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河横村生态农业调查  [PDF]
农业环境科学学报 , 1984,
Abstract: 江苏太县沈高乡河横村位于里下河地区,有集体耕地2700亩,535户,2014人。1964年后粮棉产量稳步上升,生产持续发展,粮食单产由400斤上升到达双纲。特别是1979年以来,出现了亩产超吨粮和棉花过双百的高产稳产的新局面。集体分配的人均
水辅助注塑PP/SAN共混物制品中横晶形成机理的研究  [PDF]
汪斌,黄汉雄,汪志泳
高分子学报 , 2012, DOI: 10.3724/SP.J.1105.2012.11364
Abstract: 采用水辅助注塑(WAIM)设备,在不同的注水压力和熔体温度下制备了4种质量比(98/2,96/4,94/6和92/8)的聚丙烯/丙烯腈-苯乙烯共聚物(PP/SAN)共混物制品.采用偏光显微镜(POM)和扫描电子显微镜(SEM),研究了WAIMPP/SAN共混物制品的结晶形态和相形态.研究发现,高压水的穿透作用所引起的强剪切和快速冷却可诱导SAN在PP基体中原位成纤,并诱导PP在SAN纤维表面形成大量的晶核而最终形成横晶.SAN含量为4wt%时,所形成横晶的含量随水压的提高而增加,随温度的降低而大幅增加.当SAN含量较低(2wt%)时,制品中没有横晶形成.
宗族的现代国家改造与村庄治理――以南部G市郊区“横村”社区治理经验为例  [PDF]
王阳,刘炳辉
南京农业大学学报(社会科学版) , 2017,
Abstract: 宗族是中国乡村传统社会最为重要的组织基础,在中国村庄治理中一直扮演着十分重要的角色。近现代以来,国家权力在乡村社会得以全面渗透,并对传统的宗族进行了现代化改造,但由于区域环境的差异以及偶然性因素的叠加,却造成了宗族参与村庄治理的不同症候。总结宗族型村落治理的现实经验以及宗族与国家关系的演变,可以概括出宗族参与现代村庄治理的一个类型学谱系:宗族在现代国家改造过程中,国家治理的组织体系与意识形态嵌入村落传统治理结构的不同程度,是产生宗族型村落不同治理后果的重要原因。依据国家与宗族在治理结构上的“组织互嵌度”与“意识形态耦合度”,可以将现代宗族型村落概括为“博弈型宗族”“对抗型宗族”“边缘型宗族”“治理型宗族”。其中“治理型宗族”是宗族接受现代国家改造的一个理想类型。横村的社区治理经验说明了“治理型宗族”的产生过程及其对村庄治理的积极意义,也阐释了传统治理资源对于现代乡村社会重建的可能价值。
Clan is the most important organizational foundation in Chinese traditional rural society, which has been playing a very important role in the village governance of China. In modern times, the state power has fully penetrated into the rural community and modernized the traditional clan. However, differences in the regional environment and superposition of contingency factors result in different problems of claninvolved village governance. By summarizing the practical experience of clan-type village governance and the evolution of relations between clan and country, we can get a typology pedigree, which is in the transformation process of the modern state, the combination of different degrees between organizational and ideological system of governance and traditional village governance structure is an important reason for the appearance of different governance consequences. Based on the ‘mutual insertion of organizations’ and ‘coupling of ideology’ on the governance structure of clan and country, modern clan villages can be summed up as‘Game-Type Clan’, ‘Confrontation-Type Clan’, ‘Borderline Clan’ and ‘Governance Model Clan’, of which the ‘Governance Model Clan’ is an ideal type of modernized clan. The management experience of Village Heng demonstrates the production process of ‘Governance Model Clan’ and its positive significance for village governance. At the same time it also shows that traditional governance resources have potential value for the reconstruction of modern rural society
带传动设计的物元、物元变换及优度分析  [PDF]
林群,吴美娟
华东理工大学学报 , 1991,
Abstract: 利用物元分析理论,建立带传动设计问题可拓集合上的关联函数,提出了藉助于物元变换的新设计方法;规定了带传动设计的评价要素,并建立其相应的合格度、规范化合格度;利用合理的权因子分配方案,对解集作优度分析,以求获取最优设计方案。
基于树叶凋落物分解速率的溪流生态系统健康评价——以广东横石水河为例  [PDF]
迟国梁,赵颖,王建武,童晓立**
应用生态学报 , 2009,
Abstract: 用gessner等提出的树叶凋落物分解模式对横石水河的功能完整性和生态系统健康进行评价,对比了藜蒴和荷木2个树种的树叶凋落物在横石水河各污染样点和未受污染样点的分解速率.结果表明:藜蒴和荷木树叶凋落物在研究区污染样点的分解速率均显著低于清洁样点(p<0.05);根据gessner模式,各污染样点的环境得分均为0,而各清洁样点的环境得分均为2,表明横石水河污染河段的健康状态已受到严重破坏.研究区生态系统健康的生物学评价与水质分析结果一致,表明树叶凋落物分解模式是一个合适的评价河流状态的指数.
南秦岭横丹浊积岩系―晚古生代发育于扬子板块被动陆缘上的弧前盆地充填物  [PDF]
闫全人,A.D.Hanson
地质通报 , 2002,
Abstract: 南秦岭横丹浊积岩系是一套巨厚的浊流沉积,以向南或南东倾的单斜构造产出。由下而上,该沉积层序包括深水盆地、深水浊积扇和斜坡水道3个相序。相应地,沉积物粒度变粗,厚度变大,火山质组分含量增加,凝灰层大量发育,表明横丹浊积岩系为活动型浊积岩;其古水流方向为NNW-NNE向,物源区为南侧的碧口火山岩系。另外,横丹浊积岩系内还见石英岩、重结晶大理岩成分的砾石,说明其物源还包括被动陆缘环境的沉积物。相序、组构、沉积特征和物源区综合分析表明,横丹浊积岩系为弧前盆地充填物。构筑这一弧前盆地的动力学机制是洋壳板块向南俯冲于扬子板块被动陆缘之下,时代可能晚于中晚泥盆世。
横观各向同性土介质与结构物共同作用的有限元与边界元耦合分析  [PDF]
邓文龙,赵锡宏
工程力学 , 1996,
Abstract: 本文采用有限元与边界元耦合方法对上与结构物进行共同作用的分析。其中上部结构采用有限元子结构法,地基上考虑为横观各向同性特性,应用边界元法,通过基础界面上位移连续、面力平衡的条件进行耦合分析。编制了相应的计算程序,对某高层空间剪力培与地基的共同作用进行了计算,与有限元法和实测结果进行了对比分析,得到了满意的结果。说明:有限元和边界元的耦合方法能充分发挥两者的优越性,不失为共同作用分析的一种有效途径。
沾化凹陷三合村洼陷古近系沙三下亚段物源体系分析  [PDF]
王云鹤,刘强虎,朱筱敏,朱世发,,,耿名扬,蒋宇冰,张玉亮,,
- , 2015,
Abstract: 沾化凹陷三合村洼陷沙河街组沙三下亚段(Es3L)作为重要储集层段,勘探潜力巨大,精细刻画三合村洼陷沙三下亚 段物源体系对沉积体系重建、有利区带预测具重要意义。采用古地貌宏观区分物源区与沉积区,并精细刻画西南部与南部 物源通道(I~VI号),运用岩心、岩屑组成特征明确沉积区沉积相类型及原始物质成分,通过地震属性与地层切片精细描绘 沉积区内“源-汇”配置及时空演化关系,从不同角度、不同层次对三合村洼陷古物源体系进行综合刻画。结果表明,洼 陷西南部斜坡区(约3°)物源来自陈家庄凸起西段(I、II号沟槽输导),相对富砾,以碳酸盐岩岩屑为主;南部坡折区 (约8°)物源来自于陈家庄凸起东段(III~VI号沟谷输导),相对富砂,发育单晶石英或多晶石英颗粒。平面上,沉积区扇 三角洲沉积体系规模与物源通道的宽深比及延伸距离呈正相关,垂向上,低位体系域(LST)形成扇体规模远大于高位体 系域(HST)扇体,且交汇区物源体系由南部向西南部迁移转化。
Sanhecun Sub-sag in Zhanhua sag is an important target zone for future exploration due to its large sediment thickness, and low level of exploration in the lower third member of Shahejie Formation (Es3L). Detailed depiction of the provenance system using Es3L is of practical significance for reconstructing depositional system and forecasting favorable areas. This paper analyzes in detail the provenance system of Es3L in Sanhecun Sub-sag from various aspects and at different levels: the source area and the depositional area are macroscopically distinguished, while sediment transport pathways (valley I to VI) of the southwestern and southern are quantitatively described according to palaeogeomorphology; the types of sedimentary facies and prime material components in deposition area are identified based on cores and debris compositions; the sediment-dispersal patterns of “source-to-sink” systems and the spatial and temporal evolution of fans in the basin are finely pictured according to seismic profile analyses and stratal slices. The results show that of the southwestern gentle slope zone (about 3°) was originated from the western section of Chenjiazhuang Uplift (transport by valley I and II), which developed a gravel-rich fan delta and is mainly composed of carbonates debris; while of the southern slope break zone (about 8°) was originated from the eastern section of Chenjiazhuang Uplift (transport by valley III, IV, V and VI), which developed a sand-rich fan delta and contain quartz or crystal quartz grains. The scales of fan delta system in the deposition area have a positive correlation with the width-to-thickness ratios and the length of sediment transport pathway. The vertical changes show that the fan scale of lowstand system tracts (LST) of Es3L was larger than its highstand system tracts (HST), and the provenance system of convergence zone has transferred from the southern to the southwestern.
植物生长调节剂与矿质营养物在汕优63制种田上的应用  [PDF]
陈劲松,张家宏,陈伟民
南京农业大学学报 , 1993, DOI: 10.7685/j.issn.1000-2030.1993.03.021
Abstract: 因不育系珍汕97A的异交习性偏差,直接影响了杂交稻汕优63制种产量的提高。应用植物生长调节剂和矿质营养物,可改善不育系的异交习性,提高制种产量。本试验以汕优组合制种为对象,研究不同植物生调节剂及矿质营养物的综合效应,为其正确使用提供依据。
激光测试高温高压凝析油析蜡温度及其应用  [PDF]
刘建仪,赵志功,刘建华,王新裕,邓兴梁,李士伦,惠键
天然气工业 , 2004,
Abstract: ?针对柯深101井异常高温高压含蜡凝析气井出现石蜡堵塞现象,开展了室内实验和现场评价的研究。文章利用自行开发的固溶物沉积激光测试系统,测试了凝析气平衡油在不同压力下的析蜡温度。结果表明,凝析气平衡油液—固两相析蜡温度随压力下降而升高,压力越低析蜡温度上升越快,而且平衡油的析蜡规律与脱气油相反;该井凝析气中平衡油在压力60.00~0.10mpa的析蜡温度为27.7~38℃。研究得到的气—液—固三相相图表明,当温度低于液—固两相析蜡温度后,预测的气—液两相等液量线开始偏离正常,并快速上翘。利用析蜡实验数据预测出了析蜡位置,使得任何时候地层中都不会析蜡;在生产测试时,井筒中的蜡在距井口465m油管以上析出,预测结果与现场试验吻合。提高产量或加热、保温等措施,使井口流温高于38℃,井筒中不会析蜡;将分离器及其上游管线温度从32℃提高到36℃以上,可以防止凝析油在地面流动中析蜡。
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