一种基于555集成电路的恒温器设计

文章通过对555电路的分析，结合双向可控硅和运放F007的特性进行恒温电路设计。     

科学发展观视域下的经济法探微

科学发展观是崭新的哲学理论，经济法是现代法律制度，虽然不在同一层次上，但是科学发展观与经济法具有一定的内在联系。科学发展观对经济法的立法、实施具有重要的指导意义，而经济法是实现科学发展观的主要制度性方法：     

高斯型Runge-Kutta方法研究

提出了一类高斯型Runge—Kutta公式的推导思想，并具体的给出了一个两点三阶高斯型Runge—Kutta公式，证明了高斯型Runge—Kutta公式的精度高于传统的对应的Runge—Kutta公式。     

In-situ cosmogenic 36Cl denudation rates of carbonates in Guizhou karst area

This study quantifies surface denudation of carbonate rocks by the first application of in-situ cosmogenic36Cl in China. Concentrations of natural Cl and in-situ cosmogenic36Cl in bare carbonates from Guizhou karst areas were measured with isotope dilution by accelerator mass spectrometer. The Cl concentration varied from 16 to 206 ppm. The 36Cl concentrations were in range of (0.8-2.4)106 atom g-1 , resulting in total denudation rates of 20-50 mm ka-1 that averaged over a 104-105 a timescale. The 36Cl-denudation rates showed roughly a negative correlation with the local mean temperature. This preliminary observation may suggest the variations of proportions of chemical weathering and physical erosion in denudation process, depending upon local climatic conditions.     

一次同余式组的两种求解方法

运用矩阵的初等变换法和不定方程求解法,给出了求解同余式组的两种简便方法.     

股票数据与MATLAB通讯接口的构建

文章通过对股票行情软件日线数据的分析,借助MATLAB外部编程接口,实现了MATLAB获取外部股票行情软件的K线数据。利用MATLAB强大的分析功能,实现对股票数据的分析。     

On the risk management of the construction phase of the Yi River right bank levees

文章以沂河右岸防洪堤工程施工为例,介绍了防洪堤的施工风险,并提出应对措施,为今后类似施工提供借鉴.     

Electronic transport properties of capped-carbon-nanotube-based molecular junctions with multiple N and B dopants

By applying non-equilibrium Green’s function in combination with density functional theory,we investigated the electronic transport properties of capped-carbon-nanotube-based molecular junctions with multiple N and B dopants.The results show that the electronic transport properties are strongly dependent on the numbers and positions of N and B dopants.Best rectifying behavior is observed in the case with one N and one B dopants,and it is deteriorated strongly with the increasing dopants.The rectifying direction is even reversed with the change of doping positions.Moreover,obvious negative differential resistance behavior at very low bias is observed in some doping cases.     

运用现代汉语规律突破文言文学习难点

文言文与现代汉语差异极大,如何有效提高文言文的学习水平是困扰众多文言文学习者的一大难题,但以文言文与现代汉语的联系为落脚点和出发点,借助现代汉语语法分析并掌握文言文学习中的两大难点却是行之有效的方法。