宽带钢厚度模型的研究与优化

介绍莱钢宽带钢厚度模型的优化,以改善板形,提高控制精度.     

基于Irrlicht引擎的实时浅水效果模拟

本文在Irrlicht引擎的基础上结合GLSL语言,对浅水的水面波动、反射与折射特性及菲涅尔现象进行了实时模拟。将基于Gestner波的水面波动与基于纹理波的动态法线贴图相结合,真实地模拟了水面的波动与波纹效果。同时,采用渲染到纹理技术实时生成反射贴图,准确地模拟了水面的反射效果,解决了采用环境贴图渲染时的反射失真问题。在不考虑水深的情况下,本文将菲涅尔权值与材质的alpha通道相结合,去掉了实时渲染中折射贴图的生成,在满足实时浅水效果渲染的视觉需求条件下,减小了CPU与GPU的计算量。     

一种消除阶梯效应的图像分解新模型

针对TV-L1分解模型在进行图像分解时所得到的结构部分有阶梯效应的问题,本文提出一种改进的图像分解模型即GJTV-L1模型。该模型首先得到结构部分的切向量场,由切向量场可得到结构部分的法向量场,然后拟合法向量场得到重构图像,即结构部分。通过仿真实验,验证了GJTV-L1模型和算法的合理性及有效性。     

介观压阻效应电磁驱动微机械陀螺仪的设计与测试

将共振隧穿二极管具有的介观压阻效应与哥氏效应结合应用于陀螺的设计中,提出了一种新型的采用回折型正交梁的陀螺结构。结合现在的工艺水平,设计了合理的加工工艺方案,并进行了加工与封装。通过对封装后的陀螺进行驱动方向测试,得到了固有频率的范围;检测方向上利用振动台对陀螺灵敏度进行了测试,得到在1kHz和4kHz时的测试灵敏度分别为7.51mV/gn、100.74mV/gn。     

水声CDMA多用户通信系统仿真研究

针对水声环境通信系统码间干扰和相位偏移问题是水下多用户通信面临的主要问题,水下有限的发射功率使接收机对远距离用户信号的接收性能较低。提出了一种水声码分多址多用户通信系统,系统采用多输入多输出(M IMO)判决反馈均衡器补偿码间干扰、抑制多址干扰,同时利用扩频增益提高接收性能并进行仿真验证。计算机仿真结果表明,当扩频码长度为15、输入信噪比为16dB、远距离用户信号功率比近距离用户低14dB时,接收机能够对各用户信号无误码地接收,证明了系统的有效性。     

改进的遗传算法在污水管网中的应用

城市污水管网中各级泵站密切相关,泵站间由于链级制抑而协调性差,导致整个管网运行效率不高,甚至引起污水外溢。因此,本文提出了一种改进式遗传算法并应用于管网中各级泵站节点,从而使管网流入流出平衡,链级效应消失,整个污水排放系统处于最佳状态,同时降低了各级泵站能耗,提升了管网的运行效率。     

Kelvin Probe measurements of polymer coated gold substrates: Mechanism studies

The origin of work-function changes induced in polymer/metal structures (polyacrylic acid (PAA), ammonium and sodium polyacrylate) upon ammonia exposure is studied. To understand and explain the mechanism systematic measurements of uncoated and polymer coated metals are performed in Kelvin Probe (KP) setups. Additional data have been acquired through gravimetric and electrochemical experiments (cyclic voltammetry (CV)). The results obtained confirm that the field effect sensitive processes are taking place at the metal/polymer interface and allow their modelling. The intrinsic sensitivity of metallic samples upon ammonia exposure is influenced by the presence of coating polymers, by their ability to sorb water and to keep the metal surface wet or dry.     

Temperature compensation of fluorescence intensity-based fiber-optic oxygen sensors using modified Stern–Volmer model

In practical sensing applications, temperature effects are of particular concern, and hence it is necessary to develop the means to correct the fluorescence intensity measurement in accordance with the working temperature. Accordingly, this study develops a modified Stern–Volmer model to compensate for the temperature drift of oxygen concentration measurements obtained using fiber-optic sensors. The oxygen sensors considered in this study are based on teraethylorthosilane (TEOS)/n-octyltriethoxysilane (Octyl-triEOS) or n-propyltrimethoxysilane (n-propyl-TriMOS)/3,3,3-trifluoropropyltrimethoxysilane (TFP-TriMOS) composite xerogels doped with platinum meso-tetrakis(pentafluorophenyl)porphine (PtTFPP).

The experimental results are fitted to the modified Stern–Volmer model in order to compute suitable values for a temperature compensation coefficient at different working temperatures. It is found that the proposed temperature compensation method reduces the difference in the oxygen concentration measurement for working temperatures in the range of 25–70 °C as compared to data without compensation. The linearity and sensitivity of PtTFPP-doped n-propyl-TriMOS/TFP-TriMOS sensor are better than PtTFPP-doped TEOS/Octyl-triEOS sensor for working temperatures in the range of 25–70 °C.

The proposed approach could provide a straightforward and effective means of improving the accuracy of fiber-optic oxygen sensors if a variable attenuator is designed according to the temperature compensation coefficient. Thus, the fiber-optic oxygen sensor with a variable attenuator could work in a broad temperature range without using a temperature sensor.     

医学院校中计算机基础教学面临的问题及建议

论述了在医学院校中计算机文化基础教学中存在的一些问题,就如何提高教学效果、培养学生的能力,对大学计算机基础教学模式提出了一些切实可行的探索。从教学对象、教学方式等几个方面给出一些建议,力争提高计算机基础课程的教学质量和教学效果。     

压电发电器建模研究

压电发电器的优化设计必须以模型为基础。提出了一种新的压电发电器模型建立方法,运用该方法分别推导出2种结构的压电发电器的性能参数表达式,实验数据与表达式计算结果比较吻合,证明表达式可以用于压电发电器的性能预测。通过对输出参数表达式进行深入讨论,得出压电发电器的一般特性和相关参数与发电器性能参数之间的关系,可指导压电发电器的优化设计。