Actively Perceiving and Responsive Soft Robots Enabled by Self‐Powered,Highly Extensible,and Highly Sensitive Triboelectric Proximity‐ and Pressure‐Sensing Skins

Robots that can move, feel, and respond like organisms will bring revolutionary impact to today's technologies. Soft robots with organism‐like adaptive bodies have shown great potential in vast robot–human and robot–environment applications. Developing skin‐like sensory devices allows them to naturally sense and interact with environment. Also, it would be better if the capabilities to feel can be active, like real skin. However, challenges in the complicated structures, incompatible moduli, poor stretchability and sensitivity, large driving voltage, and power dissipation hinder applicability of conventional technologies. Here, various actively perceivable and responsive soft robots are enabled by self‐powered active triboelectric robotic skins (tribo‐skins) that simultaneously possess excellent stretchability and excellent sensitivity in the low‐pressure regime. The tribo‐skins can actively sense proximity, contact, and pressure to external stimuli via self‐generating electricity. The driving energy comes from a natural triboelectrification effect involving the cooperation of contact electrification and electrostatic induction. The perfect integration of the tribo‐skins and soft actuators enables soft robots to perform various actively sensing and interactive tasks including actively perceiving their muscle motions, working states, textile's dampness, and even subtle human physiological signals. Moreover, the self‐generating signals can drive optoelectronic devices for visual communication and be processed for diverse sophisticated uses.     

基于DSP的智能断路器合闸线圈保护装置

针对电网公司运行的高压断路器合闸线圈长期频繁故障,导致损失电网负荷,增加电网运行风险,降低供电可靠性的现象,研发了一种基于DSP的新型智能断路器合闸线圈保护装置。相对于传统的断路器合闸线圈保护装置,采用了单独的外接式电源,通过程序智能的判断断路器的运行状态,当断路器发生故障或者不满足合闸要求时,保护装置智能的切换断路器的控制回路,以达到保护合闸线圈的目的。此外,装置完全独立于断路器的控制回路,对原断路器的控制回路不造成任何干扰。即使保护装置发生异常,也不会对断路器的正常运行造成影响。     

响应曲面法优化碳酸锂反应结晶工艺

碳酸锂是制备各种锂化合物的基础锂盐,碳酸锂的制备是锂产业链当中的承前启后的关键技术。以察尔汗盐湖老卤为原料,采用响应曲面法中的central composite design（CCD）设计实验,分别考察了温度、碳酸钠加料速度、碳酸钠浓度和锂离子浓度4个因素及交互作用对反应结晶工艺中碳酸锂的收率和粒度的影响,并分别建立了响应值与影响因素之间的回归方程。响应预测最佳值为：碳酸锂收率93.68%、粒径（d₅₀）16.73 μm;相应的实验值分别为94.01%和16.91 μm。预测值与实验值接近,误差较小,说明响应曲面法建立的预测碳酸锂反应结晶的模型可靠,在最佳工艺条件下分析所制得的产品,用ICP-AES分析纯度为99.52%,用XRD分析基本无杂峰,说明反应结晶生成Li₂CO₃晶体,其主要晶面为（-1 1 0）、（-2 2 0）和（0 0 2）。     

补偿反磨削凸轮靠模的方法

本文从标准轴（原始靠模）的选择与制造、靠模的“反靠”、凸轮的磨削、标准凸轮补偿量的确定和“补偿反靠”的工艺程序等方面，论述了凸轮靠模“补偿反靠”的制造方法。     

用坐标法测量螺纹量规的中径及误差分析

通过测量任意相邻三个牙型上的三点获得螺纹量规中径的方法,符合GB／T14791－93《螺纹术语》中的中径定义,不存在明显误差,操作过程简便。误差分析表明,螺距误差、牙型半角误差对中径测量及单一中径测量没有影响。     

考虑底部框架共同作用下单层网壳几何非线性动力时程分析

以K8型网壳为研究对象,系统地研究了地震荷载作用下底部框架结构对网壳结构的影响。依据非线性有限元理论,利用ANSYS程序,分析了考虑底部框架共同作用的网壳结构的几何非线性动力性能。通过分析,对考虑底部框架共同作用的单层网壳结构在地震荷载作用下的动力响应有了较全面的了解。     

基于Netlinx网络架构技术的干冰（CO2）烟丝膨胀系统

本文介绍了烟草行业千冰（CO2）烟丝膨胀线工艺原理，涉及到的安全等因素让企业在选择可靠的电控技术上慎之又慎。在详细了解Netlinx网络技术后，它的种种优点成为我们实现设备控制的第一选择。实施过程让我们感受到Netliiqx网络带来的强大与方便，文章在最后还简要介绍了第三方软件和Netlinx网络便捷的通讯和设置。     

Impact of Dispersion on Dynamics of a Discrete Metapopulation Model

We propose and analyze a discrete time model for metapopulation on two patches with local logistic dynamics. The model carries a delay in the dispersion terms, and our results on this model show that the impact of the dispersion on the global dynamics of the metapopulation is complicated and interesting: it can affect the existence of a positive equilibrium; it can either drive the metapopulation to global extinction, or prevent the metapopulation from going to global extinction and stabilize a positive equilibrium; it can also destabilize a positive equilibrium or a periodic orbit.