Control Analysis for a Non-minimum Phase Static Unstably Missile

FAN Jun-fang,CHEN Ying,LIN Peng 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10

A novel control evaluation approach for tactical missile is detailed. The characteristics of non-minimum phase and static instability of a tail-controlled tactical missile are presented firstly. Then the frequency-domain controllable analysis is derived. Due to the limitations of traditional stability margins, the vector margin (VM) is introduced and compared with sensitivity function to show their essential relationship. A longitudinal three-loop autopilot is designed to stabilize the non-minimum phase static unstably missile dynamics and used as the baseline for all the tan available linear autopilot topologies given with the identical closed-loop characteristic equation and time-domain step response. Then vector margin method is adopted to compute and evaluate the stability of all available autopilots. The analysis and computation results show that the vector margin method could give better evaluation on system stability.

Impact-Angle-Constraint Look Angle Guidance for Miniature Missile

FAN Jun-fang,WANG Gang,CHEN Ying,DONG Si-yu 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10

An engagement dynamic model is set up for the miniature missile guidance solution under the constraints of field-of-view angle and terminal impact angle. The impact-angle constraint guidance law design is converted into an optimal control problem subjected to terminal constraints. Then a look angle guidance solution without line-of-sight rate is detailed to satisfy the requirement on field-of-view and impact angles. The relation between the required maximal look angle and the terminal impact angle is analyzed and formulated. The proposed method is simulated and validated. The results show that a miniature missile could intercept a stationary target with the required impact angle.

Control Capability

FAN Jun-fang,An Xiao-qian 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

The essential control characteristics for a two and three-loop acceleration autopilot of tactical missile were presented from a frequency analysis perspective. The basic limitation of right-half-phase pole and zero from airframe aerodynamics was analyzed using an open-loop crossover frequency inequality, which showed a consistent conclusion with the final overall stability condition in nature. To reveal the feedback control capability, the rate feedback, rate plus attitude feedback, and linear acceleration feedback, were calculated and simplified based on engineering requirement, respectively. Then an equivalent actuator dynamics were introduced to compute the stability condition at high frequency. Such that the global stability condition was obtained in explicit formulation. The results showed that the autopilot control capability is dominated by actuator bandwidth, and a compromise should be determined between the flight performance and the actuator requirement for a statically instable missile.

CO2 capture from flue gases using a fluidized bed reactor with limestone

Fan Fang,Zhen-shan Li,Ningsheng Cai 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.5

The CO2 capture from flue gases by a small fluidized bed reactor was experimentally investigated with limestone. The results showed that CO2 in flue gases could be captured by limestone with high efficiency, but the CO2 capture capacity of limestone decayed with the increasing of carbonation/calcination cycles. From a practical point of view, coal may be required to provide the heat for CaCO3 calcination, resulting in some potential effect on the sorbent capacity of CO2 capture. Experiment results indicated that the variation in the capacity of CO2 capture by using a limestone/coal ash mixture with a cyclic number was qualitatively similar to the variation of the capacity of CO2 capture using limestone only. Cyclic stability of limestone only undergoing the kinetically controlled stage in the carbonation process had negligible difference with that of the limestone undergoing both the kinetically controlled stage and the product layer diffusion controlled stage. Based on the experimental data, a model for the high-velocity fluidized bed carbonator that consists of a dense bed zone and a riser zone was developed. The model predicted that high CO2 capture efficiencies (>80%) were achievable for a range of reasonable operating conditions by the high-velocity fluidized bed carbonator in a continuous carbonation and calcination system.

Overseas Chinese Students’ Perceptions of the Influence of English on their Language and Culture

Fan (Gabriel) Fang,Lanxi Hu,Jennifer Jenkins 아시아영어교육학회 2017 The Journal of Asia TEFL Vol.14 No.1

The English language today functions as a lingua franca with the largest number of learners and users of any language. As an international language, it has attracted much attention in terms of its impacts on other languages. As another key language with the largest number of native speakers, the Chinese language has also demonstrated a global status, with an increasing number of language learners and users. This paper investigates Chinese overseas students’ perceptions of the influence of English on the Chinese language and culture. By adopting a series of qualitative interviews, this paper researches the attitudes of overseas Chinese students studying in the UK towards the influence of English on the Chinese language. In order to explore how the uses of English influence the Chinese language in the Chinese context, the paper investigates students’ attitudes towards the Gaokao reform, the influence of English on Chinese language and culture, and the future use of English in China. It concludes that, although the Chinese language is developing quite rapidly with both L1 and L2 speakers, English represents an important channel for people’s personal development, and English as a lingua franca will continue to be used for a range of purposes in many Chinese people’s lives for some time to come.

International Cultures in the Framework of World Englishes : What Should EFL Teachers Do?

Fan Fang 아시아영어교육학회 2011 The Journal of Asia TEFL Vol.8 No.1

A Hybrid Differentiator for Strapdown Guidance System

Fan Jun-fang,SU Zhong,LI Qing,Wang Jiang 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10

A strapdown guidance system for low-cost precise guided munitions is presented using strapdown small field-of-view (FOV) seeker and miniature inertial measurement unit (MIMU). The three-dimension line-of-sight (LOS) dynamics are described using the missile-target geometric transformation. Due to the weakness of strapdown seeker, a hybrid differentiator is then introduced to obtain and filter the inertial LOS rate for proportional guidance law. The analysis and trajectory simulation results verify the performance of the proposed algorithm.

PKM2 Regulates Hepatocellular Carcinoma Cell Epithelial-mesenchymal Transition and Migration upon EGFR Activation

Fan, Fang-Tian,Shen, Cun-Si,Tao, Li,Tian, Chao,Liu, Zhao-Guo,Zhu, Zhi-Jie,Liu, Yu-Ping,Pei, Chang-Song,Wu, Hong-Yan,Zhang, Lei,Wang, Ai-Yun,Zheng, Shi-Zhong,Huang, Shi-Le,Lu, Yin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.5

Pyruvate kinase isozyme type M2 (PKM2) was first found in hepatocellular carcinoma (HCC), and its expression has been thought to correlate with prognosis. A large number of studies have demonstrated that epithelial-mesenchymal transition (EMT) is a crucial event in hepatocellular carcinoma (HCC) and associated metastasis, resulting in enhanced malignancy of HCC. However, the roles of PKM2 in HCC EMT and metastasis remain largely unknown. The present study aimed to determine the effects of PKM2 in EGF-induced HCC EMT and elucidate the molecular mechanisms in vitro. Our results showed that EGF promoted EMT in HCC cell lines as evidenced by altered morphology, expression of EMT-associated markers, and enhanced invasion capacity. Furthermore, the present study also revealed that nuclear translocation of PKM2, which is regulated by the ERK pathway, regulated ${\beta}$-catenin-TCF/LEF-1 transcriptional activity and associated EMT in HCC cell lines. These discoveries provide evidence of novel roles of PKM2 in the progression of HCC and potential therapeutic target for advanced cases.

中国企業の多国籍化

方帆(FANG FAN) 전남대학교 글로벌디아스포라연구소 2009 전남대학교 세계한상문화연구단 국제학술회의 Vol.2009 No.1

The Chinese economy has been experiencing a revolution period in the 21st century. While high economic growth continues, China is having a surplus capital account combined with a huge trade surplus, resulting in enormous foreign currency savings. In addition, China’s joining into the World Trade Organization (WTO) in 2001 has attracted increasing inward foreign capital. At the same time, the multinationalization of Chinese corporations has reached a higher development stage. This study attempts to clarify the realities of the multinationalization of Chinese corporations and is divided into three sections. Section 1 entitled “The multinationalization of rapidly-growing corporations and the ‘ going out’ policy” analyzes the evolution of Chinese multinationalization in two stages, namely “From the economic open-door policy to the implementation of the ‘going out’ policy” during 1979-2000 and “The achievements of joining the WTO” from 2001 to the present. The two stages are distinguished by the increase of the total amount of foreign direct investment (FDI) and the establishment of foreign-invested corporations. The biggest feature in the background of the evolution of Chinese multinationalization is that FDI is considered as China’s national strategy. Moreover, by joining the WTO, Chinese corporations have had to face with severe competition from other foreign players in the domestic market, and have undergone corporate realignment through mergers and acquisitions (M&A) to expand the size of the companies. Section 2 entitled “The realities of multinationalization” analyzes the features, the circumstances, and the purpose of the multinationalization of Chinese corporations in recent years. The main features of the multinationalization of Chinese corporations are: small investment scale, the decentralization at the investment destination, the expansion of the investment fields, and the dominance of state-owned Chinese multinational corporations among other types of corporations. In recent years, Chinese investors tend to purchase foreign firms, especially small-and medium-sized multinational corporations, to obtain advanced technologies and the management skills. Finally, section 3 entitled “The promotion factors of multinationalization” verifies two factors that promote the multinationalization of Chinese corporations, which are China’s joining into the WTO and the support strategy of the Chinese government. The first factor is analyzed by examining the expansion of trade friction and the intensification of domestic competition after joining into the WTO. The second factor is clarified by the internal structure of financial support in addition to the general support policy of the government. In addition, the purpose of the government’s support strategy is also analyzed.

중국 고등교육 학술부패의 원인과 방지 대책

方浩范(Fang Hao-Fan) 새한철학회 2008 哲學論叢 Vol.1 No.51

이 논문은 중국 고등교육에 있어서 학술부패의 원인을 찾아보고, 그 방지대책을 모색하는 데에 그 목적이 있다. 중국에서 학술부패란 "학자나 학술단체가 학술활동 중에 고의적으로 학술도덕과 학술규범을 어긴 부도덕한 欺騙의 행위, 혹은 비이성적이고 비규범적인 행위"로 규정되며, 최근 한국에서 문제가 되는 연구윤리 분야에 해당한다. 중국에서 일어나는 가장 흔한 학술부패의 현상은 크게 두 가지로 유형화할 수 있다. 첫째 논문의 盜用이고, 둘째 연구과제 신청과 선정과정에서 생겨나는 부패현상이다. 그리고 이러한 학술부패가 발생하는 원인으로는 불합리한 학술 평가기준과 체제, 官·學 일체화와 學位 지상주의, 실리주의 사상, 불건전한 심리작용 등을 지적할 수 있다. 학술부패를 방지하기 위해서는 무엇보다도 먼저 정확한 연구평가 체제의 건립이 필요하다. 그리고 학술 誠信제도와 관리제도가 구축되어야 할 것이다. 그렇지만 연구자 개인의 도덕의식이 고양되지 않는 한 제도의 정립은 무의미하다. 이러한 점에서 윤리도덕교육이 강조될 수밖에 없다.