Quality Enhancement of Physical Education in Chinese Universities from the Perspective of the Supply-side Structural Reform

The overall characteristics of higher education in China have been transformed from extensible development to connotative development, which is consistent with the core content of improving quality and effect in the strategy of supply-side structural reform. In response to the current dilemma of the supply-side output of physical education in Chinese universities, it calls for a balance between the demand and supply for higher physical education. In terms of exploring factors that contribute to a high-quality education system from the perspective of supply-side structural reform, the supplier, the content, the mode, and the conditions of the supply side is supposed to be optimized by improving the teaching abilities of the leading suppliers, optimizing the output of the supply content, facilitating a collaborative supply model, and expanding the online supply field. Accordingly, the coordinated and unified development of the supply and demand of physical education for college students can be promoted, to enhance the quality of physical education in Chinese universities

A Filter Algorithm with Inexact Line Search

A filter algorithm with inexact line search is proposed for solving nonlinear programming problems. The filter is constructed by employing the norm of the gradient of the Lagrangian function to the infeasibility measure. Transition to superlinear local convergence is showed for the proposed filter algorithm without second-order correction. Under mild conditions, the global convergence can also be derived. Numerical experiments show the efficiency of the algorithm

Effect of Al-10Sr on microstructure and fracture toughness at room temperature of Nb- Si-Ti alloys

With the development of the aero-engine performance to a higher thrust- weight ratio, Nb-Si system ultra-high temperature alloy has been considered as a very promising material to replace Ni base superalloys in the service temperature range over 1350℃. In this paper, the effect of Al-Sr addition on the microstructure and fracture toughness of Nb-Si-Ti alloys was studied. Microstructure of the alloys was observed by scanning electron microscope, and their phase compositions were analyzed with X-ray diffraction and Electro-Probe micro-analyzer. And the room temperature fracture toughness was measured. The results indicated that the phases of Nbss and Nb3Si were presented in Nb-Si-Ti alloys. However, with the Al-10Sr addition, the alloys were composed of Nbss and β-Nb5Si3 phases. Compared with the Nb-Si-Ti alloys, the value of room temperature fracture toughness increased dramatically with the addition of Al-10Sr alloy. The relationship between the microstructure and the fracture toughness was discussed

Village Housing: Constraints and opportunities in rural England

Village Housing explores the housing challenge faced by England’s amenity villages, rooted in post-war counter-urbanisation and a rising tide of investment demand for rural homes. It tracks solutions to date and considers what further actions might be taken to increase the equity of housing outcomes and thereby support rural economies and alternate rural futures. Examining past, current and future intervention, the book’s authors analyse three major themes; the interwar reliance on landowners to provide tied housing and post-war diversification of responses to rising housing access difficulties (including from the public and third sectors); recent responses that are community-led or rely on flexibilities in the planning system; and actions that disrupt established production processes including self-build, low impact development and a re-emergence of council provision. These responses to the village housing challenge are set against a broader backdrop of structural constraint – rooted in a planning-land-tax-finance nexus – and opportunities, through reform, to reduce that constraint. Village Housing makes the case for planning, land and tax reforms that can broader the social inclusivity and diversity of villages, supporting their economic function and allowing them to play their part in post-carbon rural futures. It aims to contribute greater understanding of the village housing problem – framed by the wider cost crisis afflicting advanced economies – and offer glimpses of alternative relationships with planning and land

Developing Nb-Si based ultra-high temperature materials in BIAM

Nb-Si based materials have the attractive characters such as of higher melting points(＞1750℃), relatively lower densities(6.6-7.2g/cm2) and excellent high-temperature strength in comparison with Ni based superalloys, which are greatly potential to serve in the condition with the temperature range of 1200~1400℃ as a family of ultrahigh temperature structural materials to replace Ni base superalloy. However, , there are three challenges to the application of Nb-Si based materials, including the balance of mechanical properties, the manufacturing processing and the high temperature oxidation resistance. In Beijing Institute of Aeronautical Materials, the research about optimizing chemical composition, ultrahigh temperature heat-treatment and developing special manufacturing processing have been carried out. The results showed that the V and rare metal is able to increase the room temperature toughness of Nb-Si based materials. And the addition of Cr and V are beneficial to the oxidation resistance properties, which will decreased the average oxidation rate and the spallation of oxide scale. After heat-treated at 1600℃/20h, the microstructure of Nb-Si based Materials is finer and the rupture strength at room temperature and 700℃ were raised. With the directional solidification method (DS), the materials with directional solidified microstructures are obtained and with selected laser melting method (SLM), the materials with uniform fine microstructures. The maximum value of tensile strength at 1250℃ was ~190MPa at 0.2 mm/min solidification rate. The room temperature fracture toughness and ductile are improved by SLM. Especially, the ceramic shell for the investment casting of Nb-Si based materials are manufactured successfully, which service temperature is over 300℃ higher than the conventional ceramic shell for Ni-based superalloys. Based on the ceramic shell, the simulated turbine blades with fine microstructure and without inner defects have been prepared at 2000℃

Village Housing

Village Housing explores the housing challenge faced by England’s amenity villages, rooted in post-war counter-urbanisation and a rising tide of investment demand for rural homes. It tracks solutions to date and considers what further actions might be taken to increase the equity of housing outcomes and thereby support rural economies and alternate rural futures. Examining past, current and future intervention, the book’s authors look firstly at the interwar reliance on landowners to provide tied housing and post-war diversification of responses to rising housing access difficulties, including from the public and third sectors; secondly, at recent responses that are community-led or rely on flexibilities in the planning system; and thirdly, at actions that disrupt established production processes: self-build, low impact development and a re-emergence of council provision. These responses to the village housing challenge are set against a broader backcloth of structural constraint – rooted in a planning-land-tax-finance nexus – and opportunities, through reform, to reduce that constraint. Village Housing makes the case for planning, land and tax reforms that can broader the social inclusivity and diversity of villages, supporting their economic function and allowing them to play their part in post-carbon rural futures. It aims to contribute greater understanding of the village housing problem – framed by the wider cost crisis afflicting advanced economies – and offer glimpses of alternative relationships with planning and land

(E)-1-(4-Meth­oxy­phen­yl)-3-(2,4,6-trimeth­oxy­phen­yl)prop-2-en-1-one

In the title compound, C19H20O5, the dihedral angle between the two aromatic rings is 18.23 (4)°. The crystal structure exhibits only weak C—H⋯π and C—H⋯O contacts between the mol­ecules