ID 原文 译文
2823 多标签碰撞问题被认为是射频识别系统中的一个关键问题。 Multi-tags collision has been considered as a critical problem in RFID system.
2824 近来，许多基于比特追踪技术的查询树算法被提出用于有效的解决标签碰撞问题， Recently, many query treeprotocols based on bit tracking technology have been presented for resolving the tag collision efficiently.
2825 然而由于无用的碰撞比特信息和空闲时隙的存在，这些查询树算法的性能都有待进一步提升。 However, their per-formance need to be further improved because of unused collided bits and idle slots.
2826 本文提出了一种基于比特查询的查询方法，该算法使得标签返回一个映射过比特串来取代原始的ID 序列。 In this paper, a bit query based methodis presented, which requires the tag to respond a mapped bit string instead of its ID sequence.
2827 同传统的 ID 查询相比较，比特查询不仅可以消除空闲查询还可以将碰撞标签分成更多子集并充分利用碰撞比特信息。 Compared with traditional IDquery, it not only eliminate idle queries, but also can separate collided tags into many smaller subsets and make full use of the collided bits as well.
2828 基于该比特查询方法，我们提出了一种基于比特查询的多进制树(Bit query based M-ary tree，BQBMT)新型查询树算法，它通过多进制树迭代的分离碰撞，并通过比特查询模式和 ID 查询模式之间的最佳切换来快速识别标签。 Based on this method, a novel query tree protocol bit query based M-ary tree(BQBMT)is pro-posed, which recursively resolves collisions by forming a M-ary tree, and optimally switches from bit query mode to ID que-ry mode for quickly identifying the tags when tag is readable.
2829 理论分析和仿真结果显示，BQBMT 算法的的系统效率接近 0.89，超过了现有的 QT 算法和混合防碰撞算法。 Theoretical analysis and simulation results show that the sys-tem efficiency of BQBMT is close to 0. 89, which outperforms the other existing QT-based and hybrid algorithms.
2830 在分布式光伏发电系统中，光伏电池一般通过 DC-DC 变换器与后级相连，以实现输出最大功率跟踪(MPPT)。 In distributed photovoltaic(PV)generation systems, PV cells are in general connected to downstream powerstage through interfacing DC-DC converters to fulfill maximum power point tracking (MPPT).
2831 由于光伏电池的本质电流源特性，使得输入电压反馈控制光伏接口 MPPT 变换器为电流源变换器，会呈现出与常见电压源变换器截然不同的动态特性。 Due to inherent current-source nature of the PV cell, the input voltage controlled PV-interfacing MPPT converter will become a current-fed(CF)con-verter which shows distinct dynamic features from those of the usual voltage-fed(VF)converters.
2832 以前置电容 Boost 变换器为研究对象，重点探讨电流源 MPPT 变换器的频率响应特性。 In this regard, taking the Boost converter with an input capacitor as the case of study, this paper aims to investigate frequency responses of the CFMPPT converter.