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6th International Conference on Internet Multimedia Computing and Service, ICIMCS 2014

作者： Chen, Zhikun Yang, Shuqiang He, Li Tan, Shuang Zhang, Lumin Yang, Huiyu Zhang, Ge Computer Department National University of Defense Technology Changsha Hunan China Beijing Aeronautics Engineering Technology Research Center Beijing China

ISBN: (纸本)9781450328104

NoSQL databases are famed for the characteristics of high scalability, high availability and high fault-tolerance. So NoSQL databases are used in a lot of applications, especially in the Internet Applications. The computing model of the NoSQL database is transferred fromdata close to computing to computing close to data. So the data partition strategy and fragment allocation strategy directly affect the load balance of the system. We can not play the advantages of the NoSQL database when the load of the system is unbalance. This paper will analyze the problem of fragment allocation strategy in NoSQL databases, and analyze the strategy how affecting the load balance of system. Then we will propose the load-aware fragment allocation strategy (LAFAS) to improve the load balance of the system. At last we will use some experiments to verify the effectiveness of LAFAS which is proposed in this paper. Copyright 2014 ACM.

关键词： Database systems

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LR-RRA-CCA secure functional encryption for randomized functionalities from trapdoor HPS and LAF

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Science China(Information Sciences) 2018年第5期61卷 291-305页

作者： Huige WANG Kefei CHEN Baodong QIN Ziyuan HU Department of Network Engineering Anhui Science and Technology University Department of Computer Science and Engineering Shanghai Jiao Tong University Department of Mathematics Hangzhou Normal University Westone Cryptologic Research Center National Engineering Laboratory for Wireless Security Xi'an University of Posts and Telecommunications State Key Laboratory of Cryptology

Original public-key encryption is viewed as a tool to encrypt point-to-point *** data is aimed at a particular user,where a sender encrypts a message x under a specified public key P *** this case,only the owner of the(unique)secret key corresponding to P K can decrypt the resulting ciphertext to recover the message ***,on some occasions,encryption is necessary to implement more fine-grained control of the encrypted *** example,the sender

关键词： LAF CCA RRA

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IMAGE QUALITY ASSESSMENT BASED ON CONTOUR AND REGION

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Journal of Computational Mathematics 2016年第6期34卷 705-722页

作者： Chen Huang Ming Jiang Tingting Jiang LMAM School of Mathematical Sciences Beijing International Center for Mathematical Research and Cooperative Medianet Innovation Center Peking University Beijing 100871 China NELVT National Engineering Laboratory for Video Technology School of Electronics Engineering and Computer Science and Cooperative Medianet Innovation Center Peking University Beijing 100871 China

Image Quality Assessment （IQA） is a fundamental problem in image processing. It is a common principle that human vision is hierarchical： we first perceive global structural information such as contours then focus on local regional details if necessary. Following this principle, we propose a novel framework for IQA by quantifying the degenerations of structural information and region content separately, and mapping both to obtain the objective score. The structural information can be obtained as contours by contour detec- tion techniques. Experiments are conducted to demonstrate its performance in comparison with multiple state-of-the-art methods on two large scale datasets.

关键词： Image quality assessment Contour detection Image segmentation.

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Charging scheduling design of mobile charging vehicle

Charging scheduling design of mobile charging vehicle

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2020 International Conference on computer engineering and Intelligent Control, ICCEIC 2020

作者： Duan, Ruru Xu, Chengze EVOC Intelligent Technology Co. Ltd. National Special Computer Engineering Technology Research Center Shenzhen Guangdong China

ISBN: (纸本)9781728185736

This paper proposes a mobile charging algorithm for mobile charging vehicles based on WRSNs, which uses network non-uniform clustering and low energy consumption path selection to perform reasonable charging scheduling for mobile charging vehicles. A comparative simulation experiment was carried out on MATLAB to evaluate the performance of the mobile charging algorithm. The results show that in a charging network with 150 nodes, the highest charging efficiency is about 73%, the lowest charging efficiency is about 65%, and the average achievable charging efficiency is 69%. Compared with the TSP algorithm, the network availability of the mobile charging algorithm is increased by about 26%, and the data transmission capacity is increased by about 37.5%. © 2020 IEEE.

关键词： Scheduling

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Valency, charge-transfer, and orbital-dependent correlation in bilayer nickelates Nd3Ni2O7

arXiv

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arXiv 2025年

作者： Takegami, Daisuke Okauchi, Takaki Morales, Edgar Abarca Fujinuma, Kouto Furo, Mizuki Yoshimura, Masato Tsuei, Ku-Ding Pan, Grace A. Segedin, Dan Ferenc Song, Qi Paik, Hanjong Brooks, Charles M. Mundy, Julia A. Mizokawa, Takashi Tjeng, Liu Hao Goodge, Berit H. Hariki, Atsushi Department of Applied Physics Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo169-8555 Japan Max Planck Institute for Chemical Physics of Solids Nöthnitzer Str. 40 Dresden01187 Germany Department of Physics and Electronics Osaka Metropolitan University 1-1 Gakuen-cho Nakaku Osaka Sakai599-8531 Japan National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu30076 Taiwan Department of Physics Harvard University Cambridge02138 United States Cornell University Ithaca14853 United States School of Electrical and Computer Engineering University of Oklahoma NormanOK73019 United States Center for Quantum Research and Technology University of Oklahoma NormanOK73019 United States John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge02138 United States

We examine the bulk electronic structure of Nd3Ni2O7 using Ni 2p core-level hard x-ray photoemission spectroscopy combined with density functional theory + dynamical mean-field theory. Our results reveal a large deviation of the Ni 3d occupation from the formal Ni2.5+ valency, highlighting the importance of the charge-transfer from oxygen ligands. We find that the dominant d8 configuration is accompanied by nearly equal contributions from d7 and d9 states, exhibiting an unusual valence state among Ni-based oxides. Finally, we discuss the Ni dx2−y2 and dz2 orbital-dependent hybridization, correlation and local spin dynamics. © 2025, CC BY-NC-ND.

关键词： X ray photoelectron spectroscopy

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Inferring scattering-type Scanning Near-Field Optical Microscopy Data from Atomic Force Microscopy Images

arXiv

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arXiv 2025年

作者： Stanciu, Stefan G. Anton, Stefan R. Tranca, Denis E. Stanciu, George A. Ionescu, Bogdan Zalevsky, Zeev Kusnetz, Binyamin Belhassen, Jeremy Karsenty, Avi Cincotti, Gabriella Center for Microscopy-Microanalysis and Information Processing National University of Science and Technology POLITEHNICA Bucharest 313 Splaiul Independentei 060042 Romania CAMPUS Research Institute National University of Science and Technology POLITEHNICA Bucharest 313 Splaiul Independentei 060042 Romania AI Multimedia Lab National University of Science and Technology POLITEHNICA Bucharest 313 Splaiul Independentei 060042 Romania Faculty of Engineering Institute of Nanotechnology and Advanced Materials Bar-Ilan University Ramat Gan5290002 Israel Dept. of Applied Physic/Electro-Optics Engineering Faculty of Engineering Jerusalem College of Technology Jerusalem9116001 Israel Nanotechnology Center for Research and Education Jerusalem College of Technology Jerusalem9116001 Israel Department of Civil Computer Science and Aeronautical Technologies Engineering University Roma Tre Rome Italy

Optical nanoscopy is crucial in life and materials sciences, revealing subtle cellular processes and nanomaterial properties. Scattering-type Scanning Near-field Optical Microscopy (s-SNOM) provides nanoscale resolution, relying on the interactions taking place between a laser beam, a sharp tip and the sample. The Atomic Force Microscope (AFM) is a fundamental part of an s-SNOM system, providing the necessary probe-sample feedback mechanisms for data acquisition. In this Letter, we demonstrate that s-SNOM data can be partially inferred from AFM images. We first show that a generative artificial intelligence (AI) model (pix2pix) can generate synthetic s-SNOM data from experimental AFM images. Second, we demonstrate that virtual s-SNOM data can be extrapolated from knowledge of the tip position and, consequently, from AFM signals. To this end, we introduce an analytical model that explains the mechanisms underlying AFM-to-s-SNOM image translation. These insights have the potential to be integrated into future physics-informed explainable AI models. The two proposed approaches generate pseudo s-SNOM data without direct optical measurements, significantly expanding access to optical nanoscopy through widely available AFM systems. This advancement holds great promise for reducing both time and costs associated with nanoscale imaging. © 2025, CC BY.

关键词： Near field scanning optical microscopy

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Mining World Indicators for Analyzing and Modeling the Development of Countries

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ACM/IMS Transactions on Data Science 2021年第4期2卷 1–27页

作者： Huang, Hong Chi, Mingyuan Song, Yu Jin, Hai The National Engineering Research Center for Big Data Technology and System Key Laboratory of Service Computing Technology and System Ministry of Education School of Computer Science and Technology Huazhong University of Science and Technology Wuhan430074 China

The world indicators released by the World Bank or other organizations usually give the basic public knowledge about the world. However, separate and static index lacks the complex interplay among different indicators and thus cannot help us have an overall understanding of the world. To this end, we study the world indicators from a different angle. Firstly, we discover that there exist correlations between indicators either from a static view or from a dynamic view. Moreover, taking the trade and diplomatic relationships into consideration, we construct a multi-relational network to depict the interactions between different countries, and propose a Multiple Relations to Vector (MR2vec) model to study world indicators from a network perspective. The experimental results show the changes of world indicators are predictable with the proposed model, and our proposed MR2vec has wide adaptability in predicting multi-relation networks. © 2022 Copyright held by the owner/author(s).

关键词： Data mining

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RP-SWSGD: Design of sliding window stochastic gradient descent method with user’s ratings pattern for recommender systems

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Multimedia Tools and Applications 2024年第14期83卷 41083-41120页

作者： Khan, Zeshan Aslam Raja, Hafiz Anis Chaudhary, Naveed Ishtiaq Iqbal, Sumbal Mehmood, Khizer Raja, Muhammad Asif Zahoor Department of Electrical and Computer Engineering International Islamic University Islamabad Pakistan Future Technology Research Center National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou64002 Taiwan

To offer relevant and useful recommendations, the crucial role of recommender systems in e-commerce industry is to predict the users’ concern for various items by estimating items’ attributes and users’ preferences. The reliability of a recommender system is usually assessed through accuracy and speed of relevant recommendations for a variety of items. The matrix factorization-based stochastic gradient descent (SGD) methods proposed by researchers lack memory needed to capture the ratings history hidden in the previous iterations. Recently, sliding window-based SGD strategies designed for Recommender systems and Hammerstein nonlinear systems gained attention due to the improved performance in terms of convergence speed and estimated accuracy. The memory impact with regard to the historical information enhances the performance of sliding window-based SGD techniques. However, sliding window-based methods are deficient in capturing the ratings history based on the users’ rating patterns. Hence utilizing the same window length for the set of observed ratings rated by users. Therefore, we propose an improved sliding window-based SGD strategy to acquire historical information of the ratings with respect to a user’s rating patterns for efficient matrix factorization of recommender systems. The proposed strategy performs significantly by accomplishing fast convergence speed and accuracy for window sizes greater than 1. The accuracy of the suggested technique is verified for two benchmark datasets such as ML-100 K and Film-Trust. However, the authenticity of the proposed method as compared to the standard counterpart (window size = 1) is confirmed through Root Mean Squared Error (RMSE) and Mean Absolute Error (MAE). The average improvements achieved by the proposed strategy in terms of RMSE and MAE over the baseline for ML-100 K dataset are 0.726% and 2.245% respectively. Whereas the proposed method accomplishes considerable average improvement of 7.89% and 9.41% for RMSE an

关键词： Recommender systems

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Composability Verification of Complex Systems Using Colored Petri Nets

Composability Verification of Complex Systems Using Colored ...

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2021 Winter Simulation Conference, WSC 2021

作者： Mahmood, Imran Askari, Syed Hassan Sarjoughian, Hessam S. Center for Research in Modeling Simulation School of Electrical Engineering and Computer Science National University of Sciences and Technology Islamabad Pakistan

ISBN: (纸本)9781665433112

The discipline of component-based modeling and simulation offers promising gains including reductions in development cost, time, and system complexity. This paradigm promotes the use and reuse of modular components for adequate development of complex simulations. Achieving effective and meaningful model reuse through the composition of components still remains a daunting challenge. 'Composability', an integral part of this challenge, is the capability to select and assemble model components in various combinations to satisfy specific user requirements. In this paper, we propose the use of Colored Petri Nets for component-oriented model development, model composition, and the verification of composed models using state-space analysis technique. We present a case study of an elevator model as a proof of concept. Our case study explains the proposed process of developing and composing CPN-based model components and verifying the composed model using state-space analysis. © 2021 IEEE.

关键词： Petri nets

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Fruit Recognition Through Active Grasping of Two-Fingered Gripper Using a Soft Skin Sensor

Fruit Recognition Through Active Grasping of Two-Fingered Gr...

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2023 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications, ICRAMET 2023

作者： Mahendra, Oka Arifin, Muhammad Pratama, Rian Putra Munandar, Aris Baskoro, Catur Hilman A.H.B. Yulianti, Lista Eka Sakti, Indra Muhtadin Research Center for Smart Mechatronics National Research and Innovation Agency Bandung Indonesia Research Center for Appropriate Technology National Research and Innovation Agency Subang Indonesia Research Center for Electronics National Research and Innovation Agency Serpong Indonesia Sepuluh Nopember Institute of Technology Department of Computer Engineering Surabaya Indonesia

ISBN: (纸本)9798350343892

Recognizing the fruit is a critical function to achieve for an autonomous harvesting system. Since fruit commonly grows in complex environments, it is challenging for the vision system to accurately identify the fruit. Humans, on the other hand, can easily recognize fruits by using their hands only. This paper proposes a method for fruit recognition based on active grasping with two-fingered grippers equipped with a soft skin sensor. The soft skin sensor has a soft silicone that is attached to the fingertip gripper. This sensor provides a 3-axis in normal and shear force based on a hall effect sensor. Active grasping by squeezing was implemented to sense and record time-series data of fruit properties. The evaluation was performed using several machine learning classification methods, such as Random Forest, Support Vector Machines (SVM), and K-Neighbors. The gripper can recognize fruit types with 88% accuracy using the Random Forest classifier. These results confirm the gripper's effective fruit recognition ability using active grasping to mimic human hand capabilities. © 2023 IEEE.

关键词： Fruits

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