Introduction Performance of New Labor-saving Grape Variety Miguang in Southern Guangxi and Its Two-harvest-a-year Cultivation Technique

In order to alleviate the difficulty of labor employment for grape cultivation Guangxi,Nanning Comprehensive Experiment Station of China Grape Industry Technology System introduced the labor-saving variety Miguang,made an observation and record of the botanical characteristics,fruit traits,phenology,disease resistance,and yield of the new grape variety.Finally,it summarized the two-harvest-a-year cultivation technique of the labor-saving grape variety Miguang.

Comparative Study on Effect of Ethephon Treatment on Growth of Two Grape Varieties Kyoho and Shine-Muscat

[Objectives]This study aimed to study the effect of ethephon treatment on the growth of two main grape varieties Kyoho and Shine-Muscat.[Methods]Two-year-old Kyoho and Shine-Muscat grape plants transplanted in the film-covered steel-framed greenhouse were used as the test materials.They were pruned horizontally and linearly.In the late growth period,the new shoots were sprayed with ethephon(1500×).During the germination period,10 plants were randomly selected for each variety to investigate the germination situation.Before flowering,20 new shoots with uniform growth were randomly selected for each variety to investigate the growth.During the fruit maturity period,10 clusters of fruits were randomly selected for each variety to determine the related indices of fruit quality.[Results]After the treatment with ethephon,the germination,new shoot growth and fruit quality differed between the two varieties.Overall,the thickness of main stem,main vine and new shoot of Shine-Muscat was greater than that of Kyoho,and the length of new shoot of Kyoho was significantly greater than that of Shine-Muscat.[Conclusions]The growth of Shine-Muscat was more robust.There was little difference in the ear weight of natural fruit setting between the two varieties.Shine-Muscat showed high sugar and low acid contents than Kyoho.

Design of high-performance molybdenum alloys via doping metal oxide and carbide strengthening:A review

Metal oxide and carbide strengthening molybdenum(Mo)alloys have been designed as promising ad-vanced materials in refractory metals to solve some of the core engineering problems in superalloy ap-plications.Hence,there is a need to summarize the results obtained and evaluate the opportunities for preparing high-performance Mo alloys by strengthening metal oxides and carbides to improve the per-formance characteristics of Mo metal materials.This paper reviews the results of the reported work con-cerning the structure and properties of Mo alloys with different metal oxide and carbide strengthening methods added to Mo matrix.The influence of the doping of La 2 O 3 and Y 2 O 3 particles,ceramic Al 2 O 3 and ZrO 2 particles,and refractory TiC and ZrC carbides particles of Mo alloys are discussed.The impacts of particle morphology,size,distribution and volume fractions of oxide and carbide are analyzed,as well as the specific features of different doping techniques for obtaining high-performance Mo alloys mate-rials.This work will guide future research on the design of high-performance refractory Mo alloys by adding oxides and carbide particles,helping to solve the core issues in the field of superalloy application research.

Adsorption and diffusion of oxygen on metal surfaces studied by first-principle study:A review

First-principle calculations,especially by the density functio nal theory(DFT),is used to study the structure and properties of oxygen/metal interfaces.Adsorption of oxygen molecules or atoms on metal surfaces plays a key role in surface science and technology.This review is dedicated to the adsorption of oxygen molecules or atoms on metal surfaces and diffusion behavior from first-principle investigation.We hope that this review can provide some useful contributions to understa nd the study of adsorption properties and diffusion behavior on a metal surface at an atomic-scale,especially for those interested in catalytic oxidation and application of corrosion.

A Shifted-Inverse Adaptive Multigrid Method for the Elastic Eigenvalue Problem

A shifted-inverse iteration is proposed for the finite element discretization of the elastic eigenvalue problem.The method integrates the multigrid scheme and adaptive algorithm to achieve high efficiency and accuracy.Error estimates and optimal convergence for the proposed method are proved.Numerical examples show that the proposed method inherits the advantages of both ingredients and can compute low regularity eigenfunctions effectively.

NEW ERROR ESTIMATES FOR LINEAR TRIANGLE FINITE ELEMENTS IN THE STEKLOV EIGENVALUE PROBLEM

This paper is concerned with the finite elements approximation for the Steklov eigen- value problem on concave polygonal domain. We make full use of the regularity estimate and the characteristic of edge average interpolation operator of nonconforming Crouzeix- Raviart element, and prove a new and optimal error estimate in ｜｜ ｜｜o,δΩ for the eigenfunc- tion of linear conforming finite element and the nonconforming Crouzeix-Raviart element. Finally, we present some numerical results to support the theoretical analysis.