Two protocols for transmitting an unknown single-photon state and an unknown non-maximally entangled EPR state are presented by using the quantum channel of three-phonton GHZ (Greenberger-Horne-Zeilinger) state, which can be realized with unitary success probability when collective noise is taken into account. The protocols can also be generalized to transmit multi-photon state or to realize quantum communication in collective noise channel.

We study the spin-dependent transport through a one-dimensional quantum ring with taking both the Rashba spin-orbit coupling (RSOC) and ferromagnetic leads into consideration. The linear conductance is obtained by the Green's function method. We find that due to the quantum interference effect arising from the RSOC-induced spin precession phase and the difference in travelling phase between the two arms of the ring, the conductance becomes spin-polarized even in the antiparallel magnetic configuration of the two leads, which is different from the case in single conduction channel system. The linear conductance, the spin polarization and the tunnel magnetoresistance are periodic functions of the two phases, and can be efficiently tuned by the structure parameters.

The rapid development of the new generation of information intelligence technology is closely related to people's life,work and other social activities.The ubiquitous power Internet of Things is a complex multi-network flow system,with the power system as the core,composed of communication network,cloud platform technology,intelligent terminal sensor and artificial intelligence;characteristics are open sharing,ubiquitous connection,holographic perception,fusion innovation.With the development of the energy Internet,the power system is required to fully perceive and widely interconnect massive data and propose the concept,which will become a new idea for the development of information sharing networks in the field of energy Internet power.New mode.Mobile intelligent terminals are important access devices for ubiquitous power Internet of Things and play an important role in mobile operations;mobile smart terminals face more security risks.In the context of ubiquitous power Internet of Things,it is of great significance to analyze the problems existing in the security protection of mobile intelligent terminals and explore the security protection technology of mobile intelligent terminals.

Abstract This paper studies the impact of time and personnel on measurements of hygric properties. Vacuum saturation, capillary absorption, vapor diffusion and static gravimetric tests have been done twice on calcium silicate and autoclaved aerated concrete, first in 2013 and again in 2016-2017. All these tests have also been performed by two different operators on ceramic brick. Results show that the impact of time is very limited, and that different operators also give very similar results, except for the vapor resistance factor, which is sensitive to varied sealing and data processing methods.

Nattokinase (Subtilisin NAT, NK) is a bacterial serine protease with high fibrinolytic activity. To probe their roles on protease activity and substrate specificity, three residues of S3 site (Gly(100), Ser(101) and Leu(126)) were mutated by site-directed mutagenesis. Kinetics parameters of 20 mutants were measured using tetrapeptides as substrates, and their fibrinolytic activities were determined by fibrin plate method. Results of mutation analysis showed that Gly(100) and Ser(101) had reverse steric and electrostatic effects. Residues with bulky or positively charged side chains at position 100 decreased the substrate binding and catalytic activity drastically, while residues with the same characters at position 101 could obviously enhance protease and fibrinolytic activity of NK. Mutation of Leu(126) might impair the structure of the active cleft and drastically decreased the activity of NK. Kinetics studies of the mutants showed that S3 residues were crucial to keep protease activity while they moderately affected substrate specificity of NK. The present study provided some original insight into the P3-S3 interaction in NK and other subtilisins, as well as showed successful protein engineering cases to improve NK as a potential therapeutic agent.

To achieve the highest possible turbine inlet temperature requires to accurately measuring the turbine blade temperature. If the temperature of blade frequent beyond the design limits, it will seriously reduce the service life. The problem for the accuracy of the temperature measurement includes the value of the target surface emissivity is unknown and the emissivity model is variability and the thermal radiation of the high temperature environment. In this paper, the multi-spectral pyrometer is designed provided mainly for range 500-1000degC, and present a model corrected in terms of the error due to the reflected radiation only base on the turbine geometry and the physical properties of the material. Under different working conditions, the method can reduce the measurement error from the reflect radiation of vanes, make measurement closer to the actual temperature of the blade and calculating the corresponding model through genetic algorithm. The experiment shows that this method has higher accuracy measurements.

P-type conduction is a great challenge for the full utilization of ZnO due to low dopant solubility and high acceptor ionization energy. We investigate formation energies and transition levels of the defect complex mAl(Zn) - nN(O) in ZnO by the first principles. The formation and ionization energies for isolated NO in ZnO are 1.17 eV and 0.439 eV, respectively. Among all complexes investigated here, formation and ionization energies of the complex Al(Zn) - 2N(O) can be reduced to 0.632 eV and 0.292 eV, respectively, which indicates that the defect complex is a relative better candidate for p-type ZnO. However, the results calculated from density of states show that 4Al(Zn) - N(O) doped ZnO takes on n-type conduction.

Highlights • Changing the optical window size affects temperature measurement error. • Errors can be minimized by selecting spectral lines outside absorption bands. • The proposed approach was tested under a variety of turbine operating conditions. • Temperature measurement error was significantly reduced using the proposed method. Abstract High temperature is the main focus in ongoing development of gas turbines. With increasing turbine inlet temperature, turbine blades undergo complex thermal and structural loading subjecting them to large thermal gradients and, consequently, severe thermal stresses and strain. In order to improve the reliability, safety, and service life of blades, accurate measurement of turbine blade temperature is necessary. A gas turbine can generate high-temperature and high-pressure gas that interferes greatly with radiation from turbine blades. In addition, if the gas along the optical path is not completely transparent, blade temperature measurement is subject to significant measurement error in the gas absorption spectrum. In this study, we analyze gas turbine combustion gases using the κ -distribution method combined with the HITEMP and HITRAN databases to calculate the transmission and emissivity of mixed gases. We propose spectral window methods to analyze the radiation characteristics of high-temperature gas under different spectral ranges, which can be used to select the wavelengths used in multispectral temperature measurement on turbine blades and estimate measurement error in the part of the spectrum with smaller influence (transmission > 0.98).