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分组密码FBC的截断差分分析

密码学报（中英文） 2024年第3期11卷 602-620页

作者：邹光南刘端贾珂婷张国艳清华大学计算机科学与技术系北京100084 山东大学网络空间安全学院青岛266237 清华大学网络科学与网络空间研究院北京100084 中关村实验室北京100194 密码技术与信息安全教育部重点实验室青岛266237 山东区块链研究院济南250101

为了促进密码算法的设计和实现,中国密码学会(CACR)于2018年举办全国密码算法设计竞赛,其中FBC算法是晋级到第二轮的十个算法之一.FBC有三个版本,即FBC128-128、FBC128-256和FBC256-256,分别能够支持128比特和256比特长度的明文和密钥.... 详细信息

为了促进密码算法的设计和实现,中国密码学会(CACR)于2018年举办全国密码算法设计竞赛,其中FBC算法是晋级到第二轮的十个算法之一.FBC有三个版本,即FBC128-128、FBC128-256和FBC256-256,分别能够支持128比特和256比特长度的明文和密钥.FBC算法采用4路两重Feistel结构设计,便于硬件实现.本文利用中间相遇的截断差分构造方法,针对FBC加密算法,为FBC-128算法构造了11轮概率为2^(-108)的截断差分路线,基于该区分器,对FBC-128算法第一次给出15轮密钥恢复攻击,其中攻击的数据复杂度为2^(99)选择密文,时间复杂度是2^(100)次15轮加密,比已有的分析结果提高了3轮.对于256比特分组长度的FBC-256算法构造了15轮概率为2^(-236)的截断差分路线,基于该区分器,对FBC-256算法给出了20轮密钥恢复攻击,攻击的数据复杂度为2^(227)选择密文量,时间复杂度是2^(222.6)次20轮加密.

关键词：分组密码 FBC 截断差分密码分析

人与自然和谐共生的中国式现代化:科学内涵、战略要求与实现路径

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岭南学刊 2024年第2期 18-31,119页

作者：张艳国罗斌华华中师范大学湖北武汉430079 江西省生态文明研究院江西南昌330036

以习近平同志为代表的当代中国共产党人战略性、创造性、前瞻性地提出了人与自然和谐共生的中国式现代化重大命题,对于全面推进中国式现代化建设具有重要的战略意义和现实的指导作用。建设人与自然和谐共生的中国式现代化,必须深入认识... 详细信息

以习近平同志为代表的当代中国共产党人战略性、创造性、前瞻性地提出了人与自然和谐共生的中国式现代化重大命题,对于全面推进中国式现代化建设具有重要的战略意义和现实的指导作用。建设人与自然和谐共生的中国式现代化,必须深入认识其本质内涵,科学掌握其发展规律,精准切入其实践路径,站在人与自然和谐共生的时代高度和中国式现代化建设的全局,科学谋划、综合施策、系统推进,加快建设人与自然和谐共生的现代化,打造人与自然和谐共生的美丽中国和清洁美丽世界,不断创新人类文明新形态。人与自然和谐共生,既是中国式现代化的特征,又是其要求;既是中国式现代化的前提条件,也是衡量中国式现代化成功的准则和标志;既是中国道路的有机内容,又是中国治理的重要视点。因此,无论是从中国式现代化发展与中国特色社会主义事业的角度,还是从中国道路与中国治理的视角,抑或是从中国与世界、中国与人类命运共同体的切入点来看,推进人与自然和谐共生的中国式现代化都具有重大意义和深远影响。

关键词：人与自然和谐共生中国式现代化生态文明美丽中国

ANALYTICAL STUDY ON FLOW PROCESS OF FLOATING-OIL RECOVERY DEVICE FROM OIL-CONTAMINATED SEAWATER BY MHD METHOD

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Journal of Hydrodynamics 2007年第2期19卷 195-200页

作者： zhang guo-yan PENG yan ZHAO Ling-zhi LI Ran SHA Ci-wen Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100080 China

A new method of recovering maritime oil-spill based on electromagnetic force, the so-called MHD oil-spill recovery method was proposed in the IEECAS. The operating process of MHD channel was described in this article. Numerical study was carried out using a two-dimensional water-air two-phase model and the VOF method. The agreement between the numerical and the experimental results was reached.

关键词： numerical simulation water-air two phaseflow VOF method MHD

Hydrothermal Synthesis,Crystal Structure and Thermal Analysis of a Dinuclear Complex Cd_2(3,5-Dinitrobenzoate)_4(pyridine)_4

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1297-1302页

作者： guo Jin-Yu zhang Tong-Lai zhang Jian-guo LIU yan-Hong QIAO Xiao-Jing yanG Li State Key Laboratory of Explosion Science and Technology Beij＇ing Institute of Technology Beij＇ing 100081 China

A dinuclear complex Cd2（dnba）4（pyridine）4 （dnba = 3,5-dinitrobenzoate） has been synthesized by hydrothermal method and characterized by X-ray single-crystal diffraction, elemental analysis, FT-IR spectroscopy, DSC and TG-DTG techniques. The complex with empirical formula C48H32Cd2NI2024 （Mr = 692.83） crystallizes in monoclinic, space group P21/n with a - 12.0344（14）, b = 10.5752（13）, c = 21.578（3） A, β = 104.150（2）°, V = 2662.8（6） A^3, Z = 2, D, = 1.728 g/cm^3,μ（MoKa） = 0.897 mm^-1, F（000） = 1384, S = 1.016 and （△/σ）max = 0.001. R = 0.0638 and wR = 0.0737 for all data; the final R = 0.0337 and wR = 0.0644. In this complex, four carboxylates are bidentate-or chelate-coordinated with the Cd（Ⅱ） centers to give the dinuclear structure. The other coordination positions of Cd（Ⅱ） are occupied by the lone pair electrons from N of four pyridines. Thermal analyses DSC and TG-DTG have been used to determine the thermal decomposition mechanism of the title complex.

关键词： hydrothermal synthesis dinuclear complex crystal structure thermal analysis

Synthesis,Crystal Structure and Magnetic Behavior of a Novel Cd(Ⅱ) Complex with Four Nitroxide Radicals

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Chemical Research in Chinese Universities 2010年第2期26卷 170-173页

作者： GAO Dong-zhao zhang guo-ying XU yan-yan SUN Ya-qiu Tianjin Key Laboratory of Structure and Performance for Functional Molecule College of Chemistry and Life ScienceTianjin Normal UniversityTianjin 300387P.R.China

A novel diamagnetic-metal Cd（Ⅱ） complex with four nitroxide radicals[Cd（IM4Py）4Cl2]（IM4Py=2-（4＇-pyridinyl）-4,4,5,5-tetramethylimidazoline-1-oxyl） was synthesized and characterized by elemental analyses,IR spectra,UV-Vis spectra and X-ray single crystal *** complex crystallized in triclinic space group P1 with a=0.93285（14） nm,b=1.16827（18） nm,c=1.3660（2） nm,α=112.759（2）°,β=104.524（2）°,γ=92.008（3）°,V= 1.3143（3） nm3,Z=1,Dc=1.335 g/cm3,the final R1=0.0423 and wR2=*** the title complex,each Cd（Ⅱ） ion adopting a distorted octahedral geometry is coordinated by two Cl-anions and four pyridyl-N atoms from four IM4Py *** magnetic measurements show the weak antiferromagnetic interactions between the nitroxide radicals.

关键词： Cd(Ⅱ) complex Nitroxide radical Crystal structure Magnetic behavior

变异系数法-AHP复合加权联用TOPSIS模型优选白附片降毒增效炮制工艺

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中国现代中药 2024年第4期26卷 685-694页

作者：姚文燕刘宸张国彦黄壮壮刘峰大理大学药学院云南大理671000 陕西师范大学生命科学学院西北濒危药材资源开发国家工程实验室/药用资源与天然药物化学教育部重点实验室陕西西安710119 城固县群利中药材专业合作社陕西汉中723000 陕西国际商贸学院陕西咸阳712046 陕西步长制药有限公司陕西西安710075

目的:运用变异系数法-层次分析法(AHP)复合加权联用TOPSIS优选白附片炮制工艺参数,为白附片规范化炮制提供参考。方法:以煮制时间、浸漂时间和蒸制时间为考察因素,以穷举寻根法开展试验设计,以苯甲酰新乌头原碱、苯甲酰乌头原碱、苯甲... 详细信息

目的:运用变异系数法-层次分析法(AHP)复合加权联用TOPSIS优选白附片炮制工艺参数,为白附片规范化炮制提供参考。方法:以煮制时间、浸漂时间和蒸制时间为考察因素,以穷举寻根法开展试验设计,以苯甲酰新乌头原碱、苯甲酰乌头原碱、苯甲酰次乌头原碱、新乌头碱、次乌头碱、乌头碱、水分、灰分和胆巴残留量为评价指标,以变异系数法-AHP复合加权计算权重系数,通过TOPSIS模型优选白附片炮制工艺参数。结果:白附片最优炮制工艺参数为煮制20 min、浸漂48 h、蒸制3 h。结论:该工艺稳定、可行,可为白附片的规模化加工炮制提供参考。

关键词：白附片炮制工艺灰分胆巴单酯型生物碱双酯型生物碱

Molecular Basis for Stereospecific Hydrolysis of Ethyl Mandelate by Thermophilic Esterase

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Chemical Research in Chinese Universities 2011年第5期27卷 841-844页

作者： zhang guo-yan TAO Jin ZHENG Liang-yu CAO Shu-gui Key Laboratory for Molecular Enzymology and Engineering Ministry of Education College of Chemistry Jilin University Changchun 130012 P. R. China

The stereospecific hydrolysis of mandelate can be effectively catalyzed by hyperthermophilic acylpeptide esterase APE 1547（Aeropyrum pernix esterase 1547）. APE 1547 used in this reaction showed a remarkable stereodi-scrimination in favour of R-mandelic acid（99% e.e.） with an enantiomeric ratio E〉200. The results of computer simulation are consistent with the experimental results. It can be inferred that the R-substrate adopted a binding mode productive of the reaction due to the formation of the hydrogen bond at the active site of APE 1547.

关键词： Hyperthermophilic acylpeptide esterase Biocatalyst Stereospecific hydrolysis Mandelic acid Computer simulation

An effective strategy of constructing multi-metallic oxides of ZnO/ CoNiO_(2)/CoO/C microflowers for improved supercapacitive performance

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Chinese Journal of Chemical Engineering 2024年第3期67卷 1-8页

作者： Wei guo yan zhang Xiaxin Lei Shuang Wang College of Physics Taiyuan University of TechnologyJinzhong 030600China College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

In this work,a new ZnO/CoNiO_(2)/CoO/C metal oxides composite is prepared by cost-effective hydrothermal method coupled with annealing process under N_(2) ***,the oxidation-defect annealing environment is conducive to both morphology and component of the composite,which flower-like ZnO/CoNiO_(2)/CoO/C is *** from good chemical stability of ZnO,high energy capacity of CoNiO_(2) and CoO and good conductivity of C,the as-prepared sample shows promising electrochemical behavior,including the specific capacity of 1435 C·g^(-1) at 1 A·g^(-1),capacity retention of 87.3%at 20 A·g^(-1),and cycling stability of 90.5%for 3000 cycles at 5 A·g^(-1),***,the prepared ZnO/CoNiO_(2)/CoO/C/NF//AC aqueous hybrid supercapacitors device delivers the best specific energy of 55.9 W·h·kg^(-1) at 850 W·kg^(-1).The results reflect that the as-prepared ZnO/CoNiO_(2)/CoO/C microflowers are considered as high performance electrode materials for supercapacitor,and the strategy mentioned in this paper is benefit to prepare mixed metal oxides composite for energy conversion and storage.

关键词： Composites Electrochemistry Hydrothermal Transition metal oxides Structural control Supercapacitors

SCAB1 coordinates sequential Ca^(2+) and ABA signals during osmotic stress induced stomatal closure in Arabidopsis

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Science China(Life Sciences) 2024年第1期67卷 1-18页

作者： Tianren zhang Li Bai yan guo State Key Laboratory of Plant Environmental Resilience College of Biological SciencesChina Agricultural UniversityBeijing 100193China

Hyperosmotic stress caused by drought is a detrimental threat to plant growth and agricultural productivity due to limited water *** are gateways of transpiration and gas exchange,the swift adjustment of stomatal aperture has a strong influence on plant drought *** intensive investigations of stomatal closure during drought stress in past decades,little is known about how sequential signals are integrated during complete ***,we discovered that the rapid Ca^(2+) signaling and subsequent abscisic acid(ABA)signaling contribute to the kinetics of both F-actin reorganizations and stomatal closure in Arabidopsis thaliana,while STOMATAL CLOSURE-RELATED ACTIN BINDING PROTEIN1(SCAB1)is the molecular switch for this entire *** the early stage of osmotic shock responses,swift elevated calcium signaling promotes SCAB1 phosphorylation through calcium sensors CALCIUM DEPENDENT PROTEIN KINASE3(CPK3)and *** phosphorylation restrained the microfilament binding affinity of SCAB1,which bring about the Factin disassembly and stomatal closure *** the osmotic stress signal continued,both the kinase activity of CPK3 and the phosphorylation level of SCAB1 attenuated *** further found that ABA signaling is indispensable for these attenuations,which presumably contributed to the actin filament reassembly process as well as completion of stomatal ***,the dynamic changes of SCAB1 phosphorylation status are crucial for the kinetics of stomatal *** together,our results support a model in which SCAB1 works as a molecular switch,and directs the microfilament rearrangement through integrating the sequentially generated Ca^(2+) and ABA signals during osmotic stress induced stomatal closure.

关键词： calcium signal ABA stomatal movement microfilaments kinase