长江三角洲地区经济改革与城市发展

随着我国的改革开放,经济繁荣,长江三角洲地区逐步成为国家建设的重点区域,特别是90年代以来。在过去的几年中,这个地区已进入了一个新的快速发展阶段,并将在全国范围内进一步发挥其举足轻重的作用。根据国家经济发展战略决策,长江三角洲地区的经济发展现状和发展趋势,到2000年,这个区域可望成为一个现代化地区。为了区域的现代化,城市规划应适应社会主义市场经济的发展。由于传统的主体规划以计划经济体制为基础,因此,我们在城市规划中要来个转变,重组方法和内容,再建新的法规。     

穆珠朗玛峰地区土壤中稀土元素的含量和分布

本文论述了珠穆朗玛峯地区土壤中稀土元素的含量,以及它们在土壤中的分布模式,并发现土壤中稀土元素的含量水平在很大程度上受土壤母质的制约。     

竺可桢与我国自然资源研究

竺可桢同志做为中国科学院副院长于1956年兼任我院综合考察委员会的第一任主任,我们就一直在他所领导的考察队中工作,倍受他的关怀与教益。他是我国自然资源综合考察的奠基人,在他的领导与指导下,开拓了自然资源研究这一新兴的科学园地。值此纪念竺老诞生九十四周年和他离开我们十周年的时候,更加缅怀他为发展我国自然资源科学研究方面的杰出贡献。激励我们要更好地继承和发展他的科学思想,为使我国丰富的自然资源与多采的自然条件在四个现代化建设中发挥更大作用,做出我们应有的贡献。     

Oscillation, Nutation and Wobble of an Elliptical Rotating Earth with Liquid Outer Core

We have constructed a general first-order theory describing those small oscillations of a rotating elliptical earth that are affected by the presence of a liquid outer core. The theory is applicable to free core oscillations and earth tides. Care has been taken to include the effects of the wobble or nutation due to the rotation of the outer core relative to the solid earth. On the basis of the theory the free spheroidal modes of degree 2 and order 1 have been investigated. We have searched for and listed undertones with periods less than 28 hr. No upper limit to the eigenperiods has been detected. It is shown that stable, unstable and neutral polytropic cores are capable of free oscillation. At a period close to the sidereal day the spheroidal mode is accompanied by rigid rotation of the liquid outer core with respect to the solid earth. This is the well-known diurnal wobble of the Earth. It appears probable that the diurnal wobble is one of a class of similar wobbles that involve large toroidal motions in the outer core. Finally, the amplitudes of the 18·6-yr principal nutations has been computed. Excellent agreement is found with observed values.     

青海某矿浮选尾矿浸铜、金的研究I.铜的浸取

分别用常规浸取法和协同浸取法对青海某矿浮选尾矿进行浸铜的研究。使铜的浸取率由常规法的40％提高到协同浸取法的60—70％。这对于解决含结合氧化铜较高的金属尾矿的湿法冶金无疑是一个好方法。     

河南省国际旅游客源市场分析

分析了河南省国际旅游客源市场的空间分布结构、境外游客在河南省内的流向特征及三大客源市场的状况,建立了河南省国际旅游客源市场的预测模型,并提出了今后境外旅游客源市场的开拓方向和促销策略。     

The crust and upper mantle structure and the stretching mechanism of the Okinawa Trough

The major aim of this study is to put forwad a valid model to explain the gravity anomalies observed over the Okinawa Trough which the crustal structure and a reasonable model of the downgoing slab themselves cannot explain. The result of inversion indicates that the lithosphere above the center of the trough thins out to 45% of the normal thickness (63 km) of the lithosphere of the East China Sea. Fur ther, the originations of lithospheric force are discussed. The tensional stress of about 160 bar arising from density contrast in the Okinawa Trough is recognized to be the most important causative factor in the stretching of the trough. Contribution No. 1487 from Institute of Oceanology. Academia Sinica     

中国植被类型区大气增温趋势及其不对称性研究

利用1962~2011年中国各植被类型区的452个站点的气温资料,分析了各植被类型区的年平均温度和极端温度随时间的变化趋势。结果表明：① 过去50 a间,中国各植被类型区年平均气温、年平均最高温、年平均最低温都显著升高,并且最低温增温速度快于最高温增温速度,呈温差减小的不对称增温趋势;同时,寒冷地区增温速度高于温暖地区的增温速度,其中寒温带森林的增温幅度超过亚热带森林的2倍。近30 a间,寒温带森林区和温带森林区增温速度减缓,其他各植被类型区增温速度加快,呈现出热带、亚热带地区增温速度高于温带、寒温带地区的空间特点;② 最高温增温速度在变快,最低温增加速度在变慢,多个植被类型区的最高温增温速度高于最低温增温速度,呈现出一种新的不对称增温趋势,即最高温与最低温间的温差在加大;③ 过去50 a和近30 a间,生长季和非生长季的温度变化多样,并分别对年平均温度产生了不同的影响,而生长季和非生长季温度的不同变化分别决定于其最高温和最低温的多样变化。     

江河源区生态环境范围的探讨

The Tibetan Plateau, as the origin of the Yangtze and Yellow rivers, is the region of climate variation and is very sensitive to climate change in China (Feng etal., 1998). The runoff in the upper reaches of the Yellow River has been decreasing at a rate of 9.8 m3/s per decade due to rapid climate warming in the Tibetan Plateau since the mid- and late 1980s (Zhang etal., 2000). Eco-environmental change is also extremely substantial in the source regions of the Yangtze and Yellow rivers. T…     

叶尔羌河流域潜水蒸发规律试验分析

本文根据新疆叶尔羌河流域地下水均衡场的潜水蒸发试验资料,探讨了潜水蒸发的影响因素,对潜水蒸发量进行了公式拟合。结果表明,指数型公式,阿维里扬诺夫公式和清华公式比较适合于该地区潜水蒸发量的估算,幂函数型公式的拟合结果较差,简化的指数型有一定的适用范围。