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ICA-Net: improving class activation for weakly supervised semantic segmentation via joint contrastive and simulation learning

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Optoelectronics Letters 2025年第3期 188-192页

作者： YE Zhuang LIU Ruyu SUN Bo school of Information Engineering Chengdu Aviation Vocational and Technical College school of Computer Science and Engineering Hangzhou Normal University Quanzhou Institute of Equipment Manufacturing Haixi Institutes Chinese Academy of Sciences

In the field of optoelectronics, certain types of data may be difficult to accurately annotate, such as high-resolution optoelectronic imaging or imaging in certain special spectral ranges. Weakly supervised learning can provide a more reliable approach in these situations. Current popular approaches mainly adopt the classification-based class activation maps (CAM) as initial pseudo labels to solve the task.

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Nanotechnological Applications in Aquaculture-Seafood Industries and Adverse Effects of Nanoparticles on Environment

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材料科学与工程（中英文版） 2011年第5期5卷 605-609页

作者： Erkan Can Volkan Kizak Murathan Kayim Safak Seyhaneyildiz Can Banu Kutlu Mehmet Ates Mehmet Kocabas Nida Demirtas Fisheries Faculty Tunceli University Tunceli 62000 Turkey tunceli vocational school Tunceli University Tunceli 62000 Turkey

Fabrication and Mechano-sensing Characteristics of Bending Polypyrrole Actuator

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 240-245页

作者：陈金友胡巍 school of Automotive Engineering Hunan Financial & Industrial Vocational-technical College College of Mechanical and Electrical Engineering Hunan Agricultural University

To prepare a conductive polymer actuator with decent performance,a self-built experimental platform for the preparation of polypyrrole film is *** of the essential goals is to examine the mechanical characteristics of the actuator in the presence of various combinations of process parameters,combined with the orthogonal test method of "four factors and three levels".The bending and sensing characteristics of actuators of various sizes are methodically examined using a self-made bending polypyrrole *** functional relationship between the bending displacement and the output voltage signal is established by studying the characteristics of the actuator sensor subjected to various degrees of *** experimental results reveal that the bending displacement of the actuator tip almost exhibits a linear variation as a function of length and *** the voltage reaches 0.8 V,the bending speed of the actuator tends to be ***,the mechanical properties of the self-assembled polypyrrole actuator are verified by the design and fabrication of the microgripper.

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Effect of solid waste materials on properties of magnesium matrix composites-A systematic review

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Journal of Magnesium and Alloys 2022年第10期10卷 2673-2698页

作者： Fatih Aydin TOBB Technical Sciences vocational school Karabuk UniversityTurkey

The need for light and high specific strength materials in many fields such as automotive and aerospace is increasing day by ***(Mg)-based materials have become attractive for many industries thanks to their high specific strength, good vibration damping ability, and recyclability. However, Mg’s low strength and wear resistance are important barriers limiting its industrial use. Researchers are developing Mg matrix composites using various reinforcements and expanding the use of Mg-based materials. The conventional reinforcements are Al2O3, SiC, B4C, TiB2, CNT, and GNPs for the production of Mg matrix composites. Researchers have been trying to reduce the cost of Mg matrix composites in recent years by using cheaper and environmentally friendly reinforcements. These reinforcements are solid wastes such as eggshell, fly ash, red mud, and waste glass, and their use in composite systems is becoming more common day by day. This review focuses on the Mg matrix composites reinforced with solid waste particles and the changes in wear, mechanical, corrosion, and thermal properties with the addition of these reinforcements.

关键词： Mg matrix composites Solid waste reinforcements Wear Corrosion Mechanical properties

Photodetachment dynamics of H^- ion in a harmonic potential plus a time-dependent oscillating electric field

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Chinese Physics B 2017年第10期26卷 181-188页

作者：王德华王传娟 school of Physics and Optoelectronic Engineering Ludong University Linqu vocational Education Center school

The photodetachment dynamics of H^- ion in a harmonic potential plus an oscillating electric field is studied using the time-dependent closed orbit theory. An analytical formula for calculating the photodetachment cross section of this system is put forward. It is found that the photodetachment cross section of this system is nearly unaffected for the weak oscillating electric field strength, but oscillates complicatedly when the oscillating electric field strength turns strong. In addition, the frequency of the harmonic potential and the oscillating electric field （the frequency of the harmonic potential and the frequency of the oscillating electric field are the same in the paper, unless otherwise stated.） can also affect the photodetachment dynamics of this system. With the increase of the frequency in the harmonic potential and the oscillating electric field, the number of the closed orbits for the detached electrons increased, which makes the oscillatory structure in the photodetachment cross section much more complex. Our study presents an intuitive understanding of the photodetachment dynamics driven by a harmonic potential plus an oscillating electric field from a space and time dependent viewpoint. This study is very useful in guiding the future experimental research for the photodetachment dynamics in the electric field both changing with space and time.

关键词： harmonic potential oscillating electric field time-dependent closed orbit theory photodetachment dynamics

The Effects of Salicylic Acid on Helianthus annuus L. Exposed to Quizalofop-P-Ethyl

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American Journal of Plant Sciences 2015年第14期6卷 2412-2425页

作者： Dilek Dilek Bayram Emel Yigit Gulcin Beker Akbulut Department of Biology Science and Art Faculty Inonu University Malatya Turkey Department of Organic Agriculture Tunceli Vocational School Tunceli University Tunceli Turkey

Herbicides adversely affect both the target plant and its environment. In this study, Helianthus annuus L. cv. “Oliva CL” was treated post-emergence with 0.3 to 3.1 mM quizalofop-p-ethyl. The peroxidase activity (POD), ascorbate peroxidase activity (APX), lipid peroxidation, pigment sys tem and total phenolic content were then determined on the 1st, 5th, 10th and 15th days following treatment. The POD activity increased on all application days, and the APX activity increased on the 5th day and decreased on the 10th and 15th days. In addition, the malondialdehyde (MDA) content was increased on the 1st, 5th, 10th and 15th days, except for the in H. annuus plants treated with 1.6 to 3.1 mM quizalofop-p-ethyl. The total chlorophyll, carotenoid and total phenolic content were important and changed in a time dependent manner. In the present study, we also investigated the possible role of salicylic acid (SA) in protecting H. annuus seedlings from herbicide toxicity. The plants were first treated with 0.5 mM SA pre-emergence and then treated with 0.3 to 3.1 mM quizalofop-p-ethyl herbicide post-emergence. In general, increases in the POD activity and MDA content were observed in the treatment groups on all application days. In the treated groups, the APX activity increased until the 15th day. In the SA pre-treated plants, the total phenollic, total chlorophyll and carotenoid content were also important in a time dependent manner.

关键词： Ascorbate Peroxidase Lipid Peroxidation Peroxidase Pigment Quizalofop-P-Ethyl Salicylic Acid Total Phenolic

miRNA-21-5p is an important contributor to the promotion of injured peripheral nerve regeneration using hypoxia-pretreated bone marrow-derived neural crest cells

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Neural Regeneration Research 2025年第1期20卷 277-290页

作者： Meng Cong Jing-Jing Hu Yan Yu Xiao-Li Li Xiao-Ting Sun Li-Ting Wang Xia Wu Ling-Jie Zhu Xiao-Jia Yang Qian-Ru He Fei Ding Hai-Yan Shi school of Medicine Nantong UniversityNantongJiangsu ProvinceChina Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education and Coinnovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Physiology Jiangsu Health Vocational CollegeNanjingJiangsu ProvinceChina Department of Pathology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina

Our previous study found that rat bone marrow–derived neural crest cells(acting as Schwann cell progenitors)have the potential to promote long-distance nerve ***-based therapy can enhance peripheral nerve repair and regeneration through paracrine bioactive factors and intercellular ***,the complex contributions of various types of soluble cytokines and extracellular vesicle cargos to the secretome remain *** investigate the role of the secretome and extracellular vesicles in repairing damaged peripheral nerves,we collected conditioned culture medium from hypoxia-pretreated neural crest cells,and found that it significantly promoted the repair of sensory neurons damaged by oxygen-glucose *** mRNA expression of trophic factors was highly expressed in hypoxia-pretreated neural crest *** performed RNA sequencing and bioinformatics analysis and found that miR-21-5p was enriched in hypoxia-pretreated extracellular vesicles of neural crest ***,to further clarify the role of hypoxia-pretreated neural crest cell extracellular vesicles rich in miR-21-5p in axonal growth and regeneration of sensory neurons,we used a microfluidic axonal dissociation model of sensory neurons in vitro,and found that hypoxia-pretreated neural crest cell extracellular vesicles promoted axonal growth and regeneration of sensory neurons,which was greatly dependent on loaded ***,we constructed a miR-21-5p-loaded neural conduit to repair the sciatic nerve defect in rats and found that the motor and sensory functions of injured rat hind limb,as well as muscle tissue morphology of the hind limbs,were obviously *** findings suggest that hypoxia-pretreated neural crest extracellular vesicles are natural nanoparticles rich in ***-21-5p is one of the main contributors to promoting nerve regeneration by the neural crest cell *** helps to explain the mechanism of action of the secretome and e

关键词： axotomy cell-free therapy conditioned medium extracellular vesicles hypoxic preconditioning microRNA oxygen-glucose deprivation peripheral nerve injury Schwann cell precursors

Exploring the therapeutic potential of microwave-assisted biosynthesized silver nanoparticles using Erica manipuliflora Salisb.:A comprehensive study on anticancer and antibacterial potentials

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Particuology 2024年第12期95卷 212-222页

作者： Funda Ulusu vocational school of Technical Sciences Karamanoglu Mehmetbey University70100KaramanTurkey

Silver nanoparticles(AgNPs)continue to attract interest due to their potential applications in biomedicine,especially in relation to their antibacterial and anticancer *** this respect,it is important to develop biosynthesis techniques that are environmentally friendly and include new *** is the first report on microwave-assisted green synthesis of silver nanoparticles using Erica manipuliflora Salisb.(E.m AgNPs).In this study,the anti-cancer and antibacterial activity of E.m AgNPs and *** extracts were *** of E.m AgNPs were performed using UV–Vis spectroscopy FT-IR,XRD,SEM and TEM *** UV–Vis absorption spectrum showed the characteristic peak of E.m AgNPs atλmax=425 *** SEM and TEM results indicated that the nanoparticles were spherical and ranged in size from 2.45 to 9.95 *** antibacterial results,it was determined that E.m AgNPs(50 mg mL^(−1))(8.4–21.1 mm ZOI)caused more effective inhibition on both gram positive(Bacillus subtilis,Staphylococcus aureus,Enterococcus faecalis)and gram negative(Escherichia coli)bacteria compared to all plant extracts(50 mg mL^(−1))(8.13–17.16 mm ZOI).Among the cancer(MCF-7 and HT-29)and healthy(HaCaT and HEK-293)cell lines,E.m AgNPs exhibited the highest cytotoxicity against MCF-7 cells(IC50:87.22μg mL^(−1)).The hexane extract was the most effective inhibitory extract on cell proliferation of all cell lines and showed the highest cell inhibition in MCF-7 cells(IC50:43.06μg mL^(−1)).The results revealed that both E.m AgNPs and *** extracts showed promising antibacterial activity against pathogenic bacterial strains and had potential anticancer activity.

关键词： Silver nanoparticles Antibacterial activity Anti-cancer activity

A DFT Study on the Reaction Mechanism Involved in the Synthesis of Sodium Azide via Hydrazine Hydrate Method

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Chinese Journal of Structural Chemistry 2018年第7期37卷 1045-1051页

作者：孙华云李明晶刘永军 school of Metallurgy Shandong Vocational College of Industry school of Chemistry and Chemical Engineering Shandong University

Sodium azide is a widely used inorganic compound. Besides the commonly used method of ＂Wislicenus process＂ which uses ammonia, nitrous and sodium as materials, the hydrazine hydrate route is also employed for the preparation of sodium azide particularly in laboratory. However, because many species are involved in the reaction system, the reaction details for the hydrazine hydrate route are still unclear. A comprehensive understanding of the reaction mechanism may provide meaningful help for optimizing the production process. In this work, the reaction mechanism for the synthesis of sodium azide by hydrazine hydrate route has been studied using density function theory（DFT） method. On the basis of our calculations, the reaction details, including the energetics of ten elementary steps, the structures of intermediates and transition states as well as the influence of inorganic acids and alcohols, were illuminated at the atomistic level. Both the two steps, the generation of key intermediate（NH2-NH-NO） and the trans-cistransformation of NH2-NH-NO, are suggested to be the possible rate-limiting step, corresponding to the energy barriers of 20.3 and 22.7 kcal/mol, respectively. In the early reaction steps to generate NH2-NH-NO, the main role of sulphuric acid is to donate proton, which can be replaced by nitric acid or hydrochloric acid. From the energy point of view, isopropanol has similar reactivity as methanol and ethanol.

关键词： sodium azide hydrazine hydrate DFT method isopropanol sulphuric acid