摘要：We developed a new one step approach to synthesize g-C3N4 nano-sheets by direct thermal pyrolysis process of urea in NH3 atmosphere. For the first time, the influence of the preparation gas atmosphere on the composition, crystalline and polymerization degree, and the activity of the g-C3N4 synthesized from thermal condensation of urea was investigated. Impressively, the g-C3N4 nano-sheets obtained under NH3 gas atmosphere exhibited much superi- or photo-catalytic activities to the prepared g-C3N4 in air or N2, and the rate of the g-C3N4-NH3 was about 5 times higher than that on g-C3N4-N2 sample. The detailed characterization analysis revealed that NH3 thermal pyrolysis atmosphere contributed to the polymerization degree and the formation of the layer with a more regular structure due to the efficiently extending of the conjugated π-conjugative system, which was favorable to the transfer of the photo-induced charge carriers. Furthermore, we studied in depth the structure-performance relationship in the sys- tem, and it was found that the synergistic effect of the larger surface area, the adjusted band energy structure and the well crystallization may be conductive to the higher separation of the electron-hole pair, thus leading to the won- derful performance for the g-C3N4-NH3. Notably, the method has the merits of low cost, scalable production and environmental friendliness.

摘要：文章旨在探讨如何将叙事空间理论与闽南地域特色相结合,以实现乡村景观的活化设计。通过对闽南地域的自然环境、文化传统、民俗风情等方面的分析,阐述叙事空间理论在乡村景观设计中的应用价值。研究提出了基于闽南地域特色的叙事空间构建方法和路径,从空间叙事主题的挖掘、叙事元素的提取与转化到叙事路径的规划,具体方案设计等,能为闽南乡村景观的保护、传承与创新发展提供理论依据和实践指导。

摘要：A successful mechanical property data-driven prediction model is the core of the optimal design of hot rolling process for hot-rolled strips. However, the original industrial data, usually unbalanced, are inevitably mixed with fluctuant and abnormal values. Models established on the basis of the data without data processing can cause misleading results, which cannot be used for the optimal design of hot rolling process. Thus, a method of industrial data processing of C-Mn steel was proposed based on the data analysis. The Bayesian neural network was employed to establish the reliable mechanical property prediction models for the optimal design of hot rolling process. By using the multi-objective optimization algorithm and considering the individual requirements of costumers and the constraints of the equipment, the optimal design of hot rolling process was successfully applied to the rolling process design for Q345B steel with 0.017% Nb and 0.046% Ti content removed. The optimal process design results were in good agreement with the industrial trials results, which verify the effectiveness of the optimal design of hot rolling process.

摘要：Model of elliptical trainer and 3D human body are built with the ergonomic module of CATIA V5 to study ergonomic characteristics of fitness equipments as a preliminary evaluation of elliptical trainer.

摘要：以设计出环境友好的产品为目标,将生态设计策略映射到AT&T环境影响评估矩阵的各项指标上,提出了一种产品生态设计方法.介绍了如何将此种方法应用于产品设计概念提出的过程中,并以手动式封杯机的设计为例,展示该方法应用在具体产品设计中的优点.该方法通过对环境影响评估矩阵的应用,使生态设计策略得到归类与细化,并能估算各条生态设计策略对不同产品的重要程度,从而更加有针对性地指导设计.

摘要：针对具有输入约束和变时滞的奇异摄动双线性系统,提出一种状态反馈无源控制器的设计方法,以消除时滞因素和输入饱和对闭环系统的影响.首先,在Lyapunov稳定性理论和无源性理论的框架下,应用线性矩阵不等式技术和凸组合技术,将系统状态反馈控制器的设计归结为求解一组与时滞上界无关的线性矩阵不等式问题.所得控制器使闭环系统渐近稳定且无源,同时构造了与奇异摄动参数相关的椭圆吸引域估计,并将上述方法推广到不含时滞和外部输入的系统.然后,提出凸优化问题,得到闭环系统吸引域的极大估计,其中奇异摄动参数稳定界也是设计的目标之一.最后,通过数值仿真算例说明了所提理论方法的有效性.

摘要：调制信号的抗多径和无模糊跟踪是现代全球导航卫星系统接收机码环设计中需要解决的两个重要问题。提出了一种基于优化算法的码鉴相器设计方法,该方法使用多相关器结构,以组合权值为优化变量,根据无模糊跟踪要求给出了约束条件。以多径包络面积为目标函数建立了非线性最优化问题,提出了一种基于曲线赋形技术的优化初值设置方法。仿真结果表明,与传统的鉴相器相比,所设计的鉴相器具有更好的抗多径性能,且能实现对二进制偏移载波调制信号的无模糊跟踪。

摘要：为使中国当代艺术设计摆脱“照搬”西方的枷锁,走出自己的特色道路。依据《墨子》,阐述了墨子兼爱思想与民本主义、“非乐”与“巧拙”、“三法”与“志功”、“节用”与“法仪”的设计理念。比较墨子设计思想与当代设计产品的异同。结墨子思想所蕴涵的设计哲学与当今社会所倡导的发展理念相似。墨子的思想,虽然被当时的统治阶级抛弃,但对我国当代原创设计有重要理论意义。

摘要：对转换桥研究进行了评述,提出了条件分隔基元概念和转换桥设计的分割基元方法,并将该方法应用于兰坡村“对立问题”的转换桥设计中,设计了兰坡村“猪-沼-粮”循环经济生态系统,研究表明,该系统的良性循环不仅可以达到“粮食安全和农民增收”的双赢,而且可以有效治理生猪规模养殖带来的二次污染．

摘要：为改善矿用挖掘机操作员的作业体验和操作界面设计不合理现状,提出了一种任务-结构-迭代融合的挖掘机操作界面设计方法.采用问卷调查、实地考察和文献资料分析等方法掌握操作员在作业中对环境和信息的感知接收情况,分析操作界面存在的问题,得出所需的设计点.采用结构分解法分析原操作界面的布局,建立了各模块与设计点之间的映射关系,分别确立控制台、控制面板、控制元件等主要模块的设计方法,并引入遮光设计和防误操作设计;采用人机工程学软件Jack迭代评价矿用挖掘机操作界面的可视性、可达性和舒适性.结果表明,应用任务-结构-迭代融合法设计的操作界面更加合理.