课堂言语互动中的会话修正分析

运用会话修正理论对大学英语课堂言语互动中的协商、提问、反馈中的会话修正类型、修正方式、修正的数量和比例及其对学生口语输出的影响进行定性和定量分析,发现:从修正的类型来看,语言形式修正最多,内容修正和意义修正相对缺乏;言语互动的发生率不高且互动中的修正大多由教师而不是学生发起;自我启动自我修正、他人启动自我修正方式有助于学生产生更多的修正后的可理解性输出。     

涡旋型线齿头修正的参数分析优化

针对涡旋型线齿头的参数优化选取,以双圆弧修正和双圆弧加直线修正两种涡旋型线齿头修正为例,推导了两种修正的几何模型,建立了修正齿齿形参数和修正齿面积的数学模型,分析了实现两种修正所需要的初始参数,并讨论了修正齿参数和修正齿面积随各初始参数变化时的变化趋势;以修正齿面积和修正面积系数为优化目标,采用多目标遗传算法对两种修正中各参数不同组合时的选取进行了优化,得到了各参数的一组非劣解集.结果表明该模型可为双圆弧修正和双圆弧加直线修正的初始参数的选取提供参考.     

基于神经网络的叶片电解加工阴极修正仿真

工具阴极的精确设计与修正是电解加工的研究难点之一.文中采用人工神经网络技术,建立了基于改进BP神经网络的数字化阴极修正模型.利用该模型对阴极型面进行数字化修正,改变传统人工修正的方法,提高了阴极修正效率.文中还以多次阴极修正数据为基础,对型面修正量进行了预测.结果表明,该网络模型预测的阴极修正量与试验修正量比较接近,最大绝对误差在0.015mm左右,证明其具有较好的预测效果.该网络模型能广泛应用于航空发动机叶片等复杂型面阴极的数字化修正,减少修正次数,缩短阴极修正周期,提高叶片电解加工精度.     

基于神经网络的叶片电解加工阴极修正模型及其仿真

工具阴极的精确设计与修正是电解加工研究难点之一。采用人工神经网络技术,建立了基于改进BP神经网络的数字化阴极修正模型。通过模型对阴极型面进行了数字化修正,改变传统人工修正的方法,提高阴极修正效率。以多次阴极修正数据为基础,对型面修正量进行预测。结果表明：网络模型预测的阴极修正量与试验修正量比较接近,最大绝对误差在0.015mm左右,证明网络模型具有较好的预测效果。该网络模型能广泛应用于航空发动机叶片等复杂型面阴极的数字化修正,减少修正次数,缩短阴极修正周期,提高叶片电解加工精度。     

一种形式化知识库更新方法--修正程序

本文在逻辑程序的理论基础上引入一种规范知识库更新的形式化方法-修正程序，它允许使用逻辑程序的说明性语义和强制性语义来解释修正规则，但用来解释修正程序将会变得非常困难，本文将引入修正程序的语义模型-P-合理修正，并讨论了修正程序同逻辑程序的关系及修正程序的现实意义。     

摆线齿轮最佳复合修正齿形的研究

对摆线齿轮现有修正方式和修正量的分析研究，揭示了等距，移距修正的实质是使齿形发生鼓形变化，得出了合理的摆线轮齿形修正方式和修正量为零到一定范围内的鼓形修正；提出了对摆线齿廊进行分段最佳复合修正的新修正方法，该方法修正齿形具有同时传力齿数最多，各受力齿测隙一致，，承载均匀，，便于数控加工和允许成形滚轮磨损量大等特点。     

脉冲火箭弹模型仿真

通过对脉冲修正力的研究,建立了使用末段脉冲修正的制导火箭弹的空间质心运动方程和旋转运动方程,并通过计算机仿真证明了此模型的可行性,得出以下规律:(1)修正距离随着修正力大小的增加而不断增加,当力的大小为5 000 N时修正距离最大;(2)修正距离随着修正力作用点与质心的距离的增加而增加,当距离为0.5 m时修正距离最大。     

集成D/A电路自动修正的算法

一、引言十位以上的高精度D/A,A/D单片集成电路已难以直接由工艺过程来得到保证,通常都要利用激光来进行自动修正.这里除了要有精密定位和聚焦的激光修正设备外,还需要有自动控制的算法软件才能根据具体的电路进行自动修正,也就是要依据电路输出的误差,在保证元件的修正为单方向不可逆的条件下,确定应该修正的元件,并估算出修正量,从而控制激光修正设备进行自动修正.虽然关于滤波器的自动修正方法已有所     

一维弹道修正引信弹道修正策略分析

针对一维弹道修正引信阻力机构增阻能力有限的问题,采用概率与数理统计方法,以落入指定幅员区域弹丸数量最多为原则,对一维弹道修正弹药所需提前瞄准量、最大射程修正量进行分析. 研究结果表明,采用只对部分弹丸进行修正,提前瞄准量是所需最大射程修正量的1/2,且为无修正弹丸落点纵向误差标准差2倍左右时,修正策略为最佳选择. 以某155 mm榴弹对象,进行蒙特卡洛打靶仿真分析,验证了该修正策略的正确性. 该修正策略能以较小的提前瞄准量及所需最大射程修正量,使射程精度得到最大程度的改善,特别适用于阻力机构增阻能力有限的一维弹道修正引信.      

基于子结构分析的多重子步模型修正方法

为了解决模型修正过程中修正目标众多和测量信息有限的矛盾，提出了多重子步模型修正方法(MSMUM)，先进行误差定位，再实现参数修正，把复杂的模型修正过程分步实现。利用子结构技术，使结构模型在整体上仅包含有限数目的子结构，对各子结构所对应的超级单元的刚度参与系数进行识别来实现误差定位，通过建立测量信息与待修正参数间的代数方程来修正误差定位后子结构内部构件的参数。数值算例表明，建立的模型修正方法有效可靠。利用建立的多重子步模型修正方法对润扬大桥南汊悬索桥桥塔模型进行了修正。     

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.