法定计量单位在林业科技研究论文中的应用   总被引：1，自引：0，他引：1  

朱虹 《中国科技信息》2006,17(13):209-209,211

在国际上，法定计量中的某些基本概念已有了更新的更确切的见解，但目前在某些林业研究的稿件中仍存在着量和单位的混乱现象；严重影响着期刊的质量，本文从科技期刊责编加工文稿的实际出发，对林业科技研究稿件中常应注意的量和单位问题，进行讨论，并提出一些常用法定单位的正确用法。  相似文献   

国内外信息产业测度方法综述     

王欣  靖继鹏  王钢 《情报科学》2006,24(12):1903-1908

本文首先阐述了信息产业测度的基本理论与方法，对信息产业测度方法进行了比较研究，指出要进行信息产业的测度，既要有合理的指标体系又要有正确的测度方法。  相似文献   

Status and Interrelationship of Zinc,Copper, Iron,Calcium and Selenium in Prostate Cancer     

Bhupendra Pal Singh  Shailendra Dwivedi  Urmila Dhakad  Ramesh Chandra Murthy  Vimal Kumar Choubey  Apul Goel  Satya Narayan Sankhwar 《Indian journal of clinical biochemistry : IJCB》2016,31(1):50-56

Deficiency or excess of certain trace elements has been considered as risk factor for prostate cancer. This study was aimed to detect differential changes and mutual correlations of selected trace elements in prostate cancer tissue versus benign prostatic hyperplasia tissue. Zinc, copper, iron, calcium and selenium were analysed in histologically proven 15 prostate cancer tissues and 15 benign prostatic hyperplasia tissues using atomic absorption spectrophotometer. Unpaired two tailed t test/Mann–Whitney U test and Pearson correlation coefficient were used to compare the level of trace elements, elemental ratios and their interrelations. As compared to benign prostatic tissue, malignant prostatic tissue had significantly lower selenium (p = 0.038) and zinc (p = 0.043) concentrations, a lower zinc/iron ratio (p = 0.04) and positive correlation of selenium with zinc (r = 0.71, p = 0.02) and iron (r = 0.76, p = 0.009). Considerably divergent interrelationship of elements and elemental ratios in prostate cancer versus benign prostatic hyperplasia was noted. Understanding of differential elemental changes and their interdependence may be useful in defining the complex metabolic alterations in prostate carcinogenesis with potential for development of element based newer diagnostic, preventive and therapeutic strategies. Further studies may be needed to elucidate this complex relationship between trace elements and prostate carcinogenesis.  相似文献   

XMage: An image retrieval method based on partial similarity     

Chang-Ryong Kim  Chin-Wan Chung 《Information processing & management》2006

XMage is introduced in this paper as a method for partial similarity searching in image databases. Region-based image retrieval is a method of retrieving partially similar images. It has been proposed as a way to accurately process queries in an image database. In region-based image retrieval, region matching is indispensable for computing the partial similarity between two images because the query processing is based upon regions instead of the entire image. A naive method of region matching is a sequential comparison between regions, which causes severe overhead and deteriorates the performance of query processing. In this paper, a new image contents representation, called Condensed eXtended Histogram (CXHistogram), is presented in conjunction with a well-defined distance function CXSim() on the CX-Histogram. The CXSim() is a new image-to-image similarity measure to compute the partial similarity between two images. It achieves the effect of comparing regions of two images by simply comparing the two images. The CXSim() reduces query space by pruning irrelevant images, and it is used as a filtering function before sequential scanning. Extensive experiments were performed on real image data to evaluate XMage. It provides a significant pruning of irrelevant images with no false dismissals. As a consequence, it achieves up to 5.9-fold speed-up in search over the R*-tree search followed by sequential scanning.  相似文献   

竞争力度量的一种新假说——基于结构主义方法论的研究     

刘炳胜  王雪青  程建刚 《软科学》2010,24(3):117-121

针对"竞争力内涵与度量尚未形成统一认识"的问题,通过梳理国际知名学者与组织的相关研究成果,总结出竞争力度量的共性指标;在此基础上,运用结构主义方法论的研究思想,将竞争力与牛顿力学和量子力学进行类比后,针对经济竞争的三种方式,将力学中的动量定理理论推广到经济管理领域,提出了竞争力度量新假说。最后,运用该理论对我国省域建筑产业竞争力进行了实证研究。  相似文献   

科技中介在国家创新系统中的功能及其体系构建   总被引：35，自引：0，他引：35  

马松尧 《中国软科学》2004,(1):109-113,120

完善科技中介体系对于国家创新系统结构的优化和效能的提高具有十分重要的意义。本文对科技中介组织从广义和狭义两个方面进行了界定，并进行了分类。分析了我国科技中介体系存在的问题，从转变政府科技管理职能、完善法律政策环境、为科技中介组织创造发展空间和营造公平竞争的社会环境等方面提出了对策建议。  相似文献   

高填路堤下沉原因及其防治措施     

张玉霞 《安阳工学院学报》2005,(4):28-29

路基整体下沉或局部沉降是高填路堤的常见病害.对于这一问题,应采取相应的防治措施,确保路基工程有足够的稳定性和耐久性,从而降低或减少路堤病害发生.  相似文献   

Primary prevention of reading failure: Effect of universal peer tutoring in the early grades     

Giavana Jones  Dragana Ostojic  Jessica Menard  Erin Picard 《The Journal of educational research》2017,110(2):171-176

Reading is typically considered a survival skill in our technology- and literacy-bound culture. Individuals who struggle with learning to read are at significantly elevated risk for a number of negative outcomes, including school failure, under- and unemployment, and special education placement. Thus, those who do not learn to read fluently will likely be a greater drain on society's resources. The authors examined the effects of a universal (school district-wide) implementation of a well-validated peer-tutoring reading intervention as a system-wide prevention measure in kindergarten through Grade 3 in a small metropolitan area in Canada. Results suggest that nearly all children demonstrated improved reading fluency over time. Yet those at highest-risk for poor outcomes, including those living in poverty and those who face learning challenges due to English as a second-language status or special education enrollment, did not make parallel gains to same-age peers in more affluent schools. Implications for educational policy are discussed.  相似文献   

构建有高等学校特色的惩防腐败体系          下载免费PDF全文

汤耀平 《惠州学院学报》2006,26(2):36-38

高等学校深入贯彻落实惩治和预防腐败体系实施纲要, 加强对权力的制约和监督, 把自律要求和他律措施结合起来, 把各级党组织反腐败的基本经验与高等学校拥有的资源优势结合起来, 加大从源头上预防和惩治腐败的力度, 构建有高等学校特色的惩防腐败体系, 应该而且是大有作为的。  相似文献   

可测函数在可测集上的测度比较   总被引：1，自引：0，他引：1  

郭家勇 《连云港师范高等专科学校学报》2001,(3):53-54

通过不等式给出了可测函数之间的测度大小，并推出更为一般的结论。  相似文献