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Reference Selection for Offline Hybrid Siamese Signature Verification Systems

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Computers, Materials & Continua 2022年第10期73卷 935-952页

作者： Tsung-Yu Lu Mu-en Wu Er-hao Chen Yeong-Luh Ueng Department of Electrical engineering National Tsing Hua UniversityHsinchuTaiwan Department of Information and Finance Management National Taipei University of TechnologyTaipeiTaiwan Department of Communications engineering National Tsing Hua UniversityHsinchuTaiwan Department of Electrical engineering and the Institute of Communications engineering National Tsing Hua UniversityHsinchuTaiwan

This paper presents an off-line handwritten signature verification system based on the Siamese network,where a hybrid architecture is *** Residual neural Network(ResNet)is used to realize a powerful feature extraction model such that Writer Independent(WI)features can be effectively learned.A single-layer Siamese Neural Network(NN)is used to realize a Writer Dependent(WD)classifier such that the storage space can be *** the purpose of reducing the impact of the high intraclass variability of the signature and ensuring that the Siamese network can learn more effectively,we propose a method of selecting a reference signature as one of the inputs for the Siamese *** take full advantage of the reference signature,we modify the conventional contrastive loss function to enhance the *** using the proposed techniques,the accuracy of the system can be increased by 5.9%.Based on the GPDS signature dataset,the proposed system is able to achieve an accuracy of 94.61%which is better than the accuracy achieved by the current state-of-the-art work.

关键词： Siamese network offline signature verification residual neural network reference selection

Effects of Temperature on Fretting Corrosion Between Alloy 690TT and 405 Stainless Steelin Pure Water

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Acta Metallurgica Sinica(english Letters) 2019年第12期32卷 1437-1448页

作者： Xing-Chen Liu Hong-Liang Ming Zhi-Ming Zhang Jian-Qiu wang Li-Chen Tang hao Qian Yong-Cheng Xie en-Hou Han CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and engineering University of Science and Technology of ChinaShenyang 110016China Shanghai Nuclear engineering Research and Design Institute Ltd.Co. Shanghai 200233China

In pressurized water reactor,fretting corrosion has become the main reason for the failure of 690TT heat exchanger *** effect of temperature on the fretting corrosion behavior between 690TT tube and 405 stainless steel(SS)bar has been studied during 106 fretting *** overall average coefficient of friction(COF)values descends with an increase in test temperature,while the width of worn scar becomes *** severest fretting corrosion happens when the test temperature is at 100℃.The wear mechanism differs at different test temperatures,from adhesive wear at room temperature to abrasive wear and delamination at 100℃,to abrasive wear at 200℃.Deformation slips,high residual strain concentration,and micro-cracks are found which are disadvantageous for the further service performance of the tubes.

关键词： Alloy 690TT 405 SS Fretting corrosion Temperature

基于PI3K/Akt信号通路探讨脂联素对正畸牙移动及牙周组织改建的延缓作用

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临床口腔医学杂志 2024年第9期40卷 538-542页

作者：蔡齐蔚一博任昊天王彦蒽陈玉海军军医大学第一附属医院口腔科上海200433

目的:基于PI3K/Akt信号通路探讨脂联素(adiponectin,APN)对牙周组织改建的延缓作用。方法:选择2020年1月~2023年1月本院收治正畸患者150例作为研究对象,收集患者性别、年龄、身体质量指数(body mass index,BMI)等基础信息,并采集牙周组... 详细信息

目的:基于PI3K/Akt信号通路探讨脂联素(adiponectin,APN)对牙周组织改建的延缓作用。方法:选择2020年1月~2023年1月本院收治正畸患者150例作为研究对象,收集患者性别、年龄、身体质量指数(body mass index,BMI)等基础信息,并采集牙周组织样本,检测牙周组织APN、破骨细胞分化因子(osteoclast differentiation factor,ODF)、核结合因子-α1(core binding factor-α1,CBF-α1)、磷脂酰肌醇-3-激酶(phosphatidyl-inositol-3-kinase,PI3K)、蛋白激酶B(protein kinase B,PKB/Akt)mRNA及蛋白表达水平;行正畸治疗4个月后,测量患者正畸牙移动距离。结果:不同性别患者APN、牙齿移动距离、ODF、CBF-α1、PI3K、Akt mRNA及蛋白表达水平差异无统计学意义(P>0.05);不同年龄、BMI患者APN、牙齿移动距离、ODF、CBF-α1、PI3K、Akt mRNA及蛋白表达水平差异有统计学意义(P<0.05)。Pearson相关分析结果显示,APN mRNA与牙齿移动距离、ODF mRNA、PI3K mRNA及Akt mRNA表达水平呈负相关(r=-0.72、-0.70、-0.76、-0.82,P<0.05),与CBF-α1 mRNA表达水平呈正相关(r=0.68,P<0.05);PI3K mRNA和Akt mRNA表达水平与牙齿移动距离、ODF mRNA表达水平呈正相关(r=0.78、0.76、0.81、0.81,P<0.05),与CBF-α1 mRNA表达水平呈负相关(r=-0.67、-0.69,P<0.05)。结论:正畸患者牙周组织改建会受到牙周组织APN表达水平的影响,其机制可能与APN调控PI3K/Akt信号通路相关蛋白的表达有关。

关键词：正畸牙周组织改建脂联素 PI3K/Akt信号通路

Synthesis and Immunosuppressive Activity of New Amino Alcohol Derivatives(Ⅰ)

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Chemical Research in Chinese Universities 2011年第4期27卷 614-618页

作者： MI hao-yu CUI Lin-lin ZHANG Qun-li LI Fang JIANG Tao LIANG Yong-tao wang en-si College of Life Science Jilin University Changchun 130012 R R. China School of Pharmacy Jilin University Changchun 130021 P. R. China

A series of new amino alcohol derivatives was synthesized and evaluated for their immunosuppressive activity on mouse peripheral blood *** structures were confirmed by means of 1H NMR,13C NMR,IR and *** of the compounds display moderate to potent inhibitory *** 9d shows the most activity among them that are expected as a powerful candidate for safer immunosuppressant for organ transplantations and the treatment of autoimmune diseases.

关键词： Immunosuppressant Amino alcohol derivative Bucherer-Bergs reaction

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战略性新兴领域拔尖创新人才的早期成长机制

高等教育研究 2024年第4期45卷 68-78页

作者：金红昊华中科技大学教育科学研究院湖北武汉430074

基于“全国高校教学质量与学生发展监测追踪调查”数据中的资优学生样本,从高中与大学教育衔接视角切入,实证考察战略性新兴领域拔尖创新人才的早期成长机制发现,在战略性新兴领域相关专业,资优学生高中阶段的超前探究、生涯规划与综合... 详细信息

基于“全国高校教学质量与学生发展监测追踪调查”数据中的资优学生样本,从高中与大学教育衔接视角切入,实证考察战略性新兴领域拔尖创新人才的早期成长机制发现,在战略性新兴领域相关专业,资优学生高中阶段的超前探究、生涯规划与综合实践学习体验均能显著促进其在大学阶段的综合发展。高考成绩可有效预测资优学生的大学学业表现,但在大学专业兴趣和通用能力发展方面,高考选拔效果尚未彰显。因此,战略性新兴领域的拔尖创新人才培养应突破“强筛选、晚起点、弱衔接”的传统模式,构建贯通式育人机制,以促进高层次人才的动态成长与系统涌现。

关键词：战略性新兴领域拔尖创新人才早期成长机制

Risk factors of rhegmatogenous retinal detachment associated with choroidal detachment in Chinese patients

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International Journal of Ophthalmology(english edition) 2016年第7期9卷 989-993页

作者： Yong-hao Gu Gen-Jie Ke Lin wang Qi-Hong Gu en-Liang Zhou Hong-Biao Pan Shi-Ying wang Department of Ophthalmology Anhui Provincial Hospital affiliated to Anhui Medical University

AIM： To comprehensively analyze the risk factors of rhegmatogenous retinal detachment （RRD） associated with choroidal detachment （CD）. METHODS： A total of 265 eyes of 265 consecutive cases of RRD were retrospectively analyzed. All patients had systemic and ophthalmologic examination. CD was diagnosed by indirect ophthalmoscopy, B -scan ultrasonography, and ultrasound biomicroscope （UBM）. Each parameter was compared between patients of RRD and rhegmatogenous retinal detachment associated with choroidal detachment （RRDCD）. Logistic regression analysis was used to determine the independent risk factors of CD. RESULTS： There were 52 eyes （19.62%） with CD. Pseudophakia was more commonly seen in RRDCD （21.15% ys6.10%, P=0.002）. Intraocular pressure （lOP） was lower （8.60 ±3.62 ys 12.96 ±3.55, P 〈0.001）, best - corrected visual acuity was worse [3.00 （2.00 to 3.00） vs 1.92 （1.22 to 3.00）, P=-0.001], and refractive error was more myopic [-4 （-9 to -2） vs -2 （-6 to 0）, P=0.007] in RRDCD. Eyes with RRDCD had larger extent of retinal detachment （P=0.007）. In RRDCD, 34.62% of eyes presented with multiple holes （P=0.044） and 25.00% with macular holes （P=0.012）, compared with 20.66% and 14.08% in R RD. High myopia （P=0.039）, low lOP （P=0.017）, and larger extent of retinal detachment （P〈0.001） were significant and independent risk factors for developing CD. - CONCLUSION： For CD in RRD, related factors include BCVA, lOP, lens status, refractive error, extent of retinal detachment, number of holes, and macular hole. Larger extent of retinal detachment, high myopia, and low lOP are significant and independent risk factors.

关键词： choroidal detachment retinal detachment risk factor

新质生产力:特质·机理·方法论——基于中国经济学自主知识体系建构的视域

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经济问题 2024年第9期 1-6页

作者：孙浩进纪玉山申浩然黑龙江省社会科学院经济研究所黑龙江哈尔滨150040 吉林大学经济学院吉林长春130012 中国社会科学院西部发展研究中心北京100040

新质生产力是习近平经济思想的重要理论创新,是中国特色社会主义政治经济学中新的学理范畴,是马克思主义政治经济学中国化时代化的重要成果。新质生产力理论延伸、拓展了生产力理论体系,是一场“范式革命”,对于建构中国经济学自主知识... 详细信息

新质生产力是习近平经济思想的重要理论创新,是中国特色社会主义政治经济学中新的学理范畴,是马克思主义政治经济学中国化时代化的重要成果。新质生产力理论延伸、拓展了生产力理论体系,是一场“范式革命”,对于建构中国经济学自主知识体系具有重要理论价值。新质生产力代表生产力演化中能级跃升,是新质态的生产力。对新质生产力特质、机理、方法论进行系统化、学理化阐释,能够避免“泛泛而论”“虚置虚化”的研究趋向,为建构中国经济学自主知识体系提供理论支撑、创新范式。新质生产力的特质在于进化性、集成性、风险性等,运行机理在于微观维度上的新质企业、中观维度上的新质产业、宏观维度上的新质经济体系等。在此基础上,研究新质生产力需要构建“新质”方法论,确立“人是创新之本”,把握好量变—质变—裂变、可能性—现实性—颠覆性、偶然性—突变性—必然性等方法论,以实现精准“导航”、深化拓展理论研究。因地制宜地践行新质生产力,就要在其运行机理的基础上,立足创新活动的实践,在新质生产力的生成、演化中持续发挥效能,推动整体上的创新驱动发展。

关键词：新质生产力新质企业新质产业新质经济体系

塔里木盆地先巴扎地区走滑断裂特征及石油地质意义

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断块油气田 2024年第2期31卷 266-275页

作者：马海陇蒋林姜应兵王震郝建龙王明中国石化西北油田分公司勘探开发研究院新疆乌鲁木齐830001 缝洞型油藏提高采收率重点实验室新疆乌鲁木齐830001

文中利用三维地震资料开展了麦盖提斜坡先巴扎地区断裂的精细解析,明确了走滑断裂特征、形成期次、成因机制等,结合邻区含油气地质条件,探讨了奥陶系走滑断裂的含油气性,预测油气富集模式。研究发现,研究区发育北东向、北西向、近南北... 详细信息

文中利用三维地震资料开展了麦盖提斜坡先巴扎地区断裂的精细解析,明确了走滑断裂特征、形成期次、成因机制等,结合邻区含油气地质条件,探讨了奥陶系走滑断裂的含油气性,预测油气富集模式。研究发现,研究区发育北东向、北西向、近南北向、北东东向等4组走滑断裂体系,主要经历了5期构造活动,形成了5个构造层:加里东早期发育北东向、北西向正断裂(基底构造层);加里东中晚期受西昆仑造山运动影响,部分正断裂继承活动,形成左行左阶北东向、右行左阶北西向走滑断裂(下构造层);加里东晚期—海西早期受阿尔金造山运动影响,形成1条左行左阶北东东向走滑断裂(中构造层);海西晚期北东向、北西向走滑断裂继承活动,同时新形成色力布亚逆冲断裂的近南北向伴生断裂(上构造层);喜山早期沿古近系膏泥层发育叠瓦状逆冲断裂及在喜山晚期发生整体掀斜(顶构造层)。基于邻区含油气特征,认为该区沿断裂带发育加里东中期Ⅰ—Ⅲ幕岩溶缝洞型储层,与上覆志留系泥岩形成储盖组合,海西晚期来自麦盖提斜坡西北部寒武系玉尔吐斯组的远源油气沿先巴扎断裂带向走滑断裂调整聚集成藏。其中,断穿基底的奥陶系北东向张扭走滑断裂的储集性能优于其他走向断裂,含油气条件最优越,值得探索。

关键词：碳酸盐岩走滑断裂构造演化先巴扎塔里木盆地

Rice-duck co-culture benefits grain 2-acetyl-1-pyrroline accumulation and quality and yield enhancement of fragrant rice

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The Crop Journal 2019年第4期7卷 419-430页

作者： Meijuan Li Ronghua Li Shiwei Liu Jia'en Zhang hao Luo Shuqing Qiu College of Natural Resources and environment South China Agricultural University Guangzhou 510642 Guangdong China Guangdong engineering Technology Research Centre of Modern Eco-agriculture and Circular Agriculture Guangzhou 510642 Guangdong China Key Laboratory of Agro-environment in the Tropics Ministry of Agriculture Guangzhou 510642 Guangdong China

Rice-duck co-culture is an integrated farming technology that benefits rice production, grain quality, and ecological sustainability in paddy fields. However, little is known about the effects of rice-duck co-culture on enzyme activity involved in the biosynthesis of 2-acetyl-1-pyrroline (2-AP), the volatile that gives fragrant rice its' distinctive and sought-after aroma. The present study aimed to examine the influence of rice-duck co-culture on the photosynthesis, yield, grain quality, rice aroma, and the enzymes involved in 2-acetyl-1-pyrroline biosynthesis in the cultivar Meixiangzhan 2 during the early and late rice growing seasons of 2016 in Guangzhou, China. We compared the rice grown in paddy fields with and without ducks. We found that rice-duck co-culture not only improved the yield and quality of fragrant rice grain, but also promoted the precursors of 2-AP biosynthesis formation and 2-AP accumulation in the grain. Grain 2-AP content in rice-duck co-culture was noticeably increased with 9.60% and 20.81% in early and late seasons, respectively. Proline and pyrroline-5-carboxylic acid (P5C) (precursors of 2-AP biosynthesis) and the activity of enzymes such as proline dehydrogenase (ProDH), ornithine aminotransferase (OAT) and Δ1 pyrroline-5-carboxylic acid synthetase (P5CS) were all improved by 10.15%–12.99%, 32.91%–47.75%, 17.81%–26.71%, 6.25%–21.78%, and 10.58%–38.87% under rice-duck co-culture in both seasons, respectively. Overall, our results suggest that rice-duck co-culture is an environmentally-friendly and sustainable approach to improving rice aroma and grain quality of fragrant rice.

关键词： Rice-duck co-culture 2-AP Proline Yield Grain quality Fragrant rice