随机需求环境下联产品系统价格与产量决策研究

基于固定比例生产技术和多产品随机需求的情形,研究了联产品制造商的两阶段产量和价格联合优化模型。通过反向倒推的优化求解,得到了联产品制造商的最优产量和价格决策以及变化规律。同时研究了需求服从均匀分布时,需求波动对均衡的影响。研究结果表明,在订货成本较低和一种产品的需求波动性较大时,当另外一种产品的波动增大,则该产品的最优订货量增大,同时价格下降。借助数值仿真,分析了价格敏感度和产出比例对最优决策和利润的影响。结果表明,在给定一种产品的价格敏感度时,另外一种的价格敏感度越大,那么该产品的价格就越低,制造商的订货量就下降。当一种产品的产出比例固定时,另一种产品的产出比例上升时,则该产品的价格下降,制造商的订货量下降,总利润上升。     

论民族自治地方政府机构改革的深化——基于新中国成立初期探索的思考

民族自治地方政府在新一轮机构改革中进行了历史性变革和系统性重塑，然而顶层设计与分层对接机制优化、机构设置细化与整合、运转协同和效能提升仍未完全到位。回溯机构改革史，中华人民共和国成立初期作为政府顶层设计和系统性构建阶段，是民族自治地方政府机构建设最富成效的历史时期之一。这一时期的民族自治地方政府机构建设强调权能配置和人员构成的民族性，逐步差异化设置机构、探索单一制下政府机构平衡设置等历史经验，可以为进一步深化政府机构改革提供有益借鉴。在新的历史起点上深化民族自治地方政府机构改革应以新时代中国特色社会主义思想为引领，合理汲取历史养分，进一步深化理论研究，完善法制体系，明晰特殊性职权和民族性职能，健全顶层设计与分层对接机制，创新改革模式，强化地方参与性，切实破解改革难题，推动政府自身建设持续走向深入。     

中国特色社会主义制度自信：基本依据·价值意蕴·实现路径

中国特色社会主义制度是立足世情、国情、民情和党情建立起来的制度体系。从历史选择到制度实践构成了我们在新时代夯实制度自信的基本依据；从共同富裕到人的全面发展彰显了制度自信特有的价值意蕴。站在新的发展阶段，既需要大胆借鉴古今中外制度建设的有益成果，又务必坚持在实践基础上以理论创新推动制度创新，以制度借鉴、制度实践和制度创新进一步坚定制度自信。     

Defender–Attacker Games with Asymmetric Player Utilities

The presence of strategic attackers has become an important factor in the security and protection of systems, especially since the 9/11/2001 attacks, and considerable efforts have been dedicated to its study. When defending against the strategic attacker, many existing studies assume that the attacker would seek to minimize the defender's utility, which implies that the defender and attacker have symmetric utilities. However, the attacker's objective is determined by its own valuation of the system and target of the attack, which is not necessarily consistent with the defender's utility. If the attacker unexpectedly targets a different utility, then the defense strategy might no longer be optimal. In particular, the defense strategy could be inferior if the attacker's utility is not known to the defender. This study considers a situation where the defender's utility is the system survivability and the attacker's utility is the expected number of destroyed elements in the system. We investigate possible attack strategies under these two different utilities and compare (a) the conservative defense strategy when the attack utility is unknown to the defender with (b) the optimal defense strategy when the attack utility is known to the defender. We show that the conservative protection strategy is still optimal under asymmetric utilities when the contest intensity is smaller than one.     

农户地权诉求视角下农地制度的创新

目前我国农户的地权诉求已经发生了很大的变化，即由地权稳定、自主经营向农地资源的优化配置和高效利用转化。这一变化的内在动力是农户急切希望改变承包地过于细碎化以及改善农业生产经营基本条件。考察我国农地制度的发展史可以发现，我国农地制度变迁的基本逻辑就是农户的地权诉求决定农地制度的发展方向，这一点在当下一些地方的农地制度创新试验和经验中再次得到证明。今后我国农地制度创新必须遵循这一逻辑，根据我国农户地权诉求的变化，实施农户自愿前提下的承包地连片重划,争取国家对承包地重划制度的支持,强化农民集体民主决策制度,地方政府也要给予必要的支持。     

农民社会阶层越高越幸福吗?——基于CGSS 2010-2015年数据的微观分析

针对农民社会阶层与幸福感问题，通过分析2010-2015年“中国综合社会调查”数据，采用有序响应Logit模型估计，实证检验了农民社会阶层定位的幸福效应。研究发现，农民社会阶层定位存在幸福效应，社会阶层定位越高的农民，其幸福感越强；进一步区域比较发现，此幸福效应在经济发达地区最为显著；而户籍比较发现，农民社会阶层定位的幸福效应低于城镇居民；但从发展趋势来看，农民社会阶层定位的幸福效应较10年前有所增强，且农民对社会阶层定位有较为乐观的预期。据此提出，民生建设中重视农民的发展诉求和精神需求，融通农民社会阶层上升的渠道，从而提高农民幸福感，保障农民公平共享社会发展的成果。     

基于行为系统模型的农村中学英语教师专业发展策略研究

新的英语课程标准将“发展学生的英语学科核心素养”作为根本任务，这对英语教师的专业化水平提出了更高的要求。源于社会生态系统理论的行为系统模型，可为教师专业发展研究提供科学的思考框架。在深入分析行为系统模型的理论缘起、内涵结构基础上，全面梳理了现阶段农村中学英语教师专业发展状况以及存在的问题，从微系统、中系统、外系统、宏系统四个层次分别阐述了推动农村中学英语教师专业发展的策略，对保障英语课程标准的贯彻落实、中学英语教学质量的提升等具有一定的价值和意义。     

Im/mobile highly skilled migrants in Qatar*

Most studies on the mobility of highly skilled migrants have been examined with a framework of global talent mobility and under conditions of neoliberal governance and economic globalization. In this study we challenge the notion of the hypermobile knowledge worker. Utilizing mixed methods, we examine the factors that attracted highly skilled migrants to Qatar and the conditions under which they might leave in the future. Rather than finding a group of footloose migrants attracted primarily to high-wage jobs, a lack of taxation or amenities, and with multiple alternative locations of residence, we find that highly skilled migrants exist on a spectrum of immobility. More significantly, this immobility depends on the migrant’s region of origin. For Asian and Western migrants immobility is attributed to the Kafala system or employer sponsorship, which hinders occupational and spatial mobility and ties workers to their sponsors. Arab highly skilled migrants are especially affected by lack of security and stability in their home countries, which makes these workers involuntarily immobile. The former group seem to be willing to accept a reduced level of agency and mobility for high income, whereas for the latter security and stability are more fundamental to their decision to come to Qatar.     

‘Unfit for reform or punishment’: mental disorder and discipline in Liverpool Borough Prison in the late nineteenth century

This article examines how Liverpool Borough Prison, opened in 1855 as one of the largest local prisons in England to adopt the separate system, categorized and dealt with mental distress and disorder amongst its prison population in the late nineteenth century. High prison committal rates in Liverpool, alongside high levels of recidivism, especially among female prisoners, led to severe overcrowding and encouraged a harsh disciplinary regime. Exacerbated by the poor physical and mental condition of the prisoners, this produced a challenging environment for maintaining the separate system of confinement and prisoners’ mental well-being. While official figures for the rates of mental disorder in local prisons are not readily available, Liverpool Prison’s diverse and under-exploited archives and official reports indicate that insanity caused prison officials and visiting justices great concern, and many prisoners were declared unfit for the rigours of prison discipline. Our article explores the implications of the ever more punitive, deterrent and physically taxing penal policy implemented in the late nineteenth century on the minds of prisoners. Despite the heavy toll on prisoners’ mental well-being, such cases were often retained by prison medical officers reluctant to acknowledge the failure of the prison to deter, reform and redeem.     

基于多目标加权灰靶决策模型的节能服务公司选择研究

用能方对节能服务公司（Energy Service Company，ESCO）的选择关系到合同能源管理（Energy Performance Contracting，EPC）能否顺利实施。从用能方的角度，采用灰色系统理论中的多目标加权灰靶决策模型，对存在多决策目标的ESCO选择问题进行研究。通过层次分析法确定ESCO的11个决策目标的决策权数，根据综合效果测度值的比较，最终实现最优对策的选择。本文为用能方的ESCO选择问题提供了一种新的思路。