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同志们: 我们开了一个很好的会,我们讨论并通过了色谱学会的章程(附件三)、优秀论文评选暂行办法(附件四),选举了理事会理事31人(附件五)、常务理事9人、正副理事长各一人,任命了秘书长一人,副秘书长二人(附件六),还讨论了学会今后的工作,大家发表了很好的意见,与会代表,热烈响应秘书长王治国同志提出的成立中国色谱学会色谱奖的建议,并授权秘书长组织人员拟定方案交常务理事会讨论。这次会议的召开和全国色谱学会的 相似文献
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爆轰驱动对钨珠终点弹道性能的影响 总被引:1,自引:0,他引:1
通过实验比较了理想球形钨珠和经历爆轰驱动的钨珠(初始为球形)主要终点弹道性能的差异,结果表明:(1) 钨珠经爆轰驱动后,发生轻微的质量损失和变形现象,直径6.0 mm和7.5 mm钨珠的质量损失平均为8.4%;(2) 对于理想球形钨珠,在同一初始速度条件下,衰减系数为常数,空气阻力系数仅与初始速度有关,两者成线性关系,而对于经历爆轰驱动的钨珠,衰减系数不再为常数,空气阻力系数与飞行速度有关,两者成线性关系;(3) 爆轰驱动明显降低了钨珠的穿甲能力,但长距离飞行后,钨珠仍具有较强的穿甲能力,是破片式战斗部或杀爆战斗部较理想的选择。 相似文献
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Model predictive inverse method for recovering boundary conditions of two-dimensional ablation 下载免费PDF全文
A model predictive inverse method (MPIM) is presented to estimate the time- and space-dependent heat flux onthe ablated boundary and the ablation velocity of the two-dimensional ablation system. For the method, first of all, therelationship between the heat flux and the temperatures of the measurement points inside the ablation material is establishedby the predictive model based on an influence relationship matrix. Meanwhile, the estimation task is formulated as aninverse heat transfer problem (IHTP) with consideration of ablation, which is described by an objective function of thetemperatures at the measurement point. Then, the rolling optimization is used to solve the IHTP to online estimate theunknown heat flux on the ablated boundary. Furthermore, the movement law of the ablated boundary is reconstructedaccording to the estimation of the boundary heat flux. The effects of the temperature measurement errors, the numberof future time steps, and the arrangement of the measurement points on the estimation results are analyzed in numericalexperiments. On the basis of the numerical results, the effectiveness of the presented method is clarified. 相似文献