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Preparation and Property of Antibacterial Nucleus with the Combination of Nano-Silver and Antibiotics Jie SUNa, Le-Xin ZHOUb, Xiao-Hong LIc and Ming XIAd,* School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou, China, 310053 ajaycee_eliauk8@foxmail.com, b1161145722@qq.com, c41354419@qq.com, dxia1ming2@126.com *Corresponding Author Keywords: Antibacterial, Pearl nucleus, Pearl culture, Orthogonal experiment.
Material and Instruments Samples.
Acknowledgments This paper is funded by Zhejiang Basic Non-profit Program (LGN19C190004), from Zhejiang Provincial Department of Science and Technology.
References [1] Liang FL, Xie SH and Lin WC 2015 Transactions of Oceanology and Limnology 115-120 [2] Liang FL, Wang QG and Deng YW 2015 J Zhanjiang Ocean Univ 35(4) 51-55 [3] Xie SH, Deng YW and Fu S 2013 Zhanjiang Ocean Univ 33(6) 37-41 [4] Xie SH, Liang FL and Fu S 2013 Chinese Agricultural Science Bulletin 29(2) 31-35 [5] Wang QG, Xie SH and Deng YW 2018 Journal of Aquaculture 39(4) 50-53 [6] Li AH 2001 Microbiology China 28(1) 58-63 [7] Chen HH, Tu CL and Tang Y 2017 Journal of Fisheries of China 41(11) 1766-78 [8] Xu XJ, Li XH and Ma YF 2019 Journal of Fisheries of China 43(5) 1338-45 [9] Wang SQ, Wu QC and Li ZQ A breeding method of colored negative ion pearls[P] China CN104855315A 2015-8-26 [10] Xu P, Ai KT and Zhou JW 2016 Journal of Yangtze University (Natural Science Edition) 13(09) 26-28+37

Journal of Hydrology.
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In terms of materials for sensor, actuator and transducer applications, poly(vinylidene fluoride) (PVDF) based polymers have played an important role.
PVDF can be used as structural materials as well since it has excellent water resistance, corrosion resistance and chemical stability.
The compressive strain-stress relations of the samples were measured by a compression testing machine (Materials Testing, ZWICK Z2.5TH) at a constant compressive strain rate 0.02 min-1.
Lanceros-Mendez, Dynamic Mechanical Analysis and Creep Behaviour of β-PVDF Films, Materials Science and Engineering: A 370(1-2), 336-340(2004) [10]A.
De Batist, Low Temperature Internal Friction on g-irradiated Polyvinylidene Fluoride (PVDF), Journal of Materials Science 13(9), 1887-1990(1978) [11] S.

Small particle size powder of Fe and Ni was used as raw materials (the particle diameter of metal injection molding (MIM) was 0.5-20μm generally) [1], and the wax-based polymer was used as binder, a new type of Fe-Ni alloy for semiconductor was prepared by the MIM.
The uniformity of feedstock directly affects subsequent processing steps as well as properties of materials.
We mixed the material at the temperature of 175℃.
Ordnance Material Science and Engineering.
Journal of Functional Materials.

Nano-sized β-tricalcium phosphate (nano-sized β-TCP) was synthesized by dialysis process using Ca(NO3)2·4H2O and (NH4)2HPO4 as starting materials.
Introduction β-tricalcium phosphate(β-TCP) has been proved to be attractive materials for biological applications due to its excellent bioactivity and bioresorbability [1].
Materials and Methods Materials.
Laborde: Materials Chemistry and Physics 80(2003), 269-277 [4] N.C. van de Merbel: Journal of Chromatography A Vol. 856(1999), p. 57 [5] S.M.
Chen: Key Engineering Materials Vols. 309-311(1999), p.577-580 [6] Anna Slosarczyk , Jan Piekarczyk: Ceramics International 25(1999), 561-565 [7] S.Raynaud, E.Champion, D.Bernache-Assollant, P.Thomas: Biomaterials 23(2003), 1065-1072 [8] Jong-Shing Bow, Sz-Chian Liou, San-Yuan Chen: Biomaterials 25(2004), 3155-3161

The Aluminum Brazing Pieces of Mechanical Performance based on GRNN Neural Network Xinghua Liang1, a, Lin Shi1, b, Yusi Liu1, c, Xiaoming Hua1, d Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou, China ae-mail:lxh304@yahoo.com.cn,be-mail:574558568@qq.com, ce-mail:liuyusi89@163.com,de-mail:captainhua@gmail.com Keywords: Aluminum brazing pieces, GRNN neural network, Orthogonal experiment, Mechanical performance Abstract.
In this thesis,LF21 aluminum alloy brazing materials were designed and prepared by Orthogonal experiment,and mechanical properties of the brazing specimen was tested.
Based on the GRNN(Generalized Regression Neural Network),Nonlinear relationship modle of brazing material preparation parameters and mechanical properties of the weldment was established.The results show that the model has better stability.When smooth factor value is 0.1,the network approximation error and prediction error absolute value is 0.01%.It can be realized that an nonliner mapping between the aluminum alloy brazing preparation parameters and solder joint tensil strenth based on the Orthogonal test and can do better prediction of the weld mechanical properties,according to brazing material preparation parameters.
,which are widely used in automobiles,high-speed railway vehicle, aerospace and military industries [1,2].Due to its unique physical and chemical properties,the aluminum alloy can get poor solderability and not solder easily.Brazing alloy as an important way to connect with,has the feather of small size brazing deformation and high precision.So in recent years,it has been extensively used by China's automobile industry.Aluminum brazing quality associated with the solder material (flux),the quality of performance of the aluminum brazing flux largely determined by the preparation process[3].Therefore, preparation of aluminum brazing flux is closely related to the solder pieces tensile strength,if we can build the model of the process parameters and weldment tensile strength relational,process parameters can be predicted from the weldment tensile strength,can also be optimized the process parameter maximum tensile strength of the weldment.Because the relationship between process parameters
Chinese Journal of Nonferrous Metals, 2010,20 (9) :38-42 [3] Jinxia, Hulan Wei, Xu Baisheng etc. fluoroaluminate aluminum brazing flux research status and development trend [J].

Fig.2 installation of steel meshes Table 1 Parameters of test beams and mechanical properties of materials Specimen No.
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Peng, et al: Journal of Building Structures, Vol. 24(6), 2003, p. 87-91
Lu: Journal of Railway Science and Engineering, Vol. 4(5), 2007, p. 22-27

Young's modulus E of a damaged material is expressed as, E = E*(1 - Ω), (5) where Young's modulus E* is that of an intact material.
Ohtsu: Acoustic Emission Characteristics in Concrete and Diagnostic Applications, Journal of AE, Vol. 6, No. 2, 1987, 99-108
Ono: A Generalized Theory of Acoustic Emission and Green's Functions in a Half Space, Journal of AE, Vol. 3, No. 1, 1984, 124-133
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AE from Composite Materials, ASNT, 1992, 132-138

Materials and methods Chemicals Progesterone (1) was purchased from Yancheng Xinyi Pharm&Chem Co., Ltd, Yancheng, China).
Murray, Journal of the American Chemical Society Vol. 74 (1952), p. 1871 [2] M.
Iida, Journal of Fermentation and Bioengineering Vol. 67 (1989), p. 238 [10] J.
Schneide, Journal of Steroid Biochemistry and Molecular Biology Vol. 5 (1974), p. 9 [11] S.
Morris, Journal of Chemical Research-S Vol. 6(1989), p. 164 [15] M.

Currently, for the design of SMA13 mixture, using VCA（The voids in the Coarse Aggregate）,the fixing voids in coarse aggregate which above 4.75mm as the measure of aggregate interlocking effect, and demanded the compacted mixture’s VCAmix (The VCA in the Mixes)< VCADRC(The VCA in the Dry Rodded Condition) [4][5]. 1 Material and method 1.1 Material Choose the basalt from Zhenjiang maodi and the AK-70# base asphalt as the experimental materials.
Journal of Southwest Jiaotong University. 2002,37(1):14-18.
Journal of Zhengzhou University ( Engineering Science). 2010,31(4):2-5.
(In Chinese) [3] Yuzhi Li,Qun Chen,Zhaohui Liu.Journal of China & Foreign Highway. 2003,23(1):82-85.
(In Chinese) [9] Yonggui Lu,Dengxi Zhang.Journal of Xi’an Highway University.2001,21(1):33-36.