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关键词： 工程招标   合同管理   问题成因   解决方法  

摘要： 我国的经济发展日新月异,各种法律法规的建设也日趋成熟,在工程方面也出台了规范的法律系统,为工程招标和合同管理上提供了法律的支撑,但还是有一些因素导致了工程招标与合同管理方面存在问题,为了工程建设的良性发展就要找到这些问题的成因和解决方法。

关键词： 干化学法   尿沉渣   联合   尿常规检验   作用  

摘要： 目的对干化学法与尿沉渣联合用于尿常规检验的作用进行探究和分析。方法随机挑选在本院进行尿常规检验的患者75例,纳入时间2017年5月-2018年4月,随机分为A组、B组和C组,各25例,分别应用干化学法检验、尿沉渣法检验、干化学法与尿沉渣联合检验,对比三组检验结果和检验错误率。结果 A组检验定量红细胞阳性概率比B组高,B组检验定量白细胞阳性概率比A组高,而C组检验定量红细胞和白细胞阳性概率均明显高于B组与A组,且C组检验错误率明显低于A组和B组(P<0.05)。结论在尿常规检验中应用干化学法与尿沉渣联合,很大限度上能提升白细胞和红细胞的阳性概率,降低检验错误率,具有提高尿常规检验精准性的作用。

关键词： 合同约定   理财产品  

摘要： '你不理财,财不理你',近年来,很多人通过理财实现了财产的保值增值,获得了可观收益,也有人因为种种原因损失惨重。山东省的王女士反映称,2015年她购买了山东省国际信托有限公司(以下简称山东信托)负责管理的理财产品,由于山东信托没有及时信息披露,履行告知约定,使得她在不知情的情况下损失近千万元。

关键词： 生化检验指标   糖尿病肾病   早期诊断  

摘要： 目的:探讨糖尿病肾病早期诊断中生化检验指标的作用。方法:2018年1-5月收治糖尿病肾病患者50例作为观察组,并选取同时期健康体检者50例作为对照组。对比两组生化检验指标。结果:观察组C反应蛋白(CRP)、血清胱抑素C(CysC)、糖化血红蛋白(HbA1c)、血肌酐(Cr)以及尿微量白蛋白(MAU)与对照组相比较均明显升高,差异有统计学意义(P<0.05)。结论:糖尿病肾病应用生化检验指标可进行早期疾病诊断,具有较高的应用价值,值得临床推广。

关键词： 食品理化检验箱   中毒检品   有机磷农药   措施   作用  

摘要： 目的浅析应用食品理化检验箱快速确证中毒检品中有机磷农药的措施及作用。方法通过食品理化检验箱对有机磷农药中毒患者进行有机磷农药的相关检测。结果对比后发现,患者所服用的馒头提取液显示为浅青色,面粉提取液显示为青色,证明两种物质中均含有一定浓度的有机磷农药,且馒头中有机磷农药的浓度高于面粉。证明食品理化检验箱能准确且快速的检测中毒检品中的有机磷农药。结论对食物中毒患者进行检测时,食品理化检验箱能准确检测出中毒检品中的有机磷农药,且检测速度较快,操作简单,患者接受能力较强,值得推广应用。

关键词： Semi-supervised classification   Graph optimization   Weighted samples   Hard-to-cluster index  

摘要： Graph-based semi-supervised classification (GSSC) takes labeled and unlabeled samples as vertices in a graph, and edge weights as the similarity between samples. Most GSSC methods handle each labeled sample as equally important in the graph, and they mainly focus on optimizing the graph to improve the performance. In fact, samples are not always evenly distributed. Labeled samples close to the decision boundary of different classes are generally more important than labeled samples far away from the boundary. To account for the different importances, we propose an approach called Weighted Samples based Semi-Supervised Classification (WS3C for short). WS3C firstly executes multiple clusterings on the dataset to explore the structure of samples and summarizes these clustering results. Second, it quantifies the hard-to-cluster index of each labeled sample with respect to other samples based on the summarized results and employs the index to weight that sample. Next, it constructs a graph whose edge weights are equal to the frequency of two samples grouped into the same clusters in multiple clusterings. After that, it performs semi-supervised classification based on the constructed graph and weighted samples. Empirical study on synthesized and real datasets demonstrates that assigning labeled samples with different weights significantly improves the accuracy than equally treating labeled samples. WS3C not only has better performance than other related comparing methods, but also is robust to the input parameters. (C) 2019 Elsevier B.V. All rights reserved.

关键词： North America   Metals   Technological style   Craft production   Colonialism  

摘要： This article presents results of attribute analysis of copper-base metal artifacts from early colonial upper Great Lakes archaeological contexts. Patterns of variation were identified, providing evidence for cultural and technological heterogeneity in the production methods and uses of such objects through time at a regional scale. Interrelated factors that influenced observed artifact attributes include contexts of use and deposition, sociallystructured trading partnerships causing differential availability of raw material, and aesthetic preferences of craftworkers or their communities. Results demonstrate the utility of comparing technological practices evident in diverse material assemblages to investigate regional-scale interaction in contexts of colonialism and intercultural contact.

摘要： Australia's economy, like most national economies, is made up of several regional sub-economies. How these regional economies interact is not well understood but is relevant to macroeconomic policy setting. We outline and estimate a flexible Global Vector Autoregression model using quarterly data on house prices, output, unemployment and population for the eight Australian states and territories from 1986 to 2016. Using region-to-region impulse response functions from this model we quantify the influence of shocks in one region on another. Our results highlight the high degree of influence of New South Wales on other regions over and above its size.

关键词： Photosystem II   Water splitting complex   Excitation-emission fluorescence   PARAFAC   Unsupervised classification   pH  

摘要： The potential of excitation-emission fluorescence spectroscopy combined with three-way analysis was investigated for discriminating the photosystem II (PSII) (with the water-oxidizing complex) and without the water-oxidizing complex (wPSII) using unsupervised classification methods. The water-oxidizing complex within PSII carry out the reaction of water splitting which is as a vital process on the earth. Therefore, discriminating the presence of the water-oxidizing complex in protein samples is crucial. Low cost and accurate spectroscopic determination of the amount of clusters inside PSII or any other protein containing species are important when investigating the inclusion and exclusion of such clusters into and from species. Fluorescence data of samples were similar, and we showed the potential usefulness of multivariate methods, such as parallel factor analysis (PARAFAC) and principal component analysis (PCA) for recognition of the two types of samples. Both techniques were applied to the excitation-emission fluorescence matrices (EEM) of solutions at two of different pH values (2.0 and 12.0). Three fluorescent components were found for all samples that are related to tyrosine (Tyr), tryptophan (Trp) and phenylalanine (Phe) amino acids. These three amino acids are representative of all datasets and indicate their similarities and differences. We then found the effectual wavelengths for separation of samples in a specific acidity, including the excitation wavelengths of 220 and 230 nm and the emission wavelengths of 300 and 305 nm. The acidity of the solutions has various influences on the conformation of proteins. In PSII and PSII the without water-oxidizing complex samples conformational changes can change their spectra which was applied for discrimination purpose. This separation was better in pH = 12.0. We also showed the effect of time on small conformational changes within datasets were higher in pH = 2.0. In the end, for indicating the high distribution of

关键词： Cutinase   Depolymerization   Terephthalic acid   PET recycling   Humicola insolens  

摘要： The dissemination of technologies for poly(ethylene terephthalate) (PET) recycling is of paramount importance in the context of the plastics circular economy. One of the most promising alternatives is to use enzymes as catalysts for PET depolymerization to its monomers, but this route still needs improvement, especially regarding titer and productivity. In the present work, a sequential approach comprised of fractional factorial and central composite rotatable designs, the path of steepest ascent and one-way evaluation of variable effect, was performed to address these limitations, during assorted post-consumer PET (PC-PET) hydrolysis catalyzed by Humicola insolens cutinase. The highest terephthalic acid concentration and productivity during PC-PET hydrolysis were 100.9 mM (16.8 g/L) and 14.4 mM/day, corresponding to overall improvements of 10-fold and 20-fold, respectively. These data are among the best results described so far for enzyme-catalyzed hydrolysis of used PET packages. Also, the use of a single enzyme system, instead of multiple biocatalysts to achieve final conversion of PET to its monomers, lowers the process complexity and costs.