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保安煤矿15108工作面沿空留巷技术研究及应用

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山东煤炭科技 2024年第9期42卷 27-32页

作者：任侣苏山西煤炭运销集团保安煤业有限公司山西阳泉045000

针对保安煤矿15#煤层厚度大,留设大尺寸区段保护煤柱浪费大量煤炭资源的问题,提出了采用沿空留巷技术提高煤炭资源回收率,采用理论分析及工程类比的方法,提出了非对称的补强支护方案,在距离回采帮侧700 mm和1700 mm位置布置两列Φ21.8 m... 详细信息

针对保安煤矿15#煤层厚度大,留设大尺寸区段保护煤柱浪费大量煤炭资源的问题,提出了采用沿空留巷技术提高煤炭资源回收率,采用理论分析及工程类比的方法,提出了非对称的补强支护方案,在距离回采帮侧700 mm和1700 mm位置布置两列Φ21.8 mm×8300 mm的锚索,在距离非回采帮800 mm位置布置一列Φ21.8 mm×8300 mm的锚索,排距均为800 mm;采用理论计算及数值模拟的方法,确定了合理的巷旁充填体宽度为1.6 m。通过在15108回风巷进行现场试验监测数据显示,在补强支护方案条件下,当巷旁充填体宽度为1.6 m时,巷道围岩变形量不大,沿空巷道断面收敛率仅为13.7%,可以满足下一工作面的使用要求。

关键词：厚煤层沿空留巷巷道变形充填体宽度

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6loWPAN传感器节点的设计与实现

传感技术学报 2010年第10期23卷 1501-1504页

作者：王晓喃高德民常熟理工学院计算机科学与工程学院江苏常熟215500 南京理工大学计算机科学与技术学院南京210094

提出了一种基于6loWPAN的传感器节点设计方案,此方案对节点中的硬件与软件设计进行了详细论述与讨论。在小型实验平台上对本节点的数据包接收率、平均延迟时间以及平均消耗能量等性能参数进行了比较分析。实验数据表明,本节点能很好地... 详细信息

提出了一种基于6loWPAN的传感器节点设计方案,此方案对节点中的硬件与软件设计进行了详细论述与讨论。在小型实验平台上对本节点的数据包接收率、平均延迟时间以及平均消耗能量等性能参数进行了比较分析。实验数据表明,本节点能很好地实现与IPv6节点的互联并保证其连续性。

关键词：传感器网络传感器节点适配层协议

Evaluation of the Use of long-lasting Impregnated Mosquito Nets (llINs) in the Health district of dimbokro (Center of Côte d’Ivoire)

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Journal of Biosciences and Medicines 2024年第3期12卷 44-61页

作者： Ellélé Aimé Marius Yapi Tanoh Amany serge Raymond N’krumah Bi Yourou Guillaume Zamina Martial Bama Assikohon Pulchérie Gouzilé Amoin Nadège Abo Issaka Tiembre General Hygiene department Institut National d’HygiènePublique (INHP) Abidjan C&ocircte d’Ivoire Animal Biology department Peléféro Gon Coulibaly University Korhogo C&ocircte d’Ivoire Environment and Health department Swiss Center for Scientific Research Abidjan C&ocircte d’Ivoire Public Health Emergency Operations Center National Institute of Public Hygiene (INHP) Abidjan C&ocircte d’Ivoire Malaria department National Institute of Public Hygiene (INHP) Abidjan C&ocircte d’Ivoire Epidemiological surveillance service Health District Dimbokro C&ocircte d’Ivoire Vaccinology sub-directorate National Institute of Public Hygiene (INHP) Abidjan C&ocircte d’Ivoire department of Public Health Félix Houphou&eumlt Boigny University Abidjan C&ocircte d’Ivoire

The dimbokro health district has one of the highest incidences of malaria in Côte d’Ivoire, despite numerous campaigns to distribute long-Acting Impregnated Mosquito Nets (llINs). Given this observation, what are the population’s attitudes towards llINs that could explain the high endemicity of malaria in dimbokro? The aim of this study is to assess the knowledge, attitudes and practices of people in the health area of Nofou, one of the villages in the dimbokro health district where malaria is most prevalent, with a view to strengthening malaria control strategies. A collection of historical health data (malaria cases and llIN usage rates) and a cross-sectional questionnaire survey was carried out from July 20 to August 03, 2022 in 400 households selected by systematic random sampling. data were entered using Epi Info 7 and multivariate statistical analyses were performed using IBM sPss 22 software. In the dimbokro health district, the rate of llIN use was negatively correlated (r = -0.771) with malaria incidence over the six years of historical data collection. Households had an average of 53% good knowledge, 68.6% good practices and 28.4% good attitudes towards llINs. The study also revealed that the main factors explaining llIN use in the Nofou health area are mosquito bite (ORa = 5.29 (1.12 - 25.04)), age of household members (ORa = 1.07 (1.01 - 1.14)) and marital status (ORa = 8.45 (1.70 - 45.02)). Awareness-raising on the use of llINs should be intensified in the dimbokro health district. Other control strategies, such as vector control and environmental sanitation, should be considered to combat malaria.

关键词： Malaria llINs Knowledge Attitudes Practices dimbokro Côte d’Ivoire

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无限维项链李代数的若干有限维李子代数

数学进展 2015年第6期44卷 816-826页

作者：余德民卢才辉湖南理工学院数学学院岳阳湖南414000 首都师范大学数学科学学院北京100037

无限维项链李代数是新的一类无限维李代数.本文第一次定义项链词的左右指标数组,并利用左右指标数组把项链词分成5类.本文重点讨论项链李代数的有限维李子代数,并证明了其中一些子代数同构于典型单李代数sl(n).

关键词：项链李代数左右指标数组子代数

Role of serendipity in the discovery of classical antidepressant drugs:Applying operational criteria and patterns of discovery

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World Journal of Psychiatry 2022年第4期12卷 588-602页

作者： Francisco lópez-Muñoz Pilar d’Ocón Alejandro Romero JoséA Guerra CecilioÁlamo Faculty of Health University Camilo JoséCelaVillanueva de la Cañada 28692MadridSpain “Hospital 12 de Octubre”Research Institute(i+12) Avda.de Córdobas/nMadrid 28041Spain department of Pharmacology Faculty of PharmacyUniversity of ValenciaAvda.Vicent Andres Estelless/nValencia 46100Spain department of Pharmacology and Toxicology Faculty of Veterinary MedicineComplutense UniversityAvda.Puerta de Hierros/nMadrid 28040Spain department of Pharmacology and Toxicology Faculty of PharmacyComplutense UniversityPl.de Ramón y Cajals/nMadrid 28040Spain department of Biomedical sciences(Pharmacology Area) Faculty of Medicine and Health SciencesUniversity of AlcaláCampus Científico-TecnológicoCrta.de Madrid-BarcelonaAlcaláde Henares 28871MadridSpain

The role played by serendipity in the origin of modern psychopharmacology has proven to be controversial in scientific *** its original meaning(Walpole),serendipity refers to discoveries made through a combination of accidents and *** have implemented an operational definition of serendipity based on finding something unexpected or unintended,regardless of the systematic process that led to the accidental observation,and we have established four different patterns of serendipitous *** this paper,we have analyzed the role of serendipity in the discovery and development of classical antidepressant drugs,tricyclic antidepressants and monoamine oxidase inhibitors as well as heterocyclic,“atypical”or“second generation”*** discovery of the antidepressant properties of imipramine and iproniazid,the prototypes of tricyclic antidepressants and monoamine oxidase inhibitors,respectively,fits the mixed type II pattern;initial serendipitous discoveries(imipramine was an antipsychotic and iproniazid was an antituberculosis agent)led secondarily to non-serendipitous *** the other components of these two families of drugs were developed specifically as antidepressants,modifying the chemical structure of the series leaders,thereby allowing all of them to be included in the type IV pattern,characterized by the complete absence of *** the heterocyclic drugs,mianserin(originally developed as an antihistamine)also falls into the type II pattern.

关键词： serendipity Antidepressants Imipramine Iproniazid Psychopharmacology History of neurosciences

Organic carbon content and carbon isotope variations across the Permo-Triassic boundary in the Gartnerkofel-1borehole, Carnic Alps, Austria

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Acta Geochimica 2018年第3期37卷 422-432页

作者： M.E.Brookfield W.s.Wolbach A.G.stebbins I.Gilmour d.R.Roegge school for the Environment University of Massachusetts at Boston department of Chemistry De Paul University department of Physical sciences Planetary and Space Sciences The Open University department of Chemistry Illinois Wesleyan University

The Gartnerkofel borehole is one of the most thoroughly studied and described Permo-Triassic sections in the world. detailed bulk organic carbon isotope studies show a negative base shift from-24% to-28% in the latest Permian which latter value persists into the Earliest Triassic after which it decreases slightly to-26%. Two strongly negative peaks of [-38% in the latest Permian and a lesser peak of-31% in the Early Triassic are too negative to be due to a greater proportion of more negative organic matter and must be due to very negative methane effects. The overall change to more negative values across the Bulla/Tesero boundary fits the relative rise in sea level for this transition based on the facies changes. A positive shift in organic carbon isotope values at the late Permian Event Horizon may be due to an increase in land-derived organic detritus at this level—a feature shown by allTethyan Permo-Triassic boundary sections though these other sections do not have the same values. Carbonate carbon isotope trends are similar in all sections dropping by2–3 units across the Permo-Triassic boundary. Gartnerkofel carbonate oxygen values are surprisingly, considering the ubiquitous dolomitization, compatible with values elsewhere and indicate reasonable tropical temperatures of 60 °C in the latest Permian sabkhas to 20–40 °C in the overlying marine transition beds. Increased landderived input at the late Permian Event Horizon may be due to offshore transport by tsunamis whose deposits have been recognized in India at this level.

关键词： Organic Carbon Isotopes Permo-Triassic Gartnerkofel Austria

2d Ti_(3)C_(2)T_(x)MXene-derived self-assembled 3d TiO_(2)nanoflowers for nonvolatile memory and synaptic learning applications

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Journal of Materials science & Technology 2023年第19期150卷 1-10页

作者： Atul C.Khot Tukaram d.dongale Kiran A.Nirmal Jayan K.deepthi santosh s.sutar Tae Geun Kim school of Electrical Engineering Korea UniversityAnam-ro 145Seongbuk-guSeoul 02841Republic of Korea Computational Electronics and Nanoscience Research laboratory School of Nanoscience and BiotechnologyShivaji UniversityKolhapur 416004India Rajagiri school of Engineering and Technology(Autonomous) Rajagiri ValleyKakkanadKochiKerala 682039India Yashwantrao Chavan school of Rural development Shivaji UniversityKolhapur 416004India

Two-dimensional(2d)semiconducting materials and transition-metal oxides are promising materials for nonvolatile memory and brain-inspired neuromorphic computing ***,it remains chal-lenging to obtain high-quality stacked 2d films with low energy consumptions(or drive currents)be-cause of their high interfacial *** this study,we synthesized 2d Ti_(3)C_(2)T_(x)MXene-derived three-dimensional(3d)TiO_(2)nanoflowers(NFs)as a feasible resistive switching(Rs)material with outstanding electronic properties and synaptic learning *** electrical and optical characteristics of the synthesized material were determined through density functional theory *** measure-ments of the Al/Ti_(3)C_(2)T_(x)-TiO_(2)NF/Pt memory device indicated the occurrence of forming-free switching phenomena with extremely low switching voltages(0.68-0.53 V),stable ON/OFF ratio(2.3×103),and retention greater than 105 *** Holt-Winters exponential smoothing technique was used for mod-eling and predicting the switching voltages of the Rs *** mechanism underlying the reliable Rs was confirmed by observing the dense conductive filaments through conductive atomic force ***,the 2d Ti_(3)C_(2)T_(x)MXene-derived 3d TiO_(2)NF-based Rs device mimicked the po-tentiation/depression and spike-time-dependent plasticity of a biological ***,a convolutional neural network was implemented based on the observed synaptic weights of Al/Ti_(3)C_(2)T_(x)-TiO_(2)NF/Pt for image-edge detection.

关键词： MXene Ti_(3)C_(2)T_(x)-TiO_(2)nanoflowers Resistive switching synaptic learning density functional theory Time-series analysis

Application of a new reagent for analysis of oxygen presence in a lowcarbon steel wire rod

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Journal of Iron and steel Research International 2021年第6期28卷 729-738页

作者： M.I.dávila-Pérez H.J.Vergara-Hernández O.Vázquez-Gómez F.Reyes-Calderón E.lópez-Martínez J.M.salgado-lópez National Technology of Mexico/T.I.of Morelia Morelia 58120MichoacanMexico National Council for science and Technology CONACYT Mexico City 03940Mexico Isthmus University Santo Domingo TehuantepecOaxaca 70760Mexico Engineering and Industrial development Center CIdEsI Santiago de Queretaro 76125QueretaroMexico

A microstructural analysis was performed to determine the presence of oxygen in a wire rod section of AIsI 1008 steel with a surface mechanical failure produced during wire *** failure zone was analyzed by comparison using three different attack reagents:alkaline sodium chromate(AsC),AsC with hydrogen peroxide and amyl alcohol,and a solution of nitric acid in ethyl *** reagents were applied in samples in the failure zone,showing different types of zones in regions with internal and superficial defects such as carbides,pores,cracks,deformation,and detachment zones,indicating the possible presence of *** areas identified were observed by means of an optical microscope and were correlated with the content of elements that were present in the region using a scanning electron microscope and a scattered X-ray energy spectrometer,which determined that the areas identified by chromate sodium correspond to regions with a high concentration of oxygen and slag-forming elements such as silicon,aluminum,and iron;this is associated with the presence of oxygen in the oxide *** was also observed that the AsC and the modified AsC solution with hydrogen peroxide and amyl alcohol could identify areas with a high presence of oxides,while the nitric acid solution only identified the steel *** modified AsC solution is an alternative to identify the presence of chemical variants of oxygen because the conventional formulation is unstable and has a too short shelf life,and therefore,its application must be carried out at the time of preparation.

关键词： Etching Alkaline sodium chromate Oxide presence Internal defect

RElATIONsHIP BETWEEN 500 hPa RIdGE AXIs POsITIONs OVER THE INdIAN ANd THE WEsT PACIFIC REGIONs ANd THE INdIAN sUMMER MONsOON RAINFAll

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Advances in Atmospheric sciences 1986年第3期3卷 349-359页

作者： s.V.singh,s.R.Inamdar,R.H.Kripalani,K.d.Prasad Indian Institute of Tropical Meteorology Pune-411 005 India Indian Institute of Tropical Meteorology Pune-411 005 India Indian Institute of Tropical Meteorology Pune-411 005 India Indian Institute of Tropical Meteorology Pune-411 005 India

500 hPa ridge positions over the Indian and the West Pacific regions during April are related with the summer monsoon rainfall over India. The ridge position over the Indian region shows better relation with monsoon rainfall than that shown by the ridge over the Pacific region. The multiple correlation of these ridge positions with monsoon rainfall exceeds 0.7. These predictive relationships are better than those shown by other parameters, viz. (1) Northern Hemispheric surface temperature; (2) East-Pacific sea surface temperature; (3) El-Nino events and (4) Tahiti-darwin pressure difference, and index of southern oscillation, over the 30-year samples analysed.

关键词： over Nino RElATIONsHIP BETWEEN 500 hPa RIdGE AXIs POsITIONs OVER THE INdIAN ANd THE WEsT PACIFIC REGIONs ANd THE INdIAN sUMMER MONsOON RAINFAll