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基于InVEST-PLUS模型的东江源流域碳储量时空演变与预测

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环境科学学报 2024年第3期44卷 419-430页

作者：吴则禹刘星根曾金凤江西理工大学土木与测绘工程学院赣州341000 赣江上游水文水资源监测中心赣州341000

土地利用方式对陆地生态系统碳储量有重要影响,探索土地利用变化与碳储量的关系,对于协调区域生态保护和产业发展具有重要意义.本文以南方丘陵江河源区—东江源流域为例,基于遥感解译的1991—2019年土地利用数据,采用InVEST模型研究土... 详细信息

土地利用方式对陆地生态系统碳储量有重要影响,探索土地利用变化与碳储量的关系,对于协调区域生态保护和产业发展具有重要意义.本文以南方丘陵江河源区—东江源流域为例,基于遥感解译的1991—2019年土地利用数据,采用InVEST模型研究土地利用变化及碳储量变化,同时采用PLUS模型预测不同发展情景下2028年东江源流域碳储量分布.结果表明:①东江源流域1991—2019年碳储量累计减少4.08×10^(6)t,碳存能力逐年减弱,但近几年趋于平稳.②土地利用变化是生态系统碳储量变化的主要影响因素,果园地侵占林地是导致碳存总量下降的主要原因.研究区碳储量空间分布特征与土地利用分布保持一致,碳固持减少的区域与果园地的扩张区域基本一致.③据预测,到2028年,自然发展情景下碳储量保持下降趋势,经济建设情景下碳储量呈加剧下降趋势,生态保护情景下碳储量实现增长.研究结果对科学评价东江源生态文明建设实践的成效具有重要意义,今后一段时期持续遵循生态保护政策有利于增强东江源流域碳汇功能.

关键词：碳储量 InVEST模型东江源流域 PLUS模型

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链式海底地震仪节点结构设计与试验

地震工程学报 2024年第3期46卷 672-679页

作者：张川周建平阮爱国翁利春段磊曾锦锋陈宁特上海交通大学海洋学院上海200030 自然资源部第二海洋研究所浙江杭州310012 自然资源部海洋智能观测技术创新中心浙江杭州310012 江苏深远海洋信息技术与装备创新中心江苏常州213001 杭州瀚陆海洋科技有限公司浙江杭州311200 上海交通大学船建学院上海200240

海底地震仪是一种重要的海洋地震观测设备。针对中国近岸浅海洋流噪声大和人类活动频繁的特点,提出链式地震观测方式并对链式海底地震仪节点进行机械结构设计。首先根据内部构件尺寸与布局对地震仪节点整体结构进行设计;然后通过理论计... 详细信息

海底地震仪是一种重要的海洋地震观测设备。针对中国近岸浅海洋流噪声大和人类活动频繁的特点,提出链式地震观测方式并对链式海底地震仪节点进行机械结构设计。首先根据内部构件尺寸与布局对地震仪节点整体结构进行设计;然后通过理论计算与有限元仿真方式确定地震仪节点仓体的壳体厚度、端盖厚度和密封尺寸;最后通过压力试验验证所设计的地震仪节点结构的耐压和水密性能符合要求,通过地震观测对比试验验证其接收天然地震的能力。此链式海底地震仪未来将应用于浙江近海的实际地震观测,提供实时连续的地震观测数据。

关键词：链式地震仪结构设计仿真计算压力试验地震试验

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采供血机构关键仪器设备采购论证评价模型:基于模糊评价法

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中国输血杂志 2024年第6期37卷 694-699页

作者：宁理黄力勤张耿曾劲峰深圳市血液中心广东深圳518035

目的建立采供血机构关键仪器设备采购论证的指标及模糊评价模型,为采供血机构的设备采购论证提供科学可靠的方法。方法通过文献回顾法和德尔菲专家咨询法,建立采供血机构关键仪器设备的采购论证评价指标。通过向专家发送指标调查问卷,... 详细信息

目的建立采供血机构关键仪器设备采购论证的指标及模糊评价模型,为采供血机构的设备采购论证提供科学可靠的方法。方法通过文献回顾法和德尔菲专家咨询法,建立采供血机构关键仪器设备的采购论证评价指标。通过向专家发送指标调查问卷,使用层次分析法计算各个指标的权重。根据设立的指标结合模糊综合评价方法,构建关键仪器设备的采购论证打分模型。应用建立的论证模型,对血液筛查流水线系统进行分析验证。结果共建立4项一级评定指标,16项二级评定指标。紧迫性、社会效益、经济效益和技术条件4个一级指标的权重分别为0.496,0.300,0.051和0.153。拟采购的血液筛查流水线系统进行采购前论证,评价值为0.629,通过采购论证。结论通过构建采供血机构关键仪器设备论证指标和模糊综合评价方法,可对采购论证进行可量化的科学评价。

关键词：采供血机构采购论证指标模糊综合评定

白细胞滤器中的NK及T细胞回收数量及其相关因素研究

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临床输血与检验 2024年第4期26卷 451-456页

作者：李然孙丽艳陈婷婷曾劲峰深圳市血液中心检验部深圳市血液中心输血医学研究所广东深圳518040

目的为了探索白细胞滤器中NK及T细胞回收数量及其相关因素,本项目将分析来源于白细胞滤器及全血的NK细胞及T细胞的数量,并进一步分析白细胞滤器来源的与全血来源的细胞数量是否与年龄、性别等因素相关。方法2023年7月—2024年6月于深圳... 详细信息

目的为了探索白细胞滤器中NK及T细胞回收数量及其相关因素,本项目将分析来源于白细胞滤器及全血的NK细胞及T细胞的数量,并进一步分析白细胞滤器来源的与全血来源的细胞数量是否与年龄、性别等因素相关。方法2023年7月—2024年6月于深圳市血液中心共收集51名重复献血者的全血样本及白细胞滤器(400 mL)。通过PBS缓冲液冲洗白细胞滤器得到白细胞,通过血细胞分析仪分别对来源全血及白细胞滤器来源的细胞进行计数,密度梯度离心法分离得到单个核细胞,流式细胞术分别检测两组来源的CD3-CD56+NK、CD3+CD4+T、CD3+CD8+T细胞的比例,GraphPad Prism 9.0软件进行统计分析。结果细胞计数结果显示,在一定量的冲洗液范围内,白细胞滤器来源的总淋巴细胞数量随着冲洗液体积的增多而增多,但细胞密度随着冲洗液的增多而降低。且白细胞滤器中的总淋巴细胞数量在不同年龄和不同性别的献血者中并未体现出明显的统计学差异(P>0.05)。细胞数量与细胞比例的结果通过计算可知,来源于白细胞滤器的CD3-CD56+NK细胞数量在不同年龄组间存在差异(P0.05)。而来源全血的男性CD3-CD56+NK细胞数量要明显高于女性(P>0.05)。无论是来源白细胞滤器还是全血的CD3+CD4+T细胞、CD3+CD8+T细胞数量在不同年龄组和性别组中都未见明显统计学差异(P>0.05)。结论在一定量的冲洗液范围内,来源白细胞滤器的总淋巴细胞数量与冲洗液的体积相关,CD3+CD4+T细胞、CD3+CD8+T细胞的数量与献血者年龄、性别无明显相关,而CD3-CD56+NK细胞数量与献血者年龄相关。

关键词：白细胞滤器 NK细胞 T细胞

Interactions between H_(2)O_(2)and dissolved organic matter during granular activated carbon-based residual H_(2)O_(2)quenching from the upstream UV/H_(2)O_(2)process

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Journal of Environmental Sciences 2023年第6期128卷 139-149页

作者： Yaoyao Kang Junfeng Lian Yichun Zhu Zuwen Liu Wentao Li Huiyu Dong Yuanyue Wang jinfeng zeng Zhimin Qiang Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China CECEP Environmental Protection Investment Development(Jiangxi)Co.Ltd. Nanchang 330006China Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed Ganzhou 341000China

Granular activated carbon(GAC)filtration can be employed to synchronously quench residual H_(2)O_(2)from the upstream UV/H_(2)O_(2)process and further degrade dissolved organicmatter(DOM).In this study,rapid small-scale column tests(RSSCTs)were performed to clarify the mechanisms underlying the interactions between H_(2)O_(2)and DOM during the GAC-based H_(2)O_(2)quenching *** was observed that GAC can catalytically decompose H_(2)O_(2),with a long-lasting high efficiency(>80%for approximately 50,000 empty-bed volumes).DOM inhibited GAC-based H_(2)O_(2)quenching via a pore-blocking effect,especially at high concentrations(10 mg/L),with the adsorbed DOM molecules being oxidized by the continuously generated·OH;this further deteriorated the H_(2)O_(2)quenching *** batch experiments,H_(2)O_(2)could enhance DOM adsorption by GAC;however,in RSSCTs,it deteriorated DOM *** observation could be attributed to the different·OH exposure in these two *** was also observed that aging with H_(2)O_(2)and DOM altered the morphology,specific surface area,pore volume,and the surface functional groups of GAC,owing to the oxidation effect of H_(2)O_(2)and·OH on the GAC surface as well as the effect of ***-tionally,the changes in the content of persistent free radicals in the GAC samples were insignificant following different aging *** work contributes to enhancing understanding regarding the UV/H_(2)O_(2)-GAC filtration scheme,and promoting the application in drinking water treatment.

关键词： Granular activated carbon H_(2)O_(2)quenching Dissolved organic matter Rapid small-scale column tests Persistent free radicals

Orderly defective superstructure for enhanced pseudocapacitive storage in titanium niobium oxide

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Nano Research 2022年第2期15卷 1570-1578页

作者： Le Yang jinfeng zeng Lei Zhou Ruiwen Shao Wellars Utetiwabo Muhammad Khurram Tufail Saisai Wang Wen Yang Jiatao Zhang Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Advanced Innovation Center for Intelligent Robots and Systems and Institute of convergence in medicine and engineering Beijing institute of technologyBeijing 100081China Key Laboratory of Active Components of Xinjiang Natural Medicine and Drug Release Technology School of PharmacyXinjiang Medical UniversityUrumqi 830011China

Artificial defect engineering in transition metal oxides is of important terms for numerous *** the present work,we proposed an in-situ gas reduction strategy to introduce ordered defects into titanium niobium oxide embedding on vapor grew carbon fibers(Ti_(2)Nb_(10)O_(29-x)@VGCFs).High-resolution transmission electron microscopy(HRTEM)and fast Fourier transform(FFT)simulation indicate that the ordered oxygen defects locate at interval layers,which leads to a new superstructure in Ti_(2)Nb_(10)O_(29).The ordered defects could provide extra active sites for lithium-ion storage and modulate ionic migration,resulting an enhanced pseudocapacitive *** addition,the excellent structural stability of the superstructure was proved by in-situ HRTEM under a harsh electrochemical *** work provides a directly observation of orderly defective superstructure in transition metal oxide,and its functionality on electrochemistry was revealed.

关键词： Ti_(2)Nb_(10)O_(29) in-situ gas reduction ordered defect lithium-ion hybrid capacitor pseudocapacitance

计划免疫后出生献血者乙肝无症状慢性感染血清学与分子生物学特征分析

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中国输血杂志 2024年第1期37卷 26-31页

作者：叶贤林李彤王若楠李然刘衡曾劲峰深圳市血液中心广东深圳518040

目的了解深圳地区计划免疫后出生献血者乙肝病毒无症状慢性感染情况,分析其血清学和分子生物学特征。方法将1992年之后出生的无偿献血者的HBsAg ELISA阳性血液标本进行乙肝两对半检测和核酸大容量提取,对其BCP/PC区及S区进行巢式PCR扩增... 详细信息

目的了解深圳地区计划免疫后出生献血者乙肝病毒无症状慢性感染情况,分析其血清学和分子生物学特征。方法将1992年之后出生的无偿献血者的HBsAg ELISA阳性血液标本进行乙肝两对半检测和核酸大容量提取,对其BCP/PC区及S区进行巢式PCR扩增及qPCR定量检测,并对产物进行基因测序及序列分析。结果2020年12月—2022年1月共收集46632份计划免疫后出生无偿献血者标本,其中含男性31612份,女性15020份。通过常规筛查得到ELISA阳性标本99份,经化学发光、巢式PCR、实时荧光PCR等方法检测,61份确证HBsAg阳性,阳性率0.13%(61/46632)。其中男性49份,阳性率0.16%,女性12份,阳性率0.08%(P<0.05)。50/61份标本获得S序列,经系统进化树分析,其中B型46份[92%(46/50),男性38份,女性8份],C型4份[8%(4/50),男性3份,女性1份]。S区突变频率高的分别N40S(8/46,17.39%),G44E(7/46,15.22%),Q129H/R(6/46,13.04%),Y161F/S(7/46,15.22%),V179A(4/46,8.70%),S53L(2/4,50%),C69T(2/4,50%),I126S/T(2/4,50%)。其中免疫逃逸突变有Q129R和T/I126A/N/S/T。结论乙肝疫苗接种能大大降低献血者的乙肝表面抗原阳性率,提高输血安全性。高频率的免疫逃逸突变也成为血液安全潜在风险,需要进一步探讨研究。

关键词：乙型肝炎病毒献血者乙肝疫苗免疫逃逸突变

A possible family of Ni-based high temperature superconductors

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Science Bulletin 2018年第15期63卷 957-963页

作者： Congcong Le jinfeng zeng Yuhao Gu Guang-Han Cao Jiangping Hu Kavli Institute of Theoretical Sciences University of Chinese Academy of Sciences Beijing 100190 China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications Institute of Theoretical and Computational Chemistry College of Chemistry and Molecular Engineering Peking University Beijing 100871 China Department of Physics Zhejiang University Hangzhou 310058 China Collahorative Innovation Center of Quantum Matter Beijing 100049 China

We suggest that a family of Ni-based compounds, which contain [Ni_2M_2O]~2à(M = chalcogen) layers with an antiperovskite structure constructed by mixed-anion Ni complexes, Ni M_4O_2, can be potential high temperature superconductors(high-Tc) upon doping or applying pressure. The layer structures have been formed in many other transitional metal compounds such as La_2B_2Se_2O_3(B = Mn, Fe, Co). For the Ni-based compounds, we predict that the parental compounds host collinear antiferromagnetic states similar to those in iron-based high temperature superconductors. The electronic physics near Fermi energy is controlled by two egd-orbitals with completely independent in-plane kinematics. We predict that the superconductivity in this family is characterized by strong competition between extended s-wave and d-wave pairing symmetries.

关键词： Iron-based superconductors Cuprates Nickel chalcogenides s(d)-wave pairing symmetry

Synthesis of Hollow Three-Dimensional Channels LiNi_(0.5)Mn_(1.5)O_4 Microsphere by PEO Soft Template Assisted with Solvothermal Method

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1153-1162页

作者： jinfeng zeng Zhiting Liu Hanbo Zou Wei Yang Haosen Fan Haijun Yu Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Brunp Recycling Technology Co. LtdGuangzhou 510006China Guangzhou Key Laboratory for New Energy and Green Catalysis Guangzhou UniversityGuangzhou 510006China

A appropriate size with three-dimension(3 D) channels for lithium diffusion plays an important role in constructing highperforming LiNi_(0.5)Mn_(1.5)O_4(LNMO) cathode materials, as it can not only reduce the transport path of lithium ions and electrons, but also reduce the side effects and withstand the structural strain in the process of repetitive Li~+ intercalation/deintercalation. In this work, an e fficient method for designing the hollow LNMO microsphere with 3 D channels structure by using polyethylene oxide(PEO) as soft template agent assisted solvothermal method is proposed. Experimental results indicate that PEO can make the reagents mingle evenly and nucleate slowly in the solvothermal process, thus obtaining a homogeneous distribution of carbonate precursors. In the final LNMO products, the hollow 3 D channels structure obtained by the decomposition of PEO and carbonate precursor in the calcination can provide abundant electroactive zones and electron/ion transport paths during the charge/discharge process, which benefits to improve the cycling performance and rate capability. The LNMO prepared by adding 1 g PEO possesses the most outstanding electrochemical performance, which presented an excellent discharge capacity of 143.1 mAh g~(-1) at 0.1 C and with a capacity retention of 92.2% after 100 cycles at 1 C. The superior performance attributed to the 3 D channels structure of hollow microspheres, which provide uninterrupted conductive systems and therefore achieve the stable transfer for electron/ion.

关键词： Polyethylene oxide(PEO) Soft template Solvothermal method Hollow LiNi_(0.5)Mn_(1.5)O_4(LNMO)microsphere Three-dimensional channels