呈味核苷酸及其生产应用的研究

以5‘-肌苷酸和5‘-鸟苷酸为代表的5’-核苷酸作为一种新型的添加剂，已逐渐应用于食品的调味中，本文讨论了5’-核苷酸的结构、性质和呈味特点，介绍了四种呈味核苷酸的生产方法，并就呈味核苷酸的应用和发展进行了阐述。     

克莱姆法则历史研究

目的 理清Cramer’s Rule的发展脉络。方法 运用综合比较与历史分析的方法，对Cramer’s Rule的起源进行探究。结果 马克劳林虽然比克莱姆早两年发现Cramer’s Rule，但不及克莱姆发现的规律明晰。2人都是从线性方程组的求解入手，都是用线性方程组的系数给出解的表达。结论 Cramer’s Rule称为Maclaurin-Cramer’s更恰当一些。他们都是从线性方程组的求解入手，都是用线性方程组的系数给出解的表达式。     

二元Baskakov－Kantorovic算子的L_p逼近

讨论了二元Ｂａｓｋａｋｏｖ－Ｋａｎｔｏｒｏｖｉｃ算子对ｆ∈Ｌ＿ｐ（ｓ）在空间Ｌ＿ｐ（Ｓ＿Ｎ）上的逼近定理．     

Programmed cell death during terminal bud senescence in a sympodial branching tree, Eucommia ulmoides

Eucommia ulmoides Oliv. is a typical sympodial branching tree. The apical bud of the branch ages and dies every year, replaced by the nearby axillary bud in the second year. Structural assays and a series of biochemical analyses were performed to analyze the senescence mechanism in the apical bud. It was revealed that most cells of the apical bud underwent the programmed cell death (PCD) during the senescence: the chromosomes were congregated and the nuclear contents were condensed, as shown by 4′,6-diamidino-2-phenylindole (DAPI) fluorescence. DNA fragmentation was detected during senescence using the terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end in situ labeling (TUNEL) method, coincident with the appearance of a DNA ladder. Moreover, a 20 kD DNase related to fragmentation was found. PCD was initiated first in the young leaves, leaf primordia and peripheral zone cells, then in the central mother cells and initial layer cells in the apical meristem. The terminal buds remain in vegetative growth during senescence, in contrast to buds of many annual plants.     

Synchronization of two 3-scroll hyperchaotic attractors using wavelet transform

1 .INTRODUCTIONChaotic synchronizationis a key technology in cha-otic secure communication, the low di mensionalchaotic systems have only one positive Lyapunovexponent ,the performance of securityis not ideal ,hyperchaotic systems have two or more than twopositive Lyapunov exponents , the performance ofsecurityisi mproved greatly ,sothe synchronizationof hyperchotic systems has arisen great inter-est[1 ~4].N-scroll( N =3,4,5...)attractor is akind of hyperchaotic attractor ,the method of g…     

有“任务”学生才会去“务”——《Let＇s eat》中说任务型教学

【理念】英语教学的最终目的就是培养儿童运用英语的能力，任务型教学法是一个很好的途径。     

Novel Newton’s learning algorithm of neural networks

1 .INTRODUCTIONBP methodis a widely used classical learning algo-rithmof Neural Networks . Whileit has two short-ages ,i .e .slowconvergence rate and existinglocalmini mum of the cost function. Many new algo-rithms such as modification methods of BP meth-od, conjugate gradient methods , RLS methods ,quasi-Newton methods , evolving learning meth-ods ,chaos-learning algorithms have been proposedso far[1 ~7]. However ,these novel algorithms neverdirectly utilize the 2-ed order differentia…     

草酰胺配合物的热分解动力学研究——Ⅱ.N,N‘—双（3—氨丙基）草酰胺合酮（Ⅱ）

应用TG－DTG－DTA热分析技术研究了N，N‘－双（3－氨丙基）草酰胺合铜（Ⅱ）配合物在空气气氛中的热行为；并对其非等温TG数据分别用微分法（Achar法）和积分法（Coats-Redfen法）进行了解析。通过对比热分解动力学参数，提出了N，N‘－双（3－氨丙基）草酰胺合酮（Ⅱ）配合物热分解反应机理；根据TG曲线计算出了E，lnA和△S^*，并由动力学补偿效应获得了E与lnA的数学表达式。