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赎罪

作者： (英)i.·麦克尤恩

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爱因斯坦·毕加索

作者： (英)阿瑟·i. 米勒

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修补裂痕

作者： (英)i.·休伊特

Brushless DC Generator Controlled by Constrained Predictive Algorithm

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Journal of Energy and Power Engineering 2011年第8期5卷 750-758页

作者： G. Gatto i. Marongiu A. Perfetto A. Serpi Electrical and Electronic Engineering Department University of Cagliari Cagliari 09123 Italy Electrical Engineering Department University ＂Federico 11＂ of Naples Naples 80138 Italy

The brushless DC generator controlled by a predictive algorithm is considered in this paper. it is able to develop excellent performances such as minimum Joule losses and minimum torque ripple, at the same time. The tracking characteristic of the prime-mover is mandatory for setting the reference value of the electromagnetic torque developed by the generator, by means of which the switching pattern of the AC/DC converter is determined at each sampling time interval. The above generator performances are possible under certain constrained values of reference torque and rotor speed, due to the DC-bus voltage saturation. The knowledge of these quantities are necessary for the best matching of the prime-mover with the brushless DC generator and the AC/DC converter. in this paper, these constraints are investigated in detail with the aim of highlighting the best operation of the conversion s） stem under a constant DC bus voltage.

关键词： Brushless machines permanent magnet generators predictive control

ANTAGONiSTiC EFFECTS OF GRANULOCYTE DERiVED iNHiBiTORS AND CYTOKiNES ON APOPTOSiS iN POLYMORPHONUCLEAR LEUKOCYTES

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中国实验血液学杂志 1995年第4期3卷 355-363页

作者：董陆佳 John C Herion Richard i Walker 北京基础医学研究所北京100850 Professor of Medicine Division of Hematology Department of Medicine UNC School of Medicine USA

An extract (G-iNH) made from mature human granulocytes freshly isolated from normai blood causes human neutrophils to undergo apoptosis in vitro as shown by morphologic changes and by the typical ladder pattern of small DNA fragments noted on agarose gel electrophoresis of isolated DNA. Apoptosis occurs in from 20% to 30% of neutrophils over 24 hours of culture in vitro and the addition of G-iNH to the medium causes a dose-related increase in the incidence of apoptosis. Heating G-iNH at 60t for 30 minutes does not destroy its capacity to induce apoptosis but GM-CSF, G-CSF, and to a lesser extent iL-1β, antagonize this action. iL-3 does not diminish G-iNH induced apoptosis of neutrophils. Substances, released from, mature neutrophils may participate in regulating the survival of other neutrophils, particularly in sites where the cells are in close proximity as in the marrow. Self destruction of post-mitotic neutrophils in marrow may thus represent an-other level at which regulation of cell production

关键词： apoptosis polymorphonuclear leukocyte cytokine hematopoietic inhibitor

Analysis of Factors instigating Land Use Conflicts in Selected Forest Reserves of Ondo State, Nigeria

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作者： i·阿西莫夫(i Asimov)

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Journal of Environmental Protection 2019年第5期10卷 614-624页

作者： i. O. Azeez O. J. Aluko Department of Social and Environmental Forestry University of Ibadan Oyo State Nigeria Department of Agricultural Extension and Management Federal College of Forestry Forestry Research Institute of Nigeria Nigeria

Practice of agriculture and other none forestry uses in forest reserves often generates conflict owing to the former’s incompatibility with the latter. The need to identify the factors that triggers this conflict is germane to sustainable forest resources management. Thus, this paper report findings on various factors instigating land use conflicts in the high forest zone of Ondo state, Nigeria. idanre and Oluwa forest reserves in the state were purposively selected for the study. Household counting was carried out in order to obtain a population in each settlement using participatory rural appraisal (PRA) technique. Fifty percent sampling intensity of individuals in settlements within and around the sites was used to select a total of 302 respondents for the study. Primary data were collected using both interview schedule guide and focus group discussion. Means, frequency counts and percentages were employed for descriptive analysis while factor analysis was used to identify the various factors instigating land use conflicts. Majority of the respondents were male (80.8%), married (86.1%), Yorubas (69.9%), farmers (69.6%) with a mean age of 43 ± 7.9 years. Boundary dispute (= 2.60), Resource control conflict (= 2.31), inheritance conflict (= 2.11) as well as conflict between human/cultural and natural use (= 1.66) were the major types of conflicts identified in the study area. Four major factors that amplified the causes of land use conflicts in the forest reserves were: Cultural (settling land dispute cultural values between different ethnic group and access to land ownership);Economic (desperate for short term monetary gain , unpaid rent to landlords and unauthorised sale of common or collectively owned land);Social factors (increase in number of people and several people claiming the same land), and Political factors (breach of contract with government and changes in government policies on the use of forest).

关键词： Land Use Land Use Conflict Forest Reserve

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泵手册

泵手册

作者： i.J.·卡拉西克(i.J. Karasik)

Spatial distribution of malaria in Warri metropolis

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Open Journal of Epidemiology 2013年第3期3卷 118-124页

作者： S. i. Efe C. O. Ojoh Department of Geography and Regional Planning Delta State University Abraka Nigeria

This study examined the spatial distribution of malaria in Warri metropolis. To achieve this, data were generated from medical archival records from hospitals in Warri metropolis. The medical records contain recorded cases by place of diagnosis in 2011. The data were analysed by using ANOVA to ascertain the spatial differences in the spread of malaria in the metropolis. The result revealed that malaria is at its peak in June and minimal in September owing to the heavy floods in June. it was observed that there is a variation in the prevalence of malaria in the metropolis which is significantly high in area of Okumagba layout, Jakpa, Airport road, Pessu market, Warri main market, and igbudu market. However, the prevalence of malaria in Warri is significantly different from the prevalence of malaria in Uvwie and Udu. it is anticipated that an increase in malaria is attributed to water bodies, thus, it is recommended that vulnerability mapping should be carried out to identify areas prone to malaria.

关键词： Component Formatting Style Styling insert