应用皮肤光毒性实验仪进行化妆品皮肤光毒性试验的研究

[目的]探讨应用皮肤光毒性实验仪进行化妆品皮肤光毒性试验的试验条件和阳性对照物8-MOP的合适试验浓度。[方法]观测皮肤光毒性实验仪的UVA光强度与开机时间的关系,并根据测得的光强度平均值计算得出光毒性试验所需的照射时间;用不同浓度的8-MOP进行试验,排除8-MOP的原发性刺激作用,选择适宜的应用浓度进行皮肤光毒性试验;对两个防晒粉底按所选仪器条件进行试验。[结果]照射开始后2-100m in,UVA光强度稳定在4.3-4.4 mW/cm^2,平均值为4.4 mW/cm^2,故试验时的照射时间为38m in;用皮肤光毒性实验仪进行光毒性试验,0.05%8-MOP能引起豚鼠皮肤明显光毒性反应并且不引起原发性刺激反应;相同试验条件下未见两种防晒粉底引起豚鼠皮肤显著光毒性反应。[结论]用皮肤光毒性实验仪进行化妆品皮肤光毒性试验可行、有效。     

“2＋1”工学结合工作站管理顶岗实习“1”的模式初探——以常州机电职业技术学院“2＋1”工学结合为例

推行工学结合，加大高职大学生实习的力度，是贯彻国家教育方针、路线、政策的重要举措之一。常州机电职业技术学院实施“2＋1”工学结合工作站管理学生的顶岗实习，即承担三年制高职最后“1”的教学、教育、管理，作为一种模式，是一种探索，也是一种创新。     

钛合金TA1磨削温度的实验研究

钛合金已经广泛应用于航空航天、医疗等领域,近年钛合金管道也迅速发展。钛合金的应用离不开机械加工,尤其是精加工磨削。针对钛合金导热性差,粘性大的特点,进行了TA1钛合金的磨削加工测温实验,得到了合理的磨削加工工艺参数。     

《说文解字》八部字研究（上）

许慎在《说文解字》当中首创的汉字部首说是我国文字学研究的一个伟大创造,但他的部首说及其归部原则并不是无懈可击的真理。比如,《说文解字.八部》就是一个值得商榷的典型。我们充分利用目前所能见到的甲古文、金文、战国文字等文字形体重新审视了《说文解字.八部》诸字,发现许慎的八部归部存在一些不可忽视的偏差。即《说文解字.八部》内只有＂分＂,＂尒＂,＂曾＂,＂尚＂,＂＂,＂詹＂等字本义与八字本义联系紧密,可以入八部。     

Relationship between positive psychological capital and creative performance

Despite considerable attention to the creative process and its relationship with personal characteristics, there is no published study focused directly on the relationship between the recently recognized core construct of psychological capital (PsyCap) and creative performance. Drawing from a large (N = 899) and heterogeneous sample of working adults, this study investigates PsyCap and its components (i.e., efficacy, hope, optimism, and resilience) as predictors of creative performance. Overall PsyCap predicted creative performance over and above each of the four PsyCap components. Theoretical and practical implications of these findings are considered. Copyright © 2010 ASAC. Published by John Wiley & Sons, Ltd.     

WIC Participation and Relative Quality of Household Food Purchases: Evidence from FoodAPS

We examine the effect of the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) on the quality of household food purchases using the National Household Food Acquisition and Purchase Survey (FoodAPS) and propensity score matching. A healthy purchasing index (HPI) is used to measure nutritional quality of household food purchases. WIC foods explain the improvement in quality of food purchases, not self‐selection of more nutrition‐conscious households into the program. The improvement in purchase quality was driven entirely by WIC participating households who redeemed WIC foods during the interview week. There was no significant difference between WIC participants who did not redeem WIC foods and eligible nonparticipants. In this sample, there is no evidence that lack of access to clinics has adverse effects on participation nor is there evidence that HPI depends on supermarket access. A supervised machine learning process supports our main conclusion on the importance of WIC foods.     

Firm Heterogeneity and Export Pricing in India

We examine export pricing by Indian manufacturing firms in the early 2000s using a unique data set that matches firm characteristics with product and destination‐level trade data. We find that, in contrast to China and other countries, firm productivity is negatively associated with export prices, and export prices are negatively associated with distance while positively associated with remoteness. Our conjecture is that Indian innovation costs, which are higher than China's, drive down the scope for quality differentiation causing a negative association between productivity and prices. To the best of our knowledge, this is the first empirical evidence consistent with heterogenous goods and short quality ladders, a theoretical possibility noted in the study by Antoniades (2012), an outcome that arises here because of domestic Indian economic and regulatory features.     

什么样的数字创新生态系统能提高区域创新绩效——基于NCA与QCA的研究

什么样的数字创新生态系统有助于提高区域创新绩效是亟待解决的热点问题。采用必要条件分析（NCA）和模糊集定性比较分析（fsQCA）两种方法,对我国内地31个省（区、市）进行实证分析。研究发现：①数字企业、政府、高校及科研机构、数字创新基础设施、数字人才和金融服务是数字创新生态系统的关键构成,但单个要素并不是提高区域创新绩效的必要条件;②4种数字创新生态系统要素组态有助于提高区域创新绩效,构成的数字创新生态系统分别是政府引导的智力聚集型、企业开拓的环境支撑型、主体多元的综合发展型和企业主导的资本驱动型;③各地应因地制宜,选择合适的数字创新生态系统,培育区域创新新动能,助推“数字中国”新发展。     

东亚货币合作可行性的经济数据检验——基于OCA理论的分析

在最优货币区理论构筑的分析框架下,东亚区域在经济开放度、出口产品结构相似性、经济冲击对称性方面达到了OCA理论的标准,而在生产要素的流动性、金融市场一体化等方面距离最优货币区的标准尚有差距,但是这种差距正在缩小。通货膨胀相似性方面东亚整体虽未满足OCA标准的要求,但是有次区域已经符合这一标准。考虑到最优货币区标准的内生性,而且大量文献通过对东亚地区进行分组并采用不同的研究方法,证明东亚地区存在形成最优货币区的潜力,因而对次区域的货币合作可行性分析依然乐观。