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Hollow Metal-Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion

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Nano-Micro Letters 2024年第9期16卷 161-179页

作者： Tian Mai Lei Chen pei‑lin wang Qi Liu Ming‑Guo Ma Research Center of Biomass Clean Utilization MOE Engineering Research Center of Forestry Biomass Materials and BioenergyBeijing Key Laboratory of Lignocellulosic ChemistryCollege of Materials Science and TechnologyBeijing Forestry UniversityBeijing 100083People’s Republic of China State Silica-Based Materials Laboratory of Anhui Province Bengbu 233000People’s Republic of China

With the continuous advancement of communication technology,the escalating demand for electromagnetic shielding interference(EMI)materials with multifunctional and wideband EMI performance has become *** the electrical and magnetic components and designing the EMI material structure have attracted extensive interest,but remain a huge ***,we reported the alternating electromagnetic structure composite films composed of hollow metal-organic frameworks/layered MXene/nanocellulose(HMN)by alternating vacuum-assisted filtration *** HMN composite films exhibit excellent EMI shielding effectiveness performance in the GHz frequency(66.8 dB at Kaband)and THz frequency(114.6 dB at 0.1-4.0 THz).Besides,the HMN composite films also exhibit a high reflection loss of 39.7 dB at 0.7 THz with an effective absorption bandwidth up to 2.1 ***,HMN composite films show remarkable photothermal conversion performance,which can reach 104.6℃under 2.0 Sun and 235.4℃under 0.8 W cm^(−2),*** unique micro-and macrostructural design structures will absorb more incident electromagnetic waves via interfacial polarization/multiple scattering and produce more heat energy via the local surface plasmon resonance *** features make the HMN composite film a promising candidate for advanced EMI devices for future 6G communication and the protection of electronic equipment in cold environments.

关键词： Metal-organic frameworks MXene Nanocellulose Electromagnetic shielding Photothermal conversion

Fast pulse sampling module for real-time neutron–gamma discrimination

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Nuclear Science and Techniques 2019年第5期30卷 130-137页

作者： Jia-Le Cai Dao-Wu Li pei-lin wang Zhi-Ming Zhang Xiao-Hui Li Bao-Tong Feng Ting-Ting Hu Teng Tong Wei Zhou Long Wei Beijing Engineering Research Center of Radiographic Techniques and Equipment Institute of High Energy PhysicsChinese Academy of Sciences School of Nuclear Science and Technology University of Chinese Academy of Sciences

An adaptable and compact fast pulse sampling module was developed for the neutron–gamma discrimination. The developed module is well suited for low-cost and low-power consumption applications. It is based on the Domino Ring Sampler 4(DRS4) chip, which offers fast sampling speeds up to 5.12 giga samples per second(GSPS) to digitize pulses from front-end detectors. The high-resolution GSPS data is useful for obtaining precise real-time neutron–gamma discrimination results directly in this module. In this study, we have implemented real-time data analysis in a field programmable gate array. Real-time data analysis involves two aspects: digital waveform integral and digital pulse shape discrimination(PSD). It can significantly reduce the system dead time and data rate processed offline. Plastic scintillators(EJ-299-33), which have proven capable of PSD, were adopted as neutron detectors in the experiments. A photomultiplier tube(PMT)(model #XP2020) was coupled to one end of a detector to collect the output light from it. The pulse output from the anode of the PMT was directly passed onto the fast sampling module. The fast pulse sampling module was operated at 1 GSPS and 2 GSPS in these experiments, and the AmBe-241 source was used to examine the neutron–gamma discrimination quality. The PSD results with different sampling rates and energy thresholds were evaluated. The figure of merit(FOM) was used to describe the neutron–gamma discrimination quality. The best FOM value of 0.91 was obtained at 2 GSPS and 1 GSPS sampling rates with an energy threshold of 1.5 MeV_(ee)(electron equivalent).

关键词： Real time Neutron–gamma discrimination Domino Ring Sampler 4 Plastic scintillators

Remaining Life Prediction Method for Photovoltaic Modules Based on Two-Stage Wiener Process

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Energy Engineering 2025年第1期122卷 331-347页

作者： Jie lin Hongchi Shen Tingting pei Yan Wu School of Electrical Engineering and Information Engineering Lanzhou University of TechnologyLanzhou730050China

Photovoltaic (PV) modules, as essential components of solar power generation systems, significantly influence unitpower generation *** service life of these modules directly affects these costs. Over time, the performanceof PV modules gradually declines due to internal degradation and external environmental *** cumulativedegradation impacts the overall reliability of photovoltaic power generation. This study addresses the complexdegradation process of PV modules by developing a two-stage Wiener process model. This approach accountsfor the distinct phases of degradation resulting from module aging and environmental influences. A powerdegradation model based on the two-stage Wiener process is constructed to describe individual differences inmodule degradation processes. To estimate the model parameters, a combination of the Expectation-Maximization(EM) algorithm and the Bayesian method is employed. Furthermore, the Schwarz Information Criterion (SIC) isutilized to identify critical change points in PV module degradation trajectories. To validate the universality andeffectiveness of the proposed method, a comparative analysis is conducted against other established life predictiontechniques for PV modules.

关键词： Photovoltaic modules degradation stochastic processes lifetime prediction

A QTC-based signal readout for position-sensitive multi-output detectors

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Nuclear Science and Techniques 2016年第5期27卷 208-214页

作者： Wei Zhou Zhi-Ming Zhang Dao-Wu Li pei-lin wang Bao-Tong Feng Xian-Chao Huang Ting-Ting Hu Xiao-Hui Li Yan Chen Ying-Jie wang Yan-Tao Liu Yi-Wen Zhang Shi-Feng Sun Xiao-Yue Gu Ming-Jie Yang Xiong Xiao Long Wei Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Beijing Engineering Research Center of Radiographic Techniques and Equipment Beijing 100049 China University of Chinese Academy of Sciences Beijing 100049

A new signal readout method for position-sensitive multi-output detectors,such as those in high-energy spectroscopy measurement and nuclear imaging,was developed by combining the charge division circuit,summing circuit and charge-to-time conversion(QTC) *** 64 outputs of a Hamamatsu H8500 position-sensitive photomultiplier tube were processed,and three digital pulses were *** widths of digital pulses were determined using the time-to-digital converter in an field programmable gate *** energy and position information of incident y-rays is estimated based on the proportionality between the width of digital pulses and input charge created by y-photons.A prototype was built using discrete components and tested,and the energy and position resolutions were improved compared with that obtained with standard *** method greatly simplifies the front-end electronics and the digital *** enables a compact electronics system and an easy integration into an ASIC.

关键词：输出信号位置灵敏探测器多输出读出位置灵敏光电倍增管现场可编程门阵列时间-数字转换器位置敏感探测器

Correlation between the Human Development Index and the Incidence and Mortality of Non-Hodgkin Lymphoma

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Current Medical Science 2023年第2期43卷 255-260页

作者： Wen-fu XU Ping YANG Zhi-wen WEI Jin-sheng LIU Ren-lin YAN Qian CHEN Ren-xiang TONG Shuang-yun XU Wan-qing GAO Wen ZHANG Zhen-zhen CHANG pei-lin wang Hong-juan FANG Yun-yun ZHENG Tao wang Na-na LIU Chao YAO Yan-li LIU Wei XIA Wei ZHAO Zhu-jun wang Department of Pediatrics the Second People’s Hospital of HefeiHefei Hospital Affiliated to Auhui Medical UniversityHefei230011China Quality Control Department the Second People’s Hospital of HefeiHefei Hospital Affiliated to Auhui Medical UniversityHefei230011China Department of Pediatrics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Objective This study was to examine the relationship between socioeconomic status and the incidence and mortality of non-Hodgkin lymphoma(NHL).Methods We compared the age-standardized incidence rate(ASIR),age-standardized mortality rate(ASMR),and the ASMR to ASIR ratio(MIR)at national and regional levels and studied the correlation between the MIR and the human development index(HDI)in 2012 and *** The highest ASIR was in North America in 2012 and in Australia in 2018,and the lowest ASIR was in Central and South Asia in both 2012 and *** highest ASMR was in North Africa in both 2012 and 2018,and the lowest ASMR was in Eastern Asia and South-Central Asia in 2012 and in South-Central Asia in *** lowest MIR was in Australia in both 2012 and 2018,and the highest MIR was in Western Africa in both 2012 and *** was strongly negatively correlated with MIR(r:−0.8810,P<0.0001,2012;r:−0.8895,P<0.0001,2018).Compared to the 2012 data,the MIR in the intermediate HDI countries significantly deceased and the HDI in low and high HDI countries significantly increased in *** The MIR is negatively correlated with *** the HDI in low and intermediate HDI countries may reduce the MIR and increase the survival of patients with NHL.

关键词： non-Hodgkin lymphoma incidence mortality human development index

RF Optimizer Model for Predicting Compressive Strength of Recycled Concrete

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 215-223页

作者： LIU lin wang Liuyan wang Hui SUN Huayue School of Civil Engineering and Architecture Shenyang UniversityShenyang 110000China

Traditional machine learning(ML)encounters the challenge of parameter adjustment when predicting the compressive strength of reclaimed *** address this issue,we introduce two optimized hybrid models:the Bayesian optimization model(B-RF)and the optimal model(Stacking model).These models are applied to a data set comprising 438 observations with five input variables,with the aim of predicting the compressive strength of reclaimed ***,we evaluate the performance of the optimized models in comparison to traditional machine learning models,such as support vector regression(SVR),decision tree(DT),and random forest(RF).The results reveal that the Stacking model exhibits superior predictive performance,with evaluation indices including R2=0.825,MAE=2.818 and MSE=14.265,surpassing the traditional ***,we also performed a characteristic importance analysis on the input variables,and we concluded that cement had the greatest influence on the compressive strength of reclaimed concrete,followed by ***,the Stacking model can be recommended as a compressive strength prediction tool to partially replace laboratory compressive strength testing,resulting in time and cost savings.

关键词： machine learning recycled concrete compressive strength

Calcium titanate corrosion inhibitor enabling carbon as inert anode for oxygen evolution in molten chlorides

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Transactions of Nonferrous Metals Society of China 2024年第10期34卷 3400-3411页

作者： Kai-fa DU Wen-miao LI pei-lin wang Lei GUO Di CHEN Yong-song MA Rui YU Hua-yi YIN Di-hua wang School of Resource and Environmental Sciences Wuhan UniversityWuhan 430072China Hubei International Scientific and Technological Cooperation Base of Sustainable Resources and Energy Wuhan 430072China

The corrosion inhibition efficacy of titanate(CaTiO_(3))for carbon anodes in molten salts was investigated through various analytical techniques,including linear sweep voltammetry,X-ray diffraction,scanning electron microscopy,and energy dispersion *** results demonstrate that the addition of CaTiO_(3)corrosion inhibitor efficiently passivates the carbon anode and leads to the formation of a dense CaTiO_(3)layer during the electrolysis process in molten CaCl_(2)-***,the passivated carbon anode effectively undergoes the oxygen evolution reaction,with an optimal current density for passivation identified at 400 m A/cm^(2).Comprehensive investigations,including CaTiO_(3)solubility tests in molten CaCl_(2)-CaO and numerical modeling of the stability of complex ionic structures,provide compelling evidence supporting“complexation-precipitation”passivation *** mechanism involves the initial formation of a complex containing TiO_(2)·nCaO by CaTiO_(3)and CaO,which subsequently decomposes to yield CaTiO_(3),firmly coating the surface of the carbon *** practical applications,the integration of CaTiO_(3)corrosion inhibitor with the carbon anode leads to the successful preparation of the FeCoNiCrMn high-entropy alloy without carbon contamination in the molten CaCl_(2)-CaO.

关键词： corrosion inhibitor calcium titanate carbon anode oxygen evolution reaction

Development of a fast neutron spectrometer based on a plastic fiber array

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Radiation Detection Technology and Methods 2017年第2期1卷 1-8页

作者： Fan-Jian Zeng Li-Yang Sun Kai Zhuang Heng An Yu-Xiong Xue Xiao-Ming wang Dao-Wu Li Zhi-Ming Zhang Bao-Tong Feng pei-lin wang Jia-Le Cai Xiu-Bo Qin De-Tian Li Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beijing Engineering Research Center of Radiographic Techniques and Equipment Beijing 100049China University of Chinese Academy of Sciences Beijing 100049China Lanzhou Institute of Physics Chinese Academy of Space TechnologyLanzhouGansu 730000China

Objective A three-dimensional position-sensitive fast neutron spectrometer is designed to measure fast neutron spectrum over 10 *** The detector consists of a 16×16 mutually perpendicular plastic scintillation fiber array coupled to 2×2 Hamamatsu H8500C position-sensitive photomultiplier tubes by optical *** fiber array is fabricated with 0.5 mm×3 mm fibers and 3-mm square *** Due to the combined application of different sizes of fibers,the detector can broaden energy dynamic range and meanwhile have good detection *** method of the combined application of different sizes of plastic fibers in the array may provide a solution to measure wider energy range of solar *** In this paper,we used FLUKA to simulate the performance of the detector model and report the results of experimental studies with neutrons from a pulsed D-T neutron.

关键词： Fast neutron Different sizes Fiber array Energy range

Wafer‑Scale Vertical 1D GaN Nanorods/2D MoS_(2)/PEDOT:PSS for Piezophototronic Effect‑Enhanced Self‑Powered Flexible Photodetectors

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Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin Tang Hongsheng Jiang Zhengliang lin Xuan wang Wenliang wang Guoqiang Li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors