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Study on the processing technology of Polygonatum cyrtonema Hua decoction pieces based on softening method and drying method

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Natural Therapy Advances 2024年第3期7卷 56-64页

作者： Jun-Li Zhang Hai-Ting zhu Xin-Ning Zhang si-Yuan Ma Yu-Feng Hu Jing-Qiu Zhang Ming-Rui Jiang Hui-Nan Wang Ying-Zi Wang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102488China.

Background:To optimize the steaming processing technology of Polygonatum cyrtonema Hua(PC)decoction ***:The softening method and drying method of PC decoction pieces were studied with Polygonatum Polysaccharide(PCP),diosgenin combined extract as quantitative *** process parameters such as softening time,drying temperature and drying time were determined,and the best processing technology of PC decoction pieces was ***:Among the three softening methods of PC,the infiltration method had the highest ranking,with an average comprehensive index of 0.9496,and the softening effect was the *** the three drying methods,the drying effect of the hot air drying method was the best,and the average comprehensive index was ***:The infiltration method is the best softening method for PC decoction pieces,and the hot air drying method is the best drying method for PC decoction pieces.

关键词： Polygonatum cyrtonema Hua assaying preparative technics

Mechanical performance of 22siMn2TiB steel welded with lowtransformation- temperature filler wire and stainless steel filler wire

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Journal of Iron and Steel Research International 2024年第4期31卷 967-981页

作者： Zi-dong Lin Kai-jie Song Zhen Sun Zi-qian zhu Xue-feng Zhao Constantinos Goulas Wei Ya Xing-hua Yu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China Department of Design Production and management Faculty of Engineering Technology.University of TwenteEnschede 7500 AETheNetherlands Rotterdam Additive manufacture Fieldlab(RAMLAB) Rotterdam 3089 JWTheNetherlands

TX-80 low-transformation-temperature(LTT)welding wire was used to replace the traditional ER 307si welding wire to realize the connection of 22siMn2TiB armor steel in manual overlay *** previously existing issues,such as welding cracks,large welding deformation,and severe welding residual stress,were solved to ensure good strength and ductility *** particular,with the same welding conditions,TX-80 LTT wire eliminates welding *** reduces the welding deformation no matter the base pretreatment of pre-setting angle or no pre-setting *** comparison,it was found that the microstructure at the TX-80 weld is mainly composed of martensite and a small amount of retained *** contrast,the microstructure of the ER 307si weld consists of a large amount of austenite and a small amount of skeleton-like *** variation trend of residual stress and microhardness from the weld to the base were investigated and compared with the mechanical properties of base *** TX-80 and the ER 307si tensile samples elongation is 6.76%and 6.01%,while the ultimate tensile strengths are 877 and 667 MPa,*** average impact toughness at room temperature of the ER 307si weld is 143.9 J/cm^(2),much higher than that of the TX-80 weld,which is only 36.7 J/cm^(2).The relationship between impact and tensile properties with microstructure species and distribution was *** addition,the fracture surface of the tensile and the impact samples was observed and *** dimples,fewer pores,larger radiation zone,and shear lips of TX-80 samples indicate better tensile ductility and worse impact toughness than those of ER 307si weld.

关键词： Low-transformation-temperature material 22siMn2TiB steel Welding deformation Residual stress Martensitic transformation Mechanical property

Characteristics and mechanism of Ni^(2+)and Cd^(2+)adsorption by recovered perlite from agar extraction residue

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Chinese Journal of Chemical Engineering 2024年第8期72卷 141-152页

作者： Juan Wang Yanbing zhu Zedong Jiang Xiping Du Mingjing Zheng Lijun Li Hui Ni Yuanpeng Wang Zhipeng Li Qingbiao Li College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China Fujian Provincial Key Laboratory of Food Microbiology and Enzyme Engineering Xiamen 361021China Research Center of Food Biotechnology of Xiamen City Xiamen 361021China Xiamen Ocean Vocational College Xiamen 361021China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361021China

Ni^(2+)and Cd^(2+)in wastewater accumulated through the ecological chain and could jeopardize human *** of Ni^(2+)and Cd^(2+)from wastewater using recovered perlite was an important way to solve the problem of resource utilization of solid waste from agar *** previous study confirmed that recovered perlite from agar extraction residue had better pore size and specific surface area than commercial ***,the adsorption efficiency and adsorption mechanism of recovered perlite were the main factors limiting its adsorption *** adsorption process of Ni^(2+)and Cd^(2+)by recovered perlite in aqueous solution was described by the pseudo-second-order kinetic equation,and the relevant adsorption mechanism was mainly *** with commercial perlite,the adsorption removal rate of Ni^(2+)and Cd^(2+)by enzymatic recovered perlite could reach 92.9%and 89.2%,respectively,and were improved by 12.63%and 13.03%.Langmuir isothermal adsorption model could better describe the isothermal adsorption process of recovered perlite on heavy metal Ni^(2+)and Cd^(2+),and the relevant adsorption mechanism was mainly monolayer *** X-ray photoelectron spectroscopy(XPS)results indicated that the decrease of si—O si^(2+)hydroxyl coordination bond and the increase of C—si bond might make the binding effect of recovered perlite with heavy metals *** competitive adsorption of Ni^(2+)and Cd^(2+)by recovered perlite was still dominated by chemisorption and monolayer *** study was expected to provide a theoretical basis and technical support for the removal of Ni^(2+)and Cd^(2+)from wastewater using recovered perlite from seaweed residue.

关键词： Agar extraction residue Recovered perlite Heavy metal ion Adsorption property

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乡村振兴背景下的神农架IP形象设计

绿色包装 2024年第2期 139-142页

作者：黄曼思刘瑗湖北美术学院湖北武汉430000

本文以湖北省直辖林区神农架为研究对象,通过挖掘乡村文化内涵,以神农架地区代表性五谷杂粮作为IP形象设计目标,将盲盒作为主要传播路径,进行创新融合延伸设计,以期更好地发挥乡村文化价值,在一定程度上促进当地文化创意产业与传统产业... 详细信息

本文以湖北省直辖林区神农架为研究对象,通过挖掘乡村文化内涵,以神农架地区代表性五谷杂粮作为IP形象设计目标,将盲盒作为主要传播路径,进行创新融合延伸设计,以期更好地发挥乡村文化价值,在一定程度上促进当地文化创意产业与传统产业,助力乡村振兴。

关键词：乡村振兴 IP形象设计地域文化神农架

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基于时频波动溢出网络的中国金融机构关联性

系统工程学报 2024年第4期39卷 592-610页

作者：王纲金司慧斌祝由谢赤湖南大学工商管理学院湖南长沙410082

金融机构关联性是系统性风险的主要来源,厘清时频域下金融机构关联性特征有助于防范与化解系统性风险.本文基于30家A股上市金融机构在2011年~2020年期间的高频交易数据,构建时频波动溢出网络研究中国金融机构关联性.通过引入网络密度与... 详细信息

金融机构关联性是系统性风险的主要来源,厘清时频域下金融机构关联性特征有助于防范与化解系统性风险.本文基于30家A股上市金融机构在2011年~2020年期间的高频交易数据,构建时频波动溢出网络研究中国金融机构关联性.通过引入网络密度与全局效率两个系统层面指标和入度、出度与相对影响值三个机构层面指标,以测度时频域下静态与动态关联性.研究发现:中国金融机构间的关联性主要为20天~60天的中长期关联性;在极端事件期间,往往表现为长期关联性增强和短期关联性减弱;银行部门倾向于接收偏短期的波动关联性并发出偏短期波动关联性,而证券和保险部门倾向于接收偏长期的波动关联性并发出偏短期的波动关联性.

关键词：复杂金融网络关联性时频波动溢出金融机构系统性风险

High-speed flexible near-infrared organic photodiode for optical communication

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National Science Review 2024年第3期11卷 227-238页

作者： Yu zhu Hongbin Chen Ruiman Han Hao Qin Zhaoyang Yao Hang Liu Yanfeng Ma Xiangjian Wan Guanghui Li Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryTianjin Key Laboratory of Functional Polymer Materials College of Chemistry and Renewable Energy Conversion and Storage Center(RECAST) Nankai University State Key Laboratory of Elemento-Organic Chemistry Nankai University

Optical communication is a particularly compelling technology for tackling the speed and capacity bottlenecks in data communication in modern society. Currently, the silicon photodetector plays a dominant role in high-speed optical communication across the visible-near-infrared spectrum. However, its intrinsic rigid structure, high working bias and low responsivity essentially limit its application in next-generation flexible optoelectronic devices. Herein, we report a narrow-bandgap non-fullerene acceptor（NFA） with a remarkable π-extension in the direction of both central and end units（CH17） with respect to the Y6 series, which demonstrates a more effective and compact 3D molecular packing, leading to lower trap states and energetic disorders in the photoactive film. Consequently, the optimized solution-processed organic photodetector（OPD） with CH17 exhibits a remarkable response time of 91 ns（λ = 880 nm） due to the high charge mobility and low parasitic capacitance, exceeding the values of most commercial si photodiodes and all NFA-based OPDs operating in self-powered mode. More significantly, the flexible OPD exhibits negligible performance attenuation（mance even after 550 h of indoor exposure. Furthermore, the high-speed OPD demonstrates a high data transmission rate of 80 MHz with a bit error rate of 3.5 × 10-4, meaning it has great potential in next-generation high-speed flexible optical communication systems.

关键词： flexible organic photodetector high-speed NIR organic photodetector optical communication light fidelity narrow-bandgap non-fullerene acceptors

Surface-induced Microstructure and Performance Changes in P3HT Ultrathin Films

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Chinese Journal of Polymer Science 2024年第6期42卷 805-814页

作者： Hong-Tao Shan Jia-Xin He Bing-Yan zhu Xue-Ting Cao Ying-Ying Yan Jian-Jun Zhou Hong Huo Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China

In this work,poly(3-hexylthiophene)(P3HT)ultrathin films(P3HT-T)were prepared by spin-coating a dilute P3HT solution(in a toluene:o-dichlorobenzene(Tol:ODCB)blend with a volume ratio of 80:20)with ultrasonication and the addition of the nucleating agent bicycle[2.2.1]heptane-2,3-dicarboxylic acid disodium salt(HPN-68L)on glass,si wafers and indium tin oxide(ITO)*** electrical and mechanical properties of the P3HT-T ultrathin films were investigated,and it was found that the conductivity and crack onset strain(COS)were simultaneously improved in comparison with those of the corresponding pristine P3HT film(P3HT-0,without ultrasonication and nucleating agent)on the same substrate,regardless of what substrate was ***,the conductivity of P3HT-T ultrathin films on different substrates was similar(varying from 3.7 S·cm^(-1)to 4.4 S·cm^(-1)),yet the COS increased from 97%to 138%by varying the substrate from a si wafer to *** grazing-incidence wide-angle X-ray diffraction(GIXRD),UV-visible(UV-Vis)spectroscopy and atomic force microscopy(AFM),we found that the solid order and crystallinity of the P3HT-T ultrathin film on the si wafer are highest,followed by those on glass,and much lower on ***,the surface energy and roughness of three substrates were investigated,and it was found that the polar component of the surface energyγp plays a critical role in determining the crystalline microstructures of P3HT ultrathin films on different *** work indicates that the P3HT ultrathin film can obviously improve the stretchability and simultaneously retain similar electrical performance when a suitable substrate is *** findings offer a new direction for research on stretchable CP ultrathin films to facilitate future practical applications.

关键词： P3HT ultrathin film Substrate Crystalline microstructures Polar component of the surface energy Electrical and stretchable performances

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基于深度学习的场景文字识别技术研究

印刷与数字媒体技术研究 2024年第3期 237-243,291页

作者：陈志宇司占军朱新雨天津科技大学轻工科学与工程学院天津300457 天津科技大学人工智能学院天津300457

基于深度学习的场景文字识别技术(Scene Text Recognition,STR)应用广泛但性能尚需提升。针对现有的STR技术对小目标文字识别不准确和中文、中英文混合准确率低的问题,通过改进模型增加104×104的特征尺度,用Focal Loss和GIOU Loss作为... 详细信息

基于深度学习的场景文字识别技术(Scene Text Recognition,STR)应用广泛但性能尚需提升。针对现有的STR技术对小目标文字识别不准确和中文、中英文混合准确率低的问题,通过改进模型增加104×104的特征尺度,用Focal Loss和GIOU Loss作为损失函数来优化目标检测框,将卷积块注意力模块(Convolutional Block Attention Module,CBAM)嵌入到卷积层中,使网络在特定位置和通道上更加关注目标,抑制其余复杂背景信息以此来提高模型的文字检测能力;分析中文的文字特征,对CRNN的特征提取网络改进优化,提高了原有模型对中文、中英文混合识别的准确性。实验结果表明,通过对文字检测与识别模型和算法的改进优化,大大提高了场景文字识别技术的准确性和鲁棒性。

关键词：深度学习场景文字识别技术图像处理目标检测文字识别

Role of texture before rolling: a research based on texture and magnetic properties of 4.5 wt.% si non-oriented electrical steel

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Journal of Iron and Steel Research International 2024年第8期31卷 1973-1986页

作者： Yu-fan Wang Guo-qing Zu Shi-cheng Sun Ying Han Wei-wei zhu Hui Wu Yu Zhao Xu Ran Key Laboratory of Advanced Structural Materials of Ministry of Education Changchun University of TechnologyChangchun 130012JilinChina CRRC Changchun Railway Vehicles Co. Ltd.Changchun 130000JilinChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia

The evolution of microstructure,texture,and magnetic properties with random texture,near-copper texture,weak near-cube texture,and strong λ fiber(/ND(normal direction))before rolling of non-oriented electrical steel was *** recrystallized hot bands with different textures but similar grain sizes were prepared by pre-annealing at low-temperature and high-temperature normalization *** was observed that the final annealed products exhibited similar recrystallized *** contrast,the final annealed product with more 2 fiber before rolling exhibited a stronger cube *** the fiber before rolling becoming stronger,the proportion of(111)deformed matrices became larger,which could be observed in the early recrystallization *** overwhelmingly dominant 2 orientation nuclei are formed in the(111)deformed matrix and become the dominant ***,the best magnetic properties are obtained in the products with strong 2 fiber before rolling,corresponding to the strong cube texture and low anisotropyparameter.

关键词： Texture before rolling Non-oriented electrical steel-Nucleation Grain growth Magnetic property