一种适于多电平调信号均衡的神经网络

在二电平信号下基于多层感知器ＭＬＰ（Ｍｕｌｔｉ Ｌａｙｅｒ Ｐｅｒｃｅｐｔｉｏｎ）的均衡器（ＭＬＰＥ）性能远远传于传统的线性模向均衡器ＬＴＥ（Ｌｉｎｅａｒ Ｔｒａｎｓｖｅｒｓａｌ Ｅｑｕａｌｉｚｅｒ）。但在多电平调制信号下，ＭＬＰＥ性能迅速下降，其主要原因在于激活函数的选择。文中提出了一种适于多电平信号均衡的神经网络模型－－分段多层感知器ＳＭＬＰ（Ｓｅｇｍｅｎｔ Ｍｕｌｔｉ Ｌａｙｅｒ Ｐｅｒｃｅ     

Sign Language Synthesis in Multi-function Perception Machine

ＳｉｇｎＬａｎｇｕａｇｅＳｙｎｔｈｅｓｉｓｉｎＭｕｌｔｉ┐ｆｕｎｃｔｉｏｎＰｅｒｃｅｐｔｉｏｎＭａｃｈｉｎｅＸＵＬｉｎＧＡＯＷｅｎ（徐琳）（高文）（Ｄｅｐｔ．ｏｆＣｏｍｐｕｔｅｒＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＨａｒｂｉｎＩｎｓｔｉｔｕｔ...     

Mechanism of Flowing Stop of Al-Si Alloys in EPC Process

ＭｅｃｈａｎｉｓｍｏｆＦｌｏｗｉｎｇＳｔｏｐｏｆＡｌ－ＳｉＡｌｌｏｙｓｉｎＥＰＣＰｒｏｃｅｓｓＷＥＩＺｕｎｊｉｅ；ＡＮＧｅｙｉｎｇ（魏尊杰，安阁英）（ＳｃｈｏｏｌｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅ．ａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ｈａｒｂｉｎｉｎｓｔ...     

Research on Extrude-bulge Forming of Tee Tubes with Plastic Medium

ＲｅｓｅａｒｃｈｏｎＥｘｔｒｕｄｅ－ｂｕｌｇｅＦｏｒｍｉｎｇｏｆＴｅＴｕｂｅｓｗｉｔｈＰｌａｓｔｉｃＭｅｄｉｕｍＷＡＮＧＣｈｅｎｌｕＬＵＹａｎ（王成录）（吕炎）（Ｓｃｈ．ｏｆＭａｔｅｒｉａｌＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｒｉｎｇ，ＨａｒｂｉｎＩｎｓ...     

A Stable and Efficient Method for Drawing Section Linecs

ＡＳｔａｂｌｅａｎｄＥｆｆｉｃｉｅｎｔＭｅｔｈｏｄｆｏｒＤｒａｗｉｎｇＳｅｃｔｉｏｎＬｉｎｅｃｓ￥（王永洁）（徐世新）ＷＡＮＧＹｏｎｇｊｉｅＸＵＳｈｉｘｉｎ（Ｄｅｐｔ．ｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＨａｒｂｉｎＩｎｓｔｉｔｕｔｅｏｆ...     

Multimodal Expression—Synthesis of Facial Emotion,Mouth Movement and Voice

ＭｕｌｔｉｍｏｄａｌＥｘｐｒｅｓｉｏｎ—ＳｙｎｔｈｅｓｉｓｏｆＦａｃｉａｌＥｍｏｔｉｏｎ，ＭｏｕｔｈＭｏｖｅｍｅｎｔａｎｄＶｏｉｃｅＺＨＡＮＧＪｉｎｇＧＡＯＷｅｎＣＨＥＮＸｉｌｉｎ（张晶）（高文）（陈熙霖）（Ｄｅｐｔ．ｏｆＣｏｍｐｕｔｅｒＳｃｉｅｎ...     

The 2D Fundamental Solutions in BEM Applied for Piezoelectric Materials

Ｔｈｅ２ＤＦｕｎｄａｍｅｎｔａｌＳｏｌｕｔｉｏｎｓｉｎＢＥＭＡｐｐｌｉｅｄｆｏｒＰｉｅｚｏｅｌｅｃｔｒｉｃＭａｔｅｒｉａｌｓ￥（孟庆元）（杜善义）ＭＥＮＧＱｉｎｇｙｕａｎ；ＤＵＳｈａｎｙｉ（Ｄｅｐｔ．ｏｆＡｓｔｒｏｎａｕｔｉｃｓａｎｄＭｅｃｈａｎｉｃ...     

Effect of Strain－Rate Sensitivity on Deformation Localization in Porous Materials

ＥｆｆｅｃｔｏｆＳｔｒａｉｎ－ＲａｔｅＳｅｎｓｉｔｉｖｉｔｙｏｎＤｅｆｏｒｍａｔｉｏｎＬｏｃａｌｉｚａｔｉｏｎｉｎＰｏｒｏｕｓＭａｔｅｒｉａｌｓＳＵＮＹｉ（孙毅）（Ｄｅｐｔ．ｏｆＡｓｔｒｏｎａｕｔｉｃｓａｎｄＭｅｃｈａｎｉｃｓ，Ｈａｒｂｉｎｉｎｓｔｉ...     

Effects of Matrix on Tensile Strength of SiCw/Al Composites

ＥｆｆｅｃｔｓｏｆＭａｔｒｉｘｏｎＴｅｎｓｉｌｅＳｔｒｅｎｇｔｈｏｆＳｉＣｗ／ＡｌＣｏｍｐｏｓｉｔｅｓ￥（耿林）（王德尊）（姚忠凯）ＧＥＮＧＬｉｎ；ＷＡＮＧＤｅｚｕｎ；ＹＡＯＺｈｏｎｇｋａｉ（Ｄｅｔｐ．ｏｆＭａｔｅｒｉａｌＳｃｉｅｎｃｅａｎｄＥｎｇｉ...     

Comprehensive Analysis of Stress-Strain in Typical Metal Forming Processes

ＣｏｍｐｒｅｈｅｎｓｉｖｅＡｎａｌｙｓｉｓｏｆＳｔｒｅｓｓ－ＳｔｒａｉｎｉｎＴｙｐｉｃａｌＭｅｔａｌＦｏｒｍｉｎｇＰｒｏｃｅｓｓｅｓ￥（王仲仁）ＷＡＮＧＺｈｏｎｇｒｅｎ（Ｄｅｐｔ．ｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ｈａ...     

下行4×2 LTE系统中混合MIMO传输模式的均衡器设计及其系统性能仿真

为了能给实际下行LTE系统接收器设计提供有效的先验信息,考虑下行4×2高阶MIMO天线配置,首先给出了LTE系统下行混合M IMO传输模式的接收信号模型,并且根据MMSE准则和MRC准则分别设计出不同均衡器来抑制这种混合干扰;同时为了提高系统仿真效率,推导出了基于信道响应矩阵随机扰动的信干噪比修正公式。最后通过仿真给出混合MIMO传输模式下,不同模式目标用户的吞吐量变化曲线,结果表明,MMSE均衡器相比MRC均衡器有更大的性能增益,对实际LTE系统的性能分析有较高的参考价值。     

基于滤波多音调制系统的辅助判决均衡器

提出的辅助判决均衡器在用于滤波多音调制系统时，可克服判决反馈均衡器在多径信道下的地板效应. 同时结合因子图理论给出了辅助判决均衡器的二次判决实现算法，在复杂度增加不大的情况下，解决了其物理可实现性问题.仿真试验表明，辅助判决均衡器在滤波多音调制系统中的性能优于判决反馈均衡器.     

一种应用三阶倒谱的盲均衡新算法

提出了一种基于系统输出三阶倒谱的非最小相位信道盲均衡新算法,由该算法构成的盲均衡器可适用于多电平通信系统。首先利用非对称性变换改变传送信号的对移分布特性,然后利用系统的三阶倒谱方程分别求出信道的最大和最小相位分量,在此基础上构成盲 均衡器。     

不同插值方法在断层检测模型中的应用效果对比分析

为了了解同一断层检测模型在不同插值方法下的检测效果和同一插值方法在不同断层检测模型的检测效果.对比视觉几何组VGG(Visual Geometry Group)、多层感知机MLP(Multi--layper Perceptron)、支持向量机SVM(Support Vector Machine)三种断层检测模型在lin...     

Constant modulus semi-blind space-time equalizer based on structure risk minimum criterion

A new adaptive filtering principle based on capability control and semi-blind method is presented. A new semi-blind space-time equalizer based on constant modulus characteristic and structure risk minimum （SRM） criterion is also proposed. The equalizer sufficiently exploits the learning information of communication signals by using the structure information of filter itself through capability control technique. Namely, it maximizes the amount of learning information to im- prove filter tracking performance. Simulations are carried out and the result is compared with that of typical recursive least squares space-time equalizer （RLS-STE） and constant modulus semi-blind space-time equalizer （ CM-SB-STE ）. The results show that, even if with insufficient training data, the SRM constant modulus semi-blind space-time equalizer （SCM-SB-STE） keeps good tracking per- formance, showing promises in mobile wireless communications.     

一种新的CMA-DFE盲均衡方法

提出了一种新的常数模(CMA)盲均衡方法，误差性能表面(EPS)分析表明其收敛性优于常用的CMA2-2方法。为进一步减小稳态失调误差，采用峰度判决机制，一旦检测到眼图张开即转入判决反馈均衡(DFE)工作方式。仿真实验证实了该方法的有效性。     

Ab initio Study of Tunable Band Gap of Monolayer and Bilayer Phosphorene by the Vertical Electronic Field

Using the ab initio plane-wave ultrasoft pseudopotential method based on generalized gradient approximation(GGA),we investigated the band-gap tuning in monolayer phosphorene(MLP) and bilayer phosphorene(BLP) by external electric fields applied perpendicular to the layers.The band continuously decreases with increasing applied electric fields,eventually rendering them metallic.For MLP,the phenomenon is explained in the light of the giant Stark effect,which is essentially characterized by the interlayer spacing,for the rate of change of bandgap with applied external field.The atomic distance and charges also contribute to the semiconductor-metal transition.The BLP is more sensitive to electric fields than MLP,since their charges are rearranged among bilayers and the bandgap can dramatically drop in terms of electronic field.The results show the bandgap will change for the fabrication of novel electronic and photonic devices.     

采用SRM准则的盲均衡器

提出了一种新的采用结构风险最小化（SRM）准则的盲均衡器（SRM-BE）。该方法根据信号的特征恢复思想,以SRM为准则构造具有时间去相关特性的代价函数,采用静态迭代学习算法在线跟踪信道。通过仿真实验,并与采用最小均方误差准则的盲均衡器（LMS-BE）和采用神经网络的盲均衡器（NN-BE）进行比较,结果表明该方法的非线性均衡性能最佳。     

Adaptive blind equalizer based on least square support vector machine

An adaptive blind support vector machine equalizer ( ABSVME ) is presented in this paper.The method is based upon least square support vector machine ( LSSVM ),and stems from signal feature reconstruct...     

基于维特比算法和最小均方算法的自适应判决反馈均衡性能比较

对AWGN信道下具有串扰的通信系统进行了基于维特比算法和最小均方算法(LMS)自适应判决反馈均衡的计算机仿真.然后对它们的性能曲线进行了分析,得出基于维特比的最大似然估计法(MLSE)在对抗码间串扰时要优于基于LMS算法的自适应反馈均衡法的结论.