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Pakistani Media on Xinjiang: Development and Opportunities
Maoxia Jiang,Chunxue Yang,Heng Wu 아시아사회과학학회 2023 Jornal of Asia Social Science Vol.10 No.3
With the acceleration of globalization, the Xinjiang Uygur Autonomous Region has increasingly garnered substantial attention from the international community in recent years due to its strategic location and multiculturalism. Foreign media have been actively disseminating reports in various areas in Xinjiang, such as politics, society and economy. Among which Western media reports are often inconsistent with the actual situation. But Pakistani media often exhibit their capacity for independent thought and objective analysis. They neither blindly adhere to the viewpoints of other nations nor allow themselves to be prejudiced by the cordial China-Pakistani relations. While Pakistani media endeavor to maintain a neutral stance, aspiring to explore these subjects concerning Xinjiang in a more balanced and rational manner that transcends simplistic expressions of support or opposition. There are reasons to believe that Pakistani media bring to the international community authentic, colorful, and fascinating coverage of Xinjiang, which not only enhance people's understanding of Xinjiang but also help to build a bridge of cultural communication and to promote exchanges and cooperation between Xinjiang and the world. It is believed that there will be more and more media and countries to gain a deeper understanding of Xinjiang and engage in more extensive exchanges and cooperation with the region in the future to promote harmony, development, and prosperity here.
Analysis and Design of a Separate Sampling Adaptive PID Algorithm for Digital DC-DC Converters
Changyuan Chang,Xin Zhao,Chunxue Xu,Yuanye Li,Cheng`en Wu 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.6
Based on the conventional PID algorithm and the adaptive PID (AD-PID) algorithm, a separate sampling adaptive PID (SSA-PID) algorithm is proposed to improve the transient response of digitally controlled DC-DC converters. The SSA-PID algorithm, which can be divided into an oversampled adaptive P (AD-P) control and an adaptive ID (AD-ID) control, adopts a higher sampling frequency for AD-P control and a conventional sampling frequency for AD-ID control. In addition, it can also adaptively adjust the PID parameters (i.e. Kp, Ki and Kd) based on the system state. Simulation results show that the proposed algorithm has better line transient and load transient responses than the conventional PID and AD-PID algorithms. Compared with the conventional PID and AD-PID algorithms, the experimental results based on a FPGA indicate that the recovery time of the SSA-PID algorithm is reduced by 80% and 67% separately, and that overshoot is decreased by 33% and 12% for a 700㎃ load step. Moreover, the SSA-PID algorithm can achieve zero overshoot during startup.
Influence of compressor’s tilt angle on the performance of miniature refrigeration system
Xia Chen,Yuting Wu,Chongfang Ma,Chunxu Du,Rui Ma,Dongfang Wang 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.1
Vapor compression refrigeration is considered as ideal miniature cooling system for miniature electronic systems and portable cooling systems. Many applications of the miniature refrigeration system are working under the situations (such as aviation field, individual combat system and automobile air conditioning, etc.) that exist bump, tilt, and even flip, which will severely degrade the performance of the miniature refrigeration system. In order to study the influence of compressor’s tilt angle on refrigeration system, a test bench was built and the performance experiments were made. The results show that the compressor’s tilt angle has a great impact on the refrigeration system performance. When the compressor worked at the maximum tilt angle of 60°, COP-c and COP-h of the system change periodically. When the compressor works in full load, the maximum tilt angle for compressor is 20°. When the compressor tilt angle is 15°, there is an optimal amount of refrigerant charge, and corresponding COP-c and COP-h reach the maximum of 2.9 and 3.9, respectively.
Analysis and Design of a Separate Sampling Adaptive PID Algorithm for Digital DC-DC Converters
Chang, Changyuan,Zhao, Xin,Xu, Chunxue,Li, Yuanye,Wu, Cheng'en The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.6
Based on the conventional PID algorithm and the adaptive PID (AD-PID) algorithm, a separate sampling adaptive PID (SSA-PID) algorithm is proposed to improve the transient response of digitally controlled DC-DC converters. The SSA-PID algorithm, which can be divided into an oversampled adaptive P (AD-P) control and an adaptive ID (AD-ID) control, adopts a higher sampling frequency for AD-P control and a conventional sampling frequency for AD-ID control. In addition, it can also adaptively adjust the PID parameters (i.e. $K_p$, $K_i$ and $K_d$) based on the system state. Simulation results show that the proposed algorithm has better line transient and load transient responses than the conventional PID and AD-PID algorithms. Compared with the conventional PID and AD-PID algorithms, the experimental results based on a FPGA indicate that the recovery time of the SSA-PID algorithm is reduced by 80% and 67% separately, and that overshoot is decreased by 33% and 12% for a 700mA load step. Moreover, the SSA-PID algorithm can achieve zero overshoot during startup.
Research in Distributed Evolution based on Real-time Collaboration Technology
Shanshan Wang,Liping Gao,Sizhen Zhu,Chunxue Wu 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.3
Evolution design takes the advantage of the evolution technology into the art design, and designers can achieve satisfactory products by performing evolutionary operations. It’s a powerful method in the procedure of the art design. However, the traditional evolution running on single site leads to the low efficiency and the less diversity. In addition, the products just represent the aesthetics of the single site. Based on these problems, this paper aims at using distributed evolution technology to complete the collaborative evolution, broadcasting evolutionary operations among distributed sites and executing evolutionary operations on each site. Then, the acquired products could represent the aesthetics of most sites due to its rich diversity. The paper mainly solves the problems of the operation conflicts which come from different sites, builds a new hybrid document model designs several algorithms based on Operation Transformation (OT) to solve the conflicts, and describes the procedure of the consistency maintenance. The proposed solution has been theoretically verified for its correctness in hybrid model.