CuO/TiO2-Al2O3催化苯乙烯和重氮乙酸乙酯的环丙烷化反应

Cyclopropanes are extensively used as versatile intermediates in organic synthes is［1］. Various types of cyclopropanes exist in nature and many of them a re biologically active compounds［2,3］. The direct transfer of carbene fr om diazocompounds to olefins catalyzed by transition metals is the most straight forward route to synthesize cyclopropanes.     

Dipion decays of heavy baryons

Compared with the charmed baryons, the bottom baryons are not very well known, either experimentally or theoretically. In this paper, we investigate the dipion strong decays of the P-wave and D-wave excited bottom baryons in the framework of the QPC model. We also extend the same analysis to the charmed baryons.     

电子传输层PBD对Alq_3∶DCJTB电致发光器件的影响(英文)

以PBD为电子传输层制作了一组掺杂型有机电致发光器件,并研究了掺杂器件中PBD对器件的光谱、亮度等的影响。发现PBD与NPB和DCJTB分别掺杂的器件的光谱与其它的器件不同,然后运用了载流子的注入、传输及PBD的传输特性等方法对光谱做出了合理的解释,并运用高斯截谱的方法分析了各个发光峰的产生原因。     

Heteroclinic Orbit Existence on a Type of Chaotic System with Delays

In this paper, we discuss a type of chaotic system with delays. We study the equilibrium points and the existence of heteroclinic orbit of the system. Heteroclinic orbit existence theorem is proposed and proved by applying the undetermined coefficient method, which shows the complex dynamical properties of this system.     

Doubly charmed dibaryon states

In this work, we study the doubly charmed dibaryon states with the qqqqcc(q = u, d, s) configuration.The mass spectra of doubly charmed dibaryon states are obtained systematically within the chromomagnetic interaction model. In addition to the mass spectrum analysis, we illustrate their two-body strong decay behaviours. Our results suggest that there may be narrow states or even stable states that cannot decay through the strong interaction. We hope that our results will provide valuable informa...     

HL—2A装置LHCD的运行区域与驱动电流分布控制

本文利用低杂波电流驱动（LHCD）的理论和实验结果,讨论了电流驱动效率和电流分布控制与等离子体参量及入射波谱的关系,强调了波传播在确定功率沉积分布区域中的作用,并讨论了控制电流密度分布的方法,探索在HL－2A装置上实现中心负磁剪切位形的可能性。     

Dispersive Contribution of ρ(1450,1700) Decays and X(1576)

We study whether the broad enhancement X（1576） arises from the final state interaction （FSI） of p（1450, 1700）→p^＋ p^- →K^＋ K^-decay,Both the absorptive and dispersive contributions of the above amplitudes are considered since the intermediate states are very close to p（1450, 1700）. AThe same mechanism leads to a similar enhancement around 1580 MeV in the π^＋ π^- specturm in the J/ψ →π^0 π^＋ π^- channel, which can be used to test whether X（1576） can be ascribed to the FSI effect ofp（1450, 1700） → p^＋ p^-.     

ITER第一壁小模块的初步高热流实验

中国作为国际热核实验堆（ITER）计划的成员国之一，其中要承担的一项重要任务是第一壁板和屏蔽包层的制造，它是ITER的关键技术也可能是未来聚变堆的核心技术之一。由于ITER第一壁板，即Be／Cu／ss复合部件的重要性，ITER国际组要求每个成员国在承担制造任务之前必须通过资格论证。从2004年起，以核西物院牵头，联合国内有关的Be生产、加工和检测单位，如宁夏有色金属有限公司、中国工程物理研究院和中国核动力院等组成了联合攻关小组。