Zn0.77Cd0.23Se量子点溶液显现手印应用研究

目的显现不同客体表面潜手印。方法以巯基丙酸(MPA)为修饰剂合成了水溶性荧光量子点Zn0.77Cd0.23Se溶液,并用此溶液对手印进行显现。考察了适宜显现的客体范围,同时对不同客体上的遗留手印进行了批量显现与统计分析;进一步对胶带上的手印进行了显现并与常规方法相比较。结果制备得到的材料能较好地显现不同客体表面潜手印。结论该方法具有背景污染小、显现陈旧手印能力强的优势。     

悬浮液法显现手印的适用性初探

实验采用群青、翠绿、氧化锌、二氧化钛和二硫化钼等粉末,按照不同配方配制了5种悬浮液,以此为基础研究了悬浮液显现法在常见承痕客体种类、手印物质种类和潮湿物面上手印显现等方面的适用性。结果表明：悬浮液显现法具有试剂性质稳定、显现手印迅速和显现后手印物质无污染的特点;二硫化钼、群青、翠绿、氧化锌和二氧化钛5种悬浮液对瓷砖和地板革客体上的常见物质种类手印显现效果好;对常见潮湿客体上汗潜手印的显现效果较好。     

物理显影液显现汗潜、血潜手印研究

目的进一步深入研究物理显影液对于显现汗潜、血潜手印的适用性。方法通过对比茚三酮显现汗潜指纹、四甲基联苯胺显现血潜指纹,对茚三酮、四甲基联苯胺不能显现或显现不清晰的手印客体,物理显影液可以进行显现。结果物理显影液显现出的手印纹线清晰、连贯,且物理显影液与茚三酮在显现汗潜手印方法之间具有补充性,提高了手印的显现率。结论物理显影液可以有效地显现出不同渗透客体表面和非渗透性客体表面上的汗潜手印和血潜手印。     

DFO显现潜在手印研究进展

1,8-二氮杂芴-9-酮(DFO)是一种优良的氨基酸及多肽荧光测试剂,现已广泛应用于国外的手印显现工作之中。DFO可以有效显现出渗透性客体上多种中介物质的潜在手印,特别适合显现复杂背景上的汗潜手印和深色客体上的血潜手印。综述近年来DFO显现法在法庭科学领域中的研究进展并对这一传统显现方法未来的研究方向加以展望。     

浅色调小颗粒悬浮液显现汗潜手印的比较研究

目的:依据实验筛选出可用于汗潜手印显现的浅色调小颗粒悬浮液,得出最佳配方,并对它们在显现手印适用性方面的区别进行比较,为实践中该方法的应用提供可靠的依据。方法:采用单因素实验法和手印显现效果观察法、比较法筛选小颗粒,确定悬浮液的最佳配方及其显现手印的适用性。结果:钛白粉、氧化锌两种浅色调小颗粒悬浮液不仅可用于汗潜手印的显现,还可用于油潜、蛋白、血潜手印的显现,对于光滑非渗透性客体、半渗透性客体和个别渗透性客体上的上述手印都有很好的显现效果。结论:氧化锌、钛白粉两种浅色调悬浮液对手印的显现各有优势,可依现场手印遗留情况选择使用。     

酸性红94显现潮湿非渗透性客体表面潜在手印应用研究

潮湿客体表面潜在手印的显现是物证检验鉴定过程中所面临的一大难题,利用无毒害的生物染色试剂酸性红94结合相转移催化剂对潮湿客体表面潜在手印进行了显现研究。通过大量样本实验考察了显现试剂的最佳配方、最佳适用条件、灵敏度以及不同客体、不同浸泡时间对显现效果的影响。实验结果表明,该方法灵敏度高,显现手印纹线清晰连贯、与背景反差明显。当酸性红94浓度为5 mmol/L时,其显现效果最佳,对于水中浸泡50小时以上的客体仍然能表现出良好的显现效果。     

合成新型CuCr_2O_4黑色纳米粉末快速显现潜手印研究

目的建立使用新型CuCr_2O_4黑色纳米粉末快速显现现场潜手印的方法。方法使用柠檬酸溶胶―凝胶法制备粒径约为50 nm的CuCr_2O_4黑色粉末,再利用扫描电镜-能谱仪(SEM-EDS)、X射线衍射(XRD)对该显现粉末进行表征,发现其为尖晶石型球状颗粒,纯度高,粒径基本均一。经用粉末刷显法和小颗粒悬浮液法对不同性质客体上的较陈旧汗潜手印、血潜手印进行显现。结果 CuCr_2O_4黑色纳米粉末与手印物质结合紧密,显现较陈旧汗油手印、血潜手印纹线清晰、连贯。结论 CuCr_2O_4黑色纳米粉末制备方法简单,操作简便,可有效显现渗透及非渗透性浅色客体上的汗潜、血潜手印,为现场手印的粉末显现法提供新思路。     

二氧化钛显现深色客体表面的血潜手印的研究

传统的显现方法对深色客体表面血潜手印不是无效就是操作次序繁琐,不适于犯罪现场的潜在手印的显现和提取。二氧化钛乙醇溶液能够有效地显现出深色客体表面的血潜手印,显现出的手印纹线为白色,纹线清晰连贯,不会发生纹线扩散现象,很容易拍照固定。     

高真空镀膜与“502”熏显组合方法显现手印研究

目的通过对高真空镀膜方法和"502"方法显现手印的组合方法研究,得出常见客体上使用两种方法显现手印的最佳显现方案。方法对常见客体上手印进行"502"和高真空镀膜两种方法的独立显现和组合显现,取得常见客体上手印显现的优化方案。结果取得了几种客体上手印的"502"和高真空镀膜两种方法组合显现的较优方案。结论研究对案件现场可提取物品上潜在手印的显现具有较大参考价值。     

常见纸张类渗透性客体上遗留汗潜手印最佳显现方法研究

目的:探索有效的显现常见纸张类渗透性客体上汗潜手印的方法.方法:本文以白纸、报纸、画报纸、牛皮纸上遗留的汗潜手印样本为研究对象,分别用DFO显现技术、茚三酮显现技术、物理显影液显现技术、硝酸银显现技术和茚二酮显现技术对汗潜手印进行显现.结果:通过比较不同渗透性客体上遗留汗潜手印的显现效果,得出茚二酮显现技术是显现白纸、画报纸和报纸等渗透性客体上遗留汗潜手印显现的最优方法,对于牛皮纸类渗透性客体上遗留的汗潜手印最优方法是使用茚三酮.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that