静电凝并中荷电粒子的运动方程及近似解   总被引：2，自引：0，他引：2  

高正平  罗惕乾  康灿  王晓英 《中国农机化》2006,(4):65-68

本文分析静电除尘器预凝并粒子的运动情况,研究了荷电气固两相流中粒子运动与气流运动的关系,通过对荷电粒子的受力分析,在粒子运动过程中考虑了库仑力、压差力、附加质量力、Stokes阻力以及Basset力对荷电粒子的作用,而忽略其它力的影响,建立了湍流中描述粒子运动的基本方程—BBO(Basset-Boussinesq-Oseen)方程,用谱分解方法进行求解,并得到荷电粒子凝并运动方程的两组近似解,从而确定了粒子运动与气流运动的关系,αr为近似解的重要参数,随着αr的变化,粒子运动的复杂性随之变化。  相似文献   

“WaterMan”: an on-farm water management game with heuristic capabilities     

Mohammed Z. Shaban  Gary P. Merkley 《Irrigation Science》2016,34(6):483-499

A modern computer-based simulation tool (WaterMan) in the form of a game for on-farm water management was developed for application in training events for farmers, students, and irrigators. The WaterMan game utilizes an interactive framework, thereby allowing the user to develop scenarios and test alternatives in a convenient, risk-free environment. It includes a comprehensive soil water and salt balance calculation algorithm. It also employs heuristic capabilities for modeling all of the important aspects of on-farm water management, and to provide quantitative performance evaluations and practical water management advice to the trainees. Random events (both favorable and unfavorable) and different strategic decisions are included in the game for more realism and to provide an appropriate level of challenge according to player performance. Thus, the ability to anticipate the player skill level, and to reply with random events appropriate to the anticipated level, is provided by the heuristic capabilities used in the software. These heuristic features were developed based on a combination of two artificial intelligence approaches: (1) a pattern recognition approach and (2) reinforcement learning based on a Markov decision processes approach, specifically the Q-learning method. These two approaches were combined in a new way to account for the difference in the effect of actions taken by the player and action taken by the system in the game world. The reward function for the Q-learning method was modified to reflect the suggested classification of the WaterMan game as what is referred to as a partially competitive and partially cooperative game.  相似文献   

Effect of Oyster Mushroom,Pleurotus ostreatus,Extract on Hemato‐Immunological Parameters of Rainbow Trout,Oncorhynchus mykiss          下载免费PDF全文

Gülşen Uluköy  Esİn Baba  Canan Öntaş 《Journal of the World Aquaculture Society》2016,47(5):676-684

The current study investigated the effects of oyster mushroom Pleurotus ostreatus, extract on immunological and hematological parameters of rainbow trout, Oncorhynchus mykiss. The fish were fed diets containing 0 (control), 1, and 2% supplementation of the oyster mushroom extract for 6 wk. Blood samples were collected weekly for the first 6 weeks. After 6 wk of feeding, the fish were challenged with Lactococcus garvieae and mortality was recorded. The results of this study showed that feeding rainbow trout an oyster mushroom extract–supplemented diet stimulated phagocytic activity of phagocytic cells, lysozyme activity, and myeloperoxidase activity in serum, but it did not significantly affect the total serum immunoglobulin level. At the same time, a significant increase was found in the number of neutrophils, monocytes, and total white blood cells. Fish fed the diet supplemented with oyster mushroom extract showed reduced mortalities following L. garvieae infection compared with controls. These results show that supplementation of fish diets with oyster mushroom extract at 1 and 2% concentrations significantly imrpoves hematological parameters and modulates the immune response against L. garvieae in rainbow trout.  相似文献   

Adsorption kinetics of 17α-ethinyl estradiol and bisphenol A on carbon nanomaterials. II. Concentration-dependence     

Bo Pan  Ke Sun  Baoshan Xing 《Journal of Soils and Sediments》2010,10(5):845-854

Purpose  

Carbon nanomaterials (CNMs) have attracted a great deal of research interest for their potential environmental applications because of their unique properties. Adsorption of organic chemicals on CNMs was reported to be important in controlling their environmental risks. However, the kinetics of the adsorption is hardly investigated in literature. The objective of this work was, therefore, to quantitatively describe the sorption kinetics of 17 α-ethinyl estradiol (EE2) and bisphenol A (BPA) on CNMs as compared to activated carbon (AC).  相似文献   

Biochemical properties,molecular characterizations,functions, and application perspectives of phytases     

Ruijuan Li  Jinfeng Zhao  Chuanfan Sun  Wenjing Lu  Chengjin Guo  Kai Xiao 《Frontiers of Agriculture in China》2010,4(2):195-209

As a kind of enzyme widely existing in eukaryotic species, especially in grains and oil seeds, phytases play an important role in the degradation of some phosphates containing organic molecules. So far, phytases derived from various species have been successfully used as animal feed additives. It has also been experimentally verified that phytases have a potential use in generating crop germplasm with high phosphorus use efficiency, based on their biochemical role in releasing Pi from the phytate and its derivatives. In this paper, the biochemical properties, molecular characterizations, functions and the potential application perspective of phytases are reviewed and commented on, aiming at the further exploration of the biochemical and molecular characterizations, and promotion of the application of phytases, a kind of important enzyme possessing potential use in animal feeding and creation of high P use crop cultivars, in the future.  相似文献   

Effect of Ammonium Nitrogen Fertilization Level to Different Normal Saisola Food Production and Quality     

FAN Xin-hua  ZHANG Hong-yan  CHEN Jie  ZHANG Can 《北方园艺》2012,(5)

采用田间试验和化学分析相结合的方法研究了铵态氮肥(磷酸二铵)不同施肥水平对猪毛菜产量及品质的影响,以期确定人工栽培猪毛菜的铵态氮肥的合理施肥量.结果表明:随着施肥量的增加,猪毛菜的产量、氨基酸含量、维生素C含量均有不同程度的升高,达到一定施肥量时则呈降低趋势,只有硝酸盐含量达到一定施肥量时陡然降低,之后又升高,为了保证高产优质,人工栽培猪毛菜的铵态氮肥的合理施肥量应为57.5 g/m2(或570 kg/hm2)左右.  相似文献   

Organization and promoter analysis of the zebrafish (<Emphasis Type="Italic">Danio rerio</Emphasis>) chemokine gene (CXC-64) promoter     

Li-Chen Chen  Jen-Leih Wu  Chyuan-Yuan Shiau  Jyh-Yih Chen 《Fish physiology and biochemistry》2010,36(3):511-521

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Identification of molecular markers linked to the genes for purple grain color in wheat (<Emphasis Type="Italic">Triticum aestivum</Emphasis>)     

Xing-Pu Li  Su-Que Lan  Ye-Lun Zhang  Yu-Ping Liu 《Genetic Resources and Crop Evolution》2010,57(7):1007-1012

Pericarp color in wheat is an important trait related to nutrients and health benefits. Identification of molecular markers closely linked to the grain color genes will help utilize pericarp trait in wheat breeding. Genetic studies involving F₁, F₂, and F₃ populations from the cross Jizi 439 (purple grain)/Gao8901 (white grain) showed that the purple grain color was controlled by two genes. By using the bulked segregant analysis (BSA) approach, two DNA pools were established from the dark purple-grain and white-grain plants respectively. Among the 230 pairs of microsatellite primers used in this study, two markers showed polymorphism in DNA pools, parents, F₁ and F₂ populations. Linkage analysis indicated that the two markers Xgwm47 and Xgwm155 were linked with two purple pigment genes. One of the purple pigment genes is located on chromosome 2AS and is 34.7cM away from the marker Xgwm47, whereas another gene is mapped on 3AL with 14.7cM away from marker Xgwm155.  相似文献   

C. Clare Hinrichs and Thomas A. Lyson (eds.): Remaking the North American Food System: Strategies for Sustainability     

Molly D. Anderson 《Agriculture and Human Values》2009,26(3):251-252

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Support vector machine-based QSPR for the prediction of glass transition temperatures of polymers     

Xinliang Yu 《Fibers and Polymers》2010,11(5):757-766

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