| 1. | Optical fibres - measurement methods and test procedures - differential mode delay
光学纤维.测量方法和试验规程.模时延差 |
| 2. | Impacts of the difference between measurement transmission delays on state estimation and the countermeasures
量测量的时延差对状态估计的影响及其对策 |
| 3. | Differential group delay measurement of single - mode components and devices by the differential phase shift method
利用微分相移法进行单模元器件和装置的群时延差测量 |
| 4. | Base on the measurement of bearings and time - delays between different sensors , the equation of state and the equation of measurement are established
利用测得的方位序列和到达不同传感器的时延差，建立了状态方程和观测方程。 |
| 5. | Another constrained problem is delay and delay variation constrained multicast routing problem . sp - dvma ( shortest path delay variation multicast algorithm ) algorithm based on minimum delay path is presented
第二类是时延和时延差约束的多播路由问题，提出了以最短时延路径为基础的一种算法? ? sp - dvma算法。 |
| 6. | The effects of sediment parameters on the multi - path structure in shallow water are investigated in detail . a method of dividing the multi - path arrival time differences into groups is presented . theoretical analysis for the method is given
详细研究了沉积层声速、密度和衰减系数变化对浅海多途到达结构的影响，提出了对多途到达时延差进行分组的研究方法，从理论上对该方法进行了研究。 |
| 7. | The time complexity is low because only shortest paths connected to relay nodes is compared . simulation results show that fairly good cost performance is achieved . there is trade - off between complexity and performance
由于比较了通过中转节点后的最短路径，因此运算的复杂度大大降低，且通过仿真得到了较好的性能，仿真结果表明sp - dvma算法是一种低复杂度的时延和时延差约束的多播路由算法。 |
| 8. | The tracking method of interference delay is studied and simulated . referring to late - early loop gate , a method that applies to this system is proposed . slight adjustment of delay difference is done by interpolation , so the whole digital structure is obtained
以数字通信中的迟-早门环路为基础,提出了适用于pcma系统的跟踪环路,并且利用插值的方法实现了时延差的微调,得到全数字化的设计结构。 |
| 9. | An assumption is verified that the multi - path arrival time differences calculated by ray model is almost the same as that by normal mode model if higher frequencies for the source are used ( e . g . , frequencies range between 600hz and 1600hz ) . hi other words , the calculation of the multi - path arrival time differences by ray model is reliable . 2
该方法的研究结果验证了一个重要的假设：当信号频率较高时(例如600hz 1600hz ) ，用声线模型计算多途到达时延差与简正波模型得到的结果基本一致，并且声线模型计算多途到达时延差具有较高的可信度。 |
| 10. | And the solutions of the three problems above are discussed : the solution to the simulcast interfering which is caused by the simulcast delay spread ( sds ) and the zero - beating is given in chapter four . based on the well understanding of the principle of ms - i / h / 0 in ipnp , the examples are given in chapter five on how to solve the problem of communication interruption between paging zones . through the analyse of signal switching between chengdu and deyang , the synchronization error between flex frames , and the bug in the multi - frequency roaming principle are pointed out
通过以上分析，文章探讨了对上述三个问题的解决： ?对同播干扰问题，分别分析了时延差和零拍频所造成同播干扰的客观存在，探讨了系统设计和网络优化的基本方法； ?对ipnp联网障碍，提出了在掌握ipnp对各pncc作为输入局归属局?输出局( ms ? i h o )的灵活定义、以及相关参数配置原理的基础上，分析联网障碍的思路； ?对信号切换障碍，以成都和德阳两地的局部广域覆盖为例，分析了flex帧失步和flex多频漫游原理设计缺陷的客观存在，并探讨了相关的解决方法和建议。 |
