SEVERAL CRITICAL POINTS ABOUT NEW RISK MEASUREMENT AND MANAGEMENT METHOD:MARK-TO-FUTURE

给出未来计值 (Mark- to- Future) ,这一建立在情景模拟 (scenarios)基础上的风险 /收益测量与管理方法的概念、模型、指标和实施步骤 ,重点讨论了其在实施和资本配置、业绩评价和组合优化应用中的几个核心问题。包括情景模拟方法 ,市场风险与信用风险的整合 ,风险的比较基准 (benchmark)与后悔值 ,经风险调整的估值以及看跌 /看涨有效前沿等As a new framework of integrated financial risk/reward measurement and management based on scenarios,Mark to Future(MtF) has earned a wide reputation.After introducing its concepts,models,criteria,and implementing steps,this paper focuses on several critical points in the implementation and application of MtF,which include scenarios simulation,integration of market risk and credit risk,risk benchmark and regret,and risk adjusted valuation.国家自然科学基金“九五”重大项目(7971 30 0 7);; 国泰君安证券研究所资助项

Promotional Effects of Ni and Mg on the Preferential Oxidation of CO over Carbon Nanotube-Supported Pt Catalyst

采用共浸渍法制备了nI和Mg促进的碳纳米管载PT催化剂(PT-nI-Mg/CnT),考察了其对CO优先氧化的催化性能.结果表明,PT,nI和Mg在CnT表面发生了相互作用,可能存在合金纳米粒子,从而显著改善了催化剂CO优先氧化的催化性能.添加适量nI可提高CO的转化率,而加入适量Mg则有助于改善CO2的选择性.当PT,nI和Mg同时负载时,优化后所得的催化剂5%PT-5%nI-5%Mg/CnT在100°C对富H2气体中CO选择氧化的转化率为100%,CO2的选择性为53.7%;该催化剂在140°C下连续反应24H,催化活性稳定.A carbon nanotube-supported Pt catalyst promoted by Ni and Mg(Pt-Ni-Mg/CNT) was prepared by the co-impregnation method for preferential oxidation of CO in H2-rich gas.The results of X-ray diffraction, H2 temperature-programmed reduction, transmission electron microscopy, and energy dispersive spectroscopy indicated that Pt interacted with Ni and Mg on CNT surface and might form alloy nanoparticles to some extents, which in turn markedly improved the catalytic performance of preferential oxidation of CO in H2-rich gas.The results of performance tests showed that CO conversion at low temperatures could be effectively enhanced by adding a proper amount of Ni, while the selectivity was improved by adding a proper amount of Mg.When Ni and Mg were added simultaneously, the 5%Pt-5%Ni-5%Mg/CNT catalyst showed CO conversion of 100% and selectivity for CO2 of 53.7% in a H2-rich stream at 100 °C.The catalytic performance did not change obviously during 24 h of run at 140 °C.国家重点基础研究发展计划(973计划;2009CB939804);福建省科技重大专项前期项目(2009HZ10102

Tannin dynamics of Kandelia candel roots in different salinity culture

对不同盐度(0‰-40‰)栽培下秋茄根的总酚、可溶性缩合单宁、结合缩合单宁、总缩合单宁的含量进行测定,探讨盐度对单宁生产的效应.结果表明:(1)不同盐度下栽培60-135d,总酚含量在相同盐度条件下随栽培时间的延长呈现出先波动而后升高的趋势,其中总酚最高含量出现在高盐度,说明一定的高盐度胁迫可以促进总酚的合成;总缩合单宁与可溶性缩合单宁含量变化趋势相似,其中可溶性缩合单宁含量显著高于结合缩合单宁.(2)在15‰盐度下栽培75-135d,秋茄根不同部位的总酚、可溶性缩合单宁、结合缩合单宁和总缩合单宁含量有相似的变化趋势,即由根尖往远离根尖的部位呈下降趋势.Total phenolics(TP),extractable condensed tannins(ECT),bound condensed tannins(BCT),and total condensed tannins(TCT) contents of Kandelia candel roots in different salinity culture were determined.In addition,the effect of salinity on tannin production was studied.The results showed as follows:(1) During the period of different salinity culture(from 60 d to 135 d),TP content fluctuated with increasing salinity,with the highest occurring in high salinity.ECT and TCT contents fluctuated under different salinity conditions with a consistent pattern.ECT contents were significantly higher than BCT contents.(2) At culture salinity of 15‰,the distribution of tannins in different parts of roots in the same period from 75 d to 135 d followed the identical pattern: the closer the root tip was,the higher the TP,ECT,BCT,and TCT contents were.福建省自然科学基金资助项目(B0410006);; 国家自然科学基金资助项目(40376026

国内首例宫颈癌自体卵巢组织冻存移植成功妊娠

目的探讨卵巢组织冻存及自体移植手术保护子宫颈癌患者生育力与卵巢内分泌功能的疗效。方法对1例26岁子宫颈癌ⅡA1期患者在癌症手术过程中进行卵巢组织取材、冻存，待其癌症完全缓解后进行冻存卵巢组织自体移植手术，随访监测患者的绝经相关症状、激素水平及卵泡发育情况。结果卵巢组织移植第6个月卵泡刺激素降低至6.60 U/L，雌二醇由＜10.00 ng/L升高至89.00 ng/L。移植第10个月，B超监测到移植卵巢组织有卵泡发育且能完成生理排卵功能。移植第15个月，卵泡刺激素维持在7.24 U/L，雌二醇水平升至368.00 ng/L。移植2年余，患者通过辅助生殖技术成功诞下了一名健康的婴儿。结论冻存卵巢组织移植后卵巢恢复内分泌功能及排卵功能，并成功妊娠，证明卵巢组织在临床上移植成功

Promotional Effects of Ni and Mg on the Preferential Oxidation of CO over Carbon Nanotube-Supported Pt Catalyst

A carbon nanotube-supported Pt catalyst promoted by Ni and Mg (Pt-Ni-Mg/CNT) was prepared by the co-impregnation method for preferential oxidation of CO in H-2-rich gas. The results of X-ray diffraction, H-2 temperature-programmed reduction, transmission electron microscopy, and energy dispersive spectroscopy indicated that Pt interacted with Ni and Mg on CNT surface and might form alloy nanoparticles to some extents, which in turn markedly improved the catalytic performance of preferential oxidation of CO in H-2-rich gas. The results of performance tests showed that CO conversion at low temperatures could be effectively enhanced by adding a proper amount of Ni, while the selectivity was improved by adding a proper amount of Mg. When Ni and Mg were added simultaneously, the 5%Pt-5%Ni-5%Mg/CNT catalyst showed CO conversion of 100% and selectivity for CO2 of 53.7% in a H-2-rich stream at 100 degrees C. The catalytic performance did not change obviously during 24 h of ran at 140 degrees C

类泛素蛋白及其中文命名

泛素家族包括泛素及类泛素蛋白,约20种成员蛋白.近年来,泛素家族领域取得了迅猛发展,并已与生物学及医学研究的各个领域相互交叉.泛素家族介导的蛋白质降解和细胞自噬机制的发现分别于2004和2016年获得诺贝尔奖.但是,类泛素蛋白并没有统一规范的中文译名. 2018年4月9日在苏州召开的《泛素家族介导的蛋白质降解和细胞自噬》专著的编委会上,部分作者讨论了类泛素蛋白的中文命名问题,并在随后的\"泛素家族、自噬与疾病\"(Ubiquitinfamily,autophagy anddiseases)苏州会议上提出了类泛素蛋白中文翻译草案,此草案在参加该会议的国内学者及海外华人学者间取得了高度共识.冷泉港亚洲\"泛素家族、自噬与疾病\"苏州会议是由美国冷泉港实验室主办、两年一度、面向全球的英文会议.该会议在海内外华人学者中具有广泛影响,因此,参会华人学者的意见具有一定的代表性.本文介绍了10个类别的类泛素蛋白的中文命名,系统总结了它们的结构特点,并比较了参与各种类泛素化修饰的酶和它们的生物学功能.文章由45名从事该领域研究的专家合作撰写,其中包括中国工程院院士1名,相关学者4名,长江学者3名,国家杰出青年科学基金获得者18名和美国知名高校华人教授4名.他们绝大多数是参加编写即将由科学出版社出版的专著《泛素家族介导的蛋白质降解和细胞自噬》的专家

Raman and AFM Characterization of Au and Cu Nanorod and Nanowire Arrays

通过电化学氧化法制备具有不同孔径氧化铝模板 ,利用交流电镀的方法在模板中沉积金属 ,再用酸溶解模板可以得到相应尺度的金属纳米线或纳米棒的阵列 .本文利用原子力显微镜和表面增强拉曼技术分别表征了金和铜两种金属纳米线阵列 .研究结果表明 ,作为探针分子的硫氰(SCN )在金属纳米线上的碳氮三键的振动频率随纳米线直径的增大而蓝移 .这一现象可能是因为尺寸效应对纳米线的费米能级造成影响 ,使不同直径的金属纳米线电子结构存在微小的差别 .Recently metal nanowires (nanorods) have aroused tremendous interest because of their novel properties and potential applications in wide fields [1] . Many two?dimensional nanowire arrays of semiconductors and metals with different diameter and length have been made by using template synthesis method. To characterize the novel optical, electronic and magnetic properties of these materials, UV?Vis and fluorescence spectroscopies are two of the most wildly used methods [2, 3] . Raman spectroscopy has, however, only been applied to the characterizing of semiconductor nanowires and carbon nanotubes [4,5] . Important and meaningful information can be obtained in these cases, as some forbidden Raman modes in the bulk materials become Raman active [4, 5] . Raman spectroscopy is apparently not suitable to study metal nanowires since it can only detect the mechanical vibration bands located in the extremely low frequency region. Consequently, an alternative way has to be established to study the metal nano?wires (?rods) with Raman spectroscopy. In the present work, we have taken the probe molecule strategy and used surface?enhanced Raman spectroscopy (SERS) to characterize metal nanorods (nanowires). It is well known that for a molecule which interacts strongly with a surface, its vibrational band frequency and shape are very sensitive to the electronic property, the chemical environment and the morphology of the surface. Hence Raman spectroscopy has long been used to analyze the atomic structures and the electronic properties of the surface indirectly through assessing carefully the spectral changes of the adsorbate known as a probe molecule. On that account, it is of great interest to diagnose the electronic structures of the metal nanorods with the vibrational spectrum of a probe molecule. We have examined the changes in the electronic properties of the nanorods through analyzing the spectral changes of the probe molecule. For this purpose a typical SERS molecule of SCN - was employed. The nanorod arrays of Au and Cu with different diameter from about 15 nm to 130 nm were fabricated electrochemically by means of the anodic aluminum oxide (AAO) templates. To partially expose metal nanowires with various lengths, the AAO template was chemically etched off to a certain extent by an aqueous solution of phosphoric acid or sodium hydroxide as shown in Fig. 1. After the template was etched off, the nanowires can be characterized by TEM, see Fig. 2. The tapping mode AFM image was obtained on a scanning probe microscope (Nanoscope IIIa). SERS measurements were performed on a confocal microprobe Raman system (LabRam I).作者联系地址：厦门大学固体表面物理化学国家重点实验室!化学系福建厦门361005,厦门大学固体表面物理化学国家重点实验室!化学系福建厦门361005,南京师范大学化学系!江苏南京,210097,厦门大学固体表面物理化学国家重点实验室!化学系福建厦门361005,厦门大学固体表面物理化学国家重点实验室!Author's Address: State Key Lab.for Phys.Chem.of Solid Surf.,Xiamen Univ.,Xiamen 361005, China; 1 Dept. of Chem., Nanjing Norm

集成产品开发 IPD 在课程设计中的应用研究

随着新经济的快速发展，行业边界越来越模糊，学生跨界知识学习能力、解决复杂工程问题的能力、项目管理能力 和经济决策能力都需要全面培养。IPD 模块式是企业解决跨界复杂工程问题的先进方法，在 RFID 与传感器技术课程实践教学 过程使用，通过校企双方的案例选择和教学内容设计，以及结构化流程的项目开发教学组织，在实践中取得了较好的成果。</jats:p

2-PrRS-PR（P）S并联变胞机构工作空间分析与优化

根据变胞理论，提出一种新型可变转动副轴线的2-PrRS-PR（P）S并联变胞机构，通过机构两个分支转动副轴线角度的改变实现机构变胞。首先，分析得出机构两个工作构态的运动学反解；其次，分析机构各参数对不同构态工作空间的限制，采用三维扫描法求解机构两个工作构态的工作空间；最后，研究机构各参数变化对机构不同构态工作空间体积大小的影响，以工作空间体积最大化为目标，利用遗传算法和单一变量法优化机构的结构参数