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关键词： 慢性心力衰竭   红细胞检验   红细胞分布宽度(RDW)   检验   血常规  

摘要： 目的浅谈慢性心力衰竭患者红细胞检验的临床应用价值。方法从我院2014年3月-2016年3月期间收治的患者中抽取具有完整病历资料的150例慢性心力衰竭患者分为A、B、C三组,分别是Ⅱ级心力衰竭组、Ⅲ级心力衰竭组与Ⅳ级心力衰竭组三组,另选取60例正常体检者作为D组(对照组),四组患者均行红细胞检查,以观察其与心力衰竭的关系。结果 D组患者的红细胞分布宽度(RDW)明显不及ABC三组慢性心力衰竭组,红细胞分布宽度(RDW)随心力衰竭等级的增高而增大,红细胞分布宽度(RDW)越大病死率便越高,组间比较差异显著(P<0.05)。结论红细胞分布宽度(RDW)决定了慢性心力衰竭患者的心功能等级水平,且患者红细胞检验后,可为其远期预后提供评判指标,具有较高的临床应用价值。

关键词： Bicycle   Active living research   Built environment   Choice-based conjoint   Sawtooth   Preferences   Physical activity   Infrastructure   Route choice  

摘要： Installing cycling infrastructure well-separated from motorized traffic is hypothesized to increase children's transportation cycling. However, in some streets it may not be possible to install such cycling paths (e.g. due to financial or space constraints). The current paper investigates which physical factors could increase parents' perceptions of environmental supportiveness for children's transportation cycling, across six different types of cycling infrastructure. Parents completed a choice-based conjoint task by indicating which photographed street they preferred to let their child cycle along. The streets were experimentally manipulated on 7 physical factors (e.g. traffic speed, vegetation). Interactions between type of cycle path and the other environmental factors were identified. When no or limited separation from motorized traffic is present, street characteristics increasing parents' safety perceptions (traffic density and speed) should be prioritized when aiming to improve the supportiveness of streets for children's transportation cycling. Comfort and aesthetics can further improve streets' environmental supportiveness when cycling paths are more separated from traffic.

关键词： Sampling  

摘要： The problem of analyzing various methods for the formation of the classified training sample that ensure the effective operation of the automatic compensator for active interferences with simultaneous presence of passive interference is solved in this paper. For the first time an adaptive method for the formation of the classified training sample based on the use of threshold estimation of the interchannel correlation coefficient of the combined interference is proposed. An adaptive method for the formation of the classified training sample based on the current interval estimation of the distribution of the passive component of the combined interference in range (time) is also proposed. The method provides an estimation of the coefficient of interchannel correlation with the selection of the maximum value and its utilization for the formation of weight coefficients in the following probing period. Experiment in the testing ground is conducted with a quantitative estimation of the cancellation ratio of active interference for the formation of the classification sample using spectral differences in the structure of active and passive interferences. © Allerton Press, Inc., 2018.

关键词： Land-cover mapping   Classifier accuracy assessment   Image classification   Image heterogeneity  

摘要： A major issue in land cover mapping is classifier selection. Here we investigated classifier performance under different sample sizes, reference class distribution, and scene complexities. Twenty six 10 km x 10 km blocks with complete reference information across the continental US are used. Per-pixel classification took place using six spectral bands from Landsat imagery. The tested classifiers included Naive Bayes (NB), Support Vector Machine (SVM), K-Nearest Neighbor (KNN), Bootstrap-aggregation ensemble of decision trees (BagTE), artificial neural network up to 2 hidden layers, and deep neural network (DNN) up to 3 hidden layers. For the entire block, our accuracy assessment indicated that all classifiers, with the exception of NB (a Maximum Likelihood variant), performed similarly. However, when we concentrated on edge pixels (pixels at the border of adjacent land cover classes), it was clear that the SVM and KNN offer considerable accuracy advantages, especially for larger reference datasets. Because of their relatively low execution times SVM and KNN would be recommended for classifications using Landsat's spectral inputs and Anderson's 11-level classification scheme. However, both SVM and KNN demonstrated substantial accuracy degradation during the parameter grid search. For this reason, an exhaustive parameter optimization process is suggested. While the ANN and DNN neural network variants did not perform as well, their performance may have been restricted by the lack of rich contextual information in our simple six band per-pixel input space. The effect of class distribution in the training dataset was also evident on the calculated accuracy metric. Gradual accuracy degradation as edge pixel presence increased was also observed. Future work could focus on data-rich classification problems such as change detection using Landsat stacks or expand in high spectral or spatial resolution sensors.

关键词： ELISA法   梅毒螺旋体感染   临床检验   TRUST检测  

摘要： 目的:在诊断梅毒螺旋体感染中应用ELISA法进行临床检验,分析ELISA法的检验作用。方法:选择梅毒螺旋体感染患者80例,选择时间:2016年7月2017年7月,先后进行TRUST检测和ELISA法检测,经SPSS21.0系统软件分析检测方式的诊断阳性率。结果:经SPSS21.0系统软件分析可得:ELISA法检测的诊断阳性率（96.25%）明显高于TRUST检测的诊断阳性率（75.00%）,P<0.05,差异显著。结论:ELISA法在诊断梅毒螺旋体感染中的临床检验作用显著,其临床诊断阳性率较高。

关键词： 生化检验指标   糖尿病肾病   诊断  

摘要： 目的:研究生化检验指标在早期糖尿病肾病患者诊断中的应用.方法:选择我院2017年3月-2018年3月收治的50例糖尿病肾病患者为研究对象,命名为实验组,同时选择我院同期体检的50例健康体检者作为对照组.比较两组患者血清中α1-微球蛋白、尿清蛋白/肌酐、C-反应蛋白、糖化血红蛋白、血清胱抑素C指标含量.结果:通过实验组和对照组的各项生化检验指标数据比较可得,实验组α1-微球蛋白、尿清蛋白/肌酐、C-反应蛋白、糖化血红蛋白、血清胱抑素的指标含量均显著高于对照组,差异有统计学意义(P<0.05).结论:在临床上采用α1-微球蛋白、尿清蛋白/肌酐等生化检验指标对于辅助诊断早期糖尿病肾病具有重大意义.

关键词： 心脑血管疾病   预后   凝血功能  

摘要： 目的:探讨判定心脑血管疾病预后中检验凝血功能的价值.方法:依据凝血功能检验结果 ,分85例心脑血管疾病为2组,42例检验结果3个及以上指标异常为A组,43例检验结果3个以下指标异常或未见异常为B组,对照两组具体检验结果 、预后.结果:入院时 、入院后的第48、96小时,A组患者PT、APT T、T T、D-D均明显较B组高,FIB显著较B组低,P<0.05;B组93.02％ 好转出院,相较于A组的69.05％ 显著较高,且B组病残率较A组低,P<0.05;A组3例患者处于植物状态,1例患者死亡,B组未出现植物状态与死亡患者.结论:心脑血管疾病患者预后的判断可通过凝血功能检验进行,凝血功能检验异常指标越多,则预后越差.

关键词： 创造力   COMT基因   母亲教养方式   基因—环境交互作用   不同易感模型  

摘要： 创造力不仅是社会发展的重要推动力,也是个体发展不可或缺的能力。创造力研究者早期多关注后天环境因素对个体创造力的影响,其中对个体的早期生活环境的研究最为广泛。而母亲作为教育子女任务的主要承担者,其教养方式对子女创造力具有重要的影响,因此一直备受关注。但相关研究结果并不一致,这提示我们教养方式对个体创造力的影响可能受到了其他因素的调节作用。近年来,随着分子遗传学的发展,创造力研究者们也开始关注分子水平上的创造力遗传机制以及基因与环境的交互作用。多巴胺通路中的COMT基因,因其与创造力有关的认知功能关系密切,而成为创造力分子遗传学研究的重要候选基因。因此,本研究选取母亲教养方式为环境变量,COMT基因为候选基因,考察基因(COMT基因)与环境(母亲教养方式)对个体创造力的交互作用,并进一步检验基因与环境的交互作用是否符合不同易感模型。本研究的被试为421名健康且无血缘关系的汉族大学生。在被试知情同意的前提下,首先通过采集被试静脉血液的方式进行DNA提取和基因分型。然后分别使用发散思维测验和父母权威问卷(PAQ)考察被试的创造力和母亲教养方式。具体研究结论如下:***基因与母亲教养方式的交互作用对个体创造力的影响:(1)COMT rs4818、rs6269、rs4646312、rs5993883位点与母亲权威型教养方式对女性被试创造力的流畅性/灵活性/独创性的交互作用均显著,具体表现为母亲权威型教养方式显著正向预测rs4818 GG基因型、rs6269 GG基因型、rs4646312 CC基因型、rs5993883 GG基因型的女性被试的创造力流畅性/灵活性/独创性。(2)COMT rs4818、rs6269、rs4646312位点与母亲放任型教养方式对男性被试创造力灵活性的交互作用均显著。***基因与母亲教养方式交互作用的模型检验:(1)COMT rs4818、rs6269、rs4646312位点与母亲权威型教养方式对女性被试创造力的流畅性/灵活性/独创性的交互作用模式均符合不同易感模型,具体表现为携带rs4818 GG、rs6269 GG基因型、rs4646312 CC基因型的女性被试,在较高的母亲权威教养环境下表现出更高的创造力流畅性/灵活性/独创性,但在较低的母亲权威教养环境下表现出更低的创造力流畅性/灵活性/独创性。(2)COMT rs5993883位点与母亲权威型教养方式对女性被试创造力的流畅性/灵活性的交互作用模式均符合不同易感模型,具体表现为携带rs5993883 GG基因型的女性被试,在较高的母亲权威教养环境下表现出更高的创造力流畅性/灵活性,但在较低的母亲权威教养环境下表现出更低的创造力流畅性/灵活性。

关键词： 供用电合同电力营销作用  

摘要： 在我国飞速发展的今天,电力资源已经成为人民日常生活中的必须资源,电力的使用量在逐年的提升.如何让电力的使用可以更加规范,保障用电用户与供电企业双方的利益,是当前电力行业发展过程中应进行重视的问题.本文浅析在新形式下供用电合同在电力营销管理中的地位和作用.

关键词： 检验科   医院感染   预防   管理措施  

摘要： 目的:探讨检验科在预防医院感染中的作用,提出加强实验室的管理和宣传教育等措施.方法:根据分析近三年来我院消毒灭菌合格率表和探讨预防医院感染的相关措施.结果:加强对医院消毒工作的管理来降低院内感染率是有实际意义的.结论:加强预防措施,可有效地防止院内感染.