适用于波分复用器的高性能滤光片设计

本文讨论了适用于波分复用器的高性能滤光片设计方法.所设计的滤光片通带透射率大于99.98%,阻带反射率也大于99.99%.同时还发现,截止滤光片的膜层厚度灵敏度较小,带通滤光片的膜层厚度灵敏度较大.因此,应将带通滤光片的膜层误差控制在1%以内.由于偏振的影响,入射角应小于15°.     

液晶可调谐滤光片的透射光谱分析

采用琼斯矩阵方法对不同结构的液晶滤光片的透射光谱进行了分析。结果表明,该种滤光片调谐范围宽;平行向列相液晶法-珀滤光片具有偏振敏感性;电压较高时,90°扭曲向列相液晶法-珀滤光片的偏振敏感性消除。     

4416A负滤光片

4416A负滤光片是为提高FYJ-3型CO_2激光治疗仪诊断肿瘤的准确度而研制的一种滤光片。本文阐述了负滤光片的设计理论、膜系设计、制备工艺,并对测量结果作了讨论。     

多级可调谐液晶滤光片的设计

针对外加电压和液晶盒厚度的不同配置,结合具体设计实例,对多级利奥型液晶可调谐滤光片设计参量的选取和优化进行了讨论.在此基础上,将液晶和方解石晶体相结合,采用宽视场的设计方法,设计了四级液晶利奥滤光片.这种滤光片设计自由度大,可以在短时间内实现光谱的连续调谐.     

四分之一膜堆非等厚干涉滤光片的设计

本文讨论了由两个四分之一的多层膜堆包围一个间隔层结构的非等厚干涉滤光片系统的设计方法,并在此基础上给出了干涉滤光片的设计实例。此种滤光片无论在高透射的通带特性方面,还是在高反射的截止带特性方面都优越于通常的四分之一膜堆等厚干涉滤光片的特性,并且与非四分之一膜堆干涉滤光片相比,该种滤光片在工艺上是很容易实现的。     

液晶利奥滤光片光学特性的数值分析

从液晶的电光效应和传统晶体利奥滤光片的原理入手,分析了液晶利奥可调谐滤光片的结构和原理.介绍了描述这种滤光片光学特性的琼斯矩阵方法.应用数值方法对这种滤光片的透射比、半峰全宽、自由光谱范围等光学特性进行了讨论,并对设计中各级滤光片厚度与电压的不同配置进行了简单介绍.     

生物荧光激发滤光片及栅滤光片的研制

本文论述生物荧光激发滤片及栅滤光片的膜系设计，压缩滤光片通带的新方法以及制备滤光片所采取的工艺措施。     

一种长波红外宽光谱长波通滤光片的优化设计

长波红外宽光谱长波通滤光片是光谱成像技术中重要的光学元件。论述了设计长波红外宽光谱长波通滤光片的设计原则和方法,并对这种长波红外宽光谱长波通滤光片优化设计进行了研究。根据等效折射率理论,以周期性对称膜系为基础,使用压缩透射区内波纹幅度的部分膜层优化方法,设计了满足性能指标要求的长波红外长波通滤光片。经过优化,所设计的长波红外宽光谱长波通滤光片,高透射波段内平均透射率大于90%,最低透射率高于85%;截止波段内平均透射率小于1%,最高透射率低于5%。研究表明,用部分膜层优化方法设计的膜系,膜层结构简单,有利于膜层厚度的监控,既能克服全自动优化方法给工艺上带来的困难,又弥补了解析法设计膜系时不能调整光谱特性的不足。     

通道位置可独立调整的三通道滤光片设计

通过对Fabry-Perot滤光片性质的研究，以及Fabry-Perot滤光片中缺陷层厚度变化对通道数目、位置影响的分析，引入三对称结构，通过改变三对称结构中对应的缺陷层厚度来实现通道位置可独立调整的三通道滤光片．设计过程中采用有效界面法对通道位置进行初步计算，并通过计算机理论模拟对膜层进行修正使得通道位置满足设计要求．设计结果表明，通过调整3个厚度参数可以克服Fabry-Perot滤光片中通道的相互干扰现象，从而实现了各通道位置的独立调整．     

三元组合双折射滤光片优化设计

介绍一种利用单轴晶体的双折射效应及偏光干涉原理设计的三元组合的石英晶体双折射滤光片．给出了双折射滤光片的滤光原理，并分析它的参数特性．通过实验给出了三元组合双折射滤光片的透射曲线，其透射光谱带宽较窄，次峰被抑制在10％以下．用在脉冲激光器中时，具有450nm宽调谐范围．在设计时采用了法布里玻罗来压窄线宽，达到5nm以下．     

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.     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.