基于TMS320F2812的CANopen协议的通信实现

CANopen是一种开放的现场总线协议,是欧洲嵌入式工业控制网络的主要标准协议.在分析CANopen协议的对象字典、设备模型和通信对象等的基础上,采用CANopen协议的子协议DS301实现了基于CAN总线的TMS320F2812与主控模拟调试软件之间的通讯,并通过测试验证了通讯过程中信息传递的正确性和可靠性.     

教学过程本质探析

不同的教育理论学派或持不同研究方法的学者对教学过程的本质会作出迥然各异的研究界定。把握教学过程本质＂本体存在＂和＂观念存在＂的不同意义,在充分肯定各研究学说理论价值、历史地位和应有的合理性的前提下,突破传统教学过程本质观的局限,以现代哲学新思维构建交往实践本质观、生命体验本质观、理解互融本质观和建构生成本质观,从而在理论扬弃的基础上观照教学改革实践的实际问题,促进理论本身的发展,进而给予实践以更加有效的指导。     

“无为而治”在员工自我管理中的运用

“无为而治”是道家思想的核心内容。可从“无为而治”的含义入手,阐述其在现代行政管理中运用的现实意义,以及如何用“无为而治”思想引导员工进行自我管理,到达管理的最高境界。     

西方教育市场化观点对中国高等教育的启示

市场经济体制的建立改变了我国高校由国家直接管理,政府统一办学的单一形式,提倡政府办、社会办、企业办、集资办等多种办学形式。但是,目前中国高校经营非市场化,会影响中国高等教育的全面发展。新自由主义经济理论中的高等教育市场化观点及影响给我们以启发。     

自然之美的旁观者——论艾米莉·狄金森自然诗歌之生态意识

生态美学是生态学与美学的一种有机的结合,是运用生态学的理论和方法研究美学,将生态学的重要观点吸收到美学之中,从而形成一种崭新的美学研究视角。狄金森的自然诗歌具有强烈的生态意识,她以旁观者的身份描写自然,与自然和谐共存而又逃离自然,展示了其作为自然旁观者的审美思想。     

淋巴管生成在食管鳞癌进展中的意义

目的:探讨食管鳞状细胞癌组织中淋巴管生成的临床病理意义.方法:应用单克隆抗体D2-40检测食管癌周围和中心区以及正常食管组织中微淋巴管密度(lymphatic micro vessel density,LMVD),分析其与食管癌患者年龄、性别、食管癌分化程度、淋巴结转移的关系.结果:肿瘤周围区LMVD明显高于中心区和正常组织.肿瘤周围区LMVD和淋巴结转移密切相关,而与肿瘤的分化程度无关.结论:食管癌在肿瘤周围区存在着明显的淋巴管形成,检测肿瘤周围淋巴管密度可以预测肿瘤淋巴结转移,因此具有良好的临床病理应用价值.     

Effect of high glucose levels on the calcification of vascular smooth muscle cells by inducing osteoblastic differentiation and intracellular calcium deposition via BMP-2/Cbfα-1 pathway

In this paper,we investigate the effect and the possible mechanism of high glucose levels on the calcification of human aortic smooth muscle cells (HASMCs).HASMCs were divided into four groups: normal glucose group (NG),osmolality control group (OC),high glucose group (HG,HASMCs culture medium containing 30 mmol/L glucose),and high glucose plus recombinant human Noggin protein (bone morphogenetic protein-2 (BMP-2) antagonist) group (HN).The mRNA levels and the protein expressions of BMP-2 and core binding factor alpha-1 (Cbfα-1) were measured by real-time quantitative polymerase chain reaction (PCR) and Western blot.After induced by 10 mmol/L β-glycerol phosphoric acid,cells were harvested for assessments of alkaline phosphatase (ALP) activities at Days 1,2,and 3,and intracellular calcium contents at Days 7 and 14,respectively.High glucose levels increased the mRNA levels and the protein expressions of BMP-2 and Cbfα-1 (P0.05).The expression of Cbfα-1 was partially blocked by Noggin protein (P0.05),while BMP-2 was not (P0.05).After being induced by β-glycerol phosphoric acid,high glucose levels increased the ALP activity [(48.63±1.03) vs.(41.42±2.28) U/mg protein,Day 3;P0.05] and the intracellular calcium content [(2.76±0.09) vs.(1.75±0.07) μmol/mg protein,Day 14;P0.05] in a time-dependent manner when compared with the NG group,while the ALP activity could not be blocked by Noggin protein [(48.63±1.03) vs.(47.37±0.97) U/mg protein,Day 3;P0.05].These results show that high glucose levels can evoke the calcification of HASMCs by inducing osteoblastic trans-differentiation and intracellular calcium deposition via the BMP-2/Cbfα-1 pathway,which can be partially blocked by Noggin protein.     

贯彻落实科学发展观 提高部队党委的决策水平

科学发展观是我国经济社会发展的重要指导方针,是中国特色社会主义必须坚持和贯彻的重大战略思想。是加强和改进党的建设的强大理论武器。党委是领导部队建设的核心,党委决策是否科学关系到部队的全面发展。因此,必须贯彻落实科学发展观要求,提高党委科学决策的水平,确保各项工作高起点、高标准和部队建设的高质量。     

孙子的“全”胜思想与《周易》

《孙子兵法》有两种不同的全胜:一是政治全胜,即《谋攻篇》不战而屈人之兵的"全"胜;二是军事全胜,即《形篇》保存自己、消灭敌人的"全"胜。二者辩证统一,相得益彰。前者的理论渊源和历史根据全部来自于《周易》。"全"胜的实质是仁胜,其源出于《周易》汤武革命观。牧野之战是不战而胜的典范。"全"胜的理念是人性,其源出于《周易》的天德仁爱观。"保合太和"给"全"胜奠定了人性基石。"全"胜的策略是怀柔,其源出于《周易》的师贞正义观。唯正义之师可保怀柔之效。"全"胜的宗旨是和平,其源出于《周易》的和谐统一观。唯"元永贞"的德化能结和谐统一的和平之果。"全"胜思想的价值在于减少或避免战争,对中国历史有深远影响,对当代世界有重大意义。     

Catalytic dechlorination and detoxification of 1-（2-chlorophenyl） ethanol by Pd/Fe

1-（2-chlorophenyl） ethanol （CPE） is of health and environmental concern due to its toxicity and its use as an intermediate in pharmaceutical manufacturing. The current work deals with the catalytic reductive dechlorination and detoxification of CPE by Pd/Fe bimetal. CPE was effectively dechlorinated to l-phenyl ethanol （PE） accompanied by the equivalent release of chloride. The extent of CPE dechlorination increased with temperature, Fe dosage and Pd loading. A decrease in solution pH increased CPE dechlorination, resulting presumably from an increase in hydrogen production. Under the specific conditions of 20 g/L Pd/Fe, 0.10% Pd （w/w） and initial pH 5-6, the CPE dechlorination was completed within 145 rain. The dechlorination followed a pseudo-first-order kinetics with an activation energy of 56.7 kJ/mol. The results of toxicity testing showed that CPE was very toxic to Chlorella, whereas PE showed little toxicity. The toxicity of the reaction solution declined gradually and the promoting effects on Chlorella intensified consequently with the dechlorination process. Thus, the reductive dechlorination of CPE to PE by Pd/Fe was a detoxification process. It may be used to effectively reduce the toxicological effects of CPE-contaminated wastewater, thereby enhancing the performance of subsequent biological processes in wastewater treatment.