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Built-in electric field intensified by photothermoelectric effect drives charge separation over Z-scheme 3D/2D In_(2)Se_(3)/PCN heterojunction for high-efficiency photocatalytic CO_(2) reduction

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Journal of Materials Science & Technology 2024年第12期179卷 251-261页

作者： Hongjun Dong Lei Tong Pingfan Zhang Daqiang Zhu Jizhou jiang chunmei Li Institute of Green Chemistry and Chemical Technology School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China School of Environmental Ecology and Biological Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China

It is a challenging issue to further drive charge separation through the oriented design of Z-scheme het-erojunction in the exploitation of cost-effective photocatalytic *** this contribution,the unique Z-scheme 3D/2D In_(2)Se_(3)/PCN heterojunction is developed through implanting In_(2)Se_(3) microspheres on PCN nanosheets using an in situ growth technique,which acquires the effective CO generation activity from photocatalytic CO_(2) reduction(CO_(2)R).The CO yield of 4 h in the CO_(2)R reaction over the optimal In_(2)Se_(3)/PCN-15 sample reaches up to 11.40 and 2.41 times higher than that of individual PCN and In_(2)Se_(3),*** greatly enhanced photocatalytic performance is primarily the improvement of photo-generated carrier separation *** be more specific,the formed built-in electric field is signifi-cantly intensified by producing the temperature difference potential between In_(2)Se_(3) and PCN owing to the photothermoelectric effect of In_(2)Se_(3),which actuates the high-efficiency separation of photogenerated charge carriers along the Z-scheme transfer path in the In_(2)Se_(3)/PCN *** effective strat-egy of enhancing the built-in electric field to drive photogenerated charge separation proposed in this work opens up an innovative avenue to design Z-scheme heterojunction applied to high-efficiency pho-tocatalytic reactions,such as hydrogen generation from water splitting,CO_(2)R,and degradation of organic pollutants.

关键词： In_(2)Se_(3)/PCN Z-scheme heterojunction Photocatalytic CO_(2) reduction Enhanced built-in electric field Photothermoelectric effect

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CBCT对不同类型根折的诊断效果评价

临床医学工程 2012年第12期19卷 2083-2084页

作者：马骏驰朱庆萍蒋春梅胡建孙超南京医科大学口腔医学研究所南京医科大学附属口腔医院江苏南京210029

目的对比研究锥束CT(CBCT)与根尖片对不同类型根折的诊断效果。方法 60颗新鲜拔除的牙齿随机分为3组,水平根折组及纵向根折组人为造成折裂后粘合固定,对照组不做任何处理。分别放入离体下颌骨的牙槽窝中,采用CBCT扫描及数字化根尖片拍... 详细信息

目的对比研究锥束CT(CBCT)与根尖片对不同类型根折的诊断效果。方法 60颗新鲜拔除的牙齿随机分为3组,水平根折组及纵向根折组人为造成折裂后粘合固定,对照组不做任何处理。分别放入离体下颌骨的牙槽窝中,采用CBCT扫描及数字化根尖片拍照。由两名放射医师及一名牙体牙髓医师读片,判断有无根折。比较观测结果的准确率并进行统计学检验。结果水平根折组:CBCT扫描及数字化根尖片无显著性差异;纵向根折组:CBCT扫描的检出率高于数字化根尖片,结果有显著性差异。结论 CBCT与数字化根尖片比较,在诊断牙齿纵向根折中有明显的优势。

关键词：锥束CT 数字化根尖片根折

Organic matter extracted from activated sludge with ammonium hydroxide and its characterization

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Journal of Environmental Sciences 2010年第5期22卷 641-647页

作者： Liangliang Wei Kun Wang Qingliang Zhao Junqiu jiang chunmei Xie Wei Qiu School of Municipal & Environmental Engineering Harbin Institute of Technology Harbin 150090 China State Key Laboratory of Urban Water Resources and Environment Harbin Institute of Technology Harbin 150090 China

In order to characterize the organic properties of waste activated sludge in a wastewater treatment plant,organic matter within sludge was extracted with NH 3 ·H 2 O preferentially,and subsequently fractionated into five fractions using XAD-8/XAD-4 *** to a 63.8%-71.1% of organic matter within the sludge could be efficiently extracted by NH 3 ·H 2 *** results showed that hydrophobic acid and hydrophilic fraction were two main components among the sludge organic matter （accounting for 32.2% and 48.0% of the bulk organic matter,respectively）,whereas transphilic acid,hydrophobic neutral and transphilic neutral were quite low （accounting for 9.2%,5.8% and 4.8%,respectively）.Despite that the extractant of NH 3 ·H 2 O showed a relatively higher extraction efficiency of the aromatic components,the relatively low aromaticity of the organic fractions implied that those non-aromatic components could also be effectively extracted,especially for neutral and hydrophilic *** addition,acidic fractions contained more aromatic humic-like components,whereas the neutral fractions had a greater content of aromatic proteins and soluble microbial byproduct-like *** of sludge organics with NH3·H2O and subsequential fractionation using XAD resins could be a novel method for further characterization of sludge organics.

关键词： sludge organic matter extraction fractionation characterization

Identification of Antarctic minke and killer whales with passive acoustic monitoring in Prydz Bay, Antarctica

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Journal of Oceanology and Limnology 2022年第2期40卷 485-495页

作者： Ying jiang Lian-Gang LÜ Zongwei LIU chunmei YANG Jingsong GUO First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural ResourcesQingdao 266061China

Although four species of odontocete and four species of baleen whale have been recorded in Prydz Bay,their vocalizations have been rarely *** vocalizations were recorded during March 2017 in Prydz Bay,***-duck sounds,downsweeps,inverted“u”shape signals,whistles,pulsed sounds,and broadband clicks were ***-duck sounds and downsweeps were associated with Antarctic minke whales(Balaenoptera bonaerensis)based on visual *** between inverted“u”shape signals,biphonic calls,and clicks with vocalizations previously described for killer whales(Orcinus orca)lead us believe the presence of Antarctic killer *** to sound structures,signal characteristics,and recording location,Antarctic type C killer whales were the most probable candidates to produce these detected *** represent the fi rst detection of inverted“u”shape signals in Antarctic waters,and the fi rst report of Antarctic killer whale in Prydz Bay based on passive acoustic *** co-existence of Antarctic minke and killer whales may imply that minke whales can detect diff erences between the sounds of mammal-eating and fi sh-eating killer *** descriptions of these underwater vocalizations contribute to the limited body of information regarding the distribution and acoustic behavior of cetaceans in Prydz Bay.

关键词： passive acoustic monitoring inverted“u”shaped signal killer whale Antarctic minke whales Prydz Bay type C

A multi-functional polymer coating that is heat-resistant,hydrophobic and transparent

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Particuology 2014年第6期12卷 11-14页

作者： Tianyi Zhao Dongmei Zhang chunmei Ding Jinglun Zhou Jinsong Zhu Lei jiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and EnvironmentBeihang University National Center for Nanoscience and Nanotechnology Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences

A multi-functional polymer film with high hydrophobicity and transparency was formed by simple casting of a polycarbonate solution onto a substrate having micro-scale *** high hydrophobicity was heat-resistant,which can be retained up to 390 ℃.The polymer film may have potentially wide-ranging applications in industry and high technology.

关键词： Wettability Heat-resistance Superhydrophobic Micro-/nano-structure

Controllable resistive switching of STO:Ag/SiO2-based memristor synapse for neuromorphic computing

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Journal of Materials Science & Technology 2022年第2期97卷 254-263页

作者： Nasir Ilyas Jingyong Wang chunmei Li Hao Fu Dongyang Li Xiangdong jiang Deen Gu Yadong jiang Wei Li School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

Resistive random-access memory(RRAM)is a promising technology to develop nonvolatile memory and artificial synaptic devices for brain-inspired neuromorphic ***,we have developed a STO:Ag/SiO_(2) bilayer based memristor that has exhibited a filamentary resistive switching with stable endurance and long-term data retention *** memristor also exhibits a tunable resistance modulation under positive and negative pulse trains,which could fully mimic the potentiation and depression behavior like a *** synaptic plasticity functions,including long-term potentiation(LTP)and long-term depression(LTD),paired-pulsed facilitation(PPF),spike-rate-dependent-plasticity(SRDP),and post-tetanic potentiation(PTP),are faithfully implemented with the fabricated ***,to demonstrate the feasibility of our memristor synapse for neuromorphic applications,spike-timedependent plasticity(STDP)is also *** on conductive atomic force microscopy observations and electrical transport model analyses,it can be concluded that it is the controlled formation and rupture of Ag filaments that are responsible for the resistive switching while exhibiting a switching ratio of~10;along with a good endurance and stability suitable for nonvolatile memory *** fully electroforming,the gradual conductance modulation of Ag/STO:Ag/SiO_(2)/p^(++)-Si memristor can be realized,and the working mechanism could be explained by the succeeding growth and contraction of Ag filaments promoted by a redox *** newly fabricated memristor may enable the development of nonvolatile memory and realize controllable resistance/weight modulation when applied as an artificial synapse for neuromorphic computing.

关键词： Ag/STO:Ag/SiO2/p++-Si memristor Filamentary resistive switching Resistance/weight modulation Synaptic plasticity Normomorphic computing

Individual automatic detection and identification of big cats with the combination of different body parts

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Integrative Zoology 2023年第1期18卷 157-168页

作者： chunmei SHI Jing XU Nathan James ROBERTS Dan LIU Guangshun jiang College of Mathematics and Computer Science Zhejiang Agriculture and Forestry UniversityHangzhouChina Department of Mathematics School of ScienceNortheast Forestry UniversityHarbinChina Feline Research Center National Forestry and Grassland AdministrationCollege of Wildlife and Protected AreasNortheast Forestry UniversityHarbinChina Siberian Tiger Park HarbinChina

The development of facial recognition technology has become an increasingly powerful tool in wild animal indi-vidual *** this paper,we develop an automatic detection and recognition method with the combinations of body features of big cats based on the deep convolutional neural network(CNN).We collected dataset including 12244 images from 47 individual Amur tigers(Panthera tigris altaica)at the Siberian Tiger Park by mobile phones and digital camera and 1940 images and videos of 12 individual wild Amur leopard(Panthera pardus orientalis)by infrared ***,the single shot multibox detector algorithm is used to perform the automatic detection process of feature regions in each *** the different feature regions of the image,like face stripe or spots,CNNs and multi-layer perceptron models were applied to automatically identify tiger and leopard individuals,*** results show that the identiﬁcation accuracy of Amur tiger can reach up to 93.27%for face front,93.33%for right body stripe,and 93.46%for left body ***,the combination of right face,left body stripe,and right body stripe achieves the highest accuracy rate,up to 95.55%.Consequently,the combination of different body parts can improve the individual identiﬁcation ***,it is not the higher the number of body parts,the higher the accuracy *** combination model with 3 body parts has the highest *** identiﬁcation accuracy of Amur leopard can reach up to 86.90%for face front,89.13%for left body spots,and 88.33%for right body *** accuracy of different body parts combination is lower than the independent *** wild Amur leopard,the combination of face with body spot part is not helpful for the improvement of identiﬁcation *** most effective identiﬁcation part is still the independent left or right body spot *** can be applied in long-term monitoring of big cats,including big data analysis for animal behavior,and be helpful

关键词： combination of body parts individual automatic identiﬁcation object detection Panthera pardus orientalis Panthera tigris altaica