视频图像侦查中涉案目标消失的原因分析与应对

在视频图像侦查过程中,经常会发生视频追踪对象在某个特定区域的视频监控图像中＂消失＂的现象。它可能是由于存在监控盲区造成的,也有可能是由于犯罪嫌疑人的反侦查行为,或者侦查员在视频监控资料收集、处理、查看过程中存在问题造成的。因此,我们可以通过合理布局,减少监控盲区,广泛收集和处理视频监控资料,深入查看和分析视频消失区域,多种侦查手段并用等途径来加以应对。     

间断—平衡模型：长期政策变迁的非线性解释

政策变迁并非只是渐进的过程,重大的政策转变和政策中断也时常发生。以逻辑经验主义为基础的渐进主义模型只强调政策的渐进性变迁,而忽略政策的间断性变迁。建立在库恩科学范式基础上的政策研究不仅关注政策的渐进性变迁,而且也关注政策的间断性变迁。＂间断-平衡模型＂建立在有限理性决策和制度结构基础上,认为政府政策制定具有稳定性和间断性的特点。该模型有效解释了长期政策稳定过程中伴有偶尔急剧变迁的现象,为长期政策变迁提供了新的解释框架。本文介绍了＂间断-平衡模型＂的缘起、理论基础、核心观点、解释过程等几个方面,最后对模型进行简要评述。     

Passport examination by polarized infrared spectra

In this study, a new nondestructive technique for passport examination is proposed. In this technique, linearly polarized light is used to measure Fourier transform infrared (FT-IR) reflectance spectra of films on the biographical data page. Thirty genuine and thirty-five counterfeit Japanese passports and five marketed films pasted on name cards were examined. The measured spectra were analyzed as follows. The absorption spectra were obtained by the Kramers-Kronig transformations of reflectance spectra. The peak ratios were then calculated from the absorption spectra by adding the peak areas at 1126 and 1263 cm(-1) and dividing the result by the peak area at 1727 cm(-1). When nonpolarized light was used, the samples could not be distinguished by comparing the peak ratios. However, when polarized light was used, they were successfully distinguished by the comparison. Therefore, polarized light is useful for the forensic discrimination of passport films by the measurement of FT-IR spectra.     

Optical Characterization of Some Modern “Eco‐Friendly” Fibers*

Abstract: Fibers that are termed “eco‐friendly” or “biodegradable” by manufacturers are increasingly being used in textile products such as apparel and carpeting to appeal to the ever more environmentally aware public. As such, these modern fibers are expected to begin showing up more often in forensic casework, and it is important that the forensic examiner recognize them. This study employed polarized light microscopy (PLM) and Fourier transform infrared (FTIR) microspectroscopy to characterize selected fibers of azlon, polylactic acid (PLA), cellulose composites of alginate or chitin, and bamboo (viscose rayon). Fiber cross‐sections, refractive indices, melting points, solubilities, and FTIR measurements were conducted. Results indicate that the azlons and PLA fibers are easily distinguishable from other textile fibers by their optical and chemical properties. The cellulose composites show only small differences in comparison with other cellulose‐based fibers, while bamboo viscose rayon is indistinguishable from normal viscose rayon.     

利用足迹自动识别系统对现场足迹进行图像处理

针对现场足迹的特点,在足迹自动识别系统原理的基础上,分析研究影响足迹图象质量的各种因素,并就这些不同原因,给出有效的足迹图象处理方法。结果表明,利用足迹自动识别系统对现场足迹进行处理,可以得到较高质量的足迹图象。同时,相比较其他图象处理方法,该方法简单、方便,具有较好实用性和可操作性,从而提高了现场足迹的利用率。     

中共在陕甘宁边区执政形象探析

中国共产党在陕甘宁边区掌握局部政权期间,以陕甘宁边区为“一切工作的试验区”,把合乎最广大人民群众的最大利益和为最广大人民群众所拥护作为价值坐标,推进民主政治建设,健全法制,建设廉洁政府,倡导深入实际、调查研究,领导人民发展经济、文化教育和医疗卫生事业,开展社会改造运动,塑造和展示出中共在陕甘宁边区执政的民主、廉洁、亲民、为民形象,给我们留下深刻启示。     

韩国古代诗歌的大唐影响——杜甫与李达诗中的“马”意象

韩国古代＂三唐诗人＂致力于学习中国唐诗,努力将自己的诗风与唐诗接近,在唐代诗人中,杜甫的诗成为他们学习和模仿的典范。李达与杜甫的人生遭际类似,一生处于社会底层,抑郁不得志,他的《柳摠戎紫骝马歌》是赠与知己友人柳珩的诗.表达了一个远离于主流社会的局外人的悲哀。他借鉴了杜甫诗中的＂马＂意象,但又有所不同。杜甫在自己的作品中,通过＂马＂的形象映射自己的理想和抱负,而李达的诗中只是以一个叙事者的身份状物抒情,没有达到杜甫的意象高度,李达虽然模仿了唐诗,但并没有完全悟透其中滋味。本文试图通过一个侧面,揭示韩国古代三唐诗人在接受中国唐代诗歌中的得失。     

Controversial Suicide Case Using a Submachine Gun with a Sound Suppressor—The Need of Team Work of Forensic Chemistry and Firearm Examiners

Evidence materials in a presumed suicide case were studied by a firearm examiner and a forensic chemist. The victim's body with double gunshot wounding in his forehead, a machine gun in the sustained fire mode with a silencer, and four cartridge cases were found. Examinations of the evidence, the case file studies, and experiments dedicated to the case were carried out. Relationships between the placement of cartridge cases and the gun were established using a fast camera. The distributions of gunshot residues on the evidence materials and within the comparative gunshot patterns were studied by means of optical and electron microscopy, X‐ray microanalysis, and infrared spectroscopy. The shooting distance was assessed to be 30 cm or more, whereas the greatest distance that could have been achieved by the victim himself was about 11–13 cm. The obtained results supported the version of homicide rather than suicide.     

Arts Organizations and Branding: Creating a New Joint Brand for Three Arts Organizations

This article investigates brand architecture by analyzing stakeholder perceptions of brand images when a new joint brand is created for the existing brands of three arts organizations. The theoretical framework is based on previous literature on brand architecture and brand image. The empirical study is based on a quantitative, 418-respondent survey among stakeholders of these three arts organizations. The study makes two major theoretical contributions. First, the results show that the new joint brand can be endorsed by the existing sub-brands, contrary to brand-architecture literature. Second, even in the case of a new brand, stakeholders perceive the functional attributes as important.     

Analysis and Discrimination of Single‐Layer White Architectural Paint Samples,

Comparative analyses of 50 single‐layer white architectural paints were conducted to determine the discrimination power using standard techniques and to provide a basis for assessing significance when paints with limited features are not discriminated. Utilizing Fourier transform infrared spectroscopy (FTIR), 68 undifferentiated pairs resulted, yielding a discrimination of 94.45%. Adding stereomicroscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and backscatter electron (BSE) imaging, and pyrolysis‐gas chromatography/mass spectrometry (Py‐GC/MS), the overall discrimination was 99.35%. The study included blind verification replicates, which resulted in the only pairs without indications of physical or chemical differences. The remaining groups of undifferentiated samples contained subtle differences by at least one technique, but were considered undifferentiated for the discrimination power evaluations. This study demonstrates a high degree of discrimination of single‐layer white architectural paints using methods of analysis often encountered in forensic science laboratories.