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应用完备集合固有时间尺度分解和混合差分进化和粒子群算法优化的最小二乘支持向量机对柴油机进行故障诊断 Article
俊红 张,昱 刘
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 2, Pages 272-286 doi: 10.1631/FITEE.1500337
Distresses and Countermeasures of Highway Subgrade in Plateau Permafrost Regions
Wang Shuangjie,Jin Long,Mu Ke,Zhu Dongpeng,Chen Donggen and Dong Yuanhong
Strategic Study of CAE 2017, Volume 19, Issue 6, Pages 140-146 doi: 10.15302/J-SSCAE-2017.06.020
This study collects the maintenance history, reconstruction material, and disease data of the Qinghai–Tibet Highway (QTH) over the past 60 years. The QTH is then divided into a stable region, a basically stable region, an unstable region, and a highly unstable region according to the road disease rate. Subsequently, 134 km typical disease sections are selected, and the relations between the road diseases and the mean annual ground temperature (MAGT), permafrost degradation rate, and ice content are studied based on the survey data. The average road service life is also determined. Newly developed diseases and their temporal effect are analyzed using the treatment measure. Furthermore, new stabilizing technologies adaptive to large-scale permafrost subgrade (e.g., distributed ventilation subgrade, unidirectional heat conduction board subgrade, and integrated pavement-subgrade heat drainage structure) are introduced. The results show that the MAGT, degradation rate of permafrost tables, and ice content are negatively related to the road service life. In all kinds of treatment measures, thermosyphon, crushed-rock, insulation board, and ventilation duct plus flag and block stone have a higher effective rate in heat prevention compared to other measures.
Keywords: permafrost temporal effect subgrade distress field investigation large-scale subgrade stabilizing technology
Block coordinate descent with time perturbation for nonconvex nonsmooth problems in real-world studies Research Article
Rui Liu, Wei-chu Sun, Tao Hou, Chun-hong Hu, Lin-bo Qiao,liuruirui@csu.edu.cn,smsysun@foxmail.com,houtao@csu.edu.cn,huchunhong@csu.edu.cn,qiao.linbo@nudt.edu.cn
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 10, Pages 1390-1403 doi: 10.1631/FITEE.1900341
Keywords: 收敛分析;异步块坐标下降法;时间扰动;非凸非平滑优化;真实世界研究
Calculation and research on deepwater drilling riser flexural equation and natural frequency
Jiang Wei
Strategic Study of CAE 2011, Volume 13, Issue 5, Pages 66-73
Flexural equation was established in this paper, which was based on application of deepwater drilling riser and Ritz methods in elastoplastic mechanics. Axial tension, inclination angle, lateral gravity components and axial gravity components were considered. Therefore, simple calculation method for natural frequency of drilling riser was achieved. Free-hinged beam was taken as constraint condition of flexural equation combined with drilling string real conditions, which made research approach practical work more. Purpose of research was to provide reasonable design and selection for deepwater drilling riser, and provide a more efficient and applied method, which would show guiding significance for deepwater drilling operation.
Keywords: deepwater drilling drilling riser flexural equation natural frequency shape function
Hui Liu, Rui Yang, Zhu Duan, Haiping Wu
Engineering 2021, Volume 7, Issue 12, Pages 1751-1765 doi: 10.1016/j.eng.2020.10.023
Dissolved oxygen (DO) is an important indicator of aquaculture, and its accurate forecasting can effectively improve the quality of aquatic products. In this paper, a new DO hybrid forecasting model is proposed that includes three stages: multi-factor analysis, adaptive decomposition, and an optimization-based ensemble. First, considering the complex factors affecting DO, the grey relational (GR) degree method is used to screen out the environmental factors most closely related to DO. The consideration of multiple factors makes model fusion more effective. Second, the series of DO, water temperature, salinity, and oxygen saturation are decomposed adaptively into sub-series by means of the empirical wavelet transform (EWT) method. Then, five benchmark models are utilized to forecast the sub-series of EWT decomposition. The ensemble weights of these five sub-forecasting models are calculated by particle swarm optimization and gravitational search algorithm (PSOGSA). Finally, a multi-factor ensemble model for DO is obtained by weighted allocation. The performance of the proposed model is verified by time-series data collected by the pacific islands ocean observing system (PacIOOS) from the WQB04 station at Hilo. The evaluation indicators involved in the experiment include the nash-sutcliffe efficiency (NSE), kling-gupta efficiency (KGE), mean absolute percent error (MAPE), standard deviation of error (SDE), and coefficient of determination (R2). Example analysis demonstrates that: ① the proposed model can obtain excellent DO forecasting results; ② the proposed model is superior to other comparison models; and ③ the forecasting model can be used to analyze the trend of DO and enable managers to make better management decisions.
Keywords: Dissolved oxygen concentrations forecasting Time-series multi-step forecasting Multi-factor analysis Empirical wavelet transform decomposition Multi-model optimization ensemble
Stability of Boolean networks with state-dependent random impulses
Ya-wen Shen, Yu-qian Guo, Wei-hua Gui,shenyawen@csu.edu.cn,gyuqian@csu.edu.cn,gwh@csu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2, Pages 141-286 doi: 10.1631/FITEE.1900454
Keywords: Boolean network with impulses Forward completeness Finite-time stability with probability one Asymptotical stability in distribution
Incomplete Fuzzy Information System
Yang Xibei,Yang Jingyu,Wu Chen,Fu Fan
Strategic Study of CAE 2006, Volume 8, Issue 7, Pages 47-53
In this paper, incomplete fuzzy information system is studied. In order to deal with it by rough set theory, fuzzy compatible relation and fuzzy rough approximation are defined by logic function. Furthermore, fuzzy covering on universe is proposed, three different operations on the coverings are formed and then some significant results are gained. Besides, with the two new definitions of fuzzy rough entropies, uncertain factors could be effectively measured, some important relationships between the varieties of uncertain factors and the strength of those entropies are discussed carefully. Finally, knowledge dependency in rough set theory is transformed to fuzzy knowledge dependency in the incomplete fuzzy information system. A new method for measuring the strength of partial fuzzy knowledge dependency is proposed. Some immediate theorems are proved.
Keywords: incomplete fuzzy information system fuzzy compatible relation fuzzy rough set fuzzy covering fuzzy rough entropy fuzzy knowledge dependency
A distributed EEMDN-SABiGRU model on Spark for passenger hotspot prediction
夏大文,耿建,黄瑞曦,申冰琪,胡杨,李艳涛,李华青
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9, Pages 1316-1331 doi: 10.1631/FITEE.2200621
Keywords: Passenger hotspot prediction Ensemble empirical mode decomposition (EEMD) Spatial attention mechanism Bi-directional gated recurrent unit (BiGRU) GPS trajectory Spark
Jinghai Li
Engineering 2016, Volume 2, Issue 3, Pages 276-285 doi: 10.1016/J.ENG.2016.03.001
Synchronization transition of a modular neural network containing subnetworks of different scales Research Article
Weifang HUANG, Lijian YANG, Xuan ZHAN, Ziying FU, Ya JIA,jiay@ccnu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 10, Pages 1458-1470 doi: 10.1631/FITEE.2300008
Keywords: Hodgkin– Huxley neuron Modular neural network Subnetwork Synchronization Transmission delay
Faster fog-aided private set intersectionwith integrity preserving None
Qiang WANG, Fu-cai ZHOU, Tie-min MA, Zi-feng XU
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 12, Pages 1558-1568 doi: 10.1631/FITEE.1800518
Private set intersection (PSI) allows two parties to compute the intersection of their private sets while revealing nothing except the intersection. With the development of fog computing, the need has arisen to delegate PSI on outsourced datasets to the fog. However, the existing PSI schemes are based on either fully homomorphic encryption (FHE) or pairing computation. To the best of our knowledge, FHE and pairing operations consume a huge amount of computational resource. It is therefore an untenable scenario for resource-limited clients to carry out these operations. Furthermore, these PSI schemes cannot be applied to fog computing due to some inherent problems such as unacceptable latency and lack of mobility support. To resolve this problem, we first propose a novel primitive called “faster fog-aided private set intersection with integrity preserving”, where the fog conducts delegated intersection operations over encrypted data without the decryption capacity. One of our technical highlights is to reduce the computation cost greatly by eliminating the FHE and pairing computation. Then we present a concrete construction and prove its security required under some cryptographic assumptions. Finally, we make a detailed theoretical analysis and simulation, and compare the results with those of the state-of-the-art schemes in two respects: communication overhead and computation overhead. The theoretical analysis and simulation show that our scheme is more efficient and practical.
Keywords: Private set intersection Fog computing Verifiable Data privacy
Studies on the Inhibition of Impurities in Caustic Decomposition of Tungsten Concentrates
Li Honggui,Li Yunjiao,Sun Peimei,Liu Maosheng
Strategic Study of CAE 2000, Volume 2, Issue 3, Pages 59-61
The Inhibition of impurities of As, P, Si and Sn in the caustic decomposition of tungsten concentrates was studied. It indicated that in the presence of scheelite (CaWO4) and Ca(OH)2, during caustic decomposition of sdheelite with NaOH, impurities, such as As, P, Si, will be more completely inhibited in the cake in the forms of NaCaAsO4, Ca3(AsO4)2, Ca3(PO4)2,Ca5(PO4)3(OH),CaSO3 and CaSnO3. It has been proved in laboratory experiment and industrial practice that the content of As and Si in the Na2WO4 solution from caustic decomposition of scheelite and wolframite mixed concentrates is only 20%〜30% of that from caus-tic decomposition of wolframite concentrates with the same contents of WO3 and impurities.
Keywords: metallurgy of tungsten caustic decomposition inhibition of impurities
The Realization of Time-Triggered Control Area Network
Lü Weijie,,Liu Luyuan,Wang Yixin
Strategic Study of CAE 2005, Volume 7, Issue 9, Pages 40-43
The time-triggered architecture for CAN is analyzed. The implementation issue of time- triggered architecture based on 8052 single-chip processor and CAN controller SJA1000 is designed. The maximum number of transmission messages in basic cycle is given. And the scheduling capability is analyzed. The experiment is based on the automotive engine management, the result proves that using time-triggered architecture can not only manage the message transmission but also improve the bandwidth utilization.
Keywords: time-triggered time synchronization CANbus distributed control systems
Noise Reduction of Vibration Signal of Cyclic Machine Based on the EMD
Yang Jianwen,Jia Minping,Xu Feiyun,Hu Jianzhong
Strategic Study of CAE 2005, Volume 7, Issue 8, Pages 66-69
The filtering property of empirical mode decomposition is analyzed in the paper. Aimed at the low signal/noise ratio and non stationary feature of vibration signal of cyclic machine, EMD is introduced to the noise reduction of vibration signal and the useful signal is given prominence efficiently, which offers the more efficient foundation to monitor on line and fault diagnosis of cyclic machine. By the simulation and application, it shows that EMD is very useful in reducing noise and provides new means of vibration signal analyzing.
Keywords: fault diagnosis empirical mode decomposition cyclic machine filter
Cascading decomposition of Boolean control networks: a graph-theoreticalmethod Research Articles
Yi-feng LI, Jian-dong ZHU
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 2, Pages 304-315 doi: 10.1631/FITEE.1900422
Keywords: Boolean control networks Semi-tensor product Cascading decomposition Graphic condition
Title Author Date Type Operation
Distresses and Countermeasures of Highway Subgrade in Plateau Permafrost Regions
Wang Shuangjie,Jin Long,Mu Ke,Zhu Dongpeng,Chen Donggen and Dong Yuanhong
Journal Article
Block coordinate descent with time perturbation for nonconvex nonsmooth problems in real-world studies
Rui Liu, Wei-chu Sun, Tao Hou, Chun-hong Hu, Lin-bo Qiao,liuruirui@csu.edu.cn,smsysun@foxmail.com,houtao@csu.edu.cn,huchunhong@csu.edu.cn,qiao.linbo@nudt.edu.cn
Journal Article
Calculation and research on deepwater drilling riser flexural equation and natural frequency
Jiang Wei
Journal Article
A Hybrid Neural Network Model for Marine Dissolved Oxygen Concentrations Time-Series Forecasting Based on Multi-Factor Analysis and a Multi-Model Ensemble
Hui Liu, Rui Yang, Zhu Duan, Haiping Wu
Journal Article
Stability of Boolean networks with state-dependent random impulses
Ya-wen Shen, Yu-qian Guo, Wei-hua Gui,shenyawen@csu.edu.cn,gyuqian@csu.edu.cn,gwh@csu.edu.cn
Journal Article
A distributed EEMDN-SABiGRU model on Spark for passenger hotspot prediction
夏大文,耿建,黄瑞曦,申冰琪,胡杨,李艳涛,李华青
Journal Article
Exploring the Logic and Landscape of the Knowledge System: Multilevel Structures, Each Multiscaled with Complexity at the Mesoscale
Jinghai Li
Journal Article
Synchronization transition of a modular neural network containing subnetworks of different scales
Weifang HUANG, Lijian YANG, Xuan ZHAN, Ziying FU, Ya JIA,jiay@ccnu.edu.cn
Journal Article
Faster fog-aided private set intersectionwith integrity preserving
Qiang WANG, Fu-cai ZHOU, Tie-min MA, Zi-feng XU
Journal Article
Studies on the Inhibition of Impurities in Caustic Decomposition of Tungsten Concentrates
Li Honggui,Li Yunjiao,Sun Peimei,Liu Maosheng
Journal Article
The Realization of Time-Triggered Control Area Network
Lü Weijie,,Liu Luyuan,Wang Yixin
Journal Article
Noise Reduction of Vibration Signal of Cyclic Machine Based on the EMD
Yang Jianwen,Jia Minping,Xu Feiyun,Hu Jianzhong
Journal Article