排序方式: 共有26条查询结果,搜索用时 453 毫秒
1.
2.
3.
4.
Mesh结构是目前最普遍的多核系统架构,得到了广泛的应用,但受结构制约,Mesh网络并不适用于某些嵌入式应用工作。基于上述考虑,本文提出了一种簇结构的多核系统架构设计与实现过程,详细介绍了簇的结构组成,簇内外通讯机制,并使用矩阵连乘验证了设计结果的正确性,簇型多核系统的性能可以达到单核处理器的2.31倍。 相似文献
5.
A robust airfoil optimization platform is constructed based on the modified particle swarm optimization method (i.e., the
second-order oscillating particle swarm method), which consists of an efficient optimization algorithm, a precise aerodynamic
analysis program, a high accuracy surrogate model, and a classical airfoil parametric method. There are two improvements for
the modified particle swarm method compared with the standard particle swarm method. First, the particle velocity is represented
by the combination of the particle position and the variation of position, which makes the particle swarm algorithm a second-order
precision method with respect to the particle position. Second, for the sake of adding diversity to the swarm and enlarging
the parameter searching domain to improve the global convergence performance of the algorithm, an oscillating term is introduced
to the update formula of the particle velocity. At last, taking two airfoils as examples, the aerodynamic shapes are optimized
on this optimization platform. It is shown from the optimization results that the aerodynamic characteristic of the airfoils
is greatly improved in a broad design range. 相似文献
6.
7.
为了便于工程化生产与设备维护,采用频率补偿匹配网络的电路结构,设计3种小型化模块化的低噪声放大器,外形尺寸为12.7 mm×12.7 mm×2 mm,工作频段分别为1.1~1.7 GHz、1.7~2.4GHz和2.4~3.0 GHz。基于单个晶体管ATF-54143进行电路直流偏置、输入输出匹配和稳定性等设计,运用EDA工具ADS对放大器进行线性与非线性性能仿真,对印制板进行电磁场与电路的混合仿真及元件参数优化。完成放大器的装配、调试与测量,实测噪声系数〈1.5 dB,增益平坦度〈2.2 dB,满足设计要求。 相似文献
8.
9.
According to the epidemic state, propagation mode and transformation between HBV infection states,the Hepatitis B Virus (HBV) infection with impulsive vaccination and time delay are modelled and analyzed. The control methods of impulsive vaccination and active therapy are adopted. By using comparative theorem of impulsive differential equation, the sufficient conditions that Hepatitis B Virus will be eliminated eventually or be persistent are derived. 相似文献
10.