A NOTE ON RELATIONS BETWEEN SEASONALLY ADJUSTED VARIABLES

Abstract. This paper examines, with reference to some well known data, possible difficulties in the fitting of simple non-seasonal models to seasonally adjusted time series data.     

Dynamic model for landsliding monitoring under rigid body assumption

1　ＩＮＴＲＯＤＵＣＴＩＯＮＬａｎｄｓｌｉｄｅｉｓａｍａｉｎｃａｕｓｅｏｆｔｈｅｎａｔｕｒａｌｄｉｓａｓｔｅｒ.Ｉｎｏｒｄｅｒｔｏｐｒｅｖｅｎｔｔｈｅｄｉｓａｓｔｅｒｃａｕｓｅｄｂｙｌａｎｄｓｌｉｄｅ,ａｌｏｔｏｆｓｌｏｐｅｍｏｎｉｔｏｒｉｎｇｗｅｒｅｃａｒｒｉｅｄｏｕｔ,ｈｅｎｃｅａｌｏｔｏｆｍｅｔｈｏｄｓｈａｖｅｂｅｅｎｐｒｏｐｏｓｅｄｔｏａｎａｌｙｚｅｔｈｅｄａｔａｃｏｌｌｅｃｔｅｄｔｈｒｏｕｇｈｓｌｏｐｅｍｏｎｉｔｏｒｉｎｇ[1 ] .Ｂｕｔｍｏｓｔｏｆｔｈｅｓｅｍｅｔｈｏｄｓｗｅｒｅｂａｓｅｄｏ…     

Mechanistic cutting force model in band sawing

In order to establish a mechanistic model of cutting force, specific cutting pressure was first obtained through cutting experiments. The band sawing process is similar to milling in that it involves multi-point cutting, so it is not an easy matter to evaluate specific cutting pressure. This was achieved by making the thickness of workpiece smaller than one pitch of the saw tooth, analogous to fly cutting in the face milling process. Then the cutting force was predicted by analysing the geometric shape of a saw tooth. The tooth shape used was the raker set style that is generally used in band sawing. A set of teeth comprises three teeth, ranked as left, straight, and right. The mechanistic model developed in the research considered the shape of each tooth in a set. The predicted cutting forces coincided well with those measured in the validation experiment. Therefore, the predicted cutting forces in band sawing can be used for the adaptive control of saw-engaging feed rate in band sawing.     

新几何模型与SELF—SReM模型的关系

将新几何模型和ＳＥＬＦ－ＳＲｅＭ模型的优点相结合,提出了通过引入多元系中的某些特征点信息,提高模型对多元系过剩热力学性质预报精度的新方法,并用之于对Ｍｎ－Ｆｅ－Ｃ和Ｆｅ－Ｓｉ－Ｃ两个三元合金熔体的过剩Ｇｉｂｂｓ自由能的计算,计算与实测结果吻合。     

焊接热输入对HQ130钢焊接热影响区组织硬度的影响

ＭＩＧ／ＭＡＧ焊接热输入包括焊接电弧热流和熔滴带入熔池的热焓量两部分,本文以作者提出的焊接热输入分布模型为基础,建立了熔流场和温度场的数值分析模型,采用数值模拟技术研究了焊接热输入对ＨＱ１３０钢焊接热影响区（ＨＡＺ）组织和硬度的影响规律,给出了不同焊接热输入时ＨＡＺ不同部位奥氏体晶粒尺寸及组织和硬度的计算结果,实验表明,ＨＱ１３０钢焊接热循环及ＨＡＺ组织,硬度的计算值和值吻合良好。     

外加纵向磁场GTAW焊接机理：Ⅱ。电弧模型

针对外加纵向磁场GTAW（gas tungsten-arc welding)焊接过程,采用小孔气体微压传感器法和钨极探针法分别测定了外加纵向磁场GTAW焊接电弧在水冷Cu阳极上的等离子流力和电流密度的分布,并对其规律进行了研究,建立了外加纵向磁场GTAW焊接电板等离子流力和电流密度的径向分布数学物理模型。     

一种新型轧辊裂纹检测装置

以磁为激励源进行轧辊表面及内部裂纹缺陷的检测,基于磁荷理论的裂纹数学模型的建立和神经网络的分段循环逼迫的裂纹信号定量分析,实现了裂纹无损定量检测。经在铁磁材料上模拟实验取得了满意效果。     

直流螺管式电磁铁的动特性研究

本文采用分段磁路法，对直流螺管式电磁铁进行了磁路分析，在考虑漏磁，导磁体中涡流、导磁率的非线性等因素的基础上建立了动态数学模型，讨论了结构参数对动态性能的影响，并提出了缩短电磁铁动作时间的措施。     

一种并行工程信息集成框架的构建

本文针对现有的并行工程信息集成框架对并行工程只提供消极支持的问题展开讨论，通过技术域，支撑域，管理域三个域的建立与分析，特别是对ＣＦ积极支持方法进行探讨，提出一种推拉式的建模思想，实现对并行设计的监督和控制。并依此思想建立了一个ＣＥ信息集成框架。     

FIELD-NETWORK MODEL FOR MINE FIRE SMOKE MOVEMENT

ＦＩＥＬＤＮＥＴＷＯＲＫＭＯＤＥＬＦＯＲＭＩＮＥＦＩＲＥＳＭＯＫＥＭＯＶＥＭＥＮＴ①ＪｉａｎｇＪｕｎｃｈｅｎｇ，ＷａｎｇＸｉｎｇｓｈｅｎＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｉｎｇＥｎｇｉｎｅｒｉｎｇ，ＣｈｉｎａＵｎｉｖｅｒｓｉｔｙｏｆＭｉｎｉｎｇａｎｄＴ...