Liaoning, China

Anshan Normal University
Liaoning, China

Anshan Normal University is a university in the city of Anshan, in Liaoning province, China. It is under the provincial government. The school was founded in 1958 as a teacher training centre but suspended all operations in 1962 at the dawn of the Chinese Cultural Revolution before it was restarted again in 1978. The campus covers an area of 731,600 square meters. There is a teaching staff of 1207 over various levels from Professor down to post graduate teachers. Wikipedia.

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Neighbor discovery protocol (NDP) is the underlying protocol in the IPv6 protocol, which is mainly used to solve the problem of interconnection between nodes on the same link. But with wide use of IPV6, NDP becomes the main objects of a variety of attacks due to a lack of security mechanism. The paper introduces the working principle of the NDP and methods of how the SEND protocol to enhance NDP security defense. It also analyzes and summarizes the security threats caused by the defects of the protocol itself. On the basis of the SEND protocol, the NDP data packet structure is modified to enhance the security of the SEND. An improved NDP cheating defense technology is put forward to make up the defects of the SEND protocol which can't verify the correctness of the public key and cannot bind the MAC address. © 2017 Author(s).

Xi H.,Anshan Normal University
AIP Conference Proceedings | Year: 2017

With the continuous development of network technology and the rapid spread of the Internet, computer networks have been around the world every corner. However, the network attacks frequently occur. The ARP protocol vulnerability is one of the most common vulnerabilities in the TCP / IP four-layer architecture. The network protocol vulnerabilities can lead to the intrusion and attack of the information system, and disable or disable the normal defense function of the system [1]. At present, ARP spoofing Trojans spread widely in the LAN, the network security to run a huge hidden danger, is the primary threat to LAN security. In this paper, the author summarizes the research status and the key technologies involved in ARP protocol, analyzes the formation mechanism of ARP protocol vulnerability, and analyzes the feasibility of the attack technique. Based on the summary of the common defensive methods, the advantages and disadvantages of each defense method. At the same time, the current defense method is improved, and the advantage of the improved defense algorithm is given. At the end of this paper, the appropriate test method is selected and the test environment is set up. Experiment and test are carried out for each proposed improved defense algorithm. © 2017 Author(s).

Zhang F.,Anshan Normal University
Computational and Theoretical Chemistry | Year: 2017

The thermal stabilities and electronic properties of the three C56 fullerenes (#916C56, #864C56, and #913C56), their chlorinated derivatives, and the corresponding chlorofullerene oxides are investigated and compared using density functional theory (DFT) at the B3LYP/6-31G(d) level. #916C56 is the most stable isomer, but #916C56 and #864C56 possess almost degenerate energies (relative total energy 0.03 kcal/mol). The three experimentally observed C56 chlorides display the rather high chemical stabilities with the high exothermicities of their chlorination reactions (reaction energy between −38.86 and −48.89 kcal/mol), large HOMO-LUMO energy gaps (between 2.69 and 3.24 eV), and the aromatic character (nucleus independent chemical shifts between −13.6 and −17.6 ppm). Further addition of oxygen atom to the active sites of C56 chlorofullerenes results in the large stabilities of chlorofullerene oxides. Highly exothermic oxidation addition reactions (reaction energy between −83.66 and −87.24 kcal/mol) along with large HOMO-LUMO gaps (between 2.82 and 3.38 eV) indicate that these three chlorofullerene oxides are stable molecules. Similar to C56 chlorofullerenes, all investigated chlorofullerene oxides also possess aromatic nature. Hence, #864C56Cl12O and #916C56Cl12O like the well-known #913C56Cl10O can be isolated experimentally. The IR spectra have also been computed to assist future experimental characterization. © 2017

Dong S.,Tianjin Normal University | Zhao H.,Tianjin Normal University | Zhao H.,Anshan Normal University
Applied Physics Letters | Year: 2011

Magnetic properties of sp -electron half-metallic ferromagnets (HMFs) MC (M=Ca, Sr, and Ba) in rocksalt structure at ambient and elevated pressure have been investigated using first-principles within the generalized gradient approximation in the scheme of Perdew [Phys. Rev. Lett. 77, 3865 (1996)]. Magnetic moments, lattice constants, and total energies are calculated as a function of external pressure. The calculations predict the occurrence of pressure-induced magnetic phase transitions and find that the main reason for the magnetic transitions of sp -electron HMFs is the band widening of anion p states. © 2011 American Institute of Physics.

Zhu Y.,CAS Shenyang Institute of Metal Research | Zhu Y.,Anshan Normal University | Zhang B.,CAS Shenyang Institute of Metal Research | Liu X.,CAS Dalian Institute of Chemical Physics | And 2 more authors.
Angewandte Chemie - International Edition | Year: 2015

Non-precious Fe/N co-modified carbon electrocatalysts have attracted great attention due to their high activity and stability in oxygen reduction reaction (ORR). Compared to iron-free N-doped carbon electrocatalysts, Fe/N-modified electrocatalysts show four-electron selectivity with better activity in acid electrolytes. This is believed relevant to the unique Fe-N complexes, however, the Fe-N structure remains unknown. We used o,m,p-phenylenediamine as nitrogen precursors to tailor the Fe-N structures in heterogeneous electrocatalysts which contain FeS and Fe3C phases. The electrocatalysts have been operated for 5000 cycles with a small 39 mV shift in half-wave potential. By combining advanced electron microscopy and Mössbauer spectroscopy, we have identified the electrocatalytically active Fe-N6 complexes (FeN6, [FeIII(porphyrin)(pyridine)2]). We expect the understanding of the FeN6 structure will pave the way towards new advanced Fe-N based electrocatalysts. The active FeNx sites in Fe/N/C catalysts were identified by electron microscopy and Mössbauer spectroscopy as the six-coordinate FeIII species [FeIII(porphyrin)(pyridine)2]. The results lead the way to target-specific synthesis of highly active and stable non-precious metal catalysts for oxygen reduction reaction. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Liu B.,Anshan Normal University | Duan Y.,Fushun Sifang Senior High School | Luan S.,Liaoning Normal University
Nonlinear Analysis: Real World Applications | Year: 2012

In a polluted environment, considering the biological population infected with some kinds of diseases and hunted by human beings, we formulate two SI pollution-epidemic models with continuous and impulsive external effects, respectively, and investigate the dynamics of such systems. We assume that only the susceptible population is hunted by human beings. For the continuous system, we obtain sufficient conditions of the ultimate boundedness of solutions and the global asymptotical stability of equilibria. For the impulsive system, by using the comparison theorem and the analysis method, we show that under different conditions the disease-free periodic solution is globally asymptotically attractive, or the system is permanent. Numerical simulations confirm our theoretical results. © 2011 Elsevier Ltd. All rights reserved.

Wang K.,Anshan Normal University | Gao E.,Shenyang University of Chemical Technology
Journal of Coordination Chemistry | Year: 2014

Two Co(II) coordination polymers, {[Co(bdc)(bib)(H2O)] ·H2O}n (1) and {[Co(bdc)(bibp)]}n (2), where H2bdc = 1,4-benzenedicarboxylic acid, bib = 1,4-bis(1-imidazolyl)benzene, and bibp = 4,4′-bis(imidazolyl)biphenyl, have been synthesized by solvothermal methods and characterized by IR spectra, element analyses, thermal analysis, powder X-ray diffraction, and single crystal X-ray diffraction. Complex 1 exhibits a 3-D pillared-layer framework, the ligands of bib and bdc link Co ions to generate a 2-D layer structure, which is further pillared by the bib, giving the final 3-D pillared-layer networks. The void in 1 induces the three-fold interpenetrating structure. Complex 2 features three-fold interpenetrating 3-D architecture, bdc and bibp both adopt a bidentate bridging coordination to link Co ions to afford right-and left-handed helical chains; these helices fuse together and form the 3-D framework. © 2014 Taylor & Francis.

Wang K.,Anshan Normal University | Gao E.,Shenyang University of Chemical Technology
Anti-Cancer Agents in Medicinal Chemistry | Year: 2014

In the search for new metal-based anticancer agents as effective candidates for cisplatin, a lot of strategies such as synthesis of cisplatin analogs, trans-platinum compounds and non-platinum metal complexes have been put forward in the last forty years. The concept of multinuclearity for improving the chemotherapeutic activity has been proven in multinuclear platinum complexes such as BBR3464, recently, the effective approach has been successfully transferred to ruthenium complexes. In this review, we highlighted the recent progress in multinuclear platinum complexes and ruthenium complexes as anticancer agents, and their novel DNA binding properties such as phosphate clamps, long range DNA cross links, bisintercalation, interduplex cross links and DNA-protein cross-links were summarized to shed light on the rational design of polynuclear complexes as anticancer agents. © 2014 Bentham Science Publishers.

Using α-oxo-ketene dithioacetals 1a as odorless thiol equivlents, an efficient and odorless transthioacetalization of acetals 2 has been developed. In the presence of MeCOCl in MeOH, the cleavage of 1a commences to generate thiols at both room and reflux temperatures, and the generated thiols then react with acetals 2 to give correspecting thioacetals 3 in good yield. This transthioacetalization is characterized by mild reaction conditions, simple procedure, good yields, and perfect chemoselectivity. It is noteworthy that only a very faint odor of thiols can be perceived during both the reaction and workup. © 2013 Taylor and Francis Group, LLC.

Using 2-[bis(alkylthio)methylene]-3-oxo-N-o-tolylbutanamides 1 as odorless thiol equivalents, an efficient and odorless synthesis of thioethers has been developed. Promoted by NaOH in EtOH, the cleavage of 1 commences to generate thiolate anions, and the generated thiolate anions then react with halides to give various thioethers in good yield. It is noteworthy that only a very faint odor of thiols can be perceived during both the reaction and the workup. Using 2-[bis(alkylthio)methylene]-3-oxo-N-o-tolylbutanamides as odorless thiol equivalents, an efficient and odorless synthesis of thioethers has been developed. Promoted by NaOH in EtOH, the cleavage of 2-[bis(alkylthio)methylene] -3-oxo-N-o-tolylbutanamides commences to generate thiolate anions, and the generated thiolate anions then react with halides to give various thioethers in good yield. Copyright © 2012 SIOC, CAS, Shanghai & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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