Pulsar Spin—Down by ^3P2 superfluid Neutron with Field Decay

To describe pulsar spin-down,we present a simple combined torque model that takes into account both the standard magnetic dipole radiation and the electromagnetic radiation from the 3P2 superluid vortex neutrons inside neutron star.Using an ordinary exponential model for the magnetic field decay,we derive an analytical formulae for pulsar evolution tracks,The pulsar evolution on the P-P diagram is quite different from that of the standard magnetic dipole radiation model,especially when the superfluid torque or field decay becomes dominant.     

Fusion Reaction of ^16O＋^14N and Its Implication for the Production of ^26Al in Explosive Oxygen Burning

We suggest that the fusion reaction ^16O＋^14N may be a new way to produce ^26Al in interstellar medium. Adopting different mixing modes, we investigate the impact on the production of ^26Al in explosive oxygen burning and find that the result is extremely sensitive to mixing mechanisms. In some cases, we obtain an encouraging result, for example, the greatest final abundance of ^26Al reaches 7.779×10^-6, which means that the explosive oxygen burning may be a new origin of ^26 Al.     

A Hybrid Spin—Down Model and its Application to the Radio Quiet X—Ray Pulsar 1E 1207.4—5209

A series of newly published papers are focusing on the formation of the absorption features discovered by Chandra and XMM-Newton from the young radio quiet x-ray pulsar 1E 1207.4-5209.We try to interpret it as cyclotron absorption lines since this possibility could not be ruled out .With new development and application of a hybrid model.i.e.,the magnetic dipole spin-down model combined with the neutrino cyclotron radiation spin-down model.we can easily avoid the contradiction between the normal rotation energy loss rate and the relatively lower magnetic field,and then we obtain the possible initial spin period(-0.420s) .We suppose that the progenitor of 1E 1207.4-5209 may be a white dwarf.     

亳桑皮炮制工艺的优化

优选亳桑皮的最佳炮制工艺。以桑根酮C含量为指标,对亳桑皮干燥方法和蜜炙方法进行系统研究。分别于60℃烘干、晒干、阴干、霉变后60℃烘干4种不同干燥方法下对亳桑皮质量进行评价,结果表明,于60℃烘干的亳桑皮中桑根酮C含量最高,亳桑皮采收后应进行烘干处理;采用正交试验,确定亳桑皮的最佳炮制工艺:药材与蜜的比例为4∶1,闷润时间为20 min,在120～150℃温度下中火炒制15 min。采用高效液相色谱法测定所炮制的亳桑皮中桑根酮C的含量,桑根酮C含量在0.73～3.65μg范围内与色谱峰面积呈良好的线性关系,相关系数为0.999 9,方法的检出限为0.001 8 mg/mL。测定结果的相对标准偏差为1.47%(n=6),样品加标回收率为96.75%～100.03%。该工艺稳定可行,重现性好,可为亳桑皮的规范化生产提供科学理论依据。     

复合系统及其协调的一般理论

章给出了复合系统的定量描述,对复合系统及其协调机理进行了系统分析,并建立了复合系统协调管理的概念模型,该模型已用于经济-资源-环境复合系统的协调分析和设计中。     

Neutrino Lensing

Due to the intrinsic properties of neutrinos, the gravitational lens effect for a neutrino should be more colorful and meaningful than the normal lens effect of a photon. Other than the experiments operated at terrestrial laboratory, in principle, we can propose a completely new astrophysical method to determine not only the nature of the gravity of lens objects but also the mixing parameters of neutrinos by analyzing neutrino trajectories near the central objects. However, the angular, energy and time resolution of the neutrino telescopes are still comparatively poor, so we just concentrate on the two classical tests of general relativity, i.e. the angular deflection and the time delay of the neutrino by a lens object as a preparative work in this paper. In addition, some simple properties of neutrino lensing are investigated.     

直流辉光放电CVD法均匀生长纳米金刚石薄膜的研究

采用直流辉光放电化学气相沉积设备,以H2/CH4/Ar混合气体为工作气体,在2英寸硅片沉积出了晶粒尺寸为20～ 40 nm的纳米金刚石薄膜.采用SEM、Raman、微摩擦试验机等分析了不同CH4浓度、Ar浓度对NCD薄膜生长特性的影响.研究结果表明:金刚石薄膜的晶粒尺寸随着CH4浓度的增加而减小,但是过高的CH4浓度会导致石墨相大量生成;随着Ar浓度的增加,金刚石薄膜的晶粒尺寸逐渐细化,但过量Ar的掺入会降低金刚石薄膜的质量;在合适的工艺参数下,薄膜摩擦系数最低可以降低到0.12,NCD薄膜的最大沉积直径为140 mm.     

The Renormalized Equation of State and Quark Star

By means of the EOS of QCD at zero temperature and finite quark chemical potential we proposed [Phys. Rev. D 78 （2008） 054001] in the framework of rainbow-ladder approximation of Dyson-Schwinger approach, we investigate the structure of quark star and its property. It is found that the mass-radius relation in our model is very different from that of usual quark star models, but similar to neutron star models. The obtained mass of quark star is about 1.75M⊙- 2.2M⊙. The obtained radius of quark star is 22 - 26 km, which is obviously larger than the results in other models. The reason for this discrepancy is analyzed.     

塑造光流：光子学在天文中的应用

1608年，Hans Lippershey发明了望远镜，Galileo将其运用于天文观测中，由此开启了现代天文学的历史．今天的最大光学望远镜口径超过10m，10年之后，将会有多个新一代极大望远镜（ELTs）观测星空．望远镜收集的光束在会聚到望远镜焦庐之后，将重聚焦进入终端仪器进行数据分析和处理．     

热压烧结制备Al2O3/TiCN-0.2%Y2O3复合材料

采用热压烧结的方法制备Al2O3/TiCN-0.2%Y2O3复合陶瓷的结果, 较详细地介绍了试样成分、热压温度对试样抗弯强度、断裂韧性、维氏硬度等力学性能的影响. 结果表明 在热压温度低于1650 ℃时, 各项力学性能随着热压温度的提高而提高, 当热压温度为1650 ℃、压力为35 Mpa, 保温时间为30 min时, 其抗弯强度、断裂韧性及硬度分别达到它们的最大值1015 Mpa, 6.89 Mpa·m1/2和20.82 Mpa. 当热压温度高于1650 ℃时, 导致 TiCN分解作用加强导致密度下降, 同时温度过高导致晶粒长大使力学性能下降. 显微结构分析表明 由于稀土Y2O3的加入, 生成少量的YAG相, 抑制了Al2O3和TiCN晶粒长大, 有助于提高含Y2O3的Al2O3/TiCN复合材料的断裂韧性. TiCN颗粒弥散在Al2O3晶界处, 其晶粒尺寸在1 μm左右, 分布均匀, 相互交织, 抑制了晶粒生长, 从而起到增韧补强作用, 有利于材料力学性能的提高. 从压痕裂纹尖端扩展情况的扫描电镜照片可以看出 基体与增强相多个晶粒构成裂纹桥联行为, 并可能形成裂纹偏转、分支与桥联的共存区, 主要起作用的是稀土强化TiCN颗粒弥散增韧机制, 将复合材料的断裂韧性从5.94提高到6.89 Mpa·m1/2.