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Chosen-Ciphertext Attack Secure Public-Key Encryption with Keyword Search

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computers, Materials & continua 2022年第10期73卷 69-85页

作者： Hyun Sook Rhee Samsung Electronics co.ltd. Suwon-si16677Korea

As the use of cloud storage for various services increases,the amount of private personal information along with data stored in the cloud storage is also *** remotely use the data stored on the cloud storage,the data to be stored needs to be encrypted for this ***“searchable encryption”is enable to search on the encrypted data without any decryption,it is one of convenient solutions for secure data management.A public key encryption with keyword search(for short,PEKS)is one of searchable *** et *** defined ind-CCA security for PEKS to enhance it’s security and proposed consistent ind-CCA secure PEKS based on the“robust”ANO-CCA secure identity-based encryption(IBE).In this paper,we propose two generic constructions of consistent ind-CCA secure PEKS combining(1)a hierarchical identity based encryption(for short,HIBE)and a signature scheme or(2)a HIBE,an encapsulation,and a message authentication code(for short,MAC)*** generic constructions identify that HIBE requires the security of a signature or a MAC as well as the weaker“ANO-CPA security(resp.,ind-CPA security)”of HIBE than“ANOCCA security(resp.,ind-CCA security)”of IBE required in for achieving ind-CCA secure(resp.,consistent)***,we prove that our generic constructions satisfy ind-CCA security and consistency under the security models.

关键词： Searchable encryption public-key encryption with keyword search chosen ciphertext security data privacy

Molecular Weight and Aggregation of Erwinia Gum in Aqueous Solutions

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Chemical Research in Chinese Universities 2000年第2期16卷 156-162页

作者： ZHANG Lina XU Xiaojuan ZHU RongPing Iijima Hideki Wuhan Univ Dept Chem Wuhan 430072 Peoples R China Natl Res Ctr Certified Reference Mat Beijing 100013 Peoples R China Asahi Chem ind co ltd Chem Technol Dept 4 Miyazaki 8828847 Japan

Erwinia(E) gum is composed of glucose, fucose, galactose and glucuronic acid. The weightaverage molecular weights M w, numberaverage molecular weights M n and intrinsic viscosities[η] of the four fractions and the unfractionated E gum in aqueous solutions at desired temperatures were studied by light scattering, membrane osmometry, size exclusion chromatography(SEC) and viscometry. The experimental results prove that E gum formed aggregates in the aqueous solution at 25 ℃ and the aggregates were broken gradually with increasing temperature. The dissociation of the aggregates of E gum in the aqueous solution started at 36 ℃, and was completed at around 90 ℃. The [η] values of E gum and its fractions are much higher than those of the conventional polymers with the similar molecular weights, and decrease with increasing NaCl concentration.

关键词： Erwinia gum Light scattering SEC Membrane osmometry Viscometry Molecular weight Aggregation

Simulating multiphase flow in a two-stage pusher centrifuge using computational fluid dynamics

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Frontiers of Chemical Science and Engineering 2012年第3期6卷 329-338页

作者： Chong PANG Wei TAN Endian SHA Yuanqing TAO Liyan LIU School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Zhejiang Qingji ind.co.ltd.Inc. Hangzhou 311401China

The design of two-stage pusher centrifuges have developed rapidly, but a good understanding of the theory behind their practice is a long-standing problem. To better understand centrifugal filter processes, the computational fluid dynamics （CFD） software program FLUENT has been used to model the three-dimensional geometry and to simulate multiphase flows based on Euler-Euler, moving mesh, dynamic mesh and porous media models. The simulation tangential velocities were a little smaller than those for rigid-body motion. In the stable flow region, the radial velocities were in good agreement with the theoretical data. Additionally, solid concentration distribution were obtained and also showed good agreement with the experimental data. These results show that this simulation method could be an effective tool to optimize the design of the two-stage pusher centrifuge.

关键词： two-stage pusher centrifuge multiphase flow,CFD dynamic mesh porous media

Texture development and grain boundary phase formation in Ce-and Ce-La-substituted Nd-Fe-B magnets during hot-deformation process

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Journal of Materials Science & Technology 2022年第31期126卷 71-79页

作者： Ga-Yeong Kim Tae-Hoon Kim Hee-Ryoung Cha Sang-hyub Lee Dong-Hwan Kim Yang-Do Kim Jung-Goo Lee Department of Magnetic Materials Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea R&D Center Star Group Ind.Co.Ltd.Daegu 42714Republic of Korea

In this study,the influence of Ce-and Ce-La-substitution for Nd in Nd-Fe-B magnets on their magnetic and microstructural changes in the course of the hot-deformation process was investigated to gain insight into further reducing the Nd content in fine-grained Nd-Fe-B hot-deformed *** found that the[001]texture and microstructure of the RE-rich grain boundary phases,which are the factors that de-termine the remanence and coercivity of hot-deformed magnets,were deteriorated by the Ce-and *** is because the volume fraction of the RE-rich liquid formed in the grain boundaries during the hot-press and hot-deformation decreased due to the Ce-and Ce-La-substitution,thereby in-creasing the friction between the 2:14:1 grains while the c-axes of grains were aligned by grain rotation and decreasing the RE concentration of grain boundary *** particular,the Ce-La-co-substitution further prevented the liquid formation within the grain boundaries of the magnets during hot-press and hot-deformation because the wettability of the RE-rich liquid on the 2:14:1 grains became poor when La was substituted for Nd in the 2:14:1 *** results indicate that there is room for further im-provement in both the remanence and coercivity of the Ce-and Ce-La-substituted magnets by intro-ducing additional liquid into the grain boundaries prior to hot-press and *** applying the Nd-Cu infiltration process to the melt-spun ribbons(intermediate infiltration,I-infiltration),both the remanence and coercivity of the Nd-saving(Nd 0.7 Ce 0.3)-Fe-B and(Nd 0.7 Ce 0.225 La 0.075)-Fe-B hot-deformed magnets were successfully improved.

关键词： Nd-Fe-B magnets Hot-deformation Nd-saving Ce-substitution La-substitution Infiltration

The Application and Research of parallel file system in electric power enterprise portal system

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The Application and Research of parallel file system in elec...

第25届中国控制与决策会议

作者： Zhang Jingxin Zhao Yongbin Yu Liangliang Liaoning Electric Power co. ltd

ISBN: (纸本)9781467355339

The shortcoming of original data storage is the main limit of increasing the access effect of the portal system. Therefore to adopt a reasonable and effective way of storage is the top emergency. Nowadays, to keep all the photos and attachments on a single storage cannot meet the requirements of the application. The paper solves the problem derived from the system’s failing to support multiple accesses, in the way of studying the shortcomings of the portal system storage and experiments about applications in real Internet. Adapting the loading way of parallel file in order to use the sources effectively. Generally, this essay is useful in the aspect of application of parallel file.

关键词： Enterprise Portal parallel file system

The Analysis And Improvement Of FGC Strategy On Five tandem cold Mill

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The Analysis And Improvement Of FGC Strategy On Five tandem ...

第25届中国控制与决策会议

作者： Xiao Zhiyong Baosteel Stainless Steel co.ltd

ISBN: (纸本)9781467355339

In order to shorten the off-gauge length between head and tail on welded seam during normal produce of five tandem cold mill in baosteel , it main analyze the main mode, the strategy of process parameters and the technical shortage about old FGC. According to the principle of metal mass flow equation, it made a new control principle and a new strategy of process parameters of FGC. After the application of new strategy to line, It is not only the transition more stable and the ratio of strip breakage lower, but also the length of off-gauge is shortened and the percent of pass of strip gauge is higher. It is useful for reference of FGC technical optimization to hot mill and similar mill as five tandem cold rolling mill.

关键词： five tandem cold rolling off-gauge at head and tail of strip parameter change strategy metal mass flow equation.

A Large-Scale Spatio-Temporal Multimodal Fusion Framework for Traffic Prediction

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BIG DATA MINING AND ANALYTICS 2024年第3期7卷 621-636页

作者： Zhou, Bodong Liu, Jiahui Cui, Songyi Zhao, Yaping Shanghai EchoBlend Internet Technol co ltd Tech Consulting Dept Shanghai 201111 Peoples R China Univ Hong Kong Dept Elect & Elect Engn Hong Kong 999077 Peoples R China Univ Hong Kong Dept Ind & Mfg Syst Engn Hong Kong 999077 Peoples R China

Traffic prediction is crucial for urban planning and transportation management, and deep learning techniques have emerged as effective tools for this task. While previous works have made advancements, they often overlook comprehensive analyses of spatio-temporal distributions and the integration of multimodal representations. Our research addresses these limitations by proposing a large-scale spatio-temporal multimodal fusion framework that enables accurate predictions based on location queries and seamlessly integrates various data sources. Specifically, we utilize convolutional Neural Networks (CNNs) for spatial information processing and a combination of Recurrent Neural Networks (RNNs) for final spatio-temporal traffic prediction. This framework not only effectively reveals its ability to integrate various modal data in the spatio-temporal hyperspace, but has also been successfully implemented in a real-world large-scale map, showcasing its practical importance in tackling urban traffic challenges. The findings presented in this work contribute to the advancement of traffic prediction methods, offering valuable insights for further research and application in addressing real-world transportation challenges.

关键词： Deep learning Recurrent neural networks Soft sensors Urban planning Transportation Prediction methods Information processing spatio-temporal traffic prediction multimodal fusion learning representation

Intelligent Decoupling in AGC-AFC System Based on CMAC Model

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Intelligent Decoupling in AGC-AFC System Based on CMAC Model

第25届中国控制与决策会议

作者： Jiaren Guo Xiting Wang Ying Xu Hang Li Shiguo Jiang Shandong gold mining (Laizhou) refinery co. Ltd.

ISBN: (纸本)9781467355339

Flatness and gauge are the most important factors in strip quality. Automatic gauge control （AGC） and automatic flatness control （AFC） are a coupled multivariable system, which holds down the quality of strip heavily. In this paper the dynamic mathematics model is established considering AGC and AFC as a whole system, designing intelligent-decoupling method based on CMAC model. The simulation shows that the intelligent decoupling method is able to eliminate the effect of the coupling in AGC-AFC system as quickly as possible, guarantee the stability of the system, at the same time the intelligent controller has good performances on adaptively tracking target and resisting disturbances.

关键词： AGC AFC CMAC Intelligent decoupling control

Research on Initial Alignment for Large Azimuth Misalignment Angle with SageHusa Adaptive Filtering

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Research on Initial Alignment for Large Azimuth Misalignment...

第25届中国控制与决策会议

作者： Cheng Zijian He Xiaofei Jiang Huan Li Dehui Beijing Aerospace Times Optical-electronic Technology co. Ltd

ISBN: (纸本)9781467355339

The azimuth was often a large angle because navigation accuracy of fiber-optic inertial navigation system is not high, and the filtering equations of initial alignment are non-linear. In order to improve the initial alignment accuracy of nonlinear models, a improved Sageusa adaptive Kalman filtering method is put forward , and applied to initial alignment of fiber-optic inertial navigation system. This paper establishes initial alignment nonlinear model of large azimuth misalignment angle, contributes the system noise statistics estimators, and uses improved Sageusa adaptive Kalman filtering to simulate for nonlinear error equations. The simulation results show that the improved Sageusa adaptive Kalman filtering could deal with nonlinear problems, improve the accuracy of initial alignment. Azimuth misalignment angle error can converge 13.353’ better than 48.539’ of EKF.

关键词： fiber-optic initial navigation system initial alignment SageHusa adaptive kalman filter nonlinear