Evaluation technique of the loss of coastal ecosystem services caused by sea reclamation project with three methods

在分析填海工程对海洋环境影响的基础上,结合《海洋生态资本评估技术导则》(gb/T 28058-2011)综合构建了填海工程对海洋生态系统服务功能损耗评估指标体系。分别采用价值评估法、能值分析法和物种丰度经验公式法对生态损耗进行价值评估,以福鼎市塔下新建填海工程为分析对象进行了实证评估,生态系统服务价值总损失量分别为672.0万元·年–1、809.2万元·年–1和133.3万元·年–1。通过与国内相关研究成果进行比较,分析三种评估方法的可行性和适用性,以期在实际环境影响评价工作中将工程外部成本纳入项目经济损益分析,为海岸带经济可持续发展提供技术支撑。Based on the effects of marine environment caused by sea reclamation and Technical Directives for Marine Ecological Capital Assessment(GB/T 28058-2011), the indexes of the losses of coastal ecosystem services caused by sea reclamation were built.The lost value of sea reclamation was calculated with three methods including economic evaluation, emergy analysis and biodiversity experiential formula which were applied in the new sea reclamation in Taxia Fuding Fujian Province separately, and the total ecosystem lost value was 672.0×104yuan·a–1, 809.2×104yuan·a–1, and 133.3×104yuan·a–1 correspondingly.Compared with other relevant researches, the methods are expected to apply in EIA economic evaluation in order to consider external cost and to apply in coastal economic sustainable development.海洋渔业安全环境保障服务系统关键技术研究及示范应用(201205006

SDN中基于PSVD的交换机迁移算法

针对软件定义网络中控制器管理的交换机流量分布不均衡问题,提出一种基于奇异值分解性能预测（PSVD）的交换机动态迁移算法。首先结合当前负载以及过去相似时刻的负载来预测未来时刻的控制器负载信息,然后将目前具有最大资源占用率的交换机迁移至低负载且未来时刻仍然处于低负载状态下的目标控制器。实验结果表明,该算法提高了控制器的资源利用率,实现了控制器的负载均衡,同时缩短了控制器的响应时间

InGaAs/InAlAs多量子阱电吸收光调制器

用国产MBE设备生长出与InP衬底晶格匹配的InGaAs/InAlAs多量子阱材料，并对材料的量子限制Stark效应及其与光偏振方向有关的各向异性电吸收特性进行研究。用该种材料制作的脊波导结构电吸收调制器在2.4V驱动电压下实现了20dB以上消光比，光3dB带宽达3GHz

近70年来中国自然地理与生存环境基础研究的重要进展与展望

自然环境是人类赖以生存和发展的基础,探索自然环境及其各要素(如地貌、气候、水文、土壤等)的特征、演变过程、地域分异规律以及驱动机制是自然地理学的重点研究内容.中国自然地理要素类型丰富且区域差异较大,为开展自然地理研究提供了难得的机遇.文章主要围绕青藏高原隆升与亚洲内陆干旱化及河流发育、高原冰冻圈环境演化、全新世多时间尺度季风与西风气候变化、湖泊与湿地、流域模型与土壤侵蚀、过去人-地关系演化、生物地理及中国三维地带性规律等几个方面,梳理了近70年来中国自然地理与生存环境研究的重大理论进展与重要贡献.在简要交代国际前沿研究进展的基础上,回顾并梳理了中国自然地理学各分支领域的研究脉络,进一步聚焦重大研究成果或具有较大争议、重大影响的学术争鸣问题,归纳目前研究现状,并进行未来工作展望.最后提出在推进生态文明建设的国家需求下,应发挥中国自然地理研究的优势,厘清自然地理要素变化的过程、规律与机制,持续推进中国自然地理研究为国家战略服务,在全球视野下做出具有中国特色的自然地理学理论贡献

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies