检索结果-南通市图书馆

中华放射学杂志 2010年第7期44卷 778-780页

作者：张体江赵开飞吴杞柱黄晓琦吕粟李秀丽 nabin amatya 关晶骆科进先正元龚启勇四川大学华西医院放射科成都610041 遵义医学院附属医院放射科

脉络丛肿瘤（choroid pluxus tumor，CPT）是一种少见的颅内原发肿瘤，多位于侧脑室和第三脑室。少数肿瘤可发生于脑室以外，如桥小脑角区；发生于脑实质的CPT罕见。笔者报道3例发生于幕下的CPT，并结合文献复习其影像表现，以提高对本... 详细信息

脉络丛肿瘤（choroid pluxus tumor，CPT）是一种少见的颅内原发肿瘤，多位于侧脑室和第三脑室。少数肿瘤可发生于脑室以外，如桥小脑角区；发生于脑实质的CPT罕见。笔者报道3例发生于幕下的CPT，并结合文献复习其影像表现，以提高对本病的认识。

关键词：脉络丛肿瘤 MRI表现幕下第三脑室桥小脑角区原发肿瘤影像表现文献复习

Fooling intrusion detection systems using adversarially autoencoder

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2021年第3期7卷 453-460页

作者： Junjun Chen Di Wu Ying Zhao nabin Sharma Michael Blumenstein Shui Yu College of Information Science and Technology Beijing University of Chemical TechnologyBeijing100029China School of Computer Science University of Technology SydneyUltimo2007Australia Centre for Artificial Intelligence University of Technology SydneyUltimo2007Australia

Due to the increasing cyber-attacks,various Intrusion Detection Systems(IDSs)have been proposed to identify network *** existing machine learning-based IDSs learn patterns from the features extracted from network traffic flows,and the deep learning-based approaches can learn data distribution features from the raw data to differentiate normal and anomalous network *** having been used in the real world widely,the above methods are vulnerable to some types of *** this paper,we propose a novel attack framework,Anti-Intrusion Detection AutoEncoder(AIDAE),to generate features to disable the *** the proposed framework,an encoder transforms features into a latent space,and multiple decoders reconstruct the continuous and discrete features,***,a generative adversarial network is used to learn the flexible prior distribution of the latent *** correlation between continuous and discrete features can be kept by using the proposed training *** conducted on NSL-KDD,UNSW-NB15,and CICIDS2017 datasets show that the generated features indeed degrade the detection performance of existing IDSs dramatically.

关键词： Intrusion detection Cyber attacks Autoencoder Generative adversarial networks

Differences in Tree Species Diversity and Soil Nutrient Status in a Tropical Sacred Forest Ecosystem on Niyamgiri Hill Range,Eastern Ghats,India

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2012年第4期9卷 492-500页

作者： Sudam Charan SAHU nabin Kumar DHAL Brij LAL Rama Chandra MOHANTY Environment and Sustainability Department CSIR-IMMTBhubaneswar-751013India Biodiversity Division CSIR-IHBTPalampurIndia Department of Botany Utkal UniversityBhubaneswar-751004India

We have quantitatively analyzed the tree species diversity with respect to soil nutrient status in three sites of a sacred forest ecosystem of Niyamgiri hill range, Eastern Ghats, India. Extensive field surveys and sampling were conducted in 3 sites of the hill range： Site 1 Pterocarpus dominated forest （PTF）（19°40＇02.2＇＇ N and 83°21＇23.1＇＇ E）, Site 2 Mangifera dominated forest （MAF）（19°40＇02.8＇＇ N and 83°21＇40.8＇＇ E） and Site 3 Mixed forest （MIF）（19°36＇47.1＂ N and 83°21＇02.7＇＇ E）. A total of 28 families, 42 genera, 46 tree species, and 286 individual trees were recorded on an area of0.6 ha. Tree density varied between 470 and 49o individuals ha and average basal area between 3.16 and l0.04 m2 ha-1. Shannon Index （H＇） ranged from 2.34 to 4.53, Simpson＇s Index ranged from 0.07 to o.09, and equitability Index ranged from 0.7 to 1.34. The number of individuals was highest in the girth at breast height （GBH） class of 50-7o cm. The soil nutrient status of the three forest types was related to tree species diversity. The soil pH value of the three sites reflected the slightly acidic nature of the area. Species diversity was positively correlated with organic carbon and phosphorus and negatively with nitrogen, EC and pH. The results of the current study may be helpful to further develop a conservation planfor tree species in tropical sacred forest ecosystems.

关键词： Tree species diversity Sacred forestecosystem Soil nutrient status Eastern Ghats

Rural coping and adaptation strategies for climate change by Himalayan communities in Nepal

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2020年第6期17卷 1462-1474页

作者： nabin DHUNGANA Nisha SILWAL Suraj UPADHAYA Chiranjeewee KHADKA Sunil Kumar REGMI Dipesh JOSHI Samjhana ADHIKARI CARE Nepal Central Office 4/288 SAMATA BhawanDhobighatP.0 Box 1661LalitpurNepal Institute of Forestry Pokhara CampusPokharaP.O.Box 33700Nepal Himalayan Conservation and Research Institute DunaiDolpaP.O.Box 21400Nepal Department of Natural Resource Ecology and Management Iowa State UniversityAmesIA 50010USA Global Change Research Institute Academy of Sciences of the Czech RepublicLipova 937005 Ceske BudejoviceCzech Republic Winrock International Nepal.House#Kha 194 P.O.Box 8975SanepaLalitpurNepal WWF Nepal P.0.Box 7660 BaluwatarKathmanduNepal Department of Forests District Forest OfficeChitwanP.O.Box 44200Nepal

Climate change has major impacts on the livelihoods of forest-dependent *** unpredictable weather conditions in rural Nepal have been attributed to a changing *** study explored the climate change adaptation and coping strategies that rural communities adopt for the conservation of natural resources and livelihoods in the mid-hills of *** paper explored major climatic hazards,assessed different coping and adaptation measures,and barrier faced to climate change adaptation based on perceptions by forest-dependent *** conducted focus group discussions,questionnaire surveys,and semistructured interviews with local communities and *** results showed that rural communities had experienced significant impacts of climate change and *** response,they are practicing diverse coping and adaptation strategies,including the construction of bioengineering structures and planting different species that grow quickly and establish promptly.

关键词： Climate Change Community Forest Users Group Index of Usefulness of Practices for Adaptation(IUPA) Adaptation Measures

Community perspectives on the effectiveness of watershed management institutions in the Himalayas

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第4期21卷 1119-1139页

作者： Nisha SILWAL nabin DHUNGANA Rajan SUBEDI Suraj UPADHAYA Chun-Hung LEE Natural Resources Conservation Nepal(NRCN) ChitwanP.O.Box 44200Nepal Department of Natural Resources and Environmental Studies College of Environmental StudiesNational Dong Hwa UniversityHualien 97401Chinese Taipei Institute of Forestry Tribhuvan UniversityPokharaP.O.Box 43Nepal School of Agriculture and Natural Resources Kentucky State UniversityFrankfortKY 40601USA Himalayan Conservation and Research Institute DolpaP.O.Box 21400Nepal

The sustainability of environmental management initiatives,such as watershed management programs,relies on the presence of effective institutions at the watershed ***,there needs to be more empirical evidence from evaluating the effectiveness of watershed-level ***,this study presents a pioneering effort to evaluate the effectiveness of Nepal’s first watershed conservation committee at the watershed scale,focusing on the case of the Khageri Khola watershed in Central *** study involved conducting a household survey,key informant interviews,focus group discussions,and field observations to collect and analyze the *** analysis,index value calculation,and chi-square statistics were then employed to summarize the results regarding local respondents’perceptions of twelve institutional characteristics,their rationalities,and their association with socio-demographic *** results reveal that the watershed conservation committee was perceived as performing well in managing the ***,good interaction,appropriate scale,technical,environmental,social,organizational,and government rationality were perceived as highly effective,with an average index value of less than *** contrast,clarity of objectives and economic rationality showed moderate effectiveness,with an average index value ranging from 0.36 to ***,the results suggested that adaptiveness,compliance capacity,and financial rationality merit increased attention,intending to improve their ***,the results showed the association of socio-demographics with respondents’perceptions of various indicators of institutional characteristics and their ***,the study provides valuable insights for policymakers,researchers,and development practitioners charged with designing sustainable and effective programs and *** enhance the effectiveness and sustainability of watershed management programs,we recommen

关键词： Watershed Watershed institutions Indicators Institutional characteristics Rationalities Nepal.

Assistive techniques and their added value for tremor classification in multiple sclerosis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第5期19卷 977-978页

作者： nabin Koirala Abdulnasir Hossen Ioannis U.Isaias Jens Volkmann Muthuraman Muthuraman Child Study Center School of MedicineYale UniversityNew HavenCTUSA Department of Electrical&Computer Engineering Sultan Qaboos UniversityAl-KhodMuscatOman Neural Engineering with Signal Analytics and Artificial Intelligence Department of NeurologyUniversity Hospital of WürzburgWürzburgGermany Centro Parkinson e Parkinsonism Azienda Socio Sanitaria Territoriale G.Pini-CTO20126 MilanItaly

Tremor occurs in about half of multiple sclerosis(MS)*** tremor has a broad frequency range of 2.5-7 Hz,with a higher prevalence of postural tremor(44%)compared to intentional tremor(6%)(Alusi et al.,2001).Tremor may affect the upper and lower extremities,head,and trunk,and may even affect the vocal cords in isolated cases of palatal *** tremor is classically attributed to lesions of the brain stem,cerebellum,or cerebellar peduncles,and tremor intensity has been shown to correlate with the number of lesions or their functional ***,recent work has demonstrated that inflammatory damage to the cerebello-thalamic and cortico-thalamic pathways might also play an important role in causing tremor,as it co-occurs with other signs and symptoms of MS such as dysarthria,dysmetria,dysdiadochokinesia,and dystonia(Alusi et al.,2001).

关键词： tremor sclerosis

Funneling current in Si-doped infrared n type-GaAs heterostructures emitter

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2014年第4期7卷 501-508页

作者： Pradip DALAPATI nabin Baran MANIK Asok Nath BASU Condensed Matter Physics Research Center Department of Physics Jadavpur University Kolkata 700032 India

In the present work, we measured the forward bias current-voltage （I-V） characteristics of Si-doped n type gallium arsenide （GaAs） heterostructures infrared emitter over a wide temperature range from 350 to 77 K. Results showed that the slopes of the exponential curve changed slowly with temperature. The analysis of the various tunneling mechanisms indicated that the tunneling current varied approximately as a function of - exp（- αEg ＋ βeV） where the parameters α and β varied indistinctively with temperature and voltage tunneling current on the The dependence of forward temperature and bias can be explained by thermally induced band gap shrinkage and bias induced route change respectively. These results will be helpful for application of the optoelectronics device in both high and low temperature ambiences.

关键词： infrared emitter tunneling characteristic energy band gap thermal stress

Improvement of electrical and photovoltaic properties of methyl red dye based photoelectrochemical cells in presence of single walled carbon nanotubes

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2015年第3期8卷 289-297页

作者： Sujata CHAKRABORTY nabin Baran MANIK Condensed Matter Physics Research Center Department of Physics Jadavpur University Kolkata 700032 India

In this work, we investigated the effect of single walled carbon nanotubes （SWCNT） on the electrical and photovoltaic properties of methyl red （MR） dye based photoelectrochemical cell （PEC）. MR dye based PEC with LiCl04 as ion salt were fabricated with and without mixing SWCNT. The cells were characterized through electrical and optical measurements. The performance of the devices changed drastically in presence of SWCNT. The transition voltage and trap energy of the cells were estimated from the steady-state dark current voltage （I-V） analysis. The transition voltage and trap energy decreased for MR dye cell in presence of SWCNT. Open circuit voltage （Voc）, short circuit current （Jsc）, fill factor （FF） and power conversion efficiency （v/） increased due to the addition of SWCNT. Further measurement of the transient photo- current showed that the growth and decay of photocurrent was quite faster in presence of SWCNT. The photocurrent decay with time was fitted for both the cells and found to follow a power law relation which indicates dispersive transport mechanism with exponential trap states distrib- uted in between lowest unoccupied molecular orbital （LUMO） and highest occupied molecular orbital （HOMO） levels. Possible interpretation is done on the lowering of trap energy with the photocurrent. These results suggest that SWCNT lowers the trap energy of the cells by providing efficient percolation pathways for the conduction of charges. It is expected that due to lowering of trap energy the residing time of the free carriers within the traps decreases. In other words, it may also be said that the charge recombination decreases. These factors affect the overall conduction of charges and improve the electrical and photovoltaic properties.

关键词： methyl red (MR) single walled carbon nanotubes (SWCNT) photoelectrochemical cell (PEC) trap energy percolation pathways

复发性急性胰腺炎病因学分析 ——一项回顾性的临床研究

在线全文

学校读者我要写书评

暂无评论

复发性急性胰腺炎病因学分析 ——一项...

作者： nabin Shrestha（那宾）华中科技大学

学位级别：硕士

目的：很多因素和复发性急性胰腺炎（RAP）的病因学有关。该研究主要目的是探讨RAP的病因学、临床特征及侵袭性和非侵袭性检查方法的病因学诊断价值。方法：筛选以往RAP患者纳入该研究。最初采用非侵袭性检查包括肝功能、空腹血钙... 详细信息

目的：很多因素和复发性急性胰腺炎（RAP）的病因学有关。该研究主要目的是探讨RAP的病因学、临床特征及侵袭性和非侵袭性检查方法的病因学诊断价值。方法：筛选以往RAP患者纳入该研究。最初采用非侵袭性检查包括肝功能、空腹血钙、血脂水平、腹部超声、增强腹部CT和MRCP进行病因学研究。如果患者不能判断病因则采用侵袭性的ERCP检查。如果上述所有检查仍不能确定病因的患者被诊断为特发性复发性急性胰腺炎（IRAP）。结果：RAP患者共119例，平均年龄为41.07±14.84岁，男性占70.58%。91例（76.47%）患者通过非侵袭性检查确定病因，8例（28.57%）患者经ERCP确诊病因。胆源性因素（25.21%）是RAP最常见的病因，其次是饮酒（21.04%）。酒精性因素在男性患者中更普遍（P=0.0463），但胆石症和胰腺分裂（分别P=0.0021、P=0.0474）在女性患者更常见。重症急性胰腺炎和胰腺坏死（分别P=0.0191、P=0.0131）在多病因患者发生比例更高。20例（16.81%）患者没有发现明确病因。结论：胆石症是RAP最常见的病因，其次为饮酒。存在多病因的患者比单病因患者发病趋于更严重。ERCP对IRAP确诊具有重要意义。

关键词：急性胰腺炎复发性急性胰腺炎病因胆源性胰腺炎酒精性胰腺炎