HEVC帧内预测编码的快速CU决策算法

提出一种快速编码单元(CU)修剪方法和CU深度范围决策方法.在快速CU修剪方法中,根据贝叶斯决策准则,基于残差信息Hadamard变换绝对值之和(SATD)提前结束CU的修剪;在CU深度范围决策方法中,根据当前CU深度与空间邻近CU深度的相似性决策当前CU深度级范围.通过在HM10.1的实验证明:文中方法相比于HM10.1的标准代码,能降低35.9%的编码时间,且BDBR的增加仅为1.039%.     

The effect of the phytoalexins,lubimin, (−)-maackiain,pinosylvin, and the related compounds dehydroloroglossol and hordatine M on human lymphoblastoid cell lines

Summary We have tested the effect of the phytoalexins lubimin, (–)-maackiain and pinosylvin and the related compounds dehydroloroglossol and hordatine M on the growth of the human lymphoblastoid cell lines Molt and Raji. (–)-maackiain, pinosylvin and dehydroloroglossol showed significant growth inhibitory action on the cells. Suppression of [³H] thymidine and [³H] leucine uptake was tested and noted in pinosylvin and dehydroloroglossol. The phytoalexins and related compounds are widespread in plants and provide a potential source of antineoplastic substances.We would like to acknowledge the assistance of J. Hux in preparing the phytoalexins and related compounds. This work was supported by a grant from National Health and Welfare Canada. Correspondence to Dr. L. Skinnider, Department of Pathology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7M OWO.     

Calcium carbonate nanoparticles promote osteogenesis compared to adipogenesis in human bone-marrow mesenchymal stem cells

Rhombohedron-like and fusiform calcium carbonate nanoparticles were fabricated using a new method. Their geometry was controlled by varying the mixing speed and ratio of ethanol versus water in reaction system. The calcium carbonate nanoparticles(CCNPs) have slight effect on viability of human bone-marrow mesenchymal stem cells(hBMSCs) with dose-dependent and shape-dependent, but they can significantly promote osteogenic differentiation of hBMSCs in vitro by 10–37% increase of alkaline phosphatase(ALP) activity, 9–36% growth of collagen secretion and 1.13–1.83 folds upregulation of osteogenesis-related genes, even at lower dose ranges(5–20 μg/ml). The efficacity of promoting osteogenesis depends on the shape and dose of CCNPs. Furthermore,adipogenesis was inhibited by less accumulation of lipid droplets, lower triglyceride(TG) secretion and downregulation of adipogenesis-related genes. These findings improve the understanding of effects CCNPs on hBMSCs fate towards osteoblasts or adipocytes and have meaningful impact for combining use of CCNPs and hBMSCs in tissue engineering and regenerative medicine fields.     

反应分离过程模拟：Ⅱ.反应闪蒸过程

采用变换变量的概念，将反应闪蒸过程模型变换为普通的非反应闪蒸模型。新模型将反应与相平衡相结合，避免了反应量的计算，且适用于含有惰性组分的反应闪蒸过程。以含有惰性组分的ＭＴＢＥ反应闪蒸过程为例，用非反应闪蒸方法进行计算，得到了关于反应闪蒸的一般结论。     

有理函数变换法求扩展(3+1)维Jimbo-Miwa方程丰富的精确解

利用扩展的有理函数变换法对两个扩展的（3+1）维Jimbo-Miwa方程进行了研究，得到了丰富的精确解，特别是共振孤波解，复合解及三角函数、双曲函数和指数函数结合形式的解.除此之外，对所得解的结构作了详细的图像展示和性质分析.     

新型复合转向机构驱动油缸铰点优化设计

阐述了一种新型摆动式复合转向机构,针对转向机构的驱动油缸铰点位置设计问题;利用Denavit-Hatenberg齐次变换矩阵建立了该转向机构的运动学模型;提出了确定复合式转向机构驱动油缸铰点位置的多目标优化设计方法;结合工程实例,对转向驱动油缸的铰点进行了优化设计。样车试验表明了该方法的合理性,并对转向驱动油缸行程的非对称特性、转向机构的对称性、摆动角与偏转角特性以及转向机构的平顺性进行了分析,为该机构的工程应用提供了理论基础。     

NKC－1中草药合剂对T24－ras活化癌基因转化细胞的选择性杀伤及抗肿瘤作用的研究

根据我国传统中医药理论及现代分子生物学知识，设计并配制了具有抗肿瘤效应的复方中草药合剂ＮＫＣ－１．体外实验表明：ＮＫＣ－１能够选择性杀死ｒａｓ癌基因诱导的转化细胞，在较低浓度条件下对转化细胞的恶性行为有一定的抑制和逆转作用。急性毒性实验结果显示：当注射剂量为０．８ｍｌ／只昆明鼠时，仍无严重毒性。裸鼠体内实验表明：ＮＫＣ－１具有良好的抑制肿瘤效应。     

基于正交矩模糊和仿射混合不变量的图像识别算法

为了识别含有模糊和仿射混合形变的图像,提出了一种新的基于正交矩模糊和仿射混合不变量的图像识别算法.该算法首先使用归一化方法构造了基于Legendre正交矩的仿射不变量,并结合Legendre正交矩的模糊不变量提出了Legendre正交矩的模糊和仿射混合不变量;然后将该混合不变量作为描述算子,将欧几里德范数作为分类尺度,以最近邻法则作为分类器,对图像进行识别.实验结果表明,与其他基于非正交矩的混合不变量相比,基于Legendre正交矩的模糊和仿射混合不变量在混合形变下能够获得更好的不变性,不会带来信息冗余问题,并且对噪声鲁棒性较好;此外,该图像识别算法比其他算法具有更高的识别率,特别是在图像含有较大噪声的情况下.     

科技进步与农业发展

论述了科技进步包括立体农业的研究进展、生物农药的开发利用以及转基因技术的应用给农业生产带来的新变化,展望了农业的发展前景。     

钢骨转换梁结构的受力特点分析

对钢骨混凝土梁结构和转换层结构的受力特点作了论述，在此基础上，对钢骨混凝土梁的正截面承载力、斜截面承载力等的计算作了简要的介绍，分析了钢骨转换梁结构的受力特点，最后指出了钢骨混凝土转换梁在今后工程实践中的发展前景。