引潮位展开的不同规格化形式及其转换

在引潮位展开过程中,为使大地系数的数值在不同阶次中保持相对稳定,对其进行规格化处理。从引潮位的基本理论公式出发,在分析缔合勒让德函数及其完全规格化的基础上,给出了引潮位展开中3类不同规格化(Doodson规格化、Cartwright & Tayler规格化、Hartmann & Wenzel规格化)公式的具体形式,得到3者之间的转换关系与转换系数。同时给出Doodson规格化中2~6阶规格化因子的具体数值,指出并改正Doodson、Roosbeek文献和IERS 2003、2010规范中的3处错误。     

中国南方调整水稻种植格局——一种水稻生产预先适应气候变化的选择(英文)

Rice planted in southern China accounts for 94% of the total in sown acreage and 88% of the total in production, which matters a lot to Chinese food security. However, due to the prolonged conflict between water availability and rice growth in spatial/temporal distribu-tion, rice production suffers from seasonal drought at acreage of 16%-22%, which compro-mises food production capacity and food security. Focusing on the spatial distribution of seasonal drought with rice and the practices to adapt to it, and based on an analysis of bal-anced water supply for and demand by rice at a growing season scale during 1981-2030, this paper assesses the changing seasonal drought in the process of rice production under the changing climate in the future, and identifies general rice re-cultivation options for climate change adaptation. Some conclusions can be drawn as follows. (1) Rice suggests a decline in seasonal drought, with early season rice (early rice hereafter) by 12,500 km2, middle season rice (middle rice) by 80,000 km2, and in particular late season rice (late rice) by 25,000 km2, which accounts for almost 20% of its cultivated acreage. It is indicated that due to climate change, seasonal drought in major rice producing areas tends to alleviate in general, late season rice in particular. (2) Future climate change brings about a significant impact on the spatial/temporal distribution of water resources in rice producing areas in China. Based on ’pre-designed’ adaptation actions for rice-re-cultivation, the rice cultivation pattern undergoes a significant alteration between 1981-2000 and 2001-2030. In eastern Guizhou and western Hunan, the pattern of single early plus single dry farming is changed into double cropping. In eastern Hunan, the pattern of dry cropping is changed into single early plus single dry farming. In northern Anhui, the pattern of dry farming cropping is changed into middle rice. All this is aimed at a potential adequate availability of water for rice production in the future. (3) Rice re-cultivation patterns developed in this paper help re-balance water demand and supply for rice growth using the spatial analysis tool to adapt rice growth to the changing water avail-ability from spatial perspective, and come up with rice producer-friendly re-cultivation options in response to climate change.     

丹东、友谊关名称由来

1965年2月13日,新华社发布了一则消息——《辽宁吉林广西更改六个市县等地名》,即辽宁省安东市改名为丹东市、安东县改名为东沟县、盖平县改名为盖县;吉林省辑安县改名为集安县;广西僮（壮）族自治区睦边县改名为那坡县、睦南关改名为友谊关。同年3月,中国分别在丹东市与友谊关举行了隆重的改名仪式。     

从永夏陈四楼煤矿水文地质特征看岩溶陷落柱并不存在

根据区域和矿区地质资料 ,结合岩溶陷落柱的形成地质条件进行认真的分析研究 ,得出了否定的认识 ,对正确认识永夏矿区的水文地质条件 ,有效地开展矿井防治水工作 ,正确指导生产有重要意义。     

西洋东大港水道流速垂线分布研究

对辐射沙洲海域东大港4#站位连续2个潮周期的流速测量资料进行了分析、研究,拟合给出了流速垂线分布关系,并根据实际测量资料确定了该站位6个水层的浑水水流尾流函数项表达式。这些表达式表明浑水水流尾流函数是相对深度和摩阻速度的函数。探讨分析了尾流函数的空间分布和潮周期过程。非恒定流的水流尾流函数项的准确表达,对于揭示含沙水流流速结构及水、沙相影响作用规律将起到启发和推动作用。     

树轮灰度资料采集技术方法简介

通过结合气象行业标准《树木年轮气候研究树轮采样规范》(QX/T90-2008)和WinD-ENDRO 2005树轮图像分系统的多年使用经验,将树木年轮灰度资料采集流程划分为野外采样流程、样本预处理流程、灰度数据获取流程、灰度数据交叉定年流程。通过对灰度资料采集过程中各个流程的讨论,希望可以为将来制订规范的树轮灰度资料采集技术方法提供参考。     

A High-Eccentricity Low-Mass Companion to HD 89744

We present deep Hubble Space Telescope (HST) imaging, as well as ground-based imaging and spectroscopy, of the optical afterglow associated with the long-duration gamma-ray burst GRB 990712 and its host galaxy. The data were obtained 48-123 days after the burst occurred. The magnitudes of the host (R=21.9, V=22.5) and optical afterglow (R=25.4, V=25.8, 47.7 days after the burst) favor a scenario in which the optical light follows a pure power-law decay with an index of alpha approximately -1.0. We find no evidence for a contribution from a supernova like SN 1998bw. This suggests that either there are multiple classes of long-duration gamma-ray bursts or that the peak luminosity of the supernova was more than 1.5 mag fainter than SN 1998bw. The HST images and EFOSC2 spectra indicate that the gamma-ray burst was located in a bright, extended feature (possibly a star-forming region) 1.4 kpc from the nucleus of a 0.2L*B galaxy at z=0.434, possibly a Seyfert 2 galaxy. The late-time afterglow and host galaxy of GRB 990712 bear some resemblance to those of GRB 970508.     

区域重磁资料在地应力分析中的应用初探

本文主要阐述找省区域重磁资料所反映的地应力场的有关证据,进而分析了应力场的性质、作用方向,并对省内地壳形变及其结果——构造形式、有关矿产分布作了粗略的探讨.