On the asymptotic property of the transformed functions

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诗性传播：中国姓名的大众传播之道

姓名文化是中国文化的重要组成部分,是研究华夏传播的重要切入点。经研究发现,中国姓名在大众传播过程中,富有诗性特征。首先是编码往往与诗歌互化,其次是传播渠道往往借助诗歌,再次是传播者与受传者往往爱用诗歌,最后是反馈往往离不开诗歌。诗性传播可谓是华夏大众传播之道。国家社科基金一般项目“华夏文明传播的观念体系、理论体系与当代实践研究”（项目编号：19BXW056）的阶段性成

Wide-Range Tunable Dynamic Property of Carbon Nanotube-Based Fibers

Carbon nanotube (CNT) fiber is formed by assembling millions of individual tubes. The assembly feature provides the fiber with rich interface structures and thus various ways of energy dissipation, as reflected by the non-zero loss tangent (>0.028--0.045) at low vibration frequencies. A fiber containing entangled CNTs possesses higher loss tangents than a fiber spun from aligned CNTs. Liquid densification and polymer infiltration, the two common ways to increase the interfacial friction and thus the fiber's tensile strength and modulus, are found to efficiently reduce the damping coefficient. This is because the sliding tendency between CNT bundles can also be well suppressed by the high packing density and the formation of covalent polymer cross-links within the fiber. The CNT/bismaleimide composite fiber exhibited the smallest loss tangent, nearly as the same as that of carbon fibers. At a higher level of the assembly structure, namely a multi-ply CNT yarn, the inter-fiber friction and sliding tendency obviously influence the yarn's damping performance, and the loss tangent can be tuned within a wide range, as similar to carbon fibers, nylon yarns, or cotton yarns. The wide-range tunable dynamic properties allow new applications ranging from high quality factor materials to dissipative systems

制造业劳动报酬水平与产业竞争力变动趋势探析

本文通过计算单位产出劳动力成本(ulC)考察我国制造业劳动力成本的变化趋势,发现2009年我国制造业ulC甚至低于1999年;与我国fdI主要来源地、主要贸易伙伴国以及fdI、产品出口的主要竞争对手的比较发现:我国制造业ulC低于上述国家或地区,而且优势在进一步强化。通过计算我国制造业分行业的ulC,发现近十年来,约一半的劳动密集型制造业ulC正在上升,其余的劳动密集型制造业和大部分资本密集型制造业的uCl则在下降。然而,近十年来,由于劳动生产率的更快增长,随着劳动报酬的提高,制造业的企业利润在增长,企业利润率在提高,产品的国际贸易竞争力也进一步增强了。国家社科基金重大项目“扩大内需的宏观经济政策研究”(批准号08&ZD034)的阶段性研究成

三苯氧胺抗胆管癌机制的研究进展

胆管癌(cholangiocarcinoma,CCA)是一种来源于肝内或肝外胆管上皮细胞的恶性肿瘤.早期诊断困难,临床疗效差和5年生存率低等特点使之成为临床重点攻坚肿瘤.因此,需要研究和开发新型有效的化疗药物.三苯氧胺(tamoxifen,TAM)是一种非甾体类抗雌激素药物,临床上主要用于乳腺癌的治疗,对其他肿瘤包括CCA也有抑制活性,但具体机制尚不完全清楚.本文主要阐述TAM抗CCA机制的研究进展

Fatty acid composition of three species of marine microalgae during growth phases

球等鞭金藻、盐藻和小球藻脂肪酸组成气相色谱分析的结果表明 ,三种海洋微藻在指数生长期总多不饱和脂肪酸含量 (TPUFA)明显比稳定生长期高 ,而总饱和脂肪酸含量 (TSFA)在指数生长期间相对较低。球等鞭金藻的DHA ,小球藻的EPA和盐藻的C18∶3均在培养后的第 6d均达最大值。GC determination of fatty acid composition of Isochrysis galbana, Chlorella sp. and Dunaliella salina showed that TPUFA of the three species of microalgae in exponential phase were higher than those in stationary phase, otherwise, TSFA were relatively lower in exponential phase. DHA of Isochrysis galbana, EPA of Chlorella sp. and C18∶3 of Dunaliella salina were all the maximum at sixth day during cultural period.国家自然科学基金资助项目 (39870 5 6 5 ) ;; 福建省自然科学基金资助项目 (C970 0 6

Vibration Damping of Carbon Nanotube Assembly Materials

Vibration reduction is of great importance in various engineering applications, and a material that exhibits good vibration damping along with high strength and modulus has become more and more vital. Owing to the superior mechanical property of carbon nanotube (CNT), new types of vibration damping material can be developed. This paper presents recent advancements, including our progresses, in the development of high-damping macroscopic CNT assembly materials, such as forests, gels, films, and fibers. In these assemblies, structural deformation of CNTs, zipping and unzipping at CNT connection nodes, strengthening and welding of the nodes, and sliding between CNTs or CNT bundles are playing important roles in determining the viscoelasticity, and elasticity as well. Towards the damping enhancement, strategies for micro-structure and interface design are also discussed

环境因子对高盒形藻生长及其生化组成的影响

运用14C示踪法测定高盒形藻光合作用速率，并在实验室模拟条件下，研究光、营养盐和温度等环境因子对高盒形藻细胞生化组成的影响。结果表明，在常温和适宜的光照强度范围内，藻类光合作用速率随光强增加而增加，其光合产物碳水化合物和类脂物含量呈增加趋势，而蛋白质含量则降低。当介质氮磷比为16时，高盒形藻生长最佳，蛋白质合成的百分比最高。高盒形藻光合作用过程平均活化能14.32kJ/MOl，在27℃左右有最高光合作用速率和最高的碳水化合物与蛋白质含量之比。福建省自然科学基

阻断交感神经对青年和老龄小鼠小肠T淋巴细胞活性的影响

目的探究交感神经在青年和老龄小鼠中对小肠T淋巴细胞的免疫调控机制。方法选用健康的3月龄和18月龄的雄性昆明小鼠,腹腔注射六羟多巴胺,通过石蜡切片和HE染色观察上皮内淋巴细胞的数量,MTT法测定小肠T淋巴细胞的增殖,ELISA试剂盒测定小肠T淋巴细胞分泌IL-2、IL-4水平。结果阻断交感神经后,2个年龄组上皮内淋巴细胞数量均减少,老龄组尤为突出。青年小鼠T淋巴细胞增殖在处理后第5、10天出现下降,老龄小鼠在第3天至第15天均显著下降,其中第5天下降39.4%(P<0.01)。青年小鼠损毁交感神经后主要引起淋巴细胞分泌IL-4含量降低,而老龄小鼠主要引起IL-2降低。结论损毁交感神经可导致青年和老龄小鼠小肠T淋巴细胞活性下降,老龄组下降幅度大,恢复周期长