检索结果-南通市图书馆

Improved Catalytic Reaction of Biotemplated Palladium Nanoparticles through Immobilized Metal Affinity Purification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Music Genre Classification Using African Buffalo Optimization

Advances in Nanoparticles（纳米粒子） 2023年第1期

作者： shadrach ibinola Hazim Aljewari Imann Mosleh Robert Beitle

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第2期44卷 1823-1836页

作者： B.Jaishankar Raghunathan Anitha Finney Daniel shadrach M.Sivarathinabala V.Balamurugan KPR Institute of Engineering and Technology Coimbatore641407India Government Engineering College Palakkad678633India Velammal Institute of Technology Chennai601204India Sathyabama Institute of Science and Technology Chennai600119India

In the discipline of Music Information Retrieval(MIR),categorizing musicﬁles according to their genre is a difﬁcult *** genre classiﬁca-tion is an important multimedia research domain for classiﬁcation of music *** the proposed method music genre classiﬁcation using features obtained from audio data is *** classiﬁcation is done using features extracted from the audio data of popular online repository namely GTZAN,ISMIR 2004 and Latin Music Dataset(LMD).The features highlight the differences between different musical *** the proposed method,feature selection is per-formed using an African Buffalo Optimization(ABO),and the resulting features are employed to classify the audio using Back Propagation Neural Networks(BPNN),Support Vector Machine(SVM),Naïve Bayes,decision tree and kNN classiﬁ*** evaluation reveals that,ABO based feature selection strategy achieves an average accuracy of 82%with mean square error(MSE)of 0.003 when used with neural network classiﬁer.

关键词： Genre african buffalo optimization neural network SVM audio data music

P-wave velocity structure in the crust and the uppermost mantle of Chao Lake region of the Tan-Lu Fault inferred from teleseismic arrival time tomography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Science 2022年第6期35卷 427-447页

作者： Bem shadrach Terhemba Huajian Yao Song Luo Lei Gao Haijiang Zhang Junlun Li Laboratory of Seismology and Physics of Earth's Interior School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei230026China Department of Physics Federal University DusteDutseJigawa StateNigeria Mengcheng National Geophysical Observatory University of Science and Technology of ChinaMengcheng 233500China CAS Center for Excellence in Comparative Planetology University of Science and Technology of ChinaHefei 230026China

Chao Lake is a Geoheritage site on the active Tan-Lu Fault between the Yangtze craton,the North China craton,and the Dabie orogenic belt in the *** segment of the fault is not well constrained at depth partly due to the overprinting of the fault zone by intrusive materials and its relatively low seismic activity and sparse seismic station *** study took advantage of a dense seismic array deployed around Chao Lake to delineate the P-wave velocity variations in the crust and uppermost mantle using teleseismic earthquake arrival time *** station-pair double-difference with waveform crosscorrelation technique was *** used a multiscale resolution 3-D initial model derived from the combination of highresolution 3-D v S models within the region of interest to account for the lateral heterogeneity in the upper *** results revealed that the velocity of the upper crust is segmented with structures trending in the direction of the strike of the *** basins are delineated on both sides of the fault with slow velocities,while the fault zone is characterized by high velocity in the crust and uppermost *** high-velocity structure in the fault zone shows characteristics of magma intrusion that may be connected to the Mesozoic magmatism in and around the Middle and Lower Yangtze River Metallogenic Belt(MLYMB),implying that the Tan-Lu fault might have formed a channel for magma *** material in Chao Lake is likely connected to the partial melting,assimilation,storage,and homogenization of the uppermost mantle and the lower crustal *** intrusions,however,seem to have suffered severe regional extension along the Tan-Lu fault driven by the eastward Paleo-Pacific plate subduction,thereby losing its deep trail due to extensional erosion.

关键词： teleseismic arrival time tomography v P velocity structure crust and uppermost mantle Tan-Lu Fault Chao Lake

Climate Influenced Challenges of Accessibility to Water by Households Downstream of the Upper Benue River Basin-Nigeria

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Climate Sciences 2021年第1期11卷 53-72页

作者： Vincent Nduka Ojeh shadrach Terlumun Semaka Department of Geography Faculty of Social Sciences Taraba State University Jalingo Nigeria

The study examined climate influenced challenges of accessibility to water by households downstream of the Upper Benue River Basin, Nigeria. Literatures related to the topic being investigated were reviewed. The study adopted a descriptive survey design. The population of the study consisted of communities in Adamawa, Gombe, Bauchi and Taraba states. Eight different communities, two in each local government were sampled for the study. Simple random and purposive samplings were used for the study. A total of 351 respondents were selected for the study using Krejcie and Morgan sample size determination. Data analysis was done using frequency tables percentages and mean statistics. The findings of the study showed that climate variability has great impact on water stress and threats to households’ downstream in Upper Benue River basin represented with a mean 3.85 (decrease in the quality and quantity of surface water) as well as 3.43 (drying up of rivers and lakes). The study also revealed that water stress induced by climate variability has a significant effect on household livelihoods represented by 87% of the respondents in the study area. It was also revealed that that households downstream the basin are vulnerable to climate change and households in the study area have development strategies to contend with water stress so as to better their livelihood among which is surface water harvesting (2.78), reducing the number of times dishes are washed (2.96), reducing the quantity of water used for bathing (3.0) among others. The study recommended that stakeholders and the government should make proactive efforts to ensuring that alternative water sources are established in the study area to reduce water stress among the rural populace.

关键词： Upper Benue River Basin Accessibility Households Water Challenges

A Survey of Noise Pollution in Ado-Ekiti Metropolis Using Mobile Phone

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural Science 2015年第10期7卷 475-482页

作者： shadrach Tunde Akinkuade Kolawole Peter Fasae Science Technology Department The Federal Polytechnic Ado-Ekiti Nigeria

Noise is considered as the most pervasive pollutant, it constitutes the most disturbing among the city pollutants and is a serious urban crisis in Ado Ekiti metropolis. Noise pollution was monitored at five different locations in Ado-Ekiti, the capital town of Ekiti State of Nigeria. The study was done using a Virtual Instrument;a Sound Pressure Level mobile application installed on a mobile phone. The equivalent noise level using A-weighting was taken every fifteen minutes in each location between 6:00 am and 9:00 pm and the LAeq,T of each location was calculated. Maximum LAeq,6h of 105.40 dB was obtained in marketplace between 6:00 am and 12:00 pm while the minimum value of LAeq,6h obtained for a residential area in the same period is 69.51 dBA. The residents are exposed to average noise levels of 75 - 98 dB (A) or more every day which is higher than the recommended value of 60 dBA by WHO. This is very dangerous to the health of the people in these areas, and the results obtained in this study are useful as reference and guideline for future regulations on noise limit to be implemented for urban areas in Nigeria.

关键词： Noise Pollution Sound Pressure A-Weighting Equivalent Noise Level

郯庐断裂带中南段高分辨岩石圈变形结构及其对郯庐断裂起源模式的启示

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

郯庐断裂带中南段高分辨岩石圈变形结构及其对郯庐断裂起源模式的...

Ethanolic extract of Abrus precatorius leaves protected against mercury chloride-induced hepatocellular damage and cerebral Na+/K+-ATPase dysfunction in wistar rats

2022年中国地球科学联合学术年会

作者：罗松姚华建张智奇 shadrach Terhemba Bem

郯庐断裂带是中国东部一条著名的岩石圈尺度的巨型走滑断裂。自中生代形成以来,郯庐断裂带在中国大陆板块构造演化过程中扮演了极其重要的角色。但是,有关郯庐断裂带的起源机制以及其构造演化过程一直存在争议,部分原因要归咎于缺乏来... 详细信息

郯庐断裂带是中国东部一条著名的岩石圈尺度的巨型走滑断裂。自中生代形成以来,郯庐断裂带在中国大陆板块构造演化过程中扮演了极其重要的角色。但是,有关郯庐断裂带的起源机制以及其构造演化过程一直存在争议,部分原因要归咎于缺乏来自深部高分辨结构的约束。本次研究中,我们从郯庐断裂带中南段区域范围内的253个固定地震台和111个流动地震台中提取到了周期从5至150s的面波频散数据。

关键词：郯庐断裂带岩石圈变形

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Toxicology Advances 2023年第2期5卷 8-13页

作者： Ebenezer Morayo Ale Steve Osagie Asuelimen Isaac John Umaru Bunmi Olaoluwa Olorundare Victoria Ifeoluwa Ayo Mgbede Joy Timothy Philip shadrach Department of Biochemistry Faculty of Pure and Applied SciencesFederal University WukariTaraba State 670101Nigeria Department of Cocoa Research Institute of Nigeria IbadanOyo State 200261Nigeria

Plants are sources of medicinal compounds,and they play a crucial role in human health *** precatorius is one of the important medicinal plants that have been alleged for their medicinal *** research unraveled the pharmacological effect of ethanolic extract of Abrus precatorius on lipid peroxidation,liver parameters,and Na^(+)/K^(+)-ATPase activity in HgCl_(2) treated wistar ***-four(24)albino wistar rats weighing between 150-200 g were distributed into four groups of 6 animals *** A(control)received normal saline(0.9% NaCl),group B received 400 mg/kg of the extract only,group C received 4 mg/kg HgCl_(2) only,and group D received 400 mg/kg of extract+4 mg/kg of HgCl_(2).The treatment lasted for two weeks,and the animals were sacrificed on the 15th *** blood,brains and livers were collected and used for assay of lipid peroxidation,liver function,and sodium pump *** results of liver function test revealed an elevated(P<0.05)level of serum aspartate transaminase,alanine transaminase,alkaline phosphatase,and total bilirubin in the group that received HgCl_(2) only(group C)when compared with the normal control(group A)that received normal saline ***,the administration of extract in group D led to a marked(P<0.05)reduction in the activities of these enzymes and the level of total bilirubin when compared to the negative control(group C).On the contrary,HgCl_(2) caused a significant(P<0.05)reduction in serum total protein and albumin levels,but the extract reversed the effect of HgCl_(2) by elevating their ***,the effect elicited by this extract is comparable to group A which received normal ***,the result of lipid peroxidation revealed that HgCl_(2) treatment caused a marked(P<0.05)increase in the formation of lipid peroxidation adducts in both liver and brain homogenates in group *** the contrary,administration of Abrus precatorius extract profoundly(P<0.05)inhibited HgCl_(2)-

关键词： ethanolic extract Abrus precatorius hepatic parameters lipid peroxidation Na^(+)/K^(+)-ATPase activity mercury chloride in vivo