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A three-way electrolyte with ternary solvents for high-energy-density and long-cycling lithium-sulfur pouch cells

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SusMat 2024年第2期4卷 1-12页

作者： zheng Li Legeng Yu Chen-Xi Bi Xi-Yao Li JinMa Xiang Chen xue-Qiang z.ang Aibing Chen Haoting Chen zuoru z.ang Li-zhen Fan Bo-Quan Li Cheng Tang Qiang z.ang Tsinghua Center for Green Chemical Engineering Electrification Beijing Key Laboratory of Green Chemical Reaction Engineering and TechnologyDepartment of Chemical EngineeringTsinghua UniversityBeijingChina School of Materials Science and Engineering Beijing Institute of TechnologyBeijingChina Institute of Advanced Materials and Technology University of Science and TechnologyBeijingChina Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuanChina Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan UniversityJangan-GuSuwon-SiGyeonggi-DoRepublic of Korea College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuangChina Ordos Carbon Neutral Research and Application Co. Ltd.Kangbashi DistrictOrdos CityInner MongoliaChina Institute for Carbon Neutrality Tsinghua UniversityBeijingChina

Lithium–sulfur(Li–S)batteries promise high-energy-density potential to exceed the commercialized lithiumion batteries but suffer from limited cycling lifespan due to the side reactions between lithium polysulfides(LiPSs)and Li metal ***,a three-way electrolyte with ternary solvents is proposed to enable high-energy-density and long-cycling Li–S pouch ***,ternary solvents composed of 1,2-dimethoxyethane,di-isopropyl sulfide,and 1,3,5-trioxane are employed to guarantee smooth cathode kinetics,inhibit the parasitic reactions,and construct a robust solid electrolyte interphase,*** cycling lifespan of Li–S coin cells with 50μm Li anodes and 4.0 mg cm^(−2) sulfur cathodes is prolonged from88 to 222 cycles using the three-way ***-heterogeneous solvation structure of LiPSs and organic-rich solid electrolyte interphase are identified to improve the cycling stability of Li metal ***,a 3.0 Ah-level Li–S pouch cell with the three-way electrolyte realizes a high energy density of 405 Wh kg^(−1) and undergoes 27 *** affords a three-way electrolyte recipe for suppressing the side reactions of LiPSs and inspires rational electrolyte design for practical high-energy-density and long-cycling Li–S batteries.

关键词： lithium metal anodes lithium-sulfur batteries pouch cells solid electrolyte interphase three-way electrolyte

Correlation study of biological characteristics of non-small cell lung cancer A549 cells after transfecting plasmid by microbubble ultrasound contrast agent

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Asian Pacific Journal of Tropical Medicine 2016年第6期9卷 564-567页

作者： Xuan-Yan Guo Man-Lu xue-Qing Chen Fan-Ding He ang-Li Ultrasonic Department Academy of Sciences of Sichuan Province People's Hospital of Sichuan Province Pancreatic Surgery West China Hospital Sichuan University

Objective: To explore the role of the abnormal expression of miRNAs in the development process of non-small cell lung cancer and the feasibility of ultrasound microbubble-mediated gene therapy after transfecting antisense miRNA-224 and miRNA-122 a plasmids into nonsmall cell lung cancer A549 cells. Methods: Antisense miRNA-224 and miRNA-122 a plasmids were transfected into non-small cell lung cancer A549 cells on the optimal ultrasound microbubble mediated condition. We set up a control group. The cell proliferation activity, apoptosis, invasion ability were detected by MTT assay, Annexin V-PE, Transwell invasion experiment and colony formation assay, respectively. Results: The expression of mi RNA-224 decreased and the expression of miRNA-122 a rose after the plasmids of target genes were transfected into non-small cell lung cancer A549 cells, and there were significant differences when compared with those of the control group(P<0.05). After the plasmids of target genes were transfected into A549 cells, the growth of antisense miRNA-224 and miRNA-122 a were inhibited, and the differences were significant as compared with the control group(P < 0.05). Besides, the inhibition of miRNA-122 a group was the most significant and there was statistically significant difference as compared with miRNA-224 group(t =-4.694, P = 0.009). After the plasmids of target genes were transfected into A549 cells, the proportion of apoptotic cells increased, the invasive cells were decreased and the clone ability reduced, and also there was a significant difference as compared with those of the control group(P < 0.05). What's more, the apoptotic peak appeared in miRNA-122 a group. Its invasion ability decreased most obviously(40.25 ± 3.97/visual field), the number of clone ability was 104.93 ± 4.87 and the inhibitory effect was the most obviously. There was statistically significant difference as compared with other groups(P < 0.05). Conclusions: A549 cells transfected by ultrasound micro

关键词： Microbubble ultrasound contrast agent MiR-224 MiR-122a Non-small cell lung cancer

模拟淋溶条件下亚热带不同性状凋落叶DOM的溶出量特征

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亚热带资源与环境学报 2024年第2期19卷 113-120页

作者：张雪王宏宇吴捷录郑旭灵吴福忠福建师范大学地理科学学院、碳中和未来技术学院福州350117 福建师范大学湿润亚热带生态-地理过程教育部重点实验室福州350117

亚热带区域丰沛的降雨可导致森林凋落叶可溶性有机质(Dissolved Organic Matter,DOM)大量淋溶溶出,成为地表和土壤活性有机质的重要来源,但凋落叶性状可能显著影响DOM溶出特征。本研究选取具有明显性状差异的8种亚热带森林典型树种凋落... 详细信息

亚热带区域丰沛的降雨可导致森林凋落叶可溶性有机质(Dissolved Organic Matter,DOM)大量淋溶溶出,成为地表和土壤活性有机质的重要来源,但凋落叶性状可能显著影响DOM溶出特征。本研究选取具有明显性状差异的8种亚热带森林典型树种凋落叶为研究对象,采用模拟淋溶实验方法,分析淋溶后凋落叶可溶性有机质(包括碳、氮和磷元素)的溶出量与化学计量特征及其与性状的关系。结果发现,相较于其他树种,淋溶前DOM含量较高、持水能力较高的杜英凋落叶淋溶后碳、氮、磷的溶出量以及质量损失均大于其他树种。不同性状凋落叶可溶性有机碳、氮、磷的溶出率也表现出显著差异,且磷的溶出率明显高于碳和氮的溶出率。相关性分析表明,凋落叶可溶性有机碳溶出率主要受淋溶前可溶性有机碳和氮含量以及最大持水力的影响,但凋落叶的叶面积和淋溶前可溶性有机磷含量是影响可溶性有机磷溶出率的最重要因子。此外,凋落叶性状也可显著影响溶出DOM的DOC/DOP,DON/DOP和DOC/DON,改变从凋落物进入土壤的DOM质量。这些结果充分表明亚热带森林凋落叶DOM的迁移过程与凋落叶持水能力密切相关,为区域生态系统结构优化和可持续经营管理提供了科学依据。

关键词：可溶性有机质叶片初始性状淋溶持水能力亚热带森林

ISOTHERMAL PRECISION FORGING PROCESS OF ALUMINUM ALLOY CYLINDRICAL HOUSING

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中国有色金属学会会刊：英文版 1997年第3期7卷 124-127页

作者： Wang, z xue, KM Shan, DB Xu, FC Lu, Y HARBIN INST TECHNOL SCH MAT SCI & ENGNHARBIN 150001PEOPLES R CHINA

ＩＳＯＴＨＥＲＭＡＬＰＲＥＣＩＳＩＯＮＦＯＲＧＩＮＧＰＲＯＣＥＳＳＯＦＡＬＵＭＩＮＵＭＡＬＬＯＹＣＹＬＩＮＤＲＩＣＡＬＨＯＵＳＩＮＧ①ＷａｎｇＺｈｅｎ，ＸｕｅＫｅｍｉｎ，ＳｈａｎＤｅｂｉｎ，ＸｕＦｕｃｈａｎｇ，ＬｕＹ... 详细信息

ＩＳＯＴＨＥＲＭＡＬＰＲＥＣＩＳＩＯＮＦＯＲＧＩＮＧＰＲＯＣＥＳＳＯＦＡＬＵＭＩＮＵＭＡＬＬＯＹＣＹＬＩＮＤＲＩＣＡＬＨＯＵＳＩＮＧ①ＷａｎｇＺｈｅｎ，ＸｕｅＫｅｍｉｎ，ＳｈａｎＤｅｂｉｎ，ＸｕＦｕｃｈａｎｇ，ＬｕＹａｎＳｃｈｏｏｌｏｆＭａｔｅｒｉａ...

关键词： aluminum alloy isothermal precision forging assembled die heating range

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侧壁开孔蜂窝夹芯结构的传热性能分析

航空动力学报 2024年第1期39卷 57-62页

作者：郑宁悦陈学孙创夏新林哈尔滨工业大学能源科学与工程学院哈尔滨150001

针对侧壁开孔蜂窝夹芯结构,建立了蜂窝单元高温辐射-导热耦合传热模型,采用有限元方法分析了内部传热机制,获得了其高温等效导热系数。讨论了开孔形状、开孔参数、孔排布形式等结构参数对等效导热系数的影响,拟合得到了等效导热系数的... 详细信息

针对侧壁开孔蜂窝夹芯结构,建立了蜂窝单元高温辐射-导热耦合传热模型,采用有限元方法分析了内部传热机制,获得了其高温等效导热系数。讨论了开孔形状、开孔参数、孔排布形式等结构参数对等效导热系数的影响,拟合得到了等效导热系数的计算关联式。研究表明:开孔形状对蜂窝单元等效导热系数几乎无影响;等效导热系数随孔隙率增大而减小,受开孔数影响较小。并联开孔相对于串联开孔时等效导热系数更低,孔隙率14%、孔数为4时等效导热系数比串联时小8.4%,相较于未开孔时降低16.1%。

关键词：蜂窝结构高温传热等效导热系数侧壁开孔有限元方法

Nitrate assimilation by marine heterotrophic bacteria

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Science China Earth Sciences 2016年第2期59卷 477-483页

作者： JIang xue Xia JIAO Nian zhi State Key Laboratory of Marine Environmental Science Xiamen University Institute of Marine Microbes and Ecospheres Xiamen University

Nitrate assimilation is a process where bacteria utilize nitrate as a nitrogen source and synthesize it into organic nitrogen. We found that nitrate-assimilating bacteria(NAB) are widely distributed in various marine environments, from surface to the deep ocean and sediment, which indicates that NAB are significant to the oceanic nitrogen cycle. Comparative genomic analysis revealed nitrate-assimilating genes(nas A) in these marine heterotrophic NAB showed different gene arrangements and diverse regulation systems. Summary on recent findings will contribute to understanding the process of nitrate assimilation in NAB and their ecological significance in the nitrogen cycle. A systematic analysis of a number of studies on bacterial nitrate assimilation in marine ecological systems was conducted to clarify directions for future research.

关键词： Nitrate assimilation Assimilatory nitrate reductase gene nas A Heterotrophic bacteria Marine molecular ecology

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基于宽度自编码网络的单分类集成算法

信号处理 2024年第4期40卷 776-788页

作者：施一帆陈宇昂曾焕强杨楷翔华侨大学工学院福建泉州362021 华南理工大学计算机科学与工程学院广东广州510006 计算机软件新技术国家重点实验室江苏南京210023

异常检测是模式识别领域的经典研究,然而在极端类别不平衡场景下,异常样本匮乏,训练数据仅包含正常样本,传统异常检测方法难以适用。因此,单分类算法逐渐受到关注,它只使用目标类样本构建决策边界,实现对非目标类样本的识别。目前单分... 详细信息

异常检测是模式识别领域的经典研究,然而在极端类别不平衡场景下,异常样本匮乏,训练数据仅包含正常样本,传统异常检测方法难以适用。因此,单分类算法逐渐受到关注,它只使用目标类样本构建决策边界,实现对非目标类样本的识别。目前单分类算法已经取得了显著进展,然而也存在一些局限性:(1)原始特征空间容易受噪声特征干扰;(2)单模型的单分类算法难以从多个特征空间学习更全面的决策边界;(3)缺少对先前模型的欠拟合样本进行针对性学习。为了解决这些问题,本文提出了基于宽度自编码网络的单分类集成算法(Ensemble One-class Classification Based on BLS-Autoencoder,EOC-BLSAE)。首先,本文设计了一种单分类宽度自编码网络模型(One-class BLS-Autoencoder,OC-BLSAE),它能高效学习原始特征空间到重构特征空间的非线性映射关系,利用重构误差构建决策边界;接着,本文设计了单分类Boosting策略,通过最小化全局重构损失,迭代学习欠拟合样本,从而多角度构建OC-BLSAE模型,并自适应评估模型的可靠性;最终,加权集成多个OC-BLSAE模型,有效提升整体算法准确性和鲁棒性。在实验中,本文在16个不同规模的单分类任务上进行参数实验、对比实验和消融实验,结果表明所提算法参数选择较为灵活,算法各模块能够相互协同,有效提升单分类任务的准确性和鲁棒性,整体性能超过前沿单分类方法。

关键词：单分类异常检测宽度学习系统集成学习

Down-regulation of survivin expression by small interfering RNA induces pancreatic cancer cell apoptosis and enhances its radiosensitivity

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World Journal of Gastroenterology 2006年第18期12卷 2901-2907页

作者： Hai-Tao Guan Xing-Huan xue zhi-Jun Dai Xi-Jing Wang ang Li zhao-Yin Qin Department of Oncosurgery the Second affiliated Hospital of Xi'an Jiaotong University Medical College Xi'an 710004 Shaanxi Province China Medical Research Center Affiliated Stomatological Hospital of Xi'an Jiaotong University Medical College Xi'an 710004 Shaanxi Province China Department of General Surgery the Second Affiliated Hospital of Xi'an Jiaotong University Medical College Xi'an 710004 Shaanxi Province China

AIM： To investigate the inhibitory effect of small interfering RNA （siRNA） on the expression of survivin in pancreatic cancer cell line PC-2 and the role of siRNA in inducing PC-2 cell apoptosis and enhancing its radiosensitivity. METHODS： A siRNA plasmid expression vector against survivin was constructed and transfected into PC-2 cells with LipofectamineTM 2000. The down regulation of survivin expression was detected by semi-quantitive RT-PCR and immunohistochemical SP method and the role of siRNA in inducing PC-2 cell apoptosis and enhancing its radiosensitivity was detected by flow cytometry. RESULTS： The sequence-specific siRNA efficiently and specifically down-regulated the expression of survivin at both mRNA and protein levels. The expression inhibition ratio was 81.25% at mRNA level detected by semlquantitive RT-PCR and 74.24% at protein level detected by immunohistochemical method. Forty-eight hours after transfection,apoptosis was induced in 7.03% cells by siRNA and in 14.58% cells by siRNA combined with radiation. CONCLUSION： The siRNA plasmid expression vector against survivin can inhibit the expression of survivin in PC-2 cells efficiently and specifically. Inhibiting the expression of survivin can induce apoptosis of PC-2 cells and enhance its radiosensitivity significantly. RNAi against survivin is of potential value in gene taerapy of pancreatic cancer.

关键词： RNA interference Survivin Pancreatic cancer Radiation

On the Key Dynamical Processes Supporting the 21.7 zhengzhou Record-breaking Hourly Rainfall in China

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Advances in Atmospheric Sciences 2023年第3期40卷 337-349页

作者： Peng WEI Xin XU Ming xue Chenyue z.ang Yuan Wang Kun zHAO ang zHOU Shushi z.ang Kefeng zHU Key Laboratory of Mesoscale Severe Weather/Ministry of Education and School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Center for Analysis and Prediction of Storms and School of Meteorology University of OklahomaNormanOklahoma 73072USA Key Laboratory of Transportation Meteorology of China Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210041China

An extremely heavy rainfall event occurred in zhengzhou,China,on 20 July 2021 and produced an hourly rainfall rate of 201.9 mm,which broke the station record for China's *** on radar observations and a convection-permitting simulation using the WRF-ARW model,this paper investigates the multiscale processes,especially those at the mesoscale,that support the extreme observed hourly *** show that the extreme rainfall occurred in an environment characteristic of warm-sector heavy rainfall,with abundant warm moist air transported from the ocean by an abnormally northward-displaced western Pacific subtropical high and Typhoon In-Fa(2021).However,rather than through back building and echo training of convective cells often found in warm-sector heavy rainfall events,this extreme hourly rainfall event was caused by a single,quasi-stationary storm in *** separation analysis reveals that the extreme-rainproducing storm was supported and maintained by the dynamic lifting of low-level converging flows from the north,south,and east of the *** low-level northerly flow originated from a mesoscale barrier jet on the eastern slope of the Taihang Mountain due to terrain blocking of large-scale easterly flows,which reached an overall balance with the southerly winds in association with a low-level meso-β-scale vortex located to the west of *** large-scale easterly inflows that fed the deep convection via transport of thermodynamically unstable air into the storm prevented the eastward propagation of the weak,shallow cold *** a result,the convective storm was nearly stationary over zhengzhou,resulting in record-breaking hourly precipitation.

关键词： extreme rainfall multiscale processes orography barrier jet low-level mesoscale vortex