西昆仑山崇测冰帽温度分布研究

冰川温度场研究具有气候学意义,尤其在缺乏气象台站的地区更是如此。崇测冰帽位于藏西北高原,东经81°、北纬35°、顶部海拔6580m。1987年8月,沿冰帽主流线,从海拔6366—5950m作者对六个冰岩芯钻孔及旁边雪坑进行了冰温测量.在海拔6328m的S12岩芯孔内7—8m深处测到一16.4℃的冰温,为我国目前测到的最低冰温.本文拟在前人研究基     

INFLUENCE OF SIDELONG HEAT TRANSFER ON PTR SIGNAL

The influence of the sidelong heat transfer on the PTR signal is discussed. The typical effect is to reduce the phasedelayof the PTR signal when thermal waves extend to the sideface. A three-dimensional model, of which the results are in good agreement with the experimental date, is put forward. Comparisons with the results from the one-dimensional model are given.     

气体温度测量技术和误差分析

从实际出发,综合分析讨论了温度传感器测量流动气体温度时产生测量误差的原因和减少误差的措施。     

浅议混凝土裂缝的预防和处理

1.前言混凝土是一种非均质脆性材料,由骨料、水泥、砂石、水以及存留其中的气体和其它外加材料混合而组成的。在温度和湿度变化的条件下,由于混凝土施工和本身变形、约束等一系列问题,硬化成型的混凝     

基于LabVIEW的远程温度采集系统及其在化学中的应用

本文以LabVIEW程序语言为核心，介绍了远程温度采集系统的原理、软硬件组成和实现过程，并以化学反应中的温度测量为例，通过串口完成了温度数据的快速采集。此类测控系统价格低廉且构建快速，可以方便的移植到其他众多领域。     

Distributed modeling of the beginning and ending dates and durations of limited temperatures over the rugged terrain of Chongqing

A physically based empirical model was established for the beginning and ending dates (BED) of limited temperatures.Data used were daily mean temperatures from 34 conventional stations in the Chongqing region,measured from 1961 to 2000.Using this model in combination with the distributed modeling results of monthly mean temperatures,we developed a method for creating a distributed simulation of the BED and durations of limited temperatures in the rugged terrain of Chongqing.Spatial distribution maps were generated at a resolution of 100×100 m for the BED and durations of the limited temperatures of 0,10,15 and 20.Simulations suggest that the distributed model is able to successfully reveal the macroscopic trends and local distributions.For the modeled BED,the mean absolute bias error is 0.6-2.4 d.Cross-validation and case-year tests show mean absolute bias errors of 1.3-2.8 d and 0.7-2.5 d,respectively.Comparison shows that the simulation results are consistent with the field investigations.This implies that the simulations are as good as observations,thus providing a viable technique for simulating mountainous heat resources using conventional meteorological data.     

基于卫星遥感机理模型和陆面模式的土壤含水量同化研究

土壤湿度在陆气相互作用过程中扮演着重要的角色，是气候、水文、农业、林业等研究中重要的地球物理参数之一。土壤湿度影响地面蒸散，径流、地表反射率、地表发射率以及地表感热和潜热通量，从而对气候有重要影响，它对大气的影响在全球尺度上仅次于海面温度，在陆地尺度其影响超过海面温度。     

低速滚筒钢球磨煤机绞龙轴承座的改造技术

针对原有机组磨煤机轴承频繁损坏致使磨煤机组被迫进入检修状态的问题,综合本厂磨煤机组的实际情况,本文提出了一套完整的针对磨煤机轴承的方案改造技术,并通过技术改造取得了良好的社会效益和经济效益。     

这一次与太阳奇异邂逅

<正>据说这是一场地球与太阳相守三百多年的美丽邂逅;据说由于它的到来短短几天暴富了长江沿岸的旅游业、餐饮业还有大大小小的天文器材供应商;据说还成全