检索结果-南通市图书馆

维普期刊数据库

Securing Forwarding Layers from Eavesdropping Attacks Using Proactive Approaches

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第4期79卷 563-580页

作者： Jiajun Yan Ying Zhou Anchen Dai Tao Wang school of Electronics and communication Engineering Sun Yat-sen UniversityShenzhen518107China

As an emerging network paradigm,the software-defined network(SDN)finds extensive application in areas such as smart grids,the Internet of Things(IoT),and edge *** forwarding layer in software-defined networks is susceptible to eavesdropping *** hopping is amoving target defense(MTD)technology that is frequently employed to resist eavesdropping *** the traditional route hopping technology,both request and reply packets use the same hopping *** an eavesdropping attacker monitors the nodes along this path,the risk of 100%data leakage becomes *** this paper,we present an effective route hopping approach,called two-day different path(TDP),that turns communication paths into untraceable moving *** technology minimizes the probability of data leakage by transmitting request data and reply data through different ***,a brief introduction to the network model and attack model involved in this paper is ***,the algorithm and processingmethod of the TDP are ***,the paper proposes three differentmetrics tomeasure the effectiveness of the proposed ***,theoretical analysis and simulation results show that the TDP can effectively reduce the percentage of data exposure,decrease eavesdropping attack success probability,and improve the unpredictability of the path.

关键词： Route hopping moving target defense software-defined network two-way different path metrics

Mutual Information Maximization via Joint Power Allocation in Integrated Sensing and communications System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China communications 2024年第2期21卷 129-142页

作者： Jia Zhu Junsheng Mu Yuanhao Cui Xiaojun Jing school of Information and communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

In this paper, we focus on the power allocation of Integrated Sensing and communication(ISAC) with orthogonal frequency division multiplexing(OFDM) waveform. In order to improve the spectrum utilization efficiency in ISAC, we propose a design scheme based on spectrum sharing, that is,to maximize the mutual information(MI) of radar sensing while ensuring certain communication rate and transmission power constraints. In the proposed scheme, three cases are considered for the scattering off the target due to the communication signals,as negligible signal, beneficial signal, and interference signal to radar sensing, respectively, thus requiring three power allocation schemes. However,the corresponding power allocation schemes are nonconvex and their closed-form solutions are unavailable as a consequence. Motivated by this, alternating optimization(AO), sequence convex programming(SCP) and Lagrange multiplier are individually combined for three suboptimal solutions corresponding with three power allocation schemes. By combining the three algorithms, we transform the non-convex problem which is difficult to deal with into a convex problem which is easy to solve and obtain the suboptimal solution of the corresponding optimization problem. Numerical results show that, compared with the allocation results of the existing algorithms, the proposed joint design algorithm significantly improves the radar performance.

关键词： coexistence communications multicarrier radar mutual information spectrum sharing

维普期刊数据库

Wind Speed Short-Term Prediction Based on Empirical Wavelet Transform, Recurrent Neural Network and Error Correction

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2024年第2期29卷 297-308页

作者：朱昶胜朱丽娜 school of Computer and communication Lanzhou University of TechnologyLanzhou 730050China

Predicting wind speed accurately is essential to ensure the stability of the wind power system and improve the utilization rate of wind ***,owing to the stochastic and intermittent of wind speed,predicting wind speed accurately is difficult.A new hybrid deep learning model based on empirical wavelet transform,recurrent neural network and error correction for short-term wind speed prediction is proposed in this *** empirical wavelet transformation is applied to decompose the original wind speed *** long short term memory network and the Elman neural network are adopted to predict low-frequency and high-frequency wind speed sub-layers respectively to balance the calculation efficiency and prediction *** error correction strategy based on deep long short term memory network is developed to modify the prediction *** actual wind speed series are utilized to verify the effectiveness of the proposed *** empirical results indicate that the method proposed in this paper has satisfactory performance in wind speed prediction.

关键词： wind speed prediction empirical wavelet transform deep long short term memory network Elman neural network error correction strategy

Value Recognition:The International communication of Shared Human Values and Aesthetics:A Case Study of the Overseas Dissemination and Reception of Chinese Literature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Social Sciences in China 2024年第3期45卷 130-143页

作者： Sun Dehong school of Journalism and communication Nankai University

International communication should fundamentally aim at promoting the exchange and mutual learning of civilizations,achieving a transformation from"cultural clashes"to""civilizational exchange and mutual learning."The manifestation of international communication that facilitates this exchange and mutual learning is that the values contained in the communication texts ultimately become integrated into the culture of the receiving party and even into human culture as a whole due to this exchange and mutual *** civilizational exchange and mutual learning in international communication requires"value recognition"efforts between the disseminating and receiving parties,focusing on the universal values of human happiness for all,which is the"greatest common divisor"of value recognition among different receiving *** communication that facilitates the exchange and mutual learning of civilizations must take the inevitable route of such international communication:the path of aesthetic communication.

关键词： international communication ideal benchmark value recognition aesthetic communication

Multi-wavelength Brillouin erbium-doped fiber laser with 40 GHz frequency shift interval assisted by Sagnac loop filter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第5期20卷 265-271页

作者： QI Hexin ZHOU Xuefang ZHANG Yinghui YANG Guowei BI Meihua HU Miao school of communication Engineering Hangzhou Dianzi UniversityHangzhou 310018China

A switchable and tunable multi-wavelength Brillouin erbium-doped fiber laser(MWBEFL) is designed and experimentally demonstrated. A Sagnac loop filter is employed as the switcher to obtain the double Brillouin frequency shift(BFS) of 0.172 nm(~20 GHz) and the quadruple BFS of 0.35 nm(~40 GHz). The working principles of the proposed laser are theoretically analyzed. The experimental results show that up to 8 Stokes lines with a wavelength interval of 0.172 nm can be obtained. When the Sagnac loop filter is used, two different output spectra with wavelength interval of 0.35 nm are obtained by adjusting the polarization controller(PC) and the optical signal-to-noise ratio(OSNR) is greater than 33 dB. By adjusting the Brillouin pump(BP) wavelength to investigate the tunability of the fiber laser, the output of 2—5 laser channels can be realized corresponding to 20 nm wavelength range. This approach is simple and can be employed for the microwave generation of other frequency ranges subject to the filtering shift of the Sagnac loop.

关键词： fiber laser filter

维普期刊数据库

Research on Sarcasm Detection Technology Based on Image-Text Fusion

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第6期79卷 5225-5242页

作者： Xiaofang Jin Yuying Yang YinanWu Ying Xu school of Information and communication Engineering Communication University of ChinaBeijing100024China Cable Television Technology Research Institute Academy of Broadcasting ScienceBeijing100053China

The emergence of new media in various fields has continuously strengthened the social aspect of social *** tend to express emotions in social interactions,and many people even use satire,metaphors,and other techniques to express some negative emotions,it is necessary to detect sarcasm in social comment *** sarcasm,the more reference data modalities used,the better the experimental *** paper conducts research on sarcasm detection technology based on image-text fusion *** effectively utilize the features of each modality,a feature reconstruction output algorithm is *** algorithm is based on the attention mechanism,learns the low-rank features of another modality through cross-modality,the eigenvectors are reconstructed for the corresponding modality through weighted *** only the image modality in the dataset is used,the preprocessed data has outstanding performance in reconstructing the output model,with an accuracy rate of 87.6%.When using only the text modality data in the dataset,the reconstructed output model is optimal,with an accuracy rate of 85.2%.To improve feature fusion between modalities for effective classification,a weight adaptive learning algorithm is *** algorithm uses a neural network combined with an attention mechanism to calculate the attention weight of each modality to achieve weight adaptive learning purposes,with an accuracy rate of 87.9%.Extensive experiments on a benchmark dataset demonstrate the superiority of our proposed model.

关键词： Sentiment analysis sarcasm detection feature fusion feature reconstruction

Photoionisation detection of a single Er3+ ion with sub-100-ns time resolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2024年第4期11卷 38-45页

作者： Yangbo Zhang Wenda Fan Jiliang Yang Hao Guan Qi Zhang Xi Qin Changkui Duan Gabriele G.de Boo Brett C.Johnson Jeffrey C.Mc Callum Matthew J.Sellars Sven Rogge Chunming Yin Jiangfeng Du CAS Key Laboratory of Microscale Magnetic Resonance and school of Physical Sciences University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Hefei National Laboratory University of Science and Technology of China Centre of Excellence for Quantum Computation and communication Technology School of Physics University of New South Wales Centre of Excellence for Quantum Computation and communication Technology School of Engineering RMIT University Centre of Excellence for Quantum Computation and communication Technology School of Physics University of Melbourne Centre of Excellence for Quantum Computation and communication Technology Research School of Physics and Engineering Australian National University

Efficient detection of single optical centres in solids is essential for quantum information processing, sensing and single-photon generation *** this work,we use radio-frequency（RF） reflectometry to electrically detect the photoionisation induced by a single Er3+ion in *** high bandwidth and sensitivity of the RF reflectometry provide sub-100-ns time resolution for the photoionisation *** this technique,the optically excited state lifetime of a single Er3+ion in a Si nano-transistor is measured for the first time to be 0.49±0.04μ*** results demonstrate an efficient approach for detecting a charge state change induced by Er excitation and *** approach could be used for fast readout of other single optical centres in solids and is attractive for large-scale integrated optical quantum systems thanks to the multi-channel RF reflectometry demonstrated with frequency multiplexing techniques.

关键词： single optical centres erbium ions RF reflectometry photoionisation detection

Analysis of the Impact of Unequal Distribution of Educational Resources in Rural Areas of China on Educational Equity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Education and Teaching Research

Education and Teaching Research 2024年第2期 16-20页

作者： Li Jingna Department of international culture and communication China

This paper examines the unequal distribution of educational resources in rural areas of China and its impact on educational *** a comprehensive analysis of existing literature,case studies,and statistical data,the research identifies key disparities in areas such as teacher-to-student ratios,educational infrastructure,and educational *** study also explores the long-term effects of these disparities on social mobility and economic development in rural *** on international experiences from countries like Finland,South Korea,and Brazil,the paper offers policy recommendations and a practical pathway for *** include enhancing investment in rural education,improving teacher recruitment and retention,standardizing the curriculum,leveraging technology,strengthening early childhood education,and promoting lifelong learning *** paper concludes with a call to action for policymakers,educators,and community leaders to work collaboratively towards achieving educational equity and social justice in China.

关键词： Educational Equity Rural Education Resource Distribution Social Mobility Teacher Quality Technology in Education Early Childhood Education Lifelong Learning Policy Reform International Comparison

The Impact of Rising College Tuition in the United States on Students from Low-Income Families

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Education and Teaching Research

Education and Teaching Research 2024年第2期 26-30页

作者： Wang Wei Department of international culture and communication China

This paper examines the multifaceted economic,social,and psychological impacts of the rising cost of college tuition in the United States,with a particular focus on students from low-income *** escalating tuition fees have far-reaching implications,including increased student loan debt,delayed social mobility,and psychological stress among *** paper explores the barriers to higher education imposed by financial constraints and the systemic challenges that exacerbate income inequality in access to quality *** studies highlight the resilience of students who overcome these obstacles,as well as the struggles of those who face significant *** paper concludes with policy implications and recommendations for future research,emphasizing the need for a comprehensive approach to address the financial barriers in higher *** advocates for policy interventions that increase financial aid,reform educational funding,and promote innovative and affordable educational models to ensure equitable access to higher education.

关键词： Rising College Tuition Low-Income Students Student Loan Debt Social Mobility Higher Education Access Economic Impact Psychological Stress Financial Aid Educational Policy Innovation in Education