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Coupling metal-organic frameworks and wood-based carbon for water remediation

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Nano Research 2024年第6期17卷 5661-5669页

作者： Akhter Zia Manish Neupane Aidan McGlone Rui He Ruikun Xin Yifeng Liu Qiangu Yan jinwu wang Ling Li Zhiyong Cai Pei Dong Yingchao Yang Department of Mechanical Engineering University of MaineOronoME 04469USA Department of Mechanical and Aerospace Engineering University of MissouriColumbiaMO 65211USA Department of Mechanical Engineering George Mason UniversityFairfaxVA 22030USA Department of Civil and Environmental Engineering Rice UniversityHoustonTX 77005USA Department of Materials Science and NanoEngineering Rice UniversityHoustonTX 77005USA Forest Products Laboratory USDAMadisonWI 53726USA School of Forestry Resources University of MaineOronoME 04469USA

Fresh and clean water is highly demanded throughout the world.To effectively address the need,nanomaterials enabled nanotechnology has been explored as a means of more efficient,reliable,and environmentally friendly approach towards water treatment practices.One concern in adopting nanomaterials is how to retrieve them from water body to avoid secondary contamination.In this work,the earth abundant and sustainable wood,e.g.,basswood,was selected and carbonized into porous carbon as host skeleton,and metal-organic frameworks(MOFs),e.g.,MOF-199 with extremely high surface area,were grown throughout all channels in the porous basswood carbon.Targeting the traditional organic pollutant,methyl orange(MO),the combination of MOFs and basswood carbon(MOFs@carbon)demonstrates a remarkable adsorption capacity,which is 243%and 454%higher than basswood carbon and MOF-199,respectively.Such an outstanding adsorption performance originates from that the positively charged carbon pulls MO molecules close to carbon surface,leading to a high MO molecule concentration,and then the concentration gradient drives the MO molecules to be stored inside MOFs,functioning like pockets.These findings highlight the potential application of coupled MOFs and biomass carbon in addressing water remediation.

关键词： metal-organic framework(MOF)-199 basswood carbon MOFs@carbon methyl orange

Noise-Tolerant ZNN-Based Data-Driven Iterative Learning Control for Discrete Nonaffine Nonlinear MIMO Repetitive Systems

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 344-361页

作者： Yunfeng Hu Chong Zhang Bo wang Jing Zhao Xun Gong jinwu Gao Hong Chen State Key Laboratory of Automotive Simulation and Control Jilin UniversityJilin UniversityChangchun 130025China College of Communication Engineering Jilin UniversityJilin UniversityChangchun 130025China Department of Electromechanical Engineering University of MacaoMacao 999078China School of Artificial Intelligence Jilin UniversityChangchun 130012China IEEE College of Electronics and Information Engineering Tongji UniversityShanghai 200092China

Aiming at the tracking problem of a class of discrete nonaffine nonlinear multi-input multi-output(MIMO) repetitive systems subjected to separable and nonseparable disturbances, a novel data-driven iterative learning control(ILC) scheme based on the zeroing neural networks(ZNNs) is proposed. First, the equivalent dynamic linearization data model is obtained by means of dynamic linearization technology, which exists theoretically in the iteration domain. Then, the iterative extended state observer(IESO) is developed to estimate the disturbance and the coupling between systems, and the decoupled dynamic linearization model is obtained for the purpose of controller synthesis. To solve the zero-seeking tracking problem with inherent tolerance of noise,an ILC based on noise-tolerant modified ZNN is proposed. The strict assumptions imposed on the initialization conditions of each iteration in the existing ILC methods can be absolutely removed with our method. In addition, theoretical analysis indicates that the modified ZNN can converge to the exact solution of the zero-seeking tracking problem. Finally, a generalized example and an application-oriented example are presented to verify the effectiveness and superiority of the proposed process.

关键词： Adaptive control control system synthesis data-driven iterative learning control neurocontroller nonlinear discrete time systems

Numerical simulation of aircraft arresting process with an efficient full-scale rigid-flexible coupling dynamic model

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Chinese Journal of Aeronautics 2024年第5期37卷 586-602页

作者： Haoyuan SHAO Daochun LI Zi KAN Lanxi BI Zhuoer YAO jinwu XIANG School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Tianmushan Laboratory Hangzhou 310023China

The arresting process of carrier-based aircraft is widely recognized as a challenging task,characterized by the highest accident rate among all carrier-based aircraft operations.Dynamic simulation plays a crucial role in assessing the intricate responses of the arresting process,favoring the design of carrier-based aircraft.An efficient and accurate rigid-flexible coupling model for analyzing the dynamic response of the arresting process is proposed.By combining the dynamic characteristics of airframe,landing gear,arresting hook and arresting gear system,the rigid-flexible coupling dynamic model is established to reflect the relative motion of the coupling parts and arresting load.The dynamic model is verified through simulations of landing gear landing drops and by comparing the arresting simulation results with corresponding data in the US military standard.Additionally,simulations of the arresting process under different off-center distance and aircraft yaw angle are conducted to obtain the dynamic response of the aircraft during the arresting process.The result indicates that the rigid-flexible coupling dynamic model proposed is effective for analyzing the arresting dynamics response of carrier-based aircraft.The axial force of the arresting cable on both sides of the hook engagement point,pitch and yaw angle of aircraft are inconsistent under yaw and off-center arresting.The analysis method and obtained results provide valuable references for assessing the dynamic responses of carrier-based aircraft during arresting process and offer valuable in-sights in the design of carrier-based aircraft.

关键词： Carrier-based aircraft Deck landing Rigid-flexible coupling dynamic model Finite element method Dynamic analysis

Effect of wall-disruption on nutrient composition and in vitro digestion of camellia and lotus bee pollens

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Food Science and Human Wellness 2024年第3期13卷 1567-1577页

作者： Yuan Yuan Shun Zhong Zeyuan Deng Guangyan Li jinwu Zhang Hongyan Li State Key Laboratory of Food Science and Resources Nanchang UniversityNanchang 330047China Nanchang Tongxin Zichao Biological Engineering Co. Ltd.Nanchang 330052China

The nutrient digestion,absorption and biological activity of bee pollen may be limited due to the complex pollen wall.Here,the effect of superfine grinding technology on the release of nutrients from bee pollen were investigated,and their antioxidant activities and in vitro digestion were explored in this study.Results showed that the content of nutrients in bee pollen increased after wall disruption.Among them,fat content increased by 22.55%-8.31%,protein content increased by 0.54%-4.91%,starch content increased by 36.31%-48.64%,soluble sugar content increased by 20.57%-29.67%,total phenolic acid content increased by 11.73%-86.98%and total flavonoids content increased by 14.29%-24.79%.At the same time,the antioxidant activity increased by 14.84%-46.00%.Furthermore,the active components such as phenolic compounds in the wall-disruption bee pollen were more readily to be released during the in vitro digestion,and easier to be absorbed because of their higher bioaccessibility.Antioxidant activities during in vitro digestion were also improved in walldisruption bee pollen.These findings provide evidence that bee pollen wall disruption was suggested,thus,it is more conducive to exerting the value of bee pollen in functional foods.

关键词： Bee pollen Nutrients Wall disruption Phenolic compounds In vitro digestion

Vibration analysis and topology optimization of the header of full-feeding rice combine harvester

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 96-108页

作者： Han Tang Changsu Xu Jianhua Zhu Rui Guan jinwu wang College of Engineering Northeast Agricultural UniversityHarbin 150030China School of Water Conservancy and Civil Engineering Northeast Agricultural UniversityHarbin 150030China

The header frame of full-feeding rice combine harvester was characterized by severe vibration due to the excitation force generated by the movement of each working part.In order to solve the problem,the parametric model of the header frame was established,and the accuracy of the finite element model was verified by comparison of the results of the free modal analysis and free vibration modal test based on Eigensystem Realization Algorithm(ERA).Then the constrained modal frequencies were calculated and compared with the external excitation source frequencies,the results showed that the first and eighth order modal natural frequencies were coupled with the excitation frequencies of the threshing cylinder and the engine respectively,which were apt to resonate.To avoid resonance and achieve lightweight design,topology optimization,and finite element analysis were carried out.The optimization results showed that the strength and rigidity meet the requirements and the weight was 14.17%lower than before.The first and eighth order modal natural frequencies were far away from the excitation frequencies range of the threshing cylinder and engine,and the frequencies were far away from the range of each excitation frequency,which effectively avoided the occurrence of resonance.Field experiments showed that the peak value of the vibration acceleration in the three directions of the 8 measuring points of the optimized header frame was significantly reduced,which effectively reduced the vibration of the header frame during harvest.This study provides a method for obtaining the vibration characteristics of key components of agricultural machinery and provides a reference for the weight and vibration reduction of header frames of rice,wheat,rape,and other crop combine harvesters.

关键词： eigensystem realization algorithm modal analysis free modal test topology optimization lightweight field experiment

Bimolecular reduction of carbon dioxide: double synthons for alkynes trifunctionalization

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Science China Chemistry 2024年第3期67卷 841-847页

作者： Wenfang Xiong Xiaobin Tan Hongjian Liu Baiyao Zhu jinwu Zhao Jianxiao Li Chaorong Qi Huanfeng Jiang School of Pharmacy Guangdong Medical UniversityDongguan 523808China Key Lab of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China

Carbon dioxide reduction, as a sustainable and versatile strategy for the access of chemical fuels, has attracted increasing attention and enormous efforts have been devoted to it in recent years. However, employing carbon dioxide as double synthons via bimolecular reduction remains challenging. Here, by leveraging the bimolecular reduction of carbon dioxide to carbonyl and methyl respectively, we describe a Pd-catalyzed trifunctionalization of alkynes with aryl iodide for the first time and showcase its advantages on the formation of various β-diketones and their application in the constructing of heterocyclic compounds with important biological activity, including pyrimidine, oxazole, pyrazole.

关键词： carbon dioxide bimolecular reduction trifunctionalization double synthons

Regulated macrophage immune microenvironment in 3D printed scaffolds for bone tumor postoperative treatment

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Bioactive Materials 2023年第1期19卷 474-485页

作者： Cuidi Li Changwei Li Zhenjiang Ma Hongfang Chen Huitong Ruan Lianfu Deng jinwu wang Wenguo Cui Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesShanghai Institute of Traumatology and OrthopaedicsRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025PR China Shanghai Key Laboratory of Orthopedic Implant Department of Orthopedic SurgeryShanghai Ninth People’s Hospital Affiliated Shanghai Jiao Tong University School of MedicineShanghai200011PR China

The 3D printing technique is suitable for patient-specific implant preparation for bone repair after bone tumor resection.However,improving the survival rate due to tumor recurrence remains a challenge for implants.The macrophage polarization induction to M2-type tumor-associated macrophages(TAMs)by the tumor microenvironment is a key factor of immunosuppression and tumor recurrence.In this study,a regenerative scaffold regulating the macrophage immune microenvironment and promoting bone regeneration in a dual-stage process for the postoperative treatment of bone tumors was constructed by binding a colony-stimulating factor 1 receptor(CSF-1R)inhibitor GW2580 onto in situ cosslinked hydroxybutylchitosan(HBC)/oxidized chondroitin sulfate(OCS)hydrogel layer covering a 3D printed calcium phosphate scaffold based on electrostatic interaction.The hydrogel layer on scaffold surface not only supplied abundant sulfonic acid groups for stable loading of the inhibitor,but also acted as the cover mask protecting the bone repair part from exposure to unhealthy growth factors in the microenvironment at the early treatment stage.With local prolonged release of inhibitor being realized via the functional material design,CSF-1R,the main pathway that induces polarization of TAMs,can be efficiently blocked,thus regulating the immunosuppressive microenvironment and inhibiting tumor development at a low therapeutic dose.At the later stage of treatment,calcium phosphate component of the scaffold can facilitate the repair of bone defects caused by tumor excision.In conclusion,the difunctional 3D printed bone repair scaffold regulating immune microenvironment in stages proposed a novel approach for bone tumor postoperative treatment.

关键词： 3D printing Drug delivery Microenvironment Macrophage polarization Bone regeneration

Optimization of the Gas Generator in Composite Power System with Tip-Jet Rotor

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Journal of Power and Energy Engineering 2024年第3期12卷 60-74页

作者： Jianxiang Tang Yifei Wu Yun wang jinwu Wu School of Aircraft Engineering Nanchang Hangkong University Nanchang China School of Intelligent Manufacturing Taizhou University Taizhou China

The key and bottleneck of research on the tip-jet rotor compound helicopter lies in the power system. Computational Fluid Dynamics (CFD) was used to numerically simulate the gas generator and rotor inner passage of the tip-jet rotor composite power system, studying the effects of intake mode, inner cavity structure, propellant components, and injection amount on the characteristics of the composite power system. The results show that when a single high-temperature exhaust gas enters, the gas generator outlet fluid is uneven and asymmetric;when two-way high-temperature exhaust gas enters, the outlet temperature of the gas generator with a tilted inlet is more uniform than that with a vertical inlet;adding an inner cavity improves the temperature and velocity distribution of the gas generator's internal flow field;increasing the energy of the propellant is beneficial for improving the available moment.

关键词： Tip-Jet Driven Rotor Composite Power System Gas Generator Optimization Hydrogen Peroxide Aerodynamic Characteristics Numerical Simulation

Bio-inspired, bio-degradable adenosine 5′ -diphosphate-modified hyaluronic acid coordinated hydrophobic undecanal-modified chitosan for hemostasis and wound healing

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Bioactive Materials 2022年第11期7卷 162-177页

作者： Yihao Liu Haoyi Niu Chengwei wang Xiaoxiao Yang Wentao Li Yuxin Zhang Xiaojun Ma Yuanjing Xu Pengfei Zheng jinwu wang Kerong Dai Shanghai Key Laboratory of Orthopedic Implant Department of Orthopedic SurgeryShanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineNo.639 Zhizaoju RdShanghai200011China Department of Orthopaedic Surgery Children’s Hospital of Nanjing Medical UniversityNo.72 Guangzhou RdNanjing210008China Department of Rehabilitation Huashan HospitalFudan UniversityNo.12 Middle Urumqi RdShanghai200040China Med-X Research Institute School of Biomedical EngineeringShanghai Jiao Tong UniversityNo.1956 Huashan RdShanghai200030China Department of Orthopedics Shanghai General HospitalShanghai Jiao Tong University School of MedicineNo.85 Wujin RdShanghai200080China

Uncontrolled hemorrhage and wound infection are crucial causes of trauma-associated death in both the military and the clinic. Therefore, developing an efficient and rapid hemostatic method with biocompatibility, easy degradation, and wound healing is of great importance and desirability. Inspired by spontaneous blood cell plug formation in the hemostasis process, an adenosine 5′-diphosphate modified pro-coagulation hyaluronic acid (HA-ADP) coordinated with enhanced antibacterial activity of undecanal-modified chitosan (UCS) was fabricated through physical electrostatic cross-linking and freeze-drying. The as-prepared hydrogel sponges showed a porous structure suitable for blood cell adhesion. In particular, the hydrogel exhibited excellent antibacterial ability and promoted the adhesion of platelets and red blood cells, thus inducing a prominent pro-coagulation ability via platelet activation, which exhibits a shorter hemostasis time (58.94% of control) in vitro. Compared with commercially available CELOX and gelatin sponge (GS), HA-ADP/UCS accelerates hemostasis and reduces blood loss in both rat tail amputation and rat artery injury models. Furthermore, all the samples exhibited su-perior cytocompatibility and biodegradability. Due to these performances, HA-ADP/UCS promoted full-thickness skin defect healing significantly in vivo. All the properties of HA-ADP/UCS suggest that it has great potential for translation as a clinical application material for hemostatic and wound healing.

关键词： Hemostasis Antibacterial Wound healing Hyaluronic acid Chitosan