期刊文献+
共找到10,237篇文章
< 1 2 250 >
每页显示 20 50 100
A Blind Batch Encryption and Public Ledger-Based Protocol for Sharing Sensitive Data 被引量:1
1
作者 Zhiwei Wang Nianhua Yang +2 位作者 Qingqing Chen Wei Shen Zhiying Zhang 《China Communications》 SCIE CSCD 2024年第1期310-322,共13页
For the goals of security and privacy preservation,we propose a blind batch encryption-and public ledger-based data sharing protocol that allows the integrity of sensitive data to be audited by a public ledger and all... For the goals of security and privacy preservation,we propose a blind batch encryption-and public ledger-based data sharing protocol that allows the integrity of sensitive data to be audited by a public ledger and allows privacy information to be preserved.Data owners can tightly manage their data with efficient revocation and only grant one-time adaptive access for the fulfillment of the requester.We prove that our protocol is semanticallly secure,blind,and secure against oblivious requesters and malicious file keepers.We also provide security analysis in the context of four typical attacks. 展开更多
关键词 blind batch encryption data sharing onetime adaptive access public ledger security and privacy
下载PDF
A linkable signature scheme supporting batch verification for privacy protection in crowd-sensing
2
作者 Xu Li Gwanggil Jeon +1 位作者 Wenshuo Wang Jindong Zhao 《Digital Communications and Networks》 SCIE CSCD 2024年第3期645-654,共10页
The maturity of 5G technology has enabled crowd-sensing services to collect multimedia data over wireless network,so it has promoted the applications of crowd-sensing services in different fields,but also brings more ... The maturity of 5G technology has enabled crowd-sensing services to collect multimedia data over wireless network,so it has promoted the applications of crowd-sensing services in different fields,but also brings more privacy security challenges,the most commom which is privacy leakage.As a privacy protection technology combining data integrity check and identity anonymity,ring signature is widely used in the field of privacy protection.However,introducing signature technology leads to additional signature verification overhead.In the scenario of crowd-sensing,the existing signature schemes have low efficiency in multi-signature verification.Therefore,it is necessary to design an efficient multi-signature verification scheme while ensuring security.In this paper,a batch-verifiable signature scheme is proposed based on the crowd-sensing background,which supports the sensing platform to verify the uploaded multiple signature data efficiently,so as to overcoming the defects of the traditional signature scheme in multi-signature verification.In our proposal,a method for linking homologous data was presented,which was valuable for incentive mechanism and data analysis.Simulation results showed that the proposed scheme has good performance in terms of security and efficiency in crowd-sensing applications with a large number of users and data. 展开更多
关键词 5G network Crowd-sensing Privacy protection Ring signature batch verification
下载PDF
Data complexity-based batch sanitization method against poison in distributed learning
3
作者 Silv Wang Kai Fan +2 位作者 Kuan Zhang Hui Li Yintang Yang 《Digital Communications and Networks》 SCIE CSCD 2024年第2期416-428,共13页
The security of Federated Learning(FL)/Distributed Machine Learning(DML)is gravely threatened by data poisoning attacks,which destroy the usability of the model by contaminating training samples,so such attacks are ca... The security of Federated Learning(FL)/Distributed Machine Learning(DML)is gravely threatened by data poisoning attacks,which destroy the usability of the model by contaminating training samples,so such attacks are called causative availability indiscriminate attacks.Facing the problem that existing data sanitization methods are hard to apply to real-time applications due to their tedious process and heavy computations,we propose a new supervised batch detection method for poison,which can fleetly sanitize the training dataset before the local model training.We design a training dataset generation method that helps to enhance accuracy and uses data complexity features to train a detection model,which will be used in an efficient batch hierarchical detection process.Our model stockpiles knowledge about poison,which can be expanded by retraining to adapt to new attacks.Being neither attack-specific nor scenario-specific,our method is applicable to FL/DML or other online or offline scenarios. 展开更多
关键词 Distributed machine learning security Federated learning Data poisoning attacks Data sanitization batch detection Data complexity
下载PDF
A Cooperated Imperialist Competitive Algorithm for Unrelated Parallel Batch Machine Scheduling Problem
4
作者 Deming Lei Heen Li 《Computers, Materials & Continua》 SCIE EI 2024年第5期1855-1874,共20页
This study focuses on the scheduling problem of unrelated parallel batch processing machines(BPM)with release times,a scenario derived from the moulding process in a foundry.In this process,a batch is initially formed... This study focuses on the scheduling problem of unrelated parallel batch processing machines(BPM)with release times,a scenario derived from the moulding process in a foundry.In this process,a batch is initially formed,placed in a sandbox,and then the sandbox is positioned on a BPM formoulding.The complexity of the scheduling problem increases due to the consideration of BPM capacity and sandbox volume.To minimize the makespan,a new cooperated imperialist competitive algorithm(CICA)is introduced.In CICA,the number of empires is not a parameter,and four empires aremaintained throughout the search process.Two types of assimilations are achieved:The strongest and weakest empires cooperate in their assimilation,while the remaining two empires,having a close normalization total cost,combine in their assimilation.A new form of imperialist competition is proposed to prevent insufficient competition,and the unique features of the problem are effectively utilized.Computational experiments are conducted across several instances,and a significant amount of experimental results show that the newstrategies of CICAare effective,indicating promising advantages for the considered BPMscheduling problems. 展开更多
关键词 Release time ASSIMILATION imperialist competitive algorithm batch processing machines scheduling
下载PDF
Batch Active Learning for Multispectral and Hyperspectral Image Segmentation Using Similarity Graphs
5
作者 Bohan Chen Kevin Miller +1 位作者 Andrea L.Bertozzi Jon Schwenk 《Communications on Applied Mathematics and Computation》 EI 2024年第2期1013-1033,共21页
Graph learning,when used as a semi-supervised learning(SSL)method,performs well for classification tasks with a low label rate.We provide a graph-based batch active learning pipeline for pixel/patch neighborhood multi... Graph learning,when used as a semi-supervised learning(SSL)method,performs well for classification tasks with a low label rate.We provide a graph-based batch active learning pipeline for pixel/patch neighborhood multi-or hyperspectral image segmentation.Our batch active learning approach selects a collection of unlabeled pixels that satisfy a graph local maximum constraint for the active learning acquisition function that determines the relative importance of each pixel to the classification.This work builds on recent advances in the design of novel active learning acquisition functions(e.g.,the Model Change approach in arXiv:2110.07739)while adding important further developments including patch-neighborhood image analysis and batch active learning methods to further increase the accuracy and greatly increase the computational efficiency of these methods.In addition to improvements in the accuracy,our approach can greatly reduce the number of labeled pixels needed to achieve the same level of the accuracy based on randomly selected labeled pixels. 展开更多
关键词 Image segmentation Graph learning batch active learning Hyperspectral image
下载PDF
Exact Tail Asymptotics for a Queueing System with a Retrial Orbit and Batch Service
6
作者 Huijun Lu 《Applied Mathematics》 2024年第6期406-420,共15页
This paper discusses a queueing system with a retrial orbit and batch service, in which the quantity of customers’ rooms in the queue is finite and the space of retrial orbit is infinite. When the server starts servi... This paper discusses a queueing system with a retrial orbit and batch service, in which the quantity of customers’ rooms in the queue is finite and the space of retrial orbit is infinite. When the server starts serving, it serves all customers in the queue in a single batch, which is the so-called batch service. If a new customer or a retrial customer finds all the customers’ rooms are occupied, he will decide whether or not to join the retrial orbit. By using the censoring technique and the matrix analysis method, we first obtain the decay function of the stationary distribution for the quantity of customers in the retrial orbit and the quantity of customers in the queue. Then based on the form of decay rate function and the Karamata Tauberian theorem, we finally get the exact tail asymptotics of the stationary distribution. 展开更多
关键词 Exact Tail Asymptotics batch Service Censoring Technique Matrix Analysis Method Karamata Tauberian Theorem
下载PDF
基于TFIDF+LDA和Mini Batch K⁃means算法的在线课程推荐方法研究
7
作者 严武军 王丽蓉 《现代计算机》 2023年第23期15-20,共6页
在线教育资源急剧增长让学习者难以抉择,研究在线课程分类推荐,能帮助学习者快速获取所需资源。首先将潜在狄利克雷分配算法融入词频-逆向文件频率算法对数据进行预处理,生成词向量矩阵;之后采用Mini Batch K-means算法训练聚类模型,并... 在线教育资源急剧增长让学习者难以抉择,研究在线课程分类推荐,能帮助学习者快速获取所需资源。首先将潜在狄利克雷分配算法融入词频-逆向文件频率算法对数据进行预处理,生成词向量矩阵;之后采用Mini Batch K-means算法训练聚类模型,并采用T分布随机邻域嵌入降维算法对训练结果进行可视化分析。实验采用从Pluralsight在线课程API获取8016条数据进行实验,实验结果表明融入潜在狄利克雷分配算法的词频-逆向文件频率算法效果更好。 展开更多
关键词 词频逆向文件频率 潜在狄利克雷分配 Mini batch K-means 在线课程推荐
下载PDF
基于在线梯度下降的Mini Batch K-Prototypes算法
8
作者 贾子琪 万世昌 +2 位作者 张腾飞 吉康毅 常雪瑞 《南阳理工学院学报》 2023年第4期45-49,共5页
K-Prototypes算法每次迭代都需要花费大量时间来计算所有样本与每个簇中心的相异度以将其划分到各个聚类簇中,这导致K-Prototypes算法在处理大型数据集时运行时间急剧增加。根据在线梯度下降算法对K-Prototypes算法的迭代过程进行优化,... K-Prototypes算法每次迭代都需要花费大量时间来计算所有样本与每个簇中心的相异度以将其划分到各个聚类簇中,这导致K-Prototypes算法在处理大型数据集时运行时间急剧增加。根据在线梯度下降算法对K-Prototypes算法的迭代过程进行优化,减少算法每次迭代所需的计算量从而降低算法的时间复杂度,提升算法运行效率。实验结果表明,提出的基于在线梯度下降的K-Prototypes聚类算法,可以在不影响算法收敛性和有效性的前提下降低算法的时间复杂度,提升算法运行效率。 展开更多
关键词 K-Prototypes Mini batch K-Prototypes 在线梯度下降
下载PDF
基于PCS7的BATCH控制在生物制药单抗生产中的应用 被引量:2
9
作者 王磊 《流体测量与控制》 2023年第2期92-97,共6页
随着生物制药的发展,单抗药物的生产越来越朝着系统化、集成化、数字化的方向发展。针对单抗药物复杂的工艺生产过程和配方多变的生产方式。本文采用西门子PCS7全集成DCS系统,利用符合ISA-S88标准的批量控制软件和配方管理,研究单抗控... 随着生物制药的发展,单抗药物的生产越来越朝着系统化、集成化、数字化的方向发展。针对单抗药物复杂的工艺生产过程和配方多变的生产方式。本文采用西门子PCS7全集成DCS系统,利用符合ISA-S88标准的批量控制软件和配方管理,研究单抗控制方案和第三方设备集成方案,设计出适用于单抗生产的批次控制DCS系统,满足其生产工艺、参数多变的柔性化需求和数据完整性要求。 展开更多
关键词 batch控制 PCS7 单抗 S88 配方控制
下载PDF
Research on Optimization of Dual-Resource Batch Scheduling in Flexible Job Shop
10
作者 Qinhui Liu Zhijie Gao +2 位作者 Jiang Li Shuo Li Laizheng Zhu 《Computers, Materials & Continua》 SCIE EI 2023年第8期2503-2530,共28页
With the rapid development of intelligent manufacturing and the changes in market demand,the current manufacturing industry presents the characteristics of multi-varieties,small batches,customization,and a short produ... With the rapid development of intelligent manufacturing and the changes in market demand,the current manufacturing industry presents the characteristics of multi-varieties,small batches,customization,and a short production cycle,with the whole production process having certain flexibility.In this paper,a mathematical model is established with the minimum production cycle as the optimization objective for the dual-resource batch scheduling of the flexible job shop,and an improved nested optimization algorithm is designed to solve the problem.The outer layer batch optimization problem is solved by the improved simulated annealing algorithm.The inner double resource scheduling problem is solved by the improved adaptive genetic algorithm,the double coding scheme,and the decoding scheme of Automated Guided Vehicle(AGV)scheduling based on the scheduling rules.The time consumption of collision-free paths is solved with the path planning algorithm which uses the Dijkstra algorithm based on a time window.Finally,the effectiveness of the algorithm is verified by actual cases,and the influence of AGV with different configurations on workshop production efficiency is analyzed. 展开更多
关键词 Dual resource scheduling batch optimization genetic algorithm simulated annealing time window
下载PDF
Rockburst Intensity Grade Prediction Model Based on Batch Gradient Descent and Multi-Scale Residual Deep Neural Network
11
作者 Yu Zhang Mingkui Zhang +1 位作者 Jitao Li Guangshu Chen 《Computer Systems Science & Engineering》 SCIE EI 2023年第11期1987-2006,共20页
Rockburst is a phenomenon in which free surfaces are formed during excavation,which subsequently causes the sudden release of energy in the construction of mines and tunnels.Light rockburst only peels off rock slices ... Rockburst is a phenomenon in which free surfaces are formed during excavation,which subsequently causes the sudden release of energy in the construction of mines and tunnels.Light rockburst only peels off rock slices without ejection,while severe rockburst causes casualties and property loss.The frequency and degree of rockburst damage increases with the excavation depth.Moreover,rockburst is the leading engineering geological hazard in the excavation process,and thus the prediction of its intensity grade is of great significance to the development of geotechnical engineering.Therefore,the prediction of rockburst intensity grade is one problem that needs to be solved urgently.By comprehensively considering the occurrence mechanism of rockburst,this paper selects the stress index(σθ/σc),brittleness index(σ_(c)/σ_(t)),and rock elastic energy index(Wet)as the rockburst evaluation indexes through the Spearman coefficient method.This overcomes the low accuracy problem of a single evaluation index prediction method.Following this,the BGD-MSR-DNN rockburst intensity grade prediction model based on batch gradient descent and a multi-scale residual deep neural network is proposed.The batch gradient descent(BGD)module is used to replace the gradient descent algorithm,which effectively improves the efficiency of the network and reduces the model training time.Moreover,the multi-scale residual(MSR)module solves the problem of network degradation when there are too many hidden layers of the deep neural network(DNN),thus improving the model prediction accuracy.The experimental results reveal the BGDMSR-DNN model accuracy to reach 97.1%,outperforming other comparable models.Finally,actual projects such as Qinling Tunnel and Daxiangling Tunnel,reached an accuracy of 100%.The model can be applied in mines and tunnel engineering to realize the accurate and rapid prediction of rockburst intensity grade. 展开更多
关键词 Rockburst prediction rockburst intensity grade deep neural network batch gradient descent multi-scale residual
下载PDF
Assessing the Impact of Fugitive Dust Emissions from Cement Silos at Cluster of Concrete Batching Facilities Using Air Dispersion Modeling
12
作者 Ahmed El-Said Rady Ashraf A. Zahran +1 位作者 Mokhtar S. Beheary Mossad El-Metwally 《Journal of Environmental Protection》 CAS 2023年第5期373-391,共19页
This research assessed the environmental impact of cement silos emission on the existing concrete batching facilities in M35-Mussafah, Abu Dhabi, United Arab Emirates. These assessments were conducted using an air qua... This research assessed the environmental impact of cement silos emission on the existing concrete batching facilities in M35-Mussafah, Abu Dhabi, United Arab Emirates. These assessments were conducted using an air quality dispersion model (AERMOD) to predict the ambient concentration of Portland Cement particulate matter less than 10 microns (PM<sub>10</sub>) emitted to the atmosphere during loading and unloading activities from 176 silos located in 25 concrete batching facilities. AERMOD was applied to simulate and describe the dispersion of PM<sub>10</sub> released from the cement silos into the air. Simulations were carried out for PM<sub>10</sub> emissions on controlled and uncontrolled cement silos scenarios. Results showed an incremental negative impact on air quality and public health from uncontrolled silos emissions and estimated that the uncontrolled PM<sub>10</sub> emission sources contribute to air pollution by 528958.32 kg/Year. The modeling comparison between the controlled and uncontrolled silos shows that the highest annual average concentration from controlled cement silos is 0.065 μg/m<sup>3</sup>, and the highest daily emission value is 0.6 μg/m<sup>3</sup>;both values are negligible and will not lead to significant air quality impact in the entire study domain. However, the uncontrolled cement silos’ highest annual average concentration value is 328.08 μg/m<sup>3</sup>. The highest daily emission average value was 1250.09 μg/m<sup>3</sup>;this might cause a significant air pollution quality impact and health effects on the public and workers. The short-term and long-term average PM<sub>10</sub> pollutant concentrations at these receptors predicted by the air dispersion model are discussed for both scenarios and compared with local and international air quality standards and guidelines. 展开更多
关键词 Air Dispersion Modeling Concrete batching Facilities AERMOD PM10 Fugitive Emissions Environmental Impact
下载PDF
Aspen Batch Process Developer在原料药工程设计中的应用研究
13
作者 李振宇 《化工与医药工程》 2023年第2期28-34,共7页
基于Aspen Batch Process Developer软件对原料药工程设计进行应用研究。在某原料药项目中,通过软件建立工艺流程模拟模型,分析批次操作时间、年生产批次、年生产规模、物料衡算、设备选型和利用率、公用工程消耗等,在满足生产需求的情... 基于Aspen Batch Process Developer软件对原料药工程设计进行应用研究。在某原料药项目中,通过软件建立工艺流程模拟模型,分析批次操作时间、年生产批次、年生产规模、物料衡算、设备选型和利用率、公用工程消耗等,在满足生产需求的情况下,达到优化生产排班、设备选型和公用工程量的目的。 展开更多
关键词 ASPEN batch PROCESS DEVELOPER 原料药 流程模拟
下载PDF
Comparative Analysis of PM10 Emission Rates from Controlled and Uncontrolled Cement Silos in Concrete Batching Facilities
14
作者 Ahmed El-Said Rady Mokhtar S. Beheary +1 位作者 Mossad El-Metwally Ashraf A. Zahran 《Open Journal of Air Pollution》 2023年第2期67-77,共11页
This research study quantifies the PM<sub>10</sub> emission rates (g/s) from cement silos in 25 concrete batching facilities for both controlled and uncontrolled scenarios by applying the USEPA AP-42 guide... This research study quantifies the PM<sub>10</sub> emission rates (g/s) from cement silos in 25 concrete batching facilities for both controlled and uncontrolled scenarios by applying the USEPA AP-42 guidelines step-by-step approach. The study focuses on evaluating the potential environmental impact of cement dust fugitive emissions from 176 cement silos located in 25 concrete batching facilities in the M35 Mussafah industrial area of Abu Dhabi, UAE. Emission factors are crucial for quantifying the PM<sub>10</sub> emission rates (g/s) that support developing source-specific emission estimates for areawide inventories to identify major sources of pollution that provide screening sources for compliance monitoring and air dispersion modeling. This requires data to be collected involves information on production, raw material usage, energy consumption, and process-related details, this was obtained using various methods, including field visits, surveys, and interviews with facility representatives to calculate emission rates accurately. Statistical analysis was conducted on cement consumption and emission rates for controlled and uncontrolled sources of the targeted facilities. The data shows that the average cement consumption among the facilities is approximately 88,160 (MT/yr), with a wide range of variation depending on the facility size and production rate. The emission rates from controlled sources have an average of 4.752E<sup>-04</sup> (g/s), while the rates from uncontrolled sources average 0.6716 (g/s). The analysis shows a significant statistical relationship (p < 0.05) and perfect positive correlation (r = 1) between cement consumption and emission rates, indicating that as cement consumption increases, emission rates tend to increase as well. Furthermore, comparing the emission rates from controlled and uncontrolled scenarios. The data showed a significant difference between the two scenarios, highlighting the effectiveness of control measures in reducing PM<sub>10</sub> emissions. The study’s findings provide insights into the impact of cement silo emissions on air quality and the importance of implementing control measures in concrete batching facilities. The comparative analysis contributes to understanding emission sources and supports the development of pollution control strategies in the Ready-Mix industry. 展开更多
关键词 Emission Factors Concrete batching Cement Dust PM10 Fugitive Emissions SILOS Environmental Impact Air Quality Ready-Mix Industrial Facilities
下载PDF
China set quota for second batch of rare earth mining,smelting and separation in 2023
15
《China Rare Earth Information》 2023年第3期25-25,共1页
China set a quota for the second batch of rare earth mining in 2023 at 120,000 tonnes,with a quota for smelting and separation at 115,000 tonnes,according to a joint statement by the Ministry of Industry and Informati... China set a quota for the second batch of rare earth mining in 2023 at 120,000 tonnes,with a quota for smelting and separation at 115,000 tonnes,according to a joint statement by the Ministry of Industry and Information Technology(MIIT)and the Ministry of Natural Resources. 展开更多
关键词 batch MINING SEPARATION
下载PDF
China issued the third batch of rare earth quotas for 2023
16
《China Rare Earth Information》 2023年第4期28-28,共1页
The Ministry of Industry and Information Technology(MIIT)and the Ministry of Natural Resources jointly released the third batch of quota for rare earth mining at 15,000 tons and quota for rare earth smelting and separ... The Ministry of Industry and Information Technology(MIIT)and the Ministry of Natural Resources jointly released the third batch of quota for rare earth mining at 15,000 tons and quota for rare earth smelting and separation at 13,850 tons on December 15,2023.According to MIIT,the third batch of rare earth quotas were issued to China Rare Earth Group and China Northern Rare Earth Group,respectively.China Rare Earth Group was allocated a quota of 5,850tons REO,including 3,000 tons REO of mineral products and 2,850 tons REO of smelting&separation products.China Northern Rare Earth(Group)received a quota of 23,000 tons REO,containing 12,000tons REO of mineral products and 11,000 tons REO of smelting&separation products. 展开更多
关键词 jointly batch SEPARATION
下载PDF
一种有效的Batch RSA改进算法 被引量:2
17
作者 李云飞 柳青 +1 位作者 李彤 郝林 《小型微型计算机系统》 CSCD 北大核心 2012年第1期64-70,共7页
Batch RSA算法的解密性能与指数计算阶段的大数模幂运算的实现效率有着直接的关系.针对提升Batch RSA算法的解密性能,提出一种Batch RSA算法的改进方案.提升通过将Batch RSA算法指数计算阶段的一些运算量转移到加密方,并且运用多素数技... Batch RSA算法的解密性能与指数计算阶段的大数模幂运算的实现效率有着直接的关系.针对提升Batch RSA算法的解密性能,提出一种Batch RSA算法的改进方案.提升通过将Batch RSA算法指数计算阶段的一些运算量转移到加密方,并且运用多素数技术使得解密时大数模幂运算的模数位数和指数位数减小.理论分析和实验结果表明该方案不仅提升了批处理RSA算法的解密性能,且该方案易于并行实现,可使得基于多核平台的RSA密码算法的性能得到进一步提升. 展开更多
关键词 batch RSA Multi-Prime 解密 加速 并行 多核
下载PDF
一种有效的Batch RSA算法的研究 被引量:2
18
作者 李云飞 柳青 +1 位作者 李彤 郝林 《计算机科学》 CSCD 北大核心 2011年第6期127-132,139,共7页
提出了一种改进的Batch RSA算法来提升Batch RSA算法的解密性能。该改进算法结合了负载转移技术和Multi-Power RSA技术,在Batch RSA算法的指数计算阶段提升Batch RSA算法的解密性能。实验结果和理论分析表明,该改进算法使得Batch RSA算... 提出了一种改进的Batch RSA算法来提升Batch RSA算法的解密性能。该改进算法结合了负载转移技术和Multi-Power RSA技术,在Batch RSA算法的指数计算阶段提升Batch RSA算法的解密性能。实验结果和理论分析表明,该改进算法使得Batch RSA算法的解密性能得到显著提升,且易于并行实现,可使基于多核平台的BatchRSA算法的整体性能得到进一步提升。 展开更多
关键词 batch RSA MULTI-POWER RSA 解密 加速 并行 多核
下载PDF
视频流点播Dynamic Batched Patching算法研究 被引量:3
19
作者 周建政 蒋建国 +1 位作者 韩江洪 齐美彬 《电子学报》 EI CAS CSCD 北大核心 2004年第3期452-456,共5页
本文提出了一个新的视频流点播传输策略 ,用以解决现有传输策略中存在的系统资源利用率低 ,QoS较差等问题 .该策略的思想是服务器根据用户请求到达时刻 ,按动态批处理的方式来接纳并服务请求用户 ,每组用户必须同时从一个或两个信道接... 本文提出了一个新的视频流点播传输策略 ,用以解决现有传输策略中存在的系统资源利用率低 ,QoS较差等问题 .该策略的思想是服务器根据用户请求到达时刻 ,按动态批处理的方式来接纳并服务请求用户 ,每组用户必须同时从一个或两个信道接收视频内容 .文中对本策略的性能进行了理论推导与定量分析 ,并与现有传输策略作了性能比较 ,最后采用仿真实验对前面的理论分析与比较进行了验证 .理论分析及实验结果表明该策略是一个简单高效的传输策略 。 展开更多
关键词 VOD 视频流 传输机制 DYNAMIC batched Patching算法 传输策略 视频流点播系统
下载PDF
改进的Batch RSA算法的设计与实现 被引量:1
20
作者 李云飞 柳青 +1 位作者 郝林 刘庆龙 《计算机工程与应用》 CSCD 北大核心 2011年第29期107-109,199,共4页
Batch RSA算法的解密性能与其指数计算阶段的大数模幂运算的实现效率有着直接的关系。提出了一种Batch RSA算法的改进方案,通过将Batch RSA算法解密时指数计算阶段的一些运算量转移到加密方,运用多素数技术使大数模幂运算的模位数和指... Batch RSA算法的解密性能与其指数计算阶段的大数模幂运算的实现效率有着直接的关系。提出了一种Batch RSA算法的改进方案,通过将Batch RSA算法解密时指数计算阶段的一些运算量转移到加密方,运用多素数技术使大数模幂运算的模位数和指数位数减小来加速Batch RSA的解密过程。理论分析和实验数据表明该改进算法使得Batch RSA算法的解密性能得到明显提升。 展开更多
关键词 batch RSA 加速 解密 模幂
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部