A novel binary effective medium model to describe the prepeak stressstrain relationship of combined bodies of rock-like material and rock

Combined bodies of rock-like material and rock are widely encountered in geotechnical engineering,such as tunnels and mines.The existing theoretical models describing the stress-strain relationship of a combined body lack a binary feature.Based on effective medium theory,this paper presents the governing equation of the“elastic modulus”for combined and single bodies under triaxial compressive tests.A binary effective medium model is then established.Based on the compressive experiment of concretegranite combined bodies,the feasibility of determining the stress threshold based on crack axial strain is discussed,and the model is verified.The model is further extended to coal-rock combined bodies of more diverse types,and the variation laws of the compressive mechanical parameters are then discussed.The results show that the fitting accuracy of the model with the experimental curves of the concretegranite combined bodies and various types of coal-rock combined bodies are over 95%.The crack axial strain method can replace the crack volumetric strain method,which clarifies the physical meanings of the model parameters.The variation laws of matrix parameters and crack parameters are discussed in depth and are expected to be more widely used in geotechnical engineering.

基于改进D-S证据理论的相控阵雷达作战效能评估

针对相控阵雷达作战效能评估中战场环境等不确定因素的影响,采用改进Dempster-Shafer(D-S)证据理论对其进行作战效能评估方法的优化。首先,通过构建相控阵雷达作战效能评估指标体系,明确评估指标并赋值权。其次,引入Kulsinski差异和模糊熵方法,对传统的D-S证据理论进行改进,减少指标在融合过程中的融合权重不确定性的影响。最后,通过改进D-S证据理论对评估指标进行数据融合,建立评估准确性较高的相控阵雷达作战效能评估模型。通过算例验证分析,所提方法能够有效减少融合过程中的不确定性影响,可实现相控阵雷达作战效能评估的目的,提高作战效能评估精度。

Relevance Theory-based Cognitive Study on the Communication Effect of “China's Stories”

Telling the story of China and transmitting the voice of China has become a strategy to promote the national image and cultural soft power of China. Since its implementation in 2013, China has ushered in a significant change in communication ideas and approaches. This strategy also enriches the communication genres of "China's stories" and more importantly enhances its communication effect. In this context, it is necessary to understand and study the significance of this strategic practice, assess the value realization of "China's stories" during the communication process, and thereby establish a basis for future communication of more "China's stories." Based on the factors of relevance theory, this paper analyzes the ideas of and approaches to effective communication of "China's stories" and proposes corresponding strategies.

ELECTRIC FIELD EFFECTS ON YOUNG'S MOLULUS OF NANOWIRES

As an important component of nanodevices and nanomachine constructions, the mechanical performance of nanowires （NWs） has been a subject of intense research efforts due to gaining relevance in controlling functionality of nanoelectromechanical systems （NEMS）; meanwhile, one of the characteristics of the NEMS is the dependence of the functionality of the systems upon the applied electric field. The study of the electric effects on the Young＇s modulus of nanostructures is of certain usefulness in the design of NEMS and the precise measurement of mechanical properties of one-dimensional nanostructures. This paper reviews the origin of the size-dependence of the elastic property of NWs and the factors influencing the discrepancies and inconsistencies in the measured values of the Young＇s modulus for the NW, besides the surface effects, nonlinear effects, the electromechanical coupling effects as a possible effect responsible for the differences in quantitative and qualitative performance of the measured Young＇s modulus for the NWs versus the diameter are clarified.

First-principles investigation of electronic structure,effective carrier masses, and optical properties of ferromagnetic semiconductor CdCr_2S_4

The electronic structures, the effective masses, and optical properties of spinel CdCr_2S_4 are studied by using the fullpotential linearized augmented planewave method and a modified Becke–Johnson exchange functional within the densityfunctional theory. Most importantly, the effects of the spin–orbit coupling（SOC） on the electronic structures and carrier effective masses are investigated. The calculated band structure shows a direct band gap. The electronic effective mass and the hole effective mass are analytically determined by reproducing the calculated band structures near the BZ center.SOC substantially changes the valence band top and the hole effective masses. In addition, we calculated the corresponding optical properties of the spinel structure CdCr_2S_4. These should be useful to deeply understand spinel CdCr_2S_4 as a ferromagnetic semiconductor for possible semiconductor spintronic applications.

Gaussian Weighted Trajectory Method Ⅳ： No Rainbow Effect in Practice

The Gaussian weighted trajectory method （GWTM） is a practical implementation of classical S matrix theory （CSMT） in the random phase approximation, CSMT being the first and simplest semi-classical approach of molecular collisions, developped in the early seventies. Though very close in spirit to the purely classical description, GWTM accounts to some extent for the quantization of the different degrees-of-freedom involved in the processes. While CSMT may give diverging final state distributions, in relation to the rainbow effect of elastic scattering theory, GWTM has never led to such a mathematical catastrophe. The goal of the present note is to explain this finding.

Effect of Globalisation on Food Behaviour Among Badagas

An ethnography study was conducted among five villages in Kotagiri district of Tamil Nadu,to identify“how globalisation affects the food behaviour of Badagas”.The research is a qualitative study,having implemented Vygotsky’s socio-cultural theory.The traditional food processed and prepared by women of Badagar community is intimately connected to their socio-cultural,ecological,and spiritual life and health.The processing and preparation of ethnic foods demonstrate not only the creativity and treasure of food heritage of tribal women,but also their incremental learning to sustain the life and ecosystem as a whole.Looking to the diversities in ethnic foods,an attempt has been made to explore the ethnic foods from five different villages in Kotagiri district.The food choices made by people,either as individuals or as a group,can reveal views,passions,background knowledge,assumptions,and personalities.Food choices tell stories of families,migrations,assimilation,resistance,changes over times,and personal as well as group identity.In each place,the processing method of these foods is somewhat different based on the growing international trade,migration,tourism,and globalisation.The food used in the dietary system was found to be nutritionally rich and culturally important in various festivals and ceremonies.Ethnic food prepared and consumed by women in the past cannot be seen in the isolated mode,instead it is a complex dynamics in which nutrition,health,food security,culture,ethics,subsistence economy,and ecological sustainability are integral components.This paper thereby determines and defines the behaviour and practice of food among the respondents,its change,and cause.

A Resolution of the Black Hole Information Paradox via Transfinite Set Theory

A black hole is essentially a relativistic as well as a quantum object. Therefore the information paradox of black holes is a consequence of the clash between these two most fundamental theories of modern physics. It is logical to conclude that a resolution of the problem requires some form of a quantum gravity theory. The present work proposes such a resolution using set theory and pointless spacetime geometry.

Doppler’s Effect, Gravity and Cosmology

We first show that Doppler’s effect implies that the time runs identically in the frames of reference of the source of light and the observer. Furthermore, we then show that the frequency shift due to the (assumed) expansion of space, if any, is “indistinguishable” from that due to the motion of the source with respect to the observer;and that the shift does not depend on the distance to the source. Observed frequency shifts of cosmological sources then need to be interpreted as being only due to their motions with respect to us. This has important implications for our ideas in cosmology.

Robust Resource Management Control for CO2 Emission and Reduction of Greenhouse Effect: Stochastic Game Approach

With the increasingly severe global warming, investments in clean technology, reforestation and political action have been studied to reduce CO2 emission. In this study, a nonlinear stochastic model is proposed to describe the dynamics of CO2 emission with control inputs: clean technology, reforestation and carbon tax, under stochastic uncertainties. For the efficient resources management, a robust tracking control is designed to force resources tracking a desired reference output. The worst-case effect of stochastic parametric fluctuations, external disturbances and uncertain initial conditions on the tracking performance is considered and minimized from the dynamic game theory perspective. This stochastic game problem, in which one player (stochastic uncertainty) maximizes the tracking error and another player (control input) minimizes the tracking error, could be equivalent to a robust minimax tracking problem. To avoid solving the HJI, a fuzzy model is proposed to approximate the nonlinear CO2 emission model. Then the nonlinear stochastic game problem could be easily solved by fuzzy stochastic game approach via LMI technique.

基于心理学理论的多策略生活选择算法

生活选择算法(Life Choice-Based Optimizer,LCBO)是根据人们在日常生活中做出不同的决策而设计的一种智能优化算法。但LCBO在解决高维函数优化问题时容易陷入局部最优,且收敛速度慢。因此,本文基于心理学理论提出一种多策略生活选择算法(Multi-Strategy Life Choice-Based Optimizer,MSLCBO)。首先,基于“贝勃规律”提出有策略的向优秀组学习,提高算法的局部搜索能力;其次,在算法迭代后期受“关系场”理论启发,提出精英交流机制对质量较好的解进行搜索,进一步增强算法局部开发能力,提高算法的优化速度;最后,为避免“投射效应”的心理学效应影响,引入基于折射反向学习策略,从而提升算法的全局搜索能力。对改进后的算法进行2次对比实验:将MSLCBO与其他7种智能优化算法在16个基准测试函数上进行了对比,结果表明MSLCBO性能优势显著;并采用工程实际应用问题中的三杆桁架设计问题进行测试,同样验证了MSLCBO的有效性。

D-S证据理论在作战效能评估中的应用

针对如何利用多数据源来评估武器装备作战效能的问题进行研究,分别对专家评估和仿真试验这两种信息源的m ass函数建立模型。在此基础上,利用D-S合成公式对不同指标进行综合,最终得到评估装备的作战效能。利用这种评估方法,分别对4种方案下的雷达系统进行评估,结果表明该方法符合评估实际,对多数据源的评估有一定的借鉴意义。

基于D-S证据理论的导弹武器系统效能评价

导弹武器系统的效能评价是有人参与的复杂系统评价问题.针对该类问题评价的复杂性和不确定性以及多属性群决策性,提出采用D-S证据理论对系统的导弹武器系统效能进行评价,给出了D-S证据理论用于系统效能评价的方法.证据理论综合了来自各个专家的评价信息,能够使得评价过程更加合理.仿真结果初步表明D-S证据理论在系统效能评价中具有一定的适用性.

基于D-S证据理论的邮件筛选方法

针对目前色情邮件筛选中只针对邮件的文本内容进行过滤的不足,考虑邮件的文本和附件中所携带的图片信息,提出了一种基于证据理论的色情邮件的筛选方法。新方法分别使用一个色情图片检测器和一个文本分类器分别对邮件的附件及其内容进行初判别,然后将两个检测器的判别结果作为证据,使用D-S理论融合两个检测器的输出得到最后的判别结果。实验表明,该方法能有效地提高色情邮件的识别率。

改进D-S理论的某型高炮武器系统作战效能评估

鉴于某型高炮武器系统的复杂性,考虑采用多数据信息融合的方式来实现其效能评估。针对传统D-S理论在融合冲突信息时的局限性,提出一种基于数据信息确定证据权重的改进D-S理论,并将其用于某型高炮武器系统的作战效能评估。应用示例表明改进D-S理论相比其他算法更加优越。

基于可变精度粗糙集与D-S证据理论的C^4IKSR系统效能评估

为有效地对C4IKSR系统的效能进行评估，建立了C4IKSR系统效能评估指标体系。用粗糙集约简的思想减少了系统巾冗余的属性，获得了规则和可变精度的下近似集。提出了一种基于D—S证据理论的C4IKSR系统效能评估模型，利用可变精度的下近似集的计算结果给出基本概率赋值，进行了多信息表的数据融合。结果表明能够对C4IKSR系统效能进行有效地评估。

如何正确使用SCI标准评价基础科学

近年来 ,SCI论文成为评价一个单位、一个研究人员基础理论研究水平高低的重要指标 ;同时 ,有些单位在制定科研成果奖励时 ,也对 SCI论文给予较高奖励。对 SCI论文应有一个客观公正的认识 ,SCI论文水平并不一样 ,也不是所有 SCI论文的水平都非常高。据此 ,试图给出在评价基础理论研究成果时 ,如何正确使用 SCI标准 ,并对

基于D-S理论的组网对抗效果实时评估

研究了现有各类效果评估方法的局限,提出了组网电子对抗条件下效果实时评估的实现途径,将目标辐射源的信号波动度作为效果评估的依据,并提出了所需信度函数的获取方法。在此基础上,应用D-S证据理论进行多信息融合,进而作出效果实时评估。最后对融合过程作了仿真计算,仿真结果对于未来组网电子对抗作战具有较大的参考价值。

碰撞能对反应S+HH/HD/DH/DD动力学性质的影响

以最新的势能面为基础,首先用量子方法和准经典法计算了反应S+HH在不同碰撞能下的反应截面,这2种方法的计算结果符合的很好,证明了计算结果的可靠性.然后计算了不同碰撞能下反应S+HH/HD/DH/DD的激发函数、产物散射方向、转动角动量定向和取向等动力学性质.结果表明碰撞能对反应S+HH有促进作用,大的质量因子会阻碍反应的发生,碰撞能和质量因子对反应的矢量性质均有明显的影响.

密度泛函理论研究S-亚硝基硫醇化合物中S-NO的键离解能的取代基效应(英文)

利用密度泛函理论（B3LYP，B3PW91，B3P86），使用6—31G^＊＊基组计算了乙氰溶液中孓亚硝基硫醇化合物中SNO的键离解能。结果表明B3PW91／G-31G^＊＊方法计算得出的键离解能平均绝对偏差为7．36kJ／mol，与实验符合比较好。因此，我们建议使用B3PW91／6—31G^＊＊方法来计算S-亚硝基硫醇化合物中S-NO的键离解能。进一步分析表明不同的取代基对S-NO的键离解能影响不同。当C6H5SNO中的一个H基团分别被2-CH3、4-CH3、4-Cl、4-NO2基组取代时，S-NO的键离解能降低2．09～12．54kJ／mol。当C6H5SNO中的一个H基团分别被2-Cl、3-CH3、3-Cl、4-OCH3基组取代时，S-NO的键离解能增加0．042～36．37kJ／mol。