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Classification of weed seeds based on visual images and deep learning

Information Processing in Agriculture 2023年第1期10卷 40-51页

作者： Tongyun Luo Jianye Zhao Yujuan gu Shuo Zhang xi Qiao Wen Tian Yangchun Han College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100PR China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120PR China Qingdao China-Agri IOT Science&Technology Co.Ltd. Qingdao 266106PR China guangzhou Customs Districk Technology Center Guangzhou 510623PR China Jiangyin Customs Jiangyin 214400PR China

Weeds are mainly spread by weed seeds being mixed with agricultural and forestry crop seeds,grain,animal hair,and other plant products,and disturb the growing environment of target plants such as crops and wild native *** accurate and efficient classification of weed seeds is important for the effective management and control of ***,classification remains mainly dependent on destructive sampling-based manual inspection,which has a high cost and rather low *** considered that this problem could be solved using a nondestructive intelligent image recognition ***,on the basis of the establishment of the image acquisition system for weed seeds,images of single weed seeds were rapidly and completely segmented,and a total of 47696 samples of 140 species of weed seeds and foreign materials ***,six popular and novel deep Convolutional Neural Network(CNN)models are compared to identify the best method for intelligently identifying 140 species of weed *** these samples,33600 samples are randomly selected as the training dataset for model training,and the remaining 14096 samples are used as the testing dataset for model *** and GoogLeNet emerged from the quantitative evaluation as the best *** has strong classification accuracy and efficiency(low time consumption),and GoogLeNet has the best classification accuracy.A suitable CNN model for weed seed classification could be selected according to specific identification accuracy requirements and time costs of *** research is beneficial for developing a detection system for weed seeds in various *** resolution of taxonomic issues and problems associated with the identi-fication of these weed seeds may allow for more effective management and control.

关键词： Seed identification Image acquisition system Multi-object classification Convolutional neural network Computer vision

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Astaxanthine attenuates cisplatin ototoxicity in vitro and protects against cisplatin-induced hearing loss in vivo

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Acta Pharmaceutica Sinica B 2022年第1期12卷 167-181页

作者： Benyu Nan Zirui Zhao Kanglun Jiang xi gu Huawei Li xinsheng Huang Department of Otorhinolaryngology-Head and Neck Surgery Zhongshan HospitalFudan UniversityShanghai 200030China Department of Otorhinolaryngology-Head and Neck Surgery Wenzhou Medical UniversityAffiliated Hospital 2Wenzhou 325000China Department of Otolaryngology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai 200437China Department of Otolaryngology the First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005China ENT Institute and Department of Otorhinolaryngology Eye&ENT HospitalState Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain ScienceFudan UniversityShanghai 200031China Institutes of Biomedical Sciences Fudan UniversityShanghai 200031China NHC Key Laboratory of Hearing Medicine(Fudan University) Shanghai 200031China The Institutes of Brain Science and the Collaborative Innovation Center for Brain Science Fudan UniversityShanghai 200031China

Astaxanthine(AST) has important biological activities including antioxidant and antiinflammatory effects that could alleviate neurological and heart diseases, but its role in the prevention of cisplatin-induced hearing loss(CIHL) is not yet well understood. In our study, a steady interaction between AST and the E3 ligase adapter Kelch-like ECH-associated protein 1, a predominant repressor of nuclear factor erythroid 2-related factor 2(NRF2), was performed and tested via computer molecular docking and dynamics. AST protected against cisplatin-induced ototoxicity via NRF2 mediated pathwayusing quantitative PCR and Western blotting. The levels of reactive oxygen species(ROS) and mitochondrial membrane potential revealed that AST reduced ROS overexpression and mitochondrial ***, AST exerted anti-apoptosis effects in mouse cochlear explants using immunofluorescence staining and HEI-OC1 cell lines using quantitative PCR and Western blotting. Finally, AST combined with poloxamer was injected into the middle ear through the tympanum, and the protection against CIHL was evaluated using the acoustic brain stem test and immunofluorescent staining in adult mice. Our results suggest that AST reduced ROS overexpression, mitochondrial dysfunction, and apoptosis via NRF2-mediated pathway in cisplatin-exposed HEI-OC1 cell lines and mouse cochlear explants, finally promoting cell survival. Our study demonstrates that AST is a candidate therapeutic agent for CIHL.

关键词： Astaxanthine Cisplatin Hearing loss Mitochondrial Ototoxicity Reactive oxygen species Apoptosis

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Identification and management of severe multiple radiationinduced heart disease:case reports from locally advanced esophageal cancer patient

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Journal of Geriatric Cardiology 2021年第2期18卷 141-145页

作者： Yi-Xun gu xi-Zhi ZHANG Jun LI Yong CHEN Clinical Medical College Yangzhou UniversityJiangsuChina Department of Oncology Northern Jiangsu Province People Hospital of Yangzhou UniversityJiangsuChina Department of Oncology Affiliated Hospital of Yangzhou UniversityJiangsuChina

Esophageal cancer(EC)is one of the leading causes of cancer-related mortality *** is a highly malignant tumor with a high local recurrence and distant ***,about half of the world’s EC patients occur in ***,drinking liquor alcohol and eating hot food are the top three risk factors for EC in China.[1]Radiation therapy(RT)plays a pivotal role in the treatment of locally advanced EC patients,and radiation-induced heart diseases(RIHD)has become a clinically concerned problem,which may involve any structure of heart,including coronary heart disease(CHD),atrial fibrillation(AF),valvular heart disease(VHD),pericardial effusion(PE),heart failure(HF),thromboembolic disease(TED)and atrioventricular block(AVB)。

关键词： cancer esophageal mortality

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Preparation and electromagnetic properties of nanosized Co_(0.5)Zn_(0.5)Fe_(2)O_(4) ferrite

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Rare Metals 2022年第9期41卷 3228-3232页

作者： Yi-Wei Liu Jing Zhang Lu-Shun gu Li-xi Wang Qi-Tu Zhang College of Materials Science and Engineering Nanjing Tech UniversityNanjing210009China

Nanosized Co_(0.5)Zn_(0.5)Fe_(2)O_(4) ferrite was prepared by chemical co-precipitation *** samples were characterized by X-ray diffraction(XRD),field-emission transmission electron microscopy(FETEM),vibrating sample magnetometer(VSM)and network *** analysis indicates that the diameter of as-prepared powder is about 20-30 *** saturation magnetization of nanosized Co_(0.5)Zn_(0.5)Fe_(2)O_(4) ferrite is 74.01 mA·m^(2)·g^(−1).The complex permittivity and complex permeability of the Co-Zn ferrite were measured by vector network analyzer in the frequency range of 2.0-18.0 GHz,and the reflection loss(RL)was investigated according to the wave transmission *** results show that the maximum reflection loss reaches−13.7 dB at 6.8 GHz and the bandwidth of reflection loss less than−10 dB reaches 3.8 *** as-prepared nanosized Co_(0.5)Zn_(0.5)Fe_(2)O_(4) ferrite can be potentially used as an excellent microwave absorber in the C-band.

关键词： Nanosized Co-Zn ferrite Chemical co-precipitation method Electromagnetic properties Reflection loss

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文明叙事:习近平文化思想的方法论审视

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新疆师范大学学报（哲学社会科学版） 2025年第1期46卷 34-42页

作者：张明谷生秀南京大学马克思主义学院江苏南京210023

文明是中国共产党百余年推进马克思主义中国化时代化的核心线索,文明叙事是中国共产党历史叙事的重要维度,也是习近平文化思想的重要方法论。习近平文化思想的深厚文明意蕴体现在四个方面:一是从历史纵深出发把握“走自己的路”的文明基... 详细信息

文明是中国共产党百余年推进马克思主义中国化时代化的核心线索,文明叙事是中国共产党历史叙事的重要维度,也是习近平文化思想的重要方法论。习近平文化思想的深厚文明意蕴体现在四个方面:一是从历史纵深出发把握“走自己的路”的文明基因,即从中华5000多年文明的历史传承中把握中国道路的来龙去脉及其内在逻辑必然;二是以“第二个结合”为根本方法,重塑发展中华文明的使命担当,不断推动建设中华民族现代文明实现传统文明的现代新生;三是坚守文明超越理念,将新文明的建构与中国式现代化的现实实践相互关联,以中国式现代化创造人类文明新形态,打破西方以资本逻辑为核心的形而上学抽象文明观的历史困境;四是坚持文明交流互鉴,推动落实全球文明倡议,构建人类文明交往新范式。

关键词：习近平文化思想文明叙事 “走自己的路” “第二个结合” 文明交流互鉴

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Ceramics Surface Modification by Excimer Laser Metal Coating

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Journal of Materials Science & Technology 1994年第6期10卷 463-465页

作者： Weidou ZHU and Haicheng gu(Dept. of Materials Science and Engineering, xi’an Jiaotong University, xi’an, 710049, China) xi'an Jiaotong Univ Xi'an China

Thin metallic layers (~ 2 μm) of Ni were deposited on polycrystalline Al2O3. ZrO2 and (Ce-TZP)+Al2O3 ceramic substrates. and further irradiated with pulsed excimer (Xeno chloride) laser pulses. The laser energy density was varied from 0.21 to 0.81 J / cm2 to optimize bending strength. For ZrO2 ceramic, it was found that the strength increases from 530 to 753 MPa at 0.51 J / cm2 irradiation. For Al2O3 and (Ce-TZP)+ Al2O3 the fracture strength also increases in varying degree. The causes of strength increment were discussed.

关键词： Ceramics Surface Modification by Excimer Laser Metal Coating Res

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Stability of stratified flow and slugging in horizontal gas-liquid flow

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Progress in Natural Science:Materials International 2005年第11期15卷 1026-1034页

作者： gu Hanyang and guO Liejin (State Key Laboratory of Multiphase Flow in Power Engineering, xi’an Jiaotong University, xi’an 710049, China) State Key Laboratory of Multiphase Flow in Power Engineering Xi''an Jiaotong University Xi''an 710049 China

A transient one-dimensional two-fluid model is proposed to investigate numerically the interfacial instability and the onset of slugging for liquid-gas flow in a horizontal duct. In the present model, the effects of surface tension and transverse variations in dynamic pressure are taken into account. The evolution of interfacial disturbances is displayed and compared with the linear viscous Kelvin-Helmholtz stability analyses. It shows that interfacial wave is more instable due to the non-linear effect. The model predicts well the stability limit of stratified flow in comparison with the experimental data, and also automatically tracks the onset of slugging. The results show that the initiation of hydrodynamic slugging is related to local interfacial instability. Based on the cycle of slugging, a model for slug frequency is presented, which predicts the trends of slug frequencies with gas/liquid flow rate well in comparison with the available data. The effects of physical properties on slugging have been examined. It is found that with the increase in the gas viscosity and liquid density the slugging would be inhibited, whereas, with the increase in liquid viscosity and gas density, the slugging can be promoted.

关键词： two-fluid model Kelvin-Helmholtz stability interfacial instability onset of slugging gas-liquid stratified flow.

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Real-time Compliance Control of an Assistive Joint Using QNX Operating System

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International Journal of Automation and computing 2013年第6期10卷 506-514页

作者： shuang gu Cheng-Dong Wu Yong Yue Carsten Maple Da-You Li Bei-Sheng Liu Department of Computer Science and Technology University of Bedfordshire School of Information Science and Engineering Northeastern University Department of Computer Science and Software Engineering Xi'an Jiaotong-Liverpool University

An assistive robot is a novel service robot, playing an important role in the society. For instance, it can amplify human power not only for the elderly and disabled to recover/rehabilitate their lost/impaired musculoskeletal functions but also for healthy people to perform tasks requiring large forces. Consequently, it is required to consider both accurate position control and human safety, which is the compliance. This paper deals with the robot control compliance problem based on the QNX real-time operating system. Firstly, the mechanical structure of a compliant joint on the assistive robot is designed using Solidworks. Then the parameters of the assistive robot system are identified. The software of robot control includes data acquisition and processing, and control to meet the compliance requirement of the joint control. Finally, a Hogan impedance control experiment is carried out. The experimental results prove the effectiveness of the method proposed.

关键词： Assistive robot QNX system compliance control impedance control parameters identification.

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A study of gentamicin injury mechanisms using cultured mouse cochlear spiral ganglion cells

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Journal of Otology 2011年第1期6卷 31-35页

作者： gu xi LIN Chang ZHANG Rong Department of Otolaryngology-Head and Neck Surgery First Affiliated Hospital of Fujian Medical University Fuzhou Fujian 350005 China

Objective To study gentamicin injury mechanisms using postnatal mouse cochlear spiral gangcells （SGC）. Methods SGCs were isolated using a combinatorial approach of enzymatic digestion and mechanical separation from P2 - 6 Kunming mouse cochleae. After 4 days, cultured SGCs were fixed with 4% paraformaldehyde at room temperature for immunocytochemical examination using the methods of S-P and the monoclonal antibody against mouse neurofilament protein （Neurofilament-68/200Kda, NF-L＋ H）. SGCs were randomly divided into a blank control group and three gentamicin treatment groups （medium gentamicin concentration at 50 mg/L, 100 mg/L and 150 mg/L respectively）, SGCs were collected and examined under a transmission electron microscope after being cultured for 48 h. Results SGC primary culture was successful. SGC cytoplasm and neurites were dyed brownish yellow by the monoelonal mouse neurofilament protein antibody. SGCs showed classical bipolar neuron appearance. Under the transmission electron microscope,.gentamicin treated SGCs showed morphological features different compared to those in the blank control group, which might indicate apoptosis. Conclusion Our results indicate that gentamicin has direct toxic effects on cochlear SGCs in mice and the injury mechanism is closely related with apoptosis. Damage to mitochor, dria may play an important role in the process.

关键词： gentamicins spiral ganglion cells, cultured microscopy electron transmission apoptosis

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Influence of Cr Addition on Magnetic Properties of Amorphous Nd_(4)Fe_(77.5)B_(18.5) Alloy

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Chinese Physics Letters 1996年第3期13卷 227-230页

作者： gu Ben-xi SHEN Bao-gen WANG Hao ZHU xiao-bin ZHAI Hong-ru Department of Physics Nanjing UniversityNanjing 210008 State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100080 Department of Physics Southeast UniversityNanjing 210096

The influence of Cr addition on the magnetic moment,Curie temperature and crystallization temperature of amorphous Nd_(4)Fe_(77.5)B_(18.5) alloy was *** increasing Cr content,the magnetization and Curie temperature decrease,but the crystallization temperature *** is found that the substitution of Cr for Fe can enhance greatly the coercivity of crystallized sample.

关键词： alloy crystallization (4)

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