Phase Synchronization in Electrically Coupled Different Neuronal Pacemakers with the Chay Model

We study the phase synchronization in different electrically coupled neuronal pacemakers with the Chay model. The numerical simulation results and the definition of the mean frequency show that phase synchronization is equal to the mean frequency locking. Nearly complete synchronization of different two coupled neuronal pacemakers is also investigated. It is shown that the cross-correlation of the membrane potential variables is suitable to judge the nearly complete synchronization.     

注浆覆岩离层力学机理及其离层发育分类研究

依据覆岩离层生成的力学机理,结合煤层开采程度的不同,将可注浆层位的离层划分为三类.以岩石的应变为指标,确立了覆岩离层可注浆层位岩梁的断裂步距表达式,理论上证明了划分注浆层位的合理性.根据岩石的全应力应变试验,结合现场实际观测数据,对以应变为指标的岩梁断裂步距表达式做了初步验证.结果表明:可注浆层位的分类和断裂步距表达式的确定对注浆减沉工程具有指导意义.     

多值渐近φ-半压缩型映象三步迭代集合序列的强收敛性

利用新的分析方法,在任意实Banach空间中证明了具(随机性)误差的三步迭代集合序列强收敛于多值渐近Φ-半压缩型映象的不动点集．得到一些新的结论．     

有限步扩散反应置限分形聚集

综合考虑扩散粒子浓度n、粒子扩散限制范围Δ、扩散粒子与种粒子或团簇相遇时，反应概率P及粒子扩散步数W的影响，提出了有限步扩散反应置限聚集的分形生长模型，模拟得到一系列典型的聚集生长图形，计算了相应的分形维数.结果表明，在粒子浓度n较小时，呈离散团簇状生长；而在粒子浓度较大时，则随反应概率P或粒子扩散步数W的增大，从离散团簇状生长转变为连续枝叉状生长. 关键词：     

Highly Effective Phenol Hydroxylation over Ti-ZSM-5 Catalyst Prepared Using B-ZSM-5 as Precursor 以B-ZSM-5为母体合成Ti-ZSM-5高效苯酚羟基化催化剂

 以改进方法合成的B-ZSM-5为母体,采用气固相同晶取代法合成了较小晶粒的Ti-ZSM-5分子筛. 考察了样品的物化性能和催化苯酚羟基化性能. 结果表明: 所合成的小晶粒Ti-ZSM-5具有较高的结晶度,尺寸为100~200 nm,且不含锐钛矿型TiO2,对苯酚羟基化反应的催化性能优异.     

安培检测芯片毛细管电泳及其初步应用

An end-channel amperometric detector with a guide tube for working electrode was designed and integrated on a home-made glass microchip. The guide tube was directly patterned and fabricated at the end of the detection reservoir, which made the fixation and alignment of working electrode relatively easy. The fabrication was carried out in a two-step etching process. A 30 μm carbon fiber microdisk electrode and Pt cathode were also integrated onto the amperometric detector. The baseline separation of dopamine (DA), catechol (CA) and epinephrine (EP) was achieved within 80 s. Relative standard deviations of not more than 5.2% were obtained for both peak currents and migration times of DA and CA (n=5). Using standard adding method, DA in tLrine and plasma samples was detected. The recoveries were in the range of 83%—103%.     

研究型教学的新方法——U型7步探究法

受私董会U型7步研讨法的启发，提出了可用于研究型教与学的一种新方法：U型7步探究法。"U型"即探究问题有一个先下沉寻找本质再使问题清晰的过程，躬问、探究等7步为具体操作流程，由教练引导，案主为主，全员受益。还以一次成功的运作实例对方法进行了详细说明。     

多步法制备纳米钛酸钡

采用醋酸钡、碳酸钾、钛酸丁酯等为初始反应物，通过多步反应的方法，制得了纳米钛酸钡。所得产品采用XRD、TEM和SEM等进行了表征，并对生长机理进行了分析。研究结果表明，得到的碳酸钡为直径约100 nm的纳米棒，再经室温下钛酸丁酯水解产生二氧化钛对碳酸钡纳米棒进行包覆，可得到一维核-壳结构的碳酸钡/二氧化钛，最后于700 ℃下经固相反应而得到钛酸钡的纳米颗粒。这种制备纳米钛酸钡的方法可以有效地控制产品形貌及粒径。     

碲氢化钠存在下3—氧化硫代羧酸酯的一步合成法

３－氧代硫代羧酸酯可由α－溴代酮与碲氢化钠作用形成的烯醇盐与二硫代碳酸二乙酯进行乙氧硫代羰基化反应制得，３－氧代硫代羧酸酯的烯醇含量可由核磁振谱测得。