转换曲线分光光度法测定复方替硝唑胶囊的含量

用转换曲线分光光度法对复方替硝唑胶囊中的替硝唑和氧氟沙星组分进行定性和定量，如以0.1mol/L盐酸为溶剂，在波长310－260nm波长范围，转换曲线的最小值在波长294nm处，可用于定性。如以274nm,282nm,290nm和298nm定量，替硝唑的回收率100．24％，100．47％，100．56％，100．35％（平均回收率为100．40％，RSD为0．14％）；氧氟沙星的回收率为99．97％，99．91％，99．76％，99．95％（平均回收率为99．90％，RSD为0．10％）。用转换曲线分光光度法，对复方替硝唑胶囊定性，定量分析具有准确实用的价值。     

管线钢用MgO-CaF2-Al2O3-SiO2渣系烧结焊剂

研究了适用于X60、X65级管线钢埋弧焊烧结焊剂，其组成为MgO-CaF2-Al2O3-SiO2，研究了各成分对焊接工艺性能和熔敷金属中扩散氢含量的影响规律及熔敷金属的力学性能与组织。结果表明：其碱度BⅡW为2．3，组分为17％～23％Al2O3，16％～24％CaF2，31％～43％MgO，9％～16％SiO2，5％～13％CaCO3，0％～9％MnO，1％TiO2，其余为5％时，脱渣性良好，焊缝成形美观，熔敷金属中扩散氢含量为2．59mL／100g，达到低氢水平；与合适的焊丝配合，其力学性能以及-20℃低温冲击韧度均满足X60、X65管线钢的焊接要求。     

新疆春小麦籽粒中氨基酸与蛋白质的关系

测试１００个品种表明，春小麦籽粒中含有丰富的营养成分，蛋白质平均含量为１４．４８％，８９％的材料在１３．００％以上，氨基酸平均含量为１４．００％，９３％的材料在１１．００％以上。     

野生大麦的主要营养成分与它们的相互关系

对我国不同地区收集的１１２６份野生大麦种质资料材料分析测定表明：野生皮大麦７２９个样品，蛋白质平均含量为１４１２％，材料含量在１２００％以上的占７３１１％。赖氨酸的平均含量为０４３％，材料含量在０４０％以上的为７５３１％。粗淀粉平均含量为５１３３％。材料含量在５０００％以上的点６４２０％。野生裸大麦３９７个样品。蛋白质平均含量为１３８２％，材料含量在１２００％以上的占７０４６％。赖氨酸平均含量０４４％，材料含量在０４０％以上的占８４１３％。粗淀粉平均含量为５８３４％，材料含量在５０００％以上的占９８７４％，野生皮大麦的裸大麦主要营养成份有明显的差异，彼此之间有一定的相关性     

顶空气相色谱法测定血清中微量游离碘

根据碘离子与硫酸二甲酯反应生成碘甲烷的原理，应用顶空气相色谱法测定了血清中的微量碘，无需消化处理等步骤。方法标准偏差为０．０５１％￣０．０８３％，变异系数为０．７２％￣２．２９％，平均回收率为９２．９６％。     

顶空气相色谱法测定六神香水中的甲醇

本文应用顶空气相色谱法测定六神地水中的甲醇，具有操作简便快速，准确灵敏，干扰因素少等优点，精密度０。０７５－０。０９９，变异系数０。５４％－１。７９％，回收率为９８。０５％－１００。３２％，平均回收率为９９。０６％。     

开氏消煮-常量蒸馏-纳氏试剂光度法测定土壤中的全氮量

采用开氏消煮-常量蒸馏-纳氏试剂光度法测定土壤中的全氮量，其变异系数为1．9％～3．4％，蒸馏试验回收率为93％～11％，与经典的测定方法相比，相对误差为0．9％～3．4％。该方法和经典的半微量一滴定法相比，操作简便，且适合大批A量样品的测定。     

渣系组分对碱性药芯焊丝渣覆盖性的影响

研究了渣系组分对碱性药芯焊丝熔渣覆盖性的影响，重点考察了渣系组分中氧化镁、石英、氟化钙和金红石对熔渣覆盖性的影响规律，分析了其影响原因。结果表明：渣系组分中MgO为22％～25％，SiO2为5％～8％，CaF2为15％左右，TiO2为13％～15％时，熔渣覆盖性较好。MgO含量过多会使熔渣粘度增大，导致熔渣产生抱团现象；SiO2含量过多会使熔渣变稀，覆盖不好；CaF2含量过多会使熔渣局部覆盖不良，继而成团状，往焊缝两侧分开。     

长江轴承划入出口“二类企业”

经国家质检总局和重庆进出口检验检疫局考核批准，重庆长江轴承工业有限公司近日进入了重庆市出口“二类企业”行列。今后，重庆出入境检验检疫局由过去的批批检验，改为一定比例的抽查。抽查比例为，一类企业为总批次的5％～15％，二类企业为30％～45％，     

顶空气相色谱法快速测定餐具洗涤剂中甲醇含量

应用气液平衡顶空ＧＣ法测定了餐具洗涤剂中的甲醇含量。样品无需处理，操作简便、快速、灵敏度高。精密度为０．００９～０．１５，变异系数为２．０％～２．５％，回收率为９８．０２％～１００．０９％，平均回经为９９．３７％。     

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...     

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。     

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。     

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.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

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。     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...