灰度共生矩阵纹理特征提取算法的优化与实现

灰度共生矩阵是图像灰度的二阶统计度量,反映了纹理图像灰度在方向、局部邻域和变化幅度的综合信息。由于灰度共生矩阵算法具有计算量大、计算耗时长等缺点,严重影响了系统的实时性。针对此问题在分析了灰度共生矩阵计算并行性的基础上,根据TM3320C6678的性能,设计了基于共生矩阵纹理特征提取算法的嵌入式系统实现,并在CCS2.2上对算法进行了编码实现。

Consumption of Ecosystem Services in Laos

The exponential increase of ecosystem utilization has instigated a serious conflict between ecosystem services and residents'needs.The Belt and Road Initiative has greatly influenced Laotian production and living,and the scientific assessment of the consumption of ecosystem services in Laos is important for exploring residents'influence on the ecosystem.Based on data for the Laotian consumption of agricultural products,fruits and livestock products during 1961-2013,normalized by either harvest index or feed conversion ratio,this study draws three main conclusions.1)Ecosystem service consumption in Laos is centered on the consumption of farmland,forestry and grassland ecosystem services,which account for over 80%,over 10%and under 2%,showing downward,upward and constant trends,respectively.The consumption of these ecosystem services shows a trend of increasing first,then fluctuating,and finally increasing.2)The consumption of ecosystem services in Laos was characterized by the mode of"dominance of consumption of the farmland ecosystem services"from 1961 to 2008,and the mode of“balanced development of consumption of farmland,forest and grassland ecosystem services”from 2008 to 2013,with a trend of transformation from the former into the latter.3)The formation and change in the consumption mode of Laotian ecosystem services have been affected by both supply and trade.Laos developed agriculture mainly during the period from 1961 to 2008,forming the mode of"dominance of consumption of the farmland ecosystem services".This development benefited from the enriched varieties of imports as well as the increased value of trade and import volume.However,the consumption of ecosystem services in Laos after 2008 changed from the mode of“dominance of consumption of the farmland ecosystem services”to one of“balanced development of consumption of farmland,forest and grassland ecosystem services".This study provides an empirical reference for research on the consumption of ecosystem services.

The ecological consequences of temperament in spiders

Ecological and evolutionary studies on spiders have been featured prominently throughout the contemporary behavio- ral syndromes movement. Here we review the behavioral syndromes literature devoted to spiders, and identify some ways in which behavioral syndromes can impact the function of spiders in ecological communities. We further highlight three general themes within the behavioral syndromes literature for which spiders have served as front running model systems： （1） how trait correlations beget performance trade-offs, （2） the influence that behavioral trait variants have on interspecific interactions and （3） mechanisms that aid in maintaining behavioral variation within-and among-populations. Research on behavioral syndromes con-tinues to grow at an impressive rate, and we feel the success of behavioral syndromes studies in spiders bodes well for their con-tinued prominence.

ON FIRST INTEGRALS OF POLYNOMIAL AUTONOMOUS SYSTEMS

Using Carleman linearization procedure, this paper investigates the problem of first integrals of polynomial autonomous systems and proposes a procedure to find the first integrals of polynomial family for the systems. A generalized eigenequation is obtained and then the problem is reduced to the solvability of the eigenequation. The result is a generalization of some known results.

Information schema constructs for instantiation and composition of system manifestation features

Complementing our previous publications, this paper presents the information schema constructs （ISCs） that underpin the programming of specific system manifestation feature （SMF） orientated information management and composing system models. First, we briefly present （1） the general process of pre-embodiment design with SMFs, （2） the procedures of creating genotypes and phenotypes of SMFs, （3） the specific procedure of instantiation of phenotypes of SMFs, and （4） the procedure of system model management and processing. Then, the chunks of information needed for instantiation of phenotypes of SMFs are discussed, and the ISCs designed for instantiation presented. Afterwards, the information management aspects of system modeling are addressed. Methodologically, system modeling involves （1） placement of phenotypes of SMF in the modeling space, （2） combining them towards the desired architecture and operation, （3） assigning values to the parameters and checking the satisfac- tion of constraints, and （4） storing the system model in the SMFs-based warehouse database. The final objective of the reported research is to develop an SMFs-based toolbox to support modeling of cyber-physical systems （CPSs）.