Ziqi Li

Northwestern Polytechnical University

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King Wai Chiu Lai

City University of Hong Kong

Xiaoyang Zou

City University of Hong Kong

Jiaqi Xue

City University of Hong Kong

Sudhir K. Sastry

The Ohio State University

Ke Yang

Anhui University of Science and Technology

Chunxiu Xu

Hanshan Normal University

Justin Massey

University of Michigan–Ann Arbor

Pei Dai

Xidian University

Robert P. Dickson

University of Michigan–Ann Arbor

Colin Pak Yu Chan

City University of Hong Kong

Cooperative Institutions

University of Michigan–Ann Arbor

University of Science and Technology Beijing

City University of Hong Kong

Ann Arbor Center for Independent Living

Hanshan Normal University

Northwestern Polytechnical University

Michigan Medicine

Hefei University of Technology

Wuhan University of Technology

Chinese Academy of Sciences

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Rapid breath analysis for acute respiratory distress syndrome diagnostics using a portable two-dimensional gas chromatography device

Analytical and Bioanalytical Chemistry (2019)

Menglian Zhou Ruchi Sharma Hongbo Zhu Ziqi Li Jiliang Li

Breath gas analysis

10.1007/s00216-019-02024-5

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Citations (54)

Distance readout of Al content with naked eyes on a cotton thread

AIP Advances (2018)

Chunxiu Xu Wanjie Huang Shunying Zhu Ziqi Li Longfei Cai

We described a facile method for distance-based detection of aluminum on a thread based on the adsorption of formed complex onto thread. Chrome azurol S (CAS) containing Cetyltrimethylammonium Bromide (CTMAB) were used as chromogenic reagent, which reacts with aluminum to form AL-CAS-CTMAB complex on a thread. The complex was adsorbed onto thread to generate a colored band. Aluminum contents could be quantified by measuring the length of colored band on the thread using a ruler, thereby eliminating the need for electronic readout devices and trained personnel. This instrument-free method has features of low cost, easy to operation, fast analysis speed, disposability and low reagents/sample consumption. Moreover, considering that the thread fiber has adsorption capability to various molecules such as metal-ligand complexes and biomolecules, we believe that this technique holds the potentials to be widely adaptable to distance-based chemical and biochemical analysis.

Chromogenic

Naked eye

Biomolecule

Colored

10.1063/1.5052525

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Citations (6)

Buckling Behavior Analysis of Kirigami Structure Under Tension

Micromachines (2024)

Pei Dai Ziqi Li Xiaoyang Zhang Yue Zhu-feng

Flexible electronic technology has attracted great interest, where rigid and brittle semiconductor materials can withstand large deformation. In order to improve the stretchability of devices, many novel structures have been designed, such as the classical "wavy" structure, the island-bridge structure, and origami structures that achieve stretchability through creases. However, the stretchability of these structures is still not large enough. Inspired by traditional kirigami, the stretchability of devices is achieved by making various periodic cuts in the substrate while the devices are placed in the area around the cuts. The previous research mainly focused on the change in the electrical properties of the structure during the deformation process, and there were few studies on the mechanical mechanisms. Therefore, this paper studies the buckling behavior of the kirigami structure when the substrate is stretched, and its mechanism can provide guidance for practical applications.

Tension (geology)

10.3390/mi15111398

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High-Fidelity sEMG Signals Recorded by an on-Skin Electrode Based on AgNWs for Hand Gesture Classification Using Machine Learning

ACS Applied Materials & Interfaces (2023)

Xiaoyang Zou Jiaqi Xue Xiaoting Li Colin Pak Yu Chan Ziqi Li

The human forearm is one of the most densely distributed parts of the human body, with the most irregular spatial distribution of muscles. A number of specific forearm muscles control hand motions. Acquiring high-fidelity sEMG signals from human forearm muscles is vital for human-machine interface (HMI) applications based on gesture recognition. Currently, the most commonly used commercial electrodes for detecting sEMG or other electrophysiological signals have a rigid nature without stretchability and cannot maintain conformal contact with the human skin during deformation, and the adhesive hydrogel used in them to reduce skin-electrode impedance may shrink and cause skin inflammation after long-term use. Therefore, developing elastic electrodes with stretchability and biocompatibility for sEMG signal recording is essential for developing HMI. Here, we fabricated a nanocomposite hybrid on-skin electrode by infiltrating silver nanowires (AgNWs), a one-dimensional (1D) nano metal material with conductivity, into polydimethylsiloxane (PDMS), a silicone elastomer with a similar Young's modulus to that of the human skin. The AgNW on-skin electrode has a thickness of 300 μm and low sheet resistance of 0.481 ± 0.014 Ω/sq and can withstand the mechanical strain of up to 54% and maintain a sheet resistance lower than 1 Ω/sq after 1000 dynamic strain cycles. The AgNW on-skin electrode can record high signal-to-noise ratio (SNR) sEMG signals from forearm muscles and can reflect various force levels of muscles by sEMG signals. Besides, four typical hand gestures were recognized by the multichannel AgNW on-skin electrodes with a recognition accuracy of 92.3% using machine learning method. The AgNW on-skin electrode proposed in this study has great potential and promise in various HMI applications that employ sEMG signals as control signals.

Human skin

Polydimethylsiloxane

Electronic Skin

SIGNAL (programming language)

10.1021/acsami.2c21354

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Citations (9)

A systematic approach in remanufacturing for high efficiency and low cost: The selective parallel disassembly sequence planning

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture (2021)

Lei Zhang Yuanfeng Wu Ziqi Li Yu Zheng Yongqiang Ren

With the growth of environmental awareness, remanufacturing and sustainable manufacturing have become hot issues. Disassembly is the first step and critical activity in remanufacturing. Traditional disassembly sequence planning (DSP) focusses on sequential disassembly. However, it is inefficient for complicated products because only one manipulator is employed to execute disassembly operations. Thus, this work focusses on parallel DSP (PDSP) and proposes a selective parallel disassembly sequence planning (SPDSP) methodology, which performs disassembly compared to sequential DSP and PDSP. In this paper, a mathematical model is used to describe the constraint and precedence relationships, and a parallel sequence model is designed for parallel disassembly. A novel hybrid genetic algorithm (NHGA) based-multi-objective model of SPDSP is proposed for optimisation. In this model, two indicators are integrated: disassembly time (including basic disassembly time, tool exchange time and direction change time) and disassembly costs. A transmission box is used as an instance, and a comparison with conventional genetic algorithm (GA), simulated annealing (SA) and tabu search (TS) is made to validate the practicality of the proposed methodology.

Remanufacturing

Sequence (biology)

Cellular manufacturing

10.1177/09544054211041036

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Citations (9)

A 9.45-ENOB 3.84-MS/s Ping-Pong Interleaving SAR ADC with Integrated Buffers and SPI for 96-Channel Neural Signal Acquisition

2022 IEEE International Symposium on Circuits and Systems (ISCAS) (2024)

Ziqi Li Xinyue Gu Hongming Lyu

Successive approximation ADC

Interleaving

Ping pong

SIGNAL (programming language)

10.1109/iscas58744.2024.10557883

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Citations (0)

Iron-Enriched Kale Treated With Moderate Electric Field Processing Better Delivers Digested Iron to Caco-2 Cells as Compared to Iron Sulfate

Current Developments in Nutrition (2024)

Ziqi Li Jin Hong Mok Sudhir K. Sastry Rachel E. Kopec

Iron sulfate

Caco-2

10.1016/j.cdnut.2024.103742

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Study on Crack Propagation Rate Model of Ni-Cr-MoV Marine High-Strength Steel Considering Load Ratio Effect

Lecture notes in civil engineering (2023)

Jiankang Lei Jingxia Yue Ke Yang Yuxuan Xia Hongrui Liu

10.1007/978-981-99-4291-6_60

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Ultrasensitive Detecting the Formaldehyde Level of Environment by Assembly and Cu2 -Assisted 2', 7'-DCF@AHMT Complex Stepwise Strategy

Lala Hou Xiaohui Hao Mengwen Li Ao Shen Ziqi Li

Ultrasensitive detection of toxic target molecules formaldehyde (FA) is highly desirable for monitoring environmental pollution and improving human safety. In this work, we explored an ultra-sensitivity detecting assay for FA by assembly of 2', 7'-DCF@AHMT and the Cu2+-assisted stepwise fluorescent approaches based on the redox mechanism of Cu2+ and FA. 2', 7'-DCF@AHMT@Cu2+ exhibited a good linear relationship with FA in the range of 0-5 μM, the limit of detection (LOD) was lower to be 2 nM and the response time was 10 s. Moreover, a portable analysis test strip of 2', 7'-DCF@AHMT@Cu2+ for the point-of-care detection of FA was achieved with smartphone, and also had good detection effect on FA in environmental water samples.

10.2139/ssrn.4421916

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Post-Fire Seismic Property of Reinforced Concrete Frame Joints with Carbon Fiber-Reinforced Polymer Using Numerical Analysis

Fire (2023)

Jinyan Wang Xingchao Yue Fuli Li Yuzhou Sun Ziqi Li

This study investigated the post-fire seismic characteristics of reinforced concrete frame joints with carbon fiber-reinforced polymer (CFRP) under low-cycle reciprocating loads through numerical analysis. Finite element simulations were conducted to examine the hysteretic curve, skeleton curve, energy dissipation, and stress distribution of the reinforced joints. The findings revealed that, relative to unreinforced joints post-fire, the bearing capacity of the reinforced joints remained essentially unaltered during the elastic phase. However, their ultimate bearing capacity, energy dissipation capacity, and ductility exhibited varying degrees of enhancement. Interestingly, this augmentation did not persist as the number of reinforcement layers increased. The optimal reinforcing effect was observed with the application of two reinforcement layers, resulting in a 30.3% increase in ultimate bearing capacity and a 26.5% improvement in energy dissipation capacity. Moreover, as the axial compression ratio increased, the high-stress zones within the joint expanded, and the failure mode transitioned from plastic damage at the beam end of the joint under low axial compression ratios to column crushing failure under high axial compression ratios.

Ductility (Earth science)

10.3390/fire6050205

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