Study on High-Performance Computing for Simulation of End Milling Force

Milling Process Simulation is one of the important re search areas in manufacturing science. For the purpose of improving the prec ision of simulation and extending its usability, numerical algorithm is more and more used in the milling modeling areas. But simulative efficiency is decreasin g with increase of its complexity. As a result, application of the method is lim ited. Aimed at above question, high-efficient algorithm for milling process sim ulation is studied. It is important for milling process simulation’s applicatio n. Parallel computing is widely used to solve the large-scale computation question s. Its advantages include system flexibility, robust, high-efficient computing capability and high ratio of performance to price. With the development of compu ter network, utilizing the computing resource in the Internet, a virtual computi ng environment with powerful computing capability can be consisted by microc omputers, and the difficulty of building hardware environment which is used to s upport parallel computing is reduced. How to use network technology and parallel algorithm to improve simulative effic iency for milling forces simulation is investigated in the paper. In order to pr edict milling forces, a simplified local milling forces model is used in the pap er. End milling cutter is assumed to be divided by r number of differential elem ents along the axial direction of the cutter. For a given time, the total cuttin g forces can be obtained by summarizing the resultant cutting force produced by each differential cutter disc. Divide the whole simulative time into some segmen ts, send these program’s segments to microcomputers in the Internet and obtain the result of the program’s segments, all of the result of program’s segments a re composed the final result. For implementing the algorithm, a distributed Parallel computing framework is de signed in the paper. In the framework, web server plays a role of controller. Us ing Java RMI(remote method interface), the computing processes in computing serv er are called by web server. There are lots of control processes in web server a nd control the computing servers. The codes of simulative algorithm can be dynam ic sent to the computing servers, and milling forces at the different time are c omputed through utilizing the local computer’s resource. The results that are ca lculated by every computing servers are sent to the web server, and composed the final result. The framework can be used by different simulative algorithm. Comp ared with the algorithm running single machine, the efficiency of provided algor ithm is higher than that of single machine.

单糖的柱前衍生化高效液相色谱及胶束电动毛细管色谱分析的对比研究

采用1 苯基 3 甲基 5 吡唑啉酮(PMP)衍生糖类物质,通过简化衍生方法,优化分析条件,采用胶束电动毛细管色谱(MEKC)和高效液相色谱(HPLC)两种方法对5种还原单糖的PMP衍生物实现了良好的分离。5种还原单糖衍生物的保留时间的重现性较好(MEKC法的相对标准偏差(RSD)小于5%(n=5),HPLC法的RSD为0 23%(n=5))。用所建立的两种方法对实际样品中的糖进行了分析,结果表明所建方法可作为实际样品中单糖分析的常规方法。

复合射孔技术及其应用

复合射孔是射孔和高能气体压裂相结合对近井地层进行改造的一项新技术。阐述了复合射孔的增产机理 ,介绍了复合射孔器的结构、性能指标及施工工艺 ,总结了中原油田测井公司推广该技术的应用情况及效果。结果表明 :复合射孔是一项技术先进、工艺可靠、地质增效的射孔技术 ,具有广阔的推广应用前景。

双复140型定向射孔器的研制及其在郑科平1井的应用

介绍了胜利油田郑科平 1井的地质概况、所属区块的油藏特征以及对射孔施工的要求。对射孔枪的材质、定向方式、射孔弹结构、药量 ,射孔弹的布孔方式等进行理论分析和现场试验 ,从而研制出了双复 14 0型定向射孔器 ,并对其设计思路、设计难点、现场试验结果作了详细介绍 ,在郑科平 1井的应用中达到应有的效果。

柔性复合管内衬层在介质中的性能变化规律研究

柔性复合管一般由三部分组成,外层为功能保护层,中间层为增强材料层,内衬层可以是具有耐腐蚀性,阻燃抗静电等功能的热塑性塑料。主要通过研究内衬层材料在高温高压釜模拟介质中的质量尺寸、密度、维卡软化温度以及拉伸强度的变化,得出柔性复合管内衬层在介质中的性能变化规律。

HPLC-荧光法测定贝伐珠单抗注射液中聚山梨醇酯20的含量

目的采用HPLC-荧光法测定贝伐珠单抗注射液中聚山梨醇酯20的含量。方法对HPLC色谱条件进行优化后,检测贝伐珠单抗注射液中聚山梨醇酯20含量,并进行方法的专属性、线性、准确度、精密度、检测限、耐用性验证。用建立的方法检测3批贝伐珠单抗注射液中聚山梨醇酯20的含量。结果该方法专属性良好;聚山梨醇酯20浓度在0.20~0.60 mg/mL范围内,线性关系良好,R^2=0.999 9;不同浓度的聚山梨醇酯20溶液检测结果的准确度在98%~100%范围内,RSD为0.8%;精密度各考察项RSD均不高于2%;检测限为0.002 0 mg/mL;耐用性各考察项与原始条件的相对百分比均在100%~102%范围内。3批贝伐珠单抗注射液中聚山梨醇酯20的含量分别为0.40、0.39和0.39 mg/mL,分别为标示量(0.40 mg/mL)的100%、98%和98%。结论建立的HPLC-荧光法快速、准确、可靠,可用于测定贝伐珠单抗注射液中聚山梨醇酯20的含量。