Rapid advancements in flexible electronics technology propel soft tactile sensing devices toward high-level biointegration, even attaining tactile perception capabilities surpassing human skin. However, the inherent mechanical mismatch resulting from deficient biomimetic mechanical properties of sensing materials poses a challenge to the application of wearable tactile sensing devices in human–machine interaction. Inspired by the innate biphasic structure of human subcutaneous tissue, this study discloses a skin-compliant wearable iontronic triboelectric gel via phase separation induced by competitive hydrogen bonding. Solvent-nonsolvent interactions are used to construct competitive hydrogen bonding systems to trigger phase separation, and the resulting soft-hard alternating phase-locked structure confers the iontronic triboelectric gel with Young's modulus (6.8–281.9 kPa) and high tensile properties (880%) compatible with human skin. The abundance of reactive hydroxyl groups gives the gel excellent tribopositive and self-adhesive properties (peel strength > 70 N m-1). The self-powered tactile sensing skin based on this gel maintains favorable interface and mechanical stability with the working object, which greatly ensures the high fidelity and reliability of soft tactile sensing signals. This strategy, enabling skin-compliant design and broad dynamic tunability of the mechanical properties of sensing materials, presents a universal platform for broad applications from soft robots to wearable electronics.

针对激光二极管(LD)光源光束窄、发散角小、出光功率受阻和对准困难等问题, 提出了一种基于商业蓝光发光二极管(LED)的深海高速无线光通信系统, 并对系统在10 m、50 m的一类海水信道中分别进行实验与仿真。结果表明: 为了保证系统误码率低于10-3, 当水下信道长10 m时, 数据传输速率可达500 Mb/s; 当水下信道长50 m时, 数据传输速率可达20 Mb/s。

We present a new structure of nearly-zero flattened dispersion and highly nonlinear photonic crystal fiber (PCF) in the telecommunication window. This fiber design is comprised of a hybrid-core region with -bismuth-doped region in the center and three lower bismuth-doped regions in the first ring that enables dispersion control while maintaining a high nonlinear coefficient. Numerical analysis results show that the proposed PCF is achieved with a nonlinear coefficient of about 3301 W-1 km-1, a dispersion value of about 0.5537 ps/(nm·km) at 1550 nm, and nearly-zero flattened dispersion fluctuating within 2.5 ps/(nm·km) ranging from 1.496 to 1.596 μm.

提出了一种对稠油热采井下光纤非本征法布里珀罗干涉型(EFPI)永久压力传感器采集的压力信号进行小波多分辨率降噪的方法，可有效抑制传感器采集压力信号中的非平稳噪声。提出了一种基于信噪比(SNR)提升的小波分解层数确定方法，无需真实压力信号频率范围的先验知识，可通过扫描信噪比提升随小波分解层数的变化估计最优小波分解层数。在新疆某油田稠油热采井的现场试验结果表明，该方法可提高压力信号信噪比约2.6 dB，且降噪后压力信号可显著提高对油田稠油热采井原油日产量的预测准确度。