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关键词： 输血检验   质量控制   不良反应  

摘要： 目的探讨加强输血检验的质量控制在减少输血不良反应发生的作用。方法选取2017年1月~2018年12月收治的输血患者500例,将2017年1~12月收治的患者250例设为对照组,2018年1~12月收治的患者250例设为观察组。对照组接受常规输血检验质量管理,观察组加强输血检查的质量控制工作,比较两组输血不良反应发生情况和输血检验质量控制评分。结果干预后,观察组输血检验质量控制评分高于对照组,输血不良反应发生率低于对照组,差异有统计学意义(P<0.05)。结论通过加强输血检验的质量控制可有效减少输血不良反应的发生,从而使输血安全得到保障。

关键词： 现场金相检验   承压类   特种设备   检验  

摘要： 检验是应用承压类特种设备前的重点工作。以现阶段特种设备产生情况为依据,结合近年来现场金相检验技术应用特点,明确新时代发展对承压类特种设备提出的要求,分析现场金相检验在承压类特种设备检验中的作用,并提出有效的应用措施,以此为各行发展提供有效依据。

关键词： ATR-FTIR spectroscopy   ECM sample   SIMCA   BNN   CP-ANN   GA  

摘要： Attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy coupled with chemometric procedures was utilized to examine embryo culture medium (ECM) samples in in vitro fertilization (IVF) to differentiate between positive and negative pregnancy. Principal component analysis (PCA) method was successfully applied to mid-IR spectra as outlier detection by application of Hotelling T-2 statistic procedure. Unsupervised and supervised pattern recognition techniques, such as hierarchical agglomerative cluster algorithm (HACA), soft independent modeling of class analogy (SIMCA) as a linear supervised pattern recognition technique, binned nearest neighbors (BNN) as a local classifier and counter-propagation artificial neural networks (CP-ANN) as a non-linear technique were used in spectral data analysis for classification and differentiation. Also, the genetic algorithm (GA) as the variable reduction was employed to develop the diagnostic model. A total of 46 ECM samples were examined in the 3000-1000 cm(-1) spectral region. Classification efficiency parameters including accuracy (ACC), error rates (ER), sensitivity (Sens), specificity (Spec) and non-error rate (NER) were calculated. Classification ACC of 92.00% and ER of 8.300% was acquired using GA-BNN algorithm, while GA-CP-ANN and GA-SIMCA algorithms provided 93.00% and 5.00% of ACC and ER for the test set, respectively. The results of this study presented that the GA-SIMCA and the GA-CP-ANN chemometric approaches using the infrared data, achieved acceptable results. Also, both of methods could provide the Sens rate of 100.00% and 91.00%, and the Spec rate of 91.00% and 100.00% for positive pregnancy samples (class 1) and negative ones (class 2) in prediction test, respectively. In general, the main advantages of the proposed method could be represented as a reliable, fast, simple, and accurate method for the classification and discrimination of the ECM samples based on their serum beta- subunit human

关键词： hyperspectral imaging   label-free diagnosis   computer-aided diagnosis   deep learning   convolutional neural network   hepatocellular carcinoma  

摘要： Pathological diagnosis plays an important role in the diagnosis and treatment of hepatocellular carcinoma (HCC). The traditional method of pathological diagnosis of most cancers requires freezing, slicing, hematoxylin and eosin staining, and manual analysis, limiting the speed of the diagnosis process. In this study, we designed a one-dimensional convolutional neural network to classify the hyperspectral data of HCC sample slices acquired by our hyperspectral imaging system. A weighted loss function was employed to promote the performance of the model. The proposed method allows us to accelerate the diagnosis process of identifying tumor tissues. Our deep learning model achieved good performance on our data set with sensitivity, specificity, and area under receiver operating characteristic curve of 0.871, 0.888, and 0.950, respectively. Meanwhile, our deep learning model outperformed the other machine learning methods assessed on our data set. The proposed method is a potential tool for the label-free and real-time pathologic diagnosis. (c) 2019 International Society for Advancement of Cytometry

关键词： Psychosis   Auditory verbal hallucinations   Voice hearing   Network analysis   Experience sampling method  

摘要： Background: Identifying variables that influence daily-life fluctuations in auditory verbal hallucinations (AVHs) provides insight into potential mechanisms and targets for intervention. Network analysis, that uses time-series data collected by Experience Sampling Method (ESM), could be used to examine relations between multiple variables over time. Methods: 95 daily voice-hearing individuals filled in a short questionnaire ten times a day for six consecutive days at pseudo-random moments. Using multilevel vector auto-regression, relations between voice-hearing and negative affect, positive affect, uncontrollable thoughts, dissociation, and paranoia were analysed in three types of networks: between-subjects (between persons, undirected), contemporaneous (within persons, undirected), and temporal (within persons, directed) networks. Strength centrality was measured to identify the most interconnected variables in the models. Results: Voice-hearing co-occurred with all variables, while on a 6-day period voice-hearing was only related to uncontrollable thoughts. Voice-hearing was not predicted by any of the factors, but it did predict uncontrollable thoughts and paranoia. All variables showed large autoregressions, i.e. mainly predicted themselves in this severe voice-hearing sample. Uncontrollable thoughts was the most interconnected factor, though relatively uninfluential. Discussion: Severe voice-hearing might be mainly related to mental state factors on the short-term. Once activated, voice-hearing appears to maintain itself. It is important to assess possible reactivity of AVH to triggers at the start of therapy;if reactive, therapy should focus on the triggering factor. If not reactive, Cognitive Behavioural interventions could be used first to reduce the negative effects of the voices. Limitations are discussed. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Blockchain   Smart contracts   Formal methods   Verification   Systematic review  

摘要： Blockchain as a distributed computing platform enables users to deploy pieces of software (known as smart contracts) for a wealth of next-generation decentralized applications without involving a trusted third-party. The advantages of smart contracts do, however, come at a price. As with most technologies, there are potential security threats, vulnerabilities and various other issues associated with smart contracts. Writing secure and safe smart contracts can be extremely difficult due to various business logics, as well as platform vulnerabilities and limitations. Formal methods have recently been advocated to mitigate these vulnerabilities. This paper aims to provide a first-time study on current formalization research on all smart contract-related platforms on blockchains, which is scarce in the literature. To this end, a timely and rigorous systematic review to examine the state-of-the-art research and achievements published between 2015 and July 2019 is provided. This study is based on a comprehensive review of a set of 35 research papers that have been extracted from eight major online digital databases. The results indicate that the most common formalization technique is theorem proving, which is most often used to verify security properties relating to smart contracts, while other techniques such as symbolic execution and model checking were also frequently used. These techniques were most commonly used to verify the functional correctness of smart contracts. From the language and automation point of views, there were 12 languages (domain specific/specification/general purpose) proposed or used for the formalization of smart contracts on blockchains, while 15 formal method-specific automated tools/frameworks were identified for mitigating various vulnerabilities of smart contracts. From the results of this work, we further highlight three open issues for future research in this emerging domain including: formal testing, automated verification of smart contra

关键词： Surface tension  

摘要： Many researches have been performed on the phenomenon of vapor condensation at the hypersonic stages of the steam turbine. This phenomenon consists of nucleation and droplet growth consequently. One of the most important parameters affecting the nucleation and droplet growth is surface tension, which is often assumed to be equal to the surface tension of a planar interface. The nucleated droplets have the nano-scale size at the beginning of the process and they will not be bigger than macro-scale after the growth. On the other hand, there are many reports about the dependency of surface tension on the curvature of the surface in such a small size. In order to evaluate the effects of curvature dependency on the surface tension, three famous models, proposed by Tolman, Benson and Rasmussen, were incorporated with nucleation theory and their effects on the wet steam flow were investigated. The results revealed that the dependency of the surface tension on the droplet radius significantly improved the accuracy of the predicted droplet radius. Also, it was shown that Tolman's theory have offered the best results.

关键词： Milk   Multivariate analysis   Physicochemical analysis   CART  

摘要： Classification and regression tree (CART) analyses have not been explored yet in the field of food physicochemical analysis, to the best of our knowledge. In this work, we tested its classification performance on a set of physicochemical data from raw milk samples from Southern Brazil we already analyzed via well-known supervised methods in a previous work. CART performed better than most of the previously employed methods regarding specificity, sensitivity, and accuracy when classifying samples from the training set. These findings suggest CART could also be employed to classify milk samples as compliant or not to Brazilian regulations and possibly to other countries' regulations as well.

关键词： CPE   Screening   Rectal swabs  

摘要： An OXA-181 producing Escherichia coli isolate that went recurrently undetected directly from rectal swab sample using Xpert (R) Carba-R, was successfully detected using ertapenem supplemented broth enrichment followed by culture-based method. Our data suggest that implementation of culture-based methods plus enrichment might be crucial for the efficient screening of patients considered to be at "high-risk" of colonization with carbapenemase producers and who are colonized at low level. (C) 2019 Elsevier Inc. All rights reserved.

关键词： 痕迹鉴定   证据依据   侦查破案  

摘要： 对于痕迹的检验鉴定在事故鉴定或者侦查破案都有不可估量的作用.一旦有刑事案件的发生必将伴随着作案的痕迹,对于痕迹的检验鉴定无论是提供证据依据还是对破案都有着积极的作用,本文结合实践对痕迹检验鉴定在侦察破案中的证据作用进行了简单分析和研究.