检索结果-南通市图书馆

互联网黑灰产形成、演进与多元治理研究——以个人信息黑灰产为例

在线全文

学校读者我要写书评

暂无评论

浙江警察学院学报 2024年第2期 111-124页

作者：陈光宣陈平陈光笑浙江警察学院计算机与信息安全系浙江省公安厅网安总队浙江省温州市公安局

随着互联网与移动互联网应用持续快速发展,大量传统违法产业向网络空间快速蔓延,互联网黑灰产越来越多样化,手段不断迭代更新,技术性、专业性显著增强,持续为网各类涉网犯罪提供资源与掩护,形成规模庞大的互联网黑灰产业链。其中,个人... 详细信息

随着互联网与移动互联网应用持续快速发展,大量传统违法产业向网络空间快速蔓延,互联网黑灰产越来越多样化,手段不断迭代更新,技术性、专业性显著增强,持续为网各类涉网犯罪提供资源与掩护,形成规模庞大的互联网黑灰产业链。其中,个人信息交易是互联网黑灰产重灾区。个人信息黑灰产严重威胁国家安全和社会稳定,但由于法律规定模糊不清、取证难、维权难等问题,这一黑灰产业的打击和治理面临巨大挑战。互联网黑灰产治理与个人信息保护是一项长期性、系统性工程,需要从法治建设、技术反制、监管体系建设和行业标准建设等层面开展治理,需要多部门、全行业以及个人共同参与。

关键词：互联网黑灰产网络空间治理个人信息保护

红茶的体外模拟消化及TFDG对胰脂肪酶活性的抑制作用

在线全文

学校读者我要写书评

暂无评论

食品研究与开发 2024年第12期45卷 59-65页

作者：陈光萱袁慧聪王旭天津科技大学食品科学与工程学院天津300457

肥胖已成为影响人们生活方式的现代流行病,抑制胰脂肪酶的活性是治疗肥胖的关键。该研究考察红茶经体外模拟消化后酚类物质的生物可及性和抗肥胖特性,并通过荧光光谱探究茶黄素-3,3′-双没食子酸酯(theaflavin-3,3′-digallate,TFDG)对... 详细信息

肥胖已成为影响人们生活方式的现代流行病,抑制胰脂肪酶的活性是治疗肥胖的关键。该研究考察红茶经体外模拟消化后酚类物质的生物可及性和抗肥胖特性,并通过荧光光谱探究茶黄素-3,3′-双没食子酸酯(theaflavin-3,3′-digallate,TFDG)对胰脂肪酶活性的抑制机制。体外模拟消化试验结果表明,红茶在消化过程中酚类物质含量降低,最终生物可及性维持在32.04%,但经体外消化后其对胰脂肪酶活性的抑制率增加26.97%,并且有效地抑制了膳食脂肪的分解。荧光光谱分析结果表明TFDG能够静态猝灭胰脂肪酶的内源荧光,氢键和疏水作用是二者结合过程中的主要驱动力,并且在结合过程中胰脂肪酶的构象发生改变。

关键词：胰脂肪酶红茶茶黄素-3,3′-双没食子酸酯体外模拟消化荧光光谱

Broadband Constraint Based Simulated Annealing Impedance Inversion

在线全文

学校读者我要写书评

暂无评论

Broadband Constraint Based Simulated Annealing Impedance Inv...

Design and Realization of ActiveMQ Based High Performance Message Cluster

第二届国际计算科学与工程国际学术研讨会

作者： guangxuan chen Yanhui Du Panke Qin Lei Zhang People's Public Security University of China Beijing University of Posts and Telecommunications

In order to enhance the accuracy and improved the resolution of the inversion result in gas hydrate exploration, this paper proposed a new inversion method. By introducing broadband constraint based simulated annealing impedance inversion, the new method allows for a more extensive search for the optimal solution and is more efficient than exhaustive enumeration in solving global optimization problems. Compared to other inversion solutions as constraint sparse spike inversion and model based inversion, the new method not only solved the global optimization problems, but also improved the resolution of the profiles and enhanced the inversion accuracy, which is helpful to the later interpretation.

关键词： Broadband constraint Global optimization Impedance inversion Simulated annealing

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Design and Realization of ActiveMQ Based High Performance Me...

Petri Net Based Research of Home Automation Communication Protocol

第二届国际计算科学与工程国际学术研讨会

作者： guangxuan chen Yanhui Du Panke Qin Lei Zhang People's Public Security University of China Beijing University of Posts and Telecommunications

In order to solve the performance bottleneck problems and enhance the reliability of the message cluster, this paper proposed a new solution. By introducing ActiveMQ component and message agent, the message cluster can extend the single middleware into the message middleware environment, and thus improved the availability of the data in the shared file system and database. Meanwhile, a new algorithm and mechanism of load balancing, data synchronization and fault recovery are introduced into the message cluster that greatly enhanced the performance and reliability of the cluster.

关键词： ActiveMQ Data synchronization Fault recovery Load balancing Message cluster

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Petri Net Based Research of Home Automation Communication Pr...

Ground settlement sedimentation time-space effect and ground settlement control standards

2013年中国智能自动化学术会议

作者： guangxuan chen Yanhui Du Panke Qin Jin Du Na Li People’s Public Security Univesity of China

The popularity of home automation has been increasing greatly in recent years.However,during the designation of communication protocol(especially for asymmetric,parallel,distributed,uncertain or randomized protocol model) of home automation,many questions concerned.For instance,is the protocol correct? Is every message eventually delivered and received in the right order? Can two messages with the same alternating bit value be confused? In this paper we adopt Petri net to describe and analyze the protocol of home automation. Through the analysis of dynamic properties(such as reachability,boundedness, coverability and liveness) and invariants on the base of P/Tsystem modeling and its reachable marking graph,we verified the correctness of the communication protocol and finally optimized the protocol in practice.

关键词： Communication protocol Formal method Petri net Dynamic properties

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Global Geology 2013年第4期16卷 207-212页

作者： chen guangxuan QI Wei College of Construction Engineering Jilin University

Since different underground engineering contains different geological conditions,structure and excavation methods,their disturbing degree on the ground also differs,but ground surface settlement caused by excavation has one common point that they will form a ground surface settlement curve.Based on data statistical analysis,the article puts forward the relationship between point of inflection in digging tunnels with shallowburied method and the span of tunnel excavation against typical geological conditions in Changchun so as to predict the impact of tunnel excavation and improve reasonable ground surface settlement control standard.Research result will be useful for study on ground surface control standard in digging tunnels with shallow-buried method and setting settlement standard.

关键词：地面沉降控制沉降标准时空效应地表沉降控制隧道开挖数据统计分析 impact 地质条件

在线全文

学校读者我要写书评

暂无评论

移动僵尸网络评估的性能指标研究

计算机应用研究 2016年第3期33卷 821-826页

作者：李娜杜彦辉陈光宣河北省唐山市公安局指挥部情报中心河北唐山063000 中国人民公安大学网络安全保卫学院北京100038 浙江警察学院计算机与信息技术系杭州310053

为了全面、客观和系统地反映移动僵尸网络运行情况和攻击危害,针对移动僵尸网络评估的性能指标进行了研究。首先,将移动僵尸网络的性能指标进行分类和提取,并给出了数学计算式进行表述;提出了正性指标、负性指标和中性指标的概念,从而... 详细信息

为了全面、客观和系统地反映移动僵尸网络运行情况和攻击危害,针对移动僵尸网络评估的性能指标进行了研究。首先,将移动僵尸网络的性能指标进行分类和提取,并给出了数学计算式进行表述;提出了正性指标、负性指标和中性指标的概念,从而更有效地反映性能指标的属性;使用层次分析法对每个性能指标的权值进行了计算,并得出了计算结果。运用该评估性能指标对四个具有典型特点的移动网络进行了评估,验证了该方法的可行性和有效性。结果表明这种评估方法能够对移动僵尸网络的危害性进行综合评估,给防御策略提供了依据。

关键词：移动僵尸网络评估模型性能指标

Android智能手机动态内存取证技术综述

在线全文

学校读者我要写书评

暂无评论

信息网络安全 2019年第2期 10-17页

作者：丁丽萍刘雪花陈光宣李引中国科学院软件研究所北京100190 广州中国科学院软件应用技术研究所广东广州511458 中国科学院大学北京100049 浙江警察学院浙江杭州310053

不同于静态内存中敏感数据被加密存储,Android动态内存中一些敏感信息以明文的形式存在,如应用程序账户、密码、加密密钥以及一些缓存的应用数据等,这些数据具有极大的取证价值。而且随着智能手机动态内存容量的不断增大,越来越多的应... 详细信息

不同于静态内存中敏感数据被加密存储,Android动态内存中一些敏感信息以明文的形式存在,如应用程序账户、密码、加密密钥以及一些缓存的应用数据等,这些数据具有极大的取证价值。而且随着智能手机动态内存容量的不断增大,越来越多的应用数据被缓存至动态内存中,针对Android智能手机动态内存的电子数据取证研究具有重要意义。文章分析对比了LiME及其改进方法、FROST、MEMGRAB及其改进方法、硬件提取方法等主要的Android智能手机动态内存提取技术,分析了进程分析、系统信息分析、密钥分析、账号密码和应用缓存数据分析等主流的Android智能手机动态内存分析技术。文章通过分析得出了这些方法存在的问题和不足并提出未来研究方向的建议,以帮助取证人员更好地开展Android智能手机的取证工作。

关键词： Android 智能手机动态内存电子数据取证

A Meta-analysis of No-tillage Effects on Greenhouse Gas Emissions from Wheat-based Rotation Cropping Agroecosystem in China

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2023年第3期33卷 503-511页

作者： YAN guangxuan WANG Jieqi LUO Tingting chen Weiwei SHAO Yun LI Chunxi Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control(Ministry of Education) School of EnvironmentHenan Normal UniversityXinxiang 453007China College of Life Sciences Henan Normal UniversityXinxiang 453007China Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130102China

Globally,agricultural soils are considered as one of the most important sources of greenhouse gas(GHG)emissions.No-tillage(NT),one of the most admired ways of climate-smart agriculture,has been deemed to have co-benefit to mitigation of GHG emissions and sustainability for crop yield,however,the effect of NT on GHG emissions is controversial.This study analyzed the overall effects of NT on GHG emissions,as well as the moderators that significantly influenced the overall effects,of the wheat-based rotation cropping systems in China through meta-analysis.The results showed that the overall effect size of NT on methane(CH4)uptake,nitrous oxide(N2O)emission,and global warming potential(GWP)was 0.70(95%Confidence Interval(CI):0.21–1.19),-0.27(95%CI:-0.72–0.18),and-0.39(95%CI:-1.01–0.23),respectively.In temperate climate zones with alkaline soils,the nitrogen application rate of 120–240 kg/ha,NT could significantly reduce GHG emissions and GWP.However,the mitigation effect will be weakened along with NT duration,except for proper straw addition.Overall,NT has the potential to reduce GHG emissions from wheat-based rotation systems in China,but it is necessary to implement NT depending on local conditions,soil characteristics,and field management.

关键词： Wheat soil rotation