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基于机器学习的网络入侵检测系统研究

移动信息 2024年第7期46卷 350-352页

作者：戴鹭明厦门南洋职业学院福建厦门361102

近年来,机器学习技术的迅速发展为改进网络入侵检测系统(NIDS)提供了新的视角和方法。文中详细探讨了机器学习在网络入侵检测中的应用,涵盖了机器学习的基本理论、模型应用、数据处理与特征选择方法,以及模型的训练和优化。通过深入分... 详细信息

近年来,机器学习技术的迅速发展为改进网络入侵检测系统(NIDS)提供了新的视角和方法。文中详细探讨了机器学习在网络入侵检测中的应用,涵盖了机器学习的基本理论、模型应用、数据处理与特征选择方法,以及模型的训练和优化。通过深入分析和总结可以发现,机器学习技术不仅提高了入侵检测系统的智能化水平,还增强了其在面对复杂和新型网络攻击时的适应能力和预测能力。这些技术的进步有助于提升NIDS的整体防护效果,使其在网络安全领域展现出更强的防御能力。研究结果表明,基于机器学习的网络入侵检测系统能提升检测效率和准确性,对于防御新型网络攻击手段具有显著优势。

关键词：网络安全网络入侵检测机器学习数据处理

Carbothermic reduction of vanadium titanomagnetite with the assistance of sodium carbonate

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 239-247页

作者： luming Chen Yulan Zhen Guohua Zhang Desheng Chen Lina Wang Hongxin Zhao Fancheng meng Tao Qi National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100190China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The carbothermic reduction of vanadium titanomagnetite concentrate(VTC)with the assistance of Na_(2)CO_(3)was conducted in an argon atmosphere between 1073 and 1473 K.X-ray diffraction and scanning electron microscopy were used to investigate the phase transformations during the *** investigating the reaction between VTC and Na_(2)CO_(3),it was concluded that molten Na_(2)CO_(3)broke the structure of titanomagnetite by combining with the acidic oxides(Fe_(2)O_(3),TiO_(2),Al_(2)O_(3),and SiO_(2))to form a Na-rich melt and release FeO and ***,Na_(2)CO_(3)accelerated the reduction *** addition,adding Na_(2)CO_(3)also benefited the agglomeration of iron particles and the slag–metal separation by decreasing the viscosity of the ***,Na_(2)CO_(3)assisted carbothermic reduction is a promising method for treating VTC at low temperatures.

关键词： vanadium titanomagnetite sodium carbonate phase transformation carbothermic reduction slag–metal separation

Nest-type NCM ■ Pt/C with oxygen capture character as advanced electrocatalyst for oxygen reduction reaction

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Journal of Energy Chemistry 2022年第8期31卷 304-312,I0009页

作者： Teng Chen Yida Xu Deming meng Xuefeng Guo Yan Zhu luming Peng Jianqiang Hu Weiping Ding Key Lab of Mesoscopic Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023JiangsuChina Department of Aviation Oil and Material Air Force Logistics AcademyXuzhou 221000Jiangsu.China

A unique nest-type catalyst has been designed with a nest of oxygen capture surrounding catalytic Pt centers, which shows much promoted performance, on the base of Pt/C catalyst, for oxygen reduction reaction(ORR). The nest is constructed with nitrogen-doped carbon matrix(NCM), derived from the controlled carbonization of PANI precursor, to cover Pt/C catalyst. The unique structure of the catalyst(denoted as NCM■ Pt/C) has many merits. Firstly, it can capture oxygen both in air and in acidic electrolyte. Compared with naked Pt/C, it is found that, in air, the oxygen concentration within the porous nest of NCM surrounding Pt/C particles is ~13 times higher than atmospheric oxygen concentration and, in acidic electrolyte, the concentration of activated oxygen over the catalyst NCM■ Pt/C rise to~1.9 times. Secondly, the NCM nest offers a special electronic modulation on Pt centers toward modified ORR kinetics and then catalytic performances. With these merits, compared with Pt/C, the NCM■ Pt/C catalyst shows 3.2 times higher turnover frequency value and 2.9 times enhanced specific activity for ORR with half-wave potential at 0.894 V. After 50,000 sweeping cycles, the NCM■ Pt/C catalyst retains~66% mass activity and still has advantages over the fresh Pt/C catalyst. We envision that the nest-type catalyst provides a new idea for progress of practical Pt/C ORR catalyst.

关键词： Oxygen reduction reaction Surrounding environment Nest-type catalyst Oxygen capture Electronic modulation

不同品种核桃仁成分及烘烤对其油脂品质和内源性蛋白酶活性的影响

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中国油脂 2024年第5期49卷 42-47页

作者：王鲁明黄闽敏陈业明江南大学食品学院江苏无锡214122 新疆林科院经济林研究所乌鲁木齐830092

旨在为工业去衣核桃仁的烘烤处理条件提供参考,选择我国4个品种核桃仁作为研究对象,比较了4种核桃仁的蛋白质和脂肪含量,分析了其氨基酸和脂肪酸组成,并考察了烘烤(60~140℃烘烤1~3 h使水分含量降至5%以下)对这4种去衣核桃仁油脂品质及... 详细信息

旨在为工业去衣核桃仁的烘烤处理条件提供参考,选择我国4个品种核桃仁作为研究对象,比较了4种核桃仁的蛋白质和脂肪含量,分析了其氨基酸和脂肪酸组成,并考察了烘烤(60~140℃烘烤1~3 h使水分含量降至5%以下)对这4种去衣核桃仁油脂品质及内源性蛋白酶活性的影响。结果表明:核桃仁蛋白质(13.73%~17.54%)、脂肪(69.10%~72.77%)含量及其油脂亚麻酸含量(8.77%~13.23%)在品种间存在显著性差异(p<0.05),而氨基酸组成未表现出明显差异;随着烘烤温度的升高,4种去衣核桃仁油脂的酸值及过氧化值均呈现不断上升的趋势,但均未超过国家标准要求;未烘烤核桃仁内源性蛋白酶活性在品种间也存在显著性差异(p<0.05);烘烤温度对核桃仁内源性蛋白酶活性有显著影响,60~80℃烘烤尚且保留了大部分的内源性蛋白酶活性,而100~140℃烘烤核桃仁内源性蛋白酶活性大幅度下降甚至丧失。综上,烘烤对去衣核桃仁油脂及内源性蛋白酶的影响并不因核桃品种的不同而产生差异,60~80℃的烘烤适合生产高内源性蛋白酶活性的去衣核桃仁(坚果类产品)。

关键词：核桃去衣核桃仁烘烤温度核桃油内源性蛋白酶

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shRNA-mediated Slc38a1 silencing inhibits migration, but not invasiveness of human pancreatic cancer cells

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Chinese Journal of Cancer Research 2013年第5期25卷 514-519页

作者： Jing Xie Zhen Chen luming Liu Ping Li Xiaoyan Zhu Huifeng Gao Zhiqiang meng Department of Integrative Oncology Fudan University Shanghai Cancer Center Department of Oncology Shanghai Medical CollegeFudan University Stem Cell Research Center Renji HospitalSchool of MedicineShanghai Jiao Tong University

Objective：Early metastasis is a major biological feature of pancreatic *** current study examined whether silencing Slc38a1,a gene involved in energy metabolism,using short hairpin RNA （shRNA） could inhibit the growth,migration,and invasiveness of pancreatic cancer ***：A series of Slc38a1 shRNAs were designed and cloned into the pGPU6/GFP/Neo *** shRNA with the most efficacious inhibitory action on SCL38A1 expression （65％ inhibition） upon screening in DH5α bacteria was used to transfect SW1990 human pancreatic cancer *** growth,migration,and invasiveness were examined using cell counting kit-8,Boyden chamber without and with Matrigel,***：Transfection of SW1990 cells with the SLCs38A1 shRNA significantly decreased the proliferation （P＜0.0001） and migratory potential （by 46.7％,P=0.0399） of the cancer ***,however,was not ***：Inhibiting Slc38a1 using shRNA technology could decrease the growth and migration of representative pancreatic cancer ***,the fact that invasiveness was not affected suggested that SLC38A1 is unlikely to be responsible for early metastasis.

关键词： Slc38a1 shRNA pancreatic cancer

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金属橡胶阻尼三向减振器力学特性与环境效应

机械科学与技术 2024年第8期43卷 1323-1332页

作者：邹路明郑超任子林赵旭薛新福州大学机械工程及自动化学院金属橡胶与振动噪声研究所福州350116

为满足精密装备多向循环载荷和多重环境减振降噪需求,设计了一款金属橡胶和斜置矩形弹簧组合式三向减振器,建立了动力学理论模型和动态试验测试系统,分析减振系统固有频率、动刚度和阻尼比在各工况下演变规律。通过理论模型预测与试验... 详细信息

为满足精密装备多向循环载荷和多重环境减振降噪需求,设计了一款金属橡胶和斜置矩形弹簧组合式三向减振器,建立了动力学理论模型和动态试验测试系统,分析减振系统固有频率、动刚度和阻尼比在各工况下演变规律。通过理论模型预测与试验相结合方法,分析了激振量级对三向组合式减振器动态力学性能的影响规律,以及在常温、高低温、盐雾和湿热等环境下的动态性能指标变化规律和阻尼耗能机制。研究结果表明:随着激振量级的增加,三向组合式减振器固有频率、动刚度和阻尼比有减小趋势,出现刚度软化现象,动力学理论模型解析分析相关性能演变趋势与试验结果具有较好一致性;在各服役环境工况下,金属橡胶阻尼三向减振器力学性能最大变化率可看出该减振器力学特性具有较高稳定性和一致性。

关键词：金属橡胶三向减振器动态性能阻尼耗能环境效应

Recent advancement of chemical imaging in pharmaceutical quality control:From final product testing to industrial utilization

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Journal of Innovative Optical Health Sciences 2020年第1期3卷 19-34页

作者： luming Liu Haibin Qu College of Pharmaceutical Sciences Zhejiang University HangzhouZhejiang 310058P.R.China

Chemical imaging(CI)possesses a strong ability of pharmaceutical *** great strength relies on the integration of traditional spectroscopy(one dimension)and imaging technique(two dimensions)to generate three-dimensional data *** pre-processing or processing methods are proposed to analyze vast data matrixes and thereby realizing different research *** this review paper,various pharmaceutical applications of quality control over the past few years are summed up in two groups of final product test and industrial *** scope of"quality control"here includes traditional analytical use,process understanding and manufactural ***,two major challenges about undesirable sample geometry and lengthy acquisition time are discussed for prospective commercial or industrial application.

关键词： Hyperspectral imaging pharmaceutical application multivariate data analysis quality control

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试论农民获得感的生成逻辑

北京农业职业学院学报 2024年第5期38卷 10-17页

作者：蔡炉明钟宇景德镇陶瓷大学管理与经济学院江西景德镇333403 鄂州职业大学学报编辑部湖北鄂州436000

农民获得感涵盖农民个体获得感和农民群体获得感。对农民获得感的内涵及类型划分进行界定,并立足农民获得感典型案例,利用需求层次、社会实践、社会认同、全面发展等理论,聚焦获得感酝酿期、获得感发展期、获得感生成期等阶段,剖析不同... 详细信息

农民获得感涵盖农民个体获得感和农民群体获得感。对农民获得感的内涵及类型划分进行界定,并立足农民获得感典型案例,利用需求层次、社会实践、社会认同、全面发展等理论,聚焦获得感酝酿期、获得感发展期、获得感生成期等阶段,剖析不同类型农民获得感的生成脉络与逻辑。其中,农民个体获得感的生成大致遵循“个体需求推动—直接积极感知—个体认同塑造—个体全面发展”的脉络,农民群体获得感的生成大致遵循“群体需求拉动—间接积极感知—群体认同构建—群体全面发展”的脉络。农民获得感并非与生俱来和一成不变,因此,针对不同类型农民获得感的提升,应秉持共同体思维和系统治理导向,并采取差异化举措进行系统施治与整体提升。

关键词：农民获得感共同体思维系统治理乡村振兴

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辅助生殖技术与胎儿生长障碍

中华产科急救电子杂志 2024年第2期13卷 88-92页

作者：卫星孙路明上海市第一妇婴保健院胎儿医学科&产前诊断中心、同济大学附属妇产科医院、上海市母胎医学重点实验室 201204

辅助生殖技术受孕对胎儿生长的影响可表现为胎儿生长受限或胎儿过度生长,其具体发生风险与移植的胚胎类型有关。辅助生殖技术影响胎儿生长的具体机制尚未完全明确,不同的机制被认为在早期胎盘形成缺陷中发挥作用。

关键词：生殖技术辅助体外受精胚胎移植胎儿发育胎盘形成