We report an all-fiber high power, single frequency large-mode area (LMA) linearly polarized ytterbiumdoped fiber amplifiers (YDFA) module, which is based on the master oscillator multi-stage power amplifiers (MOPA). The maximum output power is 43.8 W at a wavelength of 1064 nm when 60-W launched pump light is coupled, with high slope efficiency of 88%, polarization extinction rate (PER) >17.2 dB and nearly diffraction-limited beam quality (M2<1.1).

在这项工作中，我们考虑了非线性/非高斯系统中的状态估计问题。 本文基于高阶无味卡尔曼滤波器（HUKF），开发了一种新的高斯和估计算法。 针对HUKF，提出了一种sigma点选择方法，高阶无味变换（HUT）技术，该方法可以更精确地近似高斯分布。 我们介绍了高斯滤波器的系统公式，并开发了最优滤波器的高效和准确的数值积分。 然后，我们继续将HUKF的使用扩展到具有加性（可能是非高斯）噪声的离散时间非线性系统。 所得的滤波算法称为高斯和高阶无味卡尔曼滤波器（GS-HUKF），将预测和后验密度近似为有限数量的高斯密度加权和。 在理论分析和仿真中证实了所提出的高斯和HUKF在非线性非高斯滤波问题的计算精度和时间复杂度方面具有综合优势。

本文提出用不同离焦的高分辨电子显微像光学方法叠加,改善带有非旋转对称像差的电子显微像相位衬度传递的数.使叠加后传递函数在全场区域同相位,并使传递函数的零值由另一传递函数的峰值填补,改善了电子显微像的像质.

A scheme for the photonic generation of frequency-tunable millimeter wave and terahertz wave signals based on a highly flat optical frequency comb is proposed and demonstrated experimentally. The frequency comb is generated using two cascaded phase modulators (PMs) and an electro-absorption modulato

模块化高温气冷核React堆（MHTGR）被视为下一代核电站的最佳候选人之一。 直通式蒸汽发生器（OTSG）对于任何带有蒸汽循环的MHTGR发电厂都是至关重要的。 为了保证电厂的有效和安全运行，必须对OTSG的出口蒸汽温度进行控制。 提出了饱和输出反馈耗散控制（SOFDC）定律，用于调节OTSG的出口蒸汽温度，并给出了相应的鲁棒性分析。 在数值研究中，将SOFDC应用于中国高温气冷堆卵石床模块（HTR-PM）项目OTSG的出口蒸汽温度控制。 数值仿真结果表明，该调节器不仅可行，而且控制性能良好，并讨论了其参数对调节性能的影响。

Pairing computation on Edwards curves with high-degree twists

Photonics-based radar with a photonic de-chirp receiver has the advantages of broadband operation and real-time signal processing, but it suffers from interference from image frequencies and other undesired frequency-mixing components, due to single-channel real-valued photonic frequency mixing. In this paper, we propose a photonics-based radar with a photonic frequency-doubling transmitter and a balanced in-phase and quadrature (I/Q) de-chirp receiver. This radar transmits broadband linearly fr

Single-nanowire solar cells with a unique light-concentration property are expected to exceed the Shockley–Queisser limit. The architecture of single nanowire is an important factor to regulate its optical performance. We designed a trilobal silicon nanowire (SiNW) with two equivalent scales that possesses superior light-absorption efficiency in the whole wavelength range and shows good tolerance for incident angle. The electric field distribution in this geometry is concentrated in the blade wi

为了从高分辨率遥感影像中高精度的提取各种工业固体废物，提出了基于支持向量机（ＳＶＭ）的工业固体废物特征快速提取算法，首先对遥感影像进行各向异性扩散滤波，然后针对高分辨率遥感影像信息量丰富和工业固体废物堆复杂度高的特点，提出基于1-v-1的SVM的多种工业固体废物的多分类策略，在提高精度的同时，兼顾了工业固体废物特征识别的效率。研究结果表明：ＳＶＭ对工业固体废物判别能力比常规方法有更强的优势，从遥感影像中不仅能准确地辨别出工业固体废物堆的线形特征，还能识别出其材质和类型；该算法能同时识别出多种工业固体废物，执行效率更高。

This paper proposes a new method to weight subspaces in feature groups and individual features for clustering high-dimensional data. In this method, the features of high-dimensional data are divided into feature groups, based on their natural characteristics. Two types of weights are introduced to the clustering process to simultaneously identify the importance of feature groups and individual features in each cluster. A new optimization model is given to define the optimization process and a ne