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逐个清点物种

世界科学 1992年第3期 18-20页

作者： Nigel Stork Kevin gaston 吴琦

生物学家们不可能将地球上每一现存物种都发现并命名完毕。但他们在觉得奇怪之前还有很长的路要走。

关键词：物种生物学家地球分类学家标本行星热带森林自然博物馆自然历史博物馆动物群生物区系动物区系

Contribution to Harmonic Depollution Control by the Use of Adaptive Hybrid Filter Type TLC: Case of Control by Modulated Hysteresis

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Energy and Power Engineering 2020年第10期12卷 578-602页

作者： Luc Vivien Assiene Mouodo Jean gaston Tamba Olivier Sosso Mayi Antoine Hanna Nohra Lawren Bibaya Maurice Fadel Hadi Kanaan Laboratory of Modeling Materials and Methods of the National Higher Polytechnic School Douala University Douala Cameroon Institute of Technology Douala University Douala Cameroon Higher Normal School of Technical Education Douala University Douala Cameroon Faculty of Engineering—ESIB St-Joseph University Beirut Lebanon Université de Toulouse INPT UPS ENSEEIHT Toulouse France CNRS LAPLACE F-31071 Toulouse France School of Electrical and Electronic Engineering University Beijing China

In this article, we propose a topology of a TLC-HAPF power filter as a harmonic compensator for an optimization of the pollution control of electrical networks. This filter consists of an active part and a passive part in order to reduce or limit switching losses during current injection into networks thanks to its TLC module. This topology also provides solutions dynamic performance issues, resonance and lack of compensation capacity for imbalance cases. It also offers a greater range of compensation than conventional active models which do not offer as well as an intermediate circuit voltage in the order of 105 V to 109 V relatively lower than others models (600 v). A modulated hysteresis control of this topology is therefore also developed in this article and allows to obtain a network analysis on the three phases at three levels: source side, load side, and finally at the connection of the filter to the network, allowing to specify for these different positions the value of the current spectrum and its THD at this well-defined moment.

关键词： Hybrid Adaptive Active Filter Modulated Hysteresis THD Harmonic Pollution Control

Jaundice in the Newborn at the Teaching Hospital of Brazzaville

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Open Journal of Pediatrics 2019年第2期9卷 111-118页

作者： gaston Ekouya Bowassa Giresse Tsouassa Wa Ngono Neli Yvette Ngakengni Engoba Moyen Koumou Onanga Steve Missambou Mandilou Georges Moyen Faculty of Health Sciences Marien NGOUABI University of Brazzaville Brazzaville Congo Department of Neonatology University Hospital of Brazzaville Brazzaville Congo Department of Biochimy University Hospital of Brazzaville Brazzaville Congo

Introduction: Jaundice is a major symptom during neonatal time. It is defined by a bilirubin ≥ 50 mg/l. Objectives: To determine the frequency of neonatal jaundice at the Brazzaville University Hospital, to determine the main etiologies, to evaluate the management, to specify the evolution. Patients and Method: It was a prospective and descriptive study that was conducted in the Neonatology Department and Biochemistry Laboratory of the University Hospital of Brazzaville, from 1st August 2015 to 31st July 2016. It included newborn children admitted into the neonatal unit for treatment of jaundice. The variables studied were epidemiological, clinical, etiological therapy and outcome. Results: The frequency of the neonatal jaundice is 7.2%. The hyperbilirubinemia as not conjugated was found in 99.1% of cases. The main causes are bacterial neonatal infection n = 102 (47.9%), the physiological icterus n = 46 (21.6%) and the ABO incompatibility n = 40 (18.8%). The treatment consists of the phototherapy in all cases. Each phototherapy session lasts 3 hours n = 99 (56.9%), 6 hours n = 58 (33.3%) and 12 hours n = 17 (9.8%). The average duration of the administering of the therapy is of 3 ± 2 days. Hyperbilirubinemia encephalopathy occurred in 62 (29.1%) cases, including 49 cases of kernicterus. The death occurred in 70 (32.9%) children. Conclusion: The importance and the gravity of the neonatal jaundice require primary preventive means based on proper care in pregnancy and the birth. While the secondary prevention includes high index of suspicion, comprehensive diagnostic equipment availability to prevent acute bilirubin encephalopathy.

关键词： Jaundice Neonatal Phototherapy Bilirubin Encephalopathy

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陆地大地电磁观测技术的进展

国外地质勘探技术 1986年第9期 37-40页

作者： gaston Fischer 张学民

本文介绍了大地电磁观测方法的三个最新进展。即超导量子干涉器件磁力仪的应用,远磁场参考方法及计算机和微机的应用。一、超导量子干涉器件磁力仪的应用超导量子干涉器件磁力仪是一种超导量子干涉器件,它直接测量磁场、而不是测量磁场... 详细信息

本文介绍了大地电磁观测方法的三个最新进展。即超导量子干涉器件磁力仪的应用,远磁场参考方法及计算机和微机的应用。一、超导量子干涉器件磁力仪的应用超导量子干涉器件磁力仪是一种超导量子干涉器件,它直接测量磁场、而不是测量磁场随时间的变化率。该仪器的主要优点是

关键词：大地电磁磁场电磁场磁强计测磁仪器磁力仪大地电磁测探大地电磁法大地电磁测深线性滤波器测站大地电流互功率谱近似式超导器件超导量子干涉器件转换张量

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用于液晶显示屏的经济可靠技术

电子设计技术 EDN CHINA 2012年第10期19卷 64-65页

作者： Martin Lienhard gaston Roth Michael Weyrauch 恩智浦半导体产品市场部

COG（Chip On Glass）的价值定位如今，很多液晶显示器都通过连接一个带封装的液晶驱动器IC实现显示功能，其通过印刷电路板（PCB）进行物理昆示（见图1a）。这个概念（后文称为“表面贴装器件”或SMD概念）提供了一个坚固的机械解决方... 详细信息

COG（Chip On Glass）的价值定位如今，很多液晶显示器都通过连接一个带封装的液晶驱动器IC实现显示功能，其通过印刷电路板（PCB）进行物理昆示（见图1a）。这个概念（后文称为“表面贴装器件”或SMD概念）提供了一个坚固的机械解决方案，但要求更复杂及区域聚集的PCB设计。

关键词： COG液晶屏 COG模块显示驱动器恩智浦半导体NXP

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水与梦

The Fate of Newborns Delivered through Cesarian Section at Brazzaville University Hospital

2019年

作者： gaston Bachelard[]

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Open Journal of Obstetrics and Gynecology 2019年第7期9卷 1073-1082页

作者： Jean Alfred Mbongo Gickelle Bitsene Mpika Peggy Mawandza Delvie Ardèche Bitsangou gaston Ekouya Bowassa Clotaire Itoua Leon Herve Iloki Obstetrical Gynecology Department Brazzaville University Hospital Brazzaville Congo Polyvalent Resuscitation Department Brazzaville University Hospital Brazzaville Congo Neonatology Department Brazzaville University Hospital Brazzaville Congo

Objectives: To assess the fate of newborns born by emergency Cesarean section during the early neonatal period at the University Hospital Centre (UHC) in Brazzaville, with a view to improving neonatal prognosis. Patients and methods: This was a descriptive and cross-sectional analytical study of exposed and unexposed type, which took place from 24 March 2018 to 24 May 2018. All cases of newborns born by Cesarean section were included. Children born by extreme emergency and urgent Cesarean section were considered as exposed, and the others not exposed. The variables studied were the epidemiological characteristics of the mothers, the history of pregnancy and its management, anthropometric data on the newborn, the state of the child at birth and monitoring up to the seventh day. The test for comparing the proportions of target groups related to the child’s condition was used. Results: The mothers were aged 20 to 29 years (extreme 16 to 44 years);32 of them (22.5%) had a scarred uterus;29 pregnant women (20.4%) had a pathology associated with pregnancy. The distance travelled to consult was between 5 and 10 Km (63 cases or 44.3%). Emergency Caesarean sections were performed in 110 patients (77.5%) and scheduled Caesarean sections in 32 pregnant women (22.5%). Localoregional anaesthesia by spinal anaesthesia predominated (78.9%), by the association Bipivancaine + Fentanyl (69 cases or 48.6%) whose practitioner was often the nurse anaesthetist (131 cases or 92.3%). No accidents have occurred intraoperatively. At birth we noticed: 4.2% stillbirth, 19.7% bad, requiring resuscitation of at least 5 minutes for 16 newborns (57.1%). 26 newborns (18.3%) required care in the Neonatology Department. Early neonatal morbidity was dominated by respiratory distress (10 cases or 38.5%), early neonatal infection (5 cases or 19.1%) and a lethality rate of 19.2%. Conclusion: The future of the newborn, born by emergency Cesarean section is mixed;emergency control can improve the situation

关键词： Newborns Emergency Caesarean Sections Congo

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润滑油抗氧剂协同作用研究

润滑油 2009年第4期24卷 38-44页

作者：姚俊兵 gaston Aguilar Steven G. Donnelly R. T. Vanderbilt Company Inc.

对润滑油的氧化机理做了简要阐述,并根据不同的抗氧作用机理,将抗氧剂分为三类:自由基清除剂(如酚类和胺类抗氧剂)、氢过氧化物分解剂(如氨基甲酸酯)和抗氧协合剂(如不含硫磷的钼酸酯)。利用加压差示扫描量热法(PDSC)对不同类型抗氧剂... 详细信息

对润滑油的氧化机理做了简要阐述,并根据不同的抗氧作用机理,将抗氧剂分为三类:自由基清除剂(如酚类和胺类抗氧剂)、氢过氧化物分解剂(如氨基甲酸酯)和抗氧协合剂(如不含硫磷的钼酸酯)。利用加压差示扫描量热法(PDSC)对不同类型抗氧剂以及它们之间的协同作用进行了考察。研究表明,作为氢过氧化物分解剂,改进的无灰氨基甲酸酯具有比胺类、酚类抗氧剂更好的性能,这显示了氢过氧化物分解型抗氧剂巨大的应用潜力。研究还表明,具有相同抗氧机理的不同抗氧剂,如酚类和胺类抗氧剂,具有协同作用;不同作用机理的两抗氧剂之间,如自由基清除剂和氢过氧化物分解剂,具有更好的抗氧化协同效果,其中,无灰氨基甲酸酯与烷基化二苯胺抗氧剂具有最佳的抗氧协同效能,可成为高温无灰抗氧剂应用的一个很好选择;不同抗氧机理的三种抗氧剂复合,如烷基化二苯胺,氨基甲酸锌和有机钼酸酯组成的三元复合抗氧剂,具有更为优秀的抗氧化性能。通过不同机理抗氧剂之间的协同,不仅可以获得优秀的抗氧化性能,还可获得附加的极压、抗磨和减摩性能,而且有的减摩、抗磨性能还非常突出,如烷基化二苯胺、氨基甲酸锌和有机钼酸酯组成的三元复合添加剂体系。

关键词：润滑油抗氧剂自由基清除剂氢过氧化物分解剂抗氧协合剂协同作用

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Acute Renal Failure in Children at the University Hospital of Brazzaville

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Open Journal of Pediatrics 2019年第3期9卷 253-271页

作者： Engoba Moyen Verlem Bomelefa-Bomel gaston Ekouya-Bowassa Tony Eyeni Sinomono Aymar Pierre Gildas Oko Bertrand Fikahem Ellenga Mbolla Georges Marius Moyen Intensive Care Pediatric Department University Hospital of Brazzaville Brazzaville Congo Neonatology Department University Hospital of Brazzaville Brazzaville Congo Nephrology Department University Hospital of Brazzaville Brazzaville Congo Cardiology Department University Hospital of Brazzaville Brazzaville Congo

Introduction: Acute renal failure (ARF) is a medical emergency that does not spare children. Its interest lies in the search for etiologies and management made difficult by the poor quality of hospital technical platform in Africa. Objectives: To improve the management of ARF in children, determine its prevalence, and identify the causes and factors associated with mortality. Patients and Methods: We reviewed the records of children from one month to 17 years hospitalized between January 2016 and December 2018 in every pediatric department at the University Hospital of Brazzaville and included those whose discharge diagnosis included the item “ARF”. Study variables were age, sex, source, (para)clinical signs, stage and type of ARF, etiology and evolutionary profile. Results: Included were 18952 hospitalized children out of whose 253 had ARF 1.3%. There were 145 (57.3%) boys and 108 (42.7%) girls with an average age of 71.5 months. The mean time to consultation was 8.1 days. ARF was at failure stage in 147 cases (58.1%). It was functional in 210 cases (83.0%), out of which 95.1% resulted from severe dehydration. No extra-renal treatment was performed. Lethality was 34.4%. Hypovolemic shock (56.3%), severe sepsis (18.4%) and severe malaria (14.9%) were the main causes. Young age, provenance of the child, severe dehydration, deep coma, oligoanuria, stage of failure, hyperkalemia, absence of an extra-renal purification center were factors associated with mortality (p Conclusion: The high prevalence of ARF and its lethality requires public health actions including proper management of dehydration and malaria but also the creation of an extra-renal purification center.

关键词： Acute Renal Failure Child Brazzaville