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Searching for impossible subspace trails and improved impossible differential characteristics for SIMON-like block ciphers

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Cybersecurity 2021年第1期4卷 237-250页

作者： Xuzi Wang Baofeng Wu lin hou Dongdai lin State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesBeijing 100093China School of Cyber Security University of Chinese Academy of SciencesBeijing 100049China

In this paper,we greatly increase the number of impossible differentials for SIMON and SIMECK by eliminating the 1-bit constraint in input/output difference,which is the precondition to ameliorate the complexity of *** propose an algorithm which can greatly reduce the searching complexity to find such trails efficiently since the search space exponentially expands to find impossible differentials with multiple active *** is another situation leading to the contradiction in impossible differentials except for *** show how the contradiction happens and conclude the precondition of it defined as *** makes our results more comprehensive by applying these two approach *** paper gives for the first time impossible differential characteristics with multiple active bits for SIMON and SIMECK,leading to a great increase in the *** results can be verified not only by covering the state-of-art,but also by the MILP model.

关键词： Impossible differential characteristics Impossible subspace trails Miss-from-the-middle SIMON SIMECK

Presentation of the Berry-Tabor conjecture in Levy plates

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Chinese Physics B 2024年第10期33卷 240-247页

作者： Chao Li Guo-lin hou School of Mathematical Sciences Inner Mongolia UniversityHohhot 010021China

The Berry-Tabor(BT)conjecture is a famous statistical inference in quantum chaos,which not only establishes the spectral fluctuations of quantum systems whose classical counterparts are integrable but can also be used to describe other wave *** this paper,the BT conjecture has been extended to Lévy *** predicted by the BT conjecture,level clustering is present in the spectra of Lévy *** consequence of level clustering is studied by introducing the distribution of nearest neighbor frequency level spacing ratios P(r),which is calculated through the analytical solution obtained by the Hamiltonian *** work investigates the impact of varying foundation parameters,rotary inertia,and boundary conditions on the frequency spectra,and we find that P(r)conforms to a Poisson distribution in all *** reason for the occurrence of the Poisson distribution in the Lévy plates is the independence between modal frequencies,which can be understood through mode functions.

关键词： Berry-Tabor conjecture frequency spectra Hamiltonian approach Lévy plates

Perturbation of Spectra for a Class of 2×2 Operator Matrices

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Acta Mathematicae Applicatae Sinica 2012年第4期28卷 711-720页

作者： ALATANCANG Guo-lin hou Guo-jun HAI School of Mathematical Sciences Inner Mongolia University

In this paper, we study the perturbation of spectra for 2 ×2 operator matrices such as Mx ={A0 XB） AC and Mz = （Az CB） on the Hilbert space H K and the sets……

关键词： operator matrices point spectrum residual spectrum continuous spectrum perturbation ofspectrum

Zinc tin oxide thin films prepared by MOCVD with different Sn/Zn ratios

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Rare Metals 2017年第9期36卷 753-757页

作者： Ying Xu lin-Yan hou Xiao-Meng Zhang Zhang Hebei Province Key Laboratory of Inorganic Nonmetallic Materials Materials Science and Engineering CollegeNorth China University of Science and TechnologyTangshan 063009China

Zinc tin oxide（ZTO） thin films, with zinc acetate and tributyltin chloride as raw materials, were deposited on glass substrates by the method of metal organic chemical vapor deposition（MOCVD）. The crystallization, microstructure and optical properties were investigated by scanning electronic microscope（SEM）,X-ray diffraction（XRD） and ultraviolet-visible（UV-Vis）spectrophotometer. The results show that with the increase in Sn/Zn ratio, the crystal changes from wurtzite to rutile phase. When the ratio reaches 11：18,the intensity of Zn2SnO4 peaks appears to be the strongest and the optical band gap is about 3.27 eV. Calculated by the envelope method, the thickness of the ZTO thin films is 713.24 *** by UV-Vis spectrophotometer, the transmittance of the ZTO thin films reaches up to 80% in the wavelength range of 400-1000 nm when the Sn/Zn ratio is 7：18.

关键词： Sn/Zn ratio MOCVD ZTO thin films Envelope method Optical properties

General construction of revocable identity-based fully homomorphic signature

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Science China(Information Sciences) 2020年第3期63卷 266-271页

作者： Congge XIE Jian WENG Wei LU lin hou College of Information Science and Technology Jinan University School of Data and Computer Science Sun Yat-sen University

Dear editor,Fully homomorphic signature (FHS) is a cryptographic primitive and allows anyone to conduct any computations over signatures and generate a signature which, when verified, matches the calculated value of the computational run on the messages. An identity-based fully homomorphic signature (IBFHS) extended from an FHS can avoid

关键词： General construction of revocable identity-based fully homomorphic signature

N-doped core-shell mesoporous carbon spheres embedded by Ni nanoparticles for CO_(2)electroreduction

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Rare Metals 2023年第7期42卷 2284-2293页

作者： Juan Du Qin-Yan lin Jian-Qi Zhang Sen-lin hou Ai-Bing Chen College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang050018China The Second Hospital of Hebei Medical University Shijiazhuang050000China

Herein,we successfully prepare highly dispersed and uniform small nano-size nickel nanoparticles embedded on core-shell carbon spheres by confined-deposition *** mesoporous silica layer containing surfactant coated on the surface of the polymer sphere provides confined space and effectively controls the growth of nickel nanoparticles during *** the same time,the introduction of nickel species has an impact on structure of the obtained carbon spheres,and it can promote the deposition of carbon to realize the adjustment from hollow to core-shell and then to solid *** to the uniform distribution of Ni nanoparticles with small size,mesoporous structure,N-doping groups,high specified surface areas,and core-shell structure,the obtained catalyst shows exciting ability for the production of CO by reduction of CO_(2)with a maximum CO Faradaic efficiency of 98%,indicating its promising prospect in electro-reduction of CO_(2).

关键词： Core-shell carbon spheres Small nano-size nickel nanoparticles Confined space Carbon deposition CO_(2)electroreduction

Incorporating functional annotation information in prioritizing disease associated SNPs from genome wide association studies

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Science China(Life Sciences) 2014年第11期57卷 1072-1079页

作者： hou lin MA TianZhou ZHAO HongYu Department of Biostatistics Yale School of Public Health VA Cooperative Studies Program Coordinating Center Department of Biostatistics University of Pittsburgh

With recent advances in genotyping and sequencing technologies,many disease susceptibility loci have been ***,much of the genetic heritability remains unexplained and the replication rate between independent studies is still ***,there have been increasing efforts on functional annotations of the entire human genome,such as the Encyclopedia of DNA Elements(ENCODE)project and other similar *** has been shown that incorporating these functional annotations to prioritize genome wide association signals may help identify true association ***,to our knowledge,the extent of the improvement when functional annotation data are considered has not been studied in the *** this article,we propose a statistical framework to estimate the improvement in replication rate with annotation data,and apply it to Crohn’s disease and DNase I hypersensitive *** results show that with cell line specific functional annotations,the expected replication rate is improved,but only at modest level.

关键词： prioritization functional annotation genome wide association studies

Tunable Band Gap in Piezoelectric Composite Rod Based on the Inter-Coupling Effect

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Chinese Physics Letters 2018年第5期35卷 60-64页

作者： Ze-Qun Fang Zhi-lin hou School of Physics and Optoelectronics South China University of Technology

The longitudinal wave propagating in one-dimensional periodic piezoelectric composite rod with inter-coupling between different piezoelectric segments is investigated. The analytical formulae for such a structure are shown and the dispersion relation is calculated. The results show that, by introducing the inter-coupling between the different piezoelectric segments, which is accomplished by serially connecting every n piezoelectric segment into supercells, some tunable Bragg band gaps can accordingly be opened in the low frequency region. The investigation could provide a new guideline for the tunable phononic crystal under passive control.

关键词： UUT Tunable Band Gap in Piezoelectric Composite Rod Based on the Inter-Coupling Effect TP BG TN

Preparation of CaO-Al_2O_3-SiO_2 system glass from molten blast furnace slag

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International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 169-174页

作者： Ying Xu Yong-zang Zhang lin-yan hou Xiang Lu College of Material Science and Engineering Hebei United University Xingtai Iron and Steel Co. Ltd.

To use the potential heat of molten blast furnace slag completely, a CaO-Al2O3-SiO2 system glass （MSG） was prepared from the molten industrial slag. The corresponding method proposed in this study utilized both slag and its potential heat, improving the production rate and avoiding the environmental pollution. Using appropriate techniques, an MSG with uniform color and superior performances was produced. Based on the experimental results and phase diagram, the chemical composition of MSG by mass is obtained as follows：CaO 27%-33%, SiO2 42%-51%, Al2O3 11%-14%, MgO 6%-8%, and Na2O＋K2O 1%-4%. Thermodynamic processes of MSG preparation were analyzed, and the phases and microstructures of MSG were investigated by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The results show that alkali metal oxides serve as the fluxes, calcium oxide serves as the stabilizer, and alumina reinforces the Si-O network. XRD and SEM analyses show that, the prepared MSG displays the glass-feature patterns, the melting process is more complete, and the melt viscosity is lowered with an increase in calcium oxide content;however, a continuous increase in slag content induces the crystalli-zation of glass, leading to the formation of glass subphase. The optimum content of molten slag in MSG is 67.37wt%. With respect to bend-ing strength and acid/alkali resistance, the performance of MSG is better than that of ordinary marble.

关键词： industrial wastes slag glass thermodynamics microstructure waste utilization heat recovery