http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Ximei Zhu (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Dongxue Fu,Ximei Zhao,Jianguo Zhu 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.2
This paper proposes a novel robust super-twisting nonsingular fast terminal sliding mode control method for high precision position tracking of permanent magnet linear synchronous motor (PMLSM). Based on the position tracking error of PMLSM, a nonsingular fast terminal sliding mode variable is constructed to avoid the singularity and achieve the convergence of the position error in a finite time. To improve the convergence speed of the super-twisting algorithm and solve the gain overestimation problem of the existing algorithm, a dual-layer nested adaptive adjustment law based on the super-twisting scheme is proposed, which does not need the information of the unknown uncertainties. While ensuring that the conditions of the existence of the sliding mode hold, the control gain is made as small as possible to obtain a continuous switching control law to suppress the effect of the chattering phenomenon. The Lyapunov stability proves the robustness and convergence of the system. Experimental results confirm the effectiveness and feasibility of the designed position tracking control scheme.
-
ZIF-67 modified MXene/sepiolite composite membrane for oil–water separation and heavy metal removal
Qiuxiang Wang,Zongxue Yu,Ximei Zhu,Qingcan Xiang,Haidong Chen,Yao Pang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
In this study, polyvinylpyrrolidone (PVP) was used as a cross-linking agent leading to ZIF-67 in-situ growon the surface of sepiolite (Sep) to increase the specific surface area and space volume of Sep. Subsequently, a hydrothermal synthesis method was used to form a stable super-hydrophilic compositemembrane from the composite MXene by polydopamine. Compared to the MXene/PDA/Sep (MPS) compositemembrane, the composite membrane with ZIF-67 exhibited improved hydrophilicity and heavymetal separation. In addition, the introduction of negatively charged Sep@ZIF-67–24 (SZ-24) increasedthe number of adsorption active sites and negative potential for the surface of the membrane, and thiswas conducive to the demulsification and adsorption of oil–water emulsions. The MXene/PDA/Sep@ZIF-67–1 (MSZ-1) composite membrane had excellent separation effects on surfactant-stabilizedemulsions (SSEs) and surfactant-free emulsions (SFEs) oil–water emulsions which were above 99.4 %. Furthermore, the separation effect on oil–water, under extreme water conditions, was greater than99 %. The MSZ-1 composite membrane can achieve excellent separation of heavy metal ions, especiallyCu2+ that the rejection was 79.9 %, under high flux and extreme conditions. Therefore, the MSZ-1 compositemembrane has broad application prospects in oil–water treatment and heavy metal separation.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
