NiSi／Si（001）声子模式对称性分析

通过极化拉曼对以Si（001）为衬底、生长方向为NiSi[200]//Si[001]NiSi薄膜材料的拉曼峰进行了声子模式的分组,确定实验得到的NiSi薄膜的六个拉曼峰分别属于三类声子模式．其中213cm^-1、295cm^-1和367cm^-1处拉曼峰属于Ag对称性;196cm^-1和254cm^-1处拉曼峰属于B3g对称性;401cm^-1。处拉曼峰属于B1g或B2g对称性．     

唐诗里的两极社会透视

从唐诗里采录有关贫、富两阶层两极生活的代表诗篇作为引线,比对了大唐社会上流阶层的繁富豪奢以至腐朽堕落和底层民众艰辛度日的痛苦生存现状。穿越时空,考察、认识大唐帝国繁荣强大的表象背后所隐藏的贫富差距过大、社会两极分化的严峻问题,解析了个别关注草根民生问题的诗人的赤子之心、仁者情怀、忧患意识。指出严重的社会两极分化正是大唐社会不和谐不可持续发展的主要原因。     

关于推导束缚电荷密度的修改意见

在通常推导束缚电荷密度的过程中,笼统的将nql看作电极化强度是不准确的,提出了修改意见.     

浅议反射光的偏振态

本文讨论了自然光入射到两种介质的交界面时,反射光的偏振状态。发现反射光的偏振态与入射角和两介质的相对折射率有关。     

激电在新疆索尔库都克东铜矿勘查中的应用

激发极化法是以不同岩、矿石激电效应之差异为物质基础,通过观测和研究大地激电效应探查地下情况的一种方法。该方法在我国金属与非金属固体矿产勘查中有着广泛的应用,效果显著。本文主要讲述了以激电法为主要手段结合区域地质资料对新疆富蕴县索尔库都克东铜矿区进行勘探和解释。根据这些岩石的物性(电阻率、激发极化率)差异明显的特点,通过激电中梯方法,对1961个测点进行数据采集。其数据处理的过程主要是采用绘图软件对所测量的数据绘制相关图件,并解释分析。通过分析对比,进而推测探矿远景区。     

Environmental Melodrama

Rhetorical scholarship criticizes melodrama for its tendency to simplify and reify public controversies and valorizes the comic frame as an ethically superior mode of rhetoric. These judgments are rooted in the discipline's reliance on Burkean categories, a reductionist conception of melodrama, and an implicit assumption that social unification should be the telos of rhetoric. In response, this essay advances a concept of melodrama as an integrated set of rhetorical appeals. It uses examples of environmental rhetoric to illustrate how the inventional resources of melodrama can transform public controversies and oppose dominant discourses that rationalize or obscure threats to the quality and existence of life on Earth. Based on these arguments, the essay endorses a sophistic critical perspective that foregrounds timeliness as the primary ground for rhetorical judgment and refuses to treat any rhetorical frame as inherently superior to another.     

民族地区图书馆数字化建设两极分化危害之分析

国家民委2007年度科研项目＂中国民族及民族地区图书馆调查与研究＂反映了民族地区图书馆的最新状况.文章将民族地区图书馆分为省级（自治区）图书馆、高等院校图书馆,地市级、市辖区图书馆,自治县、旗基层图书馆3个层次,以网络平台建设、自动化管理、数据库建设为指标,进行横向与纵向的立体交叉比较,分析其数字化建设现状,以具体数字阐明了民族地区图书馆数字化建设的现状：高等级图书馆与县、旗基层图书馆两极分化现象十分严重,数字鸿沟加剧 民族地区基层图书馆服务功能和生存能力的弱化,损伤了当地的文化事业,减弱了基层政权的舆论宣传力度、文化认同程度,减慢了民族共同心理的发展与升华.     

Understanding productivity dynamics: A task taxonomy approach

As job markets have been polarizing, firms have been changing their labor inputs. By using matched employer–employee data for Portugal, we examine whether labor market polarization has occurred within or across firms and how labor input upgrades have contributed to overall productivity growth. We develop a firm taxonomy based on worker's occupational data. Firms can be focused on one task – Abstract, Manual or Routine – on a combination of tasks, or none. Results show that Abstract firms are the most productive and their share has increased over time. Manual firms, the least productive, have had a stable share throughout the period. Routine firms have seen their share decline over time. The dynamic decomposition of the estimated productivity reveals that productivity growth is propelled by increased market shares of the most productive incumbents and exiting of the least productive, especially for Abstract firms. Notwithstanding these productivity growth drivers, they fail to avert the productivity stagnation observed in Portugal between 2004 and 2009 due to the overall decline in productivity of incumbent firms, especially Routine. We discuss the policy implications of our results which are relevant to other European economies also lagging behind in terms of knowledge and innovation capabilities.     

椭圆偏振光的示波展示

从示波器X-Y,图示仪波形形成原理出发,展示了椭圆偏振光的合成图像,也分析了椭圆偏振光的左旋右旋情况,从另一角度更直观展示了抽象的椭圆偏振光的合成。     

Probing primordial gravitational waves: Ali CMB Polarization Telescope

In this paper, we will give a general introduction to the Ali CMB Polarization Telescope (AliCPT) project, which is a Sino–US joint project led by the Institute of High Energy Physics and involves many different institutes in China. It is the first ground-based Cosmic Microwave Background (CMB) polarization experiment in China and an integral part of China''s Gravitational-wave Program. The main scientific goal of the AliCPT project is to probe the primordial gravitational waves (PGWs) originating from the very early Universe. The AliCPT project includes two stages. The first stage, referred to as AliCPT-1, is to build a telescope in the Ali region of Tibet at an altitude of 5250 meters. Once completed, it will be the highest ground-based CMB observatory in the world and will open a new window for probing PGWs in the northern hemisphere. The AliCPT-1 telescope is designed to have about 7000 transition-edge sensor detectors at 95 GHz and 150 GHz. The second stage is to have a more sensitive telescope (AliCPT-2) with more than 20 000 detectors. Our simulations show that AliCPT will improve the current constraint on the tensor-to-scalar ratio r by one order of magnitude with three years'' observation. Besides the PGWs, AliCPT will also enable a precise measurement of the CMB rotation angle and provide a precise test of the CPT symmetry. We show that three years'' observation will improve the current limit by two orders of magnitude.