线条的玄妙——刘长年水墨画欣赏

刘长年简介: 　　原名刘春斌,1965年生于盘锦,受过不完整的初中教育,做过农民、装卸工、个体户、美工、记者、编辑,现任盘山县文体局干事,职业画家.2003年,由著名美术评论家陈岩发现并引见给黄永玉先生和著名画家何家英、宋涤等.2007年初,正式拜国画大家李宝瑞先生为师.……     

浅谈构建和谐警民关系的途径

警民关系是各种社会关系中的一个方面。构建和谐警民关系是构建和谐社会的重要部分,是做好新形势下社会稳定工作的根本保证。笔者试图全面分析当前警民关系的现状及和谐警民关系的重要性,并就如何构建和谐警民关系,提出相应的解决对策。     

NAFTA本田汽车原产地规则案再探——兼论对中国区域合作的启示

北美自由贸易区在本田汽车原产地认定方面,强调了在像汽车这种由很多重要部件和次要部件经常在多数国家中组装而成的产品原产地问题的重要性。本田案件提出的根本问题在计算中如何衡量非本土材料在组件的本地含量,加工成本是否可以囊括在当地含量之内,进而通过重新定义的净成本方法解决该问题。该案对中国区域合作中海关在原产地认定方面也具有...     

冷战后日本与东盟地区安全合作的限制因素分析

东盟和日本作为东亚地区体系的重要参与者,二者关系的发展与变化影响东亚未来的安全走向。冷战后,日本和东盟都奉行"综合安全"的观念,安全目标的重叠构成二者合作的基本条件。然而二者因原动力即各自利益追求不同而导致追求安全的目标以及路径也有所区隔。认知差别、权力结构和规范因素构成了限制二者合作的三个主要变量。在不同程度上三个方面的问题与二者获得综合安全的路径相互影响。而二者在多边安全合作对话平台中的摩擦与分歧恰可作为安全合作挑战的注脚。     

发挥表率作用 争创一流业绩

企业党员要学习科学理论,坚定理想信念,首先在思想觉悟上体现先进性;企业党员领导干部要提高修养、率先垂范,用良好的业绩和形象体现先进性;在岗党员要当好三个表率,争创一流业绩,立足本职岗位体现先进性;离退休党员要继续发扬好传统好作风,与时俱进,跟上时代发展的步伐。     

New Nonlinear Approaches for the Adjustment and Updating of a SAM

Many structural relationships should be taken into account in any reasonable adjustment and updating process. These structural relationships are mainly represented by ratios of different types, such as technical coefficients or the proportion of the cell value in relation to its row or column total. We believe that in many cases (either because of lack of information or when the time elapsed for the estimation of a social accounting matrix is not long enough to allow for any significant structural change) the updating process should try to minimize the rela- tive deviation of the new coefficients from the initial ones in a homogeneous way. This homogeneity would mean that the magnitude of this relative deviation is similar among the elements of each row or column, therefore avoiding the concentration of the changes in particular cells of the SAM. In this work, we propose some new adjustment criteria in order to obtain a more homogeneous relative adjustment of the structural coefficients. These criteria combine the adjustment method proposed by Matuszewski et al. (1964) with other deviation functions. Each of the adjustment criteria proposed leads to a nonlinear optimization problem which is reformulated as a linear program. We test the usefulness of this proposal by comparing its results with the ones obtained by more standard approaches and we are able to show that these approaches tend to produce a less homogeneous pattern of coefficient adjustment, under certain circumstances, than the ones we put forward.     

美国环保政治家与自由主义代表戈尔

阿尔·戈尔(Al Gore)是美国著名政治家,曾出任克林顿时期的副总统,并在2000年作为民主党候选人与小布什角逐总统,但这些政绩并非是其声名鹤起的原因,他对美国乃至当今世界最重要的贡献是他系统的环保思想.在奥巴马当选总统后,戈尔的环保理念将可能更加受到关注.     

DNA-based and taxonomic identification of forensically important Sarcophagidae (Diptera) in southeastern Spain

Studying dipterans at the scene of a death can provide essential information for interpreting the evidence and help to reconstruct the events happened to a corpse in the past. Molecular tools have been employed for identification at specific levels in the cases of cryptic species or poorly conserved specimens. Identification of specimens is essential in forensic entomology since each species has a specific growth rate, which determines the calculation of the minimum post mortem interval (minPMI). In addition, phylogeographic reconstruction within a species can help to differentiate the haplotypes from a geographic area, thereby helping to clarify the possible relocation of a corpse. The morphological identification of Sarcophagidae species is often difficult, especially for the females. This is an important Diptera family since some of its species are among the first to reach a corpse, especially in warm areas. In this study, we compared the sarcophagids found in human corpses in forensic cases in Alicante (southeast of Spain) with specimens collected from baited traps in the same area and surrounding provinces. In total, 189 specimens were collected, comprising 72 from forensic cases and 117 from baited traps. Molecular identification was conducted by sequencing the cox1 mitochondrial gene and analyzing the sequences using ABGD, GMYC, and BIN species delimitation methods. The median joining algorithm in the PopART program was used to construct phylogeographic networks. Eight species in the family Sarcophagidae were identified. The most widely collected species were Sarcophaga argyrostoma and Sarcophaga tibialis. The haplotype networks obtained for these species did not indicate a clear geographic distribution of haplotypes. The S. argyrostoma samples from Alcoy were clearly isolated. The results demonstrated that this method is useful for identifying Sarcophagidae samples in forensic investigations and it can be employed for minPMI estimation.     

National Identity or National Interest? Scottish,English and Welsh Attitudes to the Constitutional Debate

This article analyses political attitudes to the union in England, Scotland and Wales after the Scottish independence referendum. Using public opinion data, we explore constitutional preferences and perceptions of national grievance, before examining the role that national identity plays in structuring preferences. Our evidence shows that considerable demand exists for nationally demarcated forms of government within the UK, although these constitutional preferences do not translate in support for policy diversity across the UK. We also find evidence that these constitutional preferences relate closely to national identity, but relate also to appeals to national interest.     

Nondestructive Methods for Recovery of Biological Material from Human Teeth for DNA Extraction

The extraction of DNA from human skeletal remains applied to forensic, and evolutionary studies do not exclude risks, which are to be evaluated when working with unique specimens that could be damaged or even destroyed. In the present study were evaluated several nondestructive methods for recovering DNA instead of the most currently used pulverization method. Three different procedures to access inside the dental pieces (occlusal perforation, cervical perforation, and cervical cut) have been compared with the aim of recovering as many cell remains as possible to carry out a DNA extraction. Given the DNA quantitation results, a method was proposed that consists of a cervical cut to facilitate the access to the pulp cavity and a subsequent filing of the root canals down to the apex of the dental root. This methodology allows the recovery of both mitochondrial and nuclear DNA, with the minimum deterioration for the dental pieces.