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Diffusion and Security Evaluation of Feistel-PG

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Chinese Journal of Electronics 2017年第4期26卷 734-739页

作者： wang yanfeng WU Wenling ZHANG Lei Trusted Computing and Information Assurance Laboratory Institute of Software Graduate University of Chinese Academy of Sciences State Key Laboratory of Computer Science Institute of Software

Feistel-PG structure is a new specific Generalized Feistel structure(GFS) adopted in DBlock and LHash. Its main feature is adding a sbox-size permutation before the round function. Different choices of the permutation may affect the security property of ciphers with Feistel-PG structure but how it effects is not clear. We evaluate the values of diffusion round for all possible parameters and summarize the characteristics of optimum shuffles. The results show that one special kind of FeistelPG achieves full diffusion in less cost than the improved GFS. This advantage may attract the designers’ interests and this kind of Feistel-PG ciphers are suggested to designers. We also evaluate the security of suggested ciphers against various byte-oriented attacks, including differential cryptanalysis, linear cryptanalysis, impossible differential attack and integral attack. Some permutations with optimum diffusion but relatively weaker security are filtered out and these permutations should be avoided by designers.

关键词： Block cipher Diffusion Cryptanalysis GFS Feistel-PG

Remote　sensing　composite　information　of　Nansha　reef`s　closed　atoll　and　model　of　its　spatial　structur

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Acta Oceanologica Sinica 1997年第2期16卷 193-199页

作者： wang, yanfeng Liu, Baoyin First Oceanography Institute State Oceanic Administration Qingdao 266003 China

ＢａｓｅｄｏｎｔｈｅＮａｎｓｈａｌｓｌａｎｄｓ，ｃｌｔｔｓｅｌａｔｏｌｌｃｏｎｏｅｐｔｉｏｎ－ｒｅｎｔｏｔｅｓｅｎａｉｎｇｓｙｓｔｅｔｎｉｎＰｕｔＩ，ｔｈｒｏｕｇｈｔｈｅｓｏｌｕｔｉｏｎｏｆｔｈｅｉｔｆｏｔｍａｔｉｏ... 详细信息

ＢａｓｅｄｏｎｔｈｅＮａｎｓｈａｌｓｌａｎｄｓ，ｃｌｔｔｓｅｌａｔｏｌｌｃｏｎｏｅｐｔｉｏｎ－ｒｅｎｔｏｔｅｓｅｎａｉｎｇｓｙｓｔｅｔｎｉｎＰｕｔＩ，ｔｈｒｏｕｇｈｔｈｅｓｏｌｕｔｉｏｎｏｆｔｈｅｉｔｆｏｔｍａｔｉｏｎｆｕｎｃｔｉｏｎｖａｌｕｅａｎｄｉｓｏｓｔａｔｉｃｖａｌｕｅｏｆｃｌａａｘｌａｎｄｑｕａｓｉ－ｃｌｏｓａｌａｔｏｌｌ，ａｎｄｂｙｕｓｉｎｇｔｏｐｏｌｏｇｉｃａｌａｎｄｙｓｉｓｏｎｇｒｏｗｔｈｆｏｒｍａｎｄｔｈｅｃｏｍｐａｉｔｅｒｅｍｏｔｅｓｅｎｓｉｎｇｑｕａｎｔｂａｔｉｏｎｄａｔａａｓｔｈｅｃｕｌａｔｉｎｇｃｅｆｆｉｃｉｅｎｔｓ，ｔｈｅｆａｔｕｒｅｖｅｖｅｃｔｏｒｓｙｓｔｅｍａｎｄｉｔｓｍａｔｈｅｍａｔｉｃａｌｍｏｄｅｌｏｆｔｗｏｋｉｎｄｓｏｆａｔｏｌｌａｒｅｂｕｉｌｔ，ａｎｄｔｈｅｍｕｌｔｉｖａｒｉａｔｅａｎａｌｙｓｉｓｉｓｍａｄｅｗｉｔｈｓｏｍｅｅｘａｍｐｌｅｓ．

关键词： information reef`s composite closed Nansha Remote

Remote sensing composite information's trend surface analysis of Nansha Islands coral islets and reefs' top

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Acta Oceanologica Sinica 1999年第1期18卷 87-96页

作者： Liu Baoyin and wang yanfeng First Institute of Oceanography State Oceanic Administration Qingdao 266003 China

Based on the remote sensing information feature of Nansha coral islets and reefs that controlled by the Nansha Islands local area's goological structure and growth law, by means of mathematical model and PC, the Nansha Islands coral islets and reefs' top geological data' spatial distribution and local change trend are simulated by using the trend surface system on the remote sensing composite information, and an scientific interpretation and local comparison of Nansha coral islands and islets' spatial distribution feature are made.

关键词： Nansha Islands coral reefs remote sensing geomorphology trend surface mathematical model

Objective array design for three-dimensional temperature and salinity observation:Application to the South China Sea

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Acta Oceanologica Sinica 2022年第7期41卷 65-77页

作者： Mengxue Qu Zexun Wei yanfeng wang Yonggang wang Tengfei Xu First Institute of Oceanography and Key Laboratory of Marine Science and Numerical ModelingMinistry of Natural ResourcesQingdao266061China Laboratory for Regional Oceanography and Numerical Modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China Shandong Key Laboratory of Marine Science and Numerical Modeling Qingdao266061China

In this study,a moored array optimization tool(MAOT)was developed and applied to the South China Sea(SCS)with a focus on three-dimensional temperature and salinity *** of the MAOT involves two steps:(1)deriving a set of optimal arrays that are independent of each other for different variables at different depths based on an empirical orthogonal function method,and(2)consolidating these arrays using a K-center clustering *** with the assumed initial array consisting of 17 mooring sites located on a 3°×3°horizontal grid,the consolidated array improved the observing ability for three-dimensional temperature and salinity in the SCS with optimization efficiencies of 19.03%and 21.38%,*** with an increased number of moored sites showed that the most cost-effective option is a total of 20 moorings,improving the observing ability with optimization efficiencies up to 26.54%for temperature and 27.25%for *** design of an objective array relies on the ocean phenomenon of interest and its spatial and temporal *** this study,we focus on basin-scale variations in temperature and salinity in the SCS,and thus our consolidated array may not well resolve mesoscale *** MAOT can be extended to include other variables and multi-scale variability and can be applied to other regions.

关键词： optimal array design observation system simulation experiment South China Sea empirical orthogonal function K-center clustering

Remote sensing expert system of South China Sea coral reefs

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Acta Oceanologica Sinica 1996年第4期15卷 437-445页

作者： wang yanfeng and Liu Baoyin First Institute of Oceanography State Oceanic Administration Qingdao 266003 China

Based on the remote sensing information and related condition such as geology, geomorphology, hydrology and meteorology, a remote sensing expert system of the South China Sea coral reefs is developed by using a new remote sensing twin-tree structure. The object is recognized and the type of coral reef is distinguished through the combined utilization of spectrum and image primitive's spatial relation and related information.

关键词： South China Sea coral reef remote sensing expert system

Precision Motion Control of Hydraulic Actuator Using Adaptive Back-Stepping Sliding Mode Controller

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Computer Modeling in Engineering & Sciences 2024年第11期141卷 1047-1065页

作者： Zhenshuai Wan Longwang Yue yanfeng wang Pu Zhao Henan Key Laboratory of Superhard Abrasives and Grinding Equipment Henan University of TechnologyZhengzhou450001China School of Mechanical and Electrical Engineering Henan University of TechnologyZhengzhou450001China

Hydraulic actuators are highly nonlinear when they are subjected to different types of model uncertainties and dynamic *** unfavorable factors adversely affect the control performance of the hydraulic *** various control methods have been employed to improve the tracking precision of the dynamic system,optimizing and adjusting control gain to mitigate the hydraulic actuator model uncertainties remains *** study presents an adaptive back-stepping sliding mode controller(ABSMC)to enhance the trajectory tracking precision,where the virtual control law is constructed to replace the position *** adaptive control theory is introduced in back-stepping controller design to compensate for the model uncertainties and time-varying *** on Lyapunov theory,the finite-time convergence of the position tracking errors is ***,the effectiveness of the developed control scheme is conducted via extensive comparative experiments.

关键词： Hydraulic actuator back-stepping control adaptive control model uncertainties

Administration of Yeast Glucan on Immunity of Offspring in Turbot Scophthalmus maximus: A Trans-Generational Immune-Enhancing Effect

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Journal of Ocean University of China 2019年第4期18卷 997-1003页

作者： JIANG Chengyan wang Peng LIU Shousheng wang yanfeng LI Jun JI Guangdong College of Life Science and Technology Hong He University Mengzi 661100 China Laboratory for Evolution & Development Institute of Evolution & Marine Biodiversity and Department of Marine Biology Ocean University of China Qingdao 266003 China Center of Biotechnology R&D Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

β-glucan has been shown to increase immunity and survival in various juvenile and adult fish both in freshwater and marine aquaculture species as well as in marine fish larvae. However, information about the trans-generational immune-enhancing effects of β-glucan remains rather limited. Here we clearly show that dietary intake of β-glucan enhanced the levels of C3, Bf and lysozyme in the serum of turbot as well as in their eggs released. We also show that yeast glucan induced a significant increase in lysozyme activity in both the serum and eggs. Moreover, the embryos derived from yeast glucan-treated turbot were more resistant to bacterial challenge than control embryos. By contrast, the administration of yeast glucan on female turbots had little influence on the egg development and embryonic development. Collectively, these data indicate that yeast glucan can be safely used to promote the non-specific trans-generational immunity in offspring of turbot.

关键词： turbot Scophthalmus glucan trans-generational immunity

H_(∞) control for a networked Markovian jump system subject to data packet loss based on the observer

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IET Cyber-Systems and Robotics 2022年第1期4卷 3-14页

作者： yanfeng wang Xiaoyue Sun Ping He Zhigang Wu School of Mechanical and Electrical Engineering Suqian UniversitySuqianChina School of Engineering Huzhou UniversityHuzhouChina College of Engineering Huazhong Agricultural UniversityWuhanChina School of Energy and Mechanical Engineering Jiangxi University of Science and TechnologyNanchangChina

This study researches the H_(∞) control issue for a networked Markovian jump system with data packet loss occurring not only in the channel from sensor to controller but also in the channel from controller to actuator via an *** mathematical model for the closed‐loop networked Markovian jump system with data packet loss is *** necessary and sufficient conditions for the closed‐loop system to be stochastically stable are *** design approach of the controller and the minimal performance index of the external disturbance suppression are also given in the case that the transition possi-bilities of the system modes and the data packet loss are both partially ***,two numerical examples are used to illustrate the effectiveness of the proposed method.

关键词： data packet loss Markovian jump system networked control system observer

Synthesis of Magnetic Nickel Ferrite Microspheres and Their Microwave Absorbing Properties

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Chemical Research in Chinese Universities 2016年第4期32卷 678-681页

作者： JIAO Qingze wang yanfeng HAO Liang LI Hansheng ZHAO Yun School of Chemical Engineering and Environment Beijing Institute of Technology Beijing 100081 P. R. China School of Chemical Engineering and Materials Science Beijing Institute of Technology Zhuhai Zhuhai 519085 P. R. China

NiFe2O4 microspheres were synthesized using a solvothermal method. The morphologies and structures of NiFe2O4 micropheres were characterized via a field emission scanning electron microscope（FESEM）, a transmission electron microscope（TEM） and an X-ray diffractometer（XRD）. The NiFe2O4 microspheres were around 150--200 nm in diameter and assembled by nanoparticles. The magnetic and electromagnetic parameters were measured using a vibrating sample magnetometer and a vector network analyzer, respectively. The obtained products exhibited a saturation magnetization of 60.8 A.m2·kg-1 at room temperature. A minimum reflection loss（RL） of -27.8 dB was observed at 9.2 GHz with a thickness of 3.5 mm, and the effective absorption frequency（RL〈-10 dB） ranged from 8.2 GHz to 11.2 GHz, indicating the excellent microwave absorption performance of the NiFe2O4 microspheres in the X-band frequencies.

关键词： Nickel ferrite microsphere Magnetic property Microwave absorption property