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Hyperextended crustal structure of the Qiongdongnan Basin and subsequent magmatic influence from the Hainan mantle plume

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Science China Earth Sciences 2022年第5期65卷 845-862页

作者： shaohong XIA Chaoyan FAN Dawei WANG Jinghe CAO Fang ZHAO Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Sanya Institute of Oceanology SCSIOSanya 572100China Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanya 572000China

The Qiongdongnan Basin(QDNB)is a rift basin located in the extension direction of the oceanic ridge of the Northwest Subbasin of the South China *** basin is surrounded by Late Cenozoic Ocean Island Basalts(OIBs)magmatism associated with the putative Hainan mantle ***,how the Hainan mantle plume has affected the QDNB has not been studied in *** reveal the crustal structure of the QDNB and the possible influence of the Hainan mantle plume,we conducted a wide-angle seismic exploration from Hainan Island across the QDNB to the Xisha Block,and obtained the crustal structure by travel-time *** results show that the crustal stretching factors of the Northern and Southern Rises of the QDNB are estimated to be 1.3-2.0,indicating slight or moderate crustal ***,the crustal stretching factor in the Central Depression of the QDNB is estimated to be more than 3.0,which means that the crust has been *** by two detachment faults(F2 and F11),the upper and lower crust show brittle and ductile thinning,*** anomalous low-velocity conduits penetrating the crystalline crust are developed in the Songnan Uplift and the Southern Rise of the *** P-wave velocities are 5.5-6.0 km s^(−1),which are significantly lower than those of the surrounding crust(6.0-6.8 km s^(−1)).The Late Cenozoic magmatic intrusions(e.g.,sills and dikes)and hydrothermal activities can be observed in the sedimentary strata above these low-velocity *** interpret that the low-velocity conduits might be the crustal magmatic footprints of the Hainan mantle plume,due to the correlated distributions of OIB-type magmatism,the magmatic intrusion patterns,the deep structure of the Hainan mantle plume and the high heat flow of 95 mW m^(−2).Thus,we propose that the crustal structure of the QDNB is the product of crustal hyperextension in the rifting stage and subsequently affected by the Hainan mantle plume *** study provide

关键词： Crustal structure Hyperextension Magmatism Hainan mantle plume Qiongdongnan Basin

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基于跨校修读学分的“材料与设计”课程体系建设

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工业设计 2024年第6期 100-103页

作者：高崇高宏博李少宏沈阳航空航天大学设计艺术学院沈阳110136

随着互联网技术的进步,依托网络教学平台的跨校修读学分新型教育模式,在我国高等院校逐渐兴起,该模式为高校教学模式的改革与创新指出了新的方向。文章在分析跨校修读学分模式优势的基础上,深入探讨该模式存在的突出问题,提出针对性的... 详细信息

随着互联网技术的进步,依托网络教学平台的跨校修读学分新型教育模式,在我国高等院校逐渐兴起,该模式为高校教学模式的改革与创新指出了新的方向。文章在分析跨校修读学分模式优势的基础上,深入探讨该模式存在的突出问题,提出针对性的解决策略。同时,针对工业设计专业的“材料与设计”课程,阐述了如何在跨校修读学分的过程中选择跨校修读资源、确定课程教学目标、调整课程内容体系、改革教学方法及学生成绩考核与课程评价方式。以期构建适合基于跨校修读学分的“材料与设计”课程体系,有效促进优质教育资源的共享。

关键词：工业设计跨校修读学分材料与设计课程体系建设教育资源共享

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设施切花百合与水果黄瓜高效轮作栽培技术

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北方园艺 2024年第9期 147-152页

作者：吴然李燕韩江伟张晓英薛少红宋聚红石家庄市农林科学研究院河北石家庄050021 石家庄市种子管理站河北石家庄050000

针对设施利用率低和百合连作障碍严重问题,石家庄市农林科学研究院连续3年在平山县合河口乡开展切花百合与设施水果黄瓜轮作栽培模式研究,总结出适宜冀西太行山区的设施春季切花百合与秋季水果黄瓜高效轮作栽培技术,包括基础设施、茬口... 详细信息

针对设施利用率低和百合连作障碍严重问题,石家庄市农林科学研究院连续3年在平山县合河口乡开展切花百合与设施水果黄瓜轮作栽培模式研究,总结出适宜冀西太行山区的设施春季切花百合与秋季水果黄瓜高效轮作栽培技术,包括基础设施、茬口安排、春季切花百合栽培技术、秋季水果黄瓜栽培技术、效益情况和适宜区域。利用该技术生产的切花百合可以满足‘五一’期间市场对鲜切花的需求,同时在秋冬季节为消费者提供优质水果黄瓜,每667 m2总收益达22350元。

关键词：切花百合水果黄瓜设施轮作

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海洋大气环境下镁合金腐蚀行为研究进展

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稀有金属材料与工程 2024年第4期53卷 1170-1180页

作者：周慧敏黄须强孔令菲陈建鑫高飞刘绍红陈民芳张晋铁镝东北大学材料科学与工程学院辽宁沈阳110819 天津理工大学材料科学与工程学院天津300384 大连交通大学连续挤压教育部工程研究中心辽宁大连116028

本文综合研究了海洋大气环境下镁合金腐蚀行为的研究进展,比较分析了各种因素对腐蚀行为的影响,对当前研究进展进行总结并对未来研究方向进行展望。在海洋大气环境下,表面薄电解质溶液膜的包覆是镁合金发生电化学腐蚀的主要原因,且多发... 详细信息

本文综合研究了海洋大气环境下镁合金腐蚀行为的研究进展,比较分析了各种因素对腐蚀行为的影响,对当前研究进展进行总结并对未来研究方向进行展望。在海洋大气环境下,表面薄电解质溶液膜的包覆是镁合金发生电化学腐蚀的主要原因,且多发生局部腐蚀。相比于内陆大气环境,海洋大气中含有较多无机盐气溶胶颗粒,导致点蚀成为主要的局部腐蚀形式。相对湿度的升高会导致薄电解质膜厚度增加,进而加速整体腐蚀速率。随气温上升,镁合金的大气腐蚀速率线性增加,而空气中的CO_(2)可以抑制NaCl对镁合金的侵蚀。该领域未来需更多关注具体使役环境下合金的腐蚀机理,以及各种环境因素对腐蚀行为的协同作用机制,以指导海洋用镁合金材料的设计和制备。

关键词：镁合金海洋环境腐蚀大气腐蚀局部腐蚀

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Simulation study on dynamics of cylindrical gear meshing with the evolution meshing stiffness

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仪器仪表学报 2016年第S1期37卷 146-151页

作者： Ma Chao Liu Lingtao Wang shaohong Xu Xiaoli Peng Yumin Beijing Information Science and Technology University

Simulation study on the cylindrical gear meshing with the evolution gear meshing stiffness is being done for better understanding the dynamic characteristics of the *** consideration of damping,bearing clearance and gear backlash nonlinearity,the dynamic model is set up and computed in *** analysis about the relationship between the kinematic responses and the meshing stiffness are carried *** the results showed that as the gear mesh stiffness is changed from small to large,the performance of the system is changed from the harmonic stable periodic motion to with one times,two times,four times,ending chaos of the stability of the *** research results would have theoretical guidance value for the fault diagnosis in engineering.

关键词： cylindrical gear meshing stiffness bifurcation

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Possible NPP changes and risky ecosystem region identification in China during the 21st century based on BCC-CSM2

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Journal of Geographical Sciences 2020年第8期30卷 1219-1232页

作者： ZHANG Chi WU shaohong LENG Guoyong Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China

Based on simulations by the Beijing Climate Center climate system model version 2(BCC-CSM2), the possible changes in net primary productivity (NPP) of the terrestrial ecosystemin China during the 21st century are explored under the Shared SocioeconomicPathway 2 (SSP2) 4.5 scenario. We found both the near-term and long-term terrestrial NPPbasically shows a unanimously increasing trend, which indicates low ecosystem productivityrisk in the future. However, the simple linear regression is insufficient to characterize thelong-term variation of NPP. Using the piecewise linear regression approach, we identify adecreasing trend of NPP in large areas for the latter part of the 21st century. In the northeastregion (NER) from east Inner Mongolia to west Heilongjiang province, NPP decreases significantlyafter 2059 at a rate of −0.9% dec-1. In the south region (SR) from Zhejiang toGuangxi provinces, a rapid decline of −2.4% dec-1 is detected after 2085. Further analysisreveals that the rapid decline in SR is primarily attributed to the decrease in precipitation, withtemperature playing a secondary role, while the NPP decline in NER seems to have no evidentrelations with climate change. These findings are useful for making preparations forpotential ecosystem crisis in China in the future.

关键词： climate change NPP ecosystem risk turning point SSP245

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一款基于非线性模型设计的高性能GaN功率放大载片

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固体电子学研究与进展 2024年第4期44卷 277-283页

作者：景少红徐祖银李飞成爱强梁宸玮南京电子器件研究所南京210016

采用南京电子器件研究所研制的0.35μm栅长、60 V高压AlGaN/GaN HEMT工艺,利用可缩放大信号模型仿真设计了一款工作在S波段的高性能功率放大载片。该功率放大载片由单个总栅宽为36.4 mm的GaN管芯采用混合集成内匹配方案设计而成,漏极工... 详细信息

采用南京电子器件研究所研制的0.35μm栅长、60 V高压AlGaN/GaN HEMT工艺,利用可缩放大信号模型仿真设计了一款工作在S波段的高性能功率放大载片。该功率放大载片由单个总栅宽为36.4 mm的GaN管芯采用混合集成内匹配方案设计而成,漏极工作电压为60 V,工作频带为2.7~3.5 GHz。测试结果表明,在环境温度300 K,脉宽250μs、占空比15%的脉冲测试条件下,功率放大载片在工作频带内最大饱和输出功率为354.8 W,最大功率附加效率为61%,功率增益大于14.7 dB,显示了GaN器件的高工作电压、高功率密度、宽工作频带等特性。

关键词： AlGaN/GaN 高电子迁移率晶体管非线性模型功率放大载片

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急诊失血性休克患者中心静脉导管相关性血流感染的危险因素

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中华急诊医学杂志 2024年第5期33卷 683-689页

作者：朱建平许严新吴绍宏王飞瑶张伟星王瑞兰上海交通大学附属第一人民医院危重病科上海201620

目的分析探讨急诊失血性休克患者中心静脉导管感染的危险因素及病原学特点。方法回顾性分析上海市第一人民医院2016年6月至2022年6月急诊收治的失血性休克并行中心静脉置管的患者,根据是否发生导管相关性血流感染分为感染组和无感染组,... 详细信息

目的分析探讨急诊失血性休克患者中心静脉导管感染的危险因素及病原学特点。方法回顾性分析上海市第一人民医院2016年6月至2022年6月急诊收治的失血性休克并行中心静脉置管的患者,根据是否发生导管相关性血流感染分为感染组和无感染组,采集感染患者的穿刺部位样本及导管头端样本进行病原学检测和药敏试验。分析两组各项基线资料的差异,并以多因素Logistic回归分析中心静脉导管相关性感染与各项影响因素的关系。结果本研究共纳入患者249例,感染组54例,无感染组195例。感染组年龄、置管位置、失血量、超声引导下穿刺、高急性生理功能和慢性健康情况Ⅱ评分(acute physiology and chronic health evaluationⅡscore,APACHEⅡ评分)、导管留置时间和应用广谱抗生素与无感染组相比较差异有统计学意义(均P<0.05)。多因素Logistic回归分析结果显示,高龄、股静脉置管、未在超声引导下穿刺、APACHEⅡ评分、较长的导管留置时间、应用广谱抗生素为中心静脉导管相关性血流感染的独立危险因素。54例感染患者送检标本检出病原菌中以表皮葡萄球菌最多占44.4%,其次为大肠埃希菌占24.1%,真菌占11.1%;革兰阳性球菌对万古霉素的耐药率最低为3.4%,其次是四环素为34.5%,对阿莫西林的耐药率最高为100.0%;革兰阴性杆菌对阿米卡星以及头孢曲松的耐药率相对较高,均为94.7%。结论急诊失血性休克患者中心静脉导管相关性血流感染的危险因素包括高龄、股静脉置管、未在超声引导下穿刺、较高的APACHEⅡ评分、导管留置时间过长、应用广谱抗生素;常见的病原菌为表皮葡萄球菌和大肠埃希菌。

关键词：失血性休克中心静脉置管导管相关性血流感染病原学耐药性

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Spatio-temporal variation of the wet-dry conditions from 1961 to 2015 in China

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Science China Earth Sciences 2017年第11期60卷 2041-2050页

作者： YUAN QuanZhi WU shaohong DAI ErFu ZHAO DongSheng ZHANG XueRu REN Ping Key Lab of Land Resources Evaluation and Monitoring in Southwest Ministry of EducationSichuan Normal UniversityChengdu 610068China Institute of Geography and Resources Science Sichuan Normal UniversityChengdu 610101China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China College of Architecture and Urban Planning Chongqing Jiaotong UniversityChongqing 400074China School of Public Administration Hebei University of Economics and BusinessShijiazhuang 050061China

As an important part of the regional environment, the wet-dry climate condition is determined by precipitation and potential evapotranspiration （expressed as ETo）. Based on weather station data, this study first calculated ETo by using the FAO56 Penrnan-Monteith model. Then, the dryness index K （ratio of ETo to precipitation） was used to study the spatio-temporal variation of the wet-dry condition in China from 1961 to 2015; moreover, dominant climatic factors of the wet-dry condition change were discussed. The annual precipitation and ETo of the Qinling-Huaihe line were close to a balance （K≈1.0）. The annual precipitation in most areas exceeded the ETo in the south of this line and the east of Hengduan Mountains （K〈0.0）, where the climate is wet. Furthermore, the precipitation in the northwest inland areas of China, where the climate is dry, was markedly lower than ETo （K≥4.0）. The overall annual K of China fluctuated around the 55-year mean and its linear trend was not significant. However, a relatively wet period of about 10 yr （1987-1996） was recorded. The overall annual K of China showed strong cyclicality on the time scale of 3, 7-8, 11 and 26-28 yr, and regional differences of the annual K trends and cyclicality were large. The degrees of wetness in the Northwest China and western Qinghai-Tibet Plateau were substantially increased, whereas the degrees of dryness in the Yunnan-Guizhou Plateau, Sichuan Basin, and Loess Plateau were markedly increased. The linear trend of the annual K in most regions of China was not significant, and the annual K of most areas in China showed strong cyclicality on the 8-14 yr time scale. Precipitation was the dominant factor of wet-dry condition change in most areas, especially in North China, where the annual K change was highly correlated with precipitation.

关键词： Wet-dry condition Climate dryness index Potential evapotranspiration Climate change China

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Nitrogen-doped carbon encapsulated in mesoporous TiO2 nanotubes for fast capacitive sodium storage

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Journal of Energy Chemistry 2021年第4期30卷 202-210页

作者： Baosong Li Shoaib Anwer Xinhua Huang shaohong Luo Jing Fu Kin Liao Department of Aerospace Engineering Khalifa University of Science and TechnologyAbu Dhabi127788United Arab Emirates Department of Mechanical Engineering Khalifa University of Science and TechnologyAbu Dhabi127788United Arab Emirates Department of Biomedical Engineering Khalifa University of Science and TechnologyAbu Dhabi127788United Arab Emirates

Controllable synthesis of insertion-type anode materials with beneficial micro-and nanostructures is a promising approach for the synthesis of sodium-ion storage devices with high-reactivity and excellent electrochemical *** this study,we developed a sacrificial-templating route to synthesize TiO_(2)@N-doped carbon nanotubes(TiO_(2)@NC-NTs)with excellent electrochemical *** asprepared mesoporous TiO_(2)@NC-NTs with tiny nanocrystals of anatase TiO_(2) wrapped in N-doped carbon layers showed a well-defined tube structure with a large specific surface area of 198 m^(2) g^(-1) and a large pore size of~5 *** TiO_(2)@NC-NTs delivered high reversible capacities of 158 m A h g^(-1) at 2 C(1 C=335 m A g^(-1))for 2200 cycles and 146 m A h g^(-1) at 5 C for 4000 cycles,as well as an ultrahigh rate capability of up to 40 C with a capacity of 98 m A h g^(-1).Even at a high current density of 10 C,a capacity of 138 m A h g^(-1) could be delivered over 10,000 ***,the synthesis of mesoporous TiO_(2)@NC-NTs was demonstrated to be an efficient approach for developing electrode materials with high sodium storage and long cycle life.

关键词： TiO2 nanotubes MoO3 template Nitrogen-doped carbon Anode Sodium-ion battery

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