Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) was originally founded in 1959. The publisher of the journal is Wuhan University of Technology. JWUT first got the scopus license in the year 2001. The journal generally publishes all aspect of engineering sciences like: physics, chemistry, mathematics, and all sorts of general engineering.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) (ISSN:2095-3844) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are in the following fields but not limited to: :
In this paper, a high isolation, 5-pole reconfigurable and adjustable diplexer based on a pseudo-combline structure is designed and simulated. For each channel operating at particular bands S (2 GHz) and L (3.5 GHz), For each channel operating at particular bands S (2 GHz) and L (3.5 GHz), the proposed diplexer contains two BPFs. We suggest using a T-shaped feed section to make BPF of each channel work at the intended frequencies and to raise the matching level between them. The tunability attribute of the proposed diplexer, which allows the two bands of the diplexer to be tuned to different frequencies, is obtained by using of vector diodes. A pin diode may be utilized as a switch in the feed section between two BPFs for reconfigurability as well. With insertion losses of 0.86 and 0.39 dB and return losses of 12.24 and 18.47 dB, respectively, the suggested diplexer is small (46.12*40.49) mm. Finally, compared to previous comparable research, the suggested diplexer exhibits the maximum isolation between TX and RX ports (more than 60 dB).
The integration of Ship Safety Score models into the Marine Weather Information System (MWIS) represents a crucial step towards enhancing maritime safety in Indonesian waters. This research delves into the utilization of Ship Safety Score models incorporating marine weather parameters and ship type specifications. Marine weather data was obtained from the Indonesian Meteorological Agency (BMKG), while ship technical information was extracted from the Automatic Identification System (AIS). The integration of Ship Safety Score models into MWIS demonstrated the ability to provide a more holistic understanding of factors influencing maritime safety. By visualizing Safety Score values, stakeholders can conduct more personalized and specific risk assessments, enabling informed decision-making to bolster national maritime safety. A SWOT analysis was conducted to identify the strengths, weaknesses, opportunities, and threats associated with this integration. The results highlighted the importance of Safety Score, integration into MWIS, specialized MWIS training, and MWIS accessibility in enhancing maritime safety. The integration of Safety Score models into MWIS provides a robust foundation for systematic safety risk evaluation and supports proactive decision-making to elevate national maritime safety in Indonesia.
Abrasive flow machining(AFM)is a nontraditional finishing process that is used to deburr, polish, radius and re- move recast layer by flowing a semisolid abrasive media across the workpiece surface. This paper introduced the AFM process mechanism, the factors that affect the AFM result, the application status and the machines of AFM, the achievements and present progress of AFM research, the combination of AFM and other technios. The main conclusions of AFM are given in this paper. Abrasive flow processing is referred to as AMF, also known as extrusion honing or grinding grain flow processing in China, which is a new technology of surface polishing and deburring of workpiece with liquid viscoelastic materials (composed of polymer support and abrasive). Abrasive flow processing was independently developed by two American companies in the 1960s and was originally used for deburr processing of complex alloy geometry in the aerospace field. Since then, it has been gradually promoted and applied to other industries.
In the actual production, many round tube parts with small aperture play an important role, but when it comes to polishing, finishing and other needs, because of its small diameter, complex structure, inconvenient location processing and other reasons, traditional processing methods are difficult to play a role. The abrasive flow machining technology not only has the fluidity of fluid abrasive but also can use abrasive particles for micro cutting. It has a unique advantage in solving these problems.
The growing need for the use of the internet and mobile services has increased the demand for the number of users for the mobile phone system without affecting the utilization of the available frequency spectrum. Specifically in urban areas, where the demand is higher. Code Division Multiple Access (CDMA) technology is considered the most efficient method for transmitting data across wireless networks, which enables the use of multiple users at the same time without increasing the frequency band. Based on the difference between the multi-stage multi- user CDMA and the standard multi-user CDMA, it was decided that there was a growing need to examine and compare the two systems. In this research, multi-stage multi-user CDMA is implemented and examined. In addition, the comparison between the standard multi-user CDMA technology and the multi-stage multi-user CDMA has been accrued between base stations and mobiles for the downlink. The efficiency of the system, the user number supported by the system, the bit error rate (BER), as well as the spreading factor, were the key parameters evaluated and examined. The two models are implemented utilizing MATLAB simulations. The results detected a tradeoff between the two models in terms of system efficiency and the number of users. Moreover, the multi-stage multi-user CDMA performs a significant improvement in spectral efficiency, interference reduction, user separation enhancement, and better BER. Therefore, based on the results, utilizing multi-stage multi-user CDMA technology introduces a significant advantage to the system.
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