生物模板法合成三元硫化物及其抑菌活性

分别以橡胶乳、大豆粉、三七粉、菠菜提取物、苝醌提取物作为模板剂,采用溶剂热合成法,合成了具有不同形貌的三元硫化物,考察了其对枯草芽孢杆菌的抑菌活性性能,同时通过MTT法对三元硫化物材料进行毒性测试。通过XRD和SEM进行表征。结果表明：具有棒状结构的Bi₂S₃、雪花状的AgBiS₂、以及含有毛刺状小球的Cu₃BiS₃材料具有特殊的抑菌,且对正常细胞的毒性较低甚至没有。      

Schemes for Teleportation of an Unknown Single-Qubit Quantum State by Using an Arbitrary High-Dimensional Entangled State

We propose a scheme to teleport an unknown single-qubit state by using a high-dimensional entangled state as the quantum channel. As a special case, a scheme for teleportation of an unknown single-qubit state via three-dimensional entangled state is investigated in detail. Also, this scheme can be directly generalized to an unknown f-dimensional state by using a d-dimensional entangled state （d〉f） as the quantum channel.     

微分多项式f kQ [ f ]+P [ f ] 的零点分布——纪念李国平院士吴新谋教授诞辰100周年

该文讨论了亚纯函数及其微分多项式f ^kQ[ f ]+P[ f ]例外集理论的产生, 发展和最新进展,并且为下一步研究提出了建议.     

基于Markov过程的大学生就业移动预测模型

针对高职毕业生就业实际,分析了就业状态及其转移过程的马尔科夫性,依据转移矩阵建立了就业跟踪模型和时间效益模型,结合历年的就业实际对模型效果进行分析,给出加快就业转移速度的动态策略.     

The uniqueness of the solution to the diffusion equation with a damping term

Consider a non-linear diffusion equation with a damping term. If the diffusion coefficient is positive, then the solutions are not unique generally. However, if the diffusion coefficient degenerates, the situation may change. In this paper, not only the existence of the weak solution is established, but also the uniqueness of the weak solutions is proved, even the boundary value condition is not imposed. The conclusions imply that, on the boundary, the degeneracy of diffusion coefficient can eliminate the action from the damping term.     

电子商务与传统商务发展趋势的博弈分析

在消费者对商品价格与供货时间的偏好假设下,建立一个厂商关于电子商务与传统商务交易方式选择的完全信息静态博弈模型,其纳什均衡表明了电子商务与传统商务潜在的发展趋势,特别是两者可能的市场剖分关系.确切而言,若市场满足既定假设,均衡条件下的电子商务交易方式表现为较长的供货时间及低于传统商务约40%的市场交易价格,将获得三分之一的市场份额.     

以绕丹宁和噻唑烷-2,4-二酮为端基的不对称结构有机受体分子的设计合成与构性关系探讨

分别以绕丹宁和噻唑烷-2,4-二酮单元为端基、IDT为中心核设计合成了一个新型不对称结构的有机小分子受体IDT-2,并通过与两端均以绕丹宁或噻唑烷-2,4-二酮受体单元的对称小分子受体IDT-1和IDT-3进行对比,探讨了分子结构与性能之间的关系。研究发现,从IDT-1到IDT-3,随着两端的绕丹宁基团被噻唑烷-2,4-二酮基团逐步取代,这类小分子受体的吸收光谱显著蓝移,光学带隙E_g~(opt)逐步增大,LUMO和HOMO能级也逐渐抬升。随后我们分别以这三个小分子为受体、P3HT为给体共混构建活性层而制备了有机太阳能电池,结果表明,以两端均为绕丹宁单元的对称结构小分子受体IDT-1构建的电池器件具有最高的光电转换效率(PCE),相应的J_(sc)和FF值也最大,而V_(oc)则最低;而以两端均为噻唑烷-2,4-二酮基团的对称结构小分子受体IDT-3的电池器件,其V_(oc)最高,但其J_(sc)和FF则最低,PCE值也最小。对于IDT-2而言,由于分子只有一个绕丹宁单元被噻唑烷-2,4-二酮所取代,其V_(oc),J_(sc)和PCE均介于IDT-1与IDT-3之间。由此说明,尽管噻唑烷-2,4-二酮基团的引入能有效提升器件V_(oc),但却不利于改善其J_(sc)和FF,因此受体的分子设计中如何平衡电池器件的几种光伏性能参数而获得高的光电转换效率仍是十分重要的研究课题之一。     

"稀溶液的依数性"多维互动教学模式的探索

Colligative properties of dilute solutions are the basic contents for chemistry, chemical engineering and biomedicine majors. The teaching model of multidimensional interact takes teachers as the leader and students as the main body. Through the multi-dimensional interaction among teachers and students, students and groups, students' interest in learning, strong sense of cooperation and independent learning ability can be cultivated. This paper introduces the implementation process of the multi-dimensional interactive teaching mode of "colligative properties of dilute solutions", which includes clarifying the purpose of interaction, constructing learning groups, raising interactive questions, launching interactive activities and implementing interactive evaluation, etc. Multi-dimensional teaching goals can be achieved through group explorations, group presentations and group discussions.     

增加药学专业无机化学"药味"的思考与探索

无机化学是医学院校药学专业学生必修的专业基础课程。为了提高教学质量,增强学生的学习兴趣与专业素养,在药学专业无机化学教学中应强化与药学之间的紧密联系。文章结合教学实践,总结了增加药学专业无机化学"药味"的思考与探索。     

Configuration of the valence neutrons of 17B

The reaction cross section of ~(17)B on ~(12)C target at(43.7±2.4)MeV/u has been measured at the Radioactive Ion Beam Line in Lanzhou(RIBLL).The root-mean-square matter radius(R_(rms))was deduced to be(2.92±0.10)fm,while the R_(rms)of the core and the valence neutron distribution are 2.28 fm and 5.98 fm respectively.Assuming a"core plus 2n"structure in ~(17)B,the mixed configuration of(2s_(1/2))and(1d_(1/2))of the valence neutrons is studied and the s-wave spectroscopic factor is found to be(80±21)%.