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基于神经网络的高寒地区CF_(4)和SF_(6)/CF_(4)检测

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中国电力 2024年第3期57卷 103-112页

作者：马汝括董杰王雅湉伊国鑫丁祥浩马乐国网青海省电力公司青海西宁810008 国网青海省电力公司超高压公司青海西宁810000

高寒地区须携带多台仪器以满足3种不同量级SF_(6)气体中CF_(4)气体浓度的检测需求,现场运维效率低且仪器购置成本高。为此,首先设计了一种基于热释电检测技术的SF_(6)气体中CF_(4)气体浓度检测仪器,可自动选择不同的放大电阻以实现多量... 详细信息

高寒地区须携带多台仪器以满足3种不同量级SF_(6)气体中CF_(4)气体浓度的检测需求,现场运维效率低且仪器购置成本高。为此,首先设计了一种基于热释电检测技术的SF_(6)气体中CF_(4)气体浓度检测仪器,可自动选择不同的放大电阻以实现多量程切换。然后提出了BP和PSO-BP2种神经网络温度-压力协同补偿模型,并通过搭建高效模拟实验平台为模型预测提供数据支撑,预测结果表明,PSO-BP神经网络优于BP神经网络。最后将PSO-BP神经网络温度-压力协同补偿模型内置于多量程检测仪器CF_(4)气体浓度检测仪器。模拟实验结果表明,该检测仪器在不同温度和压力下,小量程和大量程检测误差和重复性分别不超过±2%和1.6%,混合比量程下误差和重复性分别不超过±0.5%和0.2%,对高寒地区电网运维检修具有重要作用。

关键词： CF_(4)气体浓度检测热释电检测技术高寒地区三量程 PSO-BP神经网络模型温度-压力协同补偿

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围填海工程对三门湾纳潮量和水交换的影响

海洋地质前沿 2024年第5期40卷 40-50页

作者：韩慧慧高飞丁咚马乐中国海洋大学海洋地球科学学院青岛266100 中国地质调查局青岛海洋地质研究所青岛266237

以浙江省三门湾为研究区域,基于MIKE21水动力模型模拟了三门湾及附近海域2000、2009和2019年的水动力特征,分析探讨围填海工程对三门湾纳潮量及水交换能力的影响,计算结果表明:2000、2009和2019年的最大纳潮量分别为5.06×10^(9)、4.95... 详细信息

以浙江省三门湾为研究区域,基于MIKE21水动力模型模拟了三门湾及附近海域2000、2009和2019年的水动力特征,分析探讨围填海工程对三门湾纳潮量及水交换能力的影响,计算结果表明:2000、2009和2019年的最大纳潮量分别为5.06×10^(9)、4.95×10^(9)和4.85×10^(9)m^(3),最小纳潮量分别为1.92×10^(9)、1.90×10^(9)和1.80×10^(9)m^(3),平均纳潮量分别为3.55×10^(9)、3.39×10^(9)和3.21×10^(9)m^(3)。围填海工程致使2000—2009、2009—2019年平均纳潮量分别减小了4.51%和5.31%;通过保守物质浓度扩散来定量分析三门湾的水交换能力,得到2000年半交换周期介于21~27 d,2009年半交换周期介于23~29 d,2019年半交换周期介于23~30 d。湾内保守物质浓度减少90%的时间周期分别为2000年58 d,2009年延长了7 d达到65 d,2019年继续延长至69 d。三门湾的围填海工程削弱了湾内的水动力条件和水交换能力,可进一步影响泥沙输运和水质环境。

关键词：数值模拟水动力三门湾纳潮量水交换能力

Oxygen functionalization-assisted anionic exchange toward unique construction of flower-like transition metal chalcogenide embedded carbon fabric for ultra-long life flexible energy storage and conversion

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Carbon Energy 2024年第1期6卷 72-93页

作者： Roshan M.Bhattarai Kisan Chhetri Nghia le Debendra Acharya Shirjana Saud ma. Cao Hoang Phuong Lan Nguyen Sang Jae Kim Young Sun Mok Department of Chemical Engineering Jeju National UniversityJejuRepublic of Korea Department of Nano Convergence Engineering Jeonbuk National UniversityJeonjuRepublic of Korea Regional leading Research Center(RLRC)for Nanocarbon-based Energy ma.erials and Application Technology Jeonbuk National UniversityJeonjuRepublic of Korea Department of Chemistry Mississippi State UniversityStarkvilleMississippiUSA Nanoma.erials and System Laboratory Department of Mechatronics EngineeringJeju National UniversityJejuRepublic of Korea

The metal-organic framework(MOF)derived Ni–Co–C–N composite alloys(NiCCZ)were“embedded”inside the carbon cloth(CC)strands as opposed to the popular idea of growing them upward to realize ultrastable energy storage and conversion *** NiCCZ was then oxygen functionalized,facilitating the next step of stoichiometric sulfur anion diffusion during hydrotherma. sulfurization,generating a flower-like metal hydroxysulfide structure(NiCCZOS)with strong partial implantation inside *** obtained NiCCZOS shows an excellent capacity when tested as a supercapacitor electrode in a three-electrode ***,when paired with the bioma.s-derived nitrogen-rich activated carbon,the asymmetric supercapacitor device shows almost 100%capacity retention even after 45,000 charge–discharge cycles with rema.kable energy density(59.4 Wh kg^(-1)/263.8μWh cm^(–2))owing to a uniquely designed ***,the same electrode performed as an excellent bifunctional water-splitting electrocatalyst with an overpotential of 271 mV for oxygen evolution reaction(OER)and 168.4 mV for hydrogen evolution reaction(HER)at 10 ma.cm−2 current density along with 30 h of unhinged chronopotentiometric stability performa.ce for both HER and ***,a unique metal chalcogenide composite electrode/substrate configuration has been proposed as a highly stable electrode ma.erial for flexible energy storage and conversion applications.

关键词： carbon cloth energy conversion energy storage flexible metal embedding ultra-stable

Association of a complete breast cancer pathologic response with axillary lymph node metastasis via neoadjuvant chemotherapy:Results from the CSBrS-012 study

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Chinese Medical Journal 2024年第11期137卷 1369-1371页

作者： le ma.Pin gao Zhenzhen Liu Dechuang Jiao Rui Ling Jingjing Xiao Yi Zhao Yitong Wang Hongjian Yang Yunjiang Liu Ke Liu Jianguo Zhang guangyan Li Dahua ma. Yinglei Deng Jianjun He ma.ma.tiaili Amina Zhigang Yu Wang Fei Yinhua Liu Peifen Fu Minya Yao Jiandong Wang Li Zhu Hongchuan Jiang Zuowei Zhao Xingsong Tian Zhongwei Cao Xinyu ma.Kejin Wu Shaomei Fu Ailin Song Yanwei Wang Jin Feng Zhimin Fan Department of Breast Surgery General Surgery CenterThe First Hospital of Jilin UniversityChangchunJilin 130021China Department of Breast Disease Henan Breast Cancer CenterAffiliated Cancer Hospital of Zhengzhou University&Henan Cancer HospitalZhengzhouHenan 450008China Department of Thyroid Breast and Vascular SurgeryXijing HospitalFourth Military Medical UniversityXi’anShaanxi 710032China Surgical Oncology Department Shengjing Hospital of China Medical UniversityShenyangLiaoning 110022China Department of Breast Surgery The Cancer Hospital of the University of Chinese Academy of Sciences(Zhejiang Cancer Hospital)Institute of Basic Medicine and Cancer(IBMC)Chinese Academy of SciencesHangzhouZhejiang 310022China Department of Surgery The Fourth Hospital of Hebei Medical UniversityShijiazhuangHebei 052360China Fourth Department of Breast Surgery Jilin Cancer HospitalChangchunJilin 130012China Department of Breast Surgery The Second Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiang 150086China Department of Breast Surgery Affiliated Wudang Hospital of Guizhou Medical UniversityGuiyangGuizhou 550009China Department of Breast Surgery The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710061China Department of Breast Surgery The Second HospitalCheeloo College of MedicineShandong UniversityJinanShandong 250033China Breast Disease Center Peking University First HospitalBeijing 100034China Department of Breast Surgery The First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhouZhejiang 310003China Department of general Surgery The First Medical CenterChinese PLA General HospitalBeijing 100852China Department of Breast Surgery Beijing Chaoyang HospitalCapital Medical UniversityBeijing 100020China Department of Breast Surgery The Second Affiliated Hospital of Dalian Medical UniversityDalianLiaoning 116023China Department of Breast and Thyroid Surgery Shandong Provincial Hospital Affiliated to Shandong UniversityJinan

To the Editor:In the last decade,neoadjuvant chemotherapy(NAC)has become a well-accepted treatment option for breast cancer,although few detailed description of NAC in China has yet been reported.[1]A previous study found that among patients with clinically node-negative(cN0)breast cancer,97.7%(432/442)with breast pathologic complete response(bpCR)had ypN0(absence of metastases in the axillary lymph nodes);and 71.6%(882/1232)without bpCR achieved ypN0(Pma. epiderma. growth factor receptor 2(HER2)positive or triple-negative breast cancer(TNBC)that achieved bpCR.

关键词： breast pathologic chemotherapy

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透明装甲防护材料及其结构设计与应用评价

硅酸盐学报 2024年第3期52卷 1043-1064页

作者：邵岑张乐王思晴王彤邱凡马庆飞陈浩江苏师范大学物理与电子工程学院江苏省先进激光材料与器件重点实验室江苏徐州221116 江苏锡沂高新材料产业技术研究院江苏徐州221400

透明装甲是应对未来战争的“光学盾牌”,其具有高光学透明度、高硬度、高强度、可防弹道冲击与爆炸物碎片冲击等特性,被广泛应用于装甲战车、武装直升机、舰船航母等装备平台。目前,世界各军事强国竞相开发出抗弹性能优异的透明装甲,但... 详细信息

透明装甲是应对未来战争的“光学盾牌”,其具有高光学透明度、高硬度、高强度、可防弹道冲击与爆炸物碎片冲击等特性,被广泛应用于装甲战车、武装直升机、舰船航母等装备平台。目前,世界各军事强国竞相开发出抗弹性能优异的透明装甲,但是,透明装甲的防护性能提升与轻量化设计仍面临瓶颈。本文首先对现役透明防护材料的性质进行了详细介绍;重点分析了透明防护装甲的结构设计方案及其损伤机制,并指出了防护性能提升的重点方向;再者介绍了国内外透明防护材料性能考核的评价方法,特别是需要重点考核的项目;最后,对透明装甲的发展方向进行了展望,为新一代透明装甲的结构设计与应用评价提供借鉴。

关键词：透明装甲防护性能轻量化结构设计应用评价

Honeycomb-like MoCo alloy on 3D nitrogen-doped porous graphene for efficient hydrogen evolution reaction

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Rare Metals 2024年第3期43卷 1072-1082页

作者： Lin-Ping Wang kua.g Li Hua-Long Ding le Xu Chen Huang Jiao-Jiao Zhou Cong-TaoWen Pei-Lin Zhang Wei-Wei Wang Lu-Yang Chen Key Laboratory for Ultrafine ma.erials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China State Key Laboratory of High-Performa.ce Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai200050China State Key Laboratory of Chemical Engineering and School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai200237China

An efficient electrocatalyst is indispensable to significantly reduce energy consumption and accelerate the conversion efficiency of water *** this work,the honeycomb-like porous MoCo alloy on nitrogen-doped three-dimensional(3D)porous graphene substrate(Mo_(0.3)Co_(0.7)@NPg)has been synthesized from the annealing of layered double hydroxide(MoCo-LDH@NPg).Especially,the Mo_(0.3)Co_(0.7)@NPg exhibits low hydrogen evolution overpotential of 75 mV(10 ma.cm^(-2))and a Tafel slope of 69.9 mV·dec^(-1),which can be attributed to highly conductive NPg substrate,the unique nanostructure and the synergistic effect of Mo and ***,the Mo_(0.3)Co_(0.7)@NPg can ma.ntain the original morphology and high catalytic activity after 50-h stability *** work proposes a general strategy to synthesize a multi-element alloy on conductive substrates with high porosity for electrocatalytic reaction.

关键词： MoCo alloy Three-dimensional nitrogen-doped porous graphene Hydrogen evolution reaction(HER)

Haplotype-resolved and chromosome-scale genomes provide insights into co-adaptation between the Amur tiger and Amur leopard

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Zoological Research 2024年第3期45卷 464-467页

作者： Hai-Meng Li Bo-Yang Liu Min-Hui Shi le Zhang Shang-Chen Yang Sunil Kuma. Sahu Liang-Yu Cui Shan-Lin Liu Nicolas Dussex Yue ma.Dan Liu Wei-Yao Kong Hao-Rong Lu Yue Zhao Love Dalén Huan Liu Tian-Ming Lan guang-Shun Jiang Yan-Chun Xu College of Wildlife and Protected Area Northeast Forestry UniversityHarbinHeilongjiang 150040China State Key Laboratory of Agricultural genomics BGI ResearchShenzhenGuangdong 518083China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China College of Life Sciences Zhejiang UniversityHangzhouZhejiang 310058China BgI Research WuhanHubei 430074China Department of Entomology College of Plant ProtectionChina Agricultural UniversityBeijing 100193China Centre for Palaeogenetics Svante Arrhenius väg 20CStockholm 10691Sweden Department of Zoology Stockholm UniversityStockholm 10691Sweden Department of Bioinforma.ics and genetics Swedish Museum of Natural HistoryStockholm 10691Sweden Heilongjiang Siberian Tiger Park HarbinHeilongjiang 150000China Jinlin Provincial Academy of Forestry Science ChangchunJilin 130033China China National geneBank BGI ResearchShenzhenGuangdong 518120China guangdong Provincial Key Laboratory of genome Read and Write BGI ResearchShenzhenGuangdong 518083China BgI Life Science Joint Research Center Northeast Forestry UniversityHarbinHeilongjiang 150040China Feline Research Center of National Forestry and grassland Administration College of Wildlife and Protected AreaNortheast Forestry UniversityHarbinHeilongjiang 150040China National Forestry and grassland Administration Research Center of Engineering Technology for Wildlife Conservation and Utilization HarbinHeilongjiang 150040China

DEAR EDITOR,Big cats,such as Amur tigers(Panthera tigris altaica)and Amur leopards(*** orientalis),are apex predator and have evolved specialized traits for hunting and carnivory(Moya et al.,2022),thus playing a crucial role in ma.ntaining biodiversity and ecosystem integrity by regulating prey-predator ***,huma.-induced pressures,habitat fragmentation,and environmental alterations have restricted these species in sma.l and isolated ***,all extant big cats are categorized as endangered or threatened according to their conservation *** tigers and Amur leopards share overlapping geographic ranges,habitats,and certain prey species in the forests of Northeast Asia(Jiang et al.,2015).To reduce interspecies conflict,these carnivores exhibit differentiated dietary and temporal *** tigers predominantly prey on large ungulates,while Amur leopards hunt sma.l to medium-sized anima.s(Sugimoto et al.,2016).Additionally,they occupy different temporal niches,with tigers being active at night and leopards more active during the *** spatial and temporal niche partitioning,interspecific competition between these two species is ***,benefiting from their greater size,have a competitive advantage over leopards,which can ma.ifest in occasional leopard predation by tigers and declines in leopard populations with increasing tiger density(Jiang et al.,2015).Tigers also displace leopards from ma.ginal habitats in nature reserves where they coexist.

关键词： habitat Panthera resolved

Controllable optical bistability in a Fabry-Pérot cavity with a nonlinear three-dimensional Dirac semimetal

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Chinese Physics B 2024年第3期33卷 441-446页

作者：袁红霞李佳雪马奇军田海山叶云洋罗文昕吴杏华蒋乐勇 School of Physics and Electronics Hunan Normal UniversityChangsha 410081China School of Intelligent ma.ufacturing and Electronic Engineering Wenzhou University of TechnologyWenzhou 325035China Key Laboratory for Microstructural Functional ma.erials of Jiangxi Province College of ScienceJiujiang UniversityJiujiang 332005China

Optical bistability(OB)is capable of rapidly and reversibly transforming a parameter of an optical signal from one state to another,and homologous nonlinear optical bistable devices are core components of high-speed all-optical communication and all-optical *** this paper,we theoretically investigated the controllable OB from a Fabry-Pérot(FP)cavity with a nonlinear three-dimensional Dirac semimetal(3D DSM)in the terahertz *** OB stems from the third-order nonlinear bulk conductivity of the 3D DSM and the resonance mode has a positive effect on the generation of *** FP cavity structure is able to tune the OB because the transmittance and the reflectance can be modulated by the Fermi energy of the 3D *** believe that this FP cavity configuration could provide a reference concept for realizing tunable bistable devices.

关键词： optical bistability Dirac semimetal Fabry-Pérot cavity

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镐齿滚刀的齿形及布齿参数优化试验研究

隧道建设（中英文） 2024年第S01期44卷 448-455页

作者：康乐殷丽君马亚楠龚秋明马洪素北京工业大学城市防灾与减灾教育部重点实验室北京100124 核工业北京地质研究院北京100029 国家原子能机构高放废物地质处置创新中心北京100029

为研究镶齿滚刀上镐齿的齿形参数以及齿间距、排间距对其破岩效率及齿下岩石损伤区的影响规律,选用不同齿形的镐齿对尺寸为300 mm×300 mm×300 mm北山花岗岩进行侵入破岩试验,对镐齿侵入试验过程、侵入力、破岩体积、破岩效率、齿下岩... 详细信息

为研究镶齿滚刀上镐齿的齿形参数以及齿间距、排间距对其破岩效率及齿下岩石损伤区的影响规律,选用不同齿形的镐齿对尺寸为300 mm×300 mm×300 mm北山花岗岩进行侵入破岩试验,对镐齿侵入试验过程、侵入力、破岩体积、破岩效率、齿下岩石损伤区特征进行分析。试验结果表明:1)所选试验齿形中直径为18 mm镐齿破岩效率最高;2)齿间距和排间距为35~40 mm时,镐齿侵入破岩效率最高;3)应用荧光裂纹显现法分析齿下岩石裂纹分布特征,获得了不同齿形参数下岩石损伤区范围及裂纹扩展模式、裂纹特征分析结果,与通过侵入力、破岩比能分析得出的破岩效率结论一致。

关键词：镐齿侵入破岩试验齿形及布齿参数破岩效率损伤区特征