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Conodont Evidence for the Age of the Panxian Fauna,Guizhou,China

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Acta Geologica Sinica(English Edition) 2006年第5期80卷 621-630页

作者： SUN Zuoyu SUN Yuanlin HAO weicheng jiang Dayong School of Earth and Space Sciences Peking University Beijing 100871

Detailed conodont analysis on the Yangjuan-Chupiwa section, Xinmin, Panxian County, Guizhou Province, revealed a conodont sequence including four Anisian conodont zones, viz. Nicoraella germanica Zone, Nc. kockeli Zone, Paragondolella bifurcata Zone and Neogondolella constricta Zone. These zones indicate that the upper Guanling Formation consists of strata from the Bithynian to the lllyrian of the Anisian. Appearance of Neogondolella constricta suggests that the Anisian/Ladinian boundary might be in the overlying Yangliujing Formation. The Panxian Fauna with well-preserved marine reptile and fish fossils is proved to belong to the lower part of the conodont Nc. kockeli Zone in the studied area. Thus, the age of the Panxian Fauna could be the early Pelsonian of the Anisian.

关键词： conodont Panxian Fauna Pelsonian Anisian Middle Triassic Panxian Guizhou

A newly Found Biotite Syenogranite in the Huangshaping Polymetallic Deposit, South China: Insights into Cu Mineralization

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Journal of Earth Science 2018年第3期29卷 537-555页

作者： weicheng jiang Huan Li Jinghua Wu Zhekai Zhou Hua Kong Jingya Cao Faculty of Earth Resources State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-Physics Central South University CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space Sciences University of Science and Technology of China

The W-Sn-Mo-Cu-Pb-Zn polymetallic mineralization in the Huangshaping Deposit is associated with different types of Jurassic granitic intrusions such as quartz porphyry, granophyre and granite porphyry. In this study, we carried out detailed mineralogical, petrological, geochemical, zircon U-Pb geochronological and Hf isotopic studies on a newly found, Cu-mineralization-related finegrained biotite syenogranite at Huangshaping. This syenogranite is mainly composed of quartz （40%）, K-feldspar （30%）, plagioclase （15%） and biotite （5%）, enriching in SiO2 （75.58 wt.%-76.02 wt.%）, K20 （5.24 wt.%-5.78 wt.%）, AI203 （12.23 wt.%-12.46 wt.%）, Rb （405 ppm-504 ppm）, U （18.5 ppm-40.7 ppm）, Th （47 ppm-52.3 ppm）, Nb （49.6 ppm-57.5 ppm）, and Cu （54 ppm-288 ppm） whereas depleting in P205 （0.01 wt.%）, TiO2 （0.05 wt.%-0.06 wt.%）, Ba （5 ppm-13.1 ppm）, Sr （6.8 ppm-23.9 ppm） and Eu （0.04 ppm-0.05 ppm）, with A1-type alkaline granite characteristics. Magmatic and hydrothermal zircons were separated from a Cu-mineralized syenogranite sample and yielded the ^206Pb/^238U concordant ages of 156.5±1.8 and 154.4±2.9 Ma, representing the intrusive age of the pluton and probable Cu-mineralization time at the Huangshaping Deposit, respectively. Zircon Hf isotopes suggest a crust-derived （partial melting of Paleoproterozoic basement） magma for the syenogranite, with some degree of crust-mantle interaction. We infer that the syenogranite is a transitional phase between the granophyre and the granite porphyry, not only contributed greatly to the Cu mineralization but also provided W-Sn polymetallic ore-forming metals for the Huangshaping Deposit.

关键词： zircon U-Pb dating Hf isotope A-type granite southern Hunan.

Cephalopods of the “Falang Formation” (Triassic) from Guanling and Zhenfeng Counties, Guizhou Province, China

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Acta Geologica Sinica(English Edition) 2003年第4期77卷 430-439页

作者： HAO weicheng, SUN Yuanlin, jiang Dayong, YANG Shouren and WANG Xinping Geological Museum, Peking University, Beijing 100871 Peking Univ Geol Museum Beijing 100871 Peoples R China

The 'Falang Formation' of western Guizhou was previously called the 'Halobia Bed' and considered to be I .adinian in age. It was subdivided upward into the Zhuganpo, Laishike and Longchang members based on ammonites and the Trachyceras multitubertulatum Zone of the Longchang Member was put in the Lower Carnian. Here in the present paper, 4 genera and 9 species of ammonites and 1 nautiloid genus and species collected from the upper part of the 'Falang Formation' (i.e. the Wayao Formation used in this paper, equivalent to the Laishike Member from Guanling and Zhenfeng counties are described. The geological and geographical distribution of these cephalopods, as well as the co-existing conodonts, put the Wayao Formation to the late early Carnmian.

关键词： ammonites nautiloids 'Falang Formation' Carnian Triassic Guizhou China

Flexible wearable sensors:An emerging platform for monitoring of bacterial infection in skin wounds

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Engineered Regeneration 2024年第2期5卷 186-198页

作者： Hao Meng weicheng Zhong Kui Ma Jianlong Su Liqian Ma Yaying Hao Yufeng jiang Xi Liu Xiaobing Fu Cuiping Zhang Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Department PLA General Hospital and PLA Medical CollegeBeijing 100048PR China PLA Key Laboratory of Tissue Repair and Regenerative Medicine Beijing 100048PR China Beijing Key Research Laboratory of Skin Injury Repair and RegenerationBeijing 100048PR China Research Unit of Trauma Care Tissue Repair and RegenerationChinese Academy of Medical Sciences2019RU051Beijing 100048PR China College of Graduate Tianjin Medical UniversityTianjin300070PR China Department of Tissue Regeneration and Wound Repair PLA General HospitalBeijingPR China

Persistent inflammatory responses often occur when bacteria and other microorganisms frequently invade and colonize open wounds and eventually result in the formation of chronic ***,achieving real-time detection of invasive bacteria accurately and promptly is essential for efficient wound management and accelerat-ing the healing ***,flexible wearable sensors have garnered significant attention,especially those designed for monitoring real-time biophysical or biochemical signals in wound sites in a minimally invasive *** provide more precise and continuous monitoring data,making them as emerging tools for clinical *** this review,we first discuss the species and community distribution of different types of bacteria in chronic ***,we introduce currently developed techniques for detecting bacteria at wound ***-lowing that,we discuss the recent progress and unresolved issues of various flexible wearable sensors in detecting bacteria at wound *** believe that this review can provide meaningful guidance for the development of flexible wearable sensors for bacteria detection.

关键词： Flexible wearable sensors Chronic wounds Bacterial infections Real-time detection

A simple method for predicting of mass burning rates in compartment fires

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火灾科学 1998年第1期 61-69页

作者： Yang Lizhong Fan weicheng jiang Fenghui(State Key Lab of Fire Science,USTC,230026)

ＡｓｉｍｐｌｅｍｅｔｈｏｄｆｏｒｐｒｅｄｉｃｔｉｎｇｏｆｍａｓｂｕｒｎｉｎｇｒａｔｅｓｉｎｃｏｍｐａｒｔｍｅｎｔｆｉｒｅｓＹａｎｇＬｉｚｈｏｎｇＦａｎＷｅｉｃｈｅｎｇＪｉａｎｇＦｅｎｇｈｕｉ（ＳｔａｔｅＫｅｙＬａｂｏ... 详细信息

ＡｓｉｍｐｌｅｍｅｔｈｏｄｆｏｒｐｒｅｄｉｃｔｉｎｇｏｆｍａｓｂｕｒｎｉｎｇｒａｔｅｓｉｎｃｏｍｐａｒｔｍｅｎｔｆｉｒｅｓＹａｎｇＬｉｚｈｏｎｇＦａｎＷｅｉｃｈｅｎｇＪｉａｎｇＦｅｎｇｈｕｉ（ＳｔａｔｅＫｅｙＬａｂｏｆＦｉｒｅＳｃｉｅｎｃｅ，ＵＳＴＣ...

关键词： compartment fire ventilation parameter fuel surface area

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循环流化床锅炉内衬的复合烘炉工艺

耐火材料 2001年第1期35卷 26-28页

作者：江伟程张洪宁波开发区北仑热电有限公司宁波315800

根据循环流化床锅炉耐火材料内衬的脱水机理 ,提出了循环流化床锅炉内衬的一种复合烘炉法。使用结果表明 :该方法可大大提高烘炉质量。

关键词：循环流化床锅炉耐火材料内衬复合烘炉工艺

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锡同位素研究进展及其在矿床学中的应用展望

地质学报 2021年第12期95卷 3926-3936页

作者：李欢吴经华蒋维诚任涛刘飚中南大学地球科学与信息物理学院有色金属成矿预测与地质环境监测教育部重点实验室湖南长沙410083 Department of Earth and Environmental Sciences Macquarie UniversitySydney 2109Australia

锡同位素是一种新兴的非传统稳定同位素,其在考古学及天体化学中的运用显示出非常大的示踪潜力和价值,然而目前其在地质学(尤其是矿床学)中的研究和应用前景缺乏系统介绍。本文总结分析了世界上目前所发表的主要天然及人工样品的锡同位... 详细信息

锡同位素是一种新兴的非传统稳定同位素,其在考古学及天体化学中的运用显示出非常大的示踪潜力和价值,然而目前其在地质学(尤其是矿床学)中的研究和应用前景缺乏系统介绍。本文总结分析了世界上目前所发表的主要天然及人工样品的锡同位素数据,发现天然样品中锡同位素组成有较大差异,其中玻璃陨石最富重锡(其δ^(122/118)Sn值可达2.53‰),而黝锡矿(黄锡矿)最富轻锡(其δ^(120/116)Sn值可达-1.71‰)。其中,含锡矿物(如锡石和黝锡矿)中的锡同位素组成变化范围要远远大于全岩样品。地幔及地壳来源的不同岩性或地质体的全岩锡同位素组成有明显差别;锡同位素在一定条件下可以发生分馏,且分馏程度可能远远大于锡同位素的初始值差异。锡石锡同位素对成矿环境非常敏感,其形成时的流体成分、化学反应速率以及物化条件(如温度、盐度、氧逸度、pH值等)等因素均能影响其锡同位素的组成。深部流体(如岩浆来源)结晶的锡石富重锡,而浅部流体(如地层流体)的加入将使锡石富轻锡,因此锡石的锡同位素具有判别不同矿床成因类型的潜力。展望未来,锡同位素的研究有望在以下三方面取得突破:①各地球圈层锡同位素储库数据的精确测定;②矿物原位微区锡同位素的准确快速分析;③热液矿床锡同位素分馏机制的建立。聚焦岩浆-热液演化过程中含锡矿物的锡同位素组成变化,有望揭示含锡流体性质及物化环境,从成矿流体来源、演化、沉淀等角度探讨成矿过程中锡同位素分馏的控制因素及其示踪机制,建立复杂锡成矿系统中的锡同位素演化模型。系统的锡同位素研究可为深入认识多类型锡矿化的"源"、"运""储"过程提供新的思路,为判别有争议锡矿床的成因类型及成矿物质来源提供关键的锡同位素证据,进而为研究大规模锡多金属成矿作用提供全新的视角,具有重要的理论价值及现实意义。

关键词：锡同位素分馏机制锡石岩浆-热液过程锡矿床成因

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纵-弯复合振动超声挤压加工试验研究

材料科学与工艺 2017年第5期25卷 62-67页

作者：郑建新刘威成蒋书祥河南理工大学机械与动力工程学院河南焦作454003

为研究挤压加工时静压力、进给量和挤压速度等工艺参数对试件表面质量的影响,在挤压加工中引入纵-弯复合振动后对Q235钢轴件端面进行处理,并与普通挤压加工进行对比,基于正交试验结果构建了挤压加工后表面粗糙度和表面里氏硬度二次回归... 详细信息

为研究挤压加工时静压力、进给量和挤压速度等工艺参数对试件表面质量的影响,在挤压加工中引入纵-弯复合振动后对Q235钢轴件端面进行处理,并与普通挤压加工进行对比,基于正交试验结果构建了挤压加工后表面粗糙度和表面里氏硬度二次回归预测模型.试验发现:在相同加工工艺参数下,在普通挤压加工中引入纵-弯复合超声振动后获得的表面粗糙度Ra值更小,而表面里氏硬度值显著提高;采用两种挤压加工方法后工件表面粗糙度Ra值均随着静压力和进给量的增加而增大,而挤压速度的影响很小,进给量对表面粗糙度的影响最为显著;工件经超声挤压加工时静压力越大,则获得的表面硬度越大,且表面硬度随进给量的增大先增大后减小,而普通挤压加工后表面硬度随静压力和进给量的增大先增后减,且在两种加工方式下工件表面硬度基本不受挤压速度的影响.纵-弯复合振动超声挤压加工工艺适合Q235钢表面强化处理,构建的表面粗糙度和硬度的预测模型可用于指导Q235钢表面强化处理工艺生产.

关键词：超声挤压纵-弯复合振动表面粗糙度硬度预测模型

基于3S技术的黔中马尾松蓄积量估测模型研究

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林业调查规划 2015年第4期40卷 13-18页

作者：蒋维成贵州林业勘察设计有限公司贵州贵阳550003

以landsat-8OLI为遥感数据源,结合立地因子、林分因子,运用逐步回归方法建立黔中马尾松蓄积量预估模型,并对模型进行拟合优度检验、F检验、t检验、残差正态性、方差齐次性检验及精度验证。研究结果表明:基于3S技术建立的黔中马尾松蓄积... 详细信息

以landsat-8OLI为遥感数据源,结合立地因子、林分因子,运用逐步回归方法建立黔中马尾松蓄积量预估模型,并对模型进行拟合优度检验、F检验、t检验、残差正态性、方差齐次性检验及精度验证。研究结果表明:基于3S技术建立的黔中马尾松蓄积量估测模型在数学上是可行的;利用30个实测样地对模型进行适度性检验和精度验证,其平均精度达83.22%。并就模型的关联性以及马尾松郁闭度估测模型等问题进行了讨论。

关键词： 3S技术蓄积量估测模型模型检验精度验证马尾松