On biogeomorphology of Luhuitou fringing reef of Sanya City, Hainan Island, China

Based on comprehensive survey of 6 transects on Luhuitou fringing reef in Sanya City of Hainan Island, China, some features of its biogeomorphologic processes were found, including ( i ) three basic biogeomorphologic units: inner reef flat, outer reef flat and reef slope; (ii) two important biogeomorphologic boundary lines: up limit for live flat coral growing between inner and outer reef flats is Mean Lower Low Water of tropic tide ± 15 cm; the break in slope between reef flat and reef slope is Theoretical Lowest Tide±15 cm; (iii) three types of reef flat profiles in response to distinctive Holocene sea level changes and dynamic condition: Luhuitou type responds to falling sea level and low wave energy; Xiaodonghai type to falling sea sevel and high wave energy; type for atolls of Nansha Islands to stable sea level and low wave energy; (iv) hermatypic coral community is the most essential member in coral reef ecosystem and plays the most important role in biogeomorphologic process. Over the past 30 years Luhuitou fringing reef was severely destroyed by human activities, its biogeomorphologic function severely weakened, and it needs urgent management and protection.     

CPR1000核岛主管道自动焊效益分析

该文通过介绍核电站主管道窄间隙自动焊工艺的开发和主设备及主管道安装焊接逻辑优化,并成功在CPR1000项目上实施成果,系统的分析CPR1000核岛主管道自动焊实施对核电站主管道焊接质量的进一步提高,焊接工期的进一步优化,以及核电站建造成本的进一步降低起到积极的贡献:采用自动焊工艺,单道焊缝焊接工期将相对手工焊缩短15～20 d,核岛安装关健路径工期将由此缩短30～45 d,由此带来商运提前直接经济效益近2亿元.中国改进型百万千瓦级核电站主管道自动焊的成熟应用,也将为我国后续自主完成三代AP1000及EPR堆型自动焊技术提供强有力技术准备.     

海南岛的药用真菌I

海南岛药用真菌种类资源丰富,作者在搜集了的药用真菌标本和素材以后,予以研究鉴定、整理出海南岛药用真菌59种,并对其药用状况进行了简述。     

海南岛园林分类研究

综合园林行业的分类标准与海南岛园林的特色,将海南岛园林分为热带自然风景园、热带野生动物园、度假休闲园、城市生活园、文化史迹园和其他园林6个大类,在大类下再细分为18个中类和29个小类,并将其绘制成完整的分类表,这为本岛园林的纵向发展与横向比较提供了较直接的帮助,也为规范园林行业的分类提供了借鉴.     

哈尔滨太阳岛月亮湾景区土壤的理化性质

以哈尔滨市太阳岛月亮湾景区内土壤为研究对象,分析开发建设对其理化性质的影响。结果表明:由于人为践踏压实,景区内土壤的通气性不好,持水量小,保水和保肥性差。土壤有机质含量处于2级水平,全氮含量处于4级水平,全磷含量最高处于5级水平。除乔木林地土壤的有机质含量基本正常外,土壤的有机质、全氮和全磷含量明显下降,均低于松花江地区土壤表层的平均含量,影响土壤的物理、化学和生物学活性,降低土壤的供氮能力和不断补充有效磷的可能性。各项指标的变异程度中等,相关性不十分显著。该研究为景区的生态研究、环境保护提供了依据。     

庆历名臣王素生平事迹考述--三槐王氏人物考之五

王素是庆历年间(1040-1048年)的著名谏官,在此后的仕途上,更是对国家的建设和稳定,做出了很大的贡献。对王素的生平事迹进行梳理,以期了解王素对时代的影响。     

Substrate-mediated interactions on solid surfaces: theory, experiment, and consequences for thin-film morphology

When two or more atoms bind to a solid surface, the substrate can mediate an interaction between them. In this review, we discuss the origins of this interaction and the theories that describe substrate-mediated interactions, including recent studies with electronic density-functional theory. We summarize the results of experimental studies, in particular those with scanning–tunneling microscopy, aimed at quantifying substrate-mediated interactions. Over the intermediate range, these interactions can be strong enough to influence the ordering of adsorbates at surfaces. We discuss the results of recent studies, employing kinetic Monte Carlo simulations that probe the ramifications of these interactions for the morphology in thin-film epitaxy.     

海坛岛现实净第一生产力的估算：平潭地理信息系统应用之一

本文提出了在地理信息系统下的现实净第一生产力估算模型，并应用该模型进行海坛岛现实净第一生产力估算和生产力分布图的编制．研究结果表明，传统的野外实测与地理信息系统技术的紧密结合为土地生产力的分析与估算提供了有效的途径。     

海南岛东北部地区发展芒果生产问题初探

本文在调查研究的基础上,阐明芒果是见效快、效益高、结果期长的热带经济作物,以大量资料分析了海南岛东北部地区发展芒果生产的现状、有利条件和存在问题,论证了该地区种植芒果是可行的,并提出了具体建议。     

Insulator-metal transition in a conservative system: An evidence for mobility coalescence in island silver films

Aging, which manifests itself as an irreversible increase in electrical resistance in island metal films is of considerable interest from both academic as well as applications point of view. Aging is attributed to various causes, oxidation of islands and mobility of islands followed by coalescence (mobility coalescence) being the main contenders. The effect of parameters like substrate temperature, substrate cleaning, residual gases in the vacuum chamber, ultrasonic vibration of the substrate, suggest that the mobility coalescence is responsible for the aging in island metal films. Electron microscopy studies show evidence for mobility of islands at high substrate temperatures. The comparison of aging data of island silver films deposited on glass substrates in ultra high vacuum and high vacuum suggests that the oxidation of islands, as being responsible for aging in these films, can be ruled out. Further, under certain conditions of deposition, island silver films exhibit a dramatic and drastic fall in electrical resistance, marking the insulator-metal transition. This interesting transition observed in a conservative system — after the stoppage of deposition of the film — is a clear evidence for mobility coalescence of islands even at room temperature. The sudden fall in resistance is preceded by fluctuations in resistance with time and the fluctuations are attributed to the making and breaking of the percolation path in the film.