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Science China Chemistry 2025年

作者： Lei Gu Xing Li Chao wu y.ng Feng Chunming y.ng Lin Song Frontiers Science Center for Flexible Electronics Institute of Flexible Electronics Northwestern Polytechnical University Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Inverted perovskite solar cells （PSCs） have received great attention owing to the high certificated power conversion efficiency（PCE） reaching 26.7%. However, interfacial charge recombination is far superior to perovskite bulk charge recombination due to the use of fullerenes and their derivatives in inverted perovskite solar cells, which induces devastating open circuit voltage（VOC） losses. For this reason the present work attempts to use 4-chloropiperidine hydrochloride for the upper surface modification of perovskite to construct a quasi-two-dimensional （2D） structure with suitable 2D layer widths （n=2, 3 dominant）,which has a smaller electron carrier transport barrier without sacrificing short-circuit current （JSC） in the device. This strategy effectively passivates the interfacial defect states while promoting energy level alignment to achieve carrier dissociation and equilibrium transport at the interface, which in turn resulted in improved fill factor （FF）. In addition, additional energy levels are provided by 2D perovskites to collect hot carriers, resulting in improved device open circuit voltage （VOC）. As a result, the device PCE increases from 22.37%to 24.11%after the 4CPD treatment. In addition, the 4CPD-treated PSCs maintain 90%of the initial PCE after storage in an N2atmosphere at 50°C for 1,080 h, whereas the control devices show a 15%PCE loss under the same aging conditions. This work provides new opportunities to suppress interfacial charge recombination in inverted devices.

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Analytical model of vertical vibrations in piles for different tip boundary conditions:parametric study and applications

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第2期14卷 79-93页

作者： ning WAng Kui-hua WAng Wen-bing wu MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Department of Civil EngineeringZhejiang University Engineering Faculty China University of Geoscience

In this paper,a model named fictitious soil pile was introduced to solve the boundary coupled problem at the pile *** the model,the soil column between pile tip and bedrock was treated as a fictitious pile,which has the same properties as the local *** tip of the fictitious soil pile was assumed to rest on a rigid rock and no tip movement was *** combination with the plane strain theory,the analytical solutions of vertical vibration response of piles in a frequency domain and the corresponding semi-analytical solutions in a time domain were obtained using the Laplace transforms and inverse Fourier transforms.A parametric study of pile response at the pile tip and head showed that the thickness and layering of the stratum between pile tip and bedrock have a significant influence on the complex ***,two applications of the analytical model were *** is to identify the defects of the pile shaft,in which the proposed model was proved to be accurate to identify the location as well as the length of pile *** application of the model is to identify the sediment thickness under the pile *** results showed that the sediment can lead to the decrease of the pile stiffness and increase of the damping,especially when the pile is under a low frequency load.

关键词： Soil-pile interaction Complex impedance Pile tip Vertical vibration Sediment

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Lipid scrambling in immunology:why it is important

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Cellular & Molecular Immunology 2023年第9期20卷 1081-1083页

作者： ning wu AndréVeillette The First Affiliated Hospital of Anhui Medical University Clinical Immunology InstituteAnhui Medical UniversityHefeiAnhuiChina Laboratory of Molecular Oncology Institut de recherches cliniques de Montréal(IRCM)MontréalQC H2W1R7Canada Department of Medicine University of MontréalMontréalQC H3T 1J4Canada Department of Medicine McGill UniversityMontréalQC H3G 1Y6Canada

Asymmetric lipid distribution in the plasma membrane(PM)is one of the fundamental features of living *** not only serve as structural components of the biophysical structure of the PM that preserves cell integrity but also participate directly in *** phospholipids(PLs),such as phosphatidylserine(PS),phosphatidylethanolamine(PE),and phosphoinositol(PI),are preferentially located in the inner layer of the PM,creating electrostatic charges for the docking of membrane-associated and cytoplasmic proteins carry.ng polybasic stretches of amino ***,there is emerging evidence that reversible changes in the distribution of these lipids take place in the PM and that these changes are critical for normal cell signaling,functions and homeostasis[1–3].They can also be implicated in the genesis of pathologies.

关键词： electrostatic reversible distribution

Distributed intrusion detection for mobile ad hoc networks

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Journal of Systems Engineering and Electronics 2008年第4期19卷 851-859页

作者： yi Ping Jiang Xinghao wu yue Liu ning School of Information Security Engineering Shanghai Jiaotong Univ Shanghai 200030 P. R. China State Key Lab of Information Security Graduate School of Chinese Academy of Sciences Beijing 100039 P. R. China

Mobile ad hoc networking （MANET） has become an exciting and important technology in recent years, because of the rapid proliferation of wireless devices. Mobile ad hoc networks is highly vulnerable to attacks due to the open medium, dynamically changing network topology, cooperative algorithms, and lack of centralized monitoring and management point. The traditional way of protecting networks with firewalls and encryption software is no longer sufficient and effective for those features. A distributed intrusion detection approach based on timed automata is given. A cluster-based detection scheme is presented, where periodically a node is elected as the monitor node for a cluster. These monitor nodes can not only make local intrusion detection decisions, but also cooperatively take part in global intrusion detection. And then the timed automata is constructed by the way of manually abstracting the correct behaviours of the node according to the routing protocol of dynamic source routing （DSR）. The monitor nodes can verify the behaviour of every nodes by timed automata, and validly detect real-time attacks without signatures of intrusion or trained data. Compared with the architecture where each node is its own IDS agent, the approach is much more efficient while maintaining the same level of effectiveness. Finally, the intrusion detection method is evaluated through simulation experiments.

关键词： mobile ad hoc networks routing protocol security intrusion detection timed automata.

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Modeling tactile perceived intensity for vibration from a coin eccentric rotating mass motor

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Science China Technological Sciences 2025年

作者： yun FAng Jingchen HUAng yujun wu Jiaqi DOng Weichao GUO Xinjun SHEng State Key Laboratory of Mechanical System and Vibration School of Mechanical Engineering Shanghai Jiao Tong University Meta Robotics Institute Shanghai Jiao Tong University

Establishing the relationship between vibrotactile parameters and perceived intensity（PI） is of great significance in the regulation of desired sensations, which contribute to haptic interfaces in practical applications. Coin eccentric rotating mass（ERM） motors are routinely utilized due to their lightweight design and efficient ability to evoke strong tactile sensations. By adjusting input voltages, ERMs can yield different stimuli, but the effects of their physical properties on PI remain ***, we developed the physical model of the ERM-skin system and optimized the parameters affecting PI. Moreover, the relationship between stimulus and perception was derived based on Fechner?s law. Three experiments were conducted on fifteen subjects（ten males and five females, aged 24.40 ± 2.87 years） to identify the vibration parameters and corresponding PI to verify the proposed PI model. ERMs in this study were attached to phantom skin/forearm with slim adhesive tape to minimize the interference. Experiment 1 performed vibration calibration with ERM attached to the skin phantom to simulate the actual configuration. Then, the relative and absolute PI of subjects on specific stimuli were acquired in Experiments 2 and *** fitting reliability of the proposed PI model was evaluated on fifteen subjects with R2of 0.73 ± 0.07 and root mean squared error（RMSE） of 1.35 ± 0.28. Overall, the proposed PI model established the quantitative relationship between stimulus parameters（vibration parameters and physical parameters） and subjective PI, which provided theoretical support for ERM optimization and vibrotactile modulation.

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Steering and braking game control architecture based minimax robust stability control for emergency avoidance of autonomous vehicles

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Science China(Technological Sciences) 2022年第4期65卷 943-955页

作者： wu Jian wu DeXi yAN y.ng ZHAng ning BAO ChunJiang WAng FengBo School of Mechanical and Automotive Engineering Liaocheng UniversityLiaocheng 252000China School of Mechanical Engineering Southeast UniversityNanjing 211189China

The existing electronic stability control(ESC)system does not consider the steering intention of an autonomous driving system(ADS)during autonomous driving emergency *** distributed control scheme between ESC and ADS does not involve any information interaction,and the balance between path tracking and lateral stability is not optimal.A Nash game control scheme of steering and braking system is proposed to ensure that both path tracking and stability are simultaneously in the loop and solve the conflict by simulating the interaction between the two agents considering the impact on the interaction between a path following and lateral *** agent considers its interests and the opponent’s interest,resulting in a global optimal control solution of steering control and ***,using minimax optimization theory,a lateral stability strategy is proposed to make the game control architecture under emergency avoidance more robust to uncertain lateral ***,simulation and hardware in the loop experiments show that the proposed scheme can consider both vehicle’s path following performance and lateral stability in the event of an emergency.

关键词： game framework emergency avoidance steering intention stability minimax theory

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Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes: accessing β-chiral sulfones bearing S-stereocentric cyclic sulfinamides

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Science China Chemistry 2025年第01期 257-263页

作者： Jiapian Huang Chenxin Wang Xu Wang Xiaoyu Zhou Wei Xiao Jie wu School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies Taizhou University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering Henan Normal University

The generation of various β-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is described. This method features a broad substrate scope and excellent stereospecificity. Computational studies reveal that the dispersion interaction between sulfinyl group and CH2SO2Ph group plays a crucial role in the stereoselectivity control.

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Breaking the structural symmetry of active sites in zeolite imidazolate framework for enhanced CO2 photoreduction

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Science China Chemistry 2025年

作者： yupeng Han yayu yan Qiaohong Li Xin wu Fei Wang Jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences College of Chemistry Fuzhou University

Adjusting the structure and composition of active sites is a highly effective method for activating linear ***, precise control of interfacial chemistry within molecular-scale environments presents a significant challenge in heterogeneous catalysis. In our study, we present symmetry-broken Mo-O-Co triple-atom active sites within the hybrid zeolite imidazole framework HZIF-CoMo. These sites disrupt the electronic balance and create a weak built-in electric field, thus promoting photocatalytic CO2reduction. The CO yield over HZIF-CoMo is improved to 3.1 mmol g-1h-1, which is over four times higher than the parent cobalt-imidazole framework MAF-6-Co. Both experimental and theoretical studies indicate that electronic modulation through the symmetry-breaking Mo-O-Co moiety acts as an organizing knob to accelerate charge separation and result in more carriers participating in the catalytic reaction. This work provides important insights into optimizing site-related electronic structures for targeted photocatalytic reactions.

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Smart windows with high optical transparency and structural color

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Science China Chemistry 2025年

作者： youtong wu Xueting Li yiwen Li Hao Wang yuqi Zhang Xihua Lu College of Chemistry and Chemical Engineering Donghua University Fujian Nano-Micro Advanced Materials Sci.& Tech.Co.Ltd. Jinjiang Innovation Entrepreneurship and Creativity Park Shanghai Evanston Advanced Materials Sci.& Tech.Co.Ltd.

In recent years, thermochromic smart windows have played an important role in enhancing energy efficiency and contributing to carbon neutrality in building energy consumption. However, thermal-shielding smart windows with high visible light modulation and structural colors are rarely reported. This study focuses on the development of thermochromic smart windows utilizing poly（N-isopropylacrylamide）(PNIPAm)-based nanogels, which exhibit dynamic solar modulation and high visible light transmission without additional energy input. Unlike traditional electrochromic materials such as tungsten trioxide, these smart windows achieve structural color states through the self-assembly of nanogels, eliminating the need for inorganic materials. The fabricated hydrogel contains thermo-responsive poly（N-isopropylacrylamide-random-acrylic acid-random-N-tert-butyl acrylamide）P（NIPAm-r-AA-r-TBA）(PNTA) nanogels with tunable phase transition temperatures（Tp） that align with ambient *** smart windows demonstrate excellent stability over 100 heating-cooling cycles and significant temperature regulation,achieving an indoor temperature modulation of 10 °C and energy savings of 14.24 KJ m-3compared with normal windows. The production process is simple and scalable, making it feasible for industrial applications. Furthermore, these smart windows offer additional functionalities such as information encryption, adding value to their practical application.

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[Determination of eight phthalate metabolites in urine of pregnant women and evaluation of neonatal birth outcomes based on solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry]

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Se pu = Chinese journal of chromatography 2025年第1期43卷 60-67页

作者： Zi-Hao Wang Meng-Fei Xu Bei-Ni Li Ping wu Wei wu Hubei University of Chinese Medicine Wuhan 430065 China.

Phthalates (PAEs) are endocrine-disrupting chemicals that are widely present in everyday life and enter the human body through various pathways. The release of PAEs into the environment through pathways that include leaching, evaporation, abrasion, and the use of personal care products exposes humans to PAEs via ingestion, inhalation, and dermal absorption. Pregnant women, as a particularly vulnerable population, risk adverse newborn growth and development when exposed to PAEs. While the concentrations of PAEs in urine reflect recent exposure levels in humans, urinary levels of phthalate metabolites (mPAEs) are commonly used as biomarkers of internal exposure owing to the relatively short biological half-lives of PAEs (y, we developed a solid-phase extraction-high performance liquid chromatography-tandem mass spectrometry (SPE-HPLC-MS/MS) method for simultaneously detecting eight mPAEs in the urine of pregnant women. Urine samples were enzymatically hydrolyzed with -glucosidase and then purified using the Bond Elut Plexa SPE column, with subsequent elution, concentration, and redissolved performed prior to HPLC-MS/MS. Separation was achieved using an Agilent Eclipse Plus C18 column (100 mm×3 mm, 3.5 μm), with gradient elution performed using 0.1% acetic acid aqueous solution and 0.1% acetic acid acetonitrile as mobile phases. Multiple reaction monitoring (MRM) mode was used for detection, with quantification performed using the internal-standard method. Good linearities were obtained in the range of 0.1-200 ng/mL for the eight mPAEs, with limits of detection (LODs) and quantification (LOQs) of 0.015-0.048 and 0.050-0.160 ng/mL, respectively. The eight mPAEs exhibited recoveries of 80.2%-99.7% at three spiked levels (1, 10, and 50 ng/mL). This method was subsequently used to analyze the eight mPAEs levels in urine samples of 497 pregnant women from the Ezhou Maternity and Child Health Care Hospital. The participants exhibited widespread exposure t

关键词： birth outcomes high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) phthalate metabolites (mPAEs) urine samples of pregnant women