An algorithm to detect carrier frequency of DS signals based on blind source separation;
一种基于盲源分离的直扩信号载频检测算法
Research on coded digital signal carrier frequency;
叠加数字信号载频选择的研究
Blind estimation of MPSK carrier frequency;
MPSK信号载频盲估计
Experiments on strain pseudoelastic property of shape memory alloy(SMA) were carried out and the Influence of temperature,cyclic number and loading frequency on pseudoelastic property of SMA were investigated.
对形状记忆合金(Shape Memory Alloy,简称SMA)的超弹性特性进行了试验研究,得到了SMA的超弹性特性随环境温度、循环加载圈数以及加载频率等因素的变化规律,为进一步开发SMA被动阻尼器奠定了基础。
The frequency of strain burst, the amplitude of strain bursts, B, and the shear stress drop, D, were discussed in terms of the applied strain amplitude and cyclic loading frequency.
研究了应变幅和加载频率对［123］Cu－16％Al单晶在循环形变中的应变突发行为的影响。
Fatigue crack growth behavior of DZ17G at room temperature is studied at different testing conditions of loading direction and loading frequency.
研究了定向凝固高温合金ＤＺ１７Ｇ在不同加载取向及加载频率条件下的室温疲劳裂纹扩展行为。
The results show that there are obvious relationships between the temperature response and the microscopic shape,furthermore,the stress level and the load frequency effect the change of the surface temperature.
研究结果表明:试样表面温度的变化与表面微观形貌的变化具有明显的相关性,并受应力水平及加载频率的影响,表面最高温升与加载频率呈线性关系;试样断口出现明显的裂纹扩展区和瞬断区,且随着应力水平及加载频率的增加而形成较大的瞬断区及较多的韧窝。
The present paper examines the influence of load frequency on crack growth rate in titanium at elevated temperature and attempts to analyze this effect theoretically.
由于材料或环境的因素，加载频率对疲劳裂纹扩展速率将产生很大的影响以工业 Ｔｉ为对象，研究了中等温度环境下疲劳裂纹扩展性能及加载频率的影响，并用弹、粘塑性理论对其进行了理论上的探讨基于该理论导出的本构关系和利用有限元方法，对裂纹尖端的应力应变进行了分析结果表明，粘塑性应变范围和Ｊ积分范围可作为裂纹扩展的控制参数，能很好地反映加载频率对裂纹扩展的影
In the light of these characteristics, the paper deduces the cyclic spectrum of UQPSK, and puts forward an algorithm for carrier-frequency capture based on cyclostationarity.
针对这一特性,文中给出了UQPSK信号的循环谱,提出了基于循环平稳特性的载频获取算法。