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On the security of Homomorphic Encryption schemes with Restricted Decryption Oracles

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Journal of systems science & Complexity 2024年第5期37卷 2240-2261页

作者： ma Guangsheng LI Hongbo school of mathematics and Physics North China Electric Power UniversityBeijing 100096China Academy of mathematics and systems science Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of sciences Beijing 100049China

Fully homomorphic encryption(FHE)can be used for privacy-preserving aggregation of medical *** this typical application,the security against passive attacks has been well studied by Li and Micciancio(2021).In this paper,the authors further consider a“nearly passive”kind of attack,where the attacker may behave like a passive attacker in the view of the third-party *** capture the security against this hard-to-detect attack,the authors propose a new notion of IND-CPA^(rD)*** authors show that the standard LWE encryption and its related FHE schemes can not defend against IND-CPA^(rD)attack,even under a stricter rule limiting the content and number of queries made by the *** make the application of FHE schemes more secure,the authors discuss some possible modifications that may serve as countermeasures to IND-CPA^(rD)attack.

关键词： Homomorphic encryption privacy secure cloud computing security

Dynamic Modeling for Gas-Electricity Combined systems with Wind Power and its stability Control

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CsEE Journal of Power and Energy systems 2023年第6期9卷 2386-2393页

作者： Rui ma Pingping He Changsha University of science&Technology Changsha 410114China

The micro turbine(MT)is scheduled to address wind power uncertainties and thus lead to greater variations in the state of natural gas system(NGs).To meet this challenge,first,a dynamic model of a gas-electricity combined system with wind power is established,the dynamic model of the NGs is based on differential equations,so that it can easily connect with the MT model;and a droop control module is added to the Rowen's MT model,so that the improved model can adjust the output power according to the scheduling ***,a.s.a.ility control method based on the variable regulation ratio gas pressure regulator is proposed,the essence of this method is to reduce the variation of natural gas storage in the gas pipeline,so as to ensure the stability of *** simulation results show that the dynamic model is correct and the stability control method is effective.

关键词： Dynamic behaviors integrated energy system stability control method wind power

A review of recent advances in the effects of surface and interface properties on marine propellers

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Friction 2024年第2期12卷 185-214页

作者： manfu ZHU Liran ma state Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China

marine propellers are important propulsion devices for both surface ships and underwater *** severe environmental problems have required further performance enhancement for ***,traditional methods to improve propeller performances through geometrical and structural optimizations have been extensively investigated,while the underlying mechanisms of the effects of surface and interface properties on marine propellers are still far from being fully *** paper presented a comprehensive review of recent advances in the effects of surface and interface properties,such as surface roughness and surface wettability,on marine propellers with an emphasis on the significant improvements in both hydrodynamic and cavitation performances,hoping to arouse more in-depth investigations in the field of surface/interface science and technologies on marine propellers,and also promote the state-of-the-art technologies,such as superlubricity technology,into practical applications.

关键词： marine propellers hydrodynamics cavitation surface roughness surface wettability

Quantum Wolf Pack Evolutionary Algorithm of Weight Decision-making Based on Fuzzy Control

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Chinese Journal of Electronics 2022年第4期31卷 635-646页

作者： LU Na ma Long school of Economics and management Xi’an Aeronautical University

In the traditional quantum wolf pack algorithm, the wolf pack distribution is simplified, and the leader wolf is randomly selected. This leads to the problems that the development and exploration ability of the algorithm is weak and the rate of convergence is ***, a quantum wolf pack evolutionary algorithm of weight decision-making based on fuzzy control is proposed in this paper. First, to realize the diversification of wolf pack distribution and the regular selection of the leader wolf, a dual strategy method and sliding mode cross principle are adopted to optimize the selection of the quantum wolf pack initial position and the candidate leader wolf. second, a new non-linear convergence factor is adopted to improve the leader wolf’s search direction operator to enhance the local search capability of the algorithm. Meanwhile, a weighted decision-making strategy based on fuzzy control and the quantum evolution computation method is used to update the position of the wolf pack and enhance the optimization ability of the algorithm. Then, a functional analysis method is adopted to prove the convergence of the quantum wolf pack algorithm, thus realizing the feasibility of the algorithm’s global convergence. The performance of the quantum wolf pack algorithm of weighted decision-making based on fuzzy control was verified through six standard test functions. The optimization results are compared with the standard wolf pack algorithm and the quantum wolf pack algorithm. Results show that the improved algorithm had a faster rate of convergence, higher convergence precision,and stronger development and exploration ability.

关键词： Weight factor Fuzzy control Wolf pack evolutionary algorithm Quantum evolution computation

Nonlinear Inverse Relations of the Bell Polynomials via the Lagrange Inversion Formula (Ⅱ)

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Journal of systems science & Complexity 2023年第1期36卷 96-116页

作者： ma Xinrong WANG Jin Department of mathematics Soochow UniversitySuzhou 215006China Department of mathematics Zhejiang Normal UniversityJinhua 321004China

In this paper,by means of the classical Lagrange inversion formula,the authors establish a general nonlinear inverse relation as the solution to the problem proposed in the paper[***,Nonlinear inverse relations for the Bell polynomials via the Lagrange inversion formula,*** seq.,Vol.22(2019),Article 19.3.8].As applications of this inverse relation,the authors not only find a short proof of another nonlinear inverse relation due to Birmajer,et al.(2012),but also set up a few convolution identities concerning the Mina polynomials.

关键词： Bell polynomial convolution identity formal power series Lagrange inversion formula Mina polynomial nonlinear inverse relation recurrence relation

Application of Phase-Locked PIV Technique to the Measurements of Flow Field in a Turbine stage

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Journal of Thermal science 2020年第3期29卷 784-792页

作者： ZHANG Zhenyang ma Hongwei school of Energy and Power Engineering Beihang UniversityBeijing 100191China TELLHOW sCI-TECH CO. LTD.Nanchang 330096China National Key Laboratory of science and Technology on Aero-Engine Aero-thermodynamics Beihang UniversityBeijing 100191China

For the purpose of improving turbine efficiency,a detailed investigation of flow field near rim seal region in the main annulus is absolutely *** flow egressed from the seal gap penetrates the hub boundary layer and travels along with the secondary flow in the main *** propagation of the purge flow and its influence on the turbine performance are crucial and cannot be neglected in the aerodynamic and thermal *** addition,the interaction of vane wake and blade potential field also has a significant impact on the turbine stage *** this study,flow field between inlet guide vanes(IGV)and rotor blades was experimentally investigated at specific positions with the help of a two-dimensional particle image velocimetry(2-D PIV).A phase-locking technique was also employed to capture the images of flow field at different rotor blade *** acquired characterizes the impact of emergent purge flow on the flow structures within the main *** impacts of vane wake and blade potential field on the flow fields were analyzed through characterizations provided by the time-averaged field ***,flow fields at different main flow rates and under different seal gap widths were also presented and assessed.

关键词： flow field measurement PIV(particle image velocimetry) phase-locking technique turbine inter-stage

Developmental quantitative genetic analysis of body weights and morphological traits in the turbot, scophthalmus maximus

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Acta Oceanologica sinica 2015年第2期34卷 55-62页

作者： WANG Xin'an ma Aijun ma Deyou Yellow sea Fisheries Research Institute Chinese Academy of Fisheries Sciences/Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture/Qingdao Key Laboratory for Marine Fish Breeding and Biotechnology

In order to elucidate the genetic mechanism of growth traits in turbot during ontogeny, developmental genetic analysis of the body weights, total lengths, standard lengths and body heights of turbots was conducted by mixed genetic models with additive-dominance effects, based on complete diallel crosses with four different strains of scophthalmus maximus from Denmark, Norway, Britain, and France. Unconditional genetic analysis revealed that the unconditional additive effects for the four traits were more significant than unconditional dominance effects, meanwhile, the alternative expressions were also observed between the additive and dominant effects for body weights, total lengths and standard lengths. Conditional analysis showed that the developmental periods with active gene expression for body weights, total lengths, standard lengths and body heights were 15–18, 15 and 21–24, 15 and 24, and 21 and 27 months of age, respectively. The proportions of unconditional/conditional variances indicated that the narrow-sense heritabilities of body weights, total lengths and standard lengths were all increased systematically. The accumulative effects of genes controlling the four quantitative traits were mainly additive effects, suggesting that the selection is more efficient for the genetic improvement of turbots. The conditional genetic procedure is a useful tool to understand the expression of genes controlling developmental quantitative traits at a specific developmental period（t-1→t） during ontogeny. It is also important to determine the appropriate developmental period（t-1→t） for trait measurement in developmental quantitative genetic analysis in fish.

关键词： Turbot(scophthalmus maximus L.) growth developmental genetics genetic effect

Task-space Tracking Control of Robotic manipulator Via Intermittent Controller

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Journal of systems science & Complexity 2022年第6期35卷 2248-2262页

作者： ma Mihua CAI Jianping school of mathematics and statistics Minnan Normal UniversityZhangzhou 363000China

An intermittent controller for robotic manipulator in task space was developed in this *** task space,for given a desired time-varying trajectory,the robot end-effector can track the desired target under the designed intermittent *** from most of the existing works on control of robotic manipulator,the intermittent control for robotic manipulator is discussed in task space instead of joint ***,the desired trajectory can be time-varying and not limited to *** a direct application,the authors implemented the proposed controller on tracking of a two-link robotic manipulator in task *** simulations demonstrate the effectiveness and feasibility of the proposed intermittent control strategy.

关键词： Intermittent controller robotic manipulator task-space tracking

synthesis and Characterization of Mesoporous Alumina via a Reverse Precipitation Method

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Journal of materials science & Technology 2012年第6期28卷 572-576页

作者： Y.s.Wu J.ma F.Hu M.C.Li College of materials science and Engineering Shenyang University of TechnologyShenyang 110870China

Mesoporous aluminaΥ-AI203 with high specific surface area and large pore volume is prepared by using a facile reverse precipitation method from sodium aluminate and nitric acid. The effects of terminal pH value, aging time and thermal stability on the characterization of Υ-Al2Oa are studied by means of X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FTIR）, Brunauer-Emmett-Teller （BET） method and scanning electron microscopy （sEM）. The results show that Υ-A1203 with better properties can be obtained by changing the preparation parameters. High BET surface area of 340 m2/g can be obtained by calcining at 500℃ for 4 h with large pore volume of 0.90 cm3/g and average pore size of 7.6 nm. After calcining at 1000°, the surface area is still 86 m2//g and the pore volume is 0.37 cm31/g.

关键词： Mesoporous alumina Reverse precipitation Thermal stability