新疆塔里木河流域人口增长、水资源与沙漠化的关系

新疆塔里木河流域土地沙漠化的直接成因是干流和下游来水量的减少,而来水量的减少与上个流域段耕地面积的增加有密切关系。经过定性定量的分析,进一步发现在塔里木河这样典型的内陆河流域,人口增长对耕地面积(在干旱区流域基本等同于灌溉面积)不仅有密切的关系,而且不同的流域段人口增长对耕地增大的驱动效果也不同,人口增长的驱动对土地退化的影响具有从源流向下游的传递性,下游的土地沙化主要通过源流和上中游人口增长对下游来水量的影响传递产生。因此,治理下游严重的土地退化,控制源流和上中游的人口增长将比通过移民减少下游的人口更为重要。     

土地价格与农村土地流转的有效运作

阐述了研究土地价格的意义、制定土地价格的依据、我国农村土地的流转及其价格的计算方法。     

中国乡村旅游研究综述

乡村旅游是我国农村经济在新时期实现转型的重要途径之一.随着乡村旅游业的蓬勃发展,国内乡村旅游研究引起了政府部门和学者的广泛重视.通过对当前国内乡村旅游研究现状的梳理,从乡村旅游概念界定、乡村旅游发展模式、乡村旅游与农村社会经济发展、乡村旅游规划与设计和乡村旅游发展存在问题及负面效应等方面评述了我国乡村旅游研究进展及存在问题.     

数字音乐传播价值链分析

数字音乐是音乐与信息技术融合、与通信融合、与互联网融合以及与传媒融合的产物。文章以产业链和价值链理论为指导,通过对比传统音乐产业价值链与数字音乐产业价值链的构成,分析数字音乐产业价值链的特点和经济特性。发展融合型的数字音乐产业是中国音乐产业当前的战略选择。从产业价值链的角度对数字音乐产业价值链进行理论研究与总结,找出制约数字音乐产业良性发展的深层原因,将有利于中国音乐文化产业的进一步发展。     

多元化管理:大学生宿舍管理模式的新探索

学生宿舍是学生学习和生活的重要场所,也是校园精神文明建设的重要窗口。应抓好学生宿舍管理,从而发挥其育人功能。文中结合目前学生宿舍管理体制、管理方法的弊端,提出了多元化宿舍管理的新模式及其基本实现途径。     

建立中国(上海)自由贸易试验区动因及其经济效应分析

上海自贸试验区的建立,不是着眼于一城市、一区域的发展,而是力图通过开放转变政府角色、推动制度创新,突破金融领域的改革难点,从而带来"制度红利",充分运用市场调配资源的高效为我国社会主义建设事业服务。上海要实现建成金融中心、贸易中心的宏伟目标,必须从自贸试验区开始,从根本上摒除要素流动的障碍,协调好与经济腹地,与香港、深圳前海等区域的关系,实现区域经济协同发展。上海自贸试验区的建成,必将进一步推动上海服务业产业集聚,推动上海金融中心、航运中心、贸易中心更上一个能级,辐射长江流域甚至更广阔的地域。     

中国共产党青年工作的百年经验、时代任务与方法创新

建党百年来,我们党始终坚持马克思主义在青年工作中的指导地位、遵循党管青年原则、固守青年工作政治属性、照顾青年特点,并形成了关于青年具有自觉积极性、是社会发展生力军与需要被引导的科学认识,积累了丰富的青年工作有益经验——"四一、一三"经验。进入新时代,在党的青年工作具体使命任务逐渐转向引领青年服务乡村振兴新布局、帮助青年投身科技创新新领域、号召青年参与构建人类命运共同体、组织青年坚守意识形态新阵地和鼓励青年参与打造社会治理新格局的现实情况下,有必要创新"乡村‘X’+‘Y’""科技‘趣点’模拟+""关联性数字立体化+""积分式激励+""移动化新智能+"等五类青年工作法,以引领青年为实现社会主义现代化强国而努力奋斗。     

A quadratic time exact algorithm for continuous connected 2-facility location problem in trees

This paper studies the continuous connected 2-facility location problem (CC2FLP) in trees. Let \(T = (V, E, c, d, \ell , \mu )\) be an undirected rooted tree, where each node \(v \in V\) has a weight \(d(v) \ge 0\) denoting the demand amount of v as well as a weight \(\ell (v) \ge 0\) denoting the cost of opening a facility at v, and each edge \(e \in E\) has a weight \(c(e) \ge 0\) denoting the cost on e and is associated with a function \(\mu (e,t) \ge 0\) denoting the cost of opening a facility at a point x(e, t) on e where t is a continuous variable on e. Given a subset \(\mathcal {D} \subseteq V\) of clients, and a subset \(\mathcal {F} \subseteq \mathcal {P}(T)\) of continuum points admitting facilities where \(\mathcal {P}(T)\) is the set of all the points on edges of T, when two facilities are installed at a pair of continuum points \(x_1\) and \(x_2\) in \(\mathcal {F}\), the total cost involved in CC2FLP includes three parts: the cost of opening two facilities at \(x_1\) and \(x_2\), K times the cost of connecting \(x_1\) and \(x_2\), and the cost of all the clients in \(\mathcal {D}\) connecting to some facility. The objective is to open two facilities at a pair of continuum points in \(\mathcal {F}\) to minimize the total cost, for a given input parameter \(K \ge 1\). This paper focuses on the case of \(\mathcal {D} = V\) and \(\mathcal {F} = \mathcal {P}(T)\). We first study the discrete version of CC2FLP, named the discrete connected 2-facility location problem (DC2FLP), where two facilities are restricted to the nodes of T, and devise a quadratic time edge-splitting algorithm for DC2FLP. Furthermore, we prove that CC2FLP is almost equivalent to DC2FLP in trees, and develop a quadratic time exact algorithm based on the edge-splitting algorithm. Finally, we adapt our algorithms to the general case of \(\mathcal {D} \subseteq V\) and \(\mathcal {F} \subseteq \mathcal {P}(T)\).     

Family Characteristics and Mate Selection: Evidence From Computer‐Assisted Dating in Japan

Research on mate selection rarely considers singles' preferences for their future partners' family configurations and experiences. Using online dating records from a matchmaking agency in Japan, a society with a strong emphasis on family and kinship, we examine how singles' responses to date requests correspond to potential mates' family circumstances. Results showed that singles' preferences for potential partners' family characteristics stem from a concern about future obligations toward the partner's family and stereotypes associated with certain family traits. Singles are less likely to accept requests from those from large families, which are seen as traditional. Being from a large family, however, hampers individuals' dating chances more if they are firstborn and have no brothers, two conditions that make them the designated child to care for elderly parents. We also find that Japanese singles seek partners with more of the universally valued family traits rather than traits similar to their own.     

巫术、巫师和中国早期的巫文化

文化人类学中的巫师和巫术是中国早期巫文化的特殊表现形态。巫师是中国最早的知识分子,承担着重要的文化和政治职能。早期的政治领袖通常也是具有巫师本领的人。认识和理解巫术和巫师在中国早期文明中的发展及其作用,对于我们理解上古历史和文明发展的进程很有帮助。