基于自由度变动的定向公差计算方法分析

在分析物体结构特征的基础上,指出了定向几何公差中平行度和垂直度与几何要素自由度的关系;建立了定向误差相关要素的数学模型;分类给出了定向误差位置链中基准不变三环位置链的计算方法,为数字化加工过程中定向公差的设计和工艺计算提供了一种方法。     

长沙万博汇·名邸一期工程绿色施工技术

结合长沙万博汇·名邸一期工程实际,介绍了该工程采用的主要绿色施工技术和措施,包括绿色施工管理、环境保护、节材与材料资源利用、节水与水资源利用、节能与能源利用、节地与施工用地保护等6个方面。并指出绿色施工管理中要注意细节管理,全员参与和数据收集与分析的重要性。结果表明:通过绿色施工关键技术及管理措施的实施,有效降低了工程成本,保护了环境,取得良好的社会和经济效益。     

Preparation and upconversion luminescence of Y2SiO5:Yb3+, Ho3+ nanophosphors

X1 type monoclinic Y2SiO5:Yb3+, Ho3+ nanophosphors with fixed (varied) Ho3+ and varied (fixed) Yb3+ concentrations were synthesized by sol-gel method. The nanophosphors presented lacunaris shape with an average size of about 47 nm measured by transmission electron microscopy and scanning electron microscopy. Up-conversion emissions have been observed at 550 nm corresponding to (5F4, 5S2)-5I8 transition and 661 nm due to 5F5-5I8 transition of Ho3+ upon 980 nm excitation at room temperature. The results indicate that both green and red luminescences are based on the two-photon process through the energy transfer from Yb3+. However, the intensity of green emission is weaker than that of the red, because the 5I7 level of Ho3+ can be effectively populated. The integrated upconversion emission intensity on the Yb3+ and Ho3+ concentrations were also studied.     

传承办学传统,加强学生实践能力的培养

本文结合河北工业大学化工学院的实际,对如何提高学生的实践能力和创新能力进行了探索,提出了通过强化基础实验、改革实习和专业实验、加强青年教师实践能力的培养和加强本科毕业论文(设计)环节管理的建议,以期提高学生的实践能力和创新能力,培养高素质的创新人才。     

Immunomodulatory Activity of Recombinant Ricin Toxin Binding Subunit B (RTB)

Ricin toxin binding subunit B (RTB) is one of the subunits of the ricin protein. RTB has been used as adjuvant, but little is known about its mechanism. In this study, we found that RTB increased not only nitric oxide (NO) release, but also tumor necrosis factor (TNF)-α and interleukin (IL)-6 production in mouse macrophage cell line RAW264.7 cells. They subsequently exhibited enhanced ConA-induced T-cell and LPS-induced B-cell proliferative responses. We also examined the cytokines that were produced from splenocytes following in vitro RTB administration. Increased levels of IL-2, interferon (IFN)-γ and TNF-α were observed, while IL-4 and IL-5 were unaffected. These results demonstrate that recombinant RTB can act on the immune system and activate T-cells by introducing a Th1 immune response. Th1 cells might be the primary cellular target affected by RTB. Our results suggest that the recombinant RTB can promote the activation of macrophages and has a beneficial effect on immunomodulatory activity.     

采用KPCA和BP神经网络的单目车载红外图像深度估计

提出一种基于监督学习得到深度估计模型的单目车载红外图像深度估计方法。首先用核主成分分析法（KPCA）筛选红外图像特征。将最初提取的红外图像特征用核函数非线性映射到一个线性可分的高维特征空间,再完成主成分分析（PCA）,得到降维后的红外图像特征。然后以BP神经网络为模型基础,对红外图像特征和深度值进行训练,训练后的深度估计模型可对单目车载红外图像的深度分布进行估计。实验结果证明,利用该模型估计的单目车载红外图像的深度信息与原红外图像的深度信息一致。     

导电高聚物/纳米金属复合电极对水中硝酸盐类污染物的去除研究

文章综述了电化学催化去除硝酸盐类污染物的研究进展情况,对新型功能电极材料进行了性能比较和分析,并对反应机理、反应条件因素进行了阐述。在此基础上讨论了电化学催化技术用于去除硝酸盐类污染物的发展前景。     

大吨位平板玻璃生产线上的双通道分流传输取片法

在堆垛周期小于玻璃切割周期的情况下,将堆垛辊道分为左右两部分,并且分别由两台伺服电机驱动,实现左右单独控制。以较小的投入及改造即可及时恢复堆垛辊道的容纳能力,使得玻璃物流连续而无需等待或滞纳,提高了堆垛机的效率和安全性。     

304不锈钢在微生物介质中的腐蚀行为

利用间歇式方法培养海水中的细菌,用极化曲线和电化学阻抗谱研究304不锈钢在有菌和无菌培养基中的腐蚀行为.研究表明,前者的阳极极化电流密度大于后者,且随着培养时间的延长,电化学阻抗值在无菌培养基中先降低后升高,而在有菌培养基中一直降低.表明海水中的细菌对 304 不锈钢的腐蚀起到促进作用,诱导了不锈钢点蚀的发生.     

塑料专用低吸油量微细碳酸钙的研制

本文探讨了添加剂的类型、添加剂量、添加时间、反应温度、CO2浓度等对产品性能的要求,其结果对微细碳酸钙生产工艺的设计与改进具有指导意义。