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1.
焦炉煤气还原硫酸钠制硫化钠的研究   总被引:3,自引:0,他引:3  
在固定床反应器内600~700℃的温度范围研究了焦炉煤气还原硫酸钠制硫化钠的反应速率和影响因素,在固定床内随着温度的提高,反应速率增大,并能达到较高的转化率.温度低于680℃,表现为催化反应,Fe2O3是活性较高的催化剂;在700℃以上表现为非催化反应。焦炉煤气中氢气的浓度和硫酸钠的颗粒直径对反应有一定的影响.在反应器内只要控制合适条件,往硫酸钠中加入脂肪酸的钠盐可以避免烧结,并能获得更高的反应速率。  相似文献   
2.
以现象学改造阳明心学,须坚持胡塞尔现象学回到“原初给予的直观”这一根本原则。此一原则在中国哲学中具体落实为以“本体”概念为核心的“原生现象”。一切在原生现象基础上流变而来次生现象,亦必须“还原”到原生现象这种“原初给予的直观”中予以重新理解。依此理解路径,阳明心学中“良知”的真实内涵也就须统摄于“本体”之中,而耿宁所并列划分的良知三义说亦需要进行重新理解与厘定。将良知第一义的“向善”禀赋与第二义的善恶分别意识还原收摄到“良知本体”中来,将经验意义上的良知现象学提升为先验意义上的良知现象学,不失为阳明学现象学化进程中的一条可能通道。  相似文献   
3.
在短短数十年中,数据库得到了广泛的认同,越来越多的领域要求建设符合使用需要的各类数据库。在文书相关领域,数据库建设也同样受到重视。此方面,徽州文书的研究者成为先行者,2007年,黄山学院启动名为《徽州文书整理及管理软件研究》的人文社科项目,将校内所存徽州文书建立特色文献数据  相似文献   
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5.
儒家思想在由非汉族统治全国的元朝依然能顺利传延,虽然儒家思想的内在性质非常重要,但如果忽视人在其中的因素,则无法对该问题完全解释。选取该时期著名的思想家郝经为研究对象,运用文本还原、历史逻辑相统一的研究方法,通过对郝经"能行中国之道,则中国之主"的深入分析,发现汉儒在少数民族优势地位下对中国文化的理解及其反应,郝经的"用夏变夷"思想及实践对于历史发展具有重要的推动作用。  相似文献   
6.
Despite the fact that sickle-cell disease (SCD) is perhaps the most “racialized” medical condition in the USA, very little is known about how “race” impacts public support for health policies related to the condition. We embedded an experiment within the 2011 Cooperative Congressional Election Study in order to assess perceptions about SCD among 1250 participants from diverse backgrounds and evaluate the extent to which these perceptions were associated with support for government spending on SCD-related benefits. We manipulated the racial phenotype of SCD advocates who requested additional government funding and asked participants to indicate how much the government should provide. Overall, participants expressed moderately positive attitudes about SCD, and there were no differences in funding support based on the race of the advocate. However, white participants supported less funding compared to nonwhite participants, even after adjusting for a number of demographic and attitudinal covariates. These findings suggest that a complex relationship between racial identification and implicit racism may shape public perceptions about SCD that negatively influences perceivers’ support for SCD-related policy.  相似文献   
7.
This study examined reciprocal support networks involving extended family, friends and church members among African Americans. Our analysis examined specific patterns of reciprocal support (i.e., received only, gave only, both gave and received, neither gave or received), as well as network characteristics (i.e., contact and subjective closeness) as correlates of reciprocal support. The analysis is based on the African American subsample of the National Survey of American Life. Overall, our findings indicate that African Americans are very involved in reciprocal support networks with their extended family, friends and church members. Respondents were most extensively involved in reciprocal supports with extended family members, followed closely by friends and church networks. Network characteristics (i.e., contact and subjective closeness) were significantly and consistently associated with involvement with reciprocal support exchanges for all three networks. These and other findings are discussed in detail. This study complements previous work on the complementary roles of family, friend and congregational support networks, as well as studies of racial differences in informal support networks.  相似文献   
8.
Using networks as prior knowledge to guide model selection is a way to reach structured sparsity. In particular, the fused lasso that was originally designed to penalize differences of coefficients corresponding to successive features has been generalized to handle features whose effects are structured according to a given network. As any prior information, the network provided in the penalty may contain misleading edges that connect coefficients whose difference is not zero, and the extent to which the performance of the method depend on the suitability of the graph has never been clearly assessed. In this work we investigate the theoretical and empirical properties of the adaptive generalized fused lasso in the context of generalized linear models. In the fixed \(p\) setting, we show that, asymptotically, adding misleading edges in the graph does not prevent the adaptive generalized fused lasso from enjoying asymptotic oracle properties, while forgetting suitable edges can be more problematic. These theoretical results are complemented by an extensive simulation study that assesses the robustness of the adaptive generalized fused lasso against misspecification of the network as well as its applicability when theoretical coefficients are not exactly equal. Our contribution is also to evaluate the applicability of the generalized fused lasso for the joint modeling of multiple sparse regression functions. Illustrations are provided on two real data examples.  相似文献   
9.
The article discusses the nature of the tangled interaction between the ex-Soviet Central Asian republics and the outside great powers – Russia, the United States and China. Although the so-called Great Game model is often used to explain the geopolitical rivalry in the region, the current pattern of relations between various international actors is much more complex than a traditional tug-of-war between the old colonial empires. While Russia's strategic role in Central Asia appears to be on the rise, the capacity of the West to influence political developments in the region has diminished. However, the overall situation in Central Asia remains volatile and its geopolitical landscape is far from being settled.  相似文献   
10.
婚嫁格局变动与乡村发展——以康村通婚圈为例   总被引:14,自引:1,他引:13  
农村经济体制改革后 ,康村的婚嫁距离急剧缩短 ,通婚区域快速内卷 ,通婚村减少 ,婚入与婚出出现了地域上的不对称性。形成这一局面的原因主要在于工业化、城镇化进程的不同速度打破了改革前的社会均质状态 ,引起了地区及村落发展的不平衡 ,而农村经营方式的转变和初级市场网络的复兴也对婚嫁格局、通婚距离及流向产生了一定影响。这种婚嫁格局的变动将造成婚入与婚出的失衡 ,危及人口素质的提高、村落的发展和人口结构的地域平衡  相似文献   
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