Scaling behavior of nucleotide cluster in DNA sequences

In this paper we study the scaling behavior of nucleotide cluster in 11 chromosomes of Encephalitozoon cuniculi Genome. The statistical distribution of nucleotide clusters for 11 chromosomes is characterized by the scaling behavior of P（S） ∝ e^-αs＇ where S represents nucleotide cluster size. The cluster-size distribution P（S1＋S2） with the total size of sequential C-G cluster and A-T cluster S1＋S2 were also studied. P（S1＋S2） follows exponential decay. There does not exist the case of large C-G cluster following large A-T cluster or large A-T cluster following large C-G cluster. We also discuss the relatively random walk length function L（n） and the local compositional complexity of nucleotide sequences based on a new model. These investigations may provide some insight into nucleotide cluster of DNA sequence.     

马克思辩证法的本体论批判

当马克思辩证法被庸俗化为一种方法时,它成了没有原则的代名词,通过几位思想家的评述,反思辩证法、剖析辩证法,以期正本清源。从古希腊开始的对本体的追求已经蕴含了辩证法的因子,由于把批判性的本体论探索变成了对“本体”的非批判性信仰,辩证法被形而上学的外壳紧紧包裹。马克思辩证法以扬弃的形式容涵了传统哲学本体论的种种内在矛盾,使本体论批判得以转化为“合理形式”的辩证法。     

Polychlorinated dibenzo-p-dioxins and dibenzofurans in flue gas emissions from municipal solid waste incinerators in China

Polychlorinated dibenzo-p-dioxins and furans （PCDD/Fs） emissions in flue gas from two types of municipal solid waste incinerators （MSWIs） most commonly used in China were investigated in this study. The selected incinerators include two grate-type MSWIs： MSWI-A （350 t/d） and MSWI-B 050 t/d）, and two fluidized bed MSWIs： MSWI-C （400 t/d） and MSWI-D （400 t/d）, which are all equipped with semi-dry lime scrubber and bag filter except MSWI-D equipped with cyclone and wet scrubber （WS） as air pollutant control device （APCD）. Results indicated that the emission concentration and the international toxic equivalents （I-TEQs） of the PCDD/Fs from the stacks were in the range of 1.210-10.273 ng/Nm^3 and 0.019-0.201 ng I-TEQ/Nm^3, respectively. They were greatly lower than the emission regulation standard of PCDD/Fs in China （1.0 ng I-TEQ/Nm^3）. However, only the PCDD/Fs emission level from MSWI-C was below 0.1 ng I-TEQ/Nm^3. Although the homologue profiles were distinct, the contributions of the 2,3,7,8-subsituted congeners to the total I-TEQ were similar among all the investigated MSWIs. Two major 2,3,7,8-substituted congeners, 2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDD, account for 47% and 9% （average values） of the total I-TEQ values, respectively. The correlation between PCDD/Fs levels and composition of flue gas was also discussed.     

英国大学内部管理制度的研究与借鉴

建设科学、有效的内部管理制度,对形成大学竞争力具有重要意义。突破传统官僚制体系,建设适宜基层学术组织发展的制度环境,形成智力资本的集聚和以科研为导向的知识创新模式,是英国大学内部管理体制变化的新特点。借鉴英国的经验,我国应继续推进高校依法自主办学,发挥政府在大学资源配置方面的引导作用,进一步推动学校内部教学科研机构的整合。     

教师创造性能力的培养

本文阐述了教师创造性能力在创新人才培养中的作用,并深入分析了教师创造性能力缺失的主客观原因,认为当前对教师创造性能力的培养必须从"五个统一"入手:转变教育观念与增强教师主体意识的统一;培养创造性教育能力与创造性学习能力的统一;营造创造性环境与培养教师内在创造性品质的统一;发展个性与培养团队精神的统一;开发智力与培养非智力因素的统一。     

Polychlorinated dibenzo-p-dioxins and dibenzofurans in flue gas emissions from municipal solid waste incinerators in China

Polychlorinated dibenzo-p-dioxins and furalls(PCDD/Fs)emissions in flue gas from two types of municipal solid waste incinerators(MSWIs)most commonly used in China were investigated in this study.The selected incinerators include two grate-type MSWIs:MSWl-A(350 t/d)and MSWI-B(150 t/d),and two fluidized bed MSWIs:MSWI-C(400 t/d) and MSWI-D (400 t/d),which are all equipped with semi-dry lime scrubber and bag filter except MSWI-D equipped with cyclone and wet scrubber(WS)as air pollutant conffol device(APCD).Results indicated that the emission concentration and the international toxic equivalents(I-TEQs)of the PCDD/Fs from the stacks were in the range of 1.210～10.273 ng/Nm3 and 0.019～0.201 ngI-TEQ/Nm3,respectively.They were greatly lower than the emission regulation standard of PCDD/FS in China(1.0 ng I-TEQ/Nm3).However,only the PCDD/Fs emission Ievel from MSWI-C Was below 0.1 ng I-TEQ/Nm3.Although the homologue profiles were distinct,the contributions of the 2,3,7,8-subsituted congenem to the total I-TEQ were similar among all the investigated MSWIs.Two major 2,3,7,8-substituted congeners,2,3,4,7,8-PeCDF and 1,2,3,7,8-PeCDD,account for 47% and 9%(average values)of the total I-TEQ values,respectively.The correlation between PCDD/Fs levels and composition of flue gas Was also discussed.     

素质教育中教师素质刍议

教师肩负着振兴教育的重任,素质教育对教师提出了新的更高的要求。作为二十一世纪的教师要掌握先进的教学理论,全面提高自身素质,这是实施素质教育的根本保证。教师是一部活教材,无论是言传身教,还是潜移默化,对学生的影响都是无法估量的。     

D406A钢K_(Ic)与动态力学性能的相关性研究

为总结D406A钢的静态断裂韧性KIc值与动态力学性能间的关系,分别采用三点弯曲试样以及标准冲击试样对D406A钢进行了KIc测试和仪器化冲击试验,发现室温下该材料的冲击功CVN与断裂韧度KIc存在着相同的变化趋势,两者间的对应关系与修正后的Rolfe-Novak经验公式基本相符,今后可以通过该公式来推断材料的KIc值。利用标准冲击样所获得的动态断裂韧度KId与静态断裂韧度KIc虽遵循相同的变化规律,但相关性不是特别理想,这主要是由于一方面动态加载条件下试样的受力情况远比静态下要复杂,这更容易导致KId的离散;另一方面标准冲击样并不是一个理想的裂纹体,缺口尖端在断裂之前会普遍屈服,这也会给KId的计算带来较大误差。     

高职毕业生就业问题及对策研究

该文综述了高职毕业生就业问题研究现状,分析了高职毕业生就业存在的问题及原因,提出了解决高职毕业生就业问题的对策。     

做先进文化前进方向的忠实代表--学习江泽民同志"三个代表"论述的体会

江泽民同志关于"三个代表"的重要论述,是我们的立党之本、执政之基、力量之源.本文从中国共产党为什么要做先进文化前进方向的代表和中国共产党应如何做先进文化前进方向的代表两个方面,对江泽民同志关于中国共产党要成为先进文化前进方向的忠实代表这一重要思想进行分析和论述.