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排序方式: 共有272条查询结果,搜索用时 15 毫秒
31.
G. Dongowski 《Food chemistry》2007,104(1):390-397
Binding in small intestine and excretion of bile acids constitute a major hypocholesterolemic pathway. Interactions between different types of commercial and laboratory-made dietary fibres and glycoconjugated bile acids were investigated in vitro at pH 5.0 and 6.5. The interactions were greater at the lower pH and with dihydroxy-bile acids. Digested cereal products (barley, oat, rye and wheat flour; oat bran), alcohol-insoluble substances from apples, strawberries, rowan berries, carrots, white cabbage, red beets and sugar beet pulp, as well as arabinoxylan, bound 1.21–1.77 μmol bile acids/100 mg of preparation at pH 5.0. Novelose bound approximately 0.65 μmol bile acids/100 mg. Carob fibre had the highest binding capacity (1.83–1.96 μmol bile acids/100 mg) whereas cellulose had no effect. Besides the source and chemical composition, the bile acid binding correlated especially well with the presence of three-dimensional cell wall structures of the tested preparations but less well with the proportions of soluble and insoluble dietary fibre. 相似文献
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Effect of weight,height and BMI on injury outcome in side impact crashes without airbag deployment 总被引:1,自引:0,他引:1
Chinmoy Pal Okabe Tomosaburo K. Vimalathithan M. Jeyabharath M. Muthukumar N. Satheesh S. Narahari 《Accident; analysis and prevention》2014
A comprehensive analysis is performed to evaluate the effect of weight, height and body mass index (BMI) of occupants on side impact injuries at different body regions. The accident dataset for this study is based on the National Automotive Sampling System-Crashworthiness Data System (NASS-CDS) for accident year 2000–08. The mean BMI values for driver and front passenger are estimated from all types of crashes using NASS database, which clearly indicates that mean BMI has been increasing over the years in the USA. To study the effect of BMI in side impact injuries, BMI was split into three groups namely (1) thin (BMI < 21), (2) normal (BMI 24–27), (3) obese (BMI > 30). For more clear identification of the effect of BMI in side impact injuries, a minimum gap of three BMI is set in between each adjacent BMI groups. Car model years from MY1995–1999 to MY2000–2008 are chosen in order to identify the degree of influence of older and newer generation of cars in side impact injuries. Impact locations particularly side-front (F), side-center (P) and side-distributed (Y) are chosen for this analysis. Direction of force (DOF) considered for both near side and far side occupants are 8 o’clock, 9 o’clock, 10 o’clock and 2 o’clock, 3 o’clock and 4 o’clock respectively. Age <60 years is also one of the constraints imposed on data selection to minimize the effect of bone strength on the occurrence of occupant injuries. AIS2+ and AIS3+ injury risk in all body regions have been plotted for the selected three BMI groups of occupant, delta-V 0–60 kmph, two sets (old and new) of car model years. The analysis is carried with three approaches: (a) injury risk percentage based on simple graphical method with respect to a single variable, (b) injury distribution method where the injuries are marked on the respective anatomical locations and (c) logistic regression, a statistical method, considers all the related variables together. Lower extremity injury risk appears to be high for thin BMI group. It is found that BMI does not have much influence on head injuries but it is influenced more by the height of the occupant. Results of logistic analysis suggest that BMI, height and weight may have significant contribution towards side impact injuries across different body regions. 相似文献
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在分析和讨论了通导设备AIS的发射技术的基础上,分别就时分多址、时域和频域层面说明信道的有限性和电磁辐射特性。然后针对船舶终端的只收不发的需求,提出三个解决方案。 相似文献
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Traffic simulation based ship collision probability modeling 总被引:1,自引:0,他引:1
Maritime traffic poses various risks in terms of human, environmental and economic loss. In a risk analysis of ship collisions, it is important to get a reasonable estimate for the probability of such accidents and the consequences they lead to. In this paper, a method is proposed to assess the probability of vessels colliding with each other. The method is capable of determining the expected number of accidents, the locations where and the time when they are most likely to occur, while providing input for models concerned with the expected consequences. At the basis of the collision detection algorithm lays an extensive time domain micro-simulation of vessel traffic in the given area. The Monte Carlo simulation technique is applied to obtain a meaningful prediction of the relevant factors of the collision events. Data obtained through the Automatic Identification System is analyzed in detail to obtain realistic input data for the traffic simulation: traffic routes, the number of vessels on each route, the ship departure times, main dimensions and sailing speed. The results obtained by the proposed method for the studied case of the Gulf of Finland are presented, showing reasonable agreement with registered accident and near-miss data. 相似文献
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提出了一套结合特征筛选及参数设定的方法,使用支持向量机来辨别肿瘤良恶性,并利用人工免疫算法进行特征筛选及决定支持向量机的参数。针对由PHILIPS ATL HDI 3000超声波扫描仪获得的220幅图片的处理结果显示,在此所提出的方法能使乳房肿瘤的分类正确率达到95.71%,并大幅缩短支持向量机的训练时间。 相似文献
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船舶自动识别系统(AIS)VHF接收机的设计 总被引:1,自引:0,他引:1
VHF接收机是船载自动识别系统(AIS)的关键部件之一,其性能直接影响到AIS系统自组织组网的优劣、接收船舶的数目多少及所能接收到最远船只的距离远近。本文根据国际海事组织(IMO)有关标准,给出了一种船舶自动识别系统中VHF接收机的设计方案。文中简介了接收机的工作原理,给出了基于MAX2306的VHF接收机的硬件和软件设计。实验测试和实际应用表明该接收机的接收灵敏度、邻信道选择性等都已达到规定的要求,并且该接收机结构简单、性能稳定,易于批量化生产。 相似文献
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