基于μC/OS-II生物脱氮工艺中多参数实时检测

为实现对生物脱氮工艺中多参数的实时检测,以及解决常规化学检测过程中带来的污染和耗时问题。应用了一种基于电化学和嵌入式系统,可同时对水温、pH值、氨氮3个相关参数进行实时检测,并对理论值和实测值进行数据分析对比。实验结果表明,该系统实时性良好、稳定可靠,且满足了该工艺实时检测要求。     

结合关键点与引导向量的旋转目标检测网络

目的 目标检测是遥感智能解译中重要的研究方向之一,大多数目标检测算法难以实现密集排列的旋转目标的高精度检测。提出了一种基于关键点与引导向量预测的目标检测算法,实现高精度旋转目标检测的同时,还可对目标的朝向进行表征。方法 首先提出了一种新的旋转目标建模方式,将目标检测分解成中心点、头部顶点、引导向量以及目标宽度的参数回归以更贴合检测目标;其次设计旋转椭圆高斯核,能够更好地拟合遥感目标的形状,从而提升关键点的预测精度;最后通过预测中心点指向头部顶点的引导向量,完成同一个目标内中心点与头部顶点的匹配,从而生成一个精准的带方向的旋转矩形检测框。结果 在大长宽比舰船目标的HRSC(high-resolution ship collections)数据集上的实验结果表明,相比于其他主流的目标检测算法,本文算法获得了更好的检测结果,在VOC 2007(visual object classes)和VOC 2012的平均精度分别达到了90.78%和97.85%。在小长宽比飞机目标UCAS-AOD(UCAS-high resolution aerial object detection dataset)数据集上达到了98.81%的平均精度。实验结果表明了本文算法的可行性与有效性。结论 本文算法利用椭圆高斯核计算中心点与头部顶点,并设计引导向量对点匹配关系进行约束,实现了旋转目标的方向检测。     

Lymphatic fatty acids from rats fed human milk and formula supplemented with fish oil

Absorption of long-chain polyunsaturated fatty acids from human milk and formula supplemented with fish oil was studied to determine if the distribution route into lymphatic triacylglycerol (TAG) and phospholipid (PL) varies with the dietary source. Rats were intraduodenally infused with human milk or formula containing graded amounts of fish oil (0, 0.5, or 1.0 g/100 mL), and the mesenteric lymph was collected. Arachidonic acid (20∶4n−6) levels in lymphatic TAG and PL were highest from animals fed human milk. In the animals infused with formula containing fish oil, as the amount of eicosapentaenoic acid (EPA, 20∶5n−3) infused increased, there was essentially an equal increase of EPA associated with both lymphatic TAG and PL. Animals intraduodenally infused with human milk or formula without fish oil had only minor levels (less than 1%) of EPA in the lymph. In the fish oil-treated animals, as the amount of docosahexaenoic acid (DHA, 22∶6n−3) infused increased, there was a 16-fold increase in DHA associated with lymphatic TAG, but only a 3-fold increase in DHA associated with lymphatic PL. The highest level of DHA in rats infused with human milk was observed in lymphatic PL. Hence, fish oil can be added to formula as a source of long-chain polyunsaturated fatty acids, but the distribution of fatty acids into lymphatic TAG and PL is not the same as that observed with human milk.     

催化剂对BOPP专用树脂微观结构的影响

通过对催化剂的筛选、试验,成功地用单环管反应器生产出双向拉伸聚丙烯(BOPP)专用树脂。BOPP专用树脂的熔体流动指数3.0 g/10 min,等规指数(96.0±0.5)％,屈服拉伸强度96 MPa,悬臂梁冲击强度34.J/m,断裂伸长率900％～910％,分子量分布在5.0左右;在拉伸速率为250～280 m/min时,用其拉伸的薄膜均匀,破膜次数平均3～4次/天。     

鄂西黑色瓦板岩矿床地质特征

本文介绍了鄂西黑色瓦板岩的分布状况、矿床特征,分析了黑色瓦板岩的找矿标志,指出了找矿方向。     

网络突发事件蔓延及其危险性评估

网络突发事件是一种新类型的公共安全危机形式.本文从网络突发事件的概念出发,分析了其生命周期过程,认为蔓延期是这一过程中的特殊阶段.进而提出网络突发事件蔓延危险性评估的必要性,总结了网络突发事件蔓延的影响因素及其危险性评估要素.     

A Close Look at the Urban Planning and Development in Asia——A Review on Asian Cities: Planning and Development

正Asian Cities:Planning and Development Editors:Wu Jiang, Zhang Fan, Sha Yongjie, Xia Liping Year:2018 Publisher:Tongji University Press ISBN:9787560875774 1. Publishing background The Asian Cities:Planning and Development edited by Prof. Wu     

甘氨酸的反相高效液相色谱分析方法的研究

建立了一种用高效液相色谱法测定甘氨酸的定量分析方法,采用美国SIELC primesep 100色谱柱（250 mm×4.6mm、5μm）,以乙腈/水（10/90）为流动相（用磷酸调节pH=2.0）,选择200nm为检测波长进行检测,表明方法的标准偏差为0.18,变异系数为0.23%,相关系数为0.9999,平均回收率100.13%。方法具有快速、简便、准确、重现性好等特点。     

三氟化硼的制备

详细介绍了三氟化硼的物性和生产工艺,并对其几种生产工艺和精制方法进行了讨论.     

野外大口径管道焊缝X射线检测机器人

利用管内移动载体拖动周向Ｘ射线探伤机，借助ＣＣＤ摄像系统确定焊缝并对正拍片，实现单壁成像，该机器人结构紧凑，工作效率高，稳定可靠，是野外管首宛损检测的理想设备。