检索结果-南通市图书馆

Improved photovoltaic performance of dye-sensitized solar cells by carbon-ion implantation of tri-layer titania film electrodes

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2015年第1期34卷 34-39页

作者： Jun Luo wei-Guang Yang Bin Liao Hai-Bo Guo wei-min shi Yi-Gang Chen School of Materials Science and Engineering Shanghai University College of Nuclear Science and Technology Beijing Normal University

TiO2 tri-layer structure films were modified by C-ions implantation for improving the photovoltaic perfor- mance of dye-sensitized solar cells （DSSCs）, in which the structure of TiOa changes from rutile to anatase and the sizes of TiOa particles increase. The optimal concentration of ions implantation for C-implanted cells is 1 ~ 1015 ***-2, and the maximum conversion efficiency of 5.32 % is achieved （luminous intensity of 1 sun, light irradiance of ***）, which is 25.2 % higher than that of unimplanted cell. The significant improvement in conversion efficiency by carbon- ion implantation is contributed to reducing charge recombi- nation and enhancing the light-harvesting ability, as indicated from incident photon-to-collected electron conversion effi- ciency （IPCE） and ultraviolet-visible （UV-Vis） measure- ments. Furthermore, the charge carrier＇s lifetime in the tri- layer titania films is prolonged after carbon-ion implantations.

关键词： Dye-sensitized solar cell Ion implantation Carbon Conversion efficiency Charge transfer

Moderate Deviations for Parameter Estimation in the Fractional Ornstein–Uhlenbeck Processes with Periodic Mean

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第5期40卷 1308-1324页

作者： Hui JIANG shi min LI wei Gang WANG School of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China The People's Bank of China Operations Ofice of Nanjing Branch Nanjing 210016P.R.China School of Statistics and Mathematics Zhejiang Gongshang UniversityHangzhou 310018P.R.China

In this paper,we study the asymptotic properties for the drift parameter estimators in the fractional Ornstein-Uhlenbeck process with periodic mean function and long range *** Cremér-type moderate deviations,as well ... 详细信息

关键词： Cramér-type moderate deviation fractional Ornstein-Uhlenbeck process parameter estimation multiple Wiener-Ito integrals

I_κB kinase-beta inhibitor attenuates hepatic fibrosis in mice

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2011年第47期17卷 5203-5213页

作者： Jue wei min shi wei-Qi Wu Hui Xu Ting Wang Na Wang Jia-Li Ma Yu-Gang Wang Department of Gastro-enterology Shanghai Changning Central Hospital Shanghai200336 China

AIM: To investigate the anti-fibrosis effect of IκB kinase-beta inhibitor (IKK2 inhibitor IMD0354) in liver fibrosis. METHODS: Twenty male C57BL6 mice were divided into four groups. Five high-fat fed mice were injected with lipopolysaccharide (LPS, 10 mg/kg) intraperitoneally and five high-fat fed mice were without LPS injection to build models of liver injury, and the intervention group (five mice) was injected intraperitoneally with IKK2 inhibitor (IMD 30 mg/kg for 14 d), while the remaining five mice received a normal diet as controls. Hepatic function, pathological evaluation and liver interleukin-6 (IL-6) expression were examined. Western blotting and real-time polymerase chain reaction were used to detect the expressions of nuclear factor-κB (NF-κB), alpha-smooth muscle actin (α-SMA), tumor growth factor-beta1 (TGF-β1), tumor necrosis factor-alpha (TNF-α), typeⅠand type Ⅲ collagen proteins and mRNA. RESULTS: A mouse model of liver injury was successfully established, and IMD decreased nuclear transloca-tion of NF-κB p65 in liver cells. In the IMD-treated group, the levels of alanine aminotransferase (103 ± 9.77 μ/L vs 62.4 ± 7.90 μ/L, P minotransferase (295.8 ± 38.56 μ/L vs 212 ± 25.10 μ/L, P < 0.05) were significantly decreased when compared with the model groups. The histological changes were significantly ameliorated. After treatment, the expressions of IL-6 (681 ± 45.96 vs 77 ± 7.79, P < 0.05), TGF-β1 (Western blotting 5.65% ± 0.017% vs 2.73% ± 0.005%, P < 0.05), TNF-α (11.58% ± 0.0063% vs 8.86% ± 0.0050%, P < 0.05), typeⅠcollagen (4.49% ± 0.014% vs 1.90% ± 0.0006%, P < 0.05) and type Ⅲ collagen (3.46% ± 0.008% vs 2.29% ± 0.0035%, P < 0.05) as well as α-SMA (6.19 ± 0.0036 μ/L vs 2.16 ± 0.0023 μ/L, P < 0.05) protein and mRNA were downregulated in the IMD group compared to the fibrosis control groups (P < 0.05). CONCLUSION: IKK2 inhibitor IMD markedly improved non-alcoholic fatty liver disease in mice by lowering NF-κB activation, which could be

关键词： Liver fibrosis IKK2 inhibitor Nuclear factor-kappa B Tumor growth factor-beta1 Interleukin-6 Alpha-smooth muscle actin C57BL mouse

A Quantum Private Query Protocol for Enhancing both User and Database Privacy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2018年第1期69卷 31-36页

作者： Yi-Hua Zhou Xue-wei Bai Lei-Lei Li wei-min shi Yu-Guang Yang Faculty of Information Technology Beijing University of TechnologyBeijing 100124China School of Computer Beijing University of Posts and TelecommunicationsBeijing 100876China

In order to protect the privacy of query user and database,some QKD-based quantum private query(QPQ)protocols were *** some of them cannot resist internal attack from database perfectly;some others can ensure better user privacy but require a reduction of database *** this paper,a novel two-way QPQ protocol is proposed to ensure the privacy of both sides of *** our protocol,user makes initial quantum states and derives the key bit by comparing initial quantum state and outcome state returned from database by ctrl or shift mode instead of announcing two non-orthogonal qubits as others which may leak part secret *** this way,not only the privacy of database be ensured but also user privacy is ***,our protocol can also realize the security of loss-tolerance,cheat-sensitive,and resisting JM attack etc.

关键词： quantum private query quantum key distribution JM attack quantum cryptography

Three-Party Quantum Key Agreement Protocol Based on Continuous Variable Single-Mode Squeezed States

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第12期71卷 1448-1454页

作者： Yi-Hua Zhou Jing Tan Jing Zhang wei-min shi Yu-Guang Yang Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Trusted Computing Beijing 100124China

The difficulty of quantum key agreement is to realize its security and fairness at the same *** paper presents a new three-party quantum key agreement protocol based on continuous variable single-mode squeezed *** three parties participating in the agreement are peer entities,making same contributions to the final *** one or two participants of the agreement cannot determine the shared key *** security analysis shows that the proposed protocol can resist both external and internal attacks.

关键词： continuous variable single-mode squeezed states quantum key agreement

Participant attack on the deterministic measurement-device-independent quantum secret sharing protocol

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 121-124页

作者： Yu-Guang Yang Yue-Chao Wang Yong-Li Yang Xiu-Bo Chen Dan Li Yi-Hua Zhou wei-min shi Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Beijing Key Laboralory of Trusted Computing Beijing 100124China Guangxi Key Laboratory of Crptography and Information Security Guilin 541004China Information Security Center State Key Laboratory of Networking and Switching TechnologyBeijing University of Posts and TelecommunicationsBeijing 100876China College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China

In a recent article[Gao et al.,***.63,120311(2020)],a two-receiver measurement-deviceindependent quantum secret sharing(MDI-QSS)protocol was *** was proven to be secure against eavesdropping and generalized to the multireceiver ***,the participant attack is a fatal threat to QSS ***,we highlight that a dishonest participant can obtain a sender’s secret message alone without introducing any detectable error,evidencing the vulnerability of the MDI-QSS protocol to the participant attack.

关键词： quantum cryptography quantum secret sharing participant attack

Rapid detection of nanoplastic particles by a luminescent Tb-based coordination polymer

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第5期35卷 529-533页

作者： Tiankai Sun Hui min Zongsu Han Liang Wang Peng Cheng wei shi Department of Chemistry College of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Separation Membranes and Membrane Processes School of Environmental Science and EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Advanced Energy Materials Chemistry(MOE) Frontiers Science Center for New Organic Matter and Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Nanoplastics(NPs)in aqueous environment have become a category of emerging pollutants on account of their potential risks to both human health and *** detection of NPs is a great challenge due to the lack of sensitive and selective sensing materials with fast response time and wide sensing range of particle ***,a Tb-based coordination polymer has been synthesized for luminescent detection of nanopolystyrene with different particle sizes in aqueous solutions,showing a low limit of detection,fast response time within 10 s and high selectivity in the presence of other ***“turn-on”sensing mechanism is studied in *** work provides a facile method for the fast detection of NPs.

关键词： Coordination polymer Nano polystyrene Luminescent detection Sensing mechanism Water safety

Concise extraction and characterization of the pore-throat network in unconventional hydrocarbon reservoirs: A new perspective

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第3期21卷 1474-1487页

作者： Shu-Heng Du Yong-min shi State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China School of Earth and Space Sciences Peking UniversityBeijing100871China

In this study,a new image-based method for the extraction and characterization of pore-throat network for unconventional hydrocarbon storage and exploitation is proposed.“Pore-throat solidity”,which is analogous to particle solidity,and a new method for automatic identification of pores and throats in tight sandstone oil reservoirs are ***,the“pore-throat combination”and“pure pore”are defined and distinguished by drawing the cumulative probability curve of the pore-throat solidity and by selecting an appropriate cutoff *** the discrete grid set is recognized as a pore-throat combination,Legendre ellipse fitting and minimum Feret diameter are *** the pore and throat grid sets are identified as pure pores,the pore diameter can be directly *** the new method,the analytical results for the physical parameters and pore radius agree well with most prior *** results comparing the maximum ball and the new model could also prove the accuracy of the latter's in micro and nano *** new model provides a more practical theoretical basis and a new calculation method for the rapid and accurate evaluation of the complex processes of oil migration.

关键词： Hydrocarbon exploitation Pore Throat Porous media Identification

Is the Cape Stone Forest in Shantou City formed by wave erosion? A comparison of the pedestal rocks on the coasts and the mountains of Queshi in eastern Guangdong, China

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第5期21卷 1447-1463页

作者： CHEN min WANG wei School of Geography South China Normal UniversityGuangzhou 510631China

Cape Stone Forest is a group of granite rock pillars(pedestal rocks) towering over shilin Lake, on the southern shore of Shantou Bay in eastern Guangdong, China. The rock pillars were previously identified as sea stacks because they have marine notch-like concave sidewalls at their base, and more importantly, the lake is immediately adjacent to the bay, which is exposed to the open sea. However, rock pillars similar in shape and size can also be found at the top of Queshi Mountain, which is only about 300 meters northwest of the lake and about 85 meters above sea level. Therefore, the marine origin of Cape Stone Forest is seriously questioned. In this study, 3D imagery and drone technology were used to collect data in the investigations without direct manual measurements in the water or on the mountain. It shows that the concave sidewalls of the rock pillars in the lake and on the mountains occur at different heights and are exposed to different directions, while a natural sea stack on Mayu Island at the mouth of Shantou Bay has a horizontal notch parallel to the sea level, although the granite rock of the sea stack is the same as that of the lake and the mountains. The eastern side of the island, where the sea stack is located, is exposed to the open sea but blocks large waves for the rock pillars in the lake. Therefore, the origin of Cape Stone Forest cannot be explained by wave-based mechanisms. The only satisfactory explanation that takes into account all the field evidence is that the narrow rock pillars of the lake and mountain were formed by chemical weathering that penetrated closely the spaced joints of the granite rock, and the notch-like concave sidewalls were formed by more effective chemical weathering at the base of the pillars.

关键词： Pedestal rock Granite Closely spaced joints Wave erosion Chemical weathering