河南绵毛马兜铃精油化学成分的GC/MS分析

本文报导用毛细管柱气相色谱/质谱技术分离并鉴定绵毛马兜铃精油的化学成分,本文仅报导18种萜类化合物:α-蒎烯、莰烯、β-蒎烯,1,8-桉叶素、莰尼酮、樟脑、莰醇、甲酸冰片酯、醋酸冰片酯、松油醇醋酸酯、顺—左旋—葛缕醇醋酸酯、δ-榄香烯、β-榄香烯、β-石竹烯、β-maaliele、α-古云香烯、古云香烯、γ-榄香烯。     

肉豆蔻挥发油化学成份的GC/MS分析

本文报导用GC/MS技术研究肉豆蔻挥发油的化学成份,鉴定出19种化合物:1.α-蒎烯、2.α-侧柏烯、3.β侧柏烯、4.β-蒎烯、5.香叶烯、6.α-菲兰烯、7.β-松油烯、8.异松油烯、9.丁基苯、10.苧烯、11.γ-松油烯、12.α-松油烯、13.β-松油醇、14.松油醇-4、15.α-松油醇、16.黄樟醚、17.丁子香油酚甲醚、18.(王巴)(王古)烯、19.肉豆蔻醚,并对三个含氧化合物—黄樟醚、丁子香油酚甲醚及肉豆蔻醚的质谱断裂机理进行了探讨。     

“701”防锈剂的试制和研究小结

文中介绍一种新的防锈添加剂,它具有通式 式中: R——C8～22的烃基;A——O或者NH;M——能生成不溶于水的盐的金属根或有机铵基;n——1～10;x、y——由M的原子价决定的整数。对这类防锈添加剂通称为“701”。本文中所采用的R为C_（17）H_（33）（十七烯基）;A为O和NH;M为Ba~( )和单乙醇胺、二乙醇胺形成的有机铵基。阐述了1-羟乙基2—17烯基咪唑啉的合成;“701＂金属盐的合成方法,采用22~＃透平油、10~#机油、25~＃变压器油作为基础油对“701”防锈剂进行了对比试验。     

顶空萃取-气相色谱-质谱法测定一种儿童专用防痱止痒水的挥发性成分

采用顶空萃取-气相色谱/质谱法分析鉴定防痱止痒水的挥发性成分。结果表明：共检测出35种挥发性成分,主要成分为乙醇和酞酸二乙酯,其它成分主要包括醇、烯、酯、甘菊环等。检出的物质中,α-蒎烯、β-蒎烯、莰烯、桉叶醇、樟脑、α-萜品醇、龙脑、醋酸异龙脑酯、石竹烯为野菊花挥发油的有效成分;苯甲酸甲酯、苯甲酸苄酯、丁香酚为金银花挥发油的有效成分;广藿香醇为广藿香提取物的主要成分。α-蒎烯、β-月桂烯、β-蒎烯、莰烯、薄荷醇、丁香酚等成分都具有较强的驱避蚊虫的作用。     

科技成果转让

1.扬州市金陵特种涂料厂在前进该厂是生产特种涂料的专业厂,生产经验丰富,技术力量较强。主要产品有金陵牌70型系列带锈涂料(学名—H06环酚烯带锈油漆),金陵牌88—1系列玻璃磷片防腐涂料等,可广泛用于矿山金属设备防腐。     

吹扫捕集-气相色谱/质谱/嗅闻法分析陈皮特征头香香气成分

采用吹扫捕集法富集陈皮中的头香成分,并利用气相色谱-质谱联用对其进行分离鉴定,结合嗅辨仪确认关键致香成分。结果表明,陈皮的香气来源于烯烃类成分,共鉴定出8种烯烃类挥发性香味成分,D-柠檬烯是陈皮特征香气的主要成分,其余香气成分有γ-松油烯、β-月桂烯、α-蒎烯、β-蒎烯、邻伞花烃、异松油烯、莰烯。     

气相色谱-质谱法分析油杉枝精油的化学成分

为了促进松科植物油杉 (Keteleeria fortunei)的合理开发利用 ,本研究利用水蒸气蒸馏法提取油杉枝精油 ,采用气相色谱 -质谱法 (GC/MS)对其化学成分进行分析 ,分离鉴定出 2 0种化学成分 ,主要有 (-) -β-榄香烯 (2 .0 9% )、β-石竹烯 (67.42 % )、艹律 草烯 (1 1 .5 7% )、大根香叶烯 (3 .3 2 % )和石竹烯氧化物 (5 .60 % )。已鉴定化合物占总离子流出峰面积的 96.88%。     

国产GFR-81K2药芯焊丝在大型双金属全容低温储罐上的开发与应用

1．项目简介 丙烯是一种重要石油化工基本原料，近年来由于对丙烯、液化石油气（LPG）需求量的快速增加，用以储存丙烯、丙烷以及LPG的大型低温储罐建设方兴未艾。     

CF—62钢焊制球罐的制造工艺规程(草案)

本规程仅适用于CF-62钢焊制城市煤气、氧气、氮气及丙烯等类型球形储罐(以下简称球罐)的制造;对由日本引进的HT60CF钢焊制同类球罐的制造工艺也可参照本规程执行。1.球罐制造及验收技术要求应按J B1127—     

豚草及三裂叶豚草挥发物成分的GC和GC／MS分析

本文运用ＸＡＤ－４和ＧＤＸ１０４树脂吸附的方法，对豚草（Ａｍｂｒｏｓｉａａｒｔｅｍｉｓｓｉｆｏｌｉａ）和三裂叶豚草（Ａ．ｔｒｉｆｉｄａ）的挥发物进行了研究，发现ＸＡＤ－４和ＧＤＸ１０４在吸附两种杂草挥发物的性能上基本相同．豚草挥发物的主要成分为：α－蒎烯、β－蒎烯、莰烯、２－冰片烯；三裂叶豚草的挥发物主要为：２，４－二甲基瘐烷、α蒎烯、２，６，７－三甲基癸烷、５－甲基壬烷、２－冰片烯．这些研究结果表明两种豚草挥发物的成分差别较大，对进一步研究它们的化感作用有重要意义。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....