Security and Privacy in 5G Internet of Vehicles(IoV)Environment

Modern vehicles are equipped with sensors,communication,and computation units that make them capable of providing monitoring services and analysis of real-time traffic information to improve road safety.The main aim of communication in vehicular networks is to achieve an autonomous driving environment that is accident-free alongside increasing road use quality.However,the demanding specifications such as high data rate,low latency,and high reliability in vehicular networks make 5G an emerging solution for addressing the current vehicular network challenges.In the 5G IoV environment,various technologies and models are deployed,making the environment open to attacks such as Sybil,Denial of Service(DoS)and jamming.This paper presents the security and privacy challenges in an IoV 5G environment.Different categories of vehicular network attacks and possible solutions are presented from the technical point of view.

An Exploration on Undertaking Commercial Projects in School-Enterprise Cooperation from the Perspective of Applied Talents Cultivation

With the vibrant growth of IT and strong encouragement from the "Internet Plus" policy, China's craving for high-end IT talents has been aroused to another high level. With norms in IT talents requirement become more diverse and demanding, IT talents are pushed to embody both solid theoretical software knowledge and high capability in practice. All of these make it an extremely urgent task for strengthening applied talents with their practice capability in commercial projects. This paper, based on cultivating applied talents and by exemplifying the applied IT major in one university in H province, reinforced educational and cultivating reform, explored the undertaking of commercial projects in school-enterprise cooperation and contemplated the mode construction of applied talents cultivation to raise the cultivation quality and employment of applied talents in universities, effectively enhance the commercial value of education as well as its capability in serving local economy and finally achieve the goal of intensifying the link of talents cultivation through practice.

Ferrihydrite preparation and its application for removal of anionic dyes

Anionic dyes are hazardous and toxic to living organisms. For this study, ferrihydrite was prepared to test its removal capabilities on anionic dyes. A ferrihydrite particle prepared in neutral environmental conditions is sphere-like with a diameter of 2-4 nm and its total surface area is approximately 229 m^2· g^-1. In this paper, the effects of solution pH, competitive anions, and temperature on the adsorption of acid fuchsine onto ferrihydrite and the regeneration-reutilization of ferrihydrite were investigated in detail. The results indicate that ferrihydrite is an efficient sorbent for the removal of acid fuchsine at pH 4.0. The inhibitory effect of various competing anions on the present adsorption follows the precedence relationship： NO3 〈C1- 〈SO2- 〈H2PO~. Adsorption isotherms of acid fuchsine on ferrihydrite fit the Langmuir equation well. The Gibbs free energy, enthalpy, and entropy data of adsorption indicate that this adsorption is a spontaneous, exothermic, and physical process. A ferrihydrite was regenerated and reused five times, still retaining its original adsorption capacity.

The Spectrum for Overlarge Sets of Hybrid Triple Systems

A hybrid triple system of order v and index A, denoted by HTS（v, λ）, is a pair （X,B） where X is a v-set and B is a collection of cyclic triples and transitive triples on X, such that every ordered pair of X belongs to A triples of B. An overlarge set of disjoint HTS（v, λ）, denoted by OLHTS（v, λ）, is a collection {（Y／{y}, .Ai）}i, such that Y is a （v ＋ 1）-set, each （Y／{y}, Ai） is an HTS（v, λ,） and all Ais form a partition of all cyclic triples and transitive triples on Y. In this paper, we shall discuss the existence problem of OLHTS（v, A） and give the following conclusion： there exists an OLHTS（v, λ） if and only if λ= 1, 2, 4, v = 0, 1 （rood 3） and v ≥ 4.

Gold Nanoclusters Templated by Poly-cytosine DNA as Fluorescent Probes for Selective and Sensitive Detection of Thiocyanate

Gold nanoclusters(AuNCs) were prepared in the presence of the nucleobases of poly-cytosine DNAs in this paper. We have demonstrated tliat the fluorescence of the AuNCs is quenched by thiocyanate(SCN^-) through the interaction between SCN^- and gold atoms. AuNCs can receive energy from nucleobases to boost their emission intensity, while in the presence of SCN^-, they coordinate with Au atoms and influence the energy transfer between the nucleobases and AuNCs, leading to the fluorescence quenching. The decreased fluorescence intensity was in proportion to the concentration of SCN^- in the range of 8.0×10^-7-1.5×10^-5 mol/L with a limit of detection of 4.2×10^-7 mol/L(3σ). We further validated the practice of this probe througli the detection of SCbT in natural water samples.

Selective and Sensitive Discrimination of Zinc and Cadmium Based on a Novel Fluorescent Porous Organic Polymer

Zinc and cadmium are two main transition metal ions and play profound important roles in environmental and human health.But the distinctive detection of these two ions is still challenging since they belong to the same periodic group and have similar chemical properties.A fluorescent bipyridine-based porous organic polymer(Bpy-POP)containing aggregation caused quenching(ACQ)units(anthracene)and metal ions recognition units(bipyridine)was synthesized through the Schiff base condensation reaction.In the DMF/H_(2)O mixtures with the water fractions of 90%,the Bpy-POP aggregated and the fluorescent Bpy-POP quenched subsequently due to the ACQ effect of anthracene in the skeleton("OFF"state).With the addition of Zn^(2+)or Cd^(2+),however,the strong coordination of the bipyridine units from the adjacent Bpy-POPs with Zn^(2+)or Cd^(2+)induced the partial dispersion of large Bpy-POP aggregates.Consequently,the fluorescence intensities enhanced dramatically as well as the fluorescence emission shifted to redder region,showing an"ON"state.Combing the fluorescence increasing efficiency and the maximum emission wavelength shift degree together,Zn^(2+)and Cd^(2+)can be selectively discriminated and quantitatively detected,which exhibits a great promising of the present Bpy-POP based method in Zn^(2+)and Cd^(2+)monitoring in real samples.