冰雪体育文化产业链的发展现状探析

当前冰雪运动呈现出"大众化"特点,带动了冰雪体育文化产业链的发展。本文围绕冰雪体育文化产业链,针对我国现有的冰雪体育产业链定义及现状进行了阐述,并结合实际情况提出了符合我国冰雪体育现状的发展策略,希望形成优质冰雪体育文化产业链。     

Women investors, 'that nasty south sea affair' and the rage to speculate in early eighteenth-century England

The excursions of the five unmarried Hastings sisters and their widowed friend Jane Bonnell into the stock market show how changes in the availability of credit and the services offered by banks in the early eighteenth century had an impact on ordinary citizens. At the time of the South Sea Bubble all six bought South Sea shares through their bank. But their trading activities and investment strategies differed and had different outcomes, showing there are no easy associations between gender and ideas of risk or safe investment.     

供给存在季节性波动情况下的合作定价模型

供应链中季节性产品供求的不确定性,给供应链中各方的生产经营管理带来了一系列问题,也造成了很大的浪费。本文针对存在季节性波动的供求物品,分析供应双方合作以前的总成本和合作以后的总成本,指出在缺货成本和持有成本很高的情况下,合作后的总成本大于合作前的总成本,即合作可以节省成本,减少资源的浪费。于是提出了一种合作机制,让订货商提前订货,并且给供应商一个满意的协议价格,从而订货商可以消除供给的不确定性,使订货商的总成本变小,供应商的总收益变大。最终使订货商和供应商实现双赢。     

Trade-offs between conservation and socio-economic objectives in managing a tropical marine ecosystem

Understanding the trade-off relationships between ecological, economic and social objectives is important in designing policies to manage or restore ecosystems. Using the northern South China Sea (NSCS) as a case study, we explore the trade-offs between conservation and socio-economic objectives in managing fisheries in tropical marine ecosystems. Using a numerical optimization routine and ecosystem modelling (Ecopath with Ecosim), the study shows that current management of the NSCS is sub-optimal both in terms of conservation and economic objectives. Therefore, improvement in both conservation status and economic benefits can be achieved by reducing fishing capacity. However, the implementation of conservation plans may be hindered by the reduced number of fisheries-related jobs and the lack of alternative livelihoods. Similar trade-offs are apparent in many tropical marine ecosystems. Thus, this paper supports claims from previous studies that solving the alternative livelihood problems appears to be a priority for improving management and conservation in these ecosystems. A buy-back scheme that is funded by fishers might be effective in reducing fishing capacity. However, public funds are required if management objectives focus strongly on conservation. This might be justified by the direct or indirect benefits to society that could be provided by well-conserved ecosystems. This study highlights the conflict between maximizing conservation and social objectives, although win-win solutions between conservation and economic objectives may be possible.     

Liquefied Natural Gas in the Baltic Sea Region

This study analyzes the liquefied natural gas (LNG) terminal plans and their impact on gas supply in the Baltic Sea Region (BSR). Although the realized capacity of the planned terminals will be smaller than the planned one, these LNG terminals are strategic investments, as they will introduce competition that has a lowering impact on the price, and moreover, the terminals will improve the security of gas supply, though the BSR cannot build its gas supply on the LNG deliveries alone. In other words, the terminals will not replace Russia's deliveries but rather allow the countries in the eastern BSR to diversify a proportion of their gas supply.     

对于进一步完善环渤海区域合作机制的设想

本文在回顾环渤海区域合作发展历程的基础上,总结了区域合作取得的成绩,分析了目前存在的不足。为了更有效地开展环渤海区域合作,提升环渤海区域的整体竞争力,本文提出了完善的环渤海区域合作机制应该包括的主要内容。     

哈尔滨冰雪旅游市场发展态势研究

哈尔滨是我国冰雪旅游最有代表性的城市,而春节黄金周又是冰雪旅游最集中的时期。本文以近几年旅游政府部门发布数据为依据,对哈尔滨冰雪旅游市场的发展态势进行统计分析,并把哈尔滨与长春两个城市作了比较研究,并提出了市场发展的对策。     

海州湾近海海水、沉积物及贝类体内重金属的含量和分布特征

根据2008年海州湾海域环境调查资料,着重分析了海州湾近海海水、沉积物及贝类体内重金属的含量及分布。结果表明,海州湾海水中Pb、Cd、Cu、Zn的含量均低于第二类海水标准;Pb、Cd、Zn在临洪河口、堤北附近海域含量高于其他海区。各海区沉积物中Pb、Cd、Cu、Zn、Hg和As的含量都低于《海洋沉积物质量》第一类标准,质量良好。文中依据《无公害水产品安全要求》和《海洋生物质量》进行评价,海州湾沿海36份贝样中,Hg、As、Cu、Pb、Cd、Zn的残留量均有不同程度超标,以Cd、As含量超标较为严重,海州湾近海贝类质量状况并不乐观。临洪河口到港区段海水、沉积物和贝类体内重金属受外在因素影响,叠加作用较为明显。     

低密度格码在OFDM系统中的应用与性能仿真

信道编码是OFDM系统的关键技术之一,低密度格码（Low Density Lattice Codes, L DLC）则是一种能高效译码且达到AWGN信道容量的新型编码技术,它兼具格码和低密度奇偶 校验码（Low Density Parity Codes, LDPC）的特点。基于LDLC码编译码原理,给出了LDLC 码作为前向纠错编码技术应用于OFDM系统的方案,在MATLAB平台下仿真研究了LDLC-OFDM系 统 在Rayleigh衰落信道下的性能,结果表明LDLC码很大程度地改善了OFDM系统的误码率性能, 且优于LDPC码。     

数学仿真建模在生态环境实证研究中的应用——以舟山为例

随着工业化、城市化迅速发展,生活环境的日趋恶化,城市的严重污染, “掠夺式”开发与利用,人类活动的范围和程度超过了自然环境的承载力.保护生态环境已成为人们的一种追求.随着全球意识的加强,大气污染、海洋污染、城市污染等影响日益呈现国际化趋势,保护海洋、海岛环境问题已提到重要议事日程.本文以舟山为例,通过对环境的理想化建模和数据仿真,结合相关理论评价和分析舟山环境和环境污染现状,为舟山经济发展和环境保护提供了可借鉴的理论与实践.