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Contrasting sources and enrichment mechanisms in lithium-rich salt lakes:A Li-h-O isotopic and geochemical study from northern Tibetan Plateau

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Geoscience Frontiers 2024年第2期15卷 315-333页

作者： Fei Xue hongbing Tan Xiying Zhang MSantosh Peixin Cong Lu Ge chao Li Guohui Chen Yu Zhang School of Earth Sciences and Engineering Hohai UniversityNanjing 210098PR China Key Laboratory of Comprehensive and highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Geology and Environment of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesQinghai 810008PR China School of Earth Sciences and Resources China University of Geosciences BeijingBeijing 100083PR China Department of Earth Sciences University of AdelaideSA 5005Australia Yonsei Frontier Lab Yonsei UniversitySeoul 0372Korea

Lithium(Li),a crucial mineral resource for modern high-tech industries,is notably abundant in the northern Tibetan Plateau,primarily within lithium-rich salt ***,the exploration and development of these resources are hindered due to an incomplete understanding of their nature and *** we present results from a comprehensive study on the hydrochemical parameters,whole-rock geochemistry,h-O isotopes,and Li concentrations in surface brine,river water,geothermal springs,and associated rocks from two representative lithium-enriched salt lakes,the Laguo Co(LGC)and Cangmu Co(CMC)in Tibet to understand the genetic *** water-salt balance calculations and h-O isotopic analysis reveal that Li in LGC and CMC primarily originates from the Suomei Zangbo(SMZB,~91%)and Donglong Zangbo(DLZB,~75%)rivers,*** is estimated that the LGC and CMC took a minimum of 6.0 ka and 3.0 ka to accumulate their current lithium resources,*** distinct geological characteristics reflect evolutionary differences between the two lakes,suggesting diverse lithium sources and enrichment *** high lithium ion concentration and light lithium isotope composition in the SMZB river waters indicate the genetic relationship with lithium-enriched geothermal springs in the Tibetan *** results suggest that lithium in the LGC originates from lithium-enriched geothermal springs and is primarily supplied through the small-scale SMZB *** contrast,the formation and evolution of CMC are influenced by the northern Lunggar rifts,receiving a prolonged and stable input from the DLZB,resulting in high lithium concentrations and isotopic *** absence of lithium-enriched geothermal springs and the prevalence of silicate rocks in the CMC catchment suggest that lithium may be sourced from the weathering of silicate rocks,such as granitic pegmatite veins containing lithium-rich beryl,widely distributed in the upstream area of *** forward modeling a

关键词： Lithium isotopes hydrochemistry Salt lakes Enrichment mechanism Tibetan Plateau

从“差序格局”到“天下格局”:中国优秀企业家精神的演化过程

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经济管理 2024年第2期46卷 5-29页

作者：晁罡钱晨王磊华南理工大学工商管理学院广东广州510641 清华大学经济管理学院北京100084 华南师范大学政治与公共管理学院广东广州510006

改革开放以来,中国取得了举世瞩目的经济和社会发展成就,中国优秀企业家在此过程中发挥了重要作用,并展现出突出的创新创业精神和深厚的家国天下情怀。培育和弘扬颇具中国特色的企业家精神,不仅是推动企业和经济高质量发展的关键,也是... 详细信息

改革开放以来,中国取得了举世瞩目的经济和社会发展成就,中国优秀企业家在此过程中发挥了重要作用,并展现出突出的创新创业精神和深厚的家国天下情怀。培育和弘扬颇具中国特色的企业家精神,不仅是推动企业和经济高质量发展的关键,也是实现中国式现代化的重要环节。然而,对于中国优秀企业家精神及其背后的文化根源,相关研究尚缺乏充分的理论探讨。通过对11位代表性企业家及其企业长达10年的跟踪调查,本文运用经典扎根理论方法,研究发现这些企业家在对待自我、员工、合作伙伴以及社会大众和自然万物时呈现出沿着“修身立德”“成就员工”“多方共生”和“天下为公”路径的格局演化,并创造性提出“天下格局”这一中国式企业家精神新概念。本文通过理论构建对“天下格局”做出概念界定,并从内在结构、价值取向和适用群体等方面深入讨论了“天下格局”与“差序格局”的差异与联系,认为从前者到后者是个体精神不断演进和超越的过程。本研究对于推进中国式企业家精神研究、突破差序式管理模式局限和深化共益企业视角下的社会责任研究,具有理论价值;对于突破家族企业的信任困局和发展瓶颈,引导企业在更广泛的社会领域自觉地履行社会责任,实现企业与社会的共同富裕和共同进步,亦具有现实价值。

关键词：天下格局差序格局中国式企业家精神企业社会责任扎根理论方法

氯化过程次生有机氯胺的稳定性及其与酚类化合物的反应活性

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环境科学学报 2024年第7期44卷 213-221页

作者：赵茜英浩刘航刘超山东建筑大学市政与环境工程学院济南250100 中国科学院生态环境研究中心中国科学院饮用水科学与技术重点实验室北京100085 中国科学院大学北京100049

氯消毒过程中,氯会与水中的溶解性有机氮反应生成有机氯胺.本文研究了以脂肪胺、氨基酸和酰胺为前体物次生有机氯胺的稳定性及其与酚类化合物的反应活性.结果表明,以乙胺、甘氨酸、尿素为前体物生成的有机氯胺在接近中性p h条件下可稳... 详细信息

氯消毒过程中,氯会与水中的溶解性有机氮反应生成有机氯胺.本文研究了以脂肪胺、氨基酸和酰胺为前体物次生有机氯胺的稳定性及其与酚类化合物的反应活性.结果表明,以乙胺、甘氨酸、尿素为前体物生成的有机氯胺在接近中性p h条件下可稳定存在.有机氯胺与间苯二酚、邻苯二酚的反应活性高于苯酚.在20℃、p h 8的反应条件下,对于间苯二酚,反应活性遵循:N-氯代乙胺(二级反应速率常数k=1.82×10^(-1)L·mol^(-1)·s^(-1))>N-氯代甘氨酸(k=7.05×10^(-2)L·mol^(-1)·s^(-1))>无机一氯胺(k=5.25×10^(-2)L·mol^(-1)·s^(-1))>N-氯代尿素(k=4.21×10^(-3)L·mol^(-1)·s^(-1));对于邻苯二酚,反应活性遵循:N-氯代尿素(k=1.28×10^(-1)L·mol^(-1)·s^(-1))>无机一氯胺(k=6.10×10^(-2)L·mol^(-1)·s^(-1))>N-氯代乙胺(k=3.96×10^(-2)L·mol^(-1)·s^(-1))>N-氯代甘氨酸(k=2.88×10^(-3)L·mol^(-1)·s^(-1)).随p h值升高(p h 6~10),N-氯代乙胺与间苯二酚、N-氯代尿素与邻苯二酚的k增大.尽管有机氯胺通常被认为是“伪氯胺”,但以胺类、尿素为前体物的有机氯胺与酚类化合物的反应活性高于无机一氯胺,因此,氯化水处理过程中次生有机氯胺可与水中基质反应,影响水质安全,需予以关注.

关键词：有机氯胺脂肪胺氨基酸酰胺氯消毒

On the mechanism and control for the ultra-low frequency oscillation in NY Power Grid with large-scale hydropower

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Control Theory and Technology 2019年第3期17卷 241-251页

作者： Ancheng XUE Jiawei WANG chao ZhENG Joe h.ChOW Tianshu BI State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source (North China Electric Power University) Changping District Beijing 102206 China China Electric Power Research Institute Haidian District Beijing 100192 China Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy 12180 New York State U.S.A.

The power grid with large proportion of hydropower may engage the ultra-low frequency oscillation (ULFO),which threatening the operation of *** the NY Power Grid system,whose dimension is over thousands,this paper reveals the cause of ULFO with the phase portrait method,i.e.,lies in the saturation of the different limits of the governor system of the generators,in other words,the occurrence of limit cycle is due to the non-smooth *** furthermore,it proposes two methods to suppress ULFO with the philosophy of destroying the condition of non-smooth *** detail,first,the phenomenon of ULFO in NY Power Grid,the damping characteristics and the limits in the governor system of the hydropower units are ***,based on the non-smooth bifurcation theory,the mathematical basis of the oscillation in the non-smooth system caused by the saturation of limits is *** then,the non-oscillation and oscillation dynamic of the system corresponding to without/with limits in the governor system are ***,it discusses the influence of the saturation of single limit on the characteristics of ULFO with the phase ***,the phase portraits of the ULFO under different faults is analyzed,and it shows that the limiting saturation occurs with a large enough ***,the ULFO is resulting from the negative damping of generation and the saturation of multiple limits under a large enough *** addition,according to the above mechanism,two strategies to suppress the ULFO,i.e.,the governor parameters tuning and the fault strength relief are *** simulation shows the effectiveness of proposed strategies.

关键词： Ultra -low frequency oscillatio n gover nor system limit no rnsmooth bifurcation limit cycle

环状RNA hsa_circUCK2参与调控二氧化硅致肺纤维化进程

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环境与职业医学 2024年第4期41卷 362-366,374页

作者：张聪罗薇王莎巢杰东南大学公共卫生学院环境医学工程教育部重点实验室江苏南京210009 东南大学医学院医学生理系江苏南京210009

[背景]肺纤维化疾病目前早期缺少筛查诊断方法,后期缺乏特效治疗措施,因此急需探究其机制并开发针对性的治疗方法。[目的]筛选病理条件下差异表达的环状RNA(circRNA)hsa_circUCK2的表达情况,探究其对肺纤维化的影响。[方法]在细胞实验中... 详细信息

[背景]肺纤维化疾病目前早期缺少筛查诊断方法,后期缺乏特效治疗措施,因此急需探究其机制并开发针对性的治疗方法。[目的]筛选病理条件下差异表达的环状RNA(circRNA)hsa_circUCK2的表达情况,探究其对肺纤维化的影响。[方法]在细胞实验中,使用小干扰RNA(siRNA)敲除hPF-a细胞中hsa_circUCK2,TGF-β1刺激hPF-a细胞,设立si-NC组、si-circUCK2组、si-NC+TGF-β1处理组、si-circUCK2+TGF-β1处理组4组,Western blot法检测4组hPF-a细胞中纤连蛋白(FN1)表达情况,划痕实验检测hPF-a细胞迁移能力,CCK-8实验检测TGF-β1刺激的2组(si-NC+TGF-β1处理组和si-circUCK2+TGF-β1处理组)hPF-a细胞活性。在动物实验中,健康SPF级雄性C57BL/6小鼠48只,随机分为生理盐水+si-con组,生理盐水+si-circ_0000115组,SiO_(2)+si-con组,SiO2+si-circ_0000115组4组。mmu_circ_0000115是hsa_circUCK2的小鼠同源基因,气管滴注siRNA敲除小鼠肺circRNA mmu_circ_0000115,48 h后通过气管滴注SiO2悬液(0.2 g·kg^(-1),50 mg·mL^(-1))构建小鼠肺纤维化模型,实时荧光定量PCR检测小鼠各脏器中敲除效率,Western blot检测肺组织中I型胶原α2蛋白(COL1A2)表达情况,天狼星红检测肺组织中胶原合成情况。[结果]在细胞实验中,Western blot结果显示,敲除hsa_circUCK2可下调TGF-β1刺激的hPFa细胞中FN1的表达水平(P hsa_circUCK2基因的下调可以抑制hPF-a细胞的增殖和迁移(P hsa_circUCK2抑制成纤维细胞活化和减少肺纤维化模型小鼠中胶原沉积。提示hsa_circUCK2参与肺纤维化进程,可能是肺纤维化的潜在治疗靶点。

关键词：环状RNA 转录组芯片 hsa_circUCK2 肺纤维化人肺成纤维-成人细胞

Advanced deep learning methods for molecular property prediction

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Quantitative Biology 2023年第4期11卷 395-404页

作者： chao Pang henry h.Y.Tong Leyi Wei School of Software Shandong UniversityJinanChina Joint SDU-NTU Centre forArtificial Intelligence Research(C-FAIR) Shandong UniversityJinanChina Centre for Artificial Intelligence Driven Drug Discovery FacultyofApplied ScienceMacao Polytechnic UniversityMacaoChina

The prediction of molecular properties is a crucial task in the field of drug *** methods that can accurately predict molecular properties can significantly accelerate the drug discovery process and reduce the cost of drug *** recent years,iterative updates in computing hardware and the rise of deep learning have created a new and effective path for molecular property *** learning methods can leverage the vast amount of data accumulated over the years in drug discovery and do not require complex feature *** this review,we summarize molecular representations and commonly used datasets in molecular property prediction models and present advanced deep learning methods for molecular property prediction,including state-of-the-art deep learning networks such as graph neural networks and Transformer-based models,as well as state-of-the-art deep learning strategies such as 3D pre-train,contrastive learning,multi-task learning,transfer learning,and *** also point out some critical issues such as lack of datasets,low information utilization,and lack of specificity for diseases.

关键词： dataset deep learning molecular property prediction molecular representations

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层状富锂锰基正极材料包覆改性的最新进展

工程科学学报 2024年第3期46卷 420-437页

作者：张建李海瑶梁晨黄惠高超昆明理工大学冶金与能源工程学院昆明650093 云南省冶金电极材料工程技术研究中心昆明650106 昆明理工大学材料科学与工程学院昆明650093

首先综述了富锂锰基材料的结构和循环过程中存在的问题,然后介绍了富锂锰基正极材料包覆改性研究的最新进展,系统描述了电化学活性材料、非电化学活性材料和导电聚合物等不同种类包覆物质及单层包覆、双层复合包覆和原位包覆等包覆方法... 详细信息

首先综述了富锂锰基材料的结构和循环过程中存在的问题,然后介绍了富锂锰基正极材料包覆改性研究的最新进展,系统描述了电化学活性材料、非电化学活性材料和导电聚合物等不同种类包覆物质及单层包覆、双层复合包覆和原位包覆等包覆方法在该材料改性领域中的应用,进一步从材料结构、失效机制等角度深入分析了各种包覆改性方法及包覆物质改善富锂锰基材料循环性能的作用机制.最后,对Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2) (LMNC)材料及改性方法等未来发展方向进行了展望.

关键词：富锂锰基正极材料包覆改性原位包覆电化学性能改性机理

A common polar dye additive as corrosion inhibitor and leveling agent for stable aqueous zinc-ion batteries

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Electron 2024年第1期2卷 39-47页

作者： hao Wang chao hu Zefang Yang Tingqing Wu Yihu Li Qi Zhang Yougen Tang haiyan Wang hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina Department of Physics Chalmers University of TechnologyGothenburgSweden

The industrial application of zinc-ion batteries is restricted by irrepressible dendrite growth and side reactions that resulted from the surface heterogeneity of the commercial zinc electrode and the thermodynamic spontaneous corrosion in a weakly acidic aqueous ***,a common polar dye,Procion Red MX-5b,with high polarity and asymmetric charge distribution is introduced into the zinc sulfate electrolyte,which can not only reconstruct the solvation configuration of Zn2þand strengthen hydrogen bonding to reduce the reactivity of free h_(2)O but also homogenize interfacial electric field by its preferentially absorption on the zinc *** symmetric cell can cycle with a lower voltage hysteresis(78.4 mV)for 1120 times at 5 mA cm^(−2)and Zn//NaV_(3)O_(8)·1.5h_(2)O full cell can be cycled over 1000 times with high capacity(average 170 mAh g^(−1))at 4 A g^(−1)in the compound *** study provides a new perspective for additive engineering strategies of aqueous zinc-ion batteries.

关键词： corrosion inhibitor leveling agent multifunctional additive solvation structure zinc-ion batteries

Mantle contributions to granitoids associated with Sn mineralization:Geochemical and isotopic evidence from the giant Dachang deposit,South China

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Geoscience Frontiers 2024年第1期15卷 187-208页

作者： Tingyi Wang Qihai Shu Xiaoping Xia chao Li Yanning Wang Jiahao Chen Xiang Sun M.Santosh Qingfei Wang State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Frontiers Science Center for Deep-time Digital Earth China University of Geosciences(Beijing)Beijing 100083China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China National Research Center for Geoanalysis Chinese Academy of Geological SciencesBeijing 100037China Department of Earth Science University of AdelaideAdelaideSouth Australia 5005Australia State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China

Major Sn deposits are commonly linked to crust-derived and highly evolved granites,with magma generation aided by mantle ***,whether and how the mantle components contribute to Sn polymetallic mineralization remains *** this study,in combination with a compilation of equivalent data in the region,we provide new constraints on this issue based on detailed investigations on the petrogenesis and metallogenic significance of granitoids including the causative batholith and later granodiorite porphyry dike in the giant Dachang Sn deposit from South *** former has zircon U-Pb ages of 93-91 Ma and belongs to highly evolved S-type biotite granite,which experienced fractionation of massive *** latter shows zircon U-Pb ages of 90 Ma and displays I-type granite *** batholith was mainly derived from the dehydration melting of biotite in the metasedimentary sources,as revealed by the relatively low whole-rock Pb contents(high Ba/Pb ratios(2.71-17.1)and initial T(ti-zr)of 790℃.Compared with the adjacent crust-derived S-type granites(-24.8--5.1)and I-type granites(-11.0 to-5.2),the Dachang S-type biotite granites present higher zirconεhf(t)values(-9.1 to-2.1).Furthermore,the low magmatic zirconδ18O values(6.2‰)and higher apatite LREE(3277-4114 ppm)and Sr(1137-1357 ppm)contents than of arc-type basic rocks were *** characteristics jointly hint the contributions of mantle *** higher initial T(ti-zr)(>850℃),whole-rock Mg#(52 to 58),apatiteεNd(t)(-9.2 to-6.5)and zirconεhf(t)(-7.6 to 2.5)values but lower zirconδ18O values(6.33 to 8.30‰)of the later granodiorite porphyry dike than those of the batholith also suggest that mantle material was involved in the generation of the dikes,which is evident by the variational features of zircon and apatite trace *** addition,at the zircon hf0.05,the higher zirconΔFMQ values(mostly from-1.8 to 2.0)and h2O contents(100-1100 ppm)of the Dachang

关键词： highly evolved S-type biotite granite I-type granodiorite porphyry dike Crust-mantle mixing Mantle contributions Dachang Sn mineralization