Effect of Flats Speed on Card Sliver Quality

The effect of flats speed,especially higher flats speed,on card sliver quality was studied.Card sliver produced at seven flats speeds was tested with Uster AFIS.Test results show that over-high flats speed is not beneficial to removing impurities and neps of card sliver.The flats speed from 450 to 550 mm/min is the best for removing impurity;while a speed of 450 or 650 mm/min is the best for removing neps of card sliver.The 1 050 mm/min flats speed is the best for removing short fibers.Accordingly,the flats...     

A Comparative Analysis on Testing Stability of Seed Coat Neps （SCN） Number and Size with AFIS and Premier aQura

This paper makes a comparative analysis of testing stability of seed coat neps (SCN) number and size with Advanced Fiber Information System (AFIS) and aQura.After testing the number and size of SCN in sliver produced by two different experiments (twelve plans in each experiment)with AFIS and aQura,the test results are analyzed with the theory of statistical analysis and the following conclusions are drawn:(1) the testing stability of SCN number and size of aQura is better than that of AFIS;(2) to get a reli...     

1-(2-羟乙基)-3-甲基咪唑溴化盐的合成及其催化性能研究

以1-甲基咪唑和2-溴乙醇为原料合成了羟基功能化离子液体1-(2-羟乙基)-3-甲基咪唑溴盐([OH-C_2im]Br),并对其结构进行了元素分析、红外光谱和核磁共振氢谱表征。将合成产物用于催化二氧化碳(CO_2)和环氧丙烷(PO)合成环状碳酸丙烯酯(PC),考察了反应温度、反应压力和反应时间对产物催化性能的影响。结果表明:CO_2压力为2.0 MPa,温度为115℃,反应时间为60 min时,催化效果最好。通过用波函数Multiwfn 3.4.1和VMD 1.9分析离子液体分子表面静电势(ESP)和平均局部离子化能(ALIE),在B3LYP/6-31+G(d,p)理论水平下计算反应路径的能量变化,进行了合成产物催化作用机理研究,发现当离子液体参与反应时,降低了反应的活化能,从而加快了反应速率。     

Test Stability of Uster Advanced Fiber Information System（AFIS）

To study test stability of Advanced Fiber Information System(AFIS),card sliver produced in two experiments(12 plans in each experiment)were tested by AFIS.By a statistic analysis of the test results,the number of test times that can get a reliable test reliability(hereinafter this number of test times is referred to as Reliable Test Times,RTT)of test parameters and the coefficient of variation(CV%)values of 30 test results of each experiment plan were obtained.It's concluded that some parameters,such as len...     

Effect of Voltage and Gauge of Electrostatic Plate on Card Sliver Quality

In order to find the effect of state device installed on a carding machine on card sliver quality, card slivers produced in conditions of different voltages and gauges were tested by USTER AFIS. The results show that, when the gauge is 1 nun, most parameters of card sliver quality are better when voltage is 600 V than those when no voltage is applied. The contents of nep, trash, visible foreign matter （VFM） and short fiber content by number （SFCn）, short fiber content by weight （SFCw）, immature fiber content （IFC） of card sliver decrease by 5.9%, 16.7%, 12.5%, 5.3%, 4.8% and 1.6%, respectively, but seed coat nep （SCN） content of card sliver doesn＇t decrease. When the electrostatic plate gauge is 2 mm and electrostatic voltage is 4000 V, the removal efficiency of neps and SCN is remarkable, decreasing by 8.7% and 25% respectively. Card sliver quality is hardly improved under any voltage when the gauge between electrostatic plate and cylinder is 3mm.     

Uster AFIS棉结数量测试结果可靠性的研究

研究了User AFIS单纤维测试系统棉结数量稳定的测试次数问题.对8次实验313个不同工艺实验方案中生条的棉结和带籽屑棉结数量的测试结果的CV%值进行了统计分析,根据有关检测结果估算了不同水平条件下棉结和带籽屑棉结数量检测的稳定次数.认为用AFIS检测棉结数量采用10次,其结果的波动性较大;检测带籽屑棉结数量采用10次是相当不可靠的.原料和加工条件对棉结检测结果也有影响.AFIS棉结检测结果不可靠的原因在于其所取样品量太小,建议Uster AFIS增加检验样品量和检测的次数.     

基于能值理论的节水农业综合效益量化方法

节水农业工程的实施会对地区经济、社会和生态环境造成多方面的影响,建立科学合理的量化方法,定量分析节水农业综合效益,有利于规模化节水农业发展.基于生态经济学能值理论,分析了节水农业经济、社会和生态环境正负效益的构成,以能值作为统一的度量尺度,提出了节水农业综合效益的量化方法.以河套灌区沈乌灌域2016年节水改造工程为例进...