ID 原文 译文
24445 针对这一问题，该文采用联合Khatri-Rao子空间和块压缩感知(Khatri-Rao Subspace and Block Compressive Sensing, KRS-BCS)，提出一种差分SAR层析成像方法。 To deal with this issue, a method using differential SAR tomography based on Khatri-Rao Subspace and Block Compressive Sensing (KRS-BCS) is proposed.
24446 该方法依据目标的结构特性和重构观测矩阵具有的Khatri-Rao积性质，将稀疏结构目标的差分SAR层析成像问题转化为Khatri-Rao子空间下的BCS问题，最后对目标进行块稀疏的l1/l2范数最优化求解。 Using the structure information of the observed scene and Khatri-Rao product property of the reconstructed observation matrix, the proposed method changes the reconstruction of the sparse and structural observed scene into a BCS problem under Khatri-Rao Subspace, and then the KRS-BCS problem is efficiently solved with a block sparse l1/l2 norm optimization signal model.
24447 相比CS差分SAR层析成像方法，该方法不仅保持了CS差分SAR层析成像方法的高分辨率特点，而且其重构精度更高性能更优。 Compared with existing CS methods, the proposed KRS-BCS method not only maintains the high resolution characteristics of CS methods, but also has higher reconstruction accuracy and better performance.
24448 仿真数据和ENVISAT星载ASAR数据以及地面GPS实测数据的试验结果验证了该方法的有效性。 Simulations, ENVISAT-ASAR data and ground-based GPS data verify the effectiveness of the proposed method.
24449 针对当前持久性内存（PM，Persistent Memory）资源管理方案无法兼顾持久化特性和可字节寻址特性的问题，提出了一种融合 Linux 系统内核虚拟内存系统和文件系统的持久性内存统一管理系统 VMFS（Virtual MemoryFile System）。 Current resources management schemes of persistent memory cannot take advantage of data persistence and byte-address ability of PM (Persistent Memory) at the same time. We propose VMFS (Virtual Memory File System), a uni-fied management system based on the virtual memory subsystem and a file system of OS kernel.
24450 VMFS 中的单个 PM 分区可同时提供内存分配和文件存储服务，并利用内外存统一管理的特性可实现内存到文件的重映射机制，避免了不必要的数据拷贝，提升了文件读写性能，且维持了原生编程接口。 VMFS provides memory allocation and file storage services for applications using a single PM partition. Based on the unified management of virtualmemory and file storage, VMFS supports the data re-mapping between memory and files. As the re-mapping mechanism reduces the number of data copying times, file read and write latency performance is improved.
24451 实验结果表明，对比内外存分别使用 PM 的方案，VMFS 有效提升了文件读写性能。 The test results show that compared with the system using PM as memory and storage sperately, the proposed method can accelerate file reading and writing while the native system call interface was maintained.
24452 在两种实际工作负载下，VMFS 相对于使用DRAM（Dynamic Random Access Memory）和PM分别作为内存和存储的方案具有成本优势和一定程度的持久化性能提升。 Under two realistic workloads, VMFS also shows cost and performance advantages over the scheme using DRAM (Dynamic Random Access Memory) as memory and PM as storage.
24453 比特币引入了一种新的P2P(Peer to Peer)交易方法，并依靠其底层协议实现去中心化交易。 Bitcoin introduces a new P2P (Peer to Peer) trading method to the public and relies on its protocols to achieve decentralization.
24454 然而，由于目前缺乏对比特币各底层协议的细粒度形式化分析和系统建模，比特币安全性并未被保证。 However, due to the lack of fine-grained formal analysis and systematic modeling of bitcoin, the security of bitcoin protocols is not guaranteed.