影响摄像机标定的摄像机模型研究

文章讨论了摄像机模型中各种参数因子对标定结果的影响,评价了采用仿真数据模拟方式对参数的精度影响.     

面向光伏发电的规则表预测模型

基于模式树提出了一种面向光伏发电的规则表模型.学习时,迭代地构建不同的模式树;对于每次迭代,树中对应于最优的路径被作为规则表中的规则.预测时,根据规则表,使用相应的线性回归模型进行预测.实验结果表明,较之于神经网络、模式树,该模型具有更好的可解释性,同时表现出更高的预测准确性.     

一类总量依赖型竹林发展系统的古典解

针对竹林发展系统边界不满足通常的三类条件的问题,采用在"竹龄-直径"存在区域内引进一类特殊的曲线族的方法,以避开边界条件问题;通过对竹子直径尺度量纲的适当选择,提出了一类总量依赖型二维竹林发展系统模型,并综合作特征线、先验估计、构造初始状态积分方程、迭代等手段证明了该系统整体古典解的存在唯一性。     

一类执行器饱和非线性Hamilton网络控制系统H_∞控制器设计

研究了一类执行器饱和非线性Hamilton网络控制系统H∞状态反馈控制器设计问题。该类网络控制系统中存在不确定的网络时延及丢包,待设计的控制器受到饱和因素的约束,且系统的外部扰动范数有界但统计特性未知。结合Hamilton系统结构特性,当网络时延和连续丢包有界时,将网络时延和连续丢包转化为时变时滞,应用Lyapunov-Krasovskii稳定性理论来分析和设计H∞控制器,使其满足H∞性能指标,控制器中的未知参数通过求解不等式来确定。算例分析与仿真验证了方法的有效性。     

优选多地震属性线性回归方法在预测煤层厚度中的应用

采用相关性回归分析和聚类分析优选出三种地震属性：瞬时频率算术平均值、总振幅、总能量。应用线性回归方法建立了瞬时频率算术平均值、总振幅、总能量和煤层厚度之间的回归模型。通过对三元三次回归模型与三元一次、三元二次回归模型预测结果的对比分析,选用三元三次回归模型预测了山西宁武某煤矿的煤层厚度。     

G.718音频编码器核心层的一种低延时编码方案

语音编码器不仅要求提供高质量的语音,同时还要具有较低的编解码延时。较大的编码延时不仅会降低语音通信的服务质量,同时还可能减小系统容量。由于G.718编码器的延时主要由核心层算法引入,为了降低G.718编码器核心层的延时,提出了一种帧长为5ms的低延时编码方案,通过改变语音分类、开环基因搜索、线性预测系数的求解和量化方法,成功将编码延时在G.718基础上降低了25ms。主客观语音评测结果表明,该方案接近G.718核心层的重建语音质量。     

嵌入式Web服务器软件的设计与实现

针对嵌入式远程监控系统中服务器资源有限的问题,提出了应用CGI和XML技术实现远程监控计算机与嵌入式Web服务器进行动态交互的具体方法.结合嵌入式远程监控系统的基本需求,提出了组件化设计的思想,并定义了嵌入式远程监控系统的主要组件.根据系统功能的要求,着重对软件设计进行了分析与实现.实践证明,该方案以极小的代价即可实现设备的远程控制,且简单、安全,这一研究对后续复杂远程控制的研究提供了一定的参考价值.     

Charakterisierung und Störstoffanalyse von rückgewonnenen Stoffströmen aus Wärmedämmverbundsystemen

Due to the growing energy requirements, the proportion of external thermal insulation composite systems (ETICS) installed has increased significantly during the past 50 years. Due to the longevity of these systems, ETICS waste is currently accumulating. Owing to the complex construction as well as a multitude of differently installed materials and substances of the past generations, there are many uncertainties and problems with the clean and low-pollutant processing of such systems. In the frame of this work, the ETICS were processed and sorted before being screened for ingredients or pollutants as well as for the purity of the recovered material fractions.     

Near infrared light-induced disassembly of polymeric micelles based on methylene blue conjugated polyethylene glycol

Light-sensitive drug delivery systems are considered ideal for applications in the biomedical fields for their ability to release the payload in an on-demand spatiotemporal controlled manner through the manipulation of the light source. Among the broad radiation spectrum, near infrared (NIR) light is considered advantageous compared to UV and visible light, due to its inherently lower photodamage to normal tissues and deeper penetration to lesion areas. In this study, we report a successful synthesis of a polymer capable of undergoing partial degradation upon irradiation with NIR light by conjugating 10-N-carbamoyl linkage methylene blue (MB) moiety, a NIR photocleavable ligand, with polyethylene glycol (PEG). Through effective coupling of MB, a hydrophobic moiety, to the hydrophilic PEG molecule, an amphiphilic polymer was synthesized, as demonstrated by a lowered surface tension (55 mN/m at 0.1% wt/vol). Subsequently, photo-induced reversal of surface activity associated with self-assembled structure disruption, was displayed by surface tension measurements, size distribution analysis, and burst release profile of paclitaxel (PTX) from polymeric micelles upon the exposure to NIR irradiation.     

Iodine-loaded poly(silicic acid) gellan nanocomposite mucoadhesive film for antibacterial application

Iodine-loaded poly(silicic acid) gellan nanocomposite film was fabricated and evaluated for antibacterial properties. Poly(silicic acid) nanoparticles were synthesized by condensation of silicic acid under alkaline conditions in the presence of polyvinyl pyrrolidone, phosphate ions, and molecular iodine. The nanoparticles were incorporated into gellan dispersion to prepare gellan nanocomposite film using the solvent casting method. The nanocomposite films were characterized by Fourier transformed infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction studies. The results of characterization studies indicated improved thermal stability and an increase in the degree of crystallinity. The scanning electron micrographs and energy dispersive X-ray spectrum confirmed the uniform dispersion of silica and iodine in the nanocomposite films. The analysis of physical and mechanical properties revealed the enhanced tensile strength, moisture resistance, and higher folding endurance of poly(silicic acid) gellan nanocomposite films as compared to gellan film. Further, the iodine-loaded poly(silicic acid) gellan nanocomposite films showed good antibacterial activity against Staphylococcus aureus and Escherichia coli and effective mucoadhesive strength. The results indicate that iodine-loaded poly(silicic acid) gellan nanocomposite mucoadhesive film can be used for potential antibacterial applications in pharmaceuticals.