银型离子聚合物金属复合材料传感性能

利用化学沉积的方法, 在反应温度为23℃和10℃的条件下, 制备银型离子聚合物金属复合材料(Ag-IPMC)。SEM和EDAX观测结果表明: 反应温度10℃下制备的试样与23℃的试样相比, 具有更好的电极沉积效果, 其内、 外电极厚度分别增加25%和34%, 且外电极的开裂和剥落现象得到抑制。对10℃条件下制备的三种不同厚度的试样(0.2 mm、 0.4 mm、 0.8 mm)的传感特性研究表明: 随着厚度的增加, 试样输出电压和灵敏度增 强趋势明显; 三种试样均对低频激励敏感, 在0.3~0.8 Hz时试样具有最高的灵敏度, 其中0.8 mm试样在0.65 Hz 时的传感电压为17.82 mV, 灵敏度可达1030.06 mV/mm。     

Intercalating Dye Harnessed Cationic Conjugated Polymer for Real‐Time Naked‐Eye Recognition of Double‐Stranded DNA in Serum

Thiazole orange (TO), an intercalating dye, is integrated into cationic poly(fluorene‐alt‐phenylene) (PFP) to develop a macromolecular multicolor probe (PFPTO) for double‐stranded DNA (dsDNA) detection. This polymer design not only takes advantage of the high affinity between TO and dsDNA to realize dsDNA recognition in biological media, but also brings into play the light‐harvesting feature of conjugated polymers to amplify the signal output of TO in situ. PFPTO differentiates dsDNA from single‐stranded DNA (ssDNA) more effectively upon excitation of the conjugated backbone relative to that upon direct excitation of TO as a result of efficient fluorescence resonance energy transfer from the polymer backbone to the intercalated TO. In the presence of dsDNA, energy transfer within PFPTO is more efficient as compared to that for free TO/PFP system, which leads to better dsDNA discriminability for PFPTO in contrast to that for TO/PFP. The distinguishable fluorescent color for PFPTO solutions in the presence of dsDNA allows naked‐eye detection of dsDNA with the assistance of a hand‐held UV lamp. The significant advantage of this macromolecular fluorescent probe is that naked‐eye detection of label‐free dsDNA can be performed in biological media in real‐time.     

UWB无线通信技术分析

超宽带(UWB)无线通信通过直接发送脉冲无线电信号传送数据.其调制方式包括:脉冲幅度调制、通断键控调制、跳时脉位调制及跳时/直扩二进制移频键控调制.该技术收发机采用软件无线电的全数字硬件接收结构,直接通过脉冲调制发送信号而无传统的中频处理单元.     

基于纹理方向预测的空域差错隐藏方案

在差错信道中传输视频压缩码流时,容易发生视频数据的损坏或丢失,这样不仅会对当前的视频帧产生影响,而且差错会蔓延到后续视频帧。I帧出错时的影响尤为严重。针对这一问题,本文在对H.264标准进行研究的基础上,对一种空域差错隐藏算法——纹理方向法进行了改进,结果表明,这种方法达到了较好的隐藏效果,改善了图像的主观质量。     

宽带可调谐取样光栅DBR激光器

利用离子注入量子阱混杂技术,成功研制了三段取样光栅(SG)-DBR激光器.器件不连续调谐范围超过30nm,边模抑制比大于30dB.     

高速电路中电容的分析及其EMC设计

在高速数字电路设计中,电容的正确选用及配置对系统的正常工作及其电磁兼容性起着至关重要的作用.本文对电容在电路系统中的高频特性进行了详细的分析,进而对电容的选择、放置及容值的计算进行了研究,提出了具有一定工程意义的去耦电容的选取方案.     

高压电气设备绝缘状态管理与评估系统

为了对高压电气设备绝缘状态信息进行快速、高效的管理，开发了一种基于浏览器/服务器 3层网络结构的高压电气设备绝缘状态管理与评估系统。该系统利用计算机数据库管理高压电气设备绝缘状态，实现对试验数据的实时查看和分析;通过绝缘状态专家评估，能根据数据库中的信息给出高压电气设备的合格性判断、曲线拟合和趋势分析、变压器油的色谱分析。同时，系统充分利用电业局内部网络资源，实现了设备绝缘状态信息经电脑网络逐级审批和统一上报的功能。系统的运用有利于电业局相关人员进行信息汇总和统计分析，以便对设备管理做出准确的决策。     

Characteristics of municipal solid wastes incineration (MSWI) fly ash–cement matrices and effect of mineral admixtures on composite system

An experimental work was carried out to investigate the feasibility of application of MSWI fly ash as an auxiliary cementitious material. The water demand for normal consistency, setting time, volume stability, flexural and compressive strength of MSWI fly ash–cement compound matrices were tested. And, the composite effect and the influence of mechanical properties and heavy metals solidification are studied by mixing MSWI fly ash–cement matrices with common mineral admixtures. The results show that the MSWI fly ash has some cementitious activity, but the reactivity is relatively lower and its addition to cement may lead to retardation of cement hydration. After incorporation of common mineral admixtures, the strength of solidified body was enhanced, and the effect of the heavy metals-immobilizing may be reinforced.     

Size reduction technique for shorted patches

A technique is proposed for further reducing the size of a shorted patch antenna. The method uses strategically positioned notches near the shorting pin and feed. A shorted patch utilising this technique is ~75% smaller than a conventional microstrip patch antenna     

基于OMAP5912处理器的触摸屏驱动研究

介绍了基于OMAP5912芯片触摸屏的硬件设计和软件开发,其中包括ADS7843控制器工作原理.