大陆与台湾经济周期的同步性实证研究

本文从典型相关的角度,通过对1990年以来的大陆与台湾经济周期的同步性的实证分析可知,当以GDP作为衡量指标时,大陆与台湾之间不仅在长期内存在共同趋势,在短期内两地区的产出也存在共同周期;当以投资、消费等经济指标作为衡量指标时,这两组经济指标之间的典型相关关系属于强相关,这充分说明大陆与台湾经济周期的同步程度是非常显著的。

斐波那契类LiNbO_3超晶格的二次谐波光双折射输出特性研究

本文在简介了 ＦＣ（ｎ）和按 ＦＣ（ｎ）序列排列的 ＬｉＮｂＯ３超晶格系统的结构特征之后，解析地推导了在小信号、平面波近似条件下，按 ＦＣ（ｎ）序列排列的 ＬｉＮｂＯ３超晶格系统二次谐波光的输出功率和转化效率公式，得出了 ＬｉＮｂＯ３晶体材料的上述系统寻常光的二次谐波输出光每单位面积的输出功率 Ｓ（２ω）对于基频光波长的关系，发现对于 ＬｉＮｂＯ３晶体材料而言，一定的铁电畴序列系统存在相应稳定调谐的寻常倍频光输出功率，在红外光区域存在四条转换效率很大的调谐谱线；非寻常倍频光也具有相似的结论，但调谐谱线的波长向可见光区域发生偏移而且转化效率较高的谱线有六条．另外，还讨论了上述铁电畴系统的二次谐波输出光谱线的两种有趣的缺级效应．

我国物价波动的内生机制分析——基于产出缺口的角度

文章首先回顾了我国改革开放以来的物价波动轨迹,得知近一二十年来我国价格波动的幅度和频率明显增加,而且在历次的价格波动中,固定资产投资仍然是物价波动的重要原因;其次从产出缺口的角度对我国物价波动的机制进行了实证分析,得知当产出缺口由负转正和由正转负时都伴随着物价的大起大落;最后对物价波动的内生机制进行了理论总括,即历次物价波动的物质技术基础是投资波动在乘数—加速数的作用下,投资、消费、国民收入相互作用,引起社会总供求的周期性变化,从而形成周而复始的物价波动。

浅谈大学物理教学改革——番禺学院机制专业教改体会谈

介绍了进行工科物理教学改革的三点尝试：通过和中学物理进行纵向类比掌握大学物理的新思维、新特点、新数学工具；通过模块式教学进行横向类比把握相关物质属性的规律的对称性；通过简介和工科物理相关知识密切联系的现代高技术，提高学生的物理学习兴趣，认清基础知识的重要性．

特殊斐波那契准晶量子电子谱结构探讨

本文利用单电子、紧束缚、最近邻座模型，在重整化群的基础上，用分解-消元法分析并计算了特殊二维斐波那契准晶的量子电子谱分裂规律。我们发现在一级近似下，三种原子只构成六种原子簇，相应的能谱按Y方式分裂成九支；在二级近似下，座模型转化成迁移模型，鼻子电子谱按F谱方式分裂。分析结果与数值计算值符合较好。

长沙“四小龙”县域经济跨越发展的启示

县域经济在国民经济中处于十分重要的地位。本文研究长沙"四小龙"县域经济发展的特点、思路、战略、路径和方法,总结其取得成果的因素。长沙"四小龙"县域经济发展的实践证明,地方政府只要战略明确,抢抓机遇,大胆创新,立足本地特色,统筹城乡发展,勇于竞争,善于合作,坚持走新型工业化道路;切实转变观念,优化环境,就一定能取得县域经济超常规跨越式的发展。同处于中西部其他地区县市既要善于走出去到沿海发达地区学习先进的经验,更要两眼向内,注意学习地理位置相近、经济结构相似的本地"领头羊"的高招,因为来自后者的经验,更契合中西部地区的实际,更有说服力,中西部地区在实现县域经济跨越发展上一定大有可为。

投资对CPI波动的传导机制研究

通过理论和实证分析可以发现,投资波动将会导致生产资料价格的变动、消费需求的变动、粮食供给的变动并加大对国际市场的依赖,最终传导到消费品市场引起CPI的波动。因此要保持C P I稳定就必须要熨平投资波动、促进投资持续稳定增长并提高投资质量。

关于对工科物理实验教学改革的思考

文章通过对现有工科物理实验教学中存在弊端的分析，提出了四点对工科物理实践改革的探讨意见。

定量差异及其在体育科学中的应用

统计方法可以告知两组数据的定性差异,而无法得出它们的定量差异。通过改进Fibonacci数列及其黄金分割常数τ=(5^(1/2)-1)/2≈0.618来度量差异。对于任何两个数的绝对值x和y(x<y),l级定量差异定义为l=|log_x(x<y)|。对于年龄,l<0.22、0.22≤l<0.44、0.44≤l<1.00和l≥1.00分别表示完全没有定量差异、稍许定量差异、显著定量差异和极显著定量差异。对于关键非必需功能、器官和整体层次l<0.27、0.27≤l<0.47、0.47≤l<0.80与l≥0.80和分子细胞层次l<0.47、0.47≤l<0.80、0.80≤l<1.27与l≥1.27分别表示完全没有定量差异、稍许定量差异、显著定量差异和极显著定量差异。讨论了定量差异在运动寿命、寿命和运动效应研究方面的初步应用。

油脂降解培养基优化的遗传算法实验研究

我们运用遗传算法 ,首次对利用热带假丝酵母降解油脂的培养基优化问题进行了研究。通过 5代实验完成了 5 0个实验样本、6种培养基成分、6 4个浓度水平的优化任务。按照优化后的培养基组成 ,热带假丝酵母降解油脂的降解率为 95 .4 % ,比正交设计法提高了 7.6 3%。实验结果表明 :利用遗传算法可优化培养基成分含量 ,取得更好的效果 ;遗传算法是一种优于单因素试验法和正交设计法的新型、高效的培养基优化方法。

新时期高校科研型党支部建设探讨

近年来,随着经济体制的改革和社会主义市场经济的逐步确立,我国社会生活正发生着复杂而深刻的变化,高校党建也面临新的问题和挑战。本文对高校科研型党支部建设的意义、所面临的问题、应处理好的关系等进行了初步探讨,提出了新时期加强高校科研型党支部建设的有效途径。

Singular optical propagation properties of two types of one-dimensional anti-PT-symmetric periodic ring optical waveguide networks

Two types of one-dimensional(1D)anti-PT-symmetric periodic ring optical waveguide networks,consisting of gain and loss materials,are constructed.The singular optical propagation properties of these networks are investigated.The results show that the system composed of gain materials exhibits characteristics of ultra-strong transmission and bidirectional reflection.Conversely,the system composed of loss materials demonstrates equal transmittance and reflectance at some frequencies.In both the systems,a new type of total reflection phenomenon is observed.When the imaginary part of the refractive indices of waveguide segments is smaller than 10-5,the system shows bidirectional transparency with the transmittance tending to be 1 and reflectivity to be smaller than 10-8 at some bands.When the refractive indices of the waveguide segments are real,the system will be bidirectional transparent at the full band.These findings may deepen the understanding of anti-PT-symmetric optical systems and optical waveguide networks,and possess potential applications in efficient optical energy storage,ultra-sensitive optical filters,ultra-sensitive all-optical switches,integrated optical chips,stealth physics,and so on.

四种非周期光学超晶格薄膜系统光透率研究

利用电场理论和传输矩阵方法,研究了光在Fibonacci类、广义Fibonacci、广义Thue-Morse、广义三元模型光学超晶格薄膜系统中的透射性质,发现了多种有趣的循环性质、开关性质和多稳态性质,为光开关、光存储、多通道光学滤波器等光学器件的设计提供了理论指导。

高职高专国贸专业开展双语教学的障碍及解决对策

作为一门与国际接轨的前沿学科,国际贸易专业开设双语教学正是适应了时代需要,对培养高素质的外向型人才和提高教师素质具有非常重要的现实意义。国际贸易专业双语教学一方面对我们国际贸易专业教师双语教学提出了更高的要求,另一方面国际贸易专业双语教学是一项系统工程,需要方方面面的配合,要求高校加强师资建设的同时,营造适宜的双语教学环境、加快双语教材的选编工作及探索新的教学模式和手段等。

Propagation of Airy Gaussian vortex beams in uniaxial crystals

The propagation dynamics of the Airy Gaussian vortex beams in uniaxial crystals orthogonal to the optical axis has been investigated analytically and numerically. The propagation expression of the beams has been obtained. The propagation features of the Airy Gaussian vortex beams are shown with changes of the distribution factor and the ratio of the extraordinary refractive index to the ordinary refractive index. The correlations between the ratio and the maximum intensity value during the propagation, and its appearing distance have been investigated.

Extraordinary transmission and reflection in PT-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios

By adjusting the waveguide length ratio, we study the extraordinary characteristics of electromagnetic waves propagating in one-dimensional(1D) parity-time-symmetric(PT-symmetric) two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios respectively. It is found that the number and the corresponding frequencies of the extremum spontaneous PT-symmetric breaking points are dependent on the waveguide length ratio. Near the extremum breaking points, ultrastrong extraordinary transmissions are created and the maximal can arrive at, respectively, 2.4079 × 10^14 and 4.3555 × 10^13 in both kinds of networks. However, bidirectional invisibility can only be produced by the networks with broken integer waveguide length ratio, whose mechanism is explained in detail from the perspective of photonic band structure. The findings of this work can be useful optical characteristic control in the fabrication of PT-symmetric optical waveguide networks, which possesses great potential in designing optical amplifiers,optical energy saver devices, and special optical filters.

Band rules for the frequency spectra of three kinds of aperiodic photonic crystals with negative refractive index materials

By means of the theory of electromagnetic wave propagation and transfer matrix method, this paper investigates the band rules for the frequency spectra of three kinds of one-dimensional （1D） aperiodic photonic crystals （PCs）, generalized Fibonacci GF（p, 1）, GF（1,2）, and Thue Morse （TM） PCs, with negative refractive index （NRI） materials. It is found that all of these PCs can open a broad zero-n gap, TM PC possesses the largest zero-n gap, and with the increase of p, the width of the zero-n gap for GF（p, 1） PC becomes smaller. This characteristic is caused by the symmetry of the system and the open position of the zero-n gap. It is found that for GF（p, 1） PCs, the possible limit zero-n gaps open at lower frequencies with the increase of p, but for GF（1,2） and TM PCs, their limit zero-n gaps open at the same frequency. Additionally, for the tbree bottom-bands, we find the interesting perfect self-similarities of the evolution structures with the increase of generation, and obtain the corresponding subband-number formulae. Based on 11 types of evolving manners Qi （i = 1, 2,... , 11） one can plot out the detailed evolution structures of the three kinds of aperiodic PCs for any generation.

Photonic band structures of quadrangular multiconnected networks

By means of the network equation and generalized dimensionless Floquet-Bloch theorem, this paper investigates the properties of the band number and width for quadrangular multiconnected networks （QMNs） with a different number of connected waveguide segments （NCWSs） and various matching ratio of waveguide length （MRWL）. It is found that all photonic bands are wide bands when the MRWL is integer. If the integer attribute of MRWL is broken, narrow bands will be created from the wide band near the centre of band structure. For two-segment-connected networks and three-segment-connected networks, it obtains a series of formulae of the band number and width. On the other hand, it proposes a so-called concept of two-segment-connected quantum subsystem and uses it to discuss the complexity of the band structures of QMNs. Based on these formulae, one can dominate the number, width and position of photonic bands within designed frequencies by adjusting the NCWS and MRWL. There would be potential applications for designing optical switches, optical narrow-band filters, dense wavelength-division-multiplexing devices and other correlative waveguide network devices.

Influence of Deviation on Optical Transmission through Aperiodic Superlattices

We propose a deviation model and study the influences of the relative error and sensitivity of a machine on the transmission coefficients （TCs） of Fibonacci superlattices. It is found that for a system with fewer layers, the influence of deviation can be ignored. When superlattices become more complicated, they may be fabricated by a machine with suitable relative error and possess the designed value of TO. However, when the number of system layers exceeds some critical value, superlattices should be manufactured only by precise machines. The influence of the sensitivity is also discussed.