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| 1 | Frequency/time hopping sequence sets with optimal partial Hamming correlation properties显示文摘Frequency hopping/time hopping(FH/TH) sequences have found wide applications in various modern FH/TH spread spectrum communications,such as digital cellular mobile communication,short-range wireless communication,personal communication,and multi-user radar,sonar systems.In order to evaluate the goodness of FH/TH sequences design,the periodic Hamming correlation function is used as an important measure.Usually,the length of correlation window is shorter than the period of the chosen FH/TH sequence,so the study of the partial Hamming correlation of FH/TH sequence is particularly important.In this paper,a new class of FH/TH sequence sets with good partial Hamming correlation properties is proposed and investigated.The construction of new FH/TH sequence sets is based upon the generalized m-sequence and generalized Gordon-Mills-Welch sequence over a polynomial residue class ring.It is shown that new FH/TH sequence sets are optimal with respect to the partial Hamming correlation bound. | NIU XianHua PENG DaiYuan ZHOU ZhengChun | 2012 | Science China(Information Sciences)2012，55，10： | 10 |
| 2 | Dynamics of NDVI and its influencing factors in the Chinese Loess Plateau during 2002-2018显示文摘Understanding the spatio-temporal changes of vegetation and its climatic control factors can provide an important theoretical basis for the protection and restoration of eco-environments.In this study,we analyzed the normalized difference vegetation index(NDVI)in the Chinese Loess Plateau(CLP)from 2002 to 2018 via trend analysis,stability analysis,and Mann-Kendall mutation test to investigate the change of vegetation.In addition,we also used the skewness analysis and correlation analysis to explore the contribution of climate change and human activities on regional vegetation changes.The results indicated that the overall increasing trend of NDVI from 2002 to 2018 was significant The areas showing increased NDVI were mainly distributed in the south-eastern CLP and the irrigation districts of the Yellow River to the north and west of the CLP,while the areas showing decreased NDVl were concentrated in the desert of the westem Ordos Plateau,Longzhong Loess Plateau,and the built-up and adjacent areas.Precipitation was the dominant factor contributing to vegetation growth in the CLP,while vegetation was less dependent onprecipitation in the irigation districts.The increasement of NDVI has led to a prolonged responsetime of vegetation to water stress and a lag effect of less than two months in the CLP.The effect of temperature on NDVI was not significant;significant negative correlations between NDVI and temperature were found only in the desert,the Guanzhong Plain,the southem Liupan Mountains,and the southeastem Taihang Mountains,owing to high temperatures,urban heat islands,and large cloud cover in mountainous areas.Affected by the'Grain for Green Program'(GGP),NDVIin the CLP increased from 2002 to 2018;however,the increasing trends of NDNI for differentvegetation cover types were significantly different owing to the difference in background status.The increasing contribution rate of NDVI in the CLP mainly came from crops and steppes.Urban not only led to the destruction of vegetation but also had radiation effect causing negative impact of NDVI around the cities.This resulted in the aggravation of the negative bias of NDVI with time in the CLP.The results provide a long-term perspective for regional vegetation protection and utilization in the CLP. | Peng He Lishuai Xu Zhengchun Liu Yaodong Jing Wenbo Zhu | 2021 | Regional Sustainability2021，2，1： | 4 |
| 3 | Electrochemical performance of a three-layer electrode based on Bi nanoparticles,multi-walled carbon nanotube composites for simultaneous Hg(Ⅱ)and Cu(Ⅱ)detection显示文摘Electrochemical analysis is a promising technique for detecting biotoxic and non-biodegradable heavy metals.This article proposes a novel composite electrode based on a polyaniline(PANi)fra mework doped with bismuth nanoparticle@graphene oxide multi-walled carbon nano tubes(Bi NPs@GO-MWCNTs)for the simultaneous detection of multiple heavy metal ions.Composite electrodes are prepared on screenprinted electrodes(SPCEs)using an efficient dispensing technique.We used a SM200 SX-3 A dispenser to load a laborato ry-specific ink with optimized viscosity and adhesion to draw a pattern on the work area.The SPCE was used as substrate to facilitate cost-effective and more convenient real-time detection technology.Electrochemical techniques,such as cyclic voltammetry and differential pulse voltammetry,were used to demonstrate the sensing capabilities of the proposed sensor,The sensitivity,limit of detection,and linear range of the PANi-Bi NPs@GO-MWCNT electrode are 2.57×10^(2)μA Lμmol^(-1) cm^-2,0.01 nmol/L,and 0.01 nmol/L-5 mmol/L and 0.15×10^(-1)μALμmol^(-1) cm^-2,0.5 nmol/L,and 0.5 nmol/L-5 mmol/L for mercury ion(Hg(Ⅱ))and copper ion(Cu(Ⅱ))detection,respectively.In addition,the electrode exhibits a good selectivity and repeatability for Hg(Ⅱ)and Cu(Ⅱ)sensing when tested in a complex heavy metal ion solution.The constructed electrode system exhibits a detection performance superior to similar methods and also increases the types of heavy metal ions that can be detected.Therefore,the proposed device can be used as an efficient sensor for the detection of multiple heavy metal ions in complex environments. | Qiwen Bao Gang Li Zhengchun Yang Peng Pan Jun Liu Jiayuan Chang Jun Wei Ling Lin | 2020 | Chinese Chemical Letters2020，31，10： | 2 |
| 4 | Graphene-loaded metal wire grating for deep and broadband THz modulation in total internal reflection geometry显示文摘We employed a metallic wire grating loaded with graphene and operating in total internal reflection (TIR) geometry to realize deep and broadband THz modulation. The non-resonant field enhancement effect of the evanescent wave in TIR geometry and in the subwavelength wire grating was combined to demonstrate a ~77% modulation depth (MD) in the frequency range of 0.2–1.4 THz. This MD, achieved electrically with a SiO_2∕Si gated graphene device, was 4.5 times higher than that of the device without a metal grating in transmission geometry. By optimizing the parameters of the metallic wire grating, the required sheet conductivity of graphene for deep modulation was lowered to 0.87 mS. This work has potential applications in THz communication and real-time THz imaging. | YIWEN SUN RICCARDO DEGLJINNOCENTI DAVID A.RITCHIE HARVEY E.BEERE LONG XIAO MICHAEL RUGGIERO J.AXEL ZEITLER RAYKO I.STANTCHEV DANNI CHEN ZHENGCHUN PENG EMMA MACPHERSON XUDONG LIU | 2018 | Photonics Research2018，6，12： | 2 |
| 5 | Investigation of Fog Collection on Cactus-inspired Structures显示文摘 | Xianhua Tan Tielin Shi Zirong Tang Bo Sun Li Du Zhengchun Peng Guanglan Liao | 2016 | Journal of Bionic Engineering2016，13，3： | 2 |
| 6 | Gas sensing using hierarchical micro/nanostructures of Morpho butterfly scales显示文摘 | Ting Jiang Zhengchun Peng Wenjun Wu Tielin Shi Guanglan Liao | 2014 | Sensors & Actuators: A Physical2014，，： | 1 |
| 7 | Visible-Light Photocatalytic Activity of TiO_(2) Nanorods and Its Application to Degrading Organic Pollutants显示文摘Fluorine-doped tin oxide(FTO)/TiO_(2) seed layer/TiO_(2) nanorods were prepared by ion-beam deposition and hydrothermal methods.Under UV light,the photocurrent density of these nanorods was found to reach 1.39 mA/cm^(2),which was higher than that without the seed layer and nanorod structures.Furthermore,the FTO/TiO_(2) seed layer/TiO_(2) nanorods can also absorb visible light,overcoming a notable problem with standard TiO_(2).The photocurrent density of the FTO/TiO_(2) seed layer/TiO_(2) nanorods was found to reach 0.21 mA/cm^(2) under visible light.This high-performance results from the deposition of the TiO_(2) seed layer,which reduces the band gap of TiO_(2).The FTO/TiO_(2) seed layer/TiO_(2) nanorods also exhibited high photodegradation ability for the organic pollutant methylene blue(MB).Within 120 min,77.3%of the MB was found to have been degraded,and the degradation rates remained almost unchanged after four cycles with the same catalyst sample.Additionally,compared with powdered photocatalysts,the FTO/TiO_(2) seed layer/TiO_(2) nanorod sample is easy to recover,requiring only rinsing with water and natural drying after the reaction. | He Jie Shi Chaojie Yang Zhengchun Hou Qiang Zhang Rui Zhu Tianjia Pan Peng Zhang Ping | 2022 | China Petroleum Processing & Petrochemical Technology2022，24，2： | 1 |
| 8 | Utility of TPP-manufactured biophysical restrictions to probe multiscale cellular dynamics显示文摘Biophysical restrictions regulate protein diffusion,nucleus deformation,and cell migration,which are all universal and important processes for cells to perform their biological functions.However,current technologies addressing these multiscale questions are extremely limited.Herein,through two-photon polymerization(TPP),we present the precise,low-cost,and multiscale microstructures(micro-fences)as a versatile investigating platform.With nanometer-scale printing resolution and multiscale scanning capacity,TPP is capable of generating micro-fences with sizes of 0.5-1000μm.These micro-fences are utilized as biophysical restrictions to determine the fluidity of supported lipid bilayers(SLB),to investigate the restricted diffusion of Src family kinase protein Lck on SLB,and also to reveal the mechanical bending of cell nucleus and T cell climbing ability.Taken together,the proposed versatile and low-cost micro-fences have great potential in probing the restricted dynamics of molecules,organelles,and cells to understand the basics of physical biology. | Panyu Fei Haibo Ding Yu Duan Xinyi Wang Wei Hu Peng Wu Mengxiao Wei Zhengchun Peng Zhongze Gu Wei Chen | 2021 | Bio-Design and Manufacturing2021，4，4： | 0 |
| 9 | Thin,soft,skin-integrated electronics for real-time and wireless detectionof uricacid in sweat显示文摘Wearable sweat sensors are gaining significant attention due to their unparalleled potential for noninvasive health monitoring.Sweat,as a kind of body fluid,contains informative physiological indicators that are related to personalized health status.Advances in wearable sweat sampling and routing technologies,flexible,and stretchable materials,and wireless digital technologies have led to the development of integrated sweat sensors that are comfortable,flexible,light,and intelligent.Herein,we report a flexible and integrated wearable device via incorporating a microfluidic system and a sensing chip with skin-integrated electronic format toward in-situ monitoring of uric acid(UA)in sweat that associates with gout,cardiovascular,and renal diseases.The microfluidic system validly realizes the real-time capture perspiration from human skin.The obtained detection range is 5-200μM and the detection limit is 1.79μM,which offers an importance diagnostic method for clinical relevant lab test.The soft and flexible features of the constructed device allows it to be mounted onto nearly anywhere on the body.We tested the sweat UA in diverse subjects and various body locations during exercise,and similar trends were also observed by using a commercial UA assay kit. | Yue Hu Lan Wang Jian Lia Yawen Yang Guangyao Zhao Yiming Liu Xingcan Huang Pengcheng Wu Binbin Zhang Yanli Jia Mengge Wu Shengxin Jia Qiang Zhang Guoqiang Xu Rui Shi Dengfeng Li Yingchun Li Zhengchun Peng Xinge Yu | 2023 | International Journal of Smart and Nano Materials2023，14，4： | 0 |
| 10 | Chemical Scissors Tailored Nano‑Tellurium with High‑Entropy Morphology for Efficient Foam‑Hydrogel‑Based Solar Photothermal Evaporators显示文摘The development of tellurium(Te)-based semiconductor nanomaterials for efficient light-to-heat conversion may offer an effective means of harvesting sunlight to address global energy concerns.However,the nanosized Te(nano-Te)materials reported to date suffer from a series of drawbacks,including limited light absorption and a lack of surface structures.Herein,we report the preparation of nano-Te by electrochemical exfoliation using an electrolyzable room-temperature ionic liquid.Anions,cations,and their corresponding electrolytic products acting as chemical scissors can precisely intercalate and functionalize bulk Te.The resulting nano-Te has high morphological entropy,rich surface functional groups,and broad light absorption.We also constructed foam hydrogels based on poly(vinyl alcohol)/nano-Te,which achieved an evaporation rate and energy efficiency of 4.11 kg m^(−2)h^(−1)and 128%,respectively,under 1 sun irradiation.Furthermore,the evaporation rate was maintained in the range 2.5-3.0 kg m^(−2)h^(−1)outdoors under 0.5-1.0 sun,providing highly efficient evaporation under low light conditions. | Chenyang Xing Zihao Li Ziao Wang Shaohui Zhang Zhongjian Xie Xi Zhu Zhengchun Peng | 2024 | Nano-Micro Letters2024，16，3： | 0 |
| 11 | A ternary heterogeneous hydrogel with strength elements for resilient,self-healing,and recyclable epidermal electronics显示文摘Epidermal sensing devices,which mimic functionalities and mechanical properties of natural skin,offer great potential for real-time health monitoring via continuous checking of vital signs.However,most existing skin-mounted electronics use a flexible film with high elastic modulus,which hinders physical activity and causes interfacial delamination and skin irritation.The compliance of hydrogel-based devices can firmly conform to complex,curved surfaces without introducing excessive interfacial stresses.However,most hydrogels still suffer from the weakness of stable and reproducible sensing.In this work,we report a skin-friendly epidermal electronic made of a resilient,self-healing,and recyclable polyvinyl alcohol(PVA)hydrogel.The hydrogel is reinforced through a ternary heterogeneous network for good mechanical robustness while maintaining high stretchability and exceptional conformability.Simultaneously,the abundant dynamic hydrogen bonds give the hydrogel rapid self-healing ability.The assembled hydrogel epidermal electronic is able to stably monitor multiple physiological signals as well as sense the strain level of the skin motion and joint bending.The unique,versatile,environmental and biological friendly epidermal electronics will have broad applications in health care,human-machine interface,augmented reality,and so on. | Ziya Wang Xiuru Xu Yingtian Xu Waner Lin Zhengchun Peng | 2022 | npj Flexible Electronics2022，6，1： | 0 |
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