色貌模型在跨媒体图像复制中的应用研究

目的 研究CIECAM02和iCAM色貌模型颜色空间的均匀性,以及应用于不同观察条件下的图像复制效果。方法 利用均匀颜色数据集测试色貌模型颜色空间的均匀性,并通过视觉评价实验来测试2个色貌模型的图像复制效果。结果 CIECAM02的色貌空间具有更好的色差均匀性,iCAM的色貌空间具有更好的色相、明度和彩度均匀性。在不同观察条件下的图像复制中,CIECAM02有更好的表现。结论 iCAM的颜色空间适合于颜色色貌属性的计算,而CIECAM02的颜色空间更适合于颜色色差的计算,在不同观察条件下的图像复制中,CIECAM02有更稳定的表现,但并不是对所有图像都有更好的表现。     

用“二步进酸”法提高阳床再生效果的探讨

广州员村电厂化学除盐系统自投产以来,阳床再生后,阳床树脂层还存在较多的残余酸和阳离子,交换出来的阳离子又重新被再生好的树脂所吸附,降低了树脂的交换能力,影响阳床的出水水质和再生效果。这种原阳床再生方法,经常出现阳床再生不合格现象,酸耗较高。为此,该厂改用“二步进酸”法再生阳床。改为此法再生阳床后,使再生合格率达100 % ,酸耗有较大幅度的下降,节省了再生用酸量,有效地降低了除盐水的生产成本。     

Macroeconomic model of reproduction

A macroeconomic reproduction model consisting of commodities available in a state and population and of relations in commodity and population reproduction is defined, and structural laws of commodity reproduction are revealed. It is shown that the Ukrainian economy has a reduced reproduction characterized by net profit earned from reduction in depreciation costs. __________ Translated from Kibernetika i Sistemnyi Analiz, No. 6, pp. 101–116, November–December 2005.     

Urinary chemosignals,reproduction, and population size for house mice (Mus domesticus) living in field enclosures

The effects of urinary chemosignals influencing reproduction and puberty were studied in free-living house mice maintained in six 0.1-ha outdoor enclosures. Two enclosures were provided with urine and soiled bedding from male mice, two with urine and soiled bedding from group-caged female mice, and two with water and clean bedding as a control. Reproduction, puberty, recruitment, and population size all were affected by the urine treatments. Overall, populations reached significantly greater numbers in the enclosures treated with male urine and soiled bedding, intermediate levels with the water and clean bedding treatment, and were lowest for enclosures treated with urine and soiled bedding from grouped females. The population differences resulted from urinary chemosignal effects on adult female reproduction and female puberty; in general, females were in higher states of reproductive condition, more pregnancies occurred, and young females attained puberty earlier in male-treated enclosures and later in female-treated enclosures than in control enclosures. Urinary chemosignals that affect endocrine physiology and related reproductive processes may be one mechanism by which various factors influence population size in house mice.     

Ansel Adams and George Waters: Photographer and Printer

Ansel Adams's photographic career was paralleled by his desire to achieve the finest quality of photomechanical reproduction of his images for his many fine printed books. For thirty years, he relied upon letterpress halftone to recreate the aesthetic effect of his ‘f/64’ style. In the 1960s, as letterpress for photographic reproduction was phased out by most commercial printers, George Waters introduced Adams to the new technology of offset lithography. Together, they formed a highly successful collaboration as artist and master printer from 1969 to 1979.     

一种基于有性繁殖的遗传算法

为了更有效地抑制标准遗传算法 (SGA)中的早熟收敛现象和提高收敛速度 ,提出了一种基于有性繁殖的遗传算法 .该算法借鉴了自然界最常见的有性繁殖现象 ,首先将每个个体编码为配对的双染色体码串 ,并增加性别染色体编码 ,以建立遗传个体的性别特征 ;然后 ,通过建立有性遗传进化算子来对不同性别的个体赋予不同的进化控制参数 ,以使得雄性个体具有较强的全局探索能力 ,而使雌性个体具有较强的局部快速寻优能力 ,最后通过建立对应的有性遗传交叉、变异算子 ,使得这种基于有性繁殖的遗传算法具有更强的全局寻优能力和快速收敛能力 .用该算法对一系列典型函数和其他优化问题进行了优化计算试验 ,结果证明 ,该算法不易陷入早熟收敛 ,且全局搜索能力和局部搜索能力平衡较好 ,收敛速度快 ,同时也验证了这种基于有性繁殖的遗传算法的有效性和优良性能 .     

指端电触觉再现的传函矩阵及解耦研究

针对电触觉再现中的解耦问题,提出采用噪声预置解除耦合的有效方法。通过研究电触觉再现的传递函数矩阵,从中分离出噪声预置矩阵,然后通过实验方法求解噪声预置矩阵。两点模式下的实验表明,采用噪声预置可以较好地改善电触觉再现的效果。     

Structured parametric epidemic models

A stage-structured model for a theoretical epidemic process that incorporates immature, susceptible and infectious individuals in independent stages is formulated. In this analysis, an input interpreted as a birth function is considered. The structural identifiability is studied using the Markov parameters. Then, the unknown parameters are uniquely determined by the output structure corresponding to an observation of infection. Two different birth functions are considered: the linear case and the Beverton–Holt type to analyse the structured epidemic model. Some conditions on the parameters to obtain non-zero disease-free equilibrium points are given. The identifiability of the parameters allows us to determine uniquely the basic reproduction number ?₀ and the stability of the model in the equilibrium is studied using ?₀ in terms of the model parameters.     

从《资本论》社会资本再生产理论看我国宏观经济的内外部失衡

马克思在《资本论》中深刻剖析了社会再生产运动的一般规律,揭示了生产与消费、供给与需求之间的比例关系对宏观经济运行的重要意义。从马克思的社会资本再生产理论看,我国当前宏观经济内外部失衡,根源在于生产与消费比例不协调。要纠正宏观经济失衡,必须从扩大内需、严格控制投资规模入手,从根本上解决生产与消费比例失调问题。     

Controlling of crustacean zooplankton reproduction in biological activated carbon （BAC） filters by strengthen operation and management of conventional process

To counter the mass reproduction and penetration of crustacean zooplankton in Biological Activated Carbon(BAC)filters which may result in the presence of organisms in potable water and water pollution,this paper analyzed the factors affecting organisms’ reproduction in BAC filters.A comparative study was performed on the density and composition of crustacean zooplankton of the concerned water treatment units of two advanced water plants(Plant A and B)which with the same raw water and the same treatment technique in southern China.The results obtained show that the crustaceans’ density and composition was very different between the sand filtered water of Plant A and Plant B.which Harpacticoida bred sharply in the sediment tanks and penetrated sand filter into BAC filters was the primary reason of crustaceans reproduce in BAC filters of Plant A.For prevention of the organisms reproduction in BAC,some strengthen measures was taken including pre-chlorination,cleaning coagulation tanks and sediment tanks completely,increasing sludge disposal frequency to stop organisms enter BAC filters,and the finished water quality was improved and enhanced.