| 1. | Analysis and modeling for the sub - harmonic load pull characteristics of the cdma power amplifier
功放电路副谐波负载牵引特性与建模研究 |
| 2. | The main original work is as the followings : 1 . longitudinal vibration of an integral pile in an uniform soil with end bearing boundary or elastic bottom boundary undergoing vertical harmonic load is theoretically investigated
主要工作如下： 1 、分别对均质土中完整端承桩和弹性支承桩在垂直谐和激振力作用下的纵向振动特性进行了研究。 |
| 3. | Traditional energy meter can cause errors under the condition of harmonics due to its structural characters , and at the same time harmonic loads take in foundational power and send out harmonic power . this paper proposes a new way and realizes accuracy and fair energy metering
传统的电能表在谐波存在下由于自身的结构特性会产生误差，就此进行分析提出了新的电能计量方法，应用虚拟仪器技术实现了准确、公平、合理的电能计量。 |
| 4. | Choosing of parameter for damped reducer is then presented , and its nature is compared . the best effective reducer is chosen based on actual condition . at last , one suffered harmonic load steel beam is applied by high damping spring tmd to reduce vibration , and experiment results indicate that tmd with high damping spring performs better
接着提出了阻尼吸振器新的参数选择方法，对无阻尼吸振器和阻尼吸振器的性能进行了比较，根据具体情况，选择吸振效果最佳的吸振器类型。 |
| 5. | It is discussed that the present harmonic analyzers do n ' t satisfy the requirements of china standard for harmonic measure of quick disturbance harmonic load . the measurement error brought about by the harmonic analyzers adopting ft or fft algorithm is analyzed . a cycle discrete fourier algorithm that should n ' t be effected by aperiodic component is presented , and the results of simulation show that it has higher accureacy
本文对电力系统谐波的测量方法，数据处理及电力牵引负荷对电力系统的影响进行了研究，论述了目前国内外生产的谐波分析仪用于快速波动谐波负荷的测量不满足国标的要求，分析了谐波分析仪普遍采用的ft或fft算法所产生的测量误差，提出了一种不受非周期分量影响的全周波离散傅里叶算法，仿真结果表明精度好。 |
| 6. | In the dissertation , a systematic study on the 3 - d dynamic responding of transversely isotropic saturated half - space / layered saturated strata produced by harmonic loading and seismic loading and dynamic interaction of saturated soils - foundation ( circular plate ) based on biot ' s theory for fluid - saturated porous media and the model of elastic half - space
本文基于biot两相介质波动理论，采用横观各向同性饱和半空间及横观各向同性饱和有限层地基模型，对饱和地基的三维动力响应及横观各向同性饱和地基?基础(板)的动力相互作用进行了系统研究。 |
| 7. | Therefore , the power department and users are concerned aboui harmonic and reactive compensation . the power department usually manage compute and measure the electric net " s harmonic condition and connected or new - connected harmonic load . and need to measure the harmonic vol tage current in some electric net " point . then , by manual making an in - depth analysis and statistics on measured - data , it can reduce harmonic harm on public not to take some effective measures
电力部门通常在实际中，需要对电网的谐波状况、已接入和新接入系统的谐波源负荷进行管理、计算及测量，需要对电力网络各点的谐波电压、电流实际水平进行测试，然后对测试数据进行人工分析统计，并以此采取相应措施降低或减少谐波对电网的危害。 |
| 8. | Fourthly , the solutions for non - axisymmetical dynamic responding of elastic circular plate ( thin and thick plate ) rested on transversely isotropic saturated half - space / layered ground subjected to arbitrary harmonic loading are presented . under the contact conditions , the problem leads to a pair of dual integral equations which describs the mixed boundary - value problem
首先建立直角坐标系下波动问题的状态方程，经双重fo吐er变换求解状态方程后得到传递矩阵:利用递矩阵给出直角坐标系下层状横观各向同性饱和地基在任意分布简谐荷载作用下稳态动力响应的一般解。 |
| 9. | In the last , the modern control theory and simulink in matlab have been integrated together , and it has been applied in active control of the platform structure elastically supported ; a mechanical model and an equation of motion in state space have been established . based on coc , dynamic response of the platform structure elastically supported has been studied under simple harmonic load ; the influence of different values of weight function to the active control efficiency of the structure has also been discussed
本文还将现代控制理论与matlab的simulink动态仿真软件包相结合，将其应用于弹性支承平台结构的主动控制中；建立了弹性支承平台结构主动控制理论的力学模型和状态空间内的运动方程；应用经典线性最优控制算法对弹性支承平台结构在简谐荷载作用下的动力响应进行闭环控制；分别从理论和数值计算两个方面讨论了状态权函数矩阵q和控制权函数矩阵r的不同取值对控制效果的影响。 |
