论道德需要及其培养

一、道德需要培养的必要性长期以来,我国道德教育注重从应然层面强调人的道德责任,如人“应该”讲道德,“应该”无条件地为成就道德而舍己、牺牲、奉献、利他,这种牺牲是人的义务。但问题是,人何以需要道德?如何才能使人具有道德?道德与个人幸福是否有关?如果完全无关,人怎么可     

Allograftic bone marrow-derived mesenchymal stem cells transplanted into heart infarcted model of rabbit to renovate infarcted heart

Objective: To investigate the directed transplantation of allograftic bone marrow-derived mesenchymal stem cells (MSCs) in myocardial infarcted (MI) model rabbits. Materials and Methods: Rabbits were divided into 3 groups, heart infarcted model with MSCs transplanted treatment (MSCs group, n=12), heart infarcted model with PBS injection (control group, n=20), sham operation with PBS injection (sham group, n=l 7). MSCs labelled by BrdUrd were injected into the MI area of the MSCs group. The same volume of PBS was injected into the MI area of the control group and sham group. The mortality, LVIDd, LVIDs and LVEF Of the two groups were compared 4 weeks later. Tropomyosin inhibitory component (Tn I) and BrdUrd immunohistochemistry identified the engrafted cells 4 weeks after transplantation. Result: The mortality of the MSCs group was 16.7% (2/12), and remarkably lower than the control group's mortality [35% (7/20) (P＜0.05)].Among the animals that survived for 4 weeks, the LVIDd and LVIDs of the MSCs group after operation were 1.17±0.21 cm and 0.74±0.13 cm, and remarkably lower than those of the model group, which were 1.64±0.14 cm and 1.19±0.12 cm (P＜0.05); the LVEF of the MSCs group after operation was 63±6%, and remarkably higher than that of the model group,which was 53±6% (P＜0.05). Among the 10 cases of animals that survived for 4 weeks in the MSCs group, in 8 cases (80%),the transplanted cells survived in the non MI, MI region and its periphery, and even farther away; part of them differentiated into cardiomyocytes; in 7 cases (70%), the transplanted cells participated in the formation of blood vessel tissue in the MI region. Conclusion: Transplanted allograftic MSCs can survive and differentiate into cardiomyocytes, form the blood vessels in the MI region. MSCs transplantation could improve the heart function after MI.     

如何利用科学探究方法转变学生的学习方式

学生是学习的主体,通过科学探究,转变学生的学习方式,使学生从被动学习转为主动学习,体验学习的乐趣,从中获取知识和技能。     

组成于平行机和批处理机的二阶段混合流水作业问题

A hybrid two-stage flowshop scheduling problem was considered which involves m identical parallel machines at Stage 1 and a burn-in processor M at Stage 2, and the makespan was taken as the minimization objective. This scheduling problem is NP-hard in general. We divide it into eight subcases. Except for the following two subcases： （1） b≥ an, max{m, B} 〈 n; （2） a1 ≤ b ≤ an, m ≤ B 〈 n, for all other subcases, their NP-hardness was proved or pointed out, corresponding approximation algorithms were conducted and their worst-case performances were estimated. In all these approximation algorithms, the Multifit and PTAS algorithms were respectively used, as the jobs were scheduled in m identical parallel machines.     

奖惩分明 提高执行力的利器

随着经济的发展，买方市场的形成，各行各业的竞争越来越激烈，现在很多的中型企业都在发展过程中都普遍碰到了一个很头痛的问题——那就是执行力每况愈下。关于如何提高企业执行力这个问题，很多企业经营者经历了许多误区，走了一些弯路：一方面会想从先进的管理理论中寻找解决方案，也确实能在一些理论中找到某些的“解决办法”，但是实施之后总是事与愿违，难收成效。一方面则是想通过参观成功企业，学习其做法来改变现状，但是成功企业执行很好的方案、制度，到了自己手中却难有作为（当然也有成功的例子）。     

物理实验教学中创新能力培养初探

物理是一门实验科学,因此在物理教学中开发学生的创新思维能力,离不开实验教学.学生在实验中通过观察、动手发现问题,再通过思考、分析、动手解决问题,从而不断提高思维创新能力.本文就物理实验教学中如何培养学生的创新能力谈几点看法.     

外语情感教育中的沟通策略

外语学习既是一个认知过程，又是一个情感过程。它们互相联系、互相作用和互相制约，是一个和谐的统一体。本讨论了情感对外语学习的重要作用以及外语情感教育中有效的沟通策略。     

我国青少年法治教育存在的问题及对策探析

针对近年来青少年违法犯罪率上升的现实,我们应采取有效措施加强青少年法治教育,主要是:加强对青少年进行法治核心含义的教育,引导青少年正确认知法治;引导青少年树立正确的权利意识和道德观;拓宽法治教育途径,重视学校环境教育和社会生活教育;着力提高中小学法治课教师以及其他教师的法治素质;等等。