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海南岛东海岸官塘地区地热水水化学特征及其循环演化过程识别

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地球科学 2024年第3期49卷 952-964页

作者：张彦鹏黎清华余绍文中国地质调查局武汉地质调查中心湖北武汉430205

地热水资源的形成与演化过程认识是区域地热资源科学合理开发利用的重要基础.运用水化学及同位素分析方法,结合区域地质构造特征,系统揭示了海南东海岸官塘地区地热水水化学特征、地热储温度以及补给来源,构建了官塘地区地热水循环演化... 详细信息

地热水资源的形成与演化过程认识是区域地热资源科学合理开发利用的重要基础.运用水化学及同位素分析方法,结合区域地质构造特征,系统揭示了海南东海岸官塘地区地热水水化学特征、地热储温度以及补给来源,构建了官塘地区地热水循环演化概念模型.研究结果表明:该区地热水水化学类型主要为HCO_(3)·SO_(4)-Na型,其组分主要来源于硅酸盐矿物溶解及深部CO_(2)等气体;地热水主要受到大气降水补给,补给海拔约为1122.2~1569.4 m,并且地热水上升过程中与浅部地下水之间存在较为显著的混合作用.在考虑混合和蒸汽损失的条件下,深部地热水与冷水混合前蒸汽损失的质量百分比约为18.2%~25.2%,地热水温度为190.4~217.8℃,冷水混合比例可达到66.8%~80.8%.该地区地热水开发程度逐年提高,导致地热水水位大幅下降,使得浅部冷水补给量增大,这可能是造成该地区开采地热水温度下降的关键影响因素.

关键词：官塘地热田地热水资源水文地球化学地热水补给来源热储温度水文地质

An equivalence canonical form of a matrix triplet over an arbitrary division ring with applications

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Science China Mathematics 2011年第5期54卷 907-924页

作者： WANG QingWen van der WOUDE J. W. yu shaowen Department of Mathematics Shanghai University Shanghai 200444 China Faculty of Electrical Engineering Mathematics and Computer ScienceDelft University of Technology Mekelweg 4 2628 CD Delft The Netherlands Department of Mathematics East China University of Science and Technology Shanghai 200237 China

We in this paper give a decomposition concerning the general matrix triplet over an arbitrary divisionring F with the same row or column numbers. We also design a practical algorithm for the decomposition of thematrix triplet. As applications, we present necessary and suficient conditions for the existence of the generalsolutions to the system of matrix equations DXA = C1, EXB = C2, F XC = C3 and the matrix equation AXD + BY E + CZF = Gover F. We give the expressions of the general solutions to the system and the matrix equation when thesolvability conditions are satisfied. Moreover, we present numerical examples to illustrate the results of thispaper. We also mention the other applications of the equivalence canonical form, for instance, for the compressionof color images.

关键词：矩阵方程应用程序规范形式等价除环三重分解彩色图像表达式

江西浒坑-分宜地区1 ∶5万水系沉积物地球化学特征研究

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东华理工大学学报（自然科学版） 2024年第3期47卷 246-257页

作者：符海明徐喆吴正昌余少文贺彬樊蓉江西省地质调查勘查院基础地质调查所江西南昌330030 江西省地质局第一地质大队江西南昌330030

江西浒坑分宜地区属于武功山矿集区的一部分,是华南重要的稀有金属成矿区。为实现新一轮找矿突破,根据1∶5万水系沉积物地球化学测量成果,对元素地球化学特征进行了分析,利用元素原始数据异常、衬值异常、比值异常等方法分别圈定异常并... 详细信息

江西浒坑分宜地区属于武功山矿集区的一部分,是华南重要的稀有金属成矿区。为实现新一轮找矿突破,根据1∶5万水系沉积物地球化学测量成果,对元素地球化学特征进行了分析,利用元素原始数据异常、衬值异常、比值异常等方法分别圈定异常并进行对比。结果表明,衬值异常法对稀有金属找矿具有良好的指示意义。稀有金属成矿元素Ta、Nb、Li、Rb、Cs、Be与W、Sn关系密切,局部存在W、Sn形成的异常更强、范围更大,而Ta、Nb等稀有金属元素异常偏弱的情况,可能存在“上钨锡、下稀有金属”的元素垂向分带现象,建议开展“就钨找稀有金属”工作。

关键词：水系沉积物测量地球化学化探异常稀有金属矿床江西

Efficient overall photosynthesis of H_(2)O_(2) by the BTz@Mn_(0.2)Cd_(0.8)S S-scheme heterojunction

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Science China Chemistry 2024年第6期67卷 1953-1960页

作者： Zhongyue Chen Sijie Wan Bei Cheng Wang Wang Yao Xiang Jiaguo yu shaowen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Hubei Technology Innovation Center for Advanced Composites Wuhan University of TechnologyWuhan430070China Hospital of Wuhan University of Technology Wuhan University of TechnologyWuhan430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan430074China

The photosynthesis of hydrogen peroxide(H_(2)O_(2))through the selective 2e^(-)oxygen reduction reaction(ORR)from O_(2)and H_(2)O stands out as an environmentally sustainable and cost-effective method for generating this essential chemical.Unfortunately,the widespread application of most photocatalysts is impeded by their reliance on sacrificial agents.In this context,we present a noteworthy advancement in the form of a step-scheme(S-scheme)heterojunction involving a donor-acceptor(D-A)-conjugated polymer and manganese cadmium sulfide(BTz@MCS).This innovative configuration enables efficient photocatalytic H_(2)O_(2)production within a non-sacrificial system,showcasing an impressive H_(2)O_(2)yield of 5,368μmol g^(-1)h^(-1)and an apparent quantum yield of 4.5%at 420 nm.Through insights gained from in-situ irradiated X-ray photoelectron spectroscopy(ISIXPS),in-situ diffuse reflectance infrared Fourier transformations spectroscopy(DRIFTS),and density function calculations(DFT),it is revealed that the sp^(2)C between thiazole-thiazole rings at the BTz and the concentrated holes at the MCS function as spatially separated redox centers.These centers catalyze the selective 2e^(-)ORR and 4e^(-)water oxidation reaction(WOR)concurrently.The O_(2)generated from the WOR is subsequently utilized by the ORR cycle,enabling the overall photosynthesis of H_(2)O_(2)with accelerated total reaction kinetics.Furthermore,the high photocatalytic performance of the developed catalyst is attributed to well-designed S-scheme heterojunctions with tuned band structures.The spatially separated redox centers and effective transfer of photogenerated charge carriers facilitated by the internal electric field significantly enhance reaction kinetics.This study introduces a promising avenue for photocatalytic H_(2)O_(2)production without sacrificial agents,providing valuable insights into the underlying mechanisms in S-scheme heterojunctions.

关键词： hydrogen peroxide non-sacrificial redox centers S-scheme heterojunction

A New Expression of the Hermitian Solutions to a System of Matrix Equations with Applications

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Algebra Colloquium 2016年第1期23卷 167-180页

作者： Guangjing Song shaowen yu Ming Chen School of Mathematics and Information Sciences Weifang University Weifang Shandong 261061 China Department of Mathematics East China University of Science and Technology Shanghai 200237 China College of Mathematics Physics and Information Engineering Jiaxing University Jiaxing Zhejiang 314000 China

In this paper, a new necessary and sufficient condition for the existence of a Hermitian solution as well as a new expression of the general Hermitian solution to the system of matrix equations A1X = C1 and A3XB3 = C3 are derived. The max-min ranks and inertias of these Hermitian solutions with some interesting applications are shown. In particular, the max-min ranks and inertias of the Hermitian part of the general solution to this system are presented.

关键词： matrix equations linear matrix expression generalized inverse inertias

Efficient overall photosynthesis of HOby the BTz@MnCdS S-scheme heterojunction

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Science China Chemistry 2024年

作者： Zhongyue Chen Sijie Wan Bei Cheng Wang Wang Yao Xiang Jiaguo yu shaowen Cao Hubei Technology Innovation Center for Advanced Composites Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hospital of Wuhan University of Technology Wuhan University of Technology Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences

The photosynthesis of hydrogen peroxide(H2O2) through the selective 2 e-oxygen reduction reaction(ORR) from O2and H2O stands out as an environmentally sustainable and cost-effective method for generating this essential chemical.Unfortunately,the widespread application of most photocatalysts is impeded by their reliance on sacrificial agents.In this context,we present a noteworthy advancement in the form of a step-scheme(S-scheme) heterojunction involving a donor-acceptor(D-A)-conjugated polymer and manganese cadmium sulfide(BTz@MCS).This innovative configuration enables efficient photocatalytic H2O2production within a non-sacrificial system,showcasing an impressive H2O2yield of 5,368 μmol g-1h-1and an apparent quantum yield of 4.5% at 420 nm.Through insights gained from in-situ irradiated X-ray photoelectron spectroscopy(ISIXPS),in-situ diffuse reflectance infrared Fourier transformations spectroscopy(DRIFTS),and density function calculations(DFT),it is revealed that the sp2C between thiazole-thiazole rings at the BTz and the concentrated holes at the MCS function as spatially separated redox centers.These centers catalyze the selective 2 e-ORR and 4 e-water oxidation reaction(WOR) concurrently.The O2generated from the WOR is subsequently utilized by the ORR cycle,enabling the overall photosynthesis of H2O2with accelerated total reaction kinetics.Furthermore,the high photocatalytic performance of the developed catalyst is attributed to well-designed S-scheme heterojunctions with tuned band structures.The spatially separated redox centers and effective transfer of photogenerated charge carriers facilitated by the internal electric field significantly enhance reaction kinetics.This study introduces a promising avenue for photocatalytic H2O2production without sacrificial agents,providing valuable insights into the underlying mechanisms in S-scheme heterojunctions.

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D-甘露醇颗粒形貌对其性质与功能的影响

中国医药工业杂志 2022年第3期53卷 360-366页

作者：余少文郭雅娟胡淑君陈英广东省药品检验所国家药品监督管理局药用辅料质量控制与评价重点实验室广东广州510700

D-甘露醇(1)的粒子形态可能会影响其理化特性及功能指标。本研究通过对1粒子的形态、晶型变化、粉体学性能、水分吸附性能进行考察,探讨1颗粒的形貌对其性质与功能的影响。结果表明,1的颗粒形貌能够在一定程度上影响其可压性、流动性等... 详细信息

D-甘露醇(1)的粒子形态可能会影响其理化特性及功能指标。本研究通过对1粒子的形态、晶型变化、粉体学性能、水分吸附性能进行考察,探讨1颗粒的形貌对其性质与功能的影响。结果表明,1的颗粒形貌能够在一定程度上影响其可压性、流动性等功能指标及水分吸附能力等性质。这提示在制剂开发前期的辅料筛选过程中,应关注不同晶型及制粒工艺对1性质及功能的影响,以保证1制剂质量的稳定性。

关键词： D-甘露醇颗粒形貌流动性可压性

Characteristics of laser-induced breakdown spectroscopy of liquid slag

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Plasma Science and Technology 2024年第2期26卷 86-93页

作者：董长言于洪霞孙兰香李洋刘修业周平黄少文 State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016People's Republic of China Key Laboratory of Networked Control Systems Chinese Academy of SciencesShenyang 110016People's RepublicofChina Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169People's Republic of China Shenyang University of Technology Shenyang 110870People's Republic of China Shenyang Ligong University Shenyang 1i0142People's Republic of China Shandong Iron and Steel Company Ltd. Jinan 271105People's Republic of China

Rapid online analysis of liquid slag is essential for optimizing the quality and energy efficiency of steel production. To investigate the key factors that affect the online measurement of refined slag using laser-induced breakdown spectroscopy(LIBS), this study examined the effects of slag composition and temperature on the intensity and stability of the LIBS spectra. The experimental temperature was controlled at three levels: 1350℃, 1400℃, and 1450℃. The results showed that slag composition and temperature significantly affected the intensity and stability of the LIBS spectra. Increasing the Fe content and temperature in the slag reduces its viscosity, resulting in an enhanced intensity and stability of the LIBS spectra. Additionally, 42 refined slag samples were quantitatively analyzed for Fe, Si, Ca, Mg, Al, and Mn at 1350℃, 1400℃, and 1450℃.The normalized full spectrum combined with partial least squares(PLS) quantification modeling was used, using the Ca Ⅱ 317.91 nm spectral line as an internal standard. The results show that using the internal standard normalization method can significantly reduce the influence of spectral fluctuations. Meanwhile, a temperature of 1450℃ has been found to yield superior results compared to both 1350℃ and 1400℃, and it is advantageous to conduct a quantitative analysis of the slag when it is in a “water-like” state with low viscosity.

关键词： laser-induced breakdown spectroscopy(LIBS) slag temperature composition viscosity internal standard normalization partial least squares(PLS)

长江中游地区地下水生态功能评价指标体系研究

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安全与环境工程 2023年第3期30卷 197-207页

作者：王旭明黎清华余绍文中国地质大学(武汉)环境学院湖北武汉430078 中国地质调查局武汉地质调查中心湖北武汉430205

长江中游地区地下水资源丰富,开发利用潜力巨大,同时生态环境极其脆弱。从生态需求角度着手,将依存性和关联性结合,选取土地利用类型、降水量、距地表水系缓冲距离、地下水-地表水相互作用、地下水水位埋深和包气带介质6项评价指标,构... 详细信息

长江中游地区地下水资源丰富,开发利用潜力巨大,同时生态环境极其脆弱。从生态需求角度着手,将依存性和关联性结合,选取土地利用类型、降水量、距地表水系缓冲距离、地下水-地表水相互作用、地下水水位埋深和包气带介质6项评价指标,构建了长江中游地区地下水生态功能评价指标体系,详尽阐述了各评价指标的等级划分机制,并利用层次分析法和GIS空间分析技术对长江中游地区地下水生态功能进行了评价。结果表明:长江中游地区地下水生态功能强区和较强区面积占研究区总面积的55.48%,地下水生态功能弱区和较弱区仅占研究区总面积的6.05%。由此可见,长江中游地区地下水生态功能较强,为确保生态环境的良性发展,应制定合理的发展规划,避免过度利用地下水资源。

关键词：地下水生态功能评价指标体系长江中游地区