呼包鄂智慧城市群协调发展研究

智慧城市群的研究对于促进智慧城市建设、区域一体化发展具有重要的现实意义。呼包鄂城市群是内蒙古最具活力的经济圈,在内蒙古"一带一路"建设中处于重要地位。对智慧城市群相关文献进行综述,总结国内外智慧城市群建设经验,得出五条智慧城市群建设路径,并以呼包鄂三市为研究对象,运用熵值/TOPSIS法对呼包鄂智慧城市群建设水平进行评价,基于协调发展模型对其协调发展水平进行分析,最后对呼包鄂智慧城市群的协调发展提出三条建议。     

How well do conservation auctions perform in achieving landscape‐level outcomes? A comparison of auction formats and bid selection criteria

This paper studies the performance of auction design features regarding pricing mechanisms and bid selection criteria for securing wildlife zones across different holdings. We compare two pricing mechanisms: a discriminatory‐price auction and a uniform‐price ascending auction, and four bid selection criteria on the basis of: total bid, bid‐per‐value ratio, bid‐per‐area ratio and a mixed criterion where bids are formed on the basis of cost but they are selected based on the bid‐per‐value ratio. We develop a best‐response group‐bidding model for a discriminatory‐price auction where bidders form optimal group bids for individual wildlife zones. In the uniform‐price ascending auction, individual landholders respond to prices, which are successively raised by the auctioneer and whenever all the landholders from a single zone agree to participate (i.e. the first zone is formed), the auction stops. Based on numerical simulations using a bio‐economic model of malleefowl conservation, we observe that the discriminatory‐price auction is more cost‐effective than the uniform‐price ascending auction. However, the budgetary cost‐effectiveness of a discriminatory‐price auction is sensitive to bidder uncertainty about the number of competing bidder groups and the highest cost of establishing a wildlife zone among these groups. In terms of bid selection, the mixed bid selection criterion performs best. We discuss the policy implications of these findings.     

广义空间调制系统的正则化OMP检测算法

在广义空间调制（GSM）系统中,最大似然（ML）检测可以取得最优的检测性能,然而其计算复杂度随激活天线数的增加急剧增长。针对这一问题,提出了一种基于稀疏重构理论的低复杂度检测算法——正则化正交匹配追踪（ROMP）算法。该算法首先根据信道矩阵和当前残差的内积选取多个候选激活天线索引,接着对候选天线索引按正则化标准进行可靠性验证,剔除错误索引,缩小信号的搜索空间,最后通过求解最小二乘问题估计信号。仿真结果表明,与经典的正交匹配追踪（OMP）算法相比,所提算法以少许复杂度的增加为代价极大提升了检测性能,能够在检测性能与复杂度之间取得更好的折中。     

基于L频段数字航空通信系统1的F-OFDM波形设计

随着航空飞行器种类和数量的激增以及第五代（5G）移动通信系统和物联网（IoT）时代的到来,下一代航空无线通信系统面临着高安全性、大传输容量、低延时、强鲁棒性、高灵活性和综合业务提供等新的挑战。为此,提出了一种基于L频段数字航空通信系统1（L-DACS1）的滤波正交频分复用（F-OFDM）波形设计方法并探讨了可能的技术演进路径。首先引入了认知无线电、非连续载波干涉码OFDM和滤波器的思想,然后针对不同航空飞行器用户动态自适应配置波形参数。仿真结果表明,该方法得到的系统波形具有较低的带外辐射功率、优良的块误码率性能和较高的吞吐量增益。     

Brands as cultural resources in children’s peer culture

This article examines how children collectively appropriate brands as cultural resources. From the New Childhood Studies perspective, an ethnographic study was conducted in schools to investigate the engagement of 10- to 11-year-old children in brand culture. The findings demonstrate that, through a process similar to Corsaro’s model of interpretive reproduction, children do not simply reproduce brand culture; instead, they actively use branding to fuel their peer culture. Mastering and manipulating brands are thus sources for integration or exclusion within the peer group and for differentiation from the adult world. We show the paradoxical impacts of branding on children’s well-being and participate in the debate on their vulnerability to marketing by highlighting how they deploy brand culture to interact in their social spheres, with the consequence being that their would-be empowerment remains entangled in the “brandscape.” Last, we contribute to a better understanding of the concept of culturally based brand literacy.     

产业发展、城市集聚耦合与经济增长的关联度

产业集群与城市群的耦合关系是指产业集群与城市群这两个集群体系在经济发展过程中相互作用而彼此影响以至联合起来的非线性关系的总和。实证分析证明,产业和城市集聚的耦合优势将对地区经济增长产生一定的促进作用。随着经济的全球化和区域经济的一体化,产业集群和城市群的共同发展代表着未来经济社会发展的主流趋势,因此必须促进产业集群和城市群耦合的长远发展。     

Study on Problems of Group of Companies Listing as a Whole and Corporate Governance

Listing as a whole refers to reorganize all the enterprises＇ businesses, establish a stock corporation and increase capitals to list by issuing social public shares. TCL Group and Wuhan Iron and Steel （Group） Corporation have set a good example for other groups of enterprises that have parts of their assets listed, and will guide groups of enterprises which are affiliated to the center authority of China to list their assets. Listing as a whole, is beneficial to make clear the complex share-holding relationships between the group and its affiliates. It will also be beneficial to improve the whole structure of corporate governance, decrease the correlation trade, reduce the information disclosure cost, and solve the problem of the correlation trade between the group and its affiliates. However, it is far beyond the standard of what standardized corporate governance requires. Standardized corporate governance at least possesses two factors： One is the equality of the rights of shareholders, namely the same share with the same rights; the other is the clear rights boundary of the stakeholder and the existence of the efficient mechanism of equilibrium of rights. These two factors do not have the necessary relations to whether the group list as a whole or not, but depend on the maturity of the market and the soundness of the law and regulation.     

探析新课改背景下初中英语小组合作学习模式

在我国,传统的教学模式中学生学习英语的方式单一,只重视教师的传授,出现背语法知识,口语差等一系列现象,已不适应时代的发展。在新课改背景的要求下,小组合作学习模式便应运而生。分析初中英语小组合作学习的概念及内容,教师的角色,小组合作学习的特点,在小组合作学习中教师不再是知识传授者,应强调合作学习的重要性,及时评价,控制课堂节奏。     

基于流变—突变理论的城市突发事件群体心理发展规律研究

城市的发展离不开人,而城市突发事件的发生给城市公众造成了较大的心理影响,城市公众在产生巨大心理恐慌的同时,会对政府的执政能力产生怀疑,这对于城市的发展是极为不利的。为了避免城市突发事件下群体心理的形成,基于流变—突变理论,分析了城市突发事件下群体心理的发展规律,提出了避免群体心理形成的有效措施。研究结果表明：城市突发事件发生后,群体心理的形成遵循流变到突变的规律,政府通过及时有效的应急救援,并避免谣言与流言的传播,能够有效降低群体心理的形成,避免次生社会安全事件的发生。     

随机正交变换法在隐私保持关联规则挖掘中的应用

隐私保护是当前数据挖掘领域中一个十分重要的研究方向。本文针对关联规则挖掘中如何保持隐私的问题,采用一种不依赖具体数据的随机正交变换方法,从而解决了在数据集容量很大的情况下,运算量大的问题,并使用传统隐私保护度评价方法与正交变换的方向隐私保护度相结合的方法评价变换的隐私保护度,进而使得结果更符合实际情况。理论分析和论证表明本文中的方法具有很好的隐私性、高效性和适用性。