公众素质、外部环境对公众再生水接受态度的影响

公众对再生水的接受态度是再生水推广的关键。构建公众素质、主观规范、信息公开、政策环境、再生水接受态度与再生水接受意愿的关系假设模型,并以356份来自西安市居民问卷作为调研对象,运用结构方程模型进行实证分析。结果表明,接受态度正向影响接受意愿,其中主观规范是影响再生水接受态度的主要因素,信息公开与公众素质是次要因素,政策环境对再生水接受态度的影响不显著。     

新田岭白钨矿选矿废水处理及回用试验研究

针对新田岭白钨矿选矿废水中可溶性SiO₂浓度和pH值较高的情况, 采用常规混凝沉降方法, 考察了混凝剂种类、混凝反应时间、废水pH值及混凝剂用量等因素对混凝反应的影响, 优化了废水混凝处理工艺。混凝处理水回用于浮选试验表明, 处理水完全可以回用于白钨矿浮选。     

Precipitation location of secondary phase and microstructural evolution during static recrystallization of as-cast Ti-25V-15Cr-0.3Si titanium alloy

The microstructural evolution and precipitation location of the secondary phase of an as-cast Ti-25V-15Cr-0.3Si titanium alloy were investigated via isothermal compression experiments and heat treatment. The average aspect (length-to-width) ratio, average area and size of the grains at different heat treatment temperatures and holding time were analyzed and the effects of deformation and annealing time on the grain area and size were considered. It was found that the grain size was strongly influenced by the height reduction and holding time. Grain growth was significant when annealing time increased from 10 min to 2 h at 950 °C and height reduction of 30%; however, grain growth was minimal at annealing time between 2 and 4 h. Many dispersion particles were observed to form in continuous chains; the precipitation location was confirmed to be along initial grain boundaries, and the dispersion particles were identified to be Ti₅Si₃ phase by TEM.     

Research on virtual dynamic optimization design for NC machine tools

Virtual dynamic optimization design can avoid the repeated process from design to trial-manufacture and test. The designer can analyze and optimize the product structures in virtual visualization environment. The design cycle is shortened and the cost is reduced. The paper analyzed the peculiarity of virtual optimization design, and put forwards the thought and flow to implement virtual optimization design. The example to optimize the internal grinder was studied via establishing precise finite element model, modifying the layout of Stiffened Plates and designing parameters of the worktable, and using the technology of modal frequency revision and the technology of multiple tuned damper. The result of optimization design compared the new grinder with the original grinder shows that the entire machine＇s first orders natural frequency is enhanced by 17%, and the response displacement of the grinding-head has dropped by 28% under the first order natural frequency and by 41% under second order natural frequency. Finally, the dynamic performance of the internal grinder was optimized.     

人工智能在设备故障检测中的应用

简要分析了常用故障检测方法的特点,提出基于PLC控制系统的二级模式人工智能故障检测方法,介绍了这种方法在清酒传输控制系统中的应用。     

带式输送机输送带纵向撕裂保护装置的研究

分析了带式输送机纵向撕裂机理,提出一种新的防止输送带纵向撕裂的方法,并给出相应实用装置设计方案。通过改造输送机机尾托架及托辊结构,由压力传感器拾取撕带时托架所受的附加纵向压力,以所测值与初始设定值比较结果作为撕带与否的判据。     

继承与创新的有机融合--河北建筑科技学院第六教学楼创作回顾

在教学楼的创作中，创新的开敞式边庭空间形式和以庄重、典雅的大尺度弧形门为主题的简洁造型使校园环境的场所精神得到继承，并有所创新，确定了自身在场所中的新主角地位，体现出继承与创新的有机融合。     

新形势下地勘单位的标准化工作探讨

在现代企业制度下，地勘单位如何认识企业标准化工作，是一个值得探讨的问题。阐述了标准化工作在现化企业发展中的重要作用，从标准化管理体系的优点、技术标准在增强企业核心竞争力方面的作用，及现代企业制度下的地勘单位必须重视技术创新与管理创新等方面进行有益的探讨。     

S315省道K92边坡变形破坏机理分析

降雨引起地下水渗流场变化是影响边坡稳定性的重要因素,特别是渗透系数较低的残坡积土边坡,受降雨影响更为显著。315省道K92边坡岩土的力学强度较高,但由于开挖边坡后缘的自然斜坡有广阔的降雨入渗补给区,表层坡积土渗透性好,而前缘开挖边坡残坡积土渗透性差,造成雨季地下水位在坡面出露,从而诱发滑坡灾害。通过计算地下水位变化对边坡稳定性的影响,表明随着边坡后缘地下水位的抬升,边坡稳定系数逐渐减小,可见地下水位的上升引起渗透力增加是导致边坡失稳破坏的主要原因。因此,对于低渗透性土质边坡,应特别注意地下水渗流场变化对边坡稳定性的影响。