湿地园林一生态、湿地、地域文脉与园林美的统一——滕州荆泉风景区湿地园林景观规划设计

湿地作为地球上一种重要独特的、多功能的生态系统,对其合理开发利用成为当今环境保护的热点。营建湿地园林景观为湿地的可持续利用提供了良好的利用途径。荆泉风景区的建立对于改善饮用水源,提升城市品位,有着至关重要的作用。荆泉湿地园林的规划设计以尊重自然、生态优先,园林景观形神兼备,文化文脉、传承历史为设计理念;遵循生态、湿地、地域文脉与园林美的统一的原则;在可持续发展的生态观的前提下;融糅滕州悠久灿烂的城市历史、博大深厚的文化积淀以及园林艺术的造园手法、美学法则;规划设计出一个风景绮丽、钟灵毓秀、天人合一的和谐荆泉湿地风景区。     

压力式温度指示控制器现场校准探讨

简述了绕组温升工作原理以及现场校准压力式温度指示控制器的方法。     

X射线成像光斑检测装置研制

设计了一种低成本,快速响应的X射线光斑检测装置,可用于解决系统结构偏差所引起的透视探测器接收位置处的光斑偏离。该装置通过检测关键点处的X光斑强度及分布情况以判断实际X光斑位置与理论设计的偏差,以此为依据进行多次调整可使系统光斑调节到一合理位置。     

基于多种交易方式的省间省内现货市场双层出清模型

新能源比例不断提升,省间消纳需求不断增加,构建满足全局资源优化运行的省间市场是促进市场效率提升的关键。文中基于多种块交易及小时交易的时间耦合关系,建立了省间省内两级现货市场出清模型。首先,构建了包含普通小时交易、灵活小时交易、常规块交易、可移动式块交易和扩展链接式块交易多种交易方式的混合整数线性规划模型。其次,为解决省间市场主体较多、块交易时间耦合复杂带来的出清难度大的问题,提出了基于省内出清结果的参与省间市场主体的筛选机制,进一步实现基于各省筛选出主体的省间市场出清,通过融合省间、省内出清结果形成最终中标结果。最后,通过多区域互联的IEEE RTS-96系统算例验证该模型的合理性及其作用效果。结果表明,相较于各省单独出清,省间省内两级市场出清提升了整体社会福利。所提方法在提高求解效率的同时,尽量逼近省间整体出清的全局最优解,实现了社会福利最大化。     

基于凹点搜寻的重叠细胞图像自动分离的算法研究

提出了一种重叠细胞图像自动分离的新算法。根据重叠细胞的凹凸性,从细胞重叠区域的凹区域中寻找到凹点,根据凹点数与细胞个数的关系,判断是细胞串联还是细胞并联：如果是串联的情况,则直接将成对的凹点连成直线分离重叠区域;如果是并联的情况,则将凹点与重叠区域的中心连接成直线分离重叠区域。该算法在Matlab环境下对重叠细胞图像进行了自动分离,实验结果表明该算法实现简单,效果理想,且能基本保持原细胞的大小和形状。     

低碳钢板镀铅层在电阻点焊过程中的行为

本文研讨了镀铅钢板电阻点焊时,镀铅层的变化和它对接头性能的影响。试验结果表明,镀铅使焊接区的电流密度下降,析热量减少;焊后镀铅以片状或以“膜”的形式残留,在接头中这些均对接头的拉剪强度有影响。当采用大电流、短时间的强规范焊接时,能显著降低这种影响。     

A comparative study of fatigue estimation methods for single‐spot and multispot welds

Fatigue life and load data of spot‐welded samples were obtained by performing tensile‐shear fatigue tests on single‐spot‐welded samples, and by collecting published data on tensile‐shear fatigue tests of multispot‐welded samples. Finite element models of the spot‐welded samples were then constructed, and their accuracy was validated by comparing their results with those of static loading tests. Methods to estimate fatigue in spot‐welded joints proposed by Sheppard, Rupp, and Swellam were used to predict the fatigue life of each sample, and their results were compared. The sensitivity of each method to spot‐welding parameters, as well as the arrangement and number of welded spots, was analyzed to obtain their scope of applicability. Finally, the Sheppard and Rupp methods were used to obtain fitted fatigue curves of each spot‐welded sample, and the equivalent life method was used to generate P‐S‐N curves of the single‐spot‐ and multispot‐welded samples. This method can serve as a useful reference for fatigue reliability analyses of mechanical parts with spot‐welded joints.     

智慧景区共享电车的产品服务系统设计

目的 在人工智能技术的推动下,研究智慧景区共享电车产品服务系统的设计策略和具体实施方案.方法 将产品服务系统设计的方法运用到分析和设计的全过程中.通过分析用户需求与行为特征,建立目标用户角色模型,绘制用户体验地图梳理服务系统中的触点,分析局限性和识别机会点,制定智慧景区共享电车产品服务系统的设计策略.方案设计围绕设计信息架构、建立服务系统模型和绘制服务蓝图展开,进行共享电车产品服务系统的原型设计,并运用可用性测试对系统的用户体验进行评估.结论 可用性测试结果表明系统的用户体验良好,有助于进一步指导升级迭代设计.对智慧景区如何设计共享电车产品服务系统做出了有益指导,对其他服务场景下的共享电车设计也具有借鉴意义.     

Effects of nano-SiC particles on the FSSW welded AZ31 magnesium alloy joints

The microstructure of nano-SiC enhancing friction stir spot welding (FSSW) joint with dwell time of 3?s was characterised by an onion ring structure which consisted of alternate SiC-free zones and SiC-rich zones where SiC particles refined the grains. However, onion ring structure disappeared and SiC particles dispersed homogeneously when dwell time was 5?s. The microhardness of stir zone (SZ) and tensile shear load of SiC enhancing FSSW joint were higher than those of conventional FSSW joints. After heat treatment at 200°C for an hour, grains of the SZ grew substantially and coursed reduction in mechanical properties of joints, while grain size of SZ and tensile shear load of SiC enhancing joint was invariant but the microhardness of SZ increased.