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This paper modifies a mathematical model for distillation with two liquid phases so as to suit for thermally coupleddistillation with two liquid phases and advances an algorithm based upon the modified Naphtali-Sandholm method.Thestructures of Jacobi matrix and its submatrices of all types are given.The multiple phase flash method combined with acomparison of free energies for determination of the liquid phase split in stage is used.Seperation of butanol-water-propanol ternary system is employed to justify the method mentioned above.Satisfactory results are obtained. 相似文献
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大力发展装饰装修材料的必要性建筑物的装饰就象人们的时装一样,已经成为现代生活中越来越亮丽的一道风景线。而装饰装修所用的材料则是品种门类繁多、更新换代周期最快,发展过程最为活跃,发展潜力最大的一类建筑材料。其发展速度的快慢、品种的多少、质量的优劣、款式的新旧、配套水平的高低,决定着建筑物装饰档次的高低,对美化城乡建筑改善人民居住和工作环境,有着十分重要的意义。 相似文献
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大蒜测土配方营养套餐施肥技术 总被引:1,自引:0,他引:1
介绍大蒜测土配方套餐施肥方案的设计原则及施肥的具体技术方案。根据大蒜喜钾、喜硫的需肥特点,除基肥施(667m2)2000kg农家肥、50kg生物有机肥及16-10-22的复混肥100kg外,并追施(随水冲施)高氮全营养肥(21-8-11)2.5kg、高钾全营养肥(12-12-17)12.5kg各2次,叶面肥喷施若干次,并使用大蒜凯普克促进根系生长。通过3年大面积示范试验,与常规施肥对照,大蒜年平均增产14.4%,667m2净增产量约235kg,净增产值约643元。 相似文献
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高密度电阻率法在古墓探测中的应用 总被引:2,自引:1,他引:2
在古墓探测中如果采用电测深法,存在测点密度不大、信息量小等缺点。对于某些探测物来说,存在着资料解释困难的现象。为了解决上述问题,笔者引进了一种新方法—高密度电阻率法,经过近几年对不同探测物的勘探应用,认为高密度电阻率在古墓探测中,是一种简单,易行,高效的方法。 相似文献
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黄县断陷盆地充填演化与煤聚积规律 总被引:4,自引:0,他引:4
研究了黄县含煤盆地沉积充填序列、沉积组合及其空间配置,识别出4种沉积体系类型:划分出2个Ⅲ级层序;分析了盆缘断裂的活动特点及煤的聚积规律,研究表明,盆缘断裂的活动控制盆地的形成、发展和演化。盆地充填沉积序列可划分出2个构造-沉积旋回,其沉积体系构成主要有冲积体系,其中以低水位-水进体系域中的扇 三角洲、辫状河、滨浅湖-湖沼沉积体系与深湖-浊积沉积体系,其中以低水位-水进体系域中的扇三角洲、辫状河、 相似文献
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A simple and easy hydrothermal process has been employed to synthesize flower-like ZnO products consisting of numerous orderly oriented and bundled nanorods.The structure and morphology of the novel ZnO structure are characterized in detail.The flower-like ZnO-nanorod-based gas sensors are investigated for their ethanoi-sensing properties,and the results reveal that the sensors exhibit a high response of 143.6 to 1000 ppm ethanol and good selectivity at the optimal operating temperature of 250℃.The effect of the flower-like morphology on the response of the gas sensors to ethanol is also investigated. 相似文献
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In2O3-Fe2O3 nanotubes are synthesized by an electrospinning method. The as-synthesized materials are characterized by scanning electron microscope and X-ray powder diffraction. The gas sensing results show that In2O3-Fe2O3 nanotubes exhibit excellent sensing properties to acetone and formaldehyde at different operating temperatures. The responses of gas sensors based on In2O3-Fe2O3 nanotubes to 100 ppm acetone and 100 ppm formaldehyde are 25 (240℃) and 15 (260℃), and the response/recovery times are 3/7 s and 4/7 s, respectively. The responses of In2O3-Fe2O3 nanotubes to 1 ppm acetone (240℃) and formaldehyde (260℃) are 3.5 and 1.8, respectively. Moreover, the gas sensor based on In2O3-Fe2O3 nanotubes also possesses an excellent selectivity to acetone and formaldehyde. 相似文献
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