Study of Voice Communication System Based on FreeSWITCH

2021 ◽  
Vol 105 ◽  
pp. 331-338
Author(s):  
Fu Xing Qin ◽  
Li Zhang ◽  
Zhong Wang
Keyword(s):  
Communication Technology ◽  
Rapid Development ◽  
Secondary Development ◽  
Switching Network ◽  
Circuit Switching ◽  
Long Distance ◽  
Soft Switch ◽  
Voice Communication ◽  
Controlled Switching ◽  
Traditional Program

With the rapid development of communication technology, modern communication technology has been widely penetrated into modern national defense, science and technology, people's life and other fields, and has become a means to provide high-quality and seamless information communication between people and machines. With the rapid development of computer technology and the Internet, the traditional program-controlled switching technology has come to an end, and the soft-switch network based on IP technology and packet switching has gradually replaced the program-controlled switching network based on circuit switching and become the mainstream of today's communication network world. The rapid development of VOIP telephony reduces the cost of domestic and international long-distance telephony, benefiting consumers. Digital mobile communication expands channel capacity, improves service quality and promotes the rapid development of this industry. Based on the secondary development of the open source FreeSWITCH software, this paper develops a VOIP voice system based on IP technology to meet different user needs intelligently [1].

scholarly journals Optimization and Evaluation of Platooning Car-Following Models in a Connected Vehicle Environment

2021 ◽  
Vol 13 (6) ◽  
pp. 3474
Author(s):  
Guang Yu ◽  
Shuo Liu ◽  
Qiangqiang Shangguan
Keyword(s):  
Communication Technology ◽  
Intelligent Transportation Systems ◽  
Rapid Development ◽  
Safety Margin ◽  
Practical Method ◽  
Transportation Systems ◽  
Systematic Evaluation ◽  
Connected Vehicle ◽  
Car Following ◽  
Cooperative Driving

With the rapid development of information and communication technology, future intelligent transportation systems will exhibit a trend of cooperative driving of connected vehicles. Platooning is an important application technique for cooperative driving. Herein, optimized car-following models for platoon control based on intervehicle communication technology are proposed. On the basis of existing indicators, a series of evaluation methods for platoon safety, stability, and energy consumption is constructed. Numerical simulations are used to compare the effects of three traditional models and their optimized counterparts on the car-following process. Moreover, the influence of homogenous and heterogeneous attributes on the platoon is analyzed. The optimized model proposed in this paper can improve the stability and safety of vehicle following and reduce the total fuel consumption. The simulation results show that a homogenous platoon can enhance the overall stability of the platoon and that the desired safety margin (DSM) model is better suited for heterogeneous platoon control than the other two models. This paper provides a practical method for the design and systematic evaluation of a platoon control strategy, which is one of the key focuses in the connected and autonomous vehicle industry.

Measuring Dynamic Sales Impacts of LBA Using Wireless Communication Technology

2013 ◽  
Vol 662 ◽  
pp. 896-901
Author(s):  
Zong Jin Liu ◽  
Yang Yang ◽  
Zheng Fang ◽  
Yan Yan Xu
Keyword(s):  
Wireless Communication ◽  
Error Correction ◽  
Communication Technology ◽  
Dynamic Error ◽  
Rapid Development ◽  
Vector Autoregressive ◽  
Vector Error Correction ◽  
Vector Error ◽  
Equilibrium Relationship

Because of rapid development of wireless communication technology, there is an increasing adoption of mobile advertising, such as location based advertising (LBA). To what extent can LBA improve advertising effectiveness is an important topic in the field of wireless communication technology research. Most researches quantify long term impacts of advertisings by VAR (Vector Autoregressive) model. However, compared to VAR model, VECM (Vector Error Correction Model) is a better method in that it allows one to estimate both a long-term equilibrium relationship and a short-term dynamic error correction process. In this study, we employ VECM to explore LBA’s (Location Based Advertising) and PUA’s (Pop-up Advertising) sales impact in both short and long terms. The developed VECM reveals that LBA’s sales impact is about more than2 times as big as PUA’s in short dynamic term and nearly 6 times bigger than PUA’s in long equilibrium term. These findings add to advertising and VECM literatures. These results can give managers more confident to apply wireless communication technology to advertising.

Chinese Business Practice in the Late Imperial Period

2013 ◽  
Vol 14 (4) ◽  
pp. 769-793 ◽  
Author(s):  
Madeleine Zelin
Keyword(s):  
Rapid Development ◽  
Chinese Economy ◽  
Long Distance ◽  
Late Imperial ◽  
Market Expansion ◽  
Chinese Business ◽  
Everyday Practices ◽  
Imperial Period ◽  
Business In China ◽  
The Impact

The rapid development of the Chinese economy over the past several decades has stimulated new interest in the institutions, practices, and social formations that supported the development of business in China before the intensification of pressure from Western traders to conform to “modern” practices in the late nineteenth and early twentieth centuries. This article aims to provide a foundation for understanding merchant practice as it developed during the important years of market expansion during the last Chinese dynasty and to dispel some of the enduring myths about the Chinese merchant, his relationship to family, community, and the state, and the ideological constraints on his activities. To that end I examine several aspects of late imperial merchant culture, beginning with the everyday practices that allowed business to flourish in the Qing, turning next to the large social formations through which long-distance merchants in particular identified and pursued their interests, and ending with some preliminary thoughts on the impact of the laissez-faire policies of the last dynasty and their implications for post-Imperial China.

scholarly journals Peran Media Sosial Bagi Suami Istri dalam Menjalani Hubungan Pernikahan Jarak Jauh

AL-HUKAMA ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 359-479
Author(s):  
Maulidia Mulyani
Keyword(s):  
Social Media ◽  
Communication Technology ◽  
Technological Progress ◽  
Marital Relationship ◽  
Married Couples ◽  
Marital Relationships ◽  
Long Distance ◽  
Relationship Of ◽  
The Impact ◽  
The Relationship

In the present time the impact of technological progress can be felt in many aspects of life, including marriage. The progress of the development of communication technology has made it easy to communicate specifically for married couples who are undergoing long-distance marital relationships, so that the relationship is maintained and harmonious. Social media is now used as a tool for communication, for example WhatsApp, Line, Facebook, or Instagram. All of those media are used because of their speed in conveying messages, so that long-distance couples can still communicate well and quickly. In a marital relationship, of course, there are fulfillments of rights and obligations. These fulfillments can still be fulfilled through social media, but they are not as maximized as when dealing directly.

scholarly journals PERBANDINGAN ALTERNATIF ASPEK PEMAJAKAN BAGI PENYEDIA LAYANAN OVER THE TOP ASING

2019 ◽  
Vol 1 (1) ◽  
pp. 10
Author(s):  
Hendrie Ardhiansyah ◽  
Nurhidayati Nurhidayati
Keyword(s):  
Information And Communication Technology ◽  
Communication Technology ◽  
Rapid Development ◽  
Digital Economy ◽  
Case Study Approach ◽  
Study Approach ◽  
Foreign Companies ◽  
Information And Communication ◽  
Over The Top

Over the years, the rise of digital economy has confused countries in their efforts to tax foreign companies without physically presence within their jurisdiction. One of the potential tax revenues that have not been optimally digging comes from the digital sector. The digital economy sector has enormous potential along with the rapid development of information and communication technology, especially the internet. This digital economy market is dominated by internet-based services commonly called Over The Top (OTT) services and is filled with global content owned by foreign companies. This article argues the provisions of taxation for foreign OTT lending providers in England, Australia, India, and Japan. This research used a qualitative non-case study approach. This study outlines the strengths and weaknesses of each alternative.

scholarly journals Implementation of Human Resources Information Systems in Industrial Revolution 4.0: Case Study of Sekolah Tinggi Pariwisata Bali Internasional

2020 ◽  
Vol 6 (2) ◽  
pp. 367
Author(s):  
Kadek Ari Styawati ◽  
A.A.N. Eddy Supriyadinata Gorda
Keyword(s):  
Human Resources ◽  
Information And Communication Technology ◽  
Communication Technology ◽  
Industrial Revolution ◽  
Rapid Development ◽  
Organizational Management ◽  
Inhibiting Factors ◽  
Human Resources Information Systems ◽  
Information And Communication

The rapid development of information and communication technology offers solutions in effective and efficient organizational management. The implementation of information technology becomes an important aspect in the competition in the digital arena. This study aims to examine in-depth about how the application of HRIS in STPBI. The research results showed that the implementation of HRIS at STPBI is used as a strategic activity in optimizing HR functions. The transformation and implementation of HRIS has several supporting and inhibiting factors. These supporting and inhibiting factors are combined in the development of HR in line with the theoretical and literary concepts used in this study. Through integrated work synergies in the field of staffing, transparency and availability of information is very helpful in decision making. The implementation of HRIS at STPBI is based on the paradigm of a balance between supporting factors and inhibiting factors.

Chirp Spreading Spectrum in Imperfect Environment and Wireless Tree Topology Network

2021 ◽  
Author(s):  
Hongqiang Li ◽  
Dongyan Zhao ◽  
Xiaoke Tang ◽  
Jie Gan ◽  
Xu Zhao ◽  
...  
Keyword(s):  
Low Power ◽  
Rapid Development ◽  
Single Point ◽  
Multipath Fading ◽  
Tree Topology ◽  
Area Network ◽  
Wide Area Network ◽  
Target Node ◽  
Long Distance ◽  
And Performance

With the rapid development of IoT technology in recent years, higher requirements have been put forward for wireless communication technology. Low Power Wide Area Network (LPWAN) technology is emerging rapidly, the technology is characterized by low power consumption, low bandwidth, long-distance, and a large number of connections, and is specifically designed for Internet of Things applications. LoRa (Low Power Long Range Transceiver), as a typical representative of LPWAN technology, has been widely concerned and studied. This paper analyzes the performance of LoRa modulation in the tree topology network and analyzes the performance of LoRa modulation in the imperfect environment for point-to-point communication and multipoint-to-point communication. From theoretical analysis and performance simulation, it can be seen that the influence of frequency offset or multipath fading on LoRa signal is very obvious. However, when LoRa modulation is used for networking, multi-user interference will be introduced. Under the influence of many imperfect factors, the signal receiver performance of LoRa modulation will be difficult to guarantee. Because of these effects, Coordinated Multiple Points based on Timing Delay (DCoMP) is presented. Multiple nodes close to each other send the same data to the target node. Due to the inaccurate synchronization between nodes, there will be a certain relative delay when sending signals to the same target node. After the receiving node combines the signals of multiple nodes according to different relative delays, the reception performance of the signals can be improved. At the same time, the cooperative node can also actively adjust the signal sending time to improve the reception performance of the receiving node signal merging algorithm. LoRa modulation, by using DCoMP transmission, improves the reception of signals and thus the overall capacity of the system. Through the analysis of multipoint communication and single point communication, this paper is of great help to LoRa network deployment.

Progress and Prospects for Estonian Libraries

2011 ◽  
pp. 221-237 ◽  
Author(s):  
Sirje Virkus
Keyword(s):  
Information And Communication Technologies ◽  
Information And Communication Technology ◽  
Communication Technology ◽  
Rapid Development ◽  
Communication Technologies ◽  
Library Services ◽  
The Past ◽  
Challenges And Opportunities ◽  
Information And Communication ◽  
New Challenges

The rapid development of information and communication technology (ICT) over the past decades has created new challenges and opportunities for libraries and librarians. As a result of ICT, library services to users have changed, the management of libraries has evolved and the roles of librarians have multiplied. The new millennium presents new opportunities to exploit an ever-growing array of information and communication technologies in the provision of library services. As one millennium draws to a close and a new one begins, there are a lot of questions to answer:

scholarly journals Virtuality Changes Consumer Preference: The Effect of Transaction Virtuality as Psychological Distance on Consumer Purchase Behavior

2019 ◽  
Vol 11 (23) ◽  
pp. 6618 ◽  
Author(s):  
Park
Keyword(s):  
Information And Communication Technology ◽  
Communication Technology ◽  
Rapid Development ◽  
Consumer Preference ◽  
Psychological Distance ◽  
Purchase Behavior ◽  
Purchasing Behavior ◽  
Virtual Currency ◽  
Information And Communication ◽  
Digital Money

With the rapid development of information and communication technology, a variety of new industries and services are rapidly evolving based on the convergence between existing Information and Communication Technology (ICT) and heterogeneous industries. In the meantime, the FinTech market, created by the convergence of financial and ICT areas, is emerging and growing rapidly. The new market of virtual transaction based on digital money is growing faster than any other FinTech area. The purpose of this study is to determine whether the perceived difference in the virtuality of a consumer’s transaction affects the consumer's purchasing behavior and how the behavior changes. Specifically, this study revealed that consumers' perceived virtuality differs according to the type of transaction method. Consumers felt that the money was more virtual when they had digital (virtual) currency for a service than when they had cash. This virtuality of money controls the psychological distance of the consumer's money, which is closer to cash than virtual currency. This difference in psychological distance affects consumers' information processing, such that when psychological distances are far (vs. close), consumers prefer products that are described as abstract (vs. concrete), and have a more favorable attitude toward products with more variety.

Distal radical migration strategy: an emerging synthetic means

2018 ◽  
Vol 47 (3) ◽  
pp. 654-667 ◽  
Author(s):  
Weipeng Li ◽  
Wentao Xu ◽  
Jin Xie ◽  
Shouyun Yu ◽  
Chengjian Zhu
Keyword(s):  
Rapid Development ◽  
Long Distance ◽  
Migration Strategy ◽  
Bond Functionalization ◽  
The Past ◽  
Radical Migration

In the past three years, we have witnessed the rapid development of C–C and C–H bond functionalization by means of long-distance radical migration events which bring us a new platform to deal with the challenging C–C and C–H bond functionalization.

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