In this study,using 3,5‑di(3′,5′‑dicarboxylphenyl)‑1H‑1,2,4‑triazole(H4L)as ligands,a gadolinia‑based organic framework complex{[GdNa(L)(H_(2)O)3]·2H_(2)O}_(n)(Gd‑Na‑MOF)was successfully designed and synthesize...In this study,using 3,5‑di(3′,5′‑dicarboxylphenyl)‑1H‑1,2,4‑triazole(H4L)as ligands,a gadolinia‑based organic framework complex{[GdNa(L)(H_(2)O)3]·2H_(2)O}_(n)(Gd‑Na‑MOF)was successfully designed and synthesized by hydrothermal method.The structure and properties were systematically characterized and tested by techniques such as single‑crystal X‑ray diffraction,powder X‑ray diffraction,thermogravimetric analysis,infrared spectroscopy,and fluorescence spectroscopy.The results indicate that this complex has a unique 3D structure,excellent thermal stability,and outstanding luminescent performance.Based on its luminescent properties,a polymer‑embedding method was employed to fabricate the Gd‑Na‑MOF into a flexible,washable composite fluorescent film,Gd‑Na‑MOF@PMMA/BMA(PMMA=polymethyl methacrylate,BMA=butyl methacrylate).This fluorescent film exhibited highly sensitive recognition capability for tyramine,with a low detection limit of 1.66μmol·L^(-1).It was used for the detection of tyramine in bananas,with a recovery rate of 96.92%‑100.26%.CCDC:2466949.展开更多
网络协议安全对于互联网信息安全至关重要。目前主流的网络协议漏洞挖掘技术在安全性能、数据完整性、协议解析和逆向漏洞挖掘等方面还存在缺陷。模糊测试因其自动化程度高且能直接获得漏洞概念验证(Proof of Concept,PoC)的特点,在协...网络协议安全对于互联网信息安全至关重要。目前主流的网络协议漏洞挖掘技术在安全性能、数据完整性、协议解析和逆向漏洞挖掘等方面还存在缺陷。模糊测试因其自动化程度高且能直接获得漏洞概念验证(Proof of Concept,PoC)的特点,在协议安全测试中被广泛使用。然而,针对闭源协议的模糊测试,目前还缺少成熟的解决方案。因此,提出了NASFuzz模糊测试框架,能够对闭源NAS协议(NFS、NAS Find协议)进行漏洞挖掘。首先对闭源协议通信字段进行逆向,形成语法语义合规的模板;其次基于该模板,针对性变异字段中的非保留字段进行变异,生成大量的测试字段对协议进行测试。实验显示,NASFuzz模糊测试框架相比黑盒模糊测试框架BooFuzz,其有效样例生成数量高出70%以上,代码覆盖率提升18%,证明NASFuzz对NAS协议的测试相比传统黑盒测试更充分。展开更多
文摘In this study,using 3,5‑di(3′,5′‑dicarboxylphenyl)‑1H‑1,2,4‑triazole(H4L)as ligands,a gadolinia‑based organic framework complex{[GdNa(L)(H_(2)O)3]·2H_(2)O}_(n)(Gd‑Na‑MOF)was successfully designed and synthesized by hydrothermal method.The structure and properties were systematically characterized and tested by techniques such as single‑crystal X‑ray diffraction,powder X‑ray diffraction,thermogravimetric analysis,infrared spectroscopy,and fluorescence spectroscopy.The results indicate that this complex has a unique 3D structure,excellent thermal stability,and outstanding luminescent performance.Based on its luminescent properties,a polymer‑embedding method was employed to fabricate the Gd‑Na‑MOF into a flexible,washable composite fluorescent film,Gd‑Na‑MOF@PMMA/BMA(PMMA=polymethyl methacrylate,BMA=butyl methacrylate).This fluorescent film exhibited highly sensitive recognition capability for tyramine,with a low detection limit of 1.66μmol·L^(-1).It was used for the detection of tyramine in bananas,with a recovery rate of 96.92%‑100.26%.CCDC:2466949.
文摘网络协议安全对于互联网信息安全至关重要。目前主流的网络协议漏洞挖掘技术在安全性能、数据完整性、协议解析和逆向漏洞挖掘等方面还存在缺陷。模糊测试因其自动化程度高且能直接获得漏洞概念验证(Proof of Concept,PoC)的特点,在协议安全测试中被广泛使用。然而,针对闭源协议的模糊测试,目前还缺少成熟的解决方案。因此,提出了NASFuzz模糊测试框架,能够对闭源NAS协议(NFS、NAS Find协议)进行漏洞挖掘。首先对闭源协议通信字段进行逆向,形成语法语义合规的模板;其次基于该模板,针对性变异字段中的非保留字段进行变异,生成大量的测试字段对协议进行测试。实验显示,NASFuzz模糊测试框架相比黑盒模糊测试框架BooFuzz,其有效样例生成数量高出70%以上,代码覆盖率提升18%,证明NASFuzz对NAS协议的测试相比传统黑盒测试更充分。
