基于MPC860T的路由器的硬件系统设计

主要介绍了利用嵌入式处理器MPC860T实现一种低端路由器的设计方案.描述了路由器硬件系统的组成以及各个模块的功能,涉及到了对嵌入式处理器MPC860T的应用、以太网技术、HDLC协议以及E1技术等.     

Magnetostratigraphy of the Ahuachapán-Chipilapa geothermal field, El Salvador

The volcanic stratigraphy for the Ahuachapán-Chipilapa geothermal field is defined on the basis of the magnetostratigraphic results on 156 oriented samples from 33 sites. The magnetostratigraphic sequence shows that the major volcanism associated with the Concepción de Ataco caldera and the Cuyanausul volcano took place during the middle Brunhes chron (Quaternary). Pre-caldera activity of small centers such as Empalizada and Apaneca in the southern sector of the field occurred during the early Brunhes (0.77±0.07 Ma). Basaltic-andesitec activity associated with the Cuyanausul volcano took place earlier, i.e. during the Matuyama chron, possibly around 1.3±0.15 and 1.7±0.3 Ma.The local igneous basement is composed of Late Miocene-Pliocene andesites, ignimbrites and volcano-sedimentary deposits. Normal polarities and a K---Ar date of 7.37±0.73 Ma indicate that the volcanic activity in the study area extends beyond the Gauss chron. The polarity of some of the units in the post-caldera sequence and in the Concepción de Ataco and Cuyanausul sequences suggests that they may have recorded short polarity subchrons.     

Influence of Solid Fraction on Structure of QTi3.5-15/Graghite Slurry

The electromagnetic-mechanical stirring technology was used to prepare QTi3.5-15/graghite slurry. The distribution of graphite particies in QTi3.5-15/graghite slurry was studied using cold quenching method. The results show that solid fraction of QTi3.5-15/graphite slurry increases with the decreasing of stirring temperature. There is a linear relationship between solid fraction and stirring temperature. With the increasing of solid fraction, the distribution of graphite particies in slurry becomes uniform gradually. When the solid fraction is larger than 45%, the rising of graphite particies in slurry can be restricted, and QTi3.5-15/graghite slurry with uniform distribution of graphite particies can be prepared.     

Linking between sequence stratigraphy and reservoir quality of Abu Madi Formation utilizing well logging and seismic analysis at Abu Madi and El Qar’a fields,Nile Delta,Egypt

This work has been carried out to interpret the link between sequence stratigraphy of the incised valley deposits with the reservoir quality in the Abu Madi Formation in the Abu Madi and El Qar’a Fields, onshore Nile Delta, Egypt based on borehole and seismic data. The distribution of sand-body in the Abu Madi Formation revealed that the fluvial channel sandstones are not randomly distributed but are controlled by the fluctuation of the sea level (regression and transgression). Interpretation of sandstones distribution of the Abu Madi incised-valley within a sequence stratigraphic framework allows a better understanding of their characterization during burial. The Abu Madi Formation is made up of two sequences: the lower sequence-1 (SQ 1) and upper sequence-2 (SQ 2). Sequence-1 forms the basal part of the Abu Madi Formation. It consists of two systems tracts in all the studied wells, in which the lowstand systems tract is overlained by a transgressive systems tract (TST-1), except at AM-12 and AM-15 wells in the western and eastern sides of the studied area, respectively where it consists of only transgressive system tract (TST-1). The upper sequence-2 (SQ2) is recorded in all the studied wells except at AM-12 and AM-15 wells. It is composed of two systems tracts (LST-2 and TST-2); the lower lowstand systems tracts contains thin sandstone channel-fill interpreted as LST-2, above this sandstone channel-fill the tidal deposits interpreted as TST-2. The lowstand systems tracts of the studied Abu Madi Formation is considered good reservoir target in the studied area, its porosity ranged from 15 to 22%. It was formed due to a rapid fall in relative sea level below the shelf edge formed valley incision due to subaerial exposure of the continental shelf. The floodplain deposits of TST represent a good seal separating LST reservoirs and water bearing zone of lower sequence (SQ1) and upper sequence (SQ2) in each well.     

前列腺素E1冻干隐形脂质体包封率的测定

目的评价前列腺素E1（PGE1）冻干隐形脂质体的质量,测定PGE1冻干隐形脂质体的包封率。方法用超滤法分离脂质体和游离药物;采用HypersilC18柱（250mm×4．6mm,5μm）,流动相：pH4．9的磷酸二氢钾溶液-乙腈（3：2）,流速1．0mL·min^-1,检测波长210nm,测定药物含量,计算包封率。结果超滤法能很好的分离脂质体与游离药物,PGE1在1～50mg·L^-1内线性关系良好（r=0．9993）,平均包封率为93．02％。结论超滤-HPLC法测定PGE1冻干隐形脂质体包封率方法简便、准确。     

关于厄尔尼诺现象

本文介绍了厄尔尼诺现象。在海洋学上,它指的是每年１２ 月份出现在南美厄瓜多尔湾海面水温偏高的现象,厄尔尼诺现象年年有,只是在海洋学上称之为明显的厄尔尼诺现象出现时,才会给世界许多地方带来影响。文章从大气科学和海洋学的角度说明了明显的厄尔尼诺现象的影响和形成原因。     

厄尔尼诺-南方涛动海-气振子系统的同伦映射解

厄尔尼诺-南方涛动是一个涉及赤道太平洋海-气交互作用的年际现象.本文的目的是创建一个求解厄尔尼诺-南方涛动模型非线性系统的渐近方法.首先利用线性齐次常微分系统的特征值理论得到了对应初值问题的解,并以此解为原系统的零次近似解,然后利用同伦映射关系式依次构造原系统的各次迭代解,最后在这基础上借助同伦映射方法研究了厄尔尼诺南方涛动系统海-气振子对应问题的渐近解,并证明了得到的渐近解的一致有效性.从得到的结果看出,同伦映射方法能够用于分析厄尔尼诺-南方涛动系统在赤道东太平洋中的海表温度异常和海-气振子的温跃层深度异常.     

Study on Surface States of Zinc Sulfide Electroluminescence Thin Films

１ＩｎｔｒｏｄｕｃｔｉｏｎＺｉｎｃｓｕｌｆｉｄｅｉｓａⅡ－Ⅳｓｅｍｉｃｏｎｄｕｃｔｏｒｃｏｍｐｏｕｎｄｗｉｔｈｗｉｄｅｂａｎｄｇａｐ．Ｔｈｅｔｈｉｎｆｉｌｍｓｈａｖｅｅｘｃｅｌｅｎｔｃｈａｒａｃｔｅｒｓｏｆｅｌｅｃｔｒｏｌｕｍｉｎｅｓｃｅｎｃｅ（ＥＬ...     

Temporal and spatial distribution of local seismicity in the Chipilapa-Ahuachapán geothermal area, El Salvador

Microseismic monitoring of the Chipilapa-Ahuachapán area was carried out during August-November 1988 and October 1991–April 1992. The objective was to use the study of microearthquakes as an exploration tool to invvestigate the geothermal potential of the Chipilapa area and to evaluate the main characteristics of the seismic activity, prior to and during the exploitation tests. Since 1989, seven wells have been drilled in the area, two of which have encountered three geothermal aquifers that could be exploited for electricity generation by means of binary-cycle technology. The 1988 survey detected important, shallow and low magnitude seismic activity, located mainly south and southwest of the explored area. This activity is possibly related to the recharge zone of the Chipilapa-Ahuachapán geothermal system, located further south, beneath the Pleistocene Pacific Volcanic Chain. The 1991–1992 survey confirmed the existence of seismicity beneath the southern volcanic axis, but other important clusters of activity were recorded northward, related to the deeper structures of the Central Graben, and southwest of the Ahuachapán geothermal field, close to the 1990 hydrothermal eruption of Agua Shuca. Shallow microseismic activity also appeared along the faults limiting the Chipilapa geothermal field to the east. Although it is probable that this seismicity is due to fluid circulation in fractures, no geothermal reservoirs were intercepted by wells CHA and CH8. Moreover, no significant induced seismicity was recorded during production and injection tests.