检索结果-南通市图书馆

Energy-aware proof-of-authority:Blockchain consensus for clustered wireless sensor network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Blockchain(Research and Applications) 2024年第3期5卷 153-167页

作者： Delphi Hanggoro Jauzak Hussaini Windiatmaja Abdul Muis riri Fitri Sari Evangelos Pournaras Department of Electrical Engineering Faculty of EngineeringUniversitas IndonesiaDepok 16424Indonesia School of Computing University of LeedsLeeds LS29JTUK

This study addresses integrating blockchain technology into lightweight devices,specifically clustered Wireless Sensor Networks(WSNs).Integrating blockchain into the WSNs solves the problems of heterogeneity,data integrity,and data ***,no blockchain integration considers network lifetime in *** research focuses on developing a permissioned blockchain system that incorporates a consensus mechanism known as Proof-of-Authority(PoA)within clustered WSNs with two main *** first feature is to enhance the network lifetime by introducing a rotational selection of block proposers using an Energy-Aware PoA(EAPoA)weighting *** as the Multi-Level Blockchain Model(MLBM),the subsequent feature is to create a hierarchical network model within a blockchain *** MLBM network comprises both local and master *** cluster inside a WSN possesses its local blockchain *** the MLBM,the local blockchain creates a block on the main blockchain by proposing the headers of every 10 blocks to improve data *** local blockchain has its leader,which can increase block *** results show that the proposed solution can overcome traditional PoA performance and is suitable for clustered *** terms of lifetime,the EA-PoA selection method can extend the network lifetime by up to 10%.In addition,the MLBM can increase block production by up to twice each additional cluster compared to a single blockchain network used in traditional PoA.

关键词： Blockchain consensus Proof-of-authority(PoA) Leader selection Wireless sensor network Network lifetime

PoIR: A Node Selection Mechanism in Reputation-Based Blockchain Consensus Using Bidirectional LSTM Regression Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第11期77卷 2309-2339页

作者： Jauzak Hussaini Windiatmaja Delphi Hanggoro Muhammad Salman riri Fitri Sari Department of Electrical Engineering Faculty of EngineeringUniversitas IndonesiaDepok16424Indonesia

This research presents a reputation-based blockchain consensus mechanism called Proof of Intelligent Reputation(PoIR)as an alternative to traditional Proof of Work(PoW).PoIR addresses the limitations of existing reputationbased consensus mechanisms by proposing a more decentralized and fair node selection *** proposed PoIR consensus combines Bidirectional Long Short-Term Memory(BiLSTM)with the Network Entity Reputation Database(NERD)to generate reputation scores for network entities and select authoritative *** records network entity profiles based on various sources,i.e.,Warden,Blacklists,DShield,AlienVault Open Threat Exchange(OTX),and MISP(Malware Information Sharing Platform).It summarizes these profile records into a reputation score *** PoIR consensus mechanism utilizes these reputation scores to select authoritative *** evaluation demonstrates that PoIR exhibits higher centralization resistance than PoS and *** nodes were selected fairly during the 1000-block proposal round,ensuring a more decentralized blockchain *** contrast,malicious nodes successfully monopolized 58%and 32%of transaction processes in PoS and PoW,respectively,but failed to do so in *** findings also indicate that PoIR offers efficient transaction times of 12 s,outperforms reputation-based consensus such as PoW,and is comparable to reputation-based consensus such as ***,the model evaluation shows that BiLSTM outperforms other Recurrent Neural Network models,i.e.,BiGRU(Bidirectional Gated Recurrent Unit),UniLSTM(Unidirectional Long Short-Term Memory),and UniGRU(Unidirectional Gated Recurrent Unit)with 0.022 Root Mean Squared Error(RMSE).This study concludes that the PoIR consensus mechanism is more resistant to centralization than PoS and *** BiLSTM and NERD enhances the fairness and efficiency of blockchain applications.

关键词： Blockchain blockchain consensus node selection BiLSTM RNN regression

A Discrimination Index Based on Jain's Fairness Index to Differentiate Researchers with Identical H-index Values

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 Data and Information Science 2020年第4期5卷 5-18页

作者： Adian Fatchur Rochim Abdul Muis riri Fitri Sari Department of Computer Engineering Diponegoro UniversityTembalangSemarang 50275Indonesia Department of Electrical Engineering Universitas IndonesiaDepok 16424Indonesia

Purpose:This paper proposes a discrimination index method based on the Jain’s fairness index to distinguish researchers with the same ***/methodology/approach:A validity test is used to measure the correlation of D-offset with the parameters,i.e.H-index,the number of cited papers,the total number of citations,the number of indexed papers,and the number of uncited *** correlation test is based on the Saphiro-Wilk method and Pearson’s product-moment ***:The result from the discrimination index calculation is a two-digit decimal value called the discrimination-offset(D-offset),with a range of D-offset from 0.00 to *** result of the correlation value between the D-offset and the number of uncited papers is 0.35,D-offset with the number of indexed papers is 0.24,and the number of cited papers is *** test provides the result that it is very unlikely that there exists no relationship between the *** implications:For this reason,D-offset is proposed as an additional parameter for H-index to differentiate researchers with the same *** H-index for researchers can be written with the format of“H-index:D-offset”.Originality/value:D-offset is worthy to be considered as a complement value to add the H-index *** the D-offset is added in the H-index value,the H-index will have more discrimination power to differentiate the rank of the researchers who have the same H-index.

关键词： Discrimination index D-offset Validity Jain’s fairness index

Furanocembranoid from the Okinawan soft coral Sinularia sp.

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

Natural Products and Bioprospecting 2022年第1期12卷 71-77页

作者： Misaki Nagasaka Kazuki Tani Keisuke Nishikawa riri Kinjo Takahiro Ishii Department of Biosciences and Biotechnology Faculty of AgricultureUniversity of the RyukyusSenbaru 1NishiharaOkinawa 903-0213Japan Department of Chemistry Graduate School of ScienceOsaka City UniversityOsaka 558-8585Japan

One new furanocembranoid diterpene,11-hydroxy-Δ^(12(13))-pukalide(1),along with six known secondary metabolites,11-acetoxy-Δ^(12(13))-pukalide(2),13α-acetoxypukalide(3),pukalide(4),3α-methoxyfuranocembranoid(5),Δ9(15)-africanene(6),and methyl(5′E)-5-(2′,6′-dimethylocta-5′,7′-dienyl)furan-3-carboxylate(7)were isolated from the Okinawan soft coral Sinularia *** chemical structures were elucidated based on spectroscopic analysis(FTIR,NMR,and HRESIMS),and the relative stereochemistry of 1 was determined by NOESY experiments and acetylation,which yielded derivative *** addition,compounds 1 and 7 exhibited toxicity in the brine shrimp lethality test.

关键词： Soft coral Sinularia sp. Furanocembranoid Diterpene

Crystal:History and Craftsmanship

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China & The World Cultural Exchange 2010年第10期76卷 34-37页

作者： riri Jieyuan

Crystal has always inspired human imagination, as it features ice-like texture of transparency and color variation and is mostly found underground or in rock caves. Ancient Chinese

关键词：水晶工艺历史古代中国颜色变化想象力冰

Painted and Crafted Gourd:a Traditional Art of China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China & The World Cultural Exchange 2010年第7期76卷 32-34页

作者： riri Jieyuan

Chinese culture is known for its obscurity,profundity and *** the word "gourd"is homophonic with"fortune"

关键词：葫芦传统艺术中国中华文化分支机构财富吉祥世代

Composition, Stability and Probable Structure of a Colourless Organometallic Complex (Gd(III)-Malic Acid)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Physical Chemistry 2013年第1期3卷 49-58页

作者： Mohammed riri Oussama Kamal Abdelkhalek Benjjar Farid Serdaoui Miloudi Hlaibi Laboratoire d’Interface Matériaux et Chimie de l’Environnement UniversitéHassan II Facultédes Sciences Ain ChockCasablancaMaroc Laboratoire des Polymères BiopolymèresSurfacesFacultédes SciencesUniversitéde RouenRouenFrance

The formation of colourless gadolinium complexes (x,y,z), between x gadolinium ions, y ligands and z protons, of some organic acids, has been studied in aqueous solution. In this work we present the results of investigations on the interaction of the gadolinium ion (Gd3+) with malic acid (C4H6O5, a-hydroxyl dicarboxylic acid), in dilute aqueous solution for pH values between 5.5 and 7.5. Colourless gadolinium complexes of malate ions have no absorption band UV-visible, the indirect photometric detection (IPD) technique was used and studies have identified a major tri-nuclear complex of malate ion (﹣OOC-CH2-CHOH-COO﹣). The formation of this new colourless complex is derived from three Gd(III) ions that react with two malate ions and two hydronium ions (H3O+), giving for this colourless complex, a (3,2,2) composition and apparent stability constant depends on the acidity of the medium, with logK'322 = 18.88 ± 0.05 at pH = 6.30. To complement previous results and to propose a probable structure for this new complex detected in solution, studies of IR spectroscopy have been conducted to identify the chelation sites for both ligands. The results were analysed and show that this organometallic gadolinium complex, contains two different sites, respectively, two lateral tetradentate mono-nuclear sites and a single central bidentate mono-nuclear site. From these results, the reaction of formation, the stability constant and the probable structure of this new colourless organometallic gadolinium complex are proposed.

关键词： Gadolinium Complexes Malate Ions Indirect Photometric Detection(IPD) Apparent Stability Constant Chelation Sites Bidentate Mono-Nuclear Tetradentate Mono-Nuclear

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

“少男杀手”蔡依林

当代电视 2000年第8期 26-27页

作者： riri

有人说她长得有点像林心如，有人说她在和张柏芝抢玉女宝座，又听说她的歌迷大多是小男生，所以她也被称为“少男杀手”，你应该知道她是谁了吧?对，她就是现在火得不得了的蔡依林。你对她的了解也许只是那清纯可爱的外型和那时而韵力... 详细信息

有人说她长得有点像林心如，有人说她在和张柏芝抢玉女宝座，又听说她的歌迷大多是小男生，所以她也被称为“少男杀手”，你应该知道她是谁了吧?对，她就是现在火得不得了的蔡依林。你对她的了解也许只是那清纯可爱的外型和那时而韵力、时而柔情的歌声，你不知道吧其实她有问必答的坦率直接，更让人喜欢。

关键词：蔡依林杀手林心如张柏芝

Stability Studies of Lysine Acetylsalicylate(Aspirin Derivative):Mechanisms of Hydrolysis

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

Open Journal of Physical Chemistry 2012年第2期2卷 81-87页

作者： Oussama Kamal Abdelaziz Benlyamani Farid Serdaoui Mohammed riri Abdelmjid Cherif Miloudi Hlaibi Laboratoire d’Interface Matériaux d’Electrochimie et Chimie de l’Environnement(LIME) UniversitéHassan II Facultédes Sciences Aïn ChockCasablancaMorocco Laboratoire des Polymères BiopolymèresSurfacesUMR 6270 du CNRSFacultédes SciencesUniversitéde RouenMont-Saint-AignanFrance

To control the stability of the lysine acetylsalicylate compound (LAS) in aqueous solution, some studies of the hydronium ion-catalyzed, hydroxide ion-catalyzed, and spontaneous reactions of this active ingredient in water solutions have been carried out. The pH-rate profile (log kobs = f(pH)), shows that the hydrolysis reaction of the LAS, is conducted by a catalysis acid-base mechanism, with multiple reaction pathways. The rate constants, kH, kOH and k0 to the reaction pathways catalyzed by H3O+, HO– ions and to the spontaneous reaction, for the hydrolysis reaction of the reagent LAS, were determined. The results show that the studied compound LAS is unstable in basic medium and the hydrolysis reaction catalyzed by HO– ions is *** a known acidity (pH ≈ 10), studies conducted for different temperatures of the medium, clearly indicate, that the experimental rate constant kobs,depends on the temperature according to the Arrhenius equation. The activation parameters: activation energy (Ea), enthalpy (ΔH≠) and entropy (ΔS≠), for the transition state were determined, The very negative value obtained for the activation parameter ΔS*, first indicates that in the transition state there is gain in order, then this late state, resembles the products and that probably for the mechanism of the LAS hydrolysis reaction catalyzed by HO– ions, the rate-determining step is a bimolecular reaction. Finally from all these results, the mechanism for the reaction pathway catalyzed by HO– ions has been elucidated.

关键词： Lysine Acetylsalicylate Hydronium Ions Hydroxide Catalyzed Catalysis Acid-Base Mechanism Multiple Reaction Pathways Activation Parameters