THE PAOTE AND CHINGSHUI PHYSIOGRAPHIC STAGES AND THEIR SIGNIFICANCE.

Reasons are given for the introduction of two new stage-names in the series of steps by which the present land-surface has evolved. The term Paote Stage is proposed for the long-recognized phase of aggradation (between the Tanghsien and Fenho erosional stages) during which the Red Clays and high gravels accumulated. The importance of the Chingshui Stage has not previously been appreciated, but it is now clear that an epoch of erosion separated the Sanmen and Malan (loess) Stages of accumulation. When Dr. Andersson first applied the term Fenho Stage to the dissection seen in the Chaitang Basin, Dr. V. K. Ting had not yet discovered the Sanmen beds. With the recognition that these beds were not an isolated deposit but represented a distinct change of conditions which left its mark widespread over Northern China, it became necessary to establish the exact relationship between the Sanmen and Fenho in Willis's type area.     

CORRELATION BY FLUVIATILE TERRACES

INTRODUCTION The use of landforms as a means of correlation to supplement pal(?)on-tological and stratigraphic evidence has recently been receiving increasing atten-tion in connection with problems of Cenozoic research in China.     

AREAS OF 3338 ISIANDS ALONG THE COAST OF CHINA

1 All islands are measured by Plauimeter.2 Maps and charts used: a, British Admiralty Charts b, Charts published by the Hydrographic Department of Chinese Navy, c, Japanese Charts     

Laboratory and field performance of recycled aggregate base in a seasonally cold region

The objective of this project was to characterize the freeze-thaw properties of recycled concrete (RCA) and asphalt (RAP) as unbound base and to assess how they behaved in the field for nearly 8 years. This paper includes an examination of existing information, laboratory studies of freeze-thaw behavior, and evaluation of data from MnROAD field-test sections in a seasonally cold region, i.e., in Minnesota, USA. Test sections were constructed using recycled materials in the granular base layers at the MnROAD test facility. One test section included 100% RAP, another 100% RCA, a third one a 50/50 blend of RCA/natural aggregate, and a fourth one only natural aggregate (Class 5) as a control. The stiffness (i.e., elastic modulus) was monitored during construction and throughout the pavement life by the Minnesota Department of Transportation, along with the variation of temperatures and moisture regimes in the pavement to determine their effects on pavement performance. The resilient modulus of each material was determined by bench-scale testing in accordance with NCHRP 1-28a, as well as by field-scale tests incorporating a falling-weight deflectometer. Specimens were subjected to as many as 20 cycles of freeze-thaw in the laboratory, and the change in their resilient modulus was measured. In the field-test sections constructed with the same materials as the base course, temperature, moisture, and field modulus (from falling-weight deflectometer tests) were monitored seasonally for nearly 8 years. From the temperatures in the base course layer, the number of freeze-thaw cycles experienced in the field was determined for each test section. Inferences were made relative to modulus change versus freeze-thaw cycles. Conclusions were drawn for long-term field performances of the recycled base (RAB) in comparison to natural aggregate.     

Solar Stokes Spectrum Observation at Yunnan Astronomical Observatory

1　ＳｉｇｎｉｆｉｃａｎｃｅｏｆＳｏｌａｒＳｔｏｋｅｓＳｐｅｃｔｒｕｍＯｂｓｅｒｖａｔｉｏｎＤｕｅｔｏｔｈｅｄｅｖｅｌｏｐｍｅｎｔｉｎｏｂｓｅｒｖｉｎｇｉｎｓｔｒｕｍｅｎｔ,ｔｈｅｃｏｎｃｅｐｔｏｆｓｏｌａｒｓｐｅｃｔｒｕｍｓｈｏｕｌｄｂｅｇｅｎｅｒａｌｉｚｅｄ .Ｉｎｔｈｅｐａｓｔ,ｉｔｉｓｏｎｌｙａｓｓｉｇｎｅｄｔｏｔｈｅｏｒｄｉｎａｒｙｏｒｕｎｐｏｌａｒｉｚｅｄｓｐｅｃｔｒｕｍｒｅｃｏｒｄｉｎｇｔｈｅｗａｖｅｌｅｎｇｔｈ ｄｉｓｔｒｉｂｕｔｅｄｉｎｔｅｎｓｉｔｙｏｆｔｈｅｃｏｎｔｉｎｕｕｍａｎｄ…     

The Holocene Evolution of the Ebre Delta Catalonia, Spain

１　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｆｉｒｓｔｒｅｌｅｖａｎｔｉｎｆｏｒｍａｔｉｏｎａｂｏｕｔｔｈｅｇｅｏｌｏｇｙａｎｄｅｖｏｌｕｔｉｏｎａｒｙｔｒｅｎｄｓｏｆｔｈｅＥｂｒｅｄｅｌｔａｃａｍｅａｓｐａｒｔｏｆａｓｔｒａｔｉｇｒａｐｈｉｃｓｔｕｄｙｂｙＭａｌｄｏｎａｄｏＡ［１］．Ｈｅｍｅｎｔｉｏｎｅｄｔｈａｔｄｕｒｉｎｇｔｈｅｌａｓｔｔｒａｎｓｇｒｅｓｓｉｖｅｅｖｅｎｔ,ｔｈａｔｉｓｂｅｆｏｒｅｓｅａｌｅｖｅｌｒｅａｃｈｅｄｉｔｓｐｒｅｓｅｎｔｌｅｖｅｌ,ｄｅｌｔａｉｃｐｒｏｇｒａｄａｔｉｏｎｏｎｌ…     

乌鲁木齐天文站25m天线18cm脉冲星脉冲到达时间观测系统

脉冲星脉冲到达时间观测系统建立在２５ｍ射电天线的１８ｃｍ波段上,消色散采用了２ｘ１２８ｘ２．５ＭＨｚ多通过滤波器和数字化器,数据采集系统由ＰＣ机完成．１９９９年５月至６月间建立了基于常温接收机的到达时间观测系统．观测到的最弱源的平均流量密度为４ｍＪｙ．     

存在一个气候吸引子吗？

过去有关几百万年气候演变的信息,多半来卜＆过深海岩芯同位素记录的时间序列。气候学的一个主要任务是,从这些有限的信息中识别气候动刀学源的基本特征、我们利用非线性动力系统理论．仅用这些时间序列资料就可确定某些气候的关键特征。     

应用正交偶极Z测井资料测量EDA地层的横波各向异性

采用3种分析EDA地层横波各向异性的技术处理了从Wyoming Powder河谷用正交偶极子测井取得的数据资料.这些处理技术基于挠曲波在各向异性介质中发生分裂的现象而模拟VSP中的横波数据处理.四组分的正交偶极子测井数据是用Schlumberger公司的测井仪从井深3 550m的一段长为56m的垂向裂缝发育的地层中采集的.根据对各发射-接收器组记录数据处理结果的一致性与方差来看,非正交旋转法效果最好.但线性变换法的结果也是可以接受的.线性变换法的优点是节省机时.从这组数据处理的结果来看,极化能谱法计算量相对较大并且对噪音的影响较敏感.