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A Verifiable Trust-Based CP-ABE Access Control Scheme for Cloud-Assisted Renewable Energy Systems

Computers, Materials & Continua 2025年第1期82卷 1211-1232页

作者： Jiyu Zhang Kehe Wu Ruomeng Yan Zheng Tian Yizhen Sun Yuxi Wu Yaogong Guo Department of Control and Computer Engineering North China Electric Power UniversityBeijing102206China State Grid Information&Communication Company of Hunan Electric Power corporation Changsha410118China State Grid Hunan Electric Power corporation Chenzhou Power Supply branch Chenzhou423000China

Renewable Energy Systems(RES)provide a sustainable solution to climate warming and environmental pollution by enhancing stability and reliability through status acquisition and analysis on cloud platforms and intelligent processing on edge servers(ES).However,securely distributing encrypted data stored in the cloud to terminals that meet decryption requirements has become a prominent research ***,managing attributes,including addition,deletion,and modification,is a crucial issue in the access control scheme for *** address these security concerns,a trust-based ciphertext-policy attribute-based encryption(CP-ABE)device access control scheme is proposed for RES(TB-CP-ABE).This scheme effectivelymanages the distribution and control of encrypted data on the cloud through robust attribute key *** introducing trust management mechanisms and outsourced decryption technology,the ES system can effectively assess and manage the trust worthiness of terminal devices,ensuring that only trusted devices can participate in data exchange and access sensitive ***,the ES system dynamically evaluates trust scores to set decryption trust thresholds,thereby regulating device data access permissions and enhancing the system’s *** validate the security of the proposed TB-CP-ABE against chosen plaintext attacks,a comprehensive formal security analysis is conducted using the widely accepted random oraclemodel under the decisional q-Bilinear Diffie-Hellman Exponent(q-BDHE)***,comparative analysis with other schemes demonstrates that the TB-CP-ABE scheme cuts energy/communication costs by 43%,and scaleswell with rising terminals,maintaining average latency below 50ms,ensuring real-time service *** proposed scheme not only provides newinsights for the secure management of RES but also lays a foundation for future secure energy solutions.

关键词： Access control renewable energy systems(RES) ciphertext-policy attribute-based encryption(CP-ABE) security

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Mass organic matter accumulation induced by rapid redox variations in lakes:Evidence from the Miaoxi area,Bohai Bay Basin,China

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Journal of Palaeogeography 2025年第01期14卷 291-313页

作者： Peng Sun Hai-Feng Yang Fei-Long Wang Jun-Pei Yue Yan-Fei Gao You-Jun Tang School of Petroleum Engineering Yangtze University Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of Education Yangtze University Tianjin branch of China National Offshore Oil corporation College of Resource and Environment Yangtze University

The Member 4 of the Paleogene Shahejie Formation(Es4) in the Bohai Bay Basin is interspersed with a set of high-quality source rocks typified as intercalation of red and black mudstones. A large amount of petroleum(crude oil) originates from these source rocks. The Paleocene-Eocene Thermal Maximum(PETM)event occurred during the deposition of Es4 in the Bohai Bay Basin, and the organic matter enrichment model under this event is worth further investigation due to its relationship with and influence on petroleum accumulations. Well LK25-A, as the first oil exploration well drilled into the Es4 in Miaoxi area, serves as a valuable case to study organic matter accumulation. In this study, we integrate total organic carbon(TOC),Rock-Eval pyrolysis, microscopic observation, vitrinite reflectance(VRo), elemental analysis, and gas chromatography-mass spectrometry(GC-MS) to evaluate the hydrocarbon generation potential, organic matter types, thermal maturity, and sedimentary environment of the Es4 in Miaoxi area. The analysis of maceral and rock pyrolysis data reveals that Type I and Type II organic matter make up the majority of Paleogene mudstones in this region. The TOC and rock pyrolysis data show that mudstones in this area have high organic matter abundance and oil-generation potential. The measured vitrinite reflectance distribution of mudstone samples, which ranges from 0.3% to 0.74%, demonstrates that the Paleogene strata are at the immature to mature stage, and the samples from this area contain a sizable amount of bituminite and mineralbituminous groundmass. The analysis of biomarkers in the mudstone samples indicates that most of the mudstones in this area are in lacustrine and brackish-hypersaline lacustrine environment under a reducing condition, and some of the red mudstones in the Es4 are formed under a suboxic condition. Based on the size and morphology of the pyrite framboid, the redox conditions of the water mass during deposition or diagenesis are further

关键词： Hydrocarbon generation potential Biomarkers Optical microscopy Pyrite framboid Elemental geochemistry Red–black beds

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Detection using mask adaptive transformers in unmanned aerial vehicle imagery

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Optoelectronics Letters 2025年第2期21卷 113-120页

作者： YE Huibiao FAN Weiming GUO Yuping WANG Xuna ZHOU Dalin China Telecommunication corporation Zhejiang branch Hangzhou 310020China Innovation Center for Smart Medical Technologies&Devices Binjiang Institute of Zhejiang UniversityHangzhou 100059China School of Computing University of PortsmouthPortsmouthPO13HEUK

Drone photography is an essential building block of intelligent transportation,enabling wide-ranging monitoring,precise positioning,and rapid ***,the high computational cost of transformer-based methods in object detection tasks hinders real-time result transmission in drone target detection ***,we propose mask adaptive transformer (MAT) tailored for such ***,we introduce a structure that supports collaborative token sparsification in support windows,enhancing fault tolerance and reducing computational *** structure comprises two modules:a binary mask strategy and adaptive window self-attention (A-WSA).The binary mask strategy focuses on significant objects in various complex *** A-WSA mechanism is employed to self-attend for balance perfomance and computational cost to select objects and isolate all contextual *** experiments on the challenging CarPK and VisDrone datasets demonstrate the effectiveness and superiority of the proposed ***,it achieves a mean average precision (mAP@0.5) improvement of 1.25%over car detector based on you only look once version 5 (CD-YOLOv5) on the CarPK dataset and a 3.75%average precision(AP@0.5) improvement over cascaded zoom-in detector (CZ Det) on the VisDrone dataset.

关键词： token mask imagery

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Enhanced exergy cost optimization of operating conditions in FCCU main fractionator

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Chinese Journal of Chemical Engineering 2018年第8期26卷 1750-1757页

作者： Chonglin Zhong Yi Zheng Shenghu Xu Shaoyuan Li Department of Automation Shanghai Jiao Tong UniversityKey Laboratory of System Control and Information ProcessingMinistry of EducationShanghai 200240China sinopecjiujiang branch corporation Jiufiang 332004China

Exergy indicates the maximal energy that can do work effectively. Different from optimization of product quality or calculation of generic energy conservation in most previous studies, the application of exergy analysis and exergy cost optimization in petrochemical industry is of great economic and environmental significance. Based on the main fractionator in Jiujiang Petrochemical Complex No. 2 FCCU, an enhanced exergy cost optimization under different operating conditions by adjusting set points of temperature and valves opening degree for flow control is studied in this paper in order to reduce exergy cost and improve the quality of energy. A steadystate optimization algorithm to enhance exergy availability and an objective function comprehensively considering exergy loss are proposed. On the basis of ensuring the quality of petroleum products, the economic benefits can be improved by optimizing the controllable variables due to the fact that exergy cost is decreased.

关键词： Exergy Optimization of operating conditions Fractionator FCCU Exergy Cost

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Detection in Optical Remote Sensing Images of Transmission Tower Based on Oriented Object Detection

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CSEE Journal of Power and Energy Systems 2025年第1期11卷 217-226页

作者： Yuanpeng Tan Fei Jiao Wenhao Mo Haiying Liu Xiaojing Bai Jiaxiu Ma China Electric Power Research Institute Beijing 100192China China Electric Power Research Institute and North China Electric Power University Beijing100192China China Electric Power Research Institute and State Grid corporation of China Information and Communication branch Beijing100192China

Transmission towers play a crucial role in overhead transmission line systems and are the key target of transmission line *** the help of remote sensing technology,transmission towers can be effectively detected in wide areas at reasonable costs and in a relatively short time ***,it is difficult to identify the type of transmission towers in optical remote sensing images due to detail degradation caused by long-distance and high-altitude *** paper proposes a transmission tower detection method in optical remote sensing images using an oriented object detector and object and shadow joint *** enrich the information,the transmission towers and their shadows are jointly detected through a CenterNet detector with an orientation prediction *** improve the detection accuracy of difficult objects,attention and deformable convolutional network modules are introduced to the backbone and orientation prediction branches,*** the orientation and the aspect ratio of the objects and shadows,a focal loss function with an aspect ratio is employed to further improve the *** and shadow joint detection are separately realized through the one-box and multi-box detection strategies.A transmission tower dataset RSITT labeled with horizontal and oriented boxes is *** conducted on the RSITT dataset have demonstrated that the detection accuracy and recall rate of the proposed joint detection algorithm reached 73.2%and 95.2%.

关键词： Oriented object detection remote sensing image transmission projection transmission tower detection

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Doppler Rate Estimation for OTFS via Large-scale Antenna Array

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ZTE Communications 2025年

作者： SHAN Yaru WANG Fanggang HAO Yaxing HUA Jian XIN Yu Beijing Jiaotong University ZTE corporation

Orthogonal time frequency space (OTFS) can resist the Doppler effect and guarantee reliable communication in high-speed scenarios. However， the existence of the Doppler rate caused by the acceleration between the transceivers deteriorates the performance of the OTFS. So far， the impact of the Doppler rate on OTFS systems has not been addressed. In this paper， we first introduce the Doppler rate in the OTFS system and derive the delay-Doppler domain input-output relation. In addition， the impact of the Doppler rate on the effective delay-Doppler domain channel is characterized by utilizing the first mean value theorem for definite integrals to avoid complicated integrals. To mitigate the effect of the Doppler rate， a large-scale antenna array is arranged at the receiver to separate each path of the multi-path channel through a high-resolution spatial matched filter beamformer. Next， the Doppler rate estimation scheme for an arbitrary order Doppler rate is proposed based on the successive interference cancellation pattern and the maximization of the spectrum of the ratio of high-order moments between the received samples in the identified branch and the transmitted samples. Finally， the estimation accuracy of the Doppler rate and the error performance of the proposed transceiver are validated by the numerical results.

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Operation and Optimization of Residue Hydrotreating Unit Using New Catalyst System

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China Petroleum Processing & Petrochemical Technology 2012年第3期14卷 50-58页

作者： Yin Zhaolin Sinopec corporation Maoming branch Company

This article has summarized the optimized measures relating to the loading of catalyst,and the sixth operating cycle of the residue hydrotreating unit at SINOPEC's Maoming branch Company,and made a detailed comparison on the impurities removal rate,hydrogen consumption and energy consumption of the sixth operating cycle with those achieved by the previous five *** results have revealed that the second-generation RHT series novel residue hydrotreating catalysts featured high activity,good stability,and long operating cycle and could remarkably reduce the hydrogen consumption and energy consumption of process *** hydrotreated AR product,having low Conradson carbon residue,low sulfur content,low metal content,high content of saturated hydrocarbons,and low content of asphaltenes and resins,is an excellent FCC *** from their overall property the second-generation RHT series of residue hydrotreating catalysts used in the sixth operating cycle have commanded a leading position among other catalysts used in previous operating cycles.

关键词： residue hydrotreating catalyst performance of unit optimization

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Novel Approach to Minimize the Memory Requirements of Frequent Subgraph Mining Techniques

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Chinese Journal of Electronics 2021年第2期30卷 258-267页

作者： B?LG?N Turgay Tugay O?UZ Murat Department of Computer Engineering Bursa Technical University Microsoft corporation Turkey branch

Frequent subgraph mining(FSM) is a subset of the graph mining domain that is extensively used for graph classification and clustering. Over the past decade, many efficient FSM algorithms have been developed with improvements generally focused on reducing the time complexity by changing the algorithm structure or using parallel programming techniques. FSM algorithms also require high memory consumption, which is another problem that should be solved. In this paper, we propose a new approach called Predictive dynamic sized structure packing(PDSSP) to minimize the memory needs of FSM algorithms. Our approach redesigns the internal data structures of FSM algorithms without making algorithmic modifications. PDSSP offers two contributions. The first is the Dynamic Sized Integer Type, a newly designed unsigned integer data type, and the second is a data structure packing technique to change the behavior of the compiler. We examined the effectiveness and efficiency of the PDSSP approach by experimentally embedding it into two state-of-the-art algorithms, g Span and *** compared our implementations to the performance of the originals. Nearly all results show that our proposed implementation consumes less memory at each support level, suggesting that PDSSP extensions could save memory, with peak memory usage decreasing up to 38% depending on the dataset.

关键词： data structures algorithmic modifications high memory consumption graph mining domain Dynamic Sized Integer Type Predictive dynamic sized structure packing internal data structures graph classification parallel programming peak memory usage memory requirements PDSSP extensions finite state machines graph theory PDSSP approach algorithm structure newly designed unsigned integer data type data mining data structure packing technique efficient FSM algorithms clustering frequent subgraph mining techniques

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Velocity model and time-depth conversion for the northwestern South China Sea deepwater areas

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Acta Oceanologica Sinica 2015年第4期34卷 56-61页

作者： LIU Aiqun CHEN Dianyuan LI Wentuo FAN Caiwei HE Jianwei Zhanjiang branch of China National Offshore Oil corporation Limited

There are rich natural gas resources in the northwestern South China Sea deepwater areas, with poor degree of exploration. Because of the unique tectonic, sedimentary background of the region, velocity model building and time-depth conversion have been an important and difficult problem for a long time. Recent researches in this direction have revealed three major problems for deepwater areas, i.e., the way to determine error correction for drilling velocity, the optimization of velocity modeling, and the understanding and analysis of velocity variations in the slope areas. The present contribution proposes technical solutions to the problems：（1） velocity correction version can be established by analyzing the geology, reservoir, water depths and velocity spectrum characteristics;（2） a unified method can be adopted to analyze the velocity variation patterns in drilled pale structural positions;and （3） across-layer velocity is analyzed to establish the velocity model individually for each of the layers. Such a solution is applicable, as shown in an example from the northwestern South China Sea deepwater areas, in which an improved prediction precision is obtained.

关键词： time-depth conversion velocity modeling deepwater areas continental slope South China Sea

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Geology and hydrocarbon accumulations in the deepwater of the northwestern South China Sea——with focus on natural gas

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Acta Oceanologica Sinica 2015年第10期34卷 57-70页

作者： WANG Zhenfeng SUN Zhipeng ZHANG Daojun ZHU Jitian LI Xushen HUANG Baojia GUO Minggang JIANG Rufeng Zhanjiang branch of China National Offshore Oil corporation(CNOOC) Limited

The deepwater of the northwestern South China Sea is located in the central to southern parts of the Qiongdongnan Basin(QDN Basin),which is a key site for hydrocarbon exploration in recent *** this study,the authors did a comprehensive analysis of gravity-magnetic data,extensive 3D seismic survey,cores and cuttings,paleontology and geochemical indexes,proposed the mechanism of natural gas origin,identified different oil and gas systems,and established the model of hydrocarbon accumulations in the deep-water *** basin tectonic simulation indicates that the evolution of QDN Basin was controlled by multiple-phased tectonic movements,such as Indochina-Eurasian Plate collision,Tibetan Uplift,Red River faulting and the expansion of the South China Sea which is characterized by Paleogene rifting,Neogene depression,and Eocene intensive faulting and lacustrine *** drilling results show that this region is dominated by marineterrestrial transitional and neritic-bathyal facies from the early *** Yacheng Formation of the early Oligocene is rich in organic matter and a main gas-source *** to the geological-geochemical data from the latest drilling wells,Lingshui,Baodao,Changchang Sags have good hydrocarbon-generating potentials,where two plays from the Paleogene and Neogene reservoirs were *** reservoirs occur in central canyon structural-lithologic trap zone,Changchang marginal trap zone and southern fault terrace of Baodao *** them,the central canyon trap zone has a great potential for exploration because the various reservoirforming elements are well developed,i.e.,good coal-measure source rocks,sufficient reservoirs from the Neogene turbidity sandstone and submarine fan,faults connecting source rock and reservoirs,effective vertical migration,late stage aggregation and favorable structural–lithological composite *** study results provide an important scientific basis for hydrocarbon exploration in this re

关键词： South China Sea deepwater natural gas petroleum system central canyon reservoir-forming conditions Qiongdongnan Basin

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