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排序方式: 共有10000条查询结果,搜索用时 78 毫秒
991.
<正>1存在的问题我公司生料磨型号为ATOX50,该立磨自2008年3月投产以来,磨况较稳定。截止到2015年夏季,为了满足更严格的环保排放要求,窑尾电收尘更换为电袋复合型收尘器。技改收尘后,收尘效果提高,粉尘含量由25 mg/m~3下降到15 mg/m~3左右,收尘器进出口压差由1 500 Pa增加到2 500 Pa左右,运行阻力增加较多;磨机台时产量下降了25 t/h,磨机振动在0.5~0.7mm之间,压差偏高达6700~7200Pa,料层 相似文献
992.
Yixiu Wang Chao Li Fanchao Meng Shuling Lv Jintao Guo Xiaoqin Liu Chongqing Wang Zhengfei Ma 《Frontiers of Chemical Science and Engineering》2014,8(3):340-345
A CuAlCl4 doped metal organic framework, CuAlCl4@MIL-101, was prepared by introducing CuAlCl4 into the pores of MIL-101 for the selective adsorption of CO over N2. The CuAlCl4 molecules were evenly distributed into various pores sizes and did not change the intrinsic structure of the MIL-101. Isotherms for CO and N2 adsorption at 298 K showed that the CO capacity on CuAlCl4@MIL-101 was much higher than that on virgin MIL-101, whereas the N2 capacity decreased. The selectivity for CO over N2 improved from 4.64 to 31.5 at 298 K and 1 bar. The CuAlCl4@MIL-101 adsorbent displayed outstanding CO adsorption stability and the adsorbent could be regenerated by applying a simple vacuum of 4 mmHg. 相似文献
993.
结合园林水景多变的状态、多变的感官感受、多变的意境特征,对排比、通感、夸张、引用、比拟五种修辞手法在水景营造中的应用技巧进行了探讨,指出在水景的营造中适宜地运用修辞手法可使水景设计更加合理、动人,从而提高景观品质。 相似文献
994.
995.
Novel precipitant prepared through carbonation with MgCl2 wastewater generated from rare earth extraction separation process and low-price dolomite as raw materials was studied in this paper. The purification methods of novel precipitant by adding appropriate oxidizing agent were studied. It was found that optimal purification result could be achieved with sodium hypochlorite as iron removal reagent and the iron removal rate could reach up to 90% when the adding amount was 0.1 vol.%. During the preparation, the particle size and distribution of ceria-based polishing powder were affected obviously by the parameters such as concentration, reaction temperature and feeding rate. The results showed that ceria-based polishing powder with D50 =2.5-3.5 μm and the particle size distribution of 0.65-0.75 μm could be prepared when the concentration of CeCl3 was 0.6 mol/L, the reaction temperature was maintained at 50 °C and the feeding speed was controlled at 25 ml/min. Compared with commercial powder, the self-made polishing powder had roughly the same cutting amount, but the surface finish of polished glass was better than that of commercial polishing powder. 相似文献
996.
Hai Li Meng Zhou Qinghua Guo Renbiao Wu Jiangtao Xi 《Multidimensional Systems and Signal Processing》2018,29(2):719-732
An important issue in low-altitude wind-shear detection is to estimate the wind speed of wind field. In this paper, a novel method for wind speed estimation with airborne phased array radar is proposed by combining space time adaptive processing and compressive sensing. The proposed method is able to achieve accurate wind speed estimate in the condition of limited number of sampling pulses, as demonstrated by numerical examples. 相似文献
997.
998.
Novel poly(3‐hydroxybutyrate) composite films containing bioactive glass nanoparticles for wound healing applications
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Lydia Francis Decheng Meng Ian C Locke Jonathan C Knowles Nicola Mordan Vehid Salih Aldo R Boccaccini Ipsita Roy 《Polymer International》2016,65(6):661-674
Bioactive glass is considered an ideal material for haemostasis as it releases Ca2+ ions upon hydration, which is required to support thrombosis. In this study the effects of the presence of nanoscaled bioactive glass (n‐BG) in poly(3‐hydroxybutyrate) (P(3HB)) microsphere films on the structural properties, thermal properties and biocompatibility of the films were studied. The n‐BG with a high surface area was also tested for its in vitro haemostatic efficacy and was found to be able to successfully reduce clot detection time. In an effort to study the effect of the roughness induced by the formation of hydroxyapatite on cellular functions such as cell adhesion, cell mobility and cell differentiation, the composite films were immersed in simulated body fluid for periods of 1, 3 and 7 days. From scanning electron microscopy images, the surface of the P(3HB)/n‐BG composite microsphere films appeared fairly uniform and smooth on day 1; however on day 3 and day 7 a rough and uneven surface was observed. The presence of hydroxyapatite on the composite microsphere films on day 3 and day 7 influenced the surface roughness of the films. However, when the P(3HB)/n‐BG composite microsphere films with enhanced surface roughness were tested for biocompatibility, reduced amounts of protein adsorption and cell adhesion were observed. This study thus revealed that there is an optimal surface roughness for the P(3HB) microsphere films for increased cell adhesion, beyond which it could be deleterious for cell adhesion and differentiation. © 2016 Society of Chemical Industry 相似文献
999.
Yanqiu Long Hui Zhou Aihong Meng Qinghai Li Yanguo Zhang 《Korean Journal of Chemical Engineering》2016,33(9):2638-2643
The interactions of biomass components (hemicellulose, cellulose, and lignin) during co-pyrolysis were investigated in a thermogravimetric analyzer (TGA) as well as a self-designed Macro-TGA with higher heating rate and larger amount of sample. The overlap ratio (OR) was used to evaluate the interaction of biomass components quantitatively. In TGA, the pyrolysis of xylan was not significantly affected by cellulose, whereas the pyrolysis of cellulose was markedly influenced by xylan. The interactions between xylan and lignin were weak with an overlap ratio of 0.9869, whereas co-pyrolysis of cellulose and lignin was strongly inhibited by interactions with the overlap ratio of 0.9737. In Macro-TGA, interactions between components were stronger than that in TGA due to more considerable heat and mass transfer effect. 相似文献
1000.