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Provenance of Uranium Mineralization of the Yuqia Area,Northwest China:Constraints from Detrital Zircon U-Pb Geochronology and Hf Isotopes

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Journal of Earth Science 2022年第6期33卷 1549-1570页

作者： Guangwen Huang Jiayong Pan Fei Xia Jie Yan chengyong Zhang Dehai wu Ying Liu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang330013China Key Laboratory of the Northern Qinghai-Tibet Plateau Geological Processes and Mineral Resources Xining810012China School of Resources Environment and JewelryJiangxi College of Applied TechnologyGanzhou341000China

Many sandstone-type uranium mineralization sites have been identified along the northern margin of the Qaidam Basin in North *** tectonism and multistage magmatism that occurred there have restricted the use of conventional techniques(petrogeochemistry)to deduce the sources of detritus and uranium in these sediments,and to further explore the sandstone-type uranium *** this study,U-Pb geochronological and Hf isotopic analyses were conducted on detrital zircon grains collected from Jurassic to Paleogene sandstones exposed in the Yuqia area of the Qaidam *** results indicate that the U-Pb ages of the analyzed zircon grains are clustered into four groups,285–229,498–401,999–806,and 2520–2305 ***ε_(Hf)(t)of the analyzed zircon grains ranges from-21.9 to+10.5,with two-stage Hf model ages(T_(DM2))concentrated between 2.1 and 1.3 *** on paleocurrent studies and results of petrological,detrital zircon geochronology,and Hf isotopic analyses,the Jurassic sediments in the Yuqia area were likely derived from the tectonic belt along the northern margin of the Qaidam Basin,such as the Qilian Mountains and the Quanji *** contrast,the Paleogene sediments were probably sourced from the northern margin of the Qaidam Basin and the Qilian *** uranium and thorium content and Th/U value of the rock mass and sedimentary strata in the source area show that the Indosinian Early Paleozoic uranium-rich granites and the Middle Jurassic uranium-rich strata of the northern margin of the Qaidam tectonic belt in the source area provide dual uranium sources for the Yuqia sandstone-type uranium ***,the study area appears to be favorable for sandstone-type uranium mineralization and may have potential for uranium prospecting.

关键词： uranium zircon U-Pb dating Hf isotope paleocurrent sandstone-type uranium deposit Qaidam Basin

腹腔镜下保留盆腔自主神经广泛性子宫切除术治疗早期宫颈癌疗效和安全性研究

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中国医药科学 2014年第5期4卷 67-69页

作者：杨海坤魏伟锋曾小倩吴成勇湛承华广东省梅州市人民医院妇产科广东梅州514003

目的研究腹腔镜下保留盆腔自主神经广泛性子宫切除术治疗早期宫颈癌的疗效和安全性。方法将早期宫颈癌患者纳入研究并随机分为给予腹腔镜下保留盆腔自主神经广泛性子宫切除术治疗的观察组和腹腔镜下常规广泛性子宫切术治疗的对照组,观... 详细信息

目的研究腹腔镜下保留盆腔自主神经广泛性子宫切除术治疗早期宫颈癌的疗效和安全性。方法将早期宫颈癌患者纳入研究并随机分为给予腹腔镜下保留盆腔自主神经广泛性子宫切除术治疗的观察组和腹腔镜下常规广泛性子宫切术治疗的对照组,观察手术相关指标及术后膀胱功能指标。结果两组患者的术中出血量、术后引流量、下床活动时间、住院总时间的差异无统计学意义(P>0.05);观察组的手术时间(155.6±30.4)min、最大排尿量(269.3±30.2)mL多于对照组,排尿次数(13.52±1.86)、残余尿量(63.8±7.24)mL、出现初始尿意(241.5±28.6)mL和强烈尿意时(456.5±51.8)mL的膀胱容量均少于对照组。结论腹腔镜下保留盆腔自主神经广泛性子宫切除术治疗早期宫颈癌安全、有效,能够促进术后膀胱功能的恢复。

关键词：宫颈癌腹腔镜子宫切除术盆腔自主神经

一种青海湖流域消除植被光谱对土壤光谱影响的土壤有机质含量遥感估算方法

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生态科学 2018年第5期37卷 60-71页

作者：吴成永曹广超陈克龙毛亚辉王琪袁杰鄂崇毅青海师范大学地理科学学院西宁810008 青藏高原环境与生态教育部重点实验室西宁810008 青海省自然地理与环境过程重点实验室西宁810008

基于遥感技术手段快速测定区域尺度土壤有机质含量(SOM),对气候、陆地生态系统和农业等领域具有重要的作用和意义。但现有的多光谱遥感影像因其波段宽度较窄,包含的土壤有机质信息有限,导致其估算结果的可靠性与精度较低。为此,以青海... 详细信息

基于遥感技术手段快速测定区域尺度土壤有机质含量(SOM),对气候、陆地生态系统和农业等领域具有重要的作用和意义。但现有的多光谱遥感影像因其波段宽度较窄,包含的土壤有机质信息有限,导致其估算结果的可靠性与精度较低。为此,以青海湖流域为实证试验区,将2016年9月底(此时,青海湖流域牧草等植被停止生长,土壤有机质积累达到全年最高)地面采集并测定的土壤有机质含量数据与同时期MODIS黑空BRDF/Albedo产品的宽、窄波段进行了对比与检验。发现:BRDF/Albedo宽波段的相关性(近红外、短波波段相关系数分别为0.704和0.670)高于窄波段相关性(第2, 5, 6波段的相关系数分别是0.583、0.631和0.625),证实了宽波段含有更加丰富、完整的土壤有机质含量信息。为了进一步提高SOM估算的精度,基于梯形方法构建了宽波段近红外反照率/植被覆盖度梯形特征空间,从宽波段近红外反照率(包含植被、土壤混合光谱)中成功分离出裸土反照率,并分别构建了SOM遥感估算模型。经验证,消除了植被对土壤光谱影响的裸土反照率模型精度(均方根误差为16.87、平均绝对百分比误差为30.0%,希尔不等系数为0.22)高于宽波段近红外反照率模型精度(均方根误差为20.12、平均绝对百分比误差为31.0%,希尔不等系数为0.27)。该方法简单易操作,不仅有助于提高表层土壤有机质含量遥感估算的精度,也可为土壤其他属性如N, P等元素含量的遥感估算提供了新思路。

关键词：土壤有机质遥感反演反照率梯形方法

A Universal Strategy For N-Doped 2D Carbon Nanosheets With Sub-Nanometer Micropore For High-Performance Supercapacitor

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Energy & Environmental Materials 2021年第4期4卷 569-576页

作者： Jiangqi Zhou Li Jiang chengyong Shu Long Kong Iqbal Ahmad Ya-Nan Zhou Wei Tang Xiaofei Sun Yuping wu State Key Laboratory for Mechanical Behavior of Materials School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi’an 710049China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory for Manufacturing Systems Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy ScienceNanjing Tech UniversityNanjing 211800China

Preparing carbon nanosheets with precise control of open porous morphology via universal process and understanding the relationship between structure and capacitive performance are very urgent for achieving advanced ***,we propose a simple yet effective additive-free method to transform a bulk layered potassium phthalimide salt to novel nitrogen-doped twodimensional carbon sheets by self-activation during *** obtained samples showed large-sized and flat structure with lateral size around 10μm,uniform sub-nanometer micropore size distribution of about 0.65 nm dimension,large specific surface area up to 2276.7 m^(2)g^(-1),and suitable nitrogen *** from these merits,the optimized sample delivers a high specific capacitance of 345 F g^(-1)at 1 A g^(-1)and retains 270 F g^(-1)even at 50 A g^(-1)in6.0 M KOH ***,the symmetric supercapacitor shows maximum energy densities of 16.43 Wh kg^(-1)and 23.6 Wh kg^(-1)in 6.0 M KOH and 1.0 M Na_(2)SO_(4)electrolytes,***,on account the universality and simplicity of this method,the undoped as-prepared carbon sheet with uniform sub-nanometer micropore distribution can be synthesized from different potassium-containing salts with layered structure,which can be employed as a model for a deep understanding the effect of sub-nanometer micropores on capacitive *** find the number of micropores centered at 0.65 nm can be applied as one indicator to clarify the correlation between capacitance and critical pore size below 1 nm.

关键词： universal strategy sub-nanometer micropore carbon nanosheet supercapacitors

Sandwich-type composited solid polymer electrolytes to strengthen the interfacial ionic transportation and bulk conductivity for all-solid-state lithium batteries from room temperature to 120℃

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Journal of Energy Chemistry 2024年第8期95卷 288-295,I0007页

作者： Jiewen Tan Zhen Wang Jiawu Cui Zhanhui Jia Wensheng Tian Chao wu Chengxin Peng chengyong Shu Kang Yang Wei Tang School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano) State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'an 710049ShaanxiChina State Key Laboratory of Space Power-sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Top-Energy Digital Manufacturing Technologies(Xi'an)Co. Ltd.Xi'an 710100ShaanxiChina

The insurmountable charge transfer impedance at the Li metal/solid polymer electrolytes(SPEs)interface at room temperature as well as the ascending risk of short circuits at the operating temperature higher than the melting point,dominantly limits their applications in solid-state batteries(SSBs).Although the inorganic filler such as CeO_(2)nanoparticle content of composite solid polymer electrolytes(CSPEs)can significantly reduce the enormous charge transfer impedance at the Li metal/SPEs interface,we found that the required content of CeO_(2)nanoparticles in SPEs varies for achieving a decent interfacial charge transfer impedance and the bulk ionic conductivity in *** this regard,a sandwich-type composited solid polymer electrolyte with a 10%CeO_(2)CSPEs interlayer sandwiched between two 50%CeO_(2)CSPEs thin layers(sandwiched CSPEs)is constructed to simultaneously achieve low charge transfer impedance and superior ionic conductivity at 30℃.The sandwiched CSPEs allow for stable cycling of Li plating and stripping for 1000 h with 129 mV polarized voltage at 0.1 mA cm^(-2)and 30℃.In addition,the LiFePO_(4)/Sandwiched CSPEs/Li cell also exhibits exceptional cycle performance at 30℃and even elevated120℃without short *** multi-layered CSPEs with optimized contents of the inorganic fillers can be an efficient method for developing all solid-state PEO-based batteries with high performance at a wide range of temperatures.

关键词： PEO-based solid electrolytes CeO_(2)nanoparticles Charge transfer impedance Sandwich-type composite electrolytes All-solid-state Li metal batteries

Chemical Mechanism of Flower Color Microvariation in Paeonia with Yellow Flowers

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Horticultural Plant Journal 2020年第3期6卷 179-190页

作者： Yong Yang Bing Li chengyong Feng Qian wu Qianyu Wang Shanshan Li Xiaonan Yu Liangsheng Wang Key Laboratory of Plant Resources/Beijing Botanical Garden Institute of BotanyChinese Academy of SciencesBeijing 100093China Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding National Engineering Research Center for FloricultureCollege of Landscape ArchitectureBeijing Forestry UniversityBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China

Paeonia species are important ornamental plants,including three types:tree peony,herbaceous peony,and Itoh hybrid *** with yellow color is desired and becoming ***,the chemical mechanism of the formation of yellow flowers in Paeonia is still *** this study,14 representative samples were selected:four samples of three species of Paeonia,four herbaceous peony cultivars,three lutea hybrid tree peony cultivars,and three Itoh hybrid peony *** petal extracts of the samples were determined by HPLC-DAD and HPLCQ-TOF-MS/*** total,29 flavonoids were isolated and identified,including 28 flavonol glycosides and one chalcone *** were significant differences in the composition and content of flavonoids in petals of different cultivars(species).The total content of flavonoids was between 19.430 and 143.043 mg·g^−1 *** glycosides were detected in all *** 2′-O-glucoside was detected from one herbaceous peony cultivar‘Golden Wheel’lutea hybrid tree peony cultivars,and Itoh peony *** content of chalconaringenin 2′-O-glucoside in the samples was more than 43% of total *** pigment type and content of lutea hybrid tree peonies and Itoh hybrid peonies are *** flavonoids,especially quercetin 3-O-galloylglucoside and chalconaringenin 2′-O-glucoside contribute greatly to the formation of yellow flowers of *** results of this study provide a comprehensive understanding of the chemical mechanism for yellow flower coloration of Paeonia,and lay the foundation for yellow flower breeding of Paeonia.

关键词： Paeonia Yellow flower HPLC Flavonoid composition Breeding

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异构集群下的MapReduce编程环境

科技创新导报 2016年第9期13卷 170-170页

作者：吴承勇崔慧敏中国科学院计算技术研究所

该报告针对Godson-D的芯片特征和亿级并发负载的特征,研究了层次化Map Reduce编程模型,对上层应用呈现简洁的编程接口,并利用Open CL来开发Godson-D芯片的计算能力。对其中的3个关键问题进行了阐述:形成了完整的层次化Map Reduce编程模... 详细信息

该报告针对Godson-D的芯片特征和亿级并发负载的特征,研究了层次化Map Reduce编程模型,对上层应用呈现简洁的编程接口,并利用Open CL来开发Godson-D芯片的计算能力。对其中的3个关键问题进行了阐述:形成了完整的层次化Map Reduce编程模型的框架,并实现了原型系统,旨在解决现有Map Reduce模型在多核/众核芯片组成的集群中存在的性能墙、在适用场景方面存在的无法适应增量式分析这两个主要的问题;为了解决Godson-D上的编程困难问题,该研究提出使用Open CL编写程序,并配套开发CPU+Godson-D异构系统中Open CL编译/运行时系统的解决方案。在该研究中,首先完成了Open CL编译/运行时支持系统的框架设计,该框架采用层次化设计思想,分为功能层、优化层、平台层;多核/众核处理器及云计算被认为将会统治计算领域的未来,多核/众核处理器在目前的云计算数据中心中被广泛采用,但是目前其资源利用率非常低,主要原因在于核间性能干扰的存在,使得数据中心的调度程序不得不禁止关键应用的co-location来保证Qo S,为此,提出了一种基于统计学习的多核间性能干扰分析方法,可以量化地分析任意程序遭受的核间性能干扰,并根据干扰模型提高资源的利用率。

关键词：异构集群编程环境异构芯片编译技术

Incidence,genomic diversity,and evolution of strawberry mottle virus in China

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BIOCELL 2021年第4期45卷 1137-1151页

作者： LINGJIAO FAN chengyong HE MENGMENG wu DEHANG GAO ZHENFEI DONG SHENGFAN HOU ZEKUN FENG HONGQING WANG College of Horticulture China Agricultural UniversityBeijing100193China

Strawberry mottle virus(SMoV)is one of the most common viruses infecting strawberries,causing losses to fruit yield and *** this study,165 strawberry leaf samples were collected from six provinces of China,46 of which tested positive for *** complete genome sequences of 11 SMoV isolates were obtained from Liaoning(DGHY3,DGHY16-2,DGHY17,DGHY20-2,DGHY21,DGHY26-2),Shandong(SDHY1,SDHY5,SDHY31-2,SDHY33-2),and Beijing(BJMX7).The RNA1 and RNA2 nucleotide identities between the 11 Chinese isolates were 95.4-99.3%and 96.3-99.6%,respectively,and they shared 78.4-96.6%and 84.8-93.5%identities with the available SMoV isolates in *** analysis revealed that Chinese isolate SDHY33-2 and Canadian isolates Ontario and Simcoe were recombinants,and recombination events frequently occurred in the 3’UTR of *** analysis showed that in an RNA1 tree,most Chinese isolates clustered into the same group while isolate DGHY17 clustered into another group together with Czech isolate C and three Canadian *** an RNA2 tree,all Chinese isolates clustered into a single *** phylogenetic analysis based on nucleotide sequences was consistent with the results based on coat protein(CP)and RNA-dependent RNA polymerase(RdRp).Further evolutionary analysis indicated that negative selection drives SMoV evolution,and gene flow plays a major role in genetic ***,reassortment and recombination also influence the evolution of *** our knowledge,this is the first report of the complete genome of SMoV isolates from China and a detailed analysis of the SMoV population structure.

关键词： Viral occurrence Complete genome Molecular variation Genetic structure

Metal-free two-dimensional phosphorene-based electrocatalyst with covalent P-N heterointerfacial reconstruction for electrolyte-lean lithium-sulfur batteries

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Carbon Energy 2024年第5期6卷 175-185页

作者： Jiangqi Zhou chengyong Shu Jiawu Cui Chengxin Peng Yong Liu Weibo Hua Laura Simonelli Yuping wu Shi Xue Dou Wei Tang School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'anChina School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghaiChina State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghaiChina CELLS-ALBA Synchrotron BarcelonaSpain School of Energy and Environment Southeast UniversityNanjingChina

The use of lithium-sulfur batteries under high sulfur loading and low electrolyte concentrations is severely restricted by the detrimental shuttling behavior of polysulfides and the sluggish kinetics in redox ***-dimensional(2D)few layered black phosphorus with fully exposed atoms and high sulfur affinity can be potential lithium-sulfur battery electrocatalysts,which,however,have limitations of restricted catalytic activity and poor electrochemical/chemical *** resolve these issues,we developed a multifunctional metal-free catalyst by covalently bonding few layered black phosphorus nanosheets with nitrogen-doped carbon-coated multiwalled carbon nanotubes(denoted c-FBP-NC).The experimental characterizations and theoretical calculations show that the formed polarized P-N covalent bonds in c-FBP-NC can efficiently regulate electron transfer from NC to FBP and significantly promote the capture and catalysis of lithium polysulfides,thus alleviating the shuttle ***,the robust 1D-2D interwoven structure with large surface area and high porosity allows strong physical confinement and fast mass ***,with c-FBP-NC as the sulfur host,the battery shows a high areal capacity of 7.69 mAh cm^(−2) under high sulfur loading of 8.74 mg cm^(−2) and a low electrolyte/sulfur ratio of 5.7μL mg^(−1).Moreover,the assembled pouch cell with sulfur loading of 4 mg cm^(−2) and an electrolyte/sulfur ratio of 3.5μL mg^(−1) shows good rate capability and outstanding *** work proposes an interfacial and electronic structure engineering strategy for fast and durable sulfur electrochemistry,demonstrating great potential in lithium-sulfur batteries.

关键词： black phosphorus electronic structure high sulfur loading interfacial covalent bonds lean electrolyte