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Detection of maize leaf diseases using improved MobileNet V3-small

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International Journal of Agricultural and Biological Engineering 2023年第3期16卷 225-232页

作者： ang gao Aijun Geng Yuepeng Song Longlong Ren Yue Zhang Xiang Han College of Mechanical and Electrical Engineering Shandong Agricultural UniversityTai’an 271018ShandongChina Shandong Provincial Engineering Laboratory of Agricultural Equipment Intelligence Tai’an 271018ShandongChina Shandong Provincial Key Laboratory of Horticultural Machineries and Equipment Tai’an 271018ShandongChina

In order to realize the intelligent identification of maize leaf diseases for accurate prevention and control,this study proposed a maize disease detection method based on improved MobileNet V3-small,using a UAV to collect maize disease images and establish a maize disease dataset in a complex context,and explored the effects of data expansion and migration learning on model recognition accuracy,recall rate,and F1-score instructive evaluative indexes,and the results show that the two approaches of data expansion and migration learning effectively improved the accuracy of the *** structured compression of MobileNet V3-small bneck layer retains only 6 layers,the expansion multiplier of each layer was redesigned,32-fold fast downsampling was used in the first layer,and the location of the SE module was *** improved model had an average accuracy of 79.52%in the test set,a recall of 77.91%,an F1-score of 78.62%,a model size of 2.36 MB,and a single image detection speed of 9.02 *** detection accuracy and speed of the model can meet the requirements of mobile or embedded *** study provides technical support for realizing the intelligent detection of maize leaf diseases.

关键词： maize leaf disease image recognition model compression MobileNetV3-small

Flexible polydimethylsiloxane pressure sensor with micro-pyramid structures and embedded silver nanowires:A novel application in urinary flow measurement

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Nanotechnology and Precision Engineering 2024年第3期7卷 1-12页

作者： Ben-Song Wang ang gao Song-Wei Huang Qi-Hong Ning Cheng Zhou Qi-Xiang Song Da-XiangCui School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Urology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200240China

Flexible pressure sensors are lightweight and highly sensitive,making them suitable for use in small portable devices to achieve precise measurements of tiny *** article introduces a low-cost and easy-fabrication strategy for piezoresistive flexible pressure *** embedding silver nanowires into a polydimethylsiloxane layer with micro-pyramids on its surface,a flexible pressure sensor is created that can detect low pressure (17.3 Pa) with fast response (<20 ms) and high sensitivity (69.6 mA kPa-1).Furthermore,the pressure sensor exhibits a sensitive and stable response to a small amount of water flowing on its *** this basis,the flexible pressure sensor is innovatively combined with a micro-rotor to fabricate a novel urinary flow-rate meter (uroflowmeter),and results from a simulated human urination experiment show that the uroflowmeter accurately captured all the essential shape characteristics that were present in the pump-simulated urination *** ahead,this research provides a new reference for using flexible pressure sensors in urinary flow-rate monitoring.

关键词： Flexible pressure sensor Silver nanowires Portable device Uroﬂowmeter Healthcare

Ultrahigh-performance planar β-Ga2O3 solar-blind Schottky photodiode detectors

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Science China(Technological Sciences) 2021年第1期64卷 59-64页

作者： LIU Zeng ZHI YuSong ZHang ShaoHui LI Shan YAN ZuYong gao ang ZHang ShiYu GUO DaoYou Wang Jun WU ZhenPing LI PeiGang Tang WeiHua Laboratory of Information Functional Materials and Devices School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China Division of Interdisciplinary and Comprehensive Research&Platform for Characterization and Test Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Center for Optoelectronics Materials and Devices&Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China China Telecom Huzhou Branch Huzhou 313000China

The low dark current, high responsivity and high specific detectivity could be preferably achieved in detectors based on junctions, owing to the efficient constraint of carriers. Compared with the other junctions, planar Schottky junctions have simple structures and technological demands and are easy integrated. Herein, in this work, we prepared the β-Ga_(2)O_(3) thin film by metalorganic chemical vapor deposition method to construct planar Ti/β-Ga2O3/Ni Schottky photodiode detectors with different onstate resistances. Fortunately, all the devices exhibit state-of-the-art performances, such as responsivity of 175–1372 A W^(-1),specific detectivity of 10^(14) Jones and external quantum efficiency of 85700%–671500%. In addition, the dependences of device performances on the on-state resistances indicate that the higher dark currents, photocurrents and photoresponsivities may well be obtained when on-state resistance is smaller, due to the less external power is used to overcome the impendence and condensance at the Ti/β-Ga_(2)O_(3) and Ni/β-Ga_(2)O_(3) interfaces, but contributing to higher electric current flow both in the dark and under illuminations.

关键词： β-Ga2O3 Schotttky photodiode solar-blind device scale on-state resistance

Visible-Light-Responsive Crystalline Solids by Equipping Covalent Organic Frameworks with Donor-Acceptor Stenhouse Adducts

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Chinese Journal of Chemistry 2023年第19期41卷 2469-2475页

作者： Yongli Duan Fanxi Sun ang gao Zhen Wang Xiaoyu Xiong Lijun Mao Bo Han Chao He Xu Deng Yonghao Zheng Dongsheng Wang School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengduSichuan610054 China State Key Laboratory of Southwestern Chinese Medicine Resources School of PharmacyChengdu University of Traditional Chinese MedicineChengduSichuan610041 China College of Polymer Science and Engineering Sichuan UniversityChengduSichuan610065 China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduSichuan610054 China Institute of Electronic and Information Engineering of UESTC in Guangdong DongguanGuangdong523808 China

Controlling properties of crystalline solids by light remains a challenge because the lack of intrinsic structural flexibility limits the necessary molecular mobility for photoisomerization. In this work, we reported a series of visible-light-responsive covalent organic frameworks (COFs) by introducing donor-acceptor Stenhouse adducts (DASAs) with various electron-withdrawing moieties via a post-modified strategy. The DASAs-functionalized COFs exhibit distorted honeycomb layered topology with long-range periodicity. The DASAs grafted on the skeletons are pointing into the nanopores of COFs, which weakens intermolecular aggregation and ensures sufficient free volume to undergo reversible isomerization between linear and cyclic states. Furthermore, the crystalline and optical properties of COFs as well as the geometrical size and hydrophilicity inside the nanopores were reversibly controlled by alternating visible light irradiation and heat. Finally, methyl violet was used as the cargo molecules to be immobilized into the nanopores of COFs, which showed fast release under controlling of visible light.

关键词： Covalent organic frameworks Donor-acceptor stenhouse adducts Photoresponsive Crystalline solids Cargo release lsomerization

Rational multivalency construction enables bactericidal effect amplification and dynamic biomaterial design

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The Innovation 2023年第5期4卷 59-68页

作者： Xu Chen Xinrui Li Wenbo He Miao Wang ang gao Liping Tong Shun Guo Huaiyu Wang Guoqing Pan Institute for Advanced Materials School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China Institute of Biomedicine and Biotechnology Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

The multivalency of bioligands in living systems brings inspiration for not only the discovery of biological mechanisms but also the design of extracellular matrix(ECM)-mimicking ***,designing controllable multivalency construction strategies is still ***,we synthesized a series of well-defined multivalent antimicrobial peptide polymers(mAMPs)by clicking ligand molecules onto polymers prepared by reversible addition-fragmentation chain transfer *** multiple cationic ligands in the mAMPs could enhance the local disturbance of the anionic phospholipid layer of the bacterial membrane through multivalent binding,leading to amplification of the bactericidal *** addition to multivalency-enhanced antibacterial activity,mAMPs also enable multivalency-assisted hydrogel fabrication with an ECM-like dynamic *** resultant hydrogel with self-healing and injectable properties could be successfully employed as an antibacterial biomaterial scaffold to treat infected skin *** multivalency construction strategy presented in this work provides new ideas for the biomimetic design of highly active and dynamic biomaterials for tissue repair and regeneration.

关键词： healing enable dynamic

Targeting tumour-osteoclast interactions:a trigger-explosion system to combat bone metastasis

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Biomaterials Translational 2024年第3期5卷 328-330页

作者： ang gao Huaiyu Wang Center for Human Tissues and Organs Degeneration Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina

Cancer remains one of the leading causes of death worldwide,and tumour metastasis is responsible for more than 90%of cancer deaths.1,2 Bone is recognised as the most common site for metastasis of numerous malignancies,especially breast and prostate cancer.3,4 As a highly dynamic compartment,the bone microenvironment not only facilitates primary metastasis but also enhances secondary metastasis to organs,such as the brain,liver,and lung,liver,and brain.5-7 Therefore,effectively preventing critical bone metastasis is pivotal for impeding systemic tumour spread.

关键词： metastasis organs death

Second-harmonic generation using d(33)in periodically poled lithium niobate microdisk resonators

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Photonics Research 2020年第3期8卷 311-317页

作者： ZHENZHONG HAO LI ZHang WENBO MAO ang gao XIAOMEI gao FENG gao Fang BO GUOQUAN ZHang JINGJUN XU MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Institute of Applied Physics and School of PhysicsNankai UniversityTianjin 300457China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

A fabrication process allowing for the production of periodically poled lithium niobate(PPLN)photonic devices with any domain pattern and unit size down to 200 nm is developed by combining semiconductor fabrication techniques and piezo-force-microscopy tips *** on this fabrication process,PPLN microdisk resonators with quality factors of 8×10~4 were fabricated from a Z-cut lithium niobate ***-harmonic generation(SHG)utilizing d(33)in the whole cavity was demonstrated in a PPLN microdisk with a 2μm-spatialperiod radial domain *** SHG conversion efficiency was measured to be 1.44×10^(-5)m W^(-1).This work paves the way to fabricate complex PPLN photonic devices and to obtain efficient nonlinear optical effects that have wide applications in both classical and quantum optics.

关键词： lithium harmonic niobate

Dectin-1 expression at early period of Aspergillus fumigatus infection in rat's corneal epithelium

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International Journal of Ophthalmology(English edition) 2013年第1期6卷 30-33页

作者： Cheng-Ye Che Cui Li ang gao Jing Lin Li-Li Zhang Qiang Xu Qian Wang Gui-Qiu Zhao Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University Department of Clinical Medicine Medical College Qingdao University

AIM:To investigate the expression of dendritic cell-associated C-type lectin-1 (dectin-1) at the early period of Aspergillus fumigatus infection in rat’s corneal epithelium. ·METHODS:A total of 72 Wistar rats were randomly divided into three groups:A, B and C. The right eyes were chosen as experimental eyes. Group A was control group. Rats in group B were not inoculated with Aspergillus fumigatus. Group C was taken as Aspergillus fumigatus keratitis model. Rats in group B and C (six from each group) were executed randomly at 4, 8, 16 and 24 hours after experimental model being established to assess the expression of dectin-1 mRNA through real-time PCR. Another six rats in group B and C were executed randomly at 24 hours to assess the expression of dectin-1 protein through immunohistochemistry. ·RESULTS:The results of real-time PCR indicated that dectin-1 mRNA expression was low in corneal epithelium of normal rats’. There was no significantly difference of dectin-1 mRNA expression in group A and B (P >0.05). The expression of Aspergillus fumigatus infected corneal epithelium increased gradually after 8 hours in group C. The synchronous expression of group A and C had significant difference (P <0.01). Immunohistochemisty discovered that dectin-1 receptor existed in normal rat’s corneal epithelium . Dectin-1 protein increased after 24 hours in group C. There was a significant difference of synchronous expression in group B and C(P<0.01). · CONCLUSION:Dectin-1 exists in rat’s cornealepithelium and its expression significantly increases at the early period of Aspergillus fumigatus infection. Dectin-1 is a pattern recognition receptor that expresses in corneal epithelium and involves in immune response to Aspergillus fungal keratitis.

关键词： keratitis Aspergillus fumigatus dectin-1 rat

Cationic ordering transition in oxygen-redox layered oxide cathodes

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Carbon Energy 2024年第1期6卷 197-206页

作者： Xinyan Li ang gao Qinghua Zhang Hao Yu Pengxiang Ji Dongdong Xiao Xuefeng Wang Dong Su Xiaohui Rong Xiqian Yu Hong Li Yong-Sheng Hu Lin Gu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijingChina College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijingChina Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials School of Materials Science and EngineeringTsinghua UniversityBeijingChina Beijing Advanced Innovation Center for Materials Genome Engineering Huairou DivisionInstitute of PhysicsChinese Academy of SciencesBeijingChina

Understanding the structural origin of the competition between oxygen 2p and transition-metal 3d orbitals in oxygen-redox(OR)layered oxides is eminently desirable for exploring reversible and high-energy-density Li/Na-ion ***,we reveal the correlation between cationic ordering transition and OR degradation in ribbon-ordered P3-Na_(0.6)Li_(0.2)Mn_(0.8)O_(2) via in situ structural *** two different voltage windows,the OR capacity can be improved approximately twofold when suppressing the in-plane cationic ordering *** find that the intralayer cationic migration is promoted by electrochemical reduction from Mn^(4+)to Jahn–Teller Mn^(3+)and the concomitant NaO_(6) stacking transformation from triangular prisms to octahedra,resulting in the loss of ribbon ordering and electrochemical ***-principles calculations reveal that Mn^(4+)/Mn^(3+)charge ordering and alignment of the degenerate eg orbital induce lattice-level collective Jahn–Teller distortion,which favors intralayer Mn-ion migration and thereby accelerates OR *** findings unravel the relationship between in-plane cationic ordering and OR reversibility and highlight the importance of superstructure protection for the rational design of reversible OR-active layered oxide cathodes.

关键词： cationic ordering layered oxide cathodes oxygen redox sodium-ion batteries