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Search Results: 1 - 10 of 253007 matches for " 刘祖强 "
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唐仲冕和《嘉庆海州直隶州志》的编纂
Tang Zhongmian and the Compilation of Jiaqing Haizhou ZhiLi Zhouzhi


- , 2016,
Abstract: 乾嘉之际,在政府编纂《大清一统志》的推动下,全国各地兴起了编纂方志的高潮。《嘉庆海州直隶州志》就是在这种时代背景下应运而生。同时,乾嘉时期也是考据学的兴盛时期,这部方志不可避免地受到了这种风格的影响。而这也与主修唐仲冕的个人兴趣爱好有莫大的关系。从研究主修唐仲冕入手,深入探讨这部方志的编纂问题,以期窥一斑而见全豹对此时期的方志编纂情况作整体了解。
Under the promotion of the government to compile Da Qing Yi Tong Zhi, which formed the climax of compiling chronicles across the country,Jiaqing Haizhou Zlii Zhouzhi came into being in this background. At the same time, Qianjia is also the flourishing period of textual research, which inevitably affected the style of the chronicles. The book is closely related to personal interests of Tang Zhong-mian. In order to have a profound understanding of Fangzhi in this period, this article gives deep discussion on the issue of the local chronicles.
含油轴承非牛顿流体动力润滑理论的推导
,建华
南京工业大学学报(自然科学版) , 2001, DOI: 10.3969/j.issn.1671-7627.2001.02.017
Abstract: 选用幂指式流变模型τ=mγn作为非牛顿流体的本构方程。推导了描述多孔介质内渗流规律的变形达西公式及多孔质滑动轴承的变形雷诺方程。结果分析表明我们所得到的变形雷诺方程数学表达式具有普遍意义,从而为分析非牛顿流体润滑的含油轴承的润滑性能提供了理论分析基础。
非牛顿流体幂指式流变模型的实验验证
,建华
南京工业大学学报(自然科学版) , 2001, DOI: 10.3969/j.issn.1671-7627.2001.03.015
Abstract: 用30\+#机械油加聚异丁烯高分子添加剂构成非牛顿流体,选用幂指式流变模型作为这种流体的本构方程。并在改进的mpv-1500试验机上进行了这种非牛顿流体的流变性能试验。对于试验数据用幂指式(τ=m\+n)模型进行线性回归。8组数据处理得到的最小相关系数rh=0.9963,在0.01信度下是高度显著的。充分证明幂指式流变模型完全符合这种流体的本构方程。从而为这种非牛顿流体在摩擦学中的应用提供了理论分析基础。
变化环境下的佛山降雨趋势特征及影响因素分析
Characteristics and Influences of Precipitation Tendency in Foshan under Environmental Variations
 [PDF]

施宁宁, 嘉仪, 邝燕良, 周月英,,
Journal of Water Resources Research (JWRR) , 2014, DOI: 10.12677/JWRR.2014.31007
Abstract: 本文通过对佛山市5个区的主要雨量站在1956~2010年的降雨量数据,用泰森多边形法进行统计整理得出佛山市月降雨量。用一元线性回归法线性拟合月、季的降雨量变化特征,再通过滑动平均法和Mann-Kendall检验法分析佛山年降雨量在过去50多年间的变化趋势,并进行显著性及突变检验,得出佛山市降雨情况在1956~2010年呈上升趋势,在1997年发生降雨量上升的突变。结合气候环境的变化,认为佛山市年降雨量基本随年平均温度的升高而升高,与广东省温度变化正相关。此外,佛山市夏季降雨量的主要影响因素为人类活动造成的城市热岛效应,极端降雨量的年际变化尚未发现规律。
  Precipitation data of main precipitation stations of Foshan’s 5 zones during 1956-2010 are analyzed by Thiessen Polygons to explore the average monthly precipitation of Foshan. The method of linear regression is used to detect the variation characteristics of monthly and quarterly precipitation. The method of moving average and Mann-Kendall are used to explore the variation tendency, significance and mutation detection of Foshan’s precipitation during those 50 years. Combined with the variation of climatic environment, these conclusions are drawn: the precipitation of Foshan is getting higher during 1956-2010, and a mutation of rising was detected in 1997; Foshan’s annual average precipitation is positively correlated with the annual average temperature of Guangdong; the precipitation of summer is mainly controlled by urban heat island caused by human activities. No regular pattern is detected in annual variation of extreme precipitation.
“两硬”围岩孤岛工作面矿压显现规律研究
,成威
煤炭工程 , 2014, DOI: 10.11799/ce201410048
Abstract: 为了更好的对寺河二号井“两硬”围岩(即坚硬顶板和坚硬底板)地质条件下的工作面开采工作进行掌握和指导,采用相似模拟试验、现场监测相结合的方式,对寺河矿二号井IX4302孤岛工作面矿压显现规律进行了分析研究。研究结果表明,受“两硬”围岩和孤岛形态的双重影响,工作面周期来压明显,基本顶初次来压步距为45.7m,周期来压步距平均为16.4m,但动载系数普遍较小;超前支承压力峰值位置位于煤壁前方11m处,回采巷道变形较小,对类似条件工作面的安全高效回采提供了参考和指导。
市场环境下计及储能电站运行的联动电价研究及其效益分析
,王秀丽,
中国电机工程学报 , 2013,
Abstract: 在需求侧建立大规模电池储能系统,将成为解决电源、电网建设瓶颈及消纳新能源发电的理想途径。针对电力市场环境,建立了考虑发电侧、供电侧、大规模储能系统及用户响应的实时电价动态博弈联动模型。各参与方通过电价信号的传递不断修正自己的博弈策略直至均衡电价形成。设置了3种情形对模型进行仿真,通过各参与方的动态博弈,形成了实时电价。仿真结果表明,大规模储能电站的设置,降低了负荷峰谷差及各时段的电价差;发输电成本降低的同时,用户的平均电价也有所降低;储能电站分享发供电侧部分收益的同时提高了发输电设备的利用率,为发、供电侧带来了缓建效益。
反抗颓废——三位作家的西部民族民间信仰书写
徐兆寿,
民族文学研究 , 2015,
Abstract: 西部地区不同民族的民间信仰对于一些作家产生了极大影响。无论是本民族的作家,还是他民族的作家,在创作中对西部民族民间信仰书写最为重要的意义在于,将其作为一种现代文明背景下反抗颓废的方式。在这一点上,表现最为突出的作家是回族作家张承志和身处西部的汉族作家于坚、昌耀。
纤维素酶基因克隆及应用前景
,
中国生物工程杂志 , 1991,
Abstract: 纤维素占植物总干重的30%~50%,是地球上分布最广、含量最丰富的碳水化合物。据报道,全球每年通过光合作用产生的植物物质高达1.55×10~9吨,其中89%尚未被人类利用。我国纤维素资源也很丰富,仅农作物秸杆、皮壳一项,每年即可达数亿吨。纤维素的利用与转化对于解决前世界能源危机,粮食短缺、环境污染等问题具有重要意义。
实腹式型钢混凝土T形柱恢复力模型试验研究
Experimental Study on the Restoring Force Model of Solid-web Steel Reinforced Concrete T-shaped Column

,薛建阳,杨青峰
- , 2017, DOI: 10.7520/1001-4888-16-200
Abstract: 为研究实腹式型钢混凝土T形柱的力学性能,完成了5个试件的低周反复加载试验,获得了滞回曲线和骨架曲线,分析了轴压比和配钢率对承载力和变形性能的影响。结果表明:实腹式型钢混凝土T形柱滞回曲线饱满对称,延性好;轴压比增大,承载力变化较小,延性降低;配钢率增大,承载力和延性均提高。基于试验及理论分析,提出了实腹式型钢混凝土T形柱骨架曲线的屈服点、峰值点和破坏点特征值计算方法,进而建立了三折线恢复力模型,研究结果可为该类型结构的弹塑性地震反应分析提供依据。
In order to study the mechanical properties of solid-web steel reinforced concrete T-shaped column, low cycle repeated loading experiments were carried out for 5 specimens. Hysteretic curves and skeleton curves were obtained,and the effect of axial compression ratio and shaped steel ratio on bearing capacity and deformation performance was analyzed. Experimental results show that the hysteretic curves of solid-web steel reinforced concrete T-shaped column are plump and symmetrical,and the ductility is good. The ductility of the column decreases with the increase of axial compression ratio, however, the bearing capacity changes insignificantly. With the increase of steel ratio, both bearing capacity and ductility of the column increase. Based on experimental results and theoretical analysis, the calculation method of the characteristic value of the yield point, peak point and failure point at the skeleton curve of solid-web steel reinforced concrete T-shaped column was proposed, and then the trilinear restoring force model was established, which thereby provides a basis for the elasto-plastic seismic response analysis of steel reinforced concrete specially-shaped column structure
生孢噬纤维粘菌M229内切葡聚糖酶基因的克隆与表达
,高培基,
微生物学通报 , 1993,
Abstract: 生孢噬纤维粘菌(Sporocytophaga)M229可产内切葡聚糖酶(CMCase),外切葡聚糖酶(Avicelase)和β-葡萄糖苷酶(pNPGase)。以质粒pUC8为载体,采用CMC-刚果红法从M229中分离到了一个CMCase基因,导入E.coli JM83中后,其表达CMCase的活力为1.2×10-2mU/mgpr,最适作用pH和温度分别为6—7和40—50℃。限制性图谱及亚克隆分析暗示,该CMCase结构基因内部
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