All‐Inorganic Ionic Polymer‐Based Memristor for High‐Performance and Flexible Artificial Synapse

The implementation of memristors that are wearable and transparent has attracted significant attention. However, the development of high‐performance memristors that simultaneously possess high flexibility and environmental stability has remained a tremendous challenge suffering from limited choice of materials with both good ion‐electron mobility and structural flexibility. Inspired by the unique poly‐ionic nature of ammonium polyphosphate (APP), a novel Au/APP/ITO memristor with favorable flexibility and stability is prepared. Synaptic behaviors can be stimulated by voltage pulses that are 20 ns in width, 0.1 V in amplitude, and repeatable under 10⁴ pulse cycles, thereby outperforming several other benchmark memristors. Further, the device, prepared on conductive silicone, can sustain its synaptic performance even under 360° bending. Furthermore, the device can sustain its synaptic behaviors even after exposure to fire for 60 s and 5.6 kGy of ionic irradiation. Additionally, APP is determined to be nontoxic, biodegradable, and transparent when compared with all the organics and inorganics used in previous memristors. The results of this study will inspire the development of more inorganic polymers for their utilization in future environmentally stable and flexible electronics.     

基于个性化线路定制的景区导游APP设计与实现

计算机和互联网技术日新月异,为旅游产业提供了新的发展思路。基于中国互联网信息中心发布的旅游数据进行分析,得出借助计算机和互联网技术实现个性化定制旅游将成为未来旅游市场的主流方式。文章从用户特点出发,以景区内游玩线路的定制为切入点,着重阐述线路定制对个性化旅游的重要性,最后设计并实现了一款基于线路定制的景区导游APP,该APP通过模块化设计思想,将系统分为定位模块、线路定制模块、线路查询模块、推荐模块等,引入最优路径、最短路径算法思路来满足游客的个性化需求。文章的思想对未来旅游产业的转型有着一定探索和指导作用。     

基于分布式触觉感知的智能脊柱矫形装置研究

脊柱侧弯在青少年中的发病率越来越高,严重影响青少年的心理和生理健康,如何矫正青少年不良姿态的问题迫切需要解决。为帮助脊柱侧弯的青少年得到更好的治疗,开展了基于分布式触觉传感技术的智能脊柱矫形装置研究。针对现有的支具治疗法在日常监督和提醒方面的不足,提出了将分布式触觉传感器用于矫形支具上,以提高其治疗效率。研究包括分布式触觉传感系统设计、支具设计和APP软件设计,采用模糊算法控制提醒强度,并对该算法进行实验验证。实验证明,该系统能在用户产生不良姿态时实时提醒,并能对用户的恢复情况进行检测,具有良好的实用价值;将分布式触觉传感技术应用在矫形支具上,可大大提高其智能化,为治疗青少年的脊柱侧弯问题提供帮助。     

基于3G和STM32的现代农业数据采集系统

介绍一种基于3G和STM3的现代农业数据采集系统,可以实现远距离对无人值守的农业现场进行监测,采集温度、湿度、光照强度等方面数据,通过 nRF24l0无线组网连接温湿度传感器 DHT11和光照传感器BH1750FVI,从而组成一个无线传感器网络,把各节点采集到的数据传到控制中心, RT-Thread嵌入式操作系统为软件平台,采用轻型TCP/IP协议栈LwIP对3G模块MC509进行PPP拨号连接internet,将数据上传到乐为物联网,就可以利用手机APP或计算机对农场的环境进行远程监控和管理。实验表明,系统工作稳定,提供了一种远程无线数据监控的解决方案,对提高农业管理效益具有积极的意义。     

基于云计算的水资源智能APP系统研究

以福建省水资源管理建设系统为例,基于云计算软件即服务(SaaS)的理念,提出水资源智能App构建模式。以水资源管理业务应用平台为基础,设计水资源智能App系统的总体结构;提出基于UML静态建模和动态建模相结合的App系统功能设计模型;基于ExMobi移动应用中间件,研发嵌入iOS和Android运行环境的App应用平台,融合业务功能模型,构建基于云计算的水资源智能App系统,实现监测、综合、预警、应急信息管理,以及代办提醒、新闻与公告等业务功能,为水资源管理提供实时高效的移动信息平台。     

2-(4-芳氧苯氧基)丙酸衍生物的合成及除草活性

以(R)-2-(4-羟基苯氧基)丙酸为原料,经醚化、酰氯化、酰胺化或酯化等步骤合成了22个2-(4-芳氧苯氧基)丙酸酯或2-(4-芳氧苯氧基)丙酰胺化合物(Ⅳa~v),其结构经1HNMR、13CNMR、MS及EA表征。除草活性测试结果表明:在75 g/hm~2浓度下,大部分化合物对单子叶杂草具有选择性的除草活性,其中化合物Ⅳa、Ⅳc、Ⅳf、Ⅳg和Ⅳi对单子叶杂草(马唐、稗草、狗尾草)土壤处理和茎叶处理均具有100%的防除效果。     

Study of Crystal Defects and Spectroscopy Characteristics of Ammonium Polyphosphate

Two kinds of commercial ammonium polyphosphate(APP)and three kinds of APP which were prepared in the laboratory were studied by X-ray diffraction(XRD),Fourier transforms infrared spectroscopy(FTIR),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).In identification of the form Ⅱ crystal APP by XRD and FTIR,some discrepancies were discussed.It is pointed out that the absorbance of the FTIR spectra at 682 cm-1 can exist not only in the form Ⅰ APP,but also in the form Ⅱ APP with the cr...     

原位反应增容技术制备非卤阻燃聚丙烯的研究

以多聚磷酸铵（APP）和三聚氰胺（MEL）为主阻燃剂，采用原位反应增容技术制备了非卤阻燃聚丙烯，从阻燃性能的角度对该有机膨胀型阻燃体系进行了优化探讨，并对原位反应的引发体系进行了初步筛选。结果表明，BPO和DCP体系都能引发原位反应，而且当阻燃母粒中m(APP)/m(MEL)为5／1、每100g聚丙烯加入15g季戊四醇时，可制得氧指数达29％以上的非卤阻燃聚丙烯。     

Study on poly(propylene)/ammonium polyphosphate composites modified by ethylene‐1‐octene copolymer grafted with glycidyl methacrylate

The compatibilization effect of ethylene‐1‐octene copolymer grafted with glycidyl methacrylate (POE‐g‐GMA) as an interface compatibilizer on the mechanical and combustion properties, and the morphology and structures of the cross sections of ammonium polyphosphate (APP)–filled poly(propylene) (PP) were investigated by thermogravimetry, dynamic mechanical analysis, and differential scanning calorimetry. The results indicated that the toughness of the PP/APP composites increased rapidly with adding POE‐g‐GMA; the dynamic mechanical spectra revealed that the increase of the toughness was closely related to the peaks of loss modulus (E″) and mechanical loss (tan δ). The improvement of the dispersion of APP in the PP matrix was attributed to the addition of POE‐g‐GMA; it was found that the interfacial adhesion between the filler and matrix was enhanced when the grafting material was added to the composites. Under such circumstances, the ratio of char formation was increased when the PP composites were heated, although the content of flame retardant was not changed, so the flame retardance of the material was improved. The addition of POE‐g‐GMA increased the rate of crystallization. At the same time, the degree of crystallinity and the temperature at the beginning of crystallization were decreased, although exerting little influence on the melt behavior of the crystallization of the composites. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 412–419, 2004     

聚磷酸铵-淀粉对木粉／聚苯乙烯复合材料的阻燃作用

利用锥形量热仪分析了聚磷酸铵(APP)-淀粉阻燃体系在木粉/聚苯乙烯复合材料(WF-PS)中的阻燃作用。结果表明,添加APP能有效降低WF-PS的热释放速率(HRR)和总热释放量(THR),增加成炭量,延长点燃时间(TTI),表现出显著的阻燃作用;APP对WF-PS的有效燃烧热影响不大,说明APP的阻燃作用为凝聚相机理,成炭是该机理的重要方面;添加淀粉作为APP的辅助成炭剂,能够提高阻燃效率并减少APP用量,APP-淀粉是WF-PS复合材料的有效膨胀型阻燃体系。APP-淀粉的添加对WF-PS的力学性质有一定不利影响,但是当APP用量在10%以下、淀粉用量2%以下时,WF-PS可保持良好的力学性能。