短纤维/弹性体复合材料的研究 Ⅲ涤纶短纤维与再生胶/聚乙烯复合材料研究

本工作探索了再生胶/高密度聚乙烯硫化共混体(RTPV)与涤纶短纤维(SF)复合材料(SFRTPV)的制备与性能,讨论了制取该复合材料的密炼法动态硫化工艺(D)和开炼法静态硫化工艺(S),SF与RTPV的增粘体系和效果,SF组份作用及SF—RTPV的挤出加工性能。     

新时代背景下数据科学与大数据专业人才培养的若干思考

聚焦新时代复合型数据科学与大数据专业人才的培养,提出要围绕育人目标制定人才培养方案,并不断优化;要坚持"引进来,走出去"原则建设师资队伍;要坚持高标准、宽视野的要求进行课程建设;要调用校内外一切资源建设实验室.文章提出要从系统论、控制理论的视角构建数据科学与大数据专业人才培养协同系统.     

基于图卷积神经网络的药物靶标作用关系预测方法

药物-靶标作用关系预测在药物研发以及药物重定位中扮演着重要角色,但现有的机器学习方法在正负样本高度不平衡的数据上仍存在预测能力不足的问题.为此,提出一种基于图卷积神经网络的药物靶标作用关系预测方法.该方法首先构造一个结合多种药物(靶标)相关信息的异质信息网络,然后采用图卷积神经网络在此异质信息网络上学习得到能精确表达每个节点拓扑特征及邻居特征信息的低维向量表征,最后利用这些向量信息通过向量空间投影预测节点间概率的评分.在DrugBank_FDA和Yammanishi_08数据集上进行的药物-靶标作用关系预测的对比实验中,所提方法的AUPR(Area Under the Precision-Recall Curve)值都优于其他4种方法,并且在较大型数据集上也有较好的表现.实验结果表明,所提方法提高了样本高度不平衡时的药物-靶标作用关系预测性能;同时在生物药物数据库上的实验也验证了所提方法所发现的未知药物-靶标作用关系的有效性.     

Editorial

Intelligent Service Robotics -     

掺硼金刚石薄膜电极电化学氧化对铜绿微囊藻的生长抑制

阳极材料采用掺硼金刚石薄膜板状电极,研究了电化学氧化中电流密度、电解时间、pH、氯离子浓度、硫酸根离子浓度对铜绿微囊藻生长抑制的影响,以及电解前后藻细胞形态的变化。结果表明,4个影响因素对铜绿微囊藻生长抑制效果显著。抑藻效果随电流密度、电解时间的增加而增加,电流密度为17 mA/cm²时藻细胞出现破裂、细胞内物质流出的现象,抑藻效果较好;当电解时间为20 min时,可完全抑制藻细胞生长;再增大电解时间,对抑藻效果无明显促进作用,初始pH在中性及酸性条件下可完全抑制藻细胞生长。抑藻效果与溶液中氯离子、硫酸根离子浓度成正相关,当溶液中氯离子浓度为6 mg/L时,可完全抑制藻细胞生长;无氯离子时,藻细胞在4 d后出现继续增长现象。     

Fractional Order ［Proportional Integral］ Controllers Parameters Algorithm Based on the Vector Method

In forensic investigations,it is vital that the authenticity of digital evidence should be ensured. In addition,technical means should be provided to ensure that digital evidence collected cannot be misused for the purpose of perjury. In this paper,we present a method to ensure both authenticity and non-misuse of data extracted from wireless mobile devices. In the method,the device ID and a timestamp become a part of the original data and the Hash function is used to bind the data together. Encryption is applied to the data,which includes the digital evidence,the device ID and the timestamp. Both symmetric and asymmetric encryption systems are employed in the proposed method where a random session key is used to encrypt the data while the public key of the forensic server is used to encrypt the session key to ensure security and efficiency. With the several security mechanisms that we show are supported or can be implemented in wireless mobile devices such as the Android,we can ensure the authenticity and non-misuse of data evidence in digital forensics.     

油罐水高智能测量装置研究

原油在开采和加工过程中必须除去原油中的水分,以减少在输送和储存过程中的浪费,确保输送、加工过程中的安全。因此,油罐底部水在线监测对原油生产和管理具有重要意义。油罐水高智能测量装置通过石油密度计、浮球式液位仪、压力传感器的在线测得参数,利用这3个参数关系,通过PLC编程计算实现对油罐中油水混合状态下底部水高的在线实时自动监测。这对于在石油脱水和存储过程中及时排放罐底水提供技术支持。     

教材评估视域下的大学英语课堂教学实证研究

《教育部实施卓越工程师教育培养计划的若干意见》提出了"积极推进卓越计划学生的国际化培养"的实施要求。"学生的国际化培养"的一个基本条件是学生必须具备一定的外语应用能力,因此,大学英语教学质量的优劣直接关系着外语能力培养目标的成败。本文调查发现,1)学生的教材使用率偏低,教材满意度不高;2)实验组(卓越班)学生对教材评价显著低于对照班(非卓越班);3)教材评价与课堂效果、语言技能具有显著的正相关关系。基于调查结果,我们应该重新审视卓越班大学英语教学,选用和编写优质教材,开展基于"分科英语"理念的教学改革。     

雅安市旅游WebGIS的构建及其存在问题探讨*

基于ArcIMS9.0系统,并结合ArcXML、JavaScript等编程技术、数据库技术及空间数据库引擎ArcSDE,构建了雅安市旅游WebGIS系统。在WebGIS基础平台上,对雅安市旅游资源信息进行采集、存储、管理、分析和图形处理显示,并由图形、图像、文字和声音等多种形式综合展示。针对系统构建过程中遇到的一些主要问题提出了有效的解决方案。针对目前尚未有适合中国国情的地址编码方案问题,率先编制了中国式的地址标准化规则文件和匹配规则文件;利用MapObjects＋VB 6.0开发了地址匹配软件,不仅提高了地址匹配成功率,还大幅度提升了匹配效率;利用TM和DEM等多源信息融合技术解决了三维＂近自然＂地形的显示问题。     

Ionic liquid modified graphene oxide for enhanced flame retardancy and mechanical properties of epoxy resin

In this work, to improve its dispersion and flame retardancy, graphene oxide (GO) was functionalized by silane coupling agent KH550 and 1-butyl-3-methylimidazole hexafluorophosphate (PF₆-ILs), and characteristics of the PF₆-ILs@GO was obtained by transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Then, the synergistic flame retardant of GO or PF₆-ILs@GO and melamine pyrophosphate (MPP) were applied for epoxy resin (EP) materials. Specifically, the limiting oxygen index (LOI) value of EP with 0.1 wt% PF₆-ILs@GO was increased to 29.2% from 27.5% of EP/MPP composites, and the UL-94 test reached the V-0 rating. The CCT results showed that the total heat release (THR) and total smoke release (TSP) of EP/MPP/PF₆-ILs@GO composites were significantly 24.4% and 53.4% lower than that of EP/MPP composites. Besides, the thermal behavior investigated by TGA indicated that the char-forming effect of GO and PF₆-ILs@GO was great, the residual char of EP/MPP/PF₆-ILs@GO composites was as high as 19.5% at 700°C, and its thermal stability was higher than that of EP/MPP composites. On the other hand, the tensile strength of EP/MPP/GO and EP/MPP/PF₆-ILs@GO composites were increased by 15.6% and 28.3% compared with EP/MPP composites. According to SEM analysis, the EP/MPP/GO composites formed a good protective char layer, which can effectively improve flame retardancy of EP. This research represents a new method of flame retardant modified GO to improve the flame retardancy and mechanical properties of polymers.