Paleoenvironment and East Asian summer monsoon rainfall evolution in southern Taiwan during last deglaciation and early Holocene

末次冰消期一直以来是古气候研究的热点，这一时期地球气候系统发生了一系列剧烈的快速气候变化事件（H1冰阶-H1，Bølling-Allerød暖期-BA和新仙女木事件-YD），研究这些气候事件有助于我们认识全球气候系统的演变及其驱动机制。东亚季风是全球气候系统的重要一环，在全球和区域水汽循环中都扮演着重要作用。东亚季风的盛衰影响着东亚地区降水分布与生态环境演化，进而影响着季风区社会经济发展和文明演替。因此研究东亚季风的演化还具有重大的现实意义。 台湾位于东亚季风的前缘区，属于典型的季风气候，年均降水量约2000毫米，其中90%的降水主要集中5-9月份。此外，该地区常常遭遇台...The climate variability during the last deglaciation is one of the most intriguing areas of paleoclimate research due to a serial abrupt climatic oscillation (Heinrich stadial 1-H1, Bølling-Allerød-BA, and Younger Dryas event-YD). A better understanding of these events may advance our understanding of global climate system and its forcing. The East Asian summer monsoon (EASM) is an impor...学位：理学博士院系专业：海洋与地球学院_海洋化学学号：2232013015376

A Review on the Younger Dryas Event

发生在12.9~11.6 kA bP的一次北半球气候快速变冷——新仙女木(yd)事件在过去30年来一直是古气候研究的热点。当下由于人类活动引起全球变暖,研究类似的快速气候变化事件及其触发机制对于预测未来气候变化具有重要意义。然而时至今日,科学界对yd事件的发生时间、气候效应、触发机制及其全球性意义依然存在很大争议。对比多个高分辨率记录探讨了yd事件的发生时间及其年代学意义,详细总结了南、北半球中高纬地区及低纬地区近年来新发现的yd事件的记录及其气候效应,重点讨论了yd事件触发机制假说的发展与争议,并结合yd事件的研究现状提出了未来研究热点和重要方向。The Younger Dryas(YD) event which lasted from 12.9 ~ 11.6 ka BP is a rapid return to near-glacial conditions with a major impact on global climate that punctuated last glacial-Holocene transition period.The YD event was firstly found in records of mid-high latitude Northern Europe and North Atlantic vicinities and later identified broadly in North Pacific Oceans,Asia,North America,tropics and even in South Hemisphere.The mechanism of YD event is not clear although tremendous efforts have been paid over the past 30 years.Even the precise timing,duration and global impact remain ambiguous.The understanding of the magnitude of YD-like event in temporal and spatial scales andits forcing mechanism may help us to forecast the possible environmental and ecological impacts in global scale due to anthropogenic forcing.This article reviewed the progress of studies on the YD event,including the most recent dating of the onset and geographic pattern of climatic impacts,and particularly the triggering mechanisms proposed in recent years.The disparities of precise dates among records for the YD onset may result from counting mistakes,regional environmental responses and rapid fluctuation of atmospheric14 C.Globally,the YD event was characterized by abrupt climate change with increasing anomalies in magnitude toward the poles and opposite signs between Hemispheres,which modulated by bipolar seesaw mechanism.It is generally accepted that the YD event is caused by a slowdown Atlantic Meridional Overturning Circulation(AMOC).However,the triggering mechanism of this slowdown is debatable.Besides the earliest hypothesis of Lake Agassiz outburst,alternative mechanisms such as meltwater discharge into Arctic Ocean,extraterrestrial impact or atmospheric circulation forcing have been proposed under various supportive evidences.Tropical processwas suggested to play an additional role in abrupt climate change,of which high latitude was thought to be the modulator.The newest hypothesis suggested that YD event was an integral part of natural climate oscillation rather than a freak excursion.Finally,future directionstohave a complete understanding of the mechanisms of YD event are provided.国家自然科学基金项目重大研究计划“南海水体硝酸盐动力学与水团示踪”(编号:91328207);国家自然科学基金面上项目“中国边缘海沉积物氮同位素时空变化与控制因子”(编号:41176059)资

右半结肠癌外科干淋巴结转移及微转移的临床研究

目的探讨右半结肠外科干淋巴结清除的临床意义。方法对进展期右半结肠癌32例患者行外科干淋巴结清扫,并将所得淋巴结行常规病理染色检测及癌胚抗原(CEA)、上皮抗原(EMA)免疫组织化学(免疫组化)微转移检测。结果常规病理外科干淋巴结转移率9.4%(3/32)。CEA、EMA表达阳性率分别为31.2%(10/32)及37.5%(12/32),CEA和EMA联合检测阳性率46.9%(15/32)。DukesB、C期结肠癌淋巴结微转移率分别为29.4%(5/17)及66.7%(10/15),两者比较差异有统计学意义(P<0.05)。结论对进展期右半结肠癌外科干淋巴结行CEA、EMA免疫组化微转移检测,有利于更精确地了解淋巴结转移范围

Controlling Reversible Expansion of Li2O2 Formation and Decomposition by Modifying Electrolyte in Li-O2 Batteries

锂空电池分别使用空气中的氧气和金属锂作为正负极活性材料，具有极高的能量密度。但是，这一体系尚不能实现商业化的应用，其中一些关键问题未能解决。由于其正极活性材料是气体，使得电化学反应涉及气-液-固三相界面，电极过程十分复杂。与其它二次电池相比，空气电极需要考虑结构因素和催化因素。不仅要改善氧气电化学反应的动力学迟缓问题，还要考虑放电产物的驻留空间问题。董全峰教授课题组在前期开展了基于空气电极固相表面电催化研究，并结合电极结构方面的问题，构筑了有利于氧气发生反应的仿生开放式结构电极。 该研究工作主要由化学化工学院2015级iChEM直博生林晓东（第一作者）在董全峰教授、郑明森副教授和龚磊副教授的共同指导下完成，理论计算由袁汝明助理教授（共同第一作者）完成，曹勇、丁晓兵、蔡森荣、韩博闻等学生参与了部分工作。周志有教授和洪宇浩博士生在电化学微分质谱方面给予大力的帮助与支持。【Abstract】The aprotic lithium-oxygen (Li-O2) battery has attracted worldwide attention because of its ultrahigh theoretical energy density. However, its practical application is critically hindered by cathode passivation, large polarization, and severe parasitic reactions. Here, we demonstrate an originally designed Ru(Ⅱ) polypyridyl complex (RuPC) though which the reversible expansion of Li2O2 formation and decomposition can be achieved in Li-O2 batteries. Experimental and theoretical results revealed that the RuPC can not only expand the formation of Li2O2 in electrolyte but also suppress the reactivity of LiO2 intermediate during discharge, thus alleviating the cathode passivation and parasitic reactions significantly. In addition, an initial delithiation pathway can be achieved when charging in turn; thus, the Li2O2 products can be decomposed reversibly with a low overpotential. Consequently, the RuPC-catalyzed Li-O2 batteries exhibited a high discharge capacity, a low charge overpotential, and an ultralong cycle life. This work provides an alternative way of designing the soluble organic catalysts for metal-O2 batteries.This work was supported by the National 973 Program (2015CB251102), the Key Project of National Natural Science Foundation of China (21673196, 21621091, 21703186, 21773192),and the Fundamental Research Funds for the Central Universities (20720150042,20720150043). The authors thank Prof. Eric Meggers at Philipps-Univeristaet Marburg for his discussion about the synthesis of RuPC complex; Prof. Gang Fu at Xiamen University for his instructive discussions in DFT calculations; Lajia Yu and Dandan Tao at Xiamen University for their assistance in EPR experiments and UV-Vis spectroscopy experiments, respectively; and Yu Gu and Tao Wang at Xiamen University for their discussions in XPS results and CV data,respectively. 该工作得到科技部重大基础研究计划（项目批准号：2015CB251102）、国家自然科学基金（项目批准号：21673196、21621091、21703186、21773192）和中央高校基本科研业务费专项资金（项目批准号：20720150042、20720150043）的资助。 此外，感谢傅钢教授在理论计算方面的讨论和建议，Eric Meggers教授在配合物合成上的讨论，泉州师范学院吴启辉教授和化学化工学院谷宇博士生在X射线光电子能谱方面的帮助，于腊佳老师在电子顺磁共振实验上的帮助，陶丹丹博士生在紫外可见光谱测试上的帮助以及王韬博士生在循环伏安方面的讨论

Human Face Detection Based on Cluster Skin Color Model

在安全检测、人机交互等人脸识别应用中,人脸的检测与定位是前期重要工作.该文提出一种改进的基于亮度聚类的肤色模型,并提出一种新的最佳阈值选择算法,设计了肤色检测算法流程.实验证明该算法提高了人脸检测的速度和鲁棒性.Human face localization and detection is often the first step in applications such as video surveillance and human-computer interface.In this paper,a skin color model based on cluster and a novel selection method of best limitvalue is presented.An algorithmic flow for human face skin color detection is proposed.Examples are given to show the improved detection speed of the proposed algorithm and its robustness.国家自然科学基金资助项目(60605012

资源整合:建设机床产业链协作服务平台

支持机床制造业产业链协作的公共服务平台供销需求为牵引,实现以网络协作模式开展企业网络化销售管理系统、经销管理系统、服务管理系统以及企业采购管理等系统的应用实施,突破供销服务协作和帐表的信息化管理;有效地推动上游龙头企业信息化向企业间集成和电子商务方向发展,带动上下游中小企业实践信息化,形成机床制造业产业链信息化枢纽和协作服务平台

Fabrication and Application of Low-cost Microfluidic Analytical Devices Based on Paraffin-Heptane Treated Paper Substrate

介绍了一种新型的使用石蜡庚烷溶液制备纸基微流控分析装置的工艺,操作更加简单迅速,成本更加低廉。使用混合样品溶液进行测试,证明该装置可以完成对蛋白质、葡萄糖和PH值的同时检测,并可以用于定量分析。纸基微流控分析装置对样品检测的精度范围分别为:牛血清蛋白2.0x10-5~1.00x10-4MOl/l,葡萄糖0.02~0.1 MOl/l。并对加热处理过程中微流控通道壁的扩散现象进行了初步研究,发现加热前后通道壁厚度的变化呈线性规律。Paper is an ideal substrate material for low-cost diagnostic devices and shows a great potential in the fabrication of microfluidic paper-based analytical devices( μPADs).As one of the hot research fileds,a variety of materials and techniques have been proposed to fabricate μPADs.In this paper,we introduced a cheap,simpler and faster fabrication procedure,in which paraffin-heptane solution was used,toward this target.It is confirmed that as-developed protocol could be used for the simultaneous diagnostics of protein, glucose and pH.In addition,it is also applicable for quantitative analysis.The detection ranges of fabricated μPAD for bovine serum albumin and glucose were 2.0 × 10- 5~ 1.00 × 10- 4mol / L and 0.02 ~ 0.1 mol / L, respectively.This paper also preliminarily studied the spreading phenomena of microfluidic channel barrier during heating treatment.We found that the thickness of barrier followed a linear discipline.厦门大学化学化工学院和教育部博士点新教师基金项目(20120121120018); 国家自然科学基金(青年基金)项目(21205099)~

波状坡耕地工程减蚀技术设计与试验

为解决波状坡耕地水土流失的治理问题，针对波状坡耕地的形态特征及其水土流失特点，设计了波状坡耕 地拦挡淀排技术，并提出了相关参数计算方法。在河北省平泉县东北沟小流域布设径流小区 2个（对照小区和措 施小区）并观测产流产沙量。3年观测结果表明，波状坡耕地的土壤侵蚀主要是由几场强降雨引起的，拦挡淀排 措施在强降雨情况下的平均减蚀率仍能达到 98.37 %；通过对次降雨资料分析发现次降雨量是影响波状坡耕地侵 蚀的重要因子，经过拦挡淀排措施对径流的调控作用，措施小区径流量明显减少，措施小区径流量与次降雨量的 相关性系数减小；按照野外径流小区的实际修建费用估算出拦挡淀排技术的公顷造价为 30075元，仅为北方土石 山区石坎梯田公顷造价的 49.60 %，具有良好的经济适用性。因此，拦挡淀排技术能够有效防治波状坡耕地水土 流失，可作为一项新型坡耕地水土流失防治技术。</p

一种含Y的稀土永磁合金速凝片

本发明提供了一种含Y的稀土永磁合金速凝片，是在稀土合金Re‑Fe‑B中添加Y元素，采用合金速凝甩片技术，获得由主相柱状晶与晶间相构成的织构，其中Y主要进入主相中形成2:14:1晶体结构，而在富稀土相中形成贫Y区。该合金速凝片通过调控Y含量，能够有效调节稀土元素在速凝片中主相柱状晶和晶间相中的分布，为后续制备性能良好的稀土永磁体奠定了基础，并且能够降低后续制备磁体的成本