检索结果-南通市图书馆

A revisited security evaluation of Simeck family ciphers against impossible differential cryptanalysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第3期66卷 297-298页

作者： Kai ZHANG Xuejia LAI Lei WANG jie guan Bin HU PLA SSF Information Engineering University Department of Computer Science and Engineering Shanghai Jiao Tong University

Simeck is a family of lightweight block ciphers proposed at CHES 2015 [1]. The round function and key schedule of Simeck were inspired by SIMON and SPECK, which were proposed by the U.S. National Security Agency in *** with these two lightweight ciphers, Simeck has a more compact hardware implementation. In addition,

关键词：

Analysis of the Global Swell Distributions Using ECMWF Re-Analyses Wind Wave Data

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2011年第4期10卷 325-330页

作者： ZHANG jie WANG Weili guan Changlong Physical Oceanography Laboratory Ocean University of ChinaQingdao 266100P.R.China

The existence of three well-defined tongue-shaped zones of swell dominance,termed as 'swell pools',in the Pacific,the Atlantic and the Indian Oceans,was reported by Chen et al.(2002)using satellite *** this paper,the ECMWF Re-analyses wind wave data,including wind speed,significant wave height,averaged wave period and direction,are applied to verify the existence of these swell *** swell indices calculated from wave height,wave age and correlation coefficient are used to identify swell *** wave age swell index can be more appropriately related to physical processes compared to the other two swell *** on the ECMWF data the swell pools in the Pacific and the Atlantic Oceans are confirmed,but the expected swell pool in the Indian Ocean is not *** seasonal variations of global and hemispherical swell indices are investigated,and the argument that swells in the pools seemed to originate mostly from the winter hemisphere is supported by the seasonal variation of the averaged wave *** northward bending of the swell pools in the Pacific and the Atlantic Oceans in summer is not revealed by the ECMWF *** swell pool in the Indian Ocean and the summer northward bending of the swell pools in the Pacific and the Atlan-tic Oceans need to be further verified by other datasets.

关键词： global swell distribution swell index wave age ECMWF Re-analyses data

Covalent modification of multiwalled carbon nanotubes with a low molecular weight chitosan

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第3期18卷 361-364页

作者： Gang Ke Wen Chao guan Chang Yu Tang Zhen Hu Wen jie guan Dan Lin Zeng Feng Deng Department of Chemistry Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 China Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China

Covalent modification of shortened multiwalled carbon nanombes （MWNTs） with a natural low molecular weight chitosan （LMCS） was accomplished by the nucleophilic substitution reaction. The LMCS modified MWNTs （MWNT-LMCS） were characterized by FTIR, solid-state ^13C NMR, and XPS spectroscopies, thermogravimetric analysis, and transmission electron microscopy. The results revealed that amino and primary hydroxyl groups of the LMCS participated mainly in the formation of the MWNT-LMCS conjugates. The MWNT-LMCS consists of 58 wt.% LMCS, and about four molecular chains of the LMCS were attached to 1000 carbon atoms of the nanotube sidewalls. As a novel derivative of the MWNTs, the MWNT-LMCS not only solved in DMF, DMAc and DMSO, but also in aqueous acetic acid solution.

关键词： Carbon nanotubes Chitosan Renewable resources Modification

Laryngospasm as an uncommon presentation in a patient with anti-N-methyl-D-aspartate receptor encephalitis:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第20期11卷 4961-4965页

作者： Lu Wang Hong-Jun Su guan-jie Song Department of Neurology Tianjin Baodi HospitalTianjin 301800China

BACKGROUND Anti-N-methyl-D-aspartate receptor(anti-NMDAR)encephalitis is a rare autoimmune *** symptoms of anti-NMDAR encephalitis include behavioral problems,speech problems,psychosis,seizures,and memory deficits,among ***,laryngospasm is *** present the case of a patient with anti-NMDAR antibodies and severe *** SUMMARY The patient was a 15-year-old female with normal psychomotor *** was initially admitted to our neurological intensive care unit with *** received anti-epilepsy treatment,and the seizures ***,2 wk later,she developed behavioral problems and speech ***,she developed severe laryngospasms,which were treated with intubation and a *** against the NMDAR were detected in the patient’s cerebrospinal ***,she was diagnosed with anti-NMDAR *** addition,she received intravenously administered immunoglobulins,and methylprednisolone was *** patient’s symptoms gradually improved,and she was discharged from our *** 9 mo later,the patient could speak sentences,walk independently,and carry out activities of daily living *** our case report,we highlighted laryngospasm as an uncommon presentation in patients with anti-NMDAR *** Laryngospasm may be an uncommon clinical manifestation of anti-NMDAR encephalitis.

关键词： Anti-N-methyl-D-aspartate receptor Laryngospasm Encephalitis Epilepsy Immunotherapy Case report

A Highly Selective Fluorescent Chemosensor for Cu2＋

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

Chemical Research in Chinese Universities 2015年第3期31卷 347-351页

作者： guan jie ZHANG Peng WEI Taibao LIN Qi YAO Hong ZHANG Youming Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education Key Laboratory of Polymer Materials of Gansu Province College of Chemistry and Chemical EngineeringNorthwest Normal University Lanzhou 730070 P.R.China

A new Zn2＋ probe L2-Zn（L2=naphthofuran carbonylhydrazone derivant） was synthesized as a fluores- cence chemosensor for Cu2＋, by which Cuz＋ ion could be detected with high selectivity and sensitivity in a wide pH range via a displacement ＂turn-off＂ signaling strategy. Whereas the coordination between Zn2＋ and L2 resulted in a considerable enhancement of typical luminescence of a naphthalofuran group in complex L2-Zn, the addition of Cu2＋ ion led to a dramatic decrease in the emission intensity of probe L2-Zn at about 503 nm（excitation at 423 nm）. The competitive fluorescent experiments showed that other metal ions, such as Hgz＋, Fe3＋, Ag＋, Ca2＋, Co2＋, Ni2＋, Cd2＋, Pb2＋, Zn2＋, Cr3＋ and Mg2＋ could not impact tile detection of Cu2＋. The detection limit of the novel probe L2-Zn for Cu2~ ion was as low as 2.3× 10 7 mol/L, which is far lower than the guideline value of 1.6× 10-5 mol/L of the United States Environmental Protection Agency.

关键词： Znic complex Fluorescent switch Copper ion Turn-off signal

New State Recovery Attacks on the Grain v1 Stream Cipher

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

China Communications 2016年第11期13卷 180-188页

作者： Lin Ding Chenhui Jin jie guan Shaowu Zhang Junzhi Li Hong Wang Wei Zhao Zhengzhou Information Science and Technology Institute 450000 Zhengzhou China Science and Technology on Communication Security Laboratory 610041 Chengdu China

The Grain v1 stream cipher is one of the seven finalists in the final e STREAM portfolio. Though many attacks have been published,no recovery attack better than exhaustive key search on full Grain v1 in the single key setting has been found yet. In this paper,new state recovery attacks on Grain v1 utilizing the weak normality order of the employed keystream output function in the cipher are proposed. These attacks have remarkable advantages in the offline time,online time and memory complexities,which are all better than exhaustive key search. The success probability of each new attack is 0.632. The proposed attack primarily depends on the order of weak normality of the employed keystream output function. This shows that the weak normality order should be carefully considered when designing the keystream output functions of Grain-like stream ciphers.

关键词： cryptanalysis grain v1 stream cipher weak normality order

Key techniques for evaluation of safety monitoring sensors in water conservancy and hydropower engineering

在线全文

学校读者我要写书评

暂无评论

Water Science and Engineering 2012年第4期5卷 440-449页

作者： Yan XIANG Lin WANG Zhan-jun WANG Hui YUAN Yun-jie guan Department of Dam Safety Management Nanjing Hydraulic Research Institute Xiaolangdi Dam Project Construction and Management Bureau of Ministry of Water Resources College of Hydrology and Water Resources Hohai University

For the evaluation of construction quality and the verification of the design of water conservancy and hydropower engineering projects, and especially for the control of dam safety operation behavior, safety monitoring sensors are employed in a majority of engineering projects. These sensors are used to monitor the project during the dam construction and operation periods, and play an important role in reservoir safety operation and producing benefits. With the changing of operating environments and run-time of projects, there are some factors affecting the operation and management of projects, such as a certain amount of damaged sensors and instability of the measured data. Therefore, it is urgent to evaluate existing safety monitoring sensors in water conservancy and hydropower engineering projects. However, there are neither standards nor evaluation guidelines at present. Based on engineering practice, this study examined some key techniques for the evaluation of safety monitoring sensors, including the evaluation process of the safety monitoring system, on-site detection methods of two typical pieces of equipment, the differential resistor sensor and vibrating wire sensor, the on-site detection methods of communication cable faults, and a validity test of the sensor measured data. These key techniques were applied in the Xiaolangdi Water Control Project and Xiaoxi Hydropower Project. The results show that the measured data of a majority of sensors are reliable and reasonable, and can reasonably reflect the structural change behavior in the project operating process, indicating that the availabilities of the safety monitoring sensors of the two projects are high

关键词： water conservancy and hydropower engineering safety monitoring sensor Xiaolangdi Water Control Project Xiaoxi Hydropower Project

Boosting Lattice Oxygen Oxidation of Perovskite to Efficiently Catalyze Oxygen Evolution Reaction by FeOOH Decoration

在线全文

学校读者我要写书评

暂无评论

Research 2020年第1期2020卷 1176-1190页

作者： Jia-Wei Zhao Cheng-Fei Li Zi-Xiao Shi jie-Lun guan Gao-Ren Li MOE Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-Carbon Chemistry&Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China

In the process of oxygen evolution reaction(OER)on perovskite,it is of great significance to accelerate the hindered lattice oxygen oxidation process to promote the slow kinetics of water *** this paper,a facile surface modification strategy of nanometerscale iron oxyhydroxide(FeOOH)clusters depositing on the surface of LaNiO_(3)(LNO)perovskite is reported,and it can obviously promote hydroxyl adsorption and weaken Ni-O bond of *** above relevant evidences are well demonstrated by the experimental results and DFT *** excellent hydroxyl adsorption ability of FeOOH-LaNiO_(3)(Fe-LNO)can obviously optimize OH-filling barriers to promote lattice oxygen-participated OER(LOER),and the weakened Ni-O bond of LNO perovskite can obviously reduce the reaction barrier of the lattice oxygen participation mechanism(LOM).Based on the above synergistic catalysis effect,the Fe-LNO catalyst exhibits a maximum factor of 5 catalytic activity increases for OER relative to the pristine perovskite and demonstrates the fast reaction kinetics(low Tafel slope of 42mVdec^(-1))and superior intrinsic activity(TOFs of~40 O2 S^(-1)at 1.60V ***).

关键词： perovskite Oxygen kinetics

New computational treatment of optical wave propagation in lossy waveguides

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

Frontiers of Information Technology & Electronic Engineering 2015年第8期16卷 646-653页

作者： Jian-xin ZHU guan-jie WANG Department of Mathematics Zhejiang University

In this paper, the optical wave propagation in lossy waveguides is described by the Helmholtz equation with the complex refractive-index, and the Chebyshev pseudospectral method is used to discretize the transverse operator of the equation. Meanwhile, an operator marching method, a one-way re-formulation based on the Dirichlet- to-Neumann （DtN） map, is improved to solve the equation. NumericM examples show that our treatment is more efficient.

关键词： Adjoint operator Orthogonal Chebyshev Pseudospectral method Dirichlet-to-Neumann map