Taxonomy and geographical distribution of the Laboulbeniales in Asia

Thesis--University of Tsukuba, D.Sc.(B), no. 304, 1986. 3. 2

下腰部几种组织损伤的疼痛反应研究

腰痛常见,病因复杂。自1934年Mixter证实腰椎间盘突出引起腰痛后,(?)外越来越多的学者相信腰椎盘突出是腰痛的主要原因。国内对腰痛的病因说法颇多。为了探讨腰痛的原因,我们从1982年起进行了下腰部几种组织损伤的疼痛反应观察,现报告如下

泥河湾早更新世早期人类遗物和环境

在河北泥河湾盆地小长梁遗址东北约600 m处的马圈沟发现一新的哺乳动物化石和旧石器文化层,共采获500多件哺乳动物化石和5件旧石器.经研究有化石21种,其中Allophaiomys deucalion,Borsodia chinensis和Yangia tingi等的存在为年代的确定提供了重要依据.据哺乳动物化石对比分析,旧石器的年代早于1.8 Ma BP,可能达2.0 Ma BP,这是华北最早人类活动证据,当时人类生活于温带干旱稀树草原环境.国家“九五”攀登专项资助项目(95-专-1

试论我国个人所得税税制模式的选择

一、个人所得税的税制模式世界各国实行的个人所得税制度,大体上可分为三种模式:(一)分类所得税制(SCHEdulEdInCOMETAX)。又称为个别所得税制。是对同一纳税人不同类别的所得,分别按不同的税率分别征税,如对工资薪金等勤劳所得课以较轻的税,对营业利润、利息、租金、股息等资本所得课以较重的税。它的特征是只对税法上明确规定的所得分别课税,而不是将个人的总所得合并纳税,英国的“所得分类表制度”是分类所得税制的典范。分类所得税可以广泛采用源泉课征法,课征简便,节省征收费用,而且可按所得性质的不同采取差别率,有利于实现特定的政策目标。但它不能按纳税人全面的、真正的纳税能力征税,不太符合支付能力原则,比起“综合制”来说,更为原始一些,而且对实际执行中遇到的一系列概念性问题也缺乏较好的解决办法。所以,当今纯粹采用这种课征制度的国家不多

An automatic image registration method based on SIFT and Harris-Affine features matching

中文摘要: 针对大失配多传感器图像 ,提出了一种基于 SIFT ( scale invariant keypoint s)和 Harris-Affine ( H-A)互补不变特征匹配的自动配准算法.算法应用 SIFT 和 H-A 两种具有互补特性的局部不变特征 ,根据最近邻特征点距离与次近邻特征点距离之比确定初始匹配点对,然后利用马氏距离的仿射不变性删除误匹配特征点对 ,据此求取 2 幅源图像间的仿射变换参数.使用估计的变换矩阵把待配准图像上的所有点映射到参考图像,并对其进行重采样 ,实现图像的配准.实验结果表明:该算法能够快速高精度实现大失配图像的自动配准. 英文摘要：Abstract : An automatic image regist ration algorithm based on the complementary SIFT and Harris-Affine ( H-A) local invariant feat ures was proposed for large misalignment multi-sensor images. In this algorithm , SIFT features were complemented with H-A features and the ratio of the first and second nearest neighbor distance were used to set up the initial correspondences. The affine invariant of Mahalannobis distance was used to remove the mismatched feat ure points. With this correspondence of the points , the affine matrix between two different images could be determined. All points in the sensed image were mapped to the reference using the estimated transformation matrix and the corresponding gray level was assigned by resampling the image in the sensed image. Experiment s demonst rated the feasibility of this method.国家高技术研究发展计划资助项目 (2006AA01Z129) ; 国家重点基础研究发展计划资助项目(2007CB311005) ;河南省教育厅自然科学基础研究计划资助项目 (2007510023) ;985 工程二期科技创新 平台项目;福建省自然科学基金资助项目 (A0710020)

Effect of Loading Content of Silver on Lithium Storage for TiO2 Net-Work Flexible Film Electrode

采用水热法结合银镜反应制备出一系列不同Ag负载量(2.2%、4.0%、6.4%,; w/w)改性的3D纳米网状结构Ag@TiO_2薄膜电极。利用电感耦合等离子体技术(ICP)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(; TEM)和X射线能谱(EDX)等表征手段测试所合成材料的形貌及成分,实验结果表明Ag纳米颗粒可以成功沉积在TiO_2纳米线表面。电化学测试数据则; 表明,4.0%(w/w)负载量的Ag@TiO_2相比于未改性和其他负载量的TiO_2纳米线具有更好的倍率性能和更稳定的可逆容量。在50,100,; 200, 400, 800和1 200 mA·g~(-1)的电流密度条件下,该改性电极的放电容量可分别达到261.4,253.7,239.5,; 216.5, 193.1和185.1 mAh·g~(-1),在200 mA·g~(-1)下循环80次后容量保持率仍能达到99.8%。A series of silver-modified TiO(2)flexible film electrodes with hierarchical 3D nano-network structure are facilely synthesized using hydrothermal method followed via the traditional silver mirror reaction. Successful deposition of Ag nanoparticles on to the TiO2 nanowires surface is confirmed by inductively coupled plasma (ICP) technique, X-ray diffraction (XRD), scanning electron microscope (SEM) with energy-dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM). The electrochemical properties of the Ag@TiO2 nanowires were researched in this work. Our results show that the Ag@TiO2 nanowires with 4.0% (w/w) silver exhibits a better rate performance and more excellent reversibility than pristine one. At different current densities of 50, 100, 200, 400, 800 and 1 200 mA . g(-1), the discharge capacities of the Ag@TiO2 electrodes are 261.4, 253.7, 239.5, 216.5, 193.1 and 185.1 mAh . g(-1), respectively. After 80 cycles at 200 mA . g(-1), its discharge capacity retention is 99.8% indicating Ag@TiO(2)electrodes are potentially useful for LIBs.国家自然科学基金(N0.51604132）资助项目