太平街里的“老长沙”和新时尚

原本是奔贾谊故居去的,没想到误闯入长沙的老街——太平街。贾谊故居周一闭馆,吃了个闭门羹之后,正好闲适地逛逛贾谊故居的所在地太平街。如果你要找“老长沙”的味道,以及新时尚的潮流,来太平街准没错。     

济州岛：“东方夏威夷”的浪漫

有人说,是浪漫唯美的韩剧成就了济州岛使之享有“蜜月之岛”、“浪漫之岛”的美称。也有人说,火山岛的独特资源和丰富多样的自然景观造就了济州岛,刚刚入选为“世界新七大自然奇观”即为证。     

制造业的创意品牌

品牌是制造出来的吗？是的。将土地、人员、物料、资金等重新组合生产出一些新的东西,然后起个名字,就有了一个品牌;随着时间推移,这个品牌的口碑越来越好,消费者忠诚越来越深厚,于是这个品牌成了一个强势品牌。从这个意义上说,品牌真的是一砖一瓦制造出来的。此言不虚耳。     

Superconductivity in One-atomic-layer Metal Films

Superconductivity is a peculiar quantum phenomenon which originates from the pairing of conduction electrons, followed by phase coherent condensation. Since the discovery by K. Onnes in 1911, superconductivity has been one of the hottest topics in physics for an entire century, and still attracts people’s great interest. One of the intriguing issues is how     

Studies of Solar Vector Magnetic Field

In this article,we report a few advances in the studies based on the solar vector magnetic field observations which were carried out mainly with the Solar Magnetic Field Telescope at the Huairou Solar Observing Station in the 1990s.(1) We developed necessary methodology and concepts in vector magnetogram analysis(Wang et al.1996).For the first time,we proposed to use the photospheric free magnetic energy to quantify the major flare productivity of solar active regions(ARs),and it had been proved to be the best parameter in representing the major flare activity.(2) We revealed that there was always a dominant sense of magnetic shear in a given AR(Wang 1994),which was taken as the premise of the helicity calculation in ARs;we made the first quantitative estimation of magnetic helicity evolution in ARs(Wang 1996).(3) We identified the first group of evidence of magnetic reconnection in the lower solar atmosphere with vector magnetic field observations and proposed a two-step reconnection flare model to interpret the observed association of flux cancellation and flares(Wang and Shi 1993).Efforts to quantify the major flare productivity of super active regions with vector magnetic field observations have been also taken.     

Solar Coronal Mass Ejection as a Result of Magnetic Helicity Accumulation in the Corona

Coronal mass ejections（CMEs） are a major form of solar activities.A CME takes away 10^15-16 g of plasma from solar low corona,to disturb the near-Earth space if the CME direction is favorable.Here we summarize our understandings and reasoning that lead us to conclude that CMEs are the unavoidable products of magnetic helicity accumulation in the corona.Our study puts the formation of magnetic flux ropes and CME eruptions as natural and unavoidable results of coronal evolution.     

Large Sky Area Multi-Object Fiber Spectroscopic Telescope

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST) is a meridian reflecting Schmidt telescope with a clear aperture of four meters,a focal length of 20 meters and a field of view of five degrees.By using active optics technique to control its reflecting corrector,     

基于供应链中不确定性的生产计划研究

供应链管理环境下的企业,将面临复杂多变的市场环境,信息的多源性、多态性和不确定性,增加了其在供应链环境下制定生产计划的复杂性和难度。论文以全球供应链为研究背景,分析了供应链环境下生产计划信息不确定性的主要根源,从不同角度分析了供应链信息不确定性对生产计划的影响,指出如何通过信息共享机制与弱化信息不确定性等提高生产计划动态响应性的方法。     

基于决策论的河北省钢铁产业信息化趋势研究

本文利用决策论的相关理论分析了河北省钢铁产业在产业升级过程中信息化建设趋势。对各种规模钢铁企业的信息化建设模式提出了建议。     

《森林培育学》课程教学体系的优化探讨

本文主要讨论了沈阳农业大学林学专业《森林培育学》课程设置中存在的一些问题,并针对这些问题,对如何优化教学过程．提高学生的思维能力和实践技能进行了探讨,提出了课程教学体系优化设计的思路：一是要结合所在区域,及时补充森林培育学的新理论、新技术,二是改革教学方式和考核方式,三是要加强实习基地建设,强化教学与实践的同步性。