Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic EngineeringYiangsu Normal UniversityXuzhou 221116China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China School of Physical Science and Technology Ouangxi UniversityNanning 530004China Institute of Crystal Growth School of Materials Science and EngineeringShanghai Institute of TechnologyShanghai 201418China Shanghai Engineering Research Center for Sapphire Crystals Shanghai 201899China

The crystal growth,x-ray diffraction pattern,absorption spectrum,emission spectrum,and fluorescence lifetime of a Tb：Lu2O3 single crystal were *** at 483 nm,the peak absorption cross-section was calculated to be 3.5×10（-22）cm2,and the full width at half maximum was found to be 2.85 *** Judd-Ofelt（J-O）intensity parameters 2,4,and 6 were computed to be 3.79×10（-20）cm2,1.30×10（-20）cm2,and 1.08×10（-20）cm2,with a spectroscopic quality factor 4/6 being *** emission cross-sections of green emission around 543 nm and yellow emission around 584 nm were calculated to be 9.43×10（-22）cm2 and 1.32×10（-22）cm2,*** fluorescence lifetimeτexp of -5D4 was fitted to be 1.13 *** data suggest that the Tb：Lu2O3 crystal could be a potential candidate for green and yellow laser operation.

关键词： fluorescence spectra laser materials excited states

The impact of toroidal mode coupling on high-density discharges in J-TEXT

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Plasma Science and Technology 2024年第12期26卷 1-8页

作者： Peng deng Wenzhe MAO Zhipeng CHEN Yinan ZHOU Peng SHI Zhoujun YANG Li GAO Tao LAN Jinlin XIE Hong LI zian WEI Adi LIU Chu ZHOU Weixing DING Wandong LIU Ge ZHUANG School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026People’s Republic of China State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma PhysicsSchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China

Density limit has long been a widely studied issue influencing the operating range of *** rapid growth of the m/n=2/1(where m and n are poloidal and toroidal mode numbers,respectively)tearing mode is generally regarded as a primary precursor to the density limit *** this experiment,the coupling of the m/n=1/1 mode and the m/n=2/1 mode in highdensity plasma was *** a sawtooth cycle,the frequencies of the two modes gradually converge until they become *** that,toroidal coupling occurs between the 1/1 and 2/1 modes,resulting in a mutually fixed phase *** the occurrence of toroidal coupling,the 2/1 mode is *** to the disruption,the cessation of the 1/1 and 2/1 mode coupling,along with the rapid growth in the amplitude of the 2/1 mode,can be ***,under the same parameters,comparing discharges with or without the 1/1 mode,it is found that the presence of the 1/1 mode leads to higher plasma density and temperature parameters.

关键词： toroidal coupling tearing mode density limit sawtooth

Fast radial scanning probe system on KTX

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Plasma Science and Technology 2020年第4期22卷 97-104页

作者： Tijian deng Tao LAN Mingsheng TAN Junfeng ZHU Jie WU Hangqi XU Chen CHEN Yolbarsop ADIL Sen ZHANG Jiaren WU Yiming ZU Wenzhe MAO Hong LI Jinlin Xie Ahdi LIU Zixi LIU Zhengwei WU Hai WANG Xiaohui WEN Haiyang ZHOU zian WEI Chijin XIAO Weixing DING Ge ZHUANG Wandong LIU KTX Laboratory and Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026People's Republic of China Plasma Physics Laboratory University of SaskatchewanSaskatoonSK S7N 5E2Canada

A fast radial scanning probe system was constructed for the Keda Torus eXperiment(KTX)to measure the profiles of boundary plasma parameters such as floating potential,electron density,temperature,transport fluxes,*** scanning probe system is driven by slow and fast motion mechanisms,corresponding to the stand-by movement of a stepping motor and the fast scanning movement of a high-torque servo-motor,*** fast scanning,the scanner drives the probe radially up to 20 cm at a maximum velocity of 4.0 m s-1.A noncontact magnetic grating ruler with a high spatial resolution of 5μm is used for the displacement *** scanning probe can reach the center of plasmas *** comparison of plasma floating potential profiles obtained by a fixed radial rake probe and the single scanning probe suggests that the high-speed scanning probe system is reliable for measuring edge plasma parameter profiles on the KTX device.

关键词： radial scanning probe high-speed movement noncontact magnetic grating ruler

ZSM-5分子筛对C_(6)F_(12)O/CO_(2)混合气体及其过热分解产物吸附性能研究

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工程科学与技术 2023年第4期55卷 57-66页

作者：田双双王家浩袁子安张晓星靳小平刘伟豪邓广宇湖北工业大学新能源及电网装备安全监测湖北省工程研究中心湖北武汉430068 襄阳湖北工业大学产业研究院湖北襄阳441100

目前,C_(6)F_(12)O环保绝缘介质已在气体开关柜中得到应用,选择合适的多孔材料对C_(6)F_(12)O混合气体分解产物吸附处理,既能保证开关柜的稳定运行,也可为大力推广C_(6)F_(12)O环保气体开关柜的应用提供安全保障。本文通过气体吸附实验... 详细信息

目前,C_(6)F_(12)O环保绝缘介质已在气体开关柜中得到应用,选择合适的多孔材料对C_(6)F_(12)O混合气体分解产物吸附处理,既能保证开关柜的稳定运行,也可为大力推广C_(6)F_(12)O环保气体开关柜的应用提供安全保障。本文通过气体吸附实验探究ZSM-5分子筛对C_(6)F_(12)O/CO_(2)混合气体模拟过热故障后分解产物的吸附性能及对两种主要绝缘介质C_(6)F_(12)O/CO_(2)浓度的影响;同时,基于分子动力学仿真模拟吸附过程,计算浓度分布函数、径向分布函数、扩散系数等动力学参数以厘清吸附机理。实验结果表明:模拟过热故障后C_(6)F_(12)O/CO_(2)混合气体的主要分解产物为C_2F_6、C_3F_8、C_4F_(10)、C_3F_6、C_3F_7H、C_5F_(12)和C_6F_(14)。ZSM-5分子筛对大部分分解产物都有吸附作用,对C_3F_8、C_4F_(10)、C_3F_7H这3种分解气体吸附性能优异,吸附率均超过80%;对C_2F_6、C_3F_6分解气体有一定的吸附能力,但吸附效果不明显;对C_5F_(12)、C_6F_(14)分解气体基本不吸附。实验前主绝缘介质C_6F_(12)O、CO_(2)浓度较高,ZSM-5分子筛对其浓度影响较小,实验后吸附率分别为1.77%和0.25%。理论计算结果表明:ZSM-5分子筛能够很好地吸附动力学直径与自身孔径相当的气体分子(C_2F_6、C_3F_8、C4F1_0、C_3F_6、C_3F_7H),对于体积过小或过大的气体分子(CO_(2)、CF_4、C5F1_2、C6F1_2O、C_6F_(14))吸附作用不明显。ZSM-5分子筛可用于C_(6)F_(12)O环保绝缘气体开关柜中对分解产物进行吸附处理,以保证设备安全稳定运行;同时,为相关电力防护设备中过滤材料的选择提供参考。

关键词： C_(6)F_(12)O/CO_(2)混合气体过热分解产物 ZSM-5分子筛吸附实验分子动力学模拟