Polyspectral Analysis of Two-dimensional Mixed Processes and Coupled Harmonics

1　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｍａｎｙａｐｐｌｉｃａｔｉｏｎｓ,ｓｕｃｈａｓｒａｄａｒ,ｓｏｎａｒ,ｇｅｏｐｈｙｓｉｃｓ,ｒａｄｉｏｃｏｍｍｕｎｉｃａｔｉｏｎａｎｄｍｅｄｉｃａｌｉｍａｇ ｉｎｇ ,ｔｈｅｐｒｏｂｌｅｍｏｆｔｗｏ ｄｉｍｅｎｓｉｏｎａｌｆｒｅｑｕｅｎｃｙｅｓｔｉ ｍａｔｉｏｎｈａｓｒｅｃｅｉｖｅｄａｌｏｔｏｆａｔｔｅｎｔｉｏｎｉｎｒｅｃｅｎｔｙｅａｒｓ.ＩｎｔｈｅｃａｓｅｏｆａｄｄｉｔｉｖｅｗｈｉｔｅＧａｕｓｓｉａｎｎｏｉｓｅ,ｎｕｍｅｒｏｕｓｍｅｔｈｏｄｓｓｕｃｈａｓＭＥＭＰ[1 ] ,ＭＵＳ…     

Tracking Control and Synchronization for Two-Dimension Discrete Chaotic Systems

1　ＩｎｔｒｏｄｕｃｔｉｏｎＳｉｎｃｅ 1 990 ,ｃｈａｏｔｉｃｓｙｎｃｈｒｏｎｉｚａｔｉｏｎ[1～ 4] ａｎｄｃｈａｏｔｉｃｃｏｎｔｒｏｌｌｉｎｇ[5～6] ｈａｖｅｒｅｃｅｉｖｅｄａｇｒｅａｔｄｅａｌｏｆａｔｔｅｎｔｉｏｎ[7～1 1 ] ,ａｎｄｃｈａｏｔｉｃｓｙｎｃｈｒｏｎｉｚａｔｉｏｎｉｓａｐｈｅｎｏｍｅｎｏｎｏｆｉｎｔｅｒｅｓｔｉｎｆｉｅｌｄｓｆｒｏｍｅｌｅｃｔｒｏｎｉｃｓｔｏｃｏｍｍｕｎｉｃａｔｉｏｎ[1 2 ] ,ａｎｄｆｒｏｍｂｉｏｐｈｙｓｉｃｓｔｏｎｅｕｒｏ ｓｃｉｅｎｃｅ[1 3] .Ｉｆｃｈａｏｔｉｃｓｙｎｃ…     

OSCILLATION AMPLITUDE OF THE FREE END OF A FLEXIBLY MOUNTED RIGID CYLINDER IN TRIANGLE ARRANGEMENT

In this paper,the oscillation amplitude of the free end of a group of threecylinders are studied.The three cylinders are erected at the vertices of an equilateral trian-gle,and three arrangements are made in this study.One of the three cylinders is served asa working cylinder which is mounted by a flexible cantilever and two accelerometers areattached on the free end in two directions.The results of the three-cylinder arrangementare compared with those of two cylinders in tandem/side-by-side arrangement in the samecondition.The experimental results show that the rear cylinder of a group of three cylin-ders is affected more seriously than that of the corresponding two cylinders in the contrastarrangement.The main direction of oscillation is changed.The transversal oscillation isstronger than the longitudinal oscillation in the three-cylinder arrangement.On the con-trary,the transversal oscillation is much weaker than the longitudinal oscillation in two-cylinder arrangement.The largest transversal oscillat     

一种适合于电容式气敏传感器的加热膜

覆着气敏层的叉指式电容适于用微电子技术使气体传感器集成化,它们能通过安装在加热膜上而使其温度稳定,但通常都面临着通过该加热膜对大面积传感器的有效温度梯度的问题。介绍了在加热膜上能保证近乎均匀温度分布的加热器配置,用于估计方形膜加热功耗的分析方法和有限元模拟法。试验芯片已被设计和制造,其制作过程完全符合于标准的两极工艺。     

Vibration Monitoring and Diagnosis of Pipe-line Pumps on Offshore Platforms

ＶｉｂｒａｔｉｏｎＭｏｎｉｔｏｒｉｎｇａｎｄＤｉａｇｎｏｓｉｓｏｆＰｉｐｅｌｉｎｅＰｕｍｐｓｏｎＯｆｓｈｏｒｅＰｌａｔｆｏｒｍｓＺｈｅｎｇＷｅｎＴｅｃｈｎｏｌｏｇｉｃａｌＦａｃｕｌｔｙｏｆＭａｉｎｔｅｎａｎｃｅＥｎｇｉｎｅｒｉｎｇＧｕａｎｇｚｈｏｕ...     

工业还原NS—掺杂蓝钨过程中掺杂剂相的形成和结合

本文叙述了用于生产具有不下垂性能的细钨丝的ＮＳ－掺杂蓝钨工业还原过程中掺杂剂相的形成和结合。在还原过程中结合适量的掺杂剂是钾残留在烧结锭中的基本保证，钾能在丝材制造中形成钾泡串，使在随后的的灯丝工作时形成大晶联锁微结构，而这是不下垂特性的关键所在。本文的第一部分讨论了金属钨粉的工业生产方法。虽然掺杂Ｋ、Ａｌ、Ｓｉ的钨粉的生产方法与末掺杂的钨粉的生产方法基本相同，但仍有一些特别的区别要介绍。本文分析     

EFFECT OF STREAMLINE CURVATURE AND SOME OTHER CONDITIONS ON THE TURBULENT STRUCTURES IN THE OTHER REGION OF AN OBSTACLE

ＥＦＦＥＣＴＯＦＳＴＲＥＡＭＬＩＮＥＣＵＲＶＡＴＵＲＥＡＮＤＳＯＭＥＯＴＨＥＲＣＯＮＤＩＴＩＯＮＳＯＮＴＨＥＴＵＲＢＵＬＥＮＴＳＴＲＵＣＴＵＲＥＳＩＮＴＨＥＯＴＨＥＲＲＥＧＩＯＮＯＦＡＮＯＢＳＴＡＣＬＥＬｉｕＳｈｉ－ｈｅ（ＷｕｈａｎＵｎｉｖｅｒｓｉｔ...