Research on Credit Mechanism of Electronic Honor Certificate System Based on Blockchain

The problem of dishonesty in the workplace has been one of the serious problems in business management practice for a long time, and this phenomenon is especially obvious in the recruitment link of the talent market. In order to effectively solve the problem of false resumes in the current talent market, based on the investigation and analysis of the reasons for talents\u27 dishonesty, a solution of trusted electronic honor certificate system based on blockchain is proposed, and the effectiveness of the model is verified by using game theory analysis method. Thus, it provides a credit guarantee scheme based on blockchain technology for electronic honor certificates and other archives without official credit guarantee, which overcomes the problems of unilateral way dimension and high labor cost faced by traditional background investigation and provides a new approach for solving the problem of resume fraud in the recruitment scene of the talent market

Relaxed 2-D Principal Component Analysis by LpL_p Norm for Face Recognition

A relaxed two dimensional principal component analysis (R2DPCA) approach is proposed for face recognition. Different to the 2DPCA, 2DPCA-$L_1$ and G2DPCA, the R2DPCA utilizes the label information (if known) of training samples to calculate a relaxation vector and presents a weight to each subset of training data. A new relaxed scatter matrix is defined and the computed projection axes are able to increase the accuracy of face recognition. The optimal $L_p$-norms are selected in a reasonable range. Numerical experiments on practical face databased indicate that the R2DPCA has high generalization ability and can achieve a higher recognition rate than state-of-the-art methods.Comment: 19 pages, 11 figure

CCD photometric study of the W UMa-type binary II CMa in the field of Berkeley 33

The CCD photometric data of the EW-type binary, II CMa, which is a contact star in the field of the middle-aged open cluster Berkeley 33, are presented. The complete R light curve was obtained. In the present paper, using the five CCD epochs of light minimum (three of them are calculated from Mazur et al. (1993)'s data and two from our new data), the orbital period P was revised to 0.22919704 days. The complete R light curve was analyzed by using the 2003 version of W-D (Wilson-Devinney) program. It is found that this is a contact system with a mass ratio $q=0.9$ and a contact factor $f=4.1$. The high mass ratio ($q=0.9$) and the low contact factor ($f=4.1$) indicate that the system just evolved into the marginal contact stage

Tetra­kis[μ-2-(3,4-dimeth­oxy­phen­yl)acetato]-κ3 O 1,O 1′:O 1;κ3 O 1:O 1,O 1′;κ4 O 1:O 1′-bis­{[2-(3,4-dimeth­oxy­phen­yl)acetato-κ2 O 1,O 1′](1,10-phenanthroline-κ2 N,N′)erbium(III)}

In the dimeric centrosymmetric title complex, [Er2(C10H11O4)6(C12H8N2)2], the ErIII ion is nine-coordinated by five 2-(3,4-dimeth­oxy­lphen­yl)acetic acid (DMPA) ligands via seven O atoms and two N atoms from a bis-chelating 1,10-phenanthroline (phen) ligand in a distorted tricapped trigonal-prismatic geometry. The DMPA ligands are coordinated to the ErIII ion in bis-chelate, bridging and bridging tridentate modes. Relatively weak intra­molecular C—H⋯O inter­actions reinforce the stability of the mol­ecular structure. Inter­molecular C—H⋯O inter­actions are also observed

Tris{2-meth­oxy-6-[(4-methyl­phen­yl)iminiometh­yl]phenolate-κ2 O,O′}tris­(thio­cyanato-κN)europium(III)

The metal center in the structure of the title compound, [Eu(NCS)3(C15H15NO2)3], is coordinated by three Schiff base 2-meth­oxy-6-[(4-methyl­phen­yl)iminiometh­yl]phenolate (L) ligands and three independent thio­cyanate ions. In the crystal structure, the acidic H atom is located on the Schiff base N atom and hydrogen bonded to the phenolate O atom. The coordination environment of the EuIII ion is nine-coordinate by three chelating methoxy­phenolate pairs of O atoms and three N-atom terminals of the thio­cyanate ions. The compound is isostructural with the CeIII analogue [Liu et al. (2009 ▶). Acta Cryst. E65, m650]

Tetra­kis[μ-2-(3,4-dimeth­oxy­phen­yl)acetato]-κ4 O:O′;κ3 O,O′:O;κ3 O:O,O′-bis­{[2-(3,4-dimeth­oxy­phen­yl)acetato-κ2 O,O′](1,10-phenanthroline-κ2 N,N′)samarium(III)}

In the centrosymmetric dinuclear title complex, [Sm2(C10H11O4)6(C12H8N2)2], the SmIII ion is nine-coordinated by seven O atoms of five 2-(3,4-dimeth­oxy­phen­yl)acetate (DMPA) ligands and two N atoms of one bis-chelating 1,10-phenanthroline (phen) ligand, forming a distorted tricapped trigonal-prismatic environment. The DMPA ligands coordinate in bis-chelate, bridging and bridging tridentate modes. An intra­molecular C—H⋯O hydrogen bond occurs. Inter­molecular C—H⋯O inter­actions are also present in the crystal

Tris{2-meth­oxy-6-[(4-methyl­phen­yl)iminiometh­yl]phenolato-κ2 O,O′}tris­(thio­cyanato-κN)praseodymium(III) monohydrate

The asymmetric unit of title compound, [Pr(NCS)3(C15H15NO2)3]·H2O, consists of three Schiff base 2-meth­oxy-6-[(4-methyl­phen­yl)imino­meth­yl]phenol (HL) ligands, three independent thio­cyanate anions and an uncoordinated water mol­ecule. The PrIII ion is nine-coordinated. The thio­cyanate anions coordinate to the PrIII ion via the N atoms and the three HL ligands chelate the PrIII ion via the phenoxy and meth­oxy O atoms. The protonated imine N atoms are involved in intra­molecular hydrogen bonds with the phenolate groups