基于场景树的笔式用户界面设计

从增加笔式用户界面的可用性和提供自然、方便的交互操作的角度,提出一种使用场景树的界面设计方法,并将该方法用于管理会议系统相关环节,包括会议过程、查询和阅读会议文档、记录等.

日本、华北落叶松幼——成龄相关选择模型及早期选择

为了加速日本、华北落叶松的遗传改良进程，缩短育种周期，本文建立了用于早期选择的年遗传增益最大模型 (MAGG) 和最大未来净值模型 (MFNW)。遗传力平方根比率(g)、幼-成龄遗传相关系统(r) 和遗传预测系数等参数可用8种随时间函数来逼近，根据残差平方和与非线性回归相关指数，以二次抛物线式拟合的精度最高。不同模型利用的评价标准及参数逼近的函数不同，估算的最佳选择年龄 (tmax) 也不同。对于 MFNW模型，tmax的确定受生物学因子和经济学因子的共同影响。估算的结果表明，日本、华北落叶松的早期选择都是有效的。如果轮伐期（T）为20年，考虑改良的性状为材积，对于日本落叶松可用早期的树高作为选择指标，初选在2龄进行，第二次选择在7－8龄，早期选择的相对效率 (RSE) 分别为 14.2037 和 2.5017－1.9378；对于华北落叶松，当用树高作为早期选择指标时，第一次选择在3龄 (RSE=3.1711)，第二次选择在 9－10 (RSE=1.5492－1.4561)，当用树高年生长最作为早期选择指标时，第一次选择在4龄 (RSE=1.1276)，第二次选择在 7－8 (RSE=1.3343－1.3436)。本文对不同轮伐期的tmax和其他性状的早期选择也作了探讨。

洞穴碳酸盐^230Th-^234U-^238U测年初始钍校正的等时线研究

IEECAS SKLLQG

彩色空间变换在DEM与遥感影像复合中的应用研究

非遥感数据与遥感数据复合是提高遥感影像解译精度的重要方法之一。以延河流域1997年TM影像和1∶5万DEM为数据基础,在遥感影像处理软件ERDAS IMAGINE 8.4支撑下,研究了遥感数据与非遥感数据的复合方法。研究表明,利用彩色空间变换能取得较好的效果。把遥感影像从RGB颜色模式通过彩色空间变换变换到IHS颜色模式,利用DEM代替IHS模式的色度(H)分量并通过逆变换变回到RGB模式。变换后各地类间颜色对比度增大,有利于监督分类中分类模板的建立和提高分类精度。

Y_2O_3－Nb_2O_5－B_2O_3：Eu~（3＋）·Bi~（3＋）的燐光体的晶体结构与光谱性质

采用常规固相反应于１２００℃下制备了具有褐钇铌矿结构的Ｙ２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３（Ｙ（０．９３）Ｅｕ（０．０７））２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３和（Ｙ（０．９１）Ｅｕ（０．０７）Ｂｉ０．０２））２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３等光体，研究了它们的发光性质：结果表明，在２６８ｎｍ紫外光激发下，由于ＮｂＯ４基团于４１０ｎｍ处发生１Ｔ→１Ａ１跃迁，致使Ｙ２Ｏ５·Ｎｂ２Ｏ５·Ｂ２Ｏ３呈现更亮的紫外发射。体系中的Ｂ２Ｏ３可降低反应温度，增强ＮｂＯ４和Ｅｕ（３＋）的发光强度。（Ｙ（０．０９１）Ｅｕ（０．０７）Ｂｉ（０．０２））２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３燐光体系中所观察到的ＮｂＯ４→Ｅｕ（３＋）和Ｂｉ（３＋）→Ｅｕ（３＋）的能量传递使红光发射明显增强。

电感耦合等离子体原子发射光谱法直接测定高纯氧化铈中14个稀土杂质的研究

本文研究了电感耦合等离子体原子发射光谱直接测定99.95%氧化铈中14种稀土杂质的方法。讨论了基体线和光带对分析线的干扰及扣除、并加入70％乙醇提高灵敏度,方法简单,再现性好,准确度高,得到了满意的结果。

东海南部流-涡结构分析与动力机制研究

东海作为全球海洋变化中最为敏感的海区之一，其环流变异不仅直接影响东亚和我国的气候，还关系到海区内营养盐的输运和污染物的净化。鉴于东海环流在中国近海环境和海上工程、海洋活动所起的重要作用，其研究是我国海洋工作者工作的重点。 31N以南的东海南部海域是水文调查最为丰富的海域，目前已经积累了超过8 000 000个站点水文数据（温度、盐度）和12 000 000站点流数据（流速、流向），这些数据为该海域的物理海洋学研究提供了坚实的物质基础。本文以东海南部海域的流-涡结构为研究对象，以丰富的观测资料为基础，辅以MASNUM浪-潮-流耦合模式，通过数据分析、模式验证和动力机制分析相结合的方法，明确东海南部海域存在的各个海流系和涡旋结构。 本文研究内容主要包括东海黑潮的流速结构及其时间变化特征、黑潮分支和海温之间的关系、黑潮右侧逆流的季节特征、黑潮左侧逆流的存在性验证、东海黑潮环流子系统的构成、台湾海峡内海流的路径和流量、台湾暖流的水体来源和路径、涡旋和冷（暖）中心的季节分布特征。

Mass spectrometric identification of multihydroxy phenolic compounds in Tibetan herbal medicines

A highly selective and accurate method based on derivatization with dansyl chloride coupled with liquid chromatography-mass spectrometry has been developed for identification of natural pharmacologically active phenolic compounds in extracts of Lomatogonium rotatum plants (Tibetan herbal medicine) obtained by solid-phase extraction. The number of hydroxyl groups on the dansylated phenols was estimated by LC-MS-MS analysis in positive-ion mode. Dansyl derivatization of the compounds introduced basic secondary nitrogen into the phenolic core structures and this was readily ionized when acidic HPLC mobile phases were used. MS fragmentation of the derivatives generated intense protonated molecular ions of m/z [MH](+) (phenol aglycones were transformed into the corresponding free phenols by cleavage of an aglycone bond). Collision-induced dissociation of the protonated molecule generated characteristic product ions of m/z 234 and 171 corresponding to the protonated 5-(dimethylamino)naphthalene sulfoxide and 5 -(dimethylamino) naphthalene moieties, respectively. Selected reaction monitoring based on the m/z [MH](+) to 234 and 171 transitions was highly specific for these phenolic compounds. Characteristic ions with m/z values of [MH - 234](+), [MH 2 x 234](+), and [MH - 3 x 234](+) were of great importance for estimation of the presence of multihydroxyl groups on the phenolic backbone.

巴丹吉林沙漠近40a风沙活动规律浅析

Based on the data of wind from 11 meteorological observation stations in recent 40 years, the paper analyzed the temporal and spatial distribution characteristics of resultant drift potential in the Badain Jaran Desert. The 84 sand samples were collected and analysed from three compound crescentic dunes developped on southeast part of The Badain Jaran Desert. Through the statistics and computation of wind data and the analysis of Grain Size over compound crescentic dunes in The Badain Jaran Desert, this paper analyzed the characteristics of the blown sand activities in in this area. The following viewpoints were obtained: 1　Most parts of The Badain Jaran Desert are dominated by northwest wind and sub－dominated by west wind, while prevailing wind in southeast part of The Badain Jaran Desert is southeast, different froms other places. 2 The Badain Jaran Desert is strongly zoned from its surounding meteorological observation stations. It has impressively high DP and RDP value. Except for Ding Xin Station in medium wind power environment, the left stations are all belongs to high wind－power districts. 3 From the seventies till now, the value of DP and RDP in The Badain Jaran Desert shows a decending trend except for the RDP value of Guai Zihu Station in the north. This trend indicates that the wind power for the moment of The Badain Jaran Desert is far lower than it in the seventies. 4 Adopting sand rose map for classification of wind environments in defferent parts of The Badain Jaran Desert, Ejinaqi is Narrow unimodal wind regimes, Ding xin, Bayinmaodao and Ayouqi districts obtuse bimodal and Guaizihu complex. 5 Resultant drift directions in most parts of the Badain Jaran desert are southeast, which indicates annual net sand in these areas drifted from the northwest to the southeast of the desert, which consists with the analysis results of grain size of predecessors. RDD in Ayouqi staion shows the net sand drifted from the southeast to the northwest in the recent 40 years, which may attribute to the reason that, the Badain Jaran desert lies in the zone influenced by both northwest and southeast wind, the southeast monsoon was strengthened and northwest wind became weaker than a former time. So, if sand mareria is sufficient, there are two different drift directions, namely two sorts of sand source, existed in Badain Jaran desert at least. 6 Based on analysis results of meteorologic data and grain size, blown sand activities is that, in most parts of Badain Jaran desert in the past 40 years, northwest wind transported net sand from the northwest part to the southeast part of The Badain Jaran Desert.And besides this, analysis of collected sand samples also shows that, in the southeast part of Badain Jaran desert, grain size do fined from southeast to northwest. Combining results of meteorologic data in the southeast part, it can infered that southeast monsoon took blown sand to the inner desert from its southeast part.