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不同玄武岩掺量对沥青混合料抗滑性能影响研究

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公路工程 2024年第1期49卷 139-143,168页

作者：蒋进郜国凯陈桂锋刘中帅梅杰张飞黄光强孟云伟蔡宏奇贵州省安顺公路管理局贵州安顺561099 上海公路桥梁(集团)有限公司上海200433 招商局重庆交通科研设计院有限公司重庆400067 重庆交通大学交通运输学院重庆400074 重庆交通大学土木工程学院重庆400074

为深入分析不同玄武岩掺量的沥青混合料抗滑性能衰变规律,以贵州安顺地区的玄武岩和石灰岩为研究对象,进行AC-16型沥青混合料级配设计。利用加速加载试验仪对不同玄武岩掺量的沥青混合料进行室内抗滑试验,分析不同水流量和荷载对沥青路... 详细信息

为深入分析不同玄武岩掺量的沥青混合料抗滑性能衰变规律,以贵州安顺地区的玄武岩和石灰岩为研究对象,进行AC-16型沥青混合料级配设计。利用加速加载试验仪对不同玄武岩掺量的沥青混合料进行室内抗滑试验,分析不同水流量和荷载对沥青路面抗滑性能的影响,试验结果表明掺玄武岩试样的摆值下降程度比纯石灰岩方案的小。此外,采用国际摩阻指数IFI评价沥青路面的抗滑性能衰变规律,5种方案在前3小时内均可以满足抗滑性能要求,且方案一和纯玄武岩方案的抗滑性能明显优于其他三组的抗滑性能,说明合理的玄武岩掺量能提升沥青混合料的抗滑性能。

关键词：沥青混合料玄武岩掺量抗滑性能国际摩阻指数加速磨耗试验

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结合暗通道先验的光补偿快速去雾算法

计算机工程与科学 2018年第11期40卷 2033-2039页

作者：杨燕张宝山周杰陈高科兰州交通大学电子与信息工程学院甘肃兰州730070

针对暗通道先验单幅图像去雾算法去雾不彻底、天空区域偏色严重且去雾速度慢等问题,提出了一种结合暗通道先验的光补偿快速去雾算法。首先将二阶Butterworth高通滤波器引入同态滤波函数,在频域内对最小颜色分量进行增强,同时,平滑最小... 详细信息

针对暗通道先验单幅图像去雾算法去雾不彻底、天空区域偏色严重且去雾速度慢等问题,提出了一种结合暗通道先验的光补偿快速去雾算法。首先将二阶Butterworth高通滤波器引入同态滤波函数,在频域内对最小颜色分量进行增强,同时,平滑最小颜色分量中的光照,补偿局部区域因光照不足引起的图像质量下降;然后用双边滤波对其进行平滑处理,使光照在最小颜色分量图像上过渡更加自然;最后将处理之后的最小颜色分量作为引导图细化初始透射率。实验结果表明,与Tarel算法和中值滤波算法相比,该算法得到的去雾图像具有更好的视觉效果;与引导滤波算法相比,该算法去雾效果更为彻底,天空区域颜色还原准确,且运算速度更快。

关键词：暗通道先验同态滤波透射率最小颜色分量

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城市螺旋隧道群开挖对邻近建筑物的影响分析

重庆交通大学学报（自然科学版） 2022年第4期41卷 105-112页

作者：高峰吴佳鑫石龙飞贾山何江重庆交通大学土木工程学院重庆400074 中国建筑第八工程局有限公司上海200135

城市地下大跨度多层重叠隧道在建设中会穿过或临近大量的既有构筑物,其破坏形态、荷载分布和隧道间的相互作用极为复杂。以重庆解放碑地下停车库及连接通道三期工程为研究背景,通过有限元法数值模拟并进行定性、定量分析,研究了螺旋隧... 详细信息

城市地下大跨度多层重叠隧道在建设中会穿过或临近大量的既有构筑物,其破坏形态、荷载分布和隧道间的相互作用极为复杂。以重庆解放碑地下停车库及连接通道三期工程为研究背景,通过有限元法数值模拟并进行定性、定量分析,研究了螺旋隧道群施工对围岩和地表建筑物的影响;通过现场监测数据对比分析,确定了隧道群的展线方案和最优的开挖顺序和方法,并为类似工程提供借鉴指导。

关键词：隧道工程螺旋隧道群地表建筑物展线方案开挖顺序开挖方法

Effect of Oils on SBS Modified Asphalt:Rheological Characteristics and Oxidation Aging

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Journal of Renewable Materials 2023年第3期11卷 1339-1351页

作者： Jing Xu Yuquan Yao Kai Zhang Jiangang Yang Jie gao Jian Zhou Jiangxi Transportation Institute Co. Ltd.Nanchang330200China school of civil engineering and Architecture East China Jiaotong UniversityNanchang330013China school of Highway Chang’an UniversityXi’an710064China

This study focuses on the effect of oils on rheology and oxidation aging of Styrene-Butadiene-Styrene modified asphalt(SBSMA)in the long term,after reducing one low-temperature Performance Grade(PG)of SBSMA by incorporating *** oils,including corn-based bio-oil and re-refined engine oil bottom(REOB),were selected to enhance the low-temperature performance of *** samples were subjected to Rolling Thin Film Oven(RTFO)aging and 20-h as well as 40-h Pressure Aging Vessel(PAV20 and PAV40)aging,prior to multiple stress creep recovery(MSCR),frequency sweep and Flourier transform infrared spectroscopy(FTIR)scanning.A good high-temperature performance of oil/SBS modified asphalt blends was reflected in MSCR and PG results,meanwhile non-recoverable creep compliance(Jnr)and recovery(R)were found to share a highly correlated relationship during aging *** addition,Glover–Rowe(G–R)parameter and phase angle master curves suggest that the improvement of cracking property mainly came from the softening effect of *** oils into SBSMA was observed to increase oxidation kinetics,but the blends with oils still exhibited better anti-oxidation aging than the base binder,mainly due to the SBS ***-oil exhibited an effect of relieving age hardening susceptibility of SBSMA.

关键词： Oil aging rheology oxidation kinetics cracking resistance

进展中的纤毛虫学研究:新格局、新窗口与新拓展

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中国海洋大学学报（自然科学版） 2019年第10期49卷 28-42页

作者：胡晓钟赵研黄洁高凤高珊邵晨宋微波中国海洋大学海洋生物多样性与进化研究所山东青岛266003 首都师范大学生命科学学院北京100048 中国科学院水生生物研究所水生生物多样性与保护重点实验室湖北武汉430072 西安交通大学生命科学与技术学院陕西西安710049

本文综述了作者及所在团队近30年来在海洋纤毛虫领域所取得的系列创新型研究成果。主要概括如下:(1)开拓了中国沿海自由生活类群的区系分类、生态学以及养殖动物病原学等研究,覆盖了温带、热带海区各生境中纤毛门内40余目级阶元,构建了... 详细信息

本文综述了作者及所在团队近30年来在海洋纤毛虫领域所取得的系列创新型研究成果。主要概括如下:(1)开拓了中国沿海自由生活类群的区系分类、生态学以及养殖动物病原学等研究,覆盖了温带、热带海区各生境中纤毛门内40余目级阶元,构建了我国长期缺失的海洋类群的物种与基因多样性资料,阐述了特定时空格局下的区系构成与群落演替规律以及主要海水养殖动物的危害性病原等,建立了包括新纲、新目、新科、新属和新种等在内的大量新阶元,系统地描述了近千种的形态分类学信息;(2)完成了1 700余种/种群DNA库、1 400余条标记基因库等纤毛虫遗传资料库的构建;在标记基因序列分析基础上,对纤毛门13个纲、55个目级阶元的系统发育进行了深层次的梳理和探讨,解答了纤毛虫系统演化、阶元定位等方面的诸多科学问题;(3)在细胞发生学研究方面,以腹毛类纤毛虫为材料,围绕无性生殖期间的个体发育,研究刻画了100余种-属的细胞分化与模式构建过程,揭示了大量发生学新现象并形成了领域内首部全视角专著《腹毛类纤毛虫的细胞发生模式》;(4)在基因组学与基因进化研究方面,针对进化地位特殊、环境依赖以及类群代表性种类,阶段性地完成了近百种单细胞基因组的常规测序和6个种的深度分析,研究揭示了钩刺斜管虫大小核基因重组模式等进化生物学新现象;(5)在基因条形码研究方面,以重要模式生物游仆虫属、草履虫属等类群为材料,开展了DNA条形码的筛选和技术优化探索,提出了COI基因和28S rRNA基因D1~D2区可有效刻画近缘种或隐存种这一新观点;(6)在表观遗传学研究方面,探讨了四膜虫组蛋白单甲基化酶TXR1对复制延伸的影响、N6-腺嘌呤甲基化的全基因组分布模式及决定因素、反式和顺式作用元件对核小体分布的协同作用以及RNAi和Polycomb通路关键蛋白对转座子沉默与激活的调控作用与机制。上述研究成果历史性地改变了纤毛虫学研究格局,极大地提升了我国原生动物学研究的国际地位。

关键词：纤毛门原生动物生物多样性与系统学表观遗传学基因条形码组学基因进化

A five-compartment model of age-specific transmissibility of SARS-CoV-2

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Infectious Diseases of Poverty 2020年第4期9卷 35-49页

作者： Ze-Yu Zhao Yuan-Zhao Zhu Jing-Wen Xu Shi-Xiong Hu Qing-Qing Hu Zhao Lei Jia Rui Xing-Chun Liu Yao Wang Meng Yang Li Luo shan-shan Yu Jia Li Ruo-Yun Liu Fang Xie Ying-Ying Su Yi-chen Chiang Ben-Hua Zhao Jing-An Cui Ling Yin Yan-Hua Su Qing-Long Zhao Li-Dong gao Tian-Mu chen State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics School of Public HealthXiamen University4221-117 South Xiang'an RoadXiang'an DistrictXiamen City 361102Fujian ProvincePeople's Republic of China Hunan Provincial Center for Disease Control and Prevention 405 Furong Middle Road Section OneKaifu DistrictChangsha City 410001Hunan ProvincePeople's Republic of China Division of Public Health School of MedicineUniversity of Utah201 Presidents CircleSalt Lake CityUT 84112USA Department of Mathematics School of ScienceBeijing University of Civil Engineering and ArchitectureBeijingPeople's Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhenGuangdong ProvincePeople's Republic of China Jilin Provincial Center for Disease Control and Prevention 3145 Jingyang Big RoadLvyuan DistrictChangchun 130062Jilin ProvincePeople's Republic of China

Background:The novel coronavirus,severe acute respiratory syndrome coronavirus 2(SARS-CoV-2,also called 2.19-nCoV)causes different morbidity risks to individuals in different age *** study attempts to quantify the age-specific transmissibility using a mathematical ***:An epidemiological model with five compartments(susceptible-exposed-symptomatic-asymptomatic-recovered/removed[SEIAR])was developed based on observed transmission *** disease 2.19(COVID-19)cases were divided into four age groups:group 1,those≤14years old;group 2,those 15 to 44years old;group 3,those 45 to 64years old;and group 4,those≥65 years *** model was initially based on cases(including imported cases and secondary cases)collected in Hunan Province from January 5 to February 19,*** dataset,from Jilin Province,was used to test the ***:The age-specific SEIAR model fitted the data well in each age group(P1).In Hunan Province,the highest transmissibility was from age group 4 to 3(median:β43=7.71×10-9;SAR43=3.86×10-8),followed by group 3 to 4(median:β34=3.07×10-9;SAR34=1.53×10-8),group 2 to 2(median:β22.1.24×10-9;SAR22=6.21×10-9),and group 3 to 1(median:β31=4.10×10-10;SAR31=2.08×10-9).The lowest transmissibility was from age group 3 to 3(median:β33=1.64×10-19;SAR33=8.19×10-19),followed by group 4 to 4(median:β44=3.66×10-17;SAR44=1.83×10-16),group 3 to 2(median:β32.1.21×10-16;SAR32=6.06×10-16),and group 1 to 4(median:β14=7.20×10-14;SAR14=3.60×10-13).In Jilin Province,the highest transmissibility occurred from age group 4 to 4(median:β43=4.27×10-8;SAR43=2.13×10-7),followed by group 3 to 4(median:β34=1.81×10-8;SAR34=9.03×10-8).Conclusions:SARS-CoV-2 exhibits high transmissibility between middle-aged(45 to 64 years old)and elderly(≥65 years old)***(≤14 years old)have very low susceptibility to *** study will improve our understanding of the transmission feature of SARS-CoV-2 in different age groups and suggest the most pre

关键词： Transmissibility SARS-CoV-2 COVID-19 Compartmental model Age-specific dynamics

Study on anaerobic co-digestion with distillery wastewater to improve the dewatering property of the secondary sludge

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Journal of Life Sciences 2007年第1期1卷 60-66页

作者： TAI Ming-qing chen Jie-rong CHANG Chein-chin gao Jun-lin school of Life and Technology Xi＇an Jiaotong University Xi ＇an 710049 China Department of civil and Environmental engineering University of Maryland Baltimore County Maryland 21042 USA Henan Polytechnical Institute Nanyang 473009 China

This paper presents the results obtained for the effluent dewatering properties of anaerobic digestion of secondary sludge （SS） and anaerobic co-digestion of mixture of this sludge with the distillery wastewater （DW） under thermophilic （55±1 ℃）, 5 L of working volume, three parallel lab-scale conditions. Its mixtures were prepared with a DW content of 25%and 50% and the C/N ratios of mixtures are 13.1 and 17.6, respectively. The effluent dewatering properties were evaluated under stable conditions which the biogas yield and the effluent pH were steady. The natural settleability, biogas yield, centrifugal dewatering, centrifugal supernatant turbidity and specific resistance filtration （SRF） were investigated. The results showed that the effluent dewatering properties of anaerobic co-digestion of mixtures between SS and DW were better than that of anaerobic digestion of SS alone. In the anaerobic digestion system with the feed were SS, mixture of SS and a DW content of 25%and 50% in order, the net biogas yield of secondary sludge in ADSA,ADSB and ADSC were 0.42 0.507 and 0.511 m3 biogass/***.d ; compared with the biogas yield in anaerobic digestion system A （ADSA）, the biogas yield in anaerobic digestion system B （ADSB） and anaerobic digestion system C （ADSC） had been increased by more than 20% respectively; the SRF of three digested sludge are（were） from 6.8×10^13, 1. 1×10^13 to 5.1×10^12 m/Kg, natural settling rates of 12 h are 26, 37 and 56% and that of 24 h are 32%, 45% and 59% respectively; the centrifugal dewatering rate of 3 min at speed of 1000 rpm were 16%, 31% and 51% respectively; the turbidity of centrifugal supernatant were 804, 754 and 678FTU simultaneously.

关键词： anaerobic co-digestion secondary sludge distillerywastewater dewatering property

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基于模型参考自适应的自学习悬浮控制策略

西南交通大学学报 2023年第4期58卷 799-807页

作者：陈萍史天成于明月单磊沈阳航空航天大学民用航空学院辽宁沈阳110136 沈阳航空航天大学自动化学院辽宁沈阳110136 山东和顺电气有限公司山东肥城271600

针对电磁悬浮列车悬浮控制器因轨道不平顺所引发的未知非线性力和传递函数不确定问题,提出一种基于模型参考自适应的自学习控制方案,控制算法中可调参数根据系统状态、误差和时间调整,使悬浮间隙稳定在恒定数值;学习率根据目标间隙误差... 详细信息

针对电磁悬浮列车悬浮控制器因轨道不平顺所引发的未知非线性力和传递函数不确定问题,提出一种基于模型参考自适应的自学习控制方案,控制算法中可调参数根据系统状态、误差和时间调整,使悬浮间隙稳定在恒定数值;学习率根据目标间隙误差大小动态调节,避免可调参数调节过慢,同时保证在稳定悬浮时间隙波动更小;通过李雅普诺夫稳定性判据证明了模型参考自适应控制系统的稳定性;通过MATLAB/Simulink对所提出的控制方案进行仿真.研究结果表明:自学习模型参考自适应控制算法间隙的均方根误差为0.12,设定合适的可调参数初始值并对其限幅能够提升控制器的鲁棒性;在单悬浮架测试时,控制器获取到加速度信号,所提出算法的上升时间和调节时间分别为1.21 s和2.04 s,该方法学习率可动态调节,提升了控制器的适应能力.

关键词：磁浮列车悬浮控制模型参考自适应李雅普诺夫函数

Prevalence of Acne Inversa(Hidradenitis Suppurativa)in china:A Nationwide Cross-Sectional Epidemiological Study

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International Journal of Dermatology and Venereology 2022年第1期5卷 1-7页

作者： Zhong-Shuai Wang Jing Li Qiang Ju Wei Lai Song-Mei Geng Xiao-Jing Kang Xian Jiang Hong-Zhong Jin Hong-Fu Xie Qing Sun Hang Li shan-shan Li chen Yuan Li He Hong Fang Gang Wang Juan Tao Xing-Hua gao Yan wu You-Kun Lin Yu-Zhen Li Jun Gu Yan Yan Baoxi Wang Department of Dermatology Plastic Surgery HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100144China Institute of Dermatology Chinese Academy of Medical Sciences and Peking Union Medical CollegeNanjingJiangsu 210042China Department of Dermatology Renji HospitalShanghai Jiaotong University School of MedicineShanghai 200127China Department of Dermatology The Third Affiliated HospitalSun Yat-Sen UniversityGuangzhouGuangdong 510630China Department of Dermatology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710004China Department of Dermatology People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqiXinjiang 830001China Department of Dermatology West China HospitalSichuan UniversityChengduSichuan 610041China Department of Dermatology Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Dermatology Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Dermatology Qilu Hospital of Shandong UniversityJinanShandong 250012China Department of Dermatology Peking University First HospitalBeijing 100034China Department of Dermatology the First Bethune Hospital of Jilin UniversityChangchunJilin 130021China Department of Dermatology First Affiliated Hospital of Kunming Medical UniversityKunmingYunnan 650032China Department of Dermatology the First Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310003China Department of Dermatology Xijing HospitalAir Force Medical University of PLAXi’anShaanxi 710032China Department of Dermatology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022China Department of Dermatology the First Hospital of China Medical UniversityShenyangLiaoning 110001China Department of Dermatology the First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi 530021China Department of Dermatology t

Objective:This study was performed to estimate the prevalence of hidradenitis suppurativa(HS)in china and describe the demographic and clinical features of HS in the Chinese ***:This multicenter clinic-based cross-sectional study was conducted in dermatology clinics within 19 hospitals located in 15 cities/provinces across china from September to October *** prevalence of HS was calculated as the percentage of patients with HS among all visitors at participating clinics during the 1-month study *** was independently diagnosed by two certified dermatologists at each *** visitors at participating clinics were screened,and all patients with HS were invited to participate in a questionnaire survey to elucidate the demographics and clinical features of HS in the Chinese ***:We identified 92 patients with HS among 274,742 visitors at participating *** prevalence rate was 0.03349%or 33.49 per 100,000 population(95%confidence interval,26.64–40.32),and the female:male ratio was 1.0:***:The overall prevalence of HS in china was lower than that in Western and other Asian countries with a predominance of male patients.

关键词： acne inversa/hidradenitis suppurativa epidemiology china