正常小儿颅内不同组织CT值

正常小儿脑组织ＣＴ值国内尚我报告；作者选择１０岁以内正常小儿子１２０例，分三人年龄组进行颅内不同脑组织ＣＴ值测定，并将小儿与成人的脑绰组织值ＣＴ比较，收结果看出；小儿灰质、白质及小脑ＣＴ值明显低于成人的，随年龄增长ＣＴ值递增；新生儿脑组织ＣＴ值明显低于儿童；儿童丘脑莫过基底节ＣＴ值近似成人。     

Distribution and relative density of cetaceans in the Hauraki Gulf,New Zealand

Understanding species distributions, and how they change in space and time, is vital when prioritising conservation or management initiatives. We assessed the distribution and density patterns of common dolphins (Delphinus sp.), bottlenose dolphins (Tursiops truncatus) and Bryde’s whales (Balaenoptera edeni) in the Hauraki Gulf, New Zealand. Dedicated boat-based surveys were conducted in the inner Hauraki Gulf (IHG) and off Great Barrier Island (GBI) during 2010–2012. Generalised linear models were used to investigate temporal changes in relative densities and kernel density estimation was implemented to examine spatial trends. Common dolphins were widely distributed during all seasons, with higher densities observed during winter and spring in the IHG but during autumn off GBI. There was inter-annual variation in Bryde’s whale distribution, with high densities recorded off GBI in 2011. Bottlenose dolphins were infrequently sighted in the IHG but regularly encountered off GBI, with the highest densities during spring and summer.     

Geography Deserts: State and Regional Variation in the Formal Opportunity to Learn Geography in the United States, 2005–2015

The formal opportunity to learn geography in the United States is unevenly distributed across space, creating possible geography deserts. Data on the number of exams taken in Advanced Placement Human Geography (APHG) and bachelor’s degrees earned in geography are mapped at the state and regional scales. Normalized rates are ranked and grouped into quintiles. For APHG exams, states in the southeastern region of the United States are in the uppermost quintiles while states in the northeastern region are in the lowermost quintiles. The pattern for bachelor’s degrees in geography is somewhat the spatial inverse of that for APHG.     

Geographic Patterns of Craft Breweries at the Intraurban Scale

This article examines the intraurban geography of craft breweries in ten cities across the United States. First, through an exhaustive literature review, we outline both supply- and demand-side factors that might cause craft breweries to cluster. Second, we empirically test whether these establishments tend to cluster within cities using spatial statistical techniques. Many communities are attempting to support the establishment of more craft breweries as a way to boost tourism and economic development. The findings from this article aid in this discussion by providing insights into how craft brewers locate and the factors that could influence their location decision behavior. Our findings suggest that craft brewers do in fact cluster. There are both supply and demand factors responsible. On the supply side, the collaborative environment within the industry and the artisan nature of the industry's products allows for benefits of clustering to outweigh the costs associated with this behavior. On the demand side, the emergence of “brewery districts” allows individual brewers to enjoy the reputation benefits associated with the district in terms of increased foot traffic from locals and visitors looking to sample a variety of beers.     

Statistics-based outlier detection for wireless sensor networks

Wireless sensor network (WSN) applications require efficient, accurate and timely data analysis in order to facilitate (near) real-time critical decision-making and situation awareness. Accurate analysis and decision-making relies on the quality of WSN data as well as on the additional information and context. Raw observations collected from sensor nodes, however, may have low data quality and reliability due to limited WSN resources and harsh deployment environments. This article addresses the quality of WSN data focusing on outlier detection. These are defined as observations that do not conform to the expected behaviour of the data. The developed methodology is based on time-series analysis and geostatistics. Experiments with a real data set from the Swiss Alps showed that the developed methodology accurately detected outliers in WSN data taking advantage of their spatial and temporal correlations. It is concluded that the incorporation of tools for outlier detection in WSNs can be based on current statistical methodology. This provides a usable and important tool in a novel scientific field.     

PDCA循环法用于专业硕士产教融合培养模式研究

为满足新时代对卓越工程技术人才的需求,本文在分析专业硕士培养现状基础上,从人才培养方案入手,提出了PDCA理念用于产教深度融合培养模式,讨论了产教深度融合培养的目标制定、计划落实、课程体系开发、导师团队优化及实践基地的质量保障建设等方面的模式与对策,论述了专业硕士研究生培养的质量监控体系,总结出教育教学各环节的计划、执...     

Asymptotic Rayleigh instantaneous unit hydrograph

The instantaneous unit hydrograph for a channel network under general linear routing and conditioned on the network magnitude,N, tends asymptotically, asN grows large, to a Rayleigh probability density function. This behavior is identical to that of the width function of the network, and is proven under the assumption that the network link configuration is topologically random and the link hydraulic and geometric properties are independent and identically distributed random variables. The asymptotic distribution depends only on a scale factor, , where is a mean link wave travel time.     

肝脏肺吸虫病的CT诊断

作者认为肺吸虫病发生在肝脏系少见病例，以ＣＴ认识和诊断上有待进一步提高，特别与肝结核、肝脓肿、肝包虫囊肿等鉴别诊断，仍存在一定的困难。临床上肺吸虫病多见脑部，肺，及皮下组织，我院病理科近十余年在肝脏发现肺吸虫病也是仅有一例，上述疾病ＣＴ表现均可出现低密度坏死区，有规则环状增强，斑点状钙化灶，单房及改变及大小不等的结节。组织学上的改变，肝细胞混浊肿胀，液化，变性，坏死，钙化，所不同处寄生虫病的病理组     

南极普里兹湾外海大磷虾分布与现存量

本文根据１９９１／１９９２、１９９２／１９９３年度在普里兹湾外海调查的资料，进行了大磷虾水平、垂直分布的研究和资源现存量的估算。结果表明，６３°～６７°Ｓ、６８°Ｅ沿线是大磷虾群分布较密集的海区，在调查海域内大磷虾群主要分布在７０ｍ以上的水层中。１９９１／１９９２，在１５０５３３．９ｋｍ２调查海域内的大磷虾资源现存量为１．６９９×１０６ｔ；１９９２／１９９３，在１２５７４０．７ｋｍ２调查海域内的大磷虾资源现存量为４．０４３×１０６ｔ。     

基于主成分神经网络的台风灾害经济损失评估

本研究建立了浙江省台风灾害直接经济损失评估模型。把浙江省台风灾害直接经济损失资料换算成直接经济损失指数,运用主成分分析法对表示致灾因子、孕灾环境与承灾体的评估因子进行数据处理,提取主成分作为BP神经网络模型的输入,从而建立评估模型。模型历史拟合结果和实际一致。在2007年和2008年影响浙江省的5个台风的实际评估中,强台风"Vipa"灾后评估值比实际值偏大2.16,其余4个台风灾后评估值比实况偏大0.2~0.7,反映了人们对影响大的台风防灾减灾工作的重视和防灾减灾效果。根据台风开始影响时过程风雨预报值进行预评估,过程风雨预报值较准确的台风,预评估结果和灾后评估值一致;过程风雨预报值误差较大的台风,预评估效果较差。因此,该模型可用于实际台风灾害直接经济损失评估,提高台风影响前风雨预报准确率是提高预评估准确率的关键。