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1)  microwave absorption
吸波性
1.
A series of SINCO powders were prepared from polysilazane and characterized by X ray diffraction analysis, infrared spectra, ultimate analysis, and the property of microwave absorption of the powders was determined.
对 SINCO粉末的吸波性作了初步研究。
2.
But when temperature was higher than 800℃,the main phase was only hexagonal Ba-ferrite crystal BaFe12O19 with a diameter of 50-60 nm and microwave absorption property.
在所试验的1-6 GHz范围内,钡铁氧体吸波性能随着微波频率的增高而加强,最佳吸波频率在6 GHz以上。
2)  absorbing property
吸波性能
1.
The impact of magnetizing treatment on the absorbing property of the absorbing coat;
磁化处理对吸波涂层吸波性能的影响
2.
The influence of the fiber absorber's conductivity,the fiber content and the thickness of foam screed on the foam material's absorbing property was discussed by studying the absorbing property of the polyurethane foam filling with a kind of conductive short fibers.
通过对一种含导电短纤维的聚氨酯(PUR)泡沫塑料吸波性能的研究,探讨了纤维吸收剂的电导率、含量和泡沫塑料试样厚度对PUR泡沫塑料吸波性能的影响。
3.
By analysing the absorbing properties of polyurethane foam plastic filling with carbon fiber, carbon fiber/fiberⅠ, carbon fiber/ fiber Ⅱ, the influence of fiber type, content and screed thickness on absorbing property of the plastic sample plate were discussed.
通过对碳纤维、碳纤维/纤维Ⅰ和碳纤维/纤维Ⅱ分别填充的硬质聚氨酯泡沫塑料的吸波性能的研究,探讨了纤维类型、纤维含量、样品厚度的相关变化对塑料样板吸波性能的影响。
3)  absorbing properties
吸波性能
1.
Study of magnetic and conductive polyaniline on microwave electromegnetic parameters and absorbing properties;
兼具铁磁性的导电聚苯胺复合物电磁参数及吸波性能的研究
2.
Electromagnetic parameters of different volume of SiCf and PIF orientated RAM are measured by the free-space reflection method and effects of fiber volume on the electromagnetic parameters are analyzed,as well as absorbing properties are calculated with the measured electromagnetic parameters by theory,and the results of computation are verified by the experiments.
采用自由空间反射法,分别对不同体积分数的碳化硅纤维和铁纤维吸波贴片的电磁参数进行了测试,对纤维的体积分数对电磁参数的影响规律进行了分析,同时,根据测试的电磁参数和各向异性反射理论对纤维的体积分数对吸波性能的影响进行了理论计算和实验验证。
3.
The absorbing properties of FSS absorbers were investigated with finite element method and the results showed that the sheet resistance of FSS unit cell,the parameter p,parameter a and the thickness of dielectric layer were all able to affect the absorbing properties.
采用有限元软件对吸波性能进行研究。
4)  microwave absorbing property
吸波性能
1.
Microwave permittivity of carbon microcoils(CMCs) and microwave absorbing property of CMCs/Epoxy composite;
微螺旋炭纤维的微波电磁参数及其环氧复合材料的吸波性能研究
2.
The microwave absorbing property of coating that was made up of Mn-Zn ferrite nanocrystalline was characterized.
结果发现:与非纳米(微米级)吸波剂相比,纳米Mn-Zn铁氧体吸波剂的吸波性能显著高于前者。
3.
The experiment results showed that the composites materials with core/shell structure exhibits excellent microwave absorbing property.
5~20GHz频段内测试了材料的吸波性能。
5)  absorption properties
吸波性能
1.
Preparation and microwave absorption properties of(LiFe)_xZn_(1-2x)Fe_2O_4;
(LiFe)_xZn_(1-2x)Fe_2O_4铁氧体的吸波性能研究
2.
Study on absorption properties of carbon nanotube/mulberry fiber composites;
碳纳米管/桑皮纤维复合材料吸波性能研究
3.
Microwave absorption properties of copper coated composites;
铜镀层复合材料的吸波性
6)  microwave absorption properties
吸波性能
1.
Experiments are carried out to measure the microwave absorption properties of W-type hexagonal barium ferritet,and two stronge absorbing peak.
对其吸波性能进行了测量,发现有2个强吸收峰:0。
2.
Barium ferrite has excellent microwave absorption properties.
钡铁氧体有着良好的吸波性能,本文介绍了离子掺杂钡铁氧体的制备方法及其研究进展,特别是Ti4+/M2+离子掺杂、Sn4+/M2+离子掺杂、Co3+/Co2+离子掺杂、稀土掺杂钡铁氧体的研究现状,论述了离子掺杂钡铁氧体的几种典型的表征方法,并介绍了离子掺杂钡铁氧体的应用情况。
3.
The influence of dosage of absorbing reagents and thickness of coatings on microwave absorption properties were studied.
以具有强磁损耗特性的磁粉、电阻型和电介质型物质作为吸波剂,制备出了具有阻抗渐变结构的3层复合雷达吸波涂层,研究了吸波剂用量和涂层厚度对吸波性能的影响。
补充资料:波波夫超稳定性
      系统输入输出乘积的积分值受限制的条件下的稳定性,1964年罗马尼亚学者V.M.波波夫所提出。对于所研究的系统,如果用u(t)表示输入向量,y(t)表示输出向量,那么在给定正的常数L后,系统输入输出乘积积分值的限制关系可表示为:
  
  
  
   
  式中uT(t)是u(t)的转置向量。如果对于这种限制总能找到相应的正的常数K和δ,使系统状态方程解的一切形式在时间区间0≤t≤t1内都满足条件‖x(t)‖≤K[‖x(0)‖+δ],这种系统便被称为超稳定的。其中x(0)是系统的初始状态,‖x(t)‖是状态向量x(t)的范数。如果t→∞时,还有x(t)→0,则称系统是超渐近稳定的。超稳定性理论适用于一切类型的控制系统,包括线性系统和非线性系统、定常系统和时变系统。超稳定理论的一个重要应用领域是模型参考适应控制系统。
  
  对于线性定常系统,系统的超稳定性与其传递函数矩阵的正实性之间有着密切关系。澳大利亚学者B.D.O.安德森在1968年证明,系统的超稳定性等价于系统传递函数矩阵的正实性,系统的超渐近稳定性等价于系统传递函数矩阵的严格正实性。正实性和严格正实性是现代网络理论中的两个重要概念。一个传递函数矩阵G(s)为正实的条件是:①,其中宑是s的共轭复数变量,是G(s)的共轭复数矩阵;②G(s)在复变量s的右半开平面上解析,且在虚轴上仅有简单的极点,而对应这些极点的留数矩阵为正定埃尔米特矩阵;③G(s)+GT(s)在s的右半开平面为半正定埃尔米特矩阵,其中GT(s)为G(s) 的转置矩阵。在正实性的条件中,把条件②改为G(s)在包括虚轴在内的右半闭s平面上解析,把条件③改成为G(s)+GT(s)在右半闭 s平面上是正定埃尔米特矩阵,则相应地称传递函数矩阵是严格正实的。
  
  参考书目
   V.M.Popov, Hyperstability of Automatic Control Systems, Springer-Verlag, New York, Berlin,1973.

  

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