摘要：In this paper, we present an algorithm for reconstruction of B-spline surface such that it interpolates the four given bound- ary curves and simultaneously approximates some given inner points. The main idea of our method is： first, we construct an initial surface which interpolates the four given boundary curves; then, while keeping the boundary control points of the initial surface un- changed, we reposition the inner control points of the surface with energy optimization method. Examples show that our algorithm is practicable and effective.

摘要：用密度泛函方法研究了一种均苯四甲酰亚胺桥联的聚酞菁亚铁的氧还原反应.设计了三个模型分子以研究此催化剂在不同聚合度时的氧还原催化反应性能.使用BP86泛函和SVP基组进行构型优化得到模型分子及其氧气复合物的电子和分子结构.此催化剂中心的铁原子和氧气以双键结合并发生电荷转移时,氧气被还原.这证明此催化剂具有良好的催化氧还原能力.通过前沿轨道分析以及模型分子氧气复合物稳定性分析证实,具有较高聚合度和较强吸电子取代基的催化剂具有更好的氧还原活性.催化剂的催化性能通过一个电催化循环来实现.在此循环过程中,氧气结合氢离子被还原为水,因此此催化剂需要在酸性介质中使用.

摘要：研究了芳香席夫碱的设计合成、界面相行为以及与铜离子的配位过程,并与离位合成的铜复合物的界面组装行为进行了对比.利用表面压-面积等温线、紫外光谱、红外光谱、原子力显微镜等一系列实验方法来详细表征组装膜.结果表明,席夫碱配体与铜复合物均可在气液界面上形成稳定的有序组装膜,并可以转移到固体基片上构筑多层膜.进而,席夫碱配体在纯水界面上表现出奇特的相变.在相变点前后,二维的平膜变化成了三维的纤维状组装结构.然而,对于铜离子亚相上的组装过程却没有出现较大的变化.两者之间明显的差异可归因于在气液界面超分子组装过程中的分子构型以及疏水性能的不同引起的.目前的工作为制备和调控有序组装膜提供了有益探索.

摘要：分别建立了真空镀膜机行星系统中平面光学元件薄膜厚度模型和修正挡板校正薄膜厚度非均匀性模型,并运用数值计算方法完成修正挡板优化设计;研究了使用修正挡板校正薄膜厚度分布时平面行星夹具上热蒸发薄膜材料的沉积效率。实验结果表明:依据修正挡板校正薄膜厚度非均匀性模型优化设计的修正挡板能使口径为310mm、无倾斜放置的平面行星夹具上,由电子束热蒸发工艺制备的MgF2薄膜厚度均匀性优于99.6%,并且热蒸发MgF2薄膜材料的沉积效率高于87.4%。

摘要：In this paper, we propose anovel geometricaldetail editing method for triangulatedmeshmodels based on filtering robust differential edge *** editing consists ofnot only feature-preserving denoising for removing scanner noises, but also interactive detail editing for weakening or enhancing some specific geometric *** detail editing results are obtainedby reconstructingthe mesh fromnew processed differential edge coordinates, which are filtered from the view of signal processing, in linear least square *** results and comparisonswith other methodsdemonstrate that our method is effective and robust.

摘要：To improve the vibration-isolation performance of cab seats,the optimization model of the seat suspension system of construction machinery cabs is proposed based on the negative stiffness *** negative stiffness nonlinear kinetic equation is established by designing the seat negative stiffness suspension structure(NSS).Using MATLAB,the different parameters of the suspension system and their influences on the dynamic stiffness are *** ideal configuration parameter range of the suspension system is ***,the optimization model of NSS is proposed,and the vibration transmissibility characteristics are simulated and analyzed by different *** results show that the displacement and acceleration amplitudes of the optimized seat suspension system are evidently reduced,and the four-time power vibration dose value and root mean square calculation values in the vertical vibration direction of the seat decrease by 86%and 87%,*** effective amplitude transmissibility(SEAT)and the vibration transmissibility ratio values also ***,the peak frequencies of the vibration transmitted to the driver deviate from the key frequency values,which easily cause human ***,the design of the seat suspension system has no effect on the health condition of the driver after being *** findings also illustrate that the NSS suspension system has good vibration-isolation performance,and the driver's ride comfort is improved.

摘要：Since the gas infrared absorption spectrum source intensity of several in a thousand, it is even less linewidth is only several nanometers occupying the than the noise of light source. The signal of gas absorption is submerged in the noise, so it is impossible to measure the concentration of gas with spectrum absorption directly. According to the principle and parameters of difference absorption system of CH4 gas, a detection circuit consisted of the lock-in amplifier is designed. The experiment results indicated that the detection circuit can satisfy the demand of the whole system, and the limit concentration is 150×10^-6.

摘要：为探究再生沥青混合料(RAP)拌和过程中的均匀性特征变化规律,考虑拌和时间和RAP料老化程度因素,选择二氧化钛粉末作为RAP料示踪剂,在实验室内制备掺有质量分数40%RAP料的再生沥青混合料,并建立均匀性指标评价再生沥青混合料均匀性特征.通过计算机断层扫描技术(CT)获取沥青混合料数字图像,并对图像进行基于Mimics软件的组分识别,最终建立关于组分和结团的均匀性评价体系.结果表明:粗集料分布情况对混合料拌和均匀性的影响最大,其次是沥青和孔隙分布情况;延长搅拌时间有利于提高再生沥青混合料的拌和均匀性,然而拌和过程中形成的新结团又会阻碍拌和均匀性的改善.考虑组分和结团的均匀性评价体系可以有效揭示再生沥青混合料拌和均匀性特征变化规律,为建设高质量再生沥青路面提供参考.

摘要：本文在Banach空间中设计了一些新的杂交迭代算法用以逼近一类均衡问题解集和弱相对非扩展映射不动点集或极大单调算子零点集的公共元.得到了一些强收敛的结论,并将它们推广到逼近一类均衡问题解集和有限个弱相对非扩展映射公共不动点集或有限个极大单调算子公共零点集的公共元的情形.最后,展示了本文的迭代算法在最优化问题上的应用.

摘要：为了解决光纤光栅作为应变传感器使用时的温度应变交叉敏感问题,提出了一种全新的光纤光栅温度补偿方法,该方法最大特点是利用一个光纤光栅同时实现了温度自动补偿与应变测量。该方法基于材料的热应力原理,简称为基于材料热应力的光纤光栅温度补偿方法。通过理论分析表明:温度灵敏度系数与应变灵敏度必须精确测定,否则会影响结构设计;应变元件与温度补偿元件的面积之比对温度补偿效果很大,原则上应小于0.5,因此结构半径的加工误差对温度补偿影响很大。应变元件与温度补偿元件的长度比对温度补偿效果基本可忽略,因此,原则上在不影响温度补偿效果的前提下,尽量提高温度补偿元件与应变元件的长度比。