薄层CT动态扫描在诊断胰腺癌侵犯血管中的价值

探讨了胰腺癌血管受累的ＣＴ分型与肿瘤手术可切除性的关系．对４３例经手术、病理证实的胰腺癌进行薄层ＣＴ动态扫描，根据确定的ＣＴ标准，观察肿瘤与血管的关系，并与手术结果对照．发现胰腺癌血管受累以Ｃ型最常见，占３７．２％，Ａ型１０例，肿瘤切除率１００％（１０／１０），Ｂ型９例，切除率为７７．８％（７／９），Ｃ型、Ｄ型２４例，均不可切除．表明薄层ＣＴ动态扫描能提高胰腺癌血管受累的诊断正确率，血管受累ＣＴ分型对外科制定手术计划具有一定价值．     

政府在建立风险投资体系中的作用

风险投资于20世纪40年代起源于美国,是一种向极具发展潜力的创新企业或中小企业提供股权资本的投资行为.其基本特征是:投资周期长达3至7年,投资者向投资对象注资并提供企业管理方面的帮助,投资者在投资活动结束时的股权转让中获取高额的投资回报.目前,风险投资己遍及所有先进国家,新兴工业国和部分发展中国家,极大地推动了全球高科技事业的发展,加速了高新技术的产业化进程.我国实施"科教兴国"战略,政府重视发展"高科技产业"并将随投融资体制的改革,加快建立风险投资体系.     

高校实验室安全与环保教育方式和内容的思考

分析了高校实验室安全事故发生的因为、实验室安全与环保教育的主要对象、高校开展实验室安全与环保教育的重要性与紧迫性,在此基础上探讨了高校实验室安全与环保教育常规化、日常化、持久化的方式与内容,促进实验室与平安校园的建设.     

地方高等师范院校通用技术师资培养教学设计与实践

探索提高地方高师院校师范学生技术素养的人才培养模式,在校本教学改革实践的基础上,提出为普通高中培养合格通用技术课程师资的教学设计方案。     

Anisotropic fluoride nanocrystals modulated by facet-specific passivation and their disordered surfaces

Rutile-type fluorides have been proven to be active components in the context of emerging antiferr-omagnetic devices. However, controlled synthesis of low-dimensional, in particular two-dimensional (2D), fluorides in a predictable and deterministic manner remains unrealized because of a lack of efficient anisotropic control, which impedes their further development in reduced dimensions. We report here that altered passivation of {110} growing facets can direct the synthesis of rutile-type fluoride nanocrystals into well-defined zero-dimensional (0D) particulates, one-dimensional (1D) rods and 2D sheets in a colloidal approach. The obtained nanocrystals show positive exchange bias and enhanced magnetic transition temperature from the coexistence of long-range antiferromagnetic order and disordered surface spins, making them strong alternatives for flexible magnetic devices and sensors.     

Electro-mechanically controlled assembly of reconfigurable 3D mesostructures and electronic devices based on dielectric elastomer platforms

The manufacture of 3D mesostructures is receiving rapidly increasing attention, because of the fundamental significance and practical applications across wide-ranging areas. The recently developed approach of buckling-guided assembly allows deterministic formation of complex 3D mesostructures in a broad set of functional materials, with feature sizes spanning nanoscale to centimeter-scale. Previous studies mostly exploited mechanically controlled assembly platforms using elastomer substrates, which limits the capabilities to achieve on-demand local assembly, and to reshape assembled mesostructures into distinct 3D configurations. This work introduces a set of design concepts and assembly strategies to utilize dielectric elastomer actuators as powerful platforms for the electro-mechanically controlled 3D assembly. Capabilities of sequential, local loading with desired strain distributions allow access to precisely tailored 3D mesostructures that can be reshaped into distinct geometries, as demonstrated by experimental and theoretical studies of ∼30 examples. A reconfigurable inductive–capacitive radio-frequency circuit consisting of morphable 3D capacitors serves as an application example.     

Understanding divergent domestication traits from the whole-genome sequencing of swamp- and river-buffalo populations

Domesticated buffaloes have been integral to rice-paddy agro-ecosystems for millennia, yet relatively little is known about the buffalo genomics. Here, we sequenced and assembled reference genomes for both swamp and river buffaloes and we re-sequenced 230 individuals (132 swamp buffaloes and 98 river buffaloes) sampled from across Asia and Europe. Beyond the many actionable insights that our study revealed about the domestication, basic physiology and breeding of buffalo, we made the striking discovery that the divergent domestication traits between swamp and river buffaloes can be explained with recent selections of genes on social behavior, digestion metabolism, strengths and milk production.     

滨州市普通高校大学生参加课外体育活动的现状研究

运用问卷调查法、数据统计法等方法,对滨州市普通高校大学生参与课外体育活动的现状及影响因素进行研究分析。研究表明,大学生对参加课外体育活动的态度积极,动机趋向实际;体育项目主要以跑步、篮球、羽毛球为主;与朋友一起参加课外体育活动是首选方式;校园体育器材的缺乏导致大学生不能更好地参加课外体育活动。     

Understanding human influence on climate change in China

China''s climate has been warming since the 1950s, with surface air temperature increasing at a rate higher than the global average. Changes in climate have exerted substantial impacts on water resources, agriculture, ecosystems and human health. Attributing past changes to causes provides a scientific foundation for national and international climate policies. Here, we review recent progress in attributing the observed climate changes over past decades in China. Anthropogenic forcings, dominated by greenhouse gas emissions, are the main drivers for observed increases in mean and extreme temperatures. Evidence of the effect of anthropogenic forcings on precipitation is emerging. Human influence has increased the probability of extreme heat events, and has likely changed the occurrence probabilities for some heavy precipitation events. The way a specific attribution question is posed and the conditions under which the question is addressed present persistent challenges for appropriately communicating attribution results to non-specialists.     

Matlab在《运筹学》教学中的应用

本文分析了高校《运筹学》教学方法中的不足,指出了在《运筹学》教学中加入Matlab语言,并且通过实例验证了利用Matlab教学比传统的教学法更有优势,在实际教学中有些具体的指导意义。