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关键词： 国家高新区   绿色创新效率   作用机制   双重差分法  

摘要： 绿色创新作为将环境保护与经济增长有机整合的发展战略,是当前解决城市发展困境的一剂良方,实践中,促进城市绿色创新水平提升成为政界和学界共同关注的话题。国家高新区是推动城市绿色创新水平提升,实现经济可持续发展的重要载体,然而关于国家高新区设立是否对城市绿色创新发展起作用仍需要进一步实证检验。利用中国285个地级市2003—2016年的面板数据,通过构建双向固定效应模型实现双重差分的目的,识别国家高新区建立影响区域绿色发展的作用机制,并评估高新区驱动城市绿色创新效率提升的净效应。研究结果表明:①国家高新区显著提高了城市绿色创新效率,这一结果在经过了反事实检验和多项稳健性检验后依然成立。②从理论上构建了高新区驱动绿色创新效率提升的影响机制,并通过实证检验甄别出了高新区促进城市绿色创新效率提升的创新驱动机制和结构驱动机制,而未通过集聚驱动机制,"形聚而神不聚"的现象仍广泛存在。③高新区驱动绿色创新效率的提升呈现明显的区域异质性,高新区对东部区域的绿色创新效率驱动效果明显,而对中西部区域效果不明显。④高新区驱动绿色创新效率提升还存在着城市等级的差异,一定程度上表现为"边际递减规律",相比于省会城市,副省会城市、较大的市和一般的市从高新区设立当中获得的政策效益更大。为了进一步提升高新区对城市绿色创新水平的驱动作用,文章据此从发挥集聚推动效应、增强自主创新能力、推动产业转型升级、因地制宜发展高新区等方面提出相关政策建议。

关键词： 数字普惠金融   贫困减缓   直接效应   间接效应  

摘要： 目前我国正处于脱贫攻坚关键时期,数字普惠金融对于减缓贫困、缩小城乡差距具有独特优势,是实现乡村振兴的重要支撑力量。我国2011—2018年31个省市有关经济指标的实证检验结果表明,数字普惠金融能够显著地减缓贫困,且具有直接效应和间接效应,即数字普惠金融能够直接减缓贫困,还可通过推动经济增长和改善收入分配间接减缓贫困。另外,数字普惠金融减贫的总效应中绝大部分来自于直接作用的贡献,并且通过促进经济增长减缓贫困的间接效应远大于通过改善收入分配减缓贫困的间接效应。因此,应提高数字普惠金融服务水平,充分发挥数字普惠金融减贫的直接作用,同时推动经济增长,改善收入分配,充分发挥数字普惠金融减贫的间接作用。

关键词： 微生物   检验   合理   用药   医院感染   作用  

摘要： 目的总结并归纳探究微生物检验对临床合理用药及医院感染发生率的作用和影响。方法文章挑选本院2018年2月-2019年2月服用药物的200例患者为对象,将其纳入此次研究。将药物按照时间先后分为对照组(未采用微生物检验)、观察组(采用微生物检验)各100份。对比两组用药结局(医院感染、临床合理用药率)。结果观察两组用药结局,采用微生物检验的观察组医院感染发生率(3.0%)低于对照组(12.0%),临床合理用药率(98.0%)高于对照组(75.0%),有分析价值(χ^2=4.816 9,4.613 7;P=0.031 7,0.021 9 <0.05)。结论微生物检验有利于对临床药物合理性、有效性、是否感染等进行准确掌握,有利于合理用药,预防治疗期间发生医院感染,符合社会要求,有助于医院发展。

关键词： 肝硬化疾病患者   凝血酶原时间   血小板   检验方式  

摘要： 目的主要探讨在诊断是否患有肝硬化疾病患者时,应用凝血酶原时间测定与血小板检验方式是否具有价值,观察并总结经验。方法在我院选取2017年1月至2019年1月间收治的100例肝硬化疾病患者作为观察组,并将同一时间段于我院进行体检后显示健康的人群100例设置为对照组,两组均分别给予凝血酶原时间测定与血小板检验方式。结果观察组血小板分布宽度、凝血酶原时间均高于对照组,血小板计数、血小板分布宽度、血小板压积低于对照组,差异显著(P <0.05)。结论在对肝硬化疾病患者进行诊断时运用凝血酶原时间测定与血小板检验方式所得结果较为显著,具有一定的诊断价值。

关键词： Chemometrics   Ethanol   Ion mobility spectrometry   Food quality   Olive oil classification  

摘要： The usefulness of headspace (HS) -gas chromatography (GC)-ion mobility spectrometry (IMS) has been explored for quantitative purposes, focusing on ethanol in olive oils. For that, since this emerging analytical tool provides a 2D analysis, different calibration curves were built using the height, area and volume of the detected species, i.e. a protonated monomer and a proton-bound dimer of ethanol. The methodology was validated and the quantification results compared to those obtained by GC coupled to more conventional detectors. Once then, the content of ethanol was determined in 81 olive oil samples. The ethanol content was lower than 12 mg/kg for 89% of extra virgin olive oil samples, whereas it was higher than 12 mg/kg for around 90% of virgin olive oil samples. This concentration value was used as a limit to support the decision-making process for olive oil classification into extra virgin, virgin, and lampante olive oil by complementary methods, sensory analysis and chemometrics. In conclusion, the proposed HS-GC-IMS method requires no sample pretreatment, shows low limits of detection (0.095 mg/kg) and quantification (0.100 mg/kg) and is faster enough to monitor the content of this marker in olive oils in the industry.

关键词： Bipartite network   Ranking algorithm   Knowledge structure   Knowledge discovery   Biological entity relation  

摘要： The current study has two objectives. First, we explore the characteristics of biological entities, such as drugs, and their side effects using an author-entity pair bipartite network. Second, we use the constructed network to examine whether there are outstanding features of relations between drugs and side effects. We extracted drug and side effect names from 169,766 PubMed abstracts published between 2010 to 2014 and constructed author-entity pair bipartite networks after ambiguous author names were processed. We propose a new ranking algorithm that takes into consideration the characteristics of bipartite networks to identify top-ranked biological drug and side effect pairs. To investigate the relationship between a particular drug and a side effect, we compared the drug and side effect pairs obtained from the network containing both drug and side effect with those observed in SIDER, a human expert-curated database. The results of this study indicate that our approach was able to identify a wide range of patterns of drug-side effect relations from the perspective of authors' research interests. Further, our approach also identified the unique characteristics of the relation of biomedical entities obtained using an author-entity pair bipartite network. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Crystallographic sphere packing   Hyperbolic reflection groups   Arithmetic groups   Coxeter diagram   Vinberg's algorithm  

摘要： This paper seeks to catalogue and examine crystallographic sphere packings as defined by Kontorovich and Nakamura. There exist at least three sources which give rise to crystallographic packings, namely polyhedra, reflective extended Bianchi groups, and various higher dimensional quadratic forms. When applied in conjunction with the Koebe-Andreev-Thurston Theorem, Kontorovich and Nakamura's Structure Theorem guarantees crystallographic packings to be generated from polyhedra in n = 2. The Structure Theorem similarly allows us to generate packings from the reflective extended Bianchi groups in n = 2 by applying Vinberg's algorithm to obtain the appropriate Coxeter diagrams. In n > 2, the Structure Theorem when used with Vinberg's algorithm allows us to explore whether certain Coxeter diagrams in Hn+1 for a given quadratic form admit a packing at all. Kontorovich and Nakamura's Finiteness Theorem shows that there exist only finitely many classes of superintegral such packings, all of which exist in dimensions n <= 20. In this work, we systematically determine all known examples of crystallographic sphere packings. (C) 2019 Elsevier Inc. All rights reserved.

关键词： 弥漫性血管内凝血   凝血指标   诊断   临床价值  

摘要： 观察在弥漫性血管内凝血诊断中凝血检验指标起到的作用并分析其临床价值。方法 在2018年1月至2019年12月之间在我院进行弥漫性血管内凝血疾病诊疗的患者资料,样本共计20人;并选取我院体检科提供的20名健康体检者的资料作为对照组。对两组人员的凝血指标进行比较,主要包括PT、APTT、TT和FIB的水平检测,并按照国际卫生部门的相关标准,将实验组分为高凝期、低凝期、纤溶期三个分组,进行数据比较分析。 结果 观察组的外源性凝血酶原时间、活化部分凝血酶原时间和纤维蛋白原水平与对照组相比明显偏高,具备统计学意义;观察组国际标准化比值水平比对照组低,具备统计学意义;实验组的三个分组之间数值也具有较大不同,具备统计学意义。结论 在出现弥漫性血管内凝血症状时,患者的凝血检验指标会出现数值上的明显不同,根据数值可以判断出当前疾病的演变状态,对医学诊疗提供依据。

关键词： Agroecology   social capital   smallholder agriculture   Malawi   sub-Saharan Africa  

摘要： The pivotal role of social capital in smallholder agriculture is widely acknowledged. The growth effect of social capital manifests in how networks and trust facilitate access to productive resources and knowledge sharing among farmers. While sub-Saharan Africa is considered a storehouse of rich social capital, recent literature indicates its rapid depletion due mainly to the rise of capitalist agriculture and concomitant reorganization of the relations of production that characterize smallholder agriculture. Agroecology is an alternative approach to agriculture aimed at addressing the adverse impacts of capitalist agriculture, including improving farmer-to-farmer networks. In this paper, we draw on longitudinal data from a five-year participatory agroecology intervention in Malawi using Difference-in-Difference (DID) to compare the social capital endowment of agroecology-practicing households (n = 514) and a control group of non-agroecology households (n = 400). We further employed linear regression to examine the relationship between social capital and agroecology adoption. Results from the DID analysis show a positive and statistically significant change in mean social capital for participatory agroecology households (beta = 0.325, p< 0.001) compared to non-agroecology households (beta = 0.108) after accounting for theoretically relevant factors. Overall, the average treatment effect of the intervention on social capital was positive (beta = 0.217, p< 0.01). We also found a bidirectional relationship between social capital and adoption of agroecology practices (beta = 0.12, p< 0.001). These findings reveal the positive inroads of agroecology beyond the farm-level and demonstrate the potential for policymakers to leverage these benefits to promote sustainable agriculture.

摘要： IBI is the time in milliseconds between heartbeats, with lower IBI indicating faster heart rate. The typical male and female partners showed IBI cycling across all discussions. Cycling was weaker for females during support (vs. control) discussions but was stronger for males during support discussions. [Extracted from the article]