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Microcontroller based AVR Hazardous Gas Detection System using IoT 基于微控制器的物联网AVR有害气体检测系统
Pub Date : 2023-04-29 DOI: 10.5121/ijans.2023.13201
R. Prasad
MQ-6 Semiconductor Sensor for Combustible Gas detection is a Sensitive Gas sensor. The sensitive material of this MQ-6 gas sensor is SnO2, which works with lower conductivity in clean air. When the target combustible gas exist, the sensors conductivity is higher along with the gas concentration rising. As the conductivity increases the current in the circuit of the sensor increases which results in lower sensor resistance. This change is used to correspond, the output signal of gas concentration. MQ-6 gas sensor has high sensitivity to Methane, Propane and Butane and could be used to detect both Methane and Propane. The sensor could be used to detect different combustible gas especially Methane, it is with low cost and suitable for different application.
MQ-6可燃气体检测半导体传感器是一种灵敏气体传感器。这种MQ-6气体传感器的敏感材料是SnO2,它在清洁空气中具有较低的导电性。当目标可燃气体存在时,传感器电导率随气体浓度的升高而升高。随着电导率的增加,传感器电路中的电流增加,导致传感器电阻降低。这个变化用来对应,气体浓度的输出信号。MQ-6气体传感器对甲烷、丙烷和丁烷具有很高的灵敏度,可以同时检测甲烷和丙烷。该传感器可用于检测各种可燃气体,特别是甲烷气体,成本低,适用于不同的应用场合。
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引用次数: 0
A Patch Antenna design with Boosted Bandwidth for ISM band Applications 一种用于ISM波段应用的增强带宽贴片天线设计
Pub Date : 2023-01-30 DOI: 10.5121/ijans.2023.13101
Md. Shaharul Islam, Md. Firoz Ahmed, M. Kabir, Md. Ashraful Islam, Md. Matiqul Islam
In recent times, the utilization of microstrip patch antennas (MPAs) has increased due to their simple production, simple analysis, low cost, lightweight, easy feeding, and superior radiation characteristics. Limited bandwidth is a key disadvantage of MPAs. In this paper, a rectangular patch antenna with partial ground plane (PGP) strategy for ISM applications is proposed to overcome this deficiency and its performance is compared with that of a traditional patch antenna. A low-cost FR-4 substrate with a dielectric constant of 4.3 and a thickness of 1.6 mm is used to make both antennas designed. The antennas are analyzed and simulated at the operating frequency of 2.45 GHz using CST software. The simulation results show that the proposed antenna has a 0.1465 GHz i.e. 146.5 MHz bandwidth, which is more than 1.77 times larger than a conventional antenna (bandwidth = 0.0827 GHz i.e. 82.7MHz). The suggested antenna is suitable for a wide range of wireless communication standards, such as Bluetooth (2.4 to 2.485 GHz), WiMAX (2.3 to 2.4 GHz), Microwave ovens (2.4 to 2.48 GHz), RFID (2.4 to 2.5 GHz), S-Band (2.3 to 2.4 GHz), Wireless Communication Services (WCS) 2.345 GHz to 2.360 GHz, and 4G LTE (2.3 to 2.315 GHz).
近年来,微带贴片天线(MPAs)因其制作简单、分析简单、成本低、重量轻、易于馈电和优越的辐射特性而得到越来越多的应用。有限的带宽是MPAs的一个主要缺点。为了克服这一缺点,本文提出了一种适用于ISM应用的矩形贴片天线,并将其性能与传统贴片天线进行了比较。采用介电常数为4.3、厚度为1.6 mm的低成本FR-4衬底进行天线设计。利用CST软件在2.45 GHz工作频率下对天线进行了分析和仿真。仿真结果表明,该天线的带宽为0.1465 GHz即146.5 MHz,是传统天线(带宽= 0.0827 GHz即82.7MHz)的1.77倍以上。该天线适用于蓝牙(2.4 ~ 2.485 GHz)、WiMAX (2.3 ~ 2.4 GHz)、微波炉(2.4 ~ 2.48 GHz)、RFID (2.4 ~ 2.5 GHz)、S-Band (2.3 ~ 2.4 GHz)、WCS (wireless communication Services) 2.345 GHz ~ 2.360 GHz、4G LTE (2.3 ~ 2.315 GHz)等多种无线通信标准。
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引用次数: 0
Uncovering Fake News by Means of Social Network Analysis 用社会网络分析法揭露假新闻
Pub Date : 2022-10-31 DOI: 10.5121/ijans.2022.12402
P. Shrivastava, Mayank Sharma, Megha Kamble, Vaibhav Gore, Avenash Kumar
The short access to facts on social media networks in addition to its exponential upward push also made it tough to distinguish among faux information or actual facts. The quick dissemination thru manner of sharing has more high quality its falsification exponentially. It is also essential for the credibility of social media networks to avoid the spread of fake facts. So its miles rising research task to robotically check for misstatement of information thru its source, content material, or author and save you the unauthenticated assets from spreading rumours. This paper demonstrates an synthetic intelligence primarily based completely approach for the identification of the fake statements made by way of the use of social network entities. Versions of Deep neural networks are being applied to evalues datasets and have a look at for fake information presence. The implementation setup produced most volume 99% category accuracy, even as dataset is tested for binary (real or fake) labelling with multiple epochs.
在社交媒体网络上获取事实的渠道很短,再加上其呈指数级上升的趋势,也使得人们很难区分虚假信息还是真实信息。通过共享方式的快速传播具有更高的质量和指数性。避免虚假事实的传播对社交媒体网络的可信度也至关重要。因此,它不断增加的研究任务是通过其来源,内容材料或作者来检查信息的错误陈述,并将未经验证的资产从传播谣言中拯救出来。本文展示了一种基于合成智能的完全方法,用于识别通过使用社交网络实体所做的虚假陈述。不同版本的深度神经网络正被应用于评估数据集,并查看虚假信息的存在。实现设置产生了99%的分类准确率,即使数据集被测试为具有多个时代的二进制(真实或虚假)标签。
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引用次数: 0
PAPR Reduction Techniques and Their BIT Error Rate Measurement at OFDM in LTE System LTE系统中OFDM的PAPR降低技术及其误码率测量
Pub Date : 2022-10-31 DOI: 10.5121/ijans.2022.12401
Milon Rana, Tajkuruna Akter Tithy, N. Rahman, M. Hasan
Orthogonal frequency division multiplexing (OFDM) has become an indispensable part of waveform generation in wideband digital communication since its first appearance in digital audio broadcasting (DAB)and it is indeed in use. These descriptions are simplified version of the detailed descriptions provided by 3gpp. It is a superior technology for the high-speed data rate of wire-line and wireless communication systems. The OFDM has many advantages over other techniques such as its high capacity and immunity against multipath fading channels. However ,one of the main drawbacks of the OFDM system is the high-peak-to-average power ratio (PAPR) that leads the system to produce in-band distortion and out-of-band radiation because of the non-linearity and reduces its efficiency is the distortion of the signal caused at the High Power Amplifier (HPA) of a transmitter . Therefore, it is highly desirable to reduce the PAPR of an OFDM signal. For this, numerous techniques have been proposed to overcome the PAPR problem such as i) selective mapping(SLM) ii) partial transmit sequence (PTS), iii) clipping, iv) clipping and filtering. In this paper, the PTS technique was analytically reviewed as one of the important methods to reduce the high PAPR problem. Simulations are used to analyze the efficiency of the techniques used which signifies OFDM to be providing much better PAPR reduction and a better Bit Error Rate (BER) . From simulation results clipping method shows good PAPR reduction with significant amount of BER degradation. Clipping and filtering method shows slight increase in PAPR with small degradation in BER performance than Clipping method and both methods are computationally less complex. PTS provides good PAPR reduction with high computational complexity.
正交频分复用技术(OFDM)自首次出现在数字音频广播(DAB)中以来,已成为宽带数字通信波形产生中不可缺少的组成部分,并得到了广泛的应用。这些描述是3gpp提供的详细描述的简化版本。它是有线和无线通信系统高速数据传输的优越技术。OFDM具有容量大、抗多径衰落信道等优点。然而,OFDM系统的主要缺点之一是峰值平均功率比(PAPR)过高,由于系统的非线性导致系统产生带内失真和带外辐射,降低了系统的效率,这是发射机的高功率放大器(HPA)引起的信号失真。因此,降低OFDM信号的PAPR是非常可取的。为此,已经提出了许多技术来克服PAPR问题,例如i)选择性映射(SLM) ii)部分传输序列(PTS), iii)裁剪,iv)裁剪和滤波。本文对PTS技术作为降低高PAPR问题的重要方法之一进行了分析综述。仿真用于分析所使用的技术的效率,表明OFDM提供更好的PAPR降低和更好的误码率(BER)。从仿真结果来看,裁剪方法在显著降低误码率的同时,具有较好的PAPR降低效果。与裁剪滤波相比,裁剪滤波方法的PAPR略有增加,BER性能下降较小,并且两种方法的计算复杂度较低。PTS提供了良好的PAPR降低,但计算复杂度高。
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引用次数: 0
PAPR Reduction and Bit Error Rate Evaluation in OFDM System using Hybrid Techniques 基于混合技术的OFDM系统PAPR降低和误码率评估
Pub Date : 2022-07-31 DOI: 10.5121/ijans.2022.12301
Md. Dulal Haque, Milon Rana, Tajkuruna Akter Tithy
Orthogonal frequency division multiplexing (OFDM) has become an important component of waveform generation in wideband transmission. it's a superior technology for the high-speed rate of wired and wireless communication systems. Currently, multiple-input multiple-output orthogonal frequency division multiplexing (MIMO OFDM) systems are crucial wireless communication systems like 4G and 5G networks & tactical communication. The OFDM has many advantages over other techniques like its high capacity and immunity against multipath fading channels. However, one amongst the foremost drawbacks of the OFDM system is that the high-peak-to-average power ratio (PAPR) that leads the system to provide in-band distortion and out-of-band radiation and reduces its efficiency. This problem increases with a rise within the number of transmit antennas. Therefore, it's highly desirable to cut back the PAPR of an OFDM signal. For this, numerous techniques are proposed to beat the PAPR problem like i) Selective mapping (SLM) ii) Partial transmit sequence (PTS), iii) Clipping, iv) Clipping and filtering. All of those are reduced the PAPR by generating alternative subcarrier vector that are statistically independent OFDM symbols for a given data frame and transmitting the symbol with rock bottom peak power. During this paper we also proposed, some hybrid techniques. The hybrid techniques are the technique of clipping is employed in conjunction with SLM and PTS to cut back computational complexity. And also the combination of SLMPTS to scale back PAPR. Simulations are acquainted with analyze the efficiency of the techniques used which signifies OFDM to be providing much better PAPR reduction and a way better Bit Error Rate (BER). it's shown in simulation results that the proposed scheme performs well reducing PAPR. But the proposed scheme is more complex than the prevailing techniques.
正交频分复用技术(OFDM)已成为宽带传输中波形产生的重要组成部分。对于有线和无线通信系统的高速速率来说,这是一项卓越的技术。目前,多输入多输出正交频分复用(MIMO OFDM)系统是4G、5G网络和战术通信等关键无线通信系统。与其他技术相比,OFDM具有容量大、抗多径衰落等优点。然而,OFDM系统最主要的缺点之一是峰值平均功率比(PAPR)高,导致系统提供带内失真和带外辐射,降低了系统的效率。这个问题随着发射天线数量的增加而增加。因此,降低OFDM信号的PAPR是非常可取的。为此,提出了许多技术来解决PAPR问题,如i)选择性映射(SLM) ii)部分传输序列(PTS), iii)裁剪,iv)裁剪和滤波。所有这些都是通过为给定数据帧生成统计独立的OFDM符号的替代子载波矢量并以最低峰值功率传输符号来降低PAPR。在本文中,我们还提出了一些混合技术。混合技术是将裁剪技术与SLM和PTS相结合,以降低计算复杂度。还有SLMPTS的组合,以减少PAPR。仿真结果表明,OFDM具有更好的PAPR降低和更好的误码率(BER)。仿真结果表明,该方案能较好地降低PAPR。但是,所提出的方案比目前流行的技术更为复杂。
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引用次数: 0
Design of a Compact Circular Microstrip Patch Antenna for WLAN Applications 一种用于WLAN应用的紧凑型圆形微带贴片天线的设计
Pub Date : 2021-07-31 DOI: 10.5121/ijans.2021.11301
Chaitali Mukta, Mahfujur Rahman, A. Z. M. T. Islam
This paper presents the design of a compact circular microstrip patch antenna for WLAN applications which covers the band 5.15 to 5.825 GHz. The antenna is designed using 1.4mm thick FR-4 (lossy)substrate with relative permittivity 4.4 and a microstrip line feed is used. The radius of the circular patch is chosen as 7.62mm. To reduce the size and enhance the performance of the proposed antenna, a circular slot is loaded on circular patch and a square slot is etched on the ground plane of dimension 30mm×30mm. Design of the antenna is carried out using CST Microsoft Studio Sonimulation Software. The proposed antenna resonates at 5.5 GHz with a wider bandwidth of 702 MHz and it provides low return loss of -31.58 dB, good gain of 3.23 dB and directivity of 4.28 dBi and high efficiency of around 79% against the resonance frequency. The geometry of the proposed circular antenna with reduced size and its various performance parameters such as return loss, bandwidth, VSWR, gain, directivity, efficiency and radiation pattern plots are presented and discussed
本文设计了一种适用于无线局域网的小型圆形微带贴片天线,覆盖5.15 ~ 5.825 GHz频段。天线采用相对介电常数4.4的1.4mm厚FR-4(有损)衬底,采用微带馈线。圆形贴片的半径选择为7.62mm。为了减小天线的尺寸,提高天线的性能,在圆形贴片上加载一个圆形的槽,在尺寸为30mm×30mm的接平面上刻蚀一个方形的槽。采用CST Microsoft Studio仿真软件对天线进行设计。该天线谐振频率为5.5 GHz,带宽为702 MHz,回波损耗为-31.58 dB,增益为3.23 dB,指向性为4.28 dBi,相对于谐振频率的效率约为79%。提出并讨论了减小尺寸的圆形天线的几何形状及其各种性能参数,如回波损耗、带宽、驻波比、增益、指向性、效率和辐射方向图
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引用次数: 4
A Trust-Based Predictive Model for Mobile Ad Hoc Networks 基于信任的移动Ad Hoc网络预测模型
Pub Date : 2021-07-31 DOI: 10.5121/ijans.2021.11302
K. Divya, B. Srinivasan
The Internet of things (IoT) is a heterogeneous network of different types of wireless networks such as wireless sensor networks (WSNs), ZigBee, Wi-Fi, mobile ad hoc networks (MANETs), and RFID. To make IoT a reality for smart environment, more attractive to end users, and economically successful, it must be compatible with WSNs and MANETs. In light of this, the present paper discusses a novel quantitative trust model for an IoT-MANET. The proposed trust model combines both direct and indirect trust opinion in order to calculate the final trust value for a node. Further, a routing protocol has been designed to ensure the secure and reliable end-to-end delivery of packets by only considering trustworthy nodes in the path. Simulation results show that our proposed trust model outperforms similar existing trust models.
物联网(IoT)是由不同类型的无线网络(如无线传感器网络(wsn)、ZigBee、Wi-Fi、移动自组织网络(manet)和RFID)组成的异构网络。为了使物联网成为智能环境的现实,对最终用户更具吸引力,并在经济上取得成功,它必须与wsn和manet兼容。鉴于此,本文讨论了一种新的物联网- manet定量信任模型。提出的信任模型结合直接信任意见和间接信任意见来计算节点的最终信任值。此外,还设计了一种路由协议,通过只考虑路径中值得信赖的节点来确保包的安全可靠的端到端传输。仿真结果表明,本文提出的信任模型优于现有的类似信任模型。
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引用次数: 0
Cluster Based Fidelity to Secure DSDV Protocol Against Black Hole Attacks 基于簇的保真度保护DSDV协议免受黑洞攻击
Pub Date : 2019-10-31 DOI: 10.5121/ijans.2019.9401
S. Boujaada, Y. Qaraai, S. Agoujil
In this paper, we introduce and discuss an approach that will be used to secure the DSDV routing protocol in an ad-hoc network. Due to mobility and absence of infrastructure, nodes are more vulnerable to several malicious attacks. The secure routing is essential to transmit packets from source to the destination. Our approach consists to model and manage fidelity concept in an ad-hoc clustering architecture. Clustering makes it possible to group the mobile nodes and to send data simultaneously to the each group. Our security model thus aims to integrate mechanisms against black hole attacks, forcing cooperation between nodes and detecting failing behaviors. The nodes present in the clusters will work more efficiently and the message passing within the nodes will also get more authenticated from the cluster heads. The simulation of our proposed algorithm is carried out using NS2 network simulator by evaluating some network performances such as average delay, throughput of communication and packets loss.
在本文中,我们介绍并讨论了一种在ad-hoc网络中用于保护DSDV路由协议的方法。由于移动性和基础设施的缺乏,节点更容易受到多种恶意攻击。安全路由是数据包从源到目的传输的必要条件。我们的方法包括在一个特别的集群架构中建模和管理保真度概念。集群使得对移动节点进行分组并同时向每个组发送数据成为可能。因此,我们的安全模型旨在集成对抗黑洞攻击的机制,强制节点之间的合作并检测失败行为。集群中的节点将更有效地工作,并且在节点内传递的消息也将从集群头获得更多的身份验证。利用NS2网络模拟器对该算法进行了仿真,评估了平均时延、通信吞吐量和丢包率等网络性能。
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引用次数: 0
Framework, Implementation and Algorithm for Asynchronous Power Saving of UWBMAC with Steerable Directional Antenna In MANETS MANETS中可操纵定向天线UWBMAC异步节能的框架、实现与算法
Pub Date : 2019-04-30 DOI: 10.5121/IJANS.2019.9201
Murtala Muhammad, Abubakar GidadoHalilu, Sanusi Mohammed Bunu
Asynchronous Power Saving (APS) technique is one of the unique standard used in Mobile Ad hoc Networks to conserve more energy in the system. This technique when combined with other power saving systems like Ultra WideBand System and the use of Directional antenna in MANETs provides astonishing result. In designing Medium Access Control (MAC), developing a framework and giving a detailed implementation procedure are among the factors that hinder the process; specifically in MANETs not to mention the Algorithm. This paper aimed at exploring a standard framework, implementation procedure and Algorithm for designing an Asynchronous Power Saving Ultra WideBandMeduim Access Control (UWB-MAC) in MANETs using directional antenna. An implementation procedure that comprises of transmission, channelization, and receiver pattern of the Physical layer is specified in this research work. The paper concludes with an algorithm for an Asynchronous Power Saving UWB-MAC using a Steerable Directional antenna in MANETs.
异步节能(APS)技术是移动自组网中采用的一种独特的节能技术。该技术与其他节电系统(如超宽带系统)和在manet中使用定向天线相结合,可提供惊人的结果。在设计介质访问控制(MAC)时,开发一个框架和给出详细的实现程序是阻碍这一过程的因素之一;特别是在manet中,更不用说算法了。本文旨在探讨一种基于定向天线的异步省电超宽带介质访问控制(UWB-MAC)的标准框架、实现过程和算法。提出了一种由传输、信道化和物理层接收模式组成的实现过程。最后,提出了一种基于可控方向天线的异步省电UWB-MAC组网算法。
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引用次数: 1
Cross Layer Design Approach for Efficient Data Delivery Based on IEEE 802.11P in Vehicular Ad-Hoc Networks (VANETS) for City Scenarios 城市场景下基于IEEE 802.11P的车载自组织网络(VANETS)高效数据传输的跨层设计方法
Pub Date : 2018-10-30 DOI: 10.5121/IJANS.2018.8401
M. Abdelgadir, R. Saeed, Abuagla Babiker
Intelligent Transportation Systems (ITS) have been one of the promising technology that has a great interest attention from many researchers over the world. Vehicular Ad-hoc Network (VANET) communications environment as a part of ITS opens the way for a wide range of applications such as safety applications, mobility and connectivity for both driver and passengers to exploit the transport systems in a smoothly, efficiently and safer way. Several challenging tasks facing adopting VANET functionality for ITS such as modelling of wireless transmission and routing issues. These research issues have become more critical due to the high mobility of vehicles nodes (transmitters and receivers) and unexpected network topology due to the high speed of nodes. In fact, modelling radio propagation channel in VANET environment which considers as one of a stringent communications environment is a challenging task. The selection of a suitable transmission model plays a key role in the routing decisions for VANET. Different propagation models allow calculating the Received Signal Strength (RSS) based on key environmental properties such as the distance between transmitter vehicle and a receiver vehicle, the gain and antenna height of transmitter and a receiver vehicles. Hence, it is useful to calculate RSS and SNR values for a specific propagation model and then these values can be used later for routing decision in order to find the best path with high SNR. This paper evaluates the performance of different transmission models (freespace, two-ray and log-normal) in terms of Receive Signal Strength (RSS). In addition, the performance of such wireless transmission models for vehicular communication in terms of PDR, throughput and delay is evaluated by applying the proposed cross layer routing approach based on IEEE 802.11p. By using MATLAB, the obtained results confirm the best packet delivery ratio for our proposed approach, where it indicates poor quality of DSSS PHY with high number vehicles. The minimum delay achieved when traffic density is decreased.
智能交通系统(ITS)已成为一项具有发展前景的技术,受到了世界各国研究者的极大关注。车载自组织网络(VANET)通信环境作为ITS的一部分,为安全应用、移动性和连接性等广泛应用开辟了道路,使驾驶员和乘客都能以平稳、高效和更安全的方式利用交通系统。在ITS中采用VANET功能面临的几个具有挑战性的任务,例如无线传输建模和路由问题。由于车辆节点(发射器和接收器)的高移动性以及节点高速导致的意外网络拓扑结构,这些研究问题变得更加关键。事实上,在VANET环境下建立无线电传播信道模型是一项具有挑战性的任务,它被认为是一个严格的通信环境。选择合适的传输模型在VANET的路由决策中起着关键作用。不同的传播模型允许基于关键环境属性计算接收信号强度(RSS),例如发射车辆和接收车辆之间的距离,发射车辆和接收车辆的增益和天线高度。因此,计算特定传播模型的RSS和SNR值是有用的,然后这些值可以用于路由决策,以便找到具有高信噪比的最佳路径。本文从接收信号强度(RSS)的角度对不同传输模式(自由空间、双射线和对数正态)的性能进行了评价。此外,应用所提出的基于IEEE 802.11p的跨层路由方法,从PDR、吞吐量和延迟等方面评估了车载通信无线传输模型的性能。通过MATLAB测试,得到的结果证实了我们提出的方法的最佳数据包传输比,其中它表明车辆数量多的DSSS PHY质量较差。当交通密度降低时所达到的最小延迟。
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引用次数: 10
期刊
International Journal on AdHoc Networking Systems
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