多孔窗制冷性能的计算分析

定义了多孔窗空调的有效和无效制冷量，确定了多孔窗制冷的效率与效能计算方法和多种性能指标，在不同的环境参数和结构参数下，对多孔窗制进行了比较全面的性能计算，通过对数值计算结果的分析，讨论了多孔窗的优化运行条件，提出了改进制冷性能的途径和措施。     

基于滚动模糊时间窗的场面动态路径规划

为了减少机场场面滑行冲突,提高机场运行效率,提出了一种基于模糊规则系统的滚动模糊时间窗算法。首先构建机场滑行时间预测模型,其次将滚动时间窗和模糊时间窗算法相结合,对滑行路径进行动态优化,最后结合机场地面滑行数据进行检验,结果表明,地面延误降低了9%-17%,地面冲突减少了10%-18%,说明该方法能够有效提高机场地面运行效率。     

基于滚动时间窗的最小二乘支持向量机回归估计方法及仿真

提出了一种基于滚动时间窗的最小二乘支持向量机(LSSVM)回归估计方法．该方法构造了滚动时间窗，利用滚动时间窗内的数据优化建模．模型随着时间窗的滚动进行在线更新，并对滚动时间窗内的数据分配不同的权值以充分利用数据的信息．将基于滚动时间窗的LSSVM回归估计方法应用于软测量建模．进行轻柴油凝固点的预估．结果表明，该建模方法十分有效．     

数字信号处理中的窗效应及窗函数的应用原则

讨论了数字信号处理中因数据的截短而引起的窗效时谱估计和数字滤波器设计的影响，提出了合理使用窗函数的原则。     

一种加窗数据降维方法在食品品质分析中的应用

加窗处理方法是在应用近红外光谱分析技术对食品品质进行分析、建立数学预测模型的过程中，选用适当窗函数对原始光谱数据施行降维、降噪等操作，从而节约计算机内存、减少运算量，并提高模型的预报精度。对大米近红外光谱数据，分别采用不加窗处理和加窗处理措施建立了大米蛋白质含量的预测模型。经实验，该方法能有效地压缩原始数据、降低噪声影响，明显地缩短了计算机的运行时间，使模型评价指标如平均相对误差、平均偏差和预测标准差有所降低，使预测值和化学参比值的相关系数(R^2)由0．9204提高到0．9526。     

PowerBuilder应用开发系统中的动态数据窗技术

文章介绍了在ＰｏｗｅｒＢｕｉｌｄｅｒ应用开发系统中的动态数据窗技术的实现过程及应用等，该数据窗技术主要功能是在打印一个报表，特别是单证的套打时，实现在程序运行中调整报表中的一些字段的位置、字体、大小，及隐藏某个字段，并可调整整个数据区各数据的位置。     

加 窗 时 空 分 析 法 实 现 三 维 测 量

分析了传统时空分析法空间和时间成本，发现过多无效数据的处理是导致计算效率低下的原因，提出了加窗时空分析法.该方法通过对时间序列的数据进行加窗截取，缩小了数据计算范围，从而减轻了内存负担，提高了计算效率.同时，小窗口的浮动特性使得延迟计算时间缩小到1/2窗口值，并且可实现随着图像的获取进行逐帧计算.对3个实验物体进行三维测量，曲面实验结果精细正确.在与传统时空分析法的定量比较中，该方法结果与传统方法结果在距离阈值10-6下的正确率和回调率高达99.8%，且计算时间仅为传统方法的2%.因此，加窗时空分析法使用较小的计算成本实现了高质量的计算结果.     

380 D高速列车侧窗玻璃风压和疲劳性能试验与研究

该文描述了380 d型动车组侧窗抗风压和疲劳性能,由试验得到侧窗的挠度数值,气密性能,露点数据及侧窗外侧玻璃破坏情况试验.分析了侧窗侧窗窗框和密封胶的抗载荷性能,未高速列车侧窗的结构优化提供了设计依据.     

一种新颖的超宽带自参考发射接收方案

针对发射参考超宽带系统的低资源利用率和相关模板易受噪声干扰的缺点，提出一种新的自参考发射接收方案和基于此方案的广义似然比检验分组判决算法．所提方案利用部分重叠窗检测结构，将已判决符号的接收信号作为参考，省去了参考信号占用的能量与时间资源，达到了满数据发送速率；引入差分编码解决了重叠窗带来的误码传播问题．分组判决算法利用检测窗内所有数据帧，在广义似然比准则下对相关模板进行联合估计，进一步压制了模板噪声．仿真结果表明，与传统发射参考以及其他发射参考方案相比，该自参考方案及其检测算法在广义信噪比下能提供更好的误码性能．     

电网调度自动化系统中网络流量的小波分析应用研究

为了保障电网调度自动化系统中的业务正常运行,电网调度自动化系统中网络流量的异常检测至关重要。本文提出了一种基于滑动时窗的小波变换网络流量异常检测算法。该算法通过对网络流量数据进行Haar小波变换,获得细节信号,利用正态分布的法则判断是否存在异常。通过将算法实际应用于贵州电网调度自动化运行管控系统,针对系统中所监控的正向隔离装置网络流量数据进行实时分析,证实了算法的正确性和可行性。     

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.     

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.     

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     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has