高斯投影坐标换带和子午线收敛角计算编程

针对测量工作中人工进行高斯投影、坐标换带和平面子午线收敛角计算非常麻烦又容易出错的问题，采用迭代法趋近求值，用ＢＡＳＩＣ语言编制了相应的计算机程序，实现了上述计算。该程序可用于便携式ＰＣ－１５０１计算机，输入简便，能直接得到通用的坐标和数据。实践结果表明：其计算精度合乎要求，计算速度比人工计算提高几百倍。     

关于Zonal多项式积分的一个结果

考虑■本文将（·）式化为易于计算 含有多重多项式的简单形式。     

PCP自控技术在中原油田离心注水泵站的应用

介绍了中原油田注水工艺流程,分析了离心注水泵站存在的主要问题,分析了离心注水泵站机组节能降耗的影响因素,阐述了PCP自控技术在中原油田离心注水泵站的应用,并分析了现场应用效果及经济效益。     

浙西龙王山植被在地带性植被中的地位探讨

龙王山位于浙江西北部的安吉县境内,紧邻临安天目山,北纬30°22',东经119°27'.它是天目山脉的主要山峰之一,主峰海拔1587.4m,比西天目山略高,整个保护区的面积为1.8万亩.通过对龙王山植物区系、群落特征、气象资料以及栽培植物的分布状况等方面的分析,论证了龙王山植被倾向于中亚热带性质,并肯定其向北亚热带过渡的过渡性地位.     

Occurrence of two types of El Niño events and the subsurface ocean temperature anomalies in the equatorial Pacific

The relationships between the evolution of two types of E1 Nifio events and the subsurface ocean temperature anomaly （SOTA） in the equatorial Pacific are compared in this study. The results show that both types of E1 Nifio are negatively correlated to the SOTA in the equatorial western Pacific, but relationships are different in different phases of E1 Nifio. Furthermore, the occurrence of different types of E1 Nifio is related to different features of the equatorial thermocline, e.g. its zonal gradient, significant variation area, amplitude and duration of thermocline oscillation. The propagation of SOTA in the equator plays an important role during the evolution of both types of E1 Nifio, but shows dramatic differences in intensity, duration and phase reverse of warm SOTA. Moreover, the pathways of SOTA signal are different between these two types of E1 Nifio. The dominant pathway in the life cycle of Eastern Pacific （EP）-E1 Nifio lies on the equator and to its north, but there is no loop to the south of the equator. In contrast, the dominant pathway in Central Pacific （CP）-E1 Nifio is located on the equator and to its south, and the propagation signal of SOTA to the north of the equator is very weak. The relationships between the zonal wind anomalies and the two types of E1 Nifio are also preliminarily discussed. It is shown that EP-E1 Nifio is more likely to respond to the westerly anomalies over the equatorial central and western Pacific, while CP-E1 Nifio is more likely to respond to the westerly anomalies over the equatorial western Pacific and need the cooperation of easterly anomalies over the equa- torial eastern Pacific to certain extent.     

冲压增程弹用进气道试验与数值研究

对某冲压增程弹用超声速双锥进气道流场特性进行研究,在风洞试验中得到合理的流场结构图谱及试验数据.采用块结构网格与二阶精度流场分区求解技术,对该超声速进气道内外流场进行数值研究.通过数值模拟得到了对应于不同出口反压和攻角情况下,超声速进气道内外粘性流场复杂的波系结构,分析了进气道内外流场的形成过程.结果表明:数值模拟得到的流场结构波系图与风洞试验纹影图一致,并且进气道扩压段静压分布以及进气道出口位置的总压分布与试验结果基本一致.