Kerr介质中级联型三能级原子与压缩相干光场相互作用系统的粒子布居几率

利用相互作用绘景，采用完全量子化理论，研究了充满Kerr介质的高Q腔中级联型三能级原子与压缩相干态光场相互作用系统粒子布居几率的时间演化规律；讨论了Kerr介质强度系数、光场压缩因子和光场相干振幅分量模平方对粒子布居几率的影响，结果发现：Kerr介质强度系、光场压缩因子和光扬相干振幅分量模平方都直接影响了粒子布局几率演化曲线的量子崩塌－复苏的周期性和Rabi振荡频率，而非线性的Kerr介质的存在会削弱光场与原子的相互作用；当场与原子的初始相互作用和Kerr效应增加到一定程度时，都会导致光场与原子的关联程度逐渐减弱直到至退耦。     

混合态二能级原子双光子过程中辐射场的压缩效应

该文采用时间演化算符方法和数值计算,研究了相干光场与混合态二能级原子相互作用双光子过程中辐射场的压缩效应．结果表明：原子初始所处的混合态对辐射场的压缩性质影响较大,压缩只出现在初始布居几率紧靠激发态和基态的非常有限的范围内．     

非旋波近似下受激三能级原子粒子布居几率的演化

该文研究了非旋波近似下级联型三能级原子与单模相干态光场相互系统粒子布居几率的时间演化规律；讨论了初始场的平均光子数n^-（初始场强），原子－光场的耕合系数λ和光场频率ω对粒子布居几率的影响，比较了在相同的初始场强n^-下，旋波近似与非旋波近似下粒子布居几率演化曲线的差异，结果表明：非旋波近似下，由于虚光子过程的影响，受激辐射场粒子布居几率的演化曲线出现了“小锯齿状”，表现为系统的量子噪声，随着光场频率ω的增大，系统的量子噪声将逐步减小，直至消失，而随着初始场强n^-的增大，系统的量子噪声逐渐增大，同时，初始场强n^-和原子－场的耦合系数λ还影响了受激辐射场粒子布居几率演化的曲线量子崩塌－复苏的周期。     

依赖强度耦合双光子T-C模型原子布居数的时间演化

研究了依赖强度耦合压缩真空场与耦合双原子双光子跃迁相互作用系统原子布居数的时间演化规律,讨论了光场的初始压缩因子、原子间相互作用和原子的初态对原子布居数时间演化的影响。结果表明：当原子间相互作用较弱时,原子布居的时间演化曲线呈现周期性的崩塌-回复现象,随着原子间相互作用的加强,崩塌-回复周期变短,以至消失,原子布居时间演化曲线的振荡幅度随光场初始压缩因子的增大而明显地减小。     

二能级系统中粒子布居几率振荡的布洛赫矢量分析

考虑系统粒子的弛豫,利用密度矩阵运动方程,研究了线性啁啾脉冲作用下二能级系统的粒子布居几率随时间的演化情况,并在布洛赫矢量模型表象下,通过布洛赫矢量的动态演化过程分析了粒子相干布居转移过程中布居振荡的物理机理.结果表明,粒子数振荡反映的是二能级原子系统中粒子布居转移、色散和吸收三者之间的动态转化过程.     

啁啾场作用下二能级原子跃迁的时域动态变化分析

运用密度矩阵运动方程,分析了啁啾脉冲光场作用下二能级原子系统跃迁随时间的变化过程,并利用布洛赫矢量模型方法对其演化过程进行了动态分析.结果表明,啁啾效应使系统粒子布居几率出现振荡.布洛赫矢量演化过程表明,粒子布居几率的这种振荡,反映了系统粒子数转移、色散和吸收三者之间动态变化的物理过程.     

双光子共振三光子电离能级间耦合对电离的影响

应用分波展开法,通过电离态上的粒子布居,研究了电离相干现象.同时考虑到精细结构中分裂能级间的相互作用,采用nπ脉冲(n取整数或半整数),给出了电离态上粒子布居的数值模拟结果.并采用近似处理办法,得到了电离态上粒子布居受相互作用影响的解析表达形式.结果表明,双通道电离过程中不仅有两列波间的干涉,而且存在耦合作用对电离的调制.     

在有压缩真空注入的腔中Λ型三能级原子的稳态粒子布居

用主方程方法研究了有压缩光入射的腔中受激光场驱动的Λ型三能级原子的稳态行为，在劣质腔近似下讨论了原子的稳态粒子布居值的特点．发现腔的作用降低了压缩真空中的双光子关联；原子的相干跃迁速率和压缩真空的位相对原子的稳态粒子布居有很大影响．     

强啁啾超短激光脉冲实现粒子布居的调控

采用光与物质相互作用的半经典理论方案,建立了含啁啾相位项的修正光学 Bloch 方程,并采用高精度的、快速和可靠的、修正的四阶龙格-库塔法数值求解了该方程。通过数值计算,研究了强啁啾超短激光脉冲与二能级体系的相互作用。研究结果表明,啁啾量、入射脉冲面积、脉冲宽度、失谐量都对粒子布居产生明显的调制作用,论文还研究了激光脉冲各参数对粒子布居的调控规律,由此可以通过调节强啁啾超短激光脉冲的各参数来实现对粒子布居的调控。     

在有压缩真空注入的腔中∧型三能级原子的稳态粒子布居

用主方程方法研究了有压缩光入射的腔中受激光场驱动的∧型三能级原子的稳态行为，在劣持腔近似下讨论了原子的稳态粒子布成值的特点，发现腔的作用降低了压缩真空中的双光子关联，原子的相干跃迁速率和压缩真空的位相对原子的稳态粒子布居有很大影响。     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.