共查询到20条相似文献，搜索用时 531 毫秒
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文章分析制定精确的集装箱场地搬运设备液压油更换标准的必要性,介绍了几种常用的液压油污染度检测方法,并综合比较了这几种方法的优劣,最后根据经验推荐了行之有效的制定液压油更换标准的方法。 相似文献
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在深入研究IEC61850协议的基础上介绍了IEC61850的通信体系及特点,并阐述了作者对IEC61850标准的认知和与目前变电站系统进行比较,综合介绍了本标准应用于数字变电站的优势及存在的问题,使对IEC61850有更深一步认识。 相似文献
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搜索引擎的评价标准及方法研究 总被引：7，自引：0，他引：7
介绍了互联网搜索引擎目前常见的比较研究方法及评价标准，对现行搜索引擎评价标准及方法中的不足进行了分析研究，提出了一些有利于搜索引擎评价标准及方法改进的建议。 相似文献
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针对航迹评价问题,给出一种基于模糊互补判断矩阵的综合评价方法。该方法采用层次分析法的结构,针对每个评价指标,提出划分等级区间的标准和比较尺度,由航迹的实际数据用九标度自动产生模糊互补判断矩阵,通过运算得到针对该指标体系的排序向量,避免了人为因素干扰。通过实例计算说明方法的有效性。该方法也适用于多飞行器协同方案的选择问题。 相似文献
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带有根式的求最值问题,涉及的方法多,知识面广,综合应用性强,学生面对题目,往往难以下手,对方法也不熟练,但是通过整理、比较,学生对这类问题能够很好地掌握,而且在学习的过程中,学生的综合应用能力得到了提高,数学的思维方式得到了培养,思维能力得到了提高。 相似文献
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带有根式的求最值问题,涉及的方法多,知识面广,综合应用性强,学生面对题目,往往难以下手,对方法也不熟练,但是通过整理、比较,学生对这类问题能够很好地掌握,而且在学习的过程中,学生的综合应用能力得到了提高,数学的思维方式得到了培养,思维能力得到了提高。 相似文献
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浙江省水资源评价指标体系研究 总被引：2，自引：0，他引：2
主要研究浙江省水资源评价指标及指标体系的构建,文章介绍了国内外的水资源现状,着重分析了浙江省水资源现状及存在的问题;在对浙江省水资源进行单项指标评价的基础上,结合浙江省水资源、环境和社会经济的现状,将水资源管理纳入社会经济-水资源-生态环境系统中,研究建立了浙江省水资源综合评价指标体系;描述了正效益指标数据和负效益指标数据的无量纲化处理,并利用层次分析法获得了每个指标的权重,通过加权求和方法得到水资源评价的综合指数;采用浙江省2005年和2006年水资源的相关数据,分析计算得到了浙江省各城市的水资源综合评价指数,并对结果进行了横向比较和综合比较分析;根据研究结果,文章指出了制约浙江省水资源可持续利用的原因,并提出了一些改进措施和建议. 相似文献
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通过对<建筑防水涂料试验方法>GB/T16777-2008与1997年旧标准的比较,分析它们之间的不同,详细介绍了新标准中的试验方法.简单分析了不同点中标准变更的思路. 相似文献
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赤字财政引致通货膨胀的实证分析 总被引：1，自引：0，他引：1
持久的赤字财政会引发通货膨胀。我国已持续执行了近30年的赤字财政政策,财政赤字和国债余额迅速上升,本文从赤字财政影响货币供给的角度,实证了赤字财政对通货膨胀的影响,结果表明我国赤字财政政策对通货膨胀的影响程度很小。 相似文献
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Ritu Singh Vijjaya Madhulika Kabra 《Indian journal of clinical biochemistry : IJCB》2006,21(1):147-151
Duchenne muscular dystrophy (DMD) is the most common X-linked disorder in children affecting 1 in 3500 males. Since, as of
now, we have no treatment for DMD, carrier detection and prenatal diagnosis is the most important preventive strategy. Multiplex
PCR helps in rapid detection of hot spot exonal deletions (positive in 65% of cases) as many exons can be identified in a
single run. 10 children with characterstic clinical features of DMD and chorionic villus samples of 10 antenatal patients
with positive family history were studied. We identified a deletion mutation in exon 49 of the dystrophin gene in a 4 yr old
boy referred with signs and symptoms suggestive of DMD using primers for exons 45, 48, 49, 43, 44, 19, 3, 8, 13 and muscle
promoter, subjected to multiplex polymerase chain reaction (PCR) and agarose/Nu-Sieve gel electrophoresis. These genetic methods
aid in prenatal diagnosis of DMD as well as confirmation of diagnosis in children with signs and symptoms suggestive of the
disease.
Work done as WHO fellow in Deptt. of Genetics, All India Institute of Medical Sciences, New Delhi. 相似文献
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Yixin Hu Aili Chen Xinchang Zheng Jun Lu Hailong He Jin Yang Ya Zhang Pinpin Sui Jingyi Yang Fuhong He Yi Wang Peifang Xiao Xin Liu Yinmei Zhou Deqing Pei Cheng Cheng Raul C Ribeiro Shaoyan Hu Qian-fei Wang 《国家科学评论(英文版)》2019,6(3):469
Standard chemotherapy regimens for remission induction of pediatric acute myeloid leukemia (AML) are associated with significant morbidity and mortality. We performed a cohort study to determine the impact of reducing the intensity of remission induction chemotherapy on the outcomes of selected children with AML treated with a low-dose induction regimen plus granulocyte colony stimulating factor (G-CSF) (low-dose chemotherapy (LDC)/G-CSF). Complete response (CR) after two induction courses was attained in 87.0% (40/46) of patients receiving LDC/G-CSF. Post-remission therapy was offered to all patients, and included standard consolidation and/or stem cell transplantation. During the study period, an additional 94 consecutive children with AML treated with standard chemotherapy (SDC) for induction (80/94 (85.1%) of the patients attained CR after induction II, P = 0.953) and post-remission. In this non-randomized study, there were no significant differences in 4-year event-free (67.4 vs. 70.7%; P = 0.99) and overall (70.3 vs. 74.6%, P = 0.69) survival in the LDC/G-CSF and SDC cohorts, respectively. After the first course of induction, recovery of white blood cell (WBC) and platelet counts were significantly faster in patients receiving LDC/G-CSF than in those receiving SDC (11.5 vs. 18.5 d for WBCs (P < 0.001); 15.5 vs. 22.0 d for platelets (P < 0.001)). To examine the quality of molecular response, targeted deep sequencing was performed. Of 137 mutations detected at diagnosis in 20 children who attained hematological CR after two courses of LDC/G-CSF (n = 9) or SDC (n = 11), all of the mutations were below the reference value (variant allelic frequency <2.5%) after two courses, irrespective of the treatment group. In conclusion, children with AML receiving LDC/G-CSF appear to have similar outcomes and mutation clearance levels, but significantly lower toxicity than those receiving SDC. Thus, LDC/G-CSF should be further evaluated as an effective alternative to remission induction in pediatric AML. 相似文献
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《Information processing & management》2020,57(3):102211
Aspect-based sentiment analysis allows one to compute the sentiment for an aspect in a certain context. One problem in this analysis is that words possibly carry different sentiments for different aspects. Moreover, an aspect’s sentiment might be highly influenced by the domain-specific knowledge. In order to tackle these issues, in this paper, we propose a hybrid solution for sentence-level aspect-based sentiment analysis using A Lexicalized Domain Ontology and a Regularized Neural Attention model (ALDONAr). The bidirectional context attention mechanism is introduced to measure the influence of each word in a given sentence on an aspect’s sentiment value. The classification module is designed to handle the complex structure of a sentence. The manually created lexicalized domain ontology is integrated to utilize the field-specific knowledge. Compared to the existing ALDONA model, ALDONAr uses BERT word embeddings, regularization, the Adam optimizer, and different model initialization. Moreover, its classification module is enhanced with two 1D CNN layers providing superior results on standard datasets. 相似文献
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急性白血病的特殊临床表现及误诊分析 总被引：2，自引：0，他引：2
报告了以髓外浸润为特殊临床表现的小儿急性白血病１３例，首发症状为：骨关节、肌肉肿痛，骨折，脊柱畸形，眼球突出，黄疸，腮腺肿大．分析了引起误诊的主要原因及如何减少及避免误诊的体会，强调了早期诊断对改善小儿急性白血病预后的重要性 相似文献
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Stanislava Petrovic Natasa Bogavac-Stanojevic Dragana Lakic Amira Peco-Antic Irena Vulicevic Ivana Ivanisevic Jelena Kotur-Stevuljevic Zorana Jelic-Ivanovic 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(2):262-271
Introduction
Acute kidney injury (AKI) is significant problem in children with congenital heart disease (CHD) who undergo cardiac surgery. The economic impact of a biomarker-based diagnostic strategy for AKI in pediatric populations undergoing CHD surgery is unknown. The aim of this study was to perform the cost effectiveness analysis of using serum cystatin C (sCysC), urine neutrophil gelatinase-associated lipocalin (uNGAL) and urine liver fatty acid-binding protein (uL-FABP) for the diagnosis of AKI in children after cardiac surgery compared with current diagnostic method (monitoring of serum creatinine (sCr) level).Materials and methods
We developed a decision analytical model to estimate incremental cost-effectiveness of different biomarker-based diagnostic strategies compared to current diagnostic strategy. The Markov model was created to compare the lifetime cost associated with using of sCysC, uNGAL, uL-FABP with monitoring of sCr level for the diagnosis of AKI. The utility measurement included in the analysis was quality-adjusted life years (QALY). The results of the analysis are presented as the incremental cost-effectiveness ratio (ICER).Results
Analysed biomarker-based diagnostic strategies for AKI were cost-effective compared to current diagnostic method. However, uNGAL and sCys C strategies yielded higher costs and lower effectiveness compared to uL-FABP strategy. uL-FABP added 1.43 QALY compared to current diagnostic method at an additional cost of $8521.87 per patient. Therefore, ICER for uL-FABP compared to sCr was $5959.35/QALY.Conclusions
Our results suggest that the use of uL-FABP would represent cost effective strategy for early diagnosis of AKI in children after cardiac surgery.Key words: acute kidney injury, cardiac surgery, children, biomarkers, cost effectiveness analysis 相似文献17.
幼儿的道德教育不应该是被动、标准单一的教育,而应该是综合化的教育,儿童的德性品质只能在对自我价值的肯定和对生活的体验中获得发展。只有尊重幼儿的主体性地位、热爱生活的教育才能真正地培养人的德性品质．因为这种教育是最适合幼儿身心发展特点的。 相似文献
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Chetna Bhatt Zarangis Misra Neelam Goyel 《Indian journal of clinical biochemistry : IJCB》2008,23(1):10-16
Mental Retardation is a condition where complex interactions of intrinsic and extrinsic factors hamper mental and sometimes
physical growth of the child during developmental period. This study was carried out to detect cause of Mental Retardation
in 2000 cases of developmental delay by a multidisciplinary team comprising of a Pediatrician, Cytogeneticist, Biochemist,
Psychologist and Speech and Occupational therapists. The causes for developmental delay are broadly divided into Genetic,
Environmental and Idiopathic (no specific cause found) factors. The complete diagnosis was possible in 1192(60%) cases. Genetic
factors were found in 477(23.8%) cases and environmental factors covered 692(34.6%) cases as a cause of retardation. The most
common genetic cause is chromosomal abnormalities which were found in 355 (17.75%) cases. Another major group comprising of
122 (6.1%) cases was that of the disorders which follow Mendelian inheritance. Autosomal recessive conditions, which covers
majority of metabolic disorders, are detected in 48(2.4%) cases. During this screening the most common inherited metabolic
condition detected is Mucopolysaccharidosis, a Lysosomal Storage Disorder followed by Amino acid abnormalities like Phenylketonuria,
Alkaptonuria and Tyrosinuria. 相似文献
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IAD患者的生理机能、情绪认知和社会适应等过程均受明显的损害,但人们并不完全清楚IAD的发生机制。本文认为IAD是以易感性生理、心理为基础,在特定社会环境之下诱发的一种病理性行为,三者互为影响。本文主要综述IAD的生理病理研究进展状况。 相似文献
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培智音乐课程标准指出:“信息时代的多媒体教学扩展了现代特殊教育教学的资源,是特殊教育的有效辅助手段。教师应努力掌握现代信息技术,针对学生的个体差异,利用现代教育技术的优点为教学服务。”微视频通过声音和图像的刺激,更容易吸引培智儿童的注意力,激发培智儿童的学习热情,增强课堂的趣味性和生动性,从而有效提升培智儿童的音乐素养。该文从微视频直观动态的优势入手,对在培智儿童音乐课堂中如何善用、巧用、活用、妙用微视频有效开展教学进行探析。 相似文献