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The mid-infrared (MIR) band entangled photon source is vital for the next generation of quantum communication, quantum imaging, and quantum sensing. However, the current entangled states are mainly prepared in visible or near-infrared bands. It is still lack of high-quality entangled photon sources in the MIR band. In this work, we optimize the poling sequence of lithium niobate to prepare two kinds of typical entangled states, the Hermit-Gaussian state and the comb-like entangled state at 3.2 $\mu$m. We have also calculated the photon pair rates and estimated the effect of fabrication resolution in the schemes. Our approach will provide entangled photon sources with excellent performance for the study of quantum information in the MIR band., Comment: 9 pages,4 figures

To investigate the swimming ability of two为探究雅砻江两种裂腹鱼的游泳能力,给过鱼设施设计和鱼类游泳行为学研究提供基础参数,本研究采用递增流速法对长丝裂腹鱼、齐口裂腹鱼的感应流速、临界游泳速度、突进游泳速度进行测试,采用固定流速法对长丝裂腹鱼的耐久游泳速度进行测试。结果表明: 长丝裂腹鱼与齐口裂腹鱼的感应流速随着体长的增加均出现了先增加后平稳的趋势,但最大感应流速均小于0.2 m·s

A control scheme named the variable-lateral-force cavitator, which is focused on the control of lift force, drag force and lateral forces for underwater supercavity vehicles was proposed, and the supercavitating flow around the cavitator was investigated numerically using the mixture multiphase flow model. It is verified that the forces of pitching, yawing, drag and lift, as well as the supercavity size of the underwater vehicle can be effectively regulated through the movements of the control element of the variable-lateral-force cavitator in the radial and circumferential directions. In addition, if the control element on either side protrudes to a height of 5% of the diameter of the front cavitator, an amount of forces of pitching and yawing equivalent to 30% of the drag force will be produced, and the supercavity section appears concave inwards simultaneously. It is also found that both the drag force and lift force of the variable-lateral-force cavitator decline as the angle of attack increases.

The article is on the preparation of metallic luster glaze based on metallic oxide: CuO-MnO2-TiO2-V2O5 as the nucleation agent in the basic glaze of lead frit. Through the study on process factors such as: glaze formula, additive content, firing system as well as the modern testing instrument: XRD and SEM, the experimental results show that the optimum formula is: the mass ratio of Mn/Cu is 4, TiO2, NiO is respectively 20% and 3.5%. The composition of the frit and its content affect glaze surface luster, the mass ratio of Mn, Cu and its additive total amount, the content of Ti, ViO also affects the tone of metal luster and its crystallization degree.

Based on the research of the split-phase glaze in the CaO-SiO2-P2O5 series ,this thesis analyzes and discusses the effects of glaze’s formula and firing condition on the making of iron-red fancy glaze, and then comes to an scientific way to make bright-coloured iron-red fancy glaze with homogeneously-distributed crystalline under a wide range of temperature.

Fish gills is part of the first-line defense in fish. The proteome in gill mucus of grass carp (Ctenopharyngodon idella) was examined in this study. Two-dimensional polyacrylamide gel electrophoresis, in combination with size exclusion chromatography, was used to resolve the proteins. Two-dimensional maps of gill mucus revealed 406 distinct spots with Coomassie blue staining, of which 256 protein spots were subjected to identification using matrix-assisted laser desorption / ionization time-of-flight (MALDI-TOF), matrix-assisted laser desorption / ionization tandem mass spectrometry (MALDI-MS / MS) and liquid chromatography tandem mass spectrometry (LC-MS / MS). A total of 99 spots representing 52 proteins were identified, including 19 immune-related molecules such as lectin, interlectin, transferrin, and proteasome. Their presence in gill mucus may imply the importance of non-specific immunity in gill mucus. The present study provides the first picture on proteome in mucus of a fish species, and thus the foundation for understanding quantitative and qualitative variation in proteins in the mucus.

In this paper, Steady-flow Integration Approach (SIA) and Volume of Fluid (VOF) method are both used to calculate the filling time of a ship lock. The values of filling time derived from these two different methods have the same order of magnitude. SIA is only used to give a quick but coarse estimation; however in the application of more time-consuming VOF approach, the fluctuations of water surface are additionally considered and computed, It provides a more precise estimation of the filling time and a more realizable details about the filling process. In practical engineering, the geometry of ship lock will be far more complex than here; the SIA is not enough to satisfy the demands for a desired design. The VOF method will be a nice choice and give reasonable predictions of filling time, water fluctuations and velocity fields in the ship lock.

The subject is mainly about making metallic lustre glaze at a low temperature with the basic glaze of lead frit and the nucleation agent of metallic oxides of CuO-MnO2-TiO2-NiO. It makes a study on the effect on the metallic lustre glaze through observing the process factors like the formula of glaze, the content of additive, the thickness of the glaze and the firing system. The results show that the optimum formula is Mn and Cu,The mass ratio of TiO2 ,NiO and CeO2 is respectively 4, 16%, 4.5% and 4.5%.