WO3改性方法对MnOx/TiO2催化剂低温催化NH3还原NO特性的影响（英文）

采用3种不同的浸渍过程制备了系列WO3改性MnOx/TiO2催化剂,并采用BET比表面积测试、X射线衍射、拉曼光谱、H2程序升温还原、高分辨扫描电镜和原位红外光谱等技术进行表征.结果显示,一步浸渍法和先钨后锰的分布浸渍法制备的催化剂中,Mn和W的协同作用提高了活性组分的分散状态,并阻止了钛载体的转晶;在所有的Mn基催化剂中,Mn物种主要以Mn2O3形式存在,但在15%MnOx-5%WO3/TiO2中出现了少量的MnO2;WO3的加入大大增强了催化剂的还原能力,提高了其表面酸位尤其是B酸的数量与强度,并促进了活性中间物(NH2)的生成.表面Lewis酸在低温SCR反应起主要作用,并且发现NH2也是活性很高的物种.在NH3低温催化还原NO的反应中,一步浸渍法制备的催化剂活性最高.     

AlGaInAs/InP coupled-circular microlasers

AlGaInAs/InP coupled-circular microlasers with radius of 10- and 2-μm width middle bus waveguide are fabricated by photolithography and inductively coupled plasma etching techniques. Room-temperature continuous-wave single-mode operation is realized with an output power of 0.17 mW and a side-mode suppression ratio of 23 dB at 45 mA. A longitudinal mode interval of 11 nm is obtained from the lasing spectra, and mode Q factor of 6.2×10 3 is estimated from 3-dB width of a minor peak near the threshold current. The mode characteristics are simulated by finite-difference time-domain technique for coupled- circular resonators. The results show that, in addition to the coupled modes, high-radial-order whispering gallery modes with travelling wave behaviors can also have high Q factors in the coupled-circular resonators with a middle bus waveguide.     

非有限阶化无中心Virasoro超代数的表示

介绍非有限阶化无中心Virasoro超代数的概念,并通过具体计算给出了非有限阶化无中心Virasoro超代数的一类中间序列模.     

城镇居民非参数消费敏感度模型及应用——基于局部线性工具变量估计方法

建立了城镇居民非参数消费敏感度模型,该模型不需做任何形式假设,避免了线性及非线性模型的误设.采用局部线性工具变量方法对其进行估计,结果表明城镇居民消费敏感度是时变的,和居民收入变动保持同步,支持流动性约束假说.另外高通货膨胀时的负实际利率变动比低利率、温和通胀时造成的负实际利率变动对消费支出的冲击要大得多.因此在增加城镇居民收入,突破流动性约束瓶颈的同时,高度关注通货膨胀,使得其消费水平得到真实提高.     

辛普生公式中间点的渐近性(英文)

辛普生公式是数值积分中的著名公式.利用泰勒公式,讨论了当区间的两个端点都趋于其内一定点时辛普生公式中间点的渐近性,得到了具有一般性的结果.     

多元积分中值定理的中间点(英文)

研究了多元球体上的积分中值定理的中间点的渐近性质,证明了当球体半径趋于0时,中间点近似落在过球体中心的切平面上.     

Two Novel Methods to Enhance Network Synchronizability

In this paper, we propose two methods to enhance the synchronizability of a class of complex networks which do not hold the positive correlation between betweenness centrality （BC） and degree of a node, and observe other topology characteristics of the network affected by the methods. Numerical simulations show that both methods can effectively enhance the synchronizability of this kind of networks. Furthermore, we show that the maximal BC of all edges is an important factor to affect the network synchronizability, although it is not the unique factor.     

SU（3） Simple Group Model and New Z＇ Properties in Future Linear Colliders

In the SU（3） simple group model, the new neutral gauge boson Z＇ couples to pairs of SM fermions with couplings fixed in terms of the SM gauge couplings and depending only on the choice of the fermion embedding. In this paper, we calculate the contributions of this new particle to the processes e^＋e^-→l^＋l^-, bb^-, and cc^- and study the possibility of detecting this new particle via these processes in the future high-energy linear e^＋e^- collider（LC） experiments with √s= 500 GeV and ￡int= 340 fb^-1. We find that the new gauge boson Z＇ is most sensitive to the process e^＋e^-→b^＋b^-. As long as Mz,≤2 TeV , the absolute values of the relative correction parameter are larger than 5%. We calculate the forward-backward asymmetries and left-right asymmetries for the process e^＋e^-→c^＋c^-, with both the universal and anomaly-free fermion embeddings. Bounds on Z＇ masses are also estimated within 95% confidence level.     

Heavy Charged Gauge Bosons with General CP Violating Couplings

Heavy gauge bosons such as W＇ are expected to exist in many extensions of the Standard Model. In this paper, the most general Lagrangian for the interaction of W＇ with top and bottom quarks is considered. This Lagrangian consists of V- A and V ＋ A structure with in general complex couplings. Such interactions produce an Electric Dipole Moment （EDM） for the top quark at one loop level. We predict the allowed ranges for the mass and couplings of W＇ by using the upper limit on the top quark EDM.     

Virasoro代数的不可分解模

证明了Virasoro代数的不可分解Harish-Chandra模一定是(ⅰ) 一致有界模, 或(ⅱ) 范畴O的模, 或(ⅲ) 范畴O-的模, 或(ⅳ)具有平凡模作为其复合因子的一类模.