Latitudinal drift of solar magnetic field imbalance

The latitudinal drift of the imbalance flow of magnetic fields as a whole and the latitudinal drift of the imbalance flow components with certain significant rotation periods are determined. Comparison of these two drift types is performed for different ranges of magnetic field strength using the data of a 26-year observation period. The mathematical model of representation of the imbalance as a steady-state random process is used. As a result of analysis the following facts are established: (i) structures rotating with the same significant period are observed in a wide latitude range, (ii) there exist several significant periods in the power spectrum for one latitude, (iii) the character of the latitudinal drift of the imbalance flow of magnetic fields as a whole and the imbalance structures rotating with significant periods is the same for fields with close strengths, and (iv) for fields with each of the considered strengths there exists a latitude band in which a drift along the meridian is absent.     

低漂移外腔半导体激光器驱动电路的设计

针对自制的852nm外腔半导体激光器,设计了一套低漂移的外腔半导体激光器驱动电路。通过恒温控制模块控制激光二极管的温度,高稳恒流源驱动激光二极管,外腔温控电路用于外腔的温度控制,高压恒压源控制外腔中压电陶瓷的长度。阐述了各部分电路的工作原理,并为降低激光器的频率漂移对电路做了优化。测试结果显示,1h内激光器频率漂移降为15MHz。     

中国能源消费“零增长”何时到来

本文总结了发达国家能源消费“零增长”区域经济社会及能源消费指标的特征, 结合中国实际, 运用人均能源消费“S”形规律, 综合各部门未来能源需求趋势的判断, 全面预测了中国未来25年的能源需求。指出中国能源消费“零增长”将在2030-2035年间到来, “零增长”点的能源需求总量将达43.6亿吨油当量, 人均能源消费量2.98吨油当量。     

软岩巷道聚丙烯混凝土钢筋网壳复合衬砌试验及工程应用研究

根据大跨度空间壳体力学原理,研究聚丙烯网壳锚喷支护新技术。其技术特色是用一种在地面加工成型的特殊三维钢筋支架代替普通的二维钢筋网,大幅度提高了锚网喷结构的支撑能力,不需要使用型钢支架、锚索、围岩注浆等手段进行加固就能有效地支护高地压大变形巷道、跨采动压巷道、冲击地压巷道以及大断面硐室等。依托西山煤电集团大巷破碎段修复工程,完成了聚丙烯纤维混凝土钢筋网壳复合衬砌支护结构的室内模型试验,研究了复合衬砌的变形、破坏形态与发展规律。现场应用表明,在不降低支护的承载能力的情况下,与重型金属支架相比,该支护形式降低了钢材用量和混凝土回弹量,且具有良好的柔性,是软岩巷道一种优良的让压支护结构,具有较好的推广应用前景。     

Subtidal Flow Patterns in Western Florida Bay

Recent observations using moored current meters, shipboard ADCP transects, salinity mapping and drifters have been used to study the residual circulation including wind drift in western Florida Bay.Rapid, nearly synoptic surveys of salinity over a large area was an effective tracer-mapping technique, when salinity gradients were sufficiently strong, and provided qualitative information on Lagrangian water motion for the entire study area. The salinity maps indicated a general south-eastward advection, which was only subordinate to tidal mixing in a narrow zone adjacent to the Florida Keys.Drifter data collected simultaneously, allowed quantitative estimates to be added to the transport pattern suggested by salinity maps. The selectively deployed drifters yielded estimates of total drift velocities. In addition, moored current meters and shipboard current profiling were used to determine the distribution of flow across the mouth of the bay facing the Gulf of Mexico and the transport through Long Key Channel, a major connection between the bay and the Atlantic Ocean.Analysis showed that from 64 to over 92% of the drifter trajectory variances could be explained by the combination of a local wind drift, expressed in terms of a wind drift factor multiplied by the surface shear velocity, and an ambient current. For a 1 m high drifter deployed at the surface of the water column, the wind drift factor was found to be approximately 0·125m, making the drift speed roughly equal to 0·45% of wind speed. The mean drifter speeds were linearly proportional to mean transport estimates derived from the current meter observations in Long Key Channel, enhancing confidence in both data sets.The total south-eastward directed residual current varied between 100 and 5000 m day⁻¹and was weaker in summer than in winter, when southward winds associated with periodic passage of cold fronts boost the residual flow. The estimated contribution from local wind drift varied between 500 m day⁻¹in summer to 1000 m day⁻¹in winter. The remaining contribution to the observed Lagrangian residual circulation in western Florida Bay is caused by other forcing, including tidal rectification, remote wind forcing and large-scale current systems (the Gulf Stream and Florida Current systems).     

甚低频电磁法在河南省竹园铜矿的应用

简要叙述了甚低频电磁法的方法技术，并以河南省西峡县竹园铜矿为例，介绍了甚低频法寻找铜多金属硫化物矿床的显著效果。结合工作效果，对甚低频法的不足之处提出了3点看法。     

安棚碱矿地层自然漂移规律研究及在钻井设计中的应用

依据测井资料对安棚碱矿地层自然漂移规律统计分析，进行井身剖面设计，并运用回归理论确定水平位移与垂直井深相关方程，提出了井口坐标设计方案。经实际应用，缩短了钻井周期，提高了钻机月速及机械钻速。     

运用地球动力合成作用原理揭示地壳运动—“大陆漂移”力学原因

推动地壳运动的力包括地球公转惯性力，等速自转力，星际引力和重力，其合力是大陆漂移的真正动力。     

负载于零漂上的低频非潮汐信息的提取

重力固体潮观测资料中的零漂项，从整体上看，在缓慢地变化着，本文以朔望月的一半作为时间长工，分段对零漂进行线性模拟，之后，再进一步消除长周期潮汐波对零漂的影响，提出了零漂的变化，这是一种低频非潮汐信息，它负载于零漂之上，可能含有地震前兆。     

中国金成矿的大地构造背景

指出中国金成矿的三个大地构造特征，中国第一个岩金成矿高潮的地层时代（古元古代）晚于全球第一个岩金成矿高潮的地层时代（新太古代）；中国第二个岩金成矿高潮地层时代（中生代）早于全球等二个岩金成高潮的地层时代（新生代）；全球有一个围绕北极圈的砂金成矿区，中国另有一个青藏高原砂金成矿区。