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江西密坑山火山岩型铍矿的发现及其意义

岩石学报 2024年第1期40卷 29-42页

作者：李晓峰韦星林邓宣驰朱艺婷叶林春卢国安中国科学院地质与地球物理研究所中国科学院矿产资源研究重点实验室北京100029 中国科学院大学地球与行星科学学院北京100049 江西省地质局南昌330025 江西省地质局有色地质大队赣州341000 江西省地质局第七地质大队赣州341000

火山岩型铍矿是金属铍重要的矿床类型,它每年提供了全球80%以上的铍资源量,因此,寻找和发现该类型矿床对于提高我国铍资源的安全供给能力至关重要。本文作者经过前期野外地质调查、分析测试和野外地质剖面测量等工作,在江西密坑山陆相... 详细信息

火山岩型铍矿是金属铍重要的矿床类型,它每年提供了全球80%以上的铍资源量,因此,寻找和发现该类型矿床对于提高我国铍资源的安全供给能力至关重要。本文作者经过前期野外地质调查、分析测试和野外地质剖面测量等工作,在江西密坑山陆相火山盆地发现上湾、松岽和荣荆坝等三处火山岩型铍矿。按照赋矿围岩的不同,可以将它们分为碎斑熔岩中黄玉硫化物石英脉型和凝灰岩中破碎带蚀变岩型两种成矿类型。碎斑熔岩中黄玉硫化物石英脉型主要呈大脉、细脉和网脉状或团块状产出,矿石主要由黄玉、石英、白云母、黑云母、闪锌矿、方铅矿、锡石、黑钨矿、辉钼矿、硅铍石和羟硅铍石等矿物组成;已发现碎斑熔岩黄玉硫化物石英脉约20余条,Be含量一般在106×10^(-6)~850×10^(-6)之间。凝灰岩中破碎带蚀变岩型主要沿凝灰岩中的破碎带展布,矿石主要由石英、萤石、绿泥石、闪锌矿、方铅矿、锡石、绿柱石、硅铍石和羟硅铍石等矿物组成;已发现凝灰岩破碎带蚀变岩型矿化体4条,Be含量一般在40×10^(-6)~2790×10^(-6)之间,且随着蚀变强度的增强而升高。与铍矿化有关的热液蚀变主要为黄玉化、白云母化、萤石化、绿泥石化和碳酸盐化。本文获得碎斑熔岩锆石SHRIMP U-Pb年龄为136.4±1.8Ma;获得碎斑熔岩和凝灰岩铍矿化体中与铍矿物共生的锡石U-Pb年龄分别为137.4±1.9Ma和134.7±4.8Ma。碎斑熔岩和凝灰岩中铍矿化体形成时间基本相同,且接近于或稍晚于碎斑熔岩和晶屑凝灰岩的锆石U-Pb年龄,显示铍矿化与该地区的火山岩浆活动密切相关。该地区火山岩型铍矿的发现,不仅为在区域火山盆地中寻找该类型的矿床提供了依据,也为在发育斑岩型、次火山岩型锡矿地区寻找铍矿提供借鉴。

关键词：火山岩型铍矿成矿类型成矿时代密坑山华南

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滑雪场体验者与爱好者旅游行为对比研究

特区经济 2024年第4期423卷 150-154页

作者：王莹吴函哲朱怡婷新疆大学商学院新疆乌鲁木齐830091 新疆大学旅游学院新疆乌鲁木齐830046

本文运用方差分析法将新疆丝绸之路国际度假区滑雪场的旅游者区分为滑雪体验者和滑雪爱好者,同时在滑雪动机行为、偏好行为、态度行为以及活动轨迹等方面进行对比分析。研究结果表明:求知动机和休闲放松动机对体验者与爱好者存在一定的... 详细信息

本文运用方差分析法将新疆丝绸之路国际度假区滑雪场的旅游者区分为滑雪体验者和滑雪爱好者,同时在滑雪动机行为、偏好行为、态度行为以及活动轨迹等方面进行对比分析。研究结果表明:求知动机和休闲放松动机对体验者与爱好者存在一定的影响关系;与体验者相比,爱好者参与滑雪运动的意愿更为强烈;在旅游后的态度行为方面,体验者和爱好者两者之间无显著差异;滑雪活动轨迹方面,爱好者集中在高山上的滑雪雪道,而体验者聚集在山下的娱乐设施项目。

关键词：体验者爱好者滑雪运动旅游行为

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基于时空特征共享的多源交通数据修复

中山大学学报（自然科学版）（中英文） 2024年第5期63卷 167-176页

作者：王纪禹陈锐祥何兆成朱依婷武智刚许焕挺中山大学智能工程学院/广东省智能交通系统重点实验室广东深圳518107 鹏城实验室广东深圳518055

本文提出了一种基于多维度特征共享的多层稀疏张量分解模型(MFS-MSTD)。该模型在CP(CANDECOMP/PARAFAC)分解的基础上,对时空因子矩阵施加低秩正则化;并采用共享低秩因子矩阵的机制表达多源交通数据之间的互补性,在非随机缺失或路段级缺... 详细信息

本文提出了一种基于多维度特征共享的多层稀疏张量分解模型(MFS-MSTD)。该模型在CP(CANDECOMP/PARAFAC)分解的基础上,对时空因子矩阵施加低秩正则化;并采用共享低秩因子矩阵的机制表达多源交通数据之间的互补性,在非随机缺失或路段级缺失的场景下完成了因子矩阵的梯度更新。实例验证表明:在速度数据非随机缺失场景下,MFS-MSTD在RMSE、MAE和MAPE三个误差指标上相较于基线方法平均降低17%、21%和18%;在流量数据非随机缺失场景下,RMSE、MAE和MAPE平均降低52%、54%和33%。面对更复杂的路段级缺失场景,MFS-MSTD的修复性能优于TGMC-S和MTNTF两个基线模型,能很好地拟合出未观测路段的交通流量变化。

关键词：交通数据修复多源数据共享因子矩阵 CP分解

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浙江铜山源铜多金属矿床铍矿化的发现及其地质意义

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岩石学报 2024年第9期40卷 2611-2620页

作者：李晓峰朱艺婷韦星林邓宣驰吴海胡辉易先奎中国科学院地质与地球物理研究所中国科学院矿产资源研究重点实验室北京100029 中国科学院大学地球与行星科学学院北京100049 江西省地质局南昌330036 江西省地质局第五地质大队新余338000

浙江铜山源铜多金属矿床位于江山-绍兴与丽水-余姚深断裂之间,华夏褶皱系浙东南褶皱带丽水-宁波隆起带中。该矿床矿化带赋矿围岩为元古界八都群堑头组变粒岩,主要受北东向压-压扭性和北西向压扭-张扭性断裂构造控制,铜铅锌矿化类型主要... 详细信息

浙江铜山源铜多金属矿床位于江山-绍兴与丽水-余姚深断裂之间,华夏褶皱系浙东南褶皱带丽水-宁波隆起带中。该矿床矿化带赋矿围岩为元古界八都群堑头组变粒岩,主要受北东向压-压扭性和北西向压扭-张扭性断裂构造控制,铜铅锌矿化类型主要为破碎带蚀变岩型和石英脉型。在野外详细地质调查的基础上,本次研究在该矿床破碎带蚀变岩型矿化带中发现存在明显的铍富集矿化现象,Be含量在15.5×10^(-6)~147×10^(-6)之间。经电子探针和激光拉曼等分析测试,确定铍矿物主要为羟硅铍石,与铍矿化有关的热液蚀变主要为萤石化和碳酸盐化。根据铍矿化产出的地质条件和特点,本文把它划分为一种新的铍矿化类型——变质改造型,推测成矿流体中Be可能以(BeF_(4))^(2-)和[Be(CO_(3))_(2)]^(2-)络合物的形式进行迁移。当富Be成矿热液流体遇到钙铁榴石等含钙的矿物时,热液中的F或者(CO_(3))^(2-)与钙铁榴石中的钙优先结合形成萤石或者方解石,导致(BeF_(4))^(2-)和[Be(CO_(3))_(2)]^(2-)络合物分解,Be以羟硅铍石的形式沉淀下来。铜山源铜多金属矿床变质改造型铍矿化的发现,为区域上寻找同类型铍矿资源提供了良好的范例。另外,在寻找该类型铍矿同时,还应关注Cd、Co、In等关键金属的富集矿化现象。

关键词：变质改造型铍矿矿床类型高级变质岩 Cu-Pb-Zn矿床浙江铜山源

表面增强拉曼光谱在细菌耐药性评价方面的研究进展

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化学通报 2024年第5期87卷 550-558,549页

作者：黄梓萱李芷瑶朱怡亭张桐文有青王海霞天津中医药大学中药制药工程学院天津301617 天津市中药智能制药与绿色制药重点实验室天津301617

细菌耐药性问题引发全球关注。表面增强拉曼光谱技术(SERS)凭借灵敏度高、检测速度快等优势在评价细菌耐药性应用方面备受关注。本文首先总结了与细菌耐药性评价相关的SERS基底及检测方法,然后对SERS光谱技术在耐药菌和敏感菌鉴定、细... 详细信息

细菌耐药性问题引发全球关注。表面增强拉曼光谱技术(SERS)凭借灵敏度高、检测速度快等优势在评价细菌耐药性应用方面备受关注。本文首先总结了与细菌耐药性评价相关的SERS基底及检测方法,然后对SERS光谱技术在耐药菌和敏感菌鉴定、细菌生物膜成膜性分析与评价及抗菌药物敏感性筛查方面的应用进行总结,最后对SERS技术在细菌检测方面的一些瓶颈问题展开了讨论。希望本文能为SERS技术在细菌耐药性评价方面的应用提供方法指导和思路借鉴。

关键词：表面增强拉曼光谱耐药性评价纳米基底快速筛查

High-resolution Simulation of an Extreme Heavy Rainfall Event in Shanghai Using the Weather Research and Forecasting Model: Sensitivity to Planetary Boundary Layer Parameterization

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Advances in Atmospheric Sciences 2021年第1期38卷 98-115页

作者： Rui WANG yiting zhu Fengxue QIAO Xin-Zhong LIANG Han ZHANG Yang DING Key Laboratory of Geographic Information Science Ministry of EducationEast China Normal UniversityShanghai 200241China School of Geographic Sciences East China Normal UniversityShanghai 200241China Institute of Eco-Chongming Shanghai 200062China College of Atmospheric Science Nanjing University of Information Science and TechnologyNanjing 210044China Department of Atmospheric&Oceanic Science University of MarylandCollege ParkMaryland 20742USA Earth System Science Interdisciplinary Center University of MarylandCollege ParkMaryland 20742USA Shanghai Central Meteorological Observatory Shanghai 200030China

In this study,an extreme rainfall event that occurred on 25 May 2018 over Shanghai and its nearby area was simulated using the Weather Research and Forecasting model,with a focus on the effects of planetary boundary layer(PBL)physics using double nesting with large grid ratios(15:1 and 9:1).The sensitivity of the precipitation forecast was examined through three PBL schemes:the Yonsei University Scheme,the Mellor−Yamada−Nakanishi Niino Level 2.5(MYNN)scheme,and the Mellor−Yamada−Janjic *** PBL effects on boundary layer structures,convective thermodynamic and large-scale forcings were investigated to explain the model differences in extreme rainfall distributions and hourly *** results indicated that in single coarser grids(15 km and 9 km),the extreme rainfall amount was largely underestimated with all three PBL *** the inner 1-km grid,the underestimated intensity was improved;however,using the MYNN scheme for the 1-km grid domain with explicitly resolved convection and nested within the 9-km grid using the Kain−Fritsch cumulus scheme,significant advantages over the other PBL schemes are revealed in predicting the extreme rainfall distribution and the time of primary peak ***,with the weakest vertical mixing,produced the shallowest and most humid inversion layer with the lowest lifting condensation level,but stronger wind fields and upward motions from the top of the boundary layer to upper *** factors all facilitate the development of deep convection and moisture transport for intense precipitation,and result in its most realistic prediction of the primary rainfall peak.

关键词： PBL parameterization extreme rainfall high resolution

Bias Analysis in the Simulation of the Western North Pacific Tropical Cyclone Characteristics by Two High-Resolution Global Atmospheric Models

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Advances in Atmospheric Sciences 2023年第4期40卷 634-652页

作者： Qiyang LIU Fengxue QIAO Yongqiang YU yiting zhu Shuwen ZHAO Yujia LIU Fulin JIANG Xinyu HU Key Laboratory of Geographic Information Science Ministry of EducationEast China Normal UniversityShanghai 200241China School of Geographic Sciences East China Normal UniversityShanghai 200241China Climate Environment and Sustainability CenterSchool of Atmospheric ScienceNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Department of Atmospheric and Ocean Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081China

This study compares the atmosphere-only HighResMIP simulations from FGOALS-f3-H(FGOALS)and MRIAGCM3-2-S(MRI)with respect to tropical cyclone(TC)characteristics over the Western North Pacific(WNP)for the July-October months of *** focus is on investigating the role of the tropical easterly jet over the Western Pacific(WP_TEJ)in modulating the simulation biases in terms of their climatological distribution and interannual variability of WNP TC genesis frequency(TCGF)based on the analysis of the genesis potential index(GPI).Results show that the two models reasonably capture the main TC genesis location,the maximum center of frequency,and track density;however,their biases mainly lie in simulating the intense TCs and TCGF *** MRI better simulates the windpressure relationship(WPR)but overestimates the proportion of super typhoons(SSTYs).At the same time,FGOALS underestimates the WPR and the proportion of SSTYs but better simulates the total WNP TC *** particular,FGOALS overestimates the TCGF in the northeastern WNP,which is strongly tied to an overestimated WP_TEJ and the enhanced vertical circulation to the north of its entrance *** contrast,the MRI simulates a weaker WP_TEJ and vertical circulation,leading to a negative TCGF bias in most of the *** models exhibit comparable capability in simulating the interannual variability of WP_TEJ intensity,but the composite difference of large-scale atmospheric factors between strong and weak WP_TEJ years is overestimated,resulting in larger interannual anomalies of WNP TCGF,especially for ***,accurate simulations of the WP_TEJ and the associated oceanic and atmospheric factors are crucial to further improving WNP TC simulations for both models.

关键词： tropical cyclone genesis HighResMIP tropical easterly jet

Resource Mobility Aware Hybrid Task Planning in Space Information Networks

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Journal of Communications and Information Networks 2019年第4期4卷 107-116页

作者： Runzi Liu yiting zhu Yan Zhang Weihua Wu Di Zhou Kai Chi School of Information and Control Engineering Xi’an University of Architecture and TechnologyXi’anShaanxi 710055China The State Key Lab of ISN Xidian UniversityXi’anShaanxi 710071China Science and Technology on Communication Networks Laboratory CETC the 54th research instituteShijiazhuangHebei 050081China Electric Information Network Laboratory CETC the 20th research instituteXi’anShaanxi 710068China

In this paper,a resource mobility aware two-stage hybrid task planning algorithm is proposed to reduce the resource conflict between emergency tasks and the common tasks,so as to improve the overall performance of space information ***,in the common task planning stage,a resource fragment avoidance task planning algorithm is proposed,which reduces the contention between emergency tasks and the planned common tasks in the next stage by avoiding the generation of resource *** emergency tasks,we design a metric to quantify the revenue of the candidate resource combination of emergency tasks,which considers both the priority of the tasks and the impact on the planned common *** on this,a resource mobility aware emergency task planning algorithm is proposed,which strikes a good balance between improving the sum priority and avoiding disturbing the planned common ***,simulation results show that the proposed algorithm is superior to the existing algorithms in both the sum task priority and the task completion rate.

关键词： space information network task planning resource mobility

Utilization and Analysis of Resource Mobility in Space Information Networks

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Journal of Communications and Information Networks 2019年第1期4卷 67-77页

作者： yiting zhu Runzi Liu Min Sheng Liqin Yang Jiandong Li Weihua Wu Jianping Liu The State Key Laboratory of ISN Xidian UniversityXi’anShaanxi 710071China The State Key Lab of Astronautics Dynamics Xi’an Satellite Control CentreXi’anShaanxi 710043China

In space information networks,resource mobility is an important factor affecting the network performance,which not only results in challenges in resource management but also brings opportunities to the improvement of network service *** order to explore the restriction and improvement mechanism of resource mobility on network performance,we firstly use the time-expanded resource relationship graph to represent the moving behavior of multidimensional resources and the collaborative relationship between different *** by jointly considering the number of disjoint resource combinations,the length of moving time window,and the parameter of resource independence,we propose(k,n,L)degree of freedom on resource combination as a metric measuring performance gain resulted from resource ***,the analysis of resource mobility is transformed into the problem of finding disjoint paths in the graph,and the tradeoff relationship between QoS requirements of task and resource mobility utilization is ***,the tradeoff between the gain of resource mobility utilization and the payment of service process delay is revealed through simulation.

关键词： space information networks resource mo-bility degree of freedom on resource combination