Mathematical models of canine right and left atria cardiomyocytes

The aim of this study is to build two mathematical models of canine ionic currents specific to right atria and left atria.The canine left atria mathematical model was firstly modified from the Ramirez-Nattel-Courtemanche(RNC) model using the recently available experimental data of ionic currents and was further developed based on our own experimental data.A model of right atria was then built by considering the differences between right atria and left atria.The two developed models well reproduced the exper...     

巢湖区域文化性格特征浅析

区域文化性格是特定区域文化内群体性格特征的表现,巢湖区域文化的长期积淀与内化,形成了该地区特有的区域文化性格.本文试图对这一文化现象作一粗略探讨,以进一步把握巢湖区域文化的内涵与特质.     

Hg~（2＋）胁迫培养对水生植物根际微生物的影响

采用水培方法,在实验室条件下,选择不同浓度的Hg2＋对大薸（Pistiastratiote）、慈姑（Sagittaria sagittifolia L）和穗状狐尾藻（Myriophyllum spicatum Linn.）进行胁迫培养,通过测定三种水生植物根系的微生物区系及与氮循环细菌的数量变化,分析三种水生植物根际微生物对重金属Hg2＋的耐受性,微生物区系结构和与氮循环有关的细菌的数量变化。结果发现,Hg2＋胁迫改变了水生植物根系微环境,对微生物区系结构产生明显的影响;氮循环细菌生理类群的数量随着外源重金属Hg2＋浓度变化表现出一定的特殊性和复杂性。     

“人的全面发展”理念下的育人途径探索

以＂人的全面发展＂理念为框架,探索大学生培养新途径。提出管理育人、教书育人、校园文化育人、实践育人的途径。     

教育相关群体的教师角色期望之社会调适和教师自我调适

笔者的调查表明,现时我国教育相关群体的教师角色期望存在差异并表现出以下特点:变与不变的共存,一致与冲突的共存,合理与不合理的共存。为了调适存在的差异,社会对教师角色的期望应尽可能做到合理性和可行性、主体性和实践性、个人价值和社会价值的统一,教师自身也应重视角色学习,提高角色认知水平;提高自身素质,增强角色适应能力;重视沟通,积极寻求契合自身的角色系统。     

略论我国反垄断私人执行体制的建构

私人执行体制的缺少,导致《反垄断法》不能很好地被执行,实现不了其预期的价值。建构私人执行体制有相当的迫切性和可行性。合理的私人执行模式应当有宽泛的私人执行的主体资格、三倍以内惩罚性损害赔偿制度、人数不特定的代表人诉讼制度、主要由垄断方承担诉讼费制度、仲裁解决垄断法律争议五个方面。     

Laboratory investigation of the strength development of alkali-activated slag-stabilized chloride saline soil

Saline soil stabilization is being increasingly applied in foundation treatment engineering. Chloride saline soil obtained from sites and laboratory-made chloride soil (ZS) with various NaCl concentrations prepared artificially were stabilized using alkali-activated slag (AS). A series of unconfined compressive strength (UCS) tests, X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDXA), thermal gravity-differential thermal gravity (TG-DTG), and ion concentration tests were conducted to investigate the strength variation and mechanism of the AS-stabilized chloride saline soils. The results showed that NaCl has a significant influence on the strength of AS-stabilized chloride saline soil and the strength of AS-stabilized ZS (GZS) increases with increase of chloride content in soil samples. Friedel’s salt (Fs) and NaOH are generated by the reaction of NaCl and CaO·Al2O3 (CA) in the slag in the GZS. Fs can fill the pores in stabilized soil, and NaOH can promote calcium silicate hydrate (CSH) generation. These two effects combine to enhance the strength of GZS. The relationship between the rate of increase of 28-d UCS of AS-stabilized chloride saline soil and the chloride content in soil was obtained through regression analysis of the increase of UCS of GZS.     

谈公共图书馆视障服务

图书馆是视障人群学习、交流、沟通的重要场所。但我国公共图书馆服务视障读者在文献建设、设备使用、馆内外设施环境、图书馆网络建设、工作人员素质等方面存在着许多不足之处,最后,针对这些不足提出相应的改善意见以作为提高公共图书馆视障服务质量的借鉴。     

Direction of arrival tracking for signals with known waveforms based on block least squares techniques

In this paper, we address the problem of tracking DOA of multiple moving targets with known signal source waveforms and unknown gains in the presence of Gaussian noise using a nonuniform linear array. Herein, we make use of the fact that the output of each sensor can be described as a linear regression model whose coefficients each contain a pair of DOA and gain information corresponding to one target. These coefficients are determined by solving a linear least squares (LS) problem and then updated recursively based on a block QR decomposition recursive least squares (QRD-RLS) technique or a block regularized LS technique. Since the coefficients from different sensors have the same amplitude but variable phase information for the same signal, along with simple algebraic manipulations the well-known generalized least squares (GLS) are used to obtain an asymptotically-optimal DOA estimate without requiring a search over a large region of the parameter space. Computer simulations show that the proposed DOA tracking techniques when applied to a sparse antenna array can provide a better tracking performance than some of the existing methods do.     

关于“走出去”战略之我见

“走出去”是未来5-10年我国对外开放战略的一项重要举措。目的在于充分利用“两种资源,两个市场”,努力拓宽我国产品、资金、技术在国际市场上的竞争领域,使原本单一的“引进来”变成“引进来”与“走出去”并重的战略格局。