基于随机p-鲁棒优化的国家血液战略储备库选址-库存模型

以往的救灾实践对建立国家血液战略储备体系提出了迫切要求。国家血液战略储备库的建设问题亟待解决。由于血液产品特性以及应急血液保障特性的存在，使得国家血液战略储备库的选址决策具有一定的复杂性。本文将问题定位为选址-库存问题。首先，以应急条件下血液保障及时度最高为目标，构建了一个不确定环境下考虑多情景、多血型、多阶段、带提前期、有容量限制、日常随机需求、有预算约束及协同定位的国家血液战略储备库选址-库存模型。同时，为了规避应急条件下的不确定风险，进一步构建了国家血液战略储备库选址-库存问题的随机p-鲁棒优化模型。该模型为离散非线性混合整数规划模型，难以快速精确求解。故基于模型性质，设计了相应的遗传算法。最后，设计了两组算例验证模型与算法的有效性。其中，第1组算例基于我国大陆地区31个省级血液中心与省级行政区的数据，并根据不同预算值给出6个算例，得到了国家血液战略储备库的选址-库存决策方案。第2组算例为6个不同规模的模拟算例，用来测试不同规模下的算法性能。算例结果表明：遗传算法的性能更好；鲁棒解与确定性模型最优值相差不大（最大差距≤1.08%），可降低不确定性导致的风险。实践中，可对本文所建模型稍作改进，应用于具有类似特征的易腐品（药品、粮食等）应急物资储备库选址-库存决策。     

Driven by Inequalities: Exploring the Resurgence of Domestic Work in U.S. Cities

Domestic work, once the most common occupation for women around the globe, was thought to be well on its way to extinction at the end of the twentieth century. However, in the 1980s and 1990s, evidence began to appear that domestic work was in many places again becoming a growth occupation. My goal in this article is to examine the factors related to the recent expansion of domestic work in countries in the Global North, using the United States as a case study. I draw on U.S. Census data to document the resurgence of domestic work both nationally and in many large cities across the country, and then use multivariate analysis to compare rates of domestic work across these cities. The results indicate that rates of domestic work are highly related to variables measuring structural inequalities (racialization of the labor force, immigration, and economic polarization), while showing little relationship with variables measuring unmet care needs (care dependency ratios, female/maternal labor force participation, and availability of institutional care options). These findings underline the urgency of providing protections to domestic workers and point to the need for scholarship that better theorizes the relationships among unpaid care and different forms of paid care.     

新冠疫情下停工期无薪休假制度探究

作为一种弹性工作方式,无薪休假通常运用于企业经营困难时期,以平衡劳资利益、稳定劳动关系,部分企业在此次新冠疫情停工期间进行了无薪休假的尝试。无薪休假具体表现为“缩短工时并相应地减少工资”,其在我国是一个新兴事物。若要引入“无薪休假”有必要厘清无薪休假实施的基础,考量我国引入无薪休假的必要性,并在考察域外无薪休假经验做法的基础上,结合实际情况构建我国无薪休假制度,重点在于劳资协商、最低工资保障与劳动监察等方面的规制。     

Unreasonable adjustments: the additional unpaid labour of academics with disabilities

Abstract

Two recent contributions to this section have drawn attention to the barriers which academics with disabilities have to navigate in academia where ableism “is endemic” (Brown and Leigh, 2018 Brown, N & Leigh, J (2018) Abelism in academia? Where are the disabled and ill academics. Disability & Society, 33 (6): 985–989.[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]: 4). Hannam-Swain (2018 Hannam-Swain, S (2018) The additional labour of a disabled PhD student. Disability & Society, 33 (1): 138–142.[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) highlighted the additional intellectual, emotional and physical labour required of her as a disabled PhD student, and Brown and Leigh (2018 Brown, N & Leigh, J (2018) Abelism in academia? Where are the disabled and ill academics. Disability & Society, 33 (6): 985–989.[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) queried “where are all the disabled and ill academics?” However, Brown and Leigh primarily focus on those with invisible “conditions” and the dilemmas raised by disclosure in a context where such conditions negate academic status and credibility. In contrast, since my “disability” is visible, I do not share the dilemma/“luxury” of secrecy. My presence announces my status before me, and this negates my personhood altogether in academic settings. It also places a burden of additional unpaid labour upon me which has significant mental health and career impacts as well as violating principles of equality.     

One million and counting: the hidden army of young carers in Canada

The term ‘young carer’ refers to those youth under the age of 25 years who provide substantial unpaid support to a family member due to factors including, but not limited to, familial or parental absence, disability, mental health issue(s) or problems with alcohol and/or other drugs. In the UK, national statistics have been integral to tracking the prevalence of young carers while serving as an important tool towards the development of (and justification for) a national legislative framework supporting these youth. In Canada, research and awareness for young carers remains in its infancy and available national datasets have yet to be examined in relation to youths providing unpaid caregiving. As a result, this research provides the first trend analysis of youth-based caregiving in Canada using census data for the 1996–2006 time-period. Methodological limitations of official statistics are also discussed in terms of conceptual and operational constraints limiting the full identification of all those potential young carers.     

综合性大学与医学类院校学生无偿献血的动因比较研究

以南京某综合性大学和某医学院校为例,比较两类学校学生在无偿献血认知、献血参与态度及献血动机方面的差异。通过文献研究、专家咨询及焦点小组评分编制调查问卷。认知差异比较采用卡方检验,态度和动机差异采用t检验。综合性大学学生对无偿献血的认知水平较低。医学类院校学生在献血参与态度方面的得分较高,二者在献血感受上无差异。献血动机方面,医学类院校学生献血的利他性得分较高,在两校暂未献血人群中,医学类院校学生自我效能型和献血奖励型动机得分更高。需加强对综合性大学学生献血知识的普及,根据态度及动机差异采取有针对性的献血宣传及招募。     

北欧各国配子捐赠制度及其对我国的启示

配子捐赠有助于不孕不育患者实现为人父母的美好愿望。而随之产生的一系列伦理法律问题仍有待探讨解决。匿名配子捐赠存废问题、卵子捐赠的可接受性问题和捐赠配子的补偿问题是北欧各国讨论中较突出的问题。北欧国家对这些问题做了大量研究,积累了丰富经验,并制定了法律法规。中国的配子银行建设仍在起步阶段,需要借鉴北欧经验,以便更好地满足配子捐赠的需要。     

Unaddressed problems and research perspectives in scheduling blood collection from donors

Many optimisation problems arise in managing the Blood Donation (BD) supply chain. Most of them have been addressed in the literature, while other problems, e.g. donation scheduling, have not been sufficiently addressed so far. However, blood collection from donors may have a disruptive impact on the entire BD supply chain if not properly managed. For example, scheduling donation appointments based on some system metrics may improve the flow of blood units through the BD supply chain and increase the quality of service perceived by donors. In this short communication, we present the donation scheduling problem and highlight the lack of work in the literature that deals with this problem. Then, we analyse the impact of an unbalanced flow of blood units on the BD system and the benefits that may derive from a suitable appointment scheduling. Finally, we propose suggestions for future research in BD collection scheduling that may improve the BD process.     

论血缘文化的锁定及其突破——中国传统伦理的近现代转换

血缘是中国文化的最本质要素,它建构、锁定了以家庭为核心,以"家国一体"为主要构架的中国伦理;在承载几千年的历史使命之后,在遭遇西方文明的碰撞之时,血缘文化及其建构的中国伦理在合法性上遭受了质疑;从过去的封建小农经济到今天的大工业社会,中国伦理的失范与重建成为一代代学人所共同关注的核心。