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1Nanogenerator-Based Self-Powered Sensors for Wearable and Implantable Electronics显示文摘Wearable and implantable electronics(WIEs)are more and more important and attractive to the public,and they have had positive influences on all aspects of our lives.As a bridge between wearable electronics and their surrounding environment and users,sensors are core components of WIEs and determine the implementation of their many functions.Although the existing sensor technology has evolved to a very advanced level with the rapid progress of advanced materials and nanotechnology,most of them still need external power supply,like batteries,which could cause problems that are difficult to track,recycle,and miniaturize,as well as possible environmental pollution and health hazards.In the past decades,based upon piezoelectric,pyroelectric,and triboelectric effect,various kinds of nanogenerators(NGs)were proposed which are capable of responding to a variety of mechanical movements,such as breeze,body drive,muscle stretch,sound/ultrasound,noise,mechanical vibration,and blood flow,and they had been widely used as self-powered sensors and micro-nanoenergy and blue energy harvesters.This review focuses on the applications of self-powered generators as implantable and wearable sensors in health monitoring,biosensor,human-computer interaction,and other fields.The existing problems and future prospects are also discussed.Zhe Li Qiang Zheng Zhong Lin Wang Zhou Li 2020Research2020,,1:17
20.04 degree-per-hour MEMS disk resonator gyroscope with high-quality factor (510 k) and long decaying time constant(74.9 s)显示文摘The disk resonator gyroscope is an attractive candidate for high-performance MEMS gyroscopes.This gyroscope consists of a sensor and readout electronics,and the characteristics of the sensor directly determine the performance.For the sensor,a high-quality factor and long decaying time constant are the most important characteristics required to achieve high performance.We report a disk resonator gyroscope with a measured quality factor of 510 k and decaying time constant of 74.9 s,which is a record for MEMS silicon disk resonator gyroscopes,to the best of our knowledge.To improve the quality factor of the DRG,the quality factor improvement mechanism is first analyzed,and based on this mechanism two stiffness-mass decoupled methods,i.e.,spoke length distribution optimization and lumped mass configuration design,are proposed and demonstrated.A disk resonator gyroscope prototype is fabricated based on these design strategies,and the sensor itself shows an angle random walk as low as 0.001°/√h,demonstrating true potential to achieve navigation-grade performance.The gyroscope with readout electronics shows an angle random walk of 0.01°/√h and a bias instability of 0.04°/h at room temperature without compensation,revealing that the performance of the gyroscope is severely limited by the readout electronics,which should be further improved.We expect that the quality factor improvement methods can be used in the design of other MEMS gyroscopes and that the newly designed DRG can be further improved to achieve navigation-grade performances for high-end industrial,transportation,aerospace,and automotive applications.Qingsong Li Dingbang Xiao Xin Zhou Yi Xu Ming Zhuo Zhanqiang Hou Kaixuan He Yongmeng Zhang Xuezhong Wu 2018Microsystems & Nanoengineering2018,4,1:16
3A hybrid model for numerical wave forecasting and its implementation-Ⅰ.The wind wave model显示文摘The authors make an endeavor to explain why a new hybrid wave model is here proposed when several such models have already been in operation and the so- called third generation wave modej is proving attractive. This part of the paper is devoted to the wind wave model. Both deep and shallow water models have been developed, the former being actually a special case of the latter when water depth is great. The deep water model is exceptionally simple in form. Significant wave height is the only prognostic variable. In comparison with the usual methods to compute the energy input and dissipations empirically or by 'tuning', the proposed model has the merit that the effects of all source terms are combined into one term which is computed through empirical growth relations for significant waves, these relations being, relatively speaking, easier and more reliable to obtain than those for the source terms in the spectral energy balance equation. The discrete part of the model and the implementation of theWen Shengchang (S.C. Wen)1, Zhang Dacuo, Chen Bohai and Guo Peifang Institute of Physical Oceanography, Ocean University of Qingdao (Formerly, Shandong College of Oceanography), Qingdao, China 1989Acta Oceanologica Sinica1989,8,1:14
4Optical sensors for power transformer monitoring:A review显示文摘Power transformers play a vital role in power transmission systems from the energy source to the consumption center.In situ diagnostics of the performance of power transformers provides a variety of benefits to ensure reliable electricity transmission.Immunity to electromagnetic interference,high sensitivity,high insulation as well as small dimensions of optical sensing make it very attractive for applications in power transformer monitoring.This paper presents a critical review of various diagnostic methods for power transformers such as partial discharge,dissolved gases,temperature and other important sensing,and optical detection.The advantages and disadvantages of different monitoring methods are carefully discussed and assessed.Finally,the existing technical barriers and future prospects of optical monitoring methods for power transformers are presented.Guoming Ma Yuan Wang Weiqi Qin Hongyang Zhou Chao Yan Jun Jiang Yiguang Ju 2021High Voltage2021,6,3:7
5Identification of advanced spin-driven thermoelectric materials via interpretable machine learning显示文摘Machine learning is becoming a valuable tool for scientific discovery.Particularly attractive is the application of machine learning methods to the field of materials development,which enables innovations by discovering new and better functional materials.To apply machine learning to actual materials development,close collaboration between scientists and machine learning tools is necessary.However,such collaboration has been so far impeded by the black box nature of many machine learning algorithms.It is often difficult for scientists to interpret the data-driven models from the viewpoint of material science and physics.Here,we demonstrate the development of spin-driven thermoelectric materials with anomalous Nernst effect by using an interpretable machine learning method called factorized asymptotic Bayesian inference hierarchical mixture of experts(FAB/HMEs).Based on prior knowledge of material science and physics,we were able to extract from the interpretable machine learning some surprising correlations and new knowledge about spin-driven thermoelectric materials.Guided by this,we carried out an actual material synthesis that led to the identification of a novel spin-driven thermoelectric material.This material shows the largest thermopower to date.Yuma Iwasaki Ryohto Sawada Valentin Stanev Masahiko Ishida Akihiro Kirihara Yasutomo Omori Hiroko Someya Ichiro Takeuchi Eiji Saitoh Shinichi Yorozu 2019npj Computational Materials2019,,1:7
6Inside-Out 3D Reversible Ion-Triggered Shape-Morphing Hydrogels显示文摘Shape morphing is a critical aptitude for the survival of organisms and is determined by anisotropic tissue composition and directional orientation of micro-and nanostructures within cell walls,resulting in diferent swelling behaviors.Recent eforts have been dedicated to mimicking the behaviors that nature has perfected over billions of years.We present a robust strategy for preparing 3D periodically patterned single-component sodium alginate hydrogel sheets cross-linked with Ca^(2+)ions,which can reversibly deform and be retained into various desirable inside-out shapes as triggered by biocompatible ions(Na^(+)/Ca^(2+)).By changing the orientations of the patterned microchannels or triggering with Na^(+)/Ca^(2+)ions,various 3D twisting,tubular,and plantinspired architectures can be facilely programmed.Not only can the transformation recover their initial shapes reversibly,but also it can keep the designated shapes without continuous stimuli.Tese inside-out 3D reversible ion-triggered hydrogel transformations shall inspire more attractive applications in tissue engineering,biomedical devices,and sof robotics felds.X.Du H.Cui Q.Zhao J.Wang H.Chen Y.Wang 2019Research2019,,1:5
7Engineering cyanobacteria for fuels and chemicals production显示文摘The world’s energy and global warming crises call for sustainable,renewable,carbon-neutral alternatives to replace fossil fuel resources.Currently,most biofuels are produced from agricultural crops and residues,which lead to concerns about food security and land shortage.Compared to the current biofuel production system,cyanobacteria,as autotrophic prokaryotes,do not require arable land and can grow to high densities by efficiently using solar energy,CO2,water,and inorganic nutrients.Moreover,powerful genetic techniques of cyanobacteria have been developed.For these reasons,cyanobacteria,which carry out oxygenic photosynthesis,are attractive hosts for production of fuels and chemicals.Recently,several chemicals including ethanol,isobutanol and isoprene have been produced by engineered cyanobacteria directly using solar energy,CO2,and water.Cyanobacterium is therefore a potential novel cell factory for fuels and chemicals production to address global energy security and climate change issues.Jie Zhou Yin Li 2010Protein & Cell2010,1,3:4
8Genetically modified foods in China and the United States:A primer of regulation and intellectual property protection显示文摘Food is a basic and personal necessity to human.Safety of food is a prime factor to consider apart from nutrition,quality and cost.Genetically modified(GM)foods first came on the market in 1994.Yet safety,transparency and traceability ofGMfoods are still under hot debate.Nonetheless,the market of GM foods is huge and attractive.Regulatory affairs and intellectual property(IP)are two critical factors affecting the development and commercial success of a food product.This article will take a look at the GM food technology and regulatory framework for GM foods in China and the United States.This article will also discuss the unique patent issues and non-patent IP tools for safeguarding the technology in these two countries.Alice Yuen-Ting Wong Albert Wai-Kit Chan 2016Food Science and Human Wellness2016,5,3:4
9The BET family in immunity and disease显示文摘Innate immunity serves as the rapid and frst-line defense against invading pathogens,and this process can be regulated at various levels,including epigenetic mechanisms.The bromodomain and extraterminal domain(BET)family of proteins consists of four conserved mammalian members(BRD2,BRD3,BRD4,and BRDT)that regulate the expression of many immunity-associated genes and pathways.In particular,in response to infection and sterile inflammation,abnormally expressed or dysfunctional BETs are involved in the activation of pattern recognition receptor(e.g,TLR,NLR,and CGAS)pathways,thereby linking chromatin machinery to innate immunity under disease or pathological conditions.Mechanistically,the BET family controls the transcription of a wide range of proinflammatory and immunoregulatory genes by recognizing acetylated histones(mainly H3 and H4)and recruiting transcription factors(e.g.,RELA)and transcription elongation complex(e.g.P-TEFb)to the chromatin,thereby promoting the phosphorylation of RNA polymerase II and subsequent transcription initiation and elongation.This review covers the accumulating data about the roles of the BET family in innate immunity,and discusses the attractive prospect of manipulating the BET family as a new treatment for disease.Nian Wang Runliu Wu Daolin Tang Rui Kang 2021Signal Transduction and Targeted Therapy2021,6,2:4
10Metasurfaces for manipulating terahertz waves显示文摘Terahertz(THz)science and technology have attracted significant attention based on their unique applications in non-destructive imaging,communications,spectroscopic detection,and sensing.However,traditional THz devices must be sufficiently thick to realise the desired wave-manipulating functions,which has hindered the development of THz integrated systems and applications.Metasurfaces,which are two-dimensional metamaterials consisting of predesigned meta-atoms,can accurately tailor the amplitudes,phases,and polarisations of electromagnetic waves at subwavelength resolutions,meaning they can provide a flexible platform for designing ultra-compact and high-performance THz components.This review focuses on recent advancements in metasurfaces for the wavefront manipulation of THz waves,including the planar metalens,holograms,arbitrary polarisation control,special beam generation,and active metasurface devices.Such ultra-compact devices with unique functionality make metasurface devices very attractive for applications such as imaging,encryption,information modulation,and THz communications.This progress report aims to highlight some novel approaches for designing ultra-compact THz devices and broaden the applications of metasurfaces in THz science.Xiaofei Zang Bingshuang Yao Lin Chen Jingya Xie Xuguang Guo Alexei VBalakin Alexander P.Shkurinov Songlin Zhuang 2021Light(Advanced Manufacturing)2021,2,2:4
11Metastability of exponentially perturbed Markov chains显示文摘A family of irreducible Markov chains on a finite state space is considered as an exponential perturbation of a reducible Markov chain. This is a generalization of the Freidlin-Wentzell theory, motivated by studies of stochastic Ising models, neural network and simulated annealing. It is shown that the metastability is a universal feature for this wide class of Markov chains. The metastable states are simply those recurrent states of the reducible Markov chain. Higher level attractors, related attractive basins and their pyramidal structure are analysed. The logarithmic asymptotics of the hitting time of various sets are estimated. The hitting time over its mean converges in law to the unit exponential distribution.陈大岳 冯建峰 钱敏平 1996Science China Mathematics1996,39,1:3
12FourierCam:a camera for video spectrum acquisition in a single shot显示文摘The novel camera architecture facilitates the development of machine vision. Instead of capturing frame sequences in the temporal domain as traditional video cameras, Fourier Cam directly measures the pixel-wise temporal spectrum of the video in a single shot through optical coding. Compared to the classic video cameras and timefrequency transformation pipeline, this programmable frequency-domain sampling strategy has an attractive combination of characteristics for low detection bandwidth, low computational burden, and low data volume.Based on the various temporal filter kernel designed by Fourier Cam, we demonstrated a series of exciting machine vision functions, such as video compression, background subtraction, object extraction, and trajectory tracking.CHENGYANG HU HONGHAO HUANG MINGHUA CHEN SIGANG YANG HONGWEI CHEN 2021Photonics Research2021,9,5:3
13NPR1 as a transgenic crop protection strategy in horticultural species显示文摘The NPR1(NONEXPRESSOR OF PATHOGENESIS RELATED GENES1)gene has a central role in the long-lasting,broad-spectrum defense response known as systemic acquired resistance(SAR).When overexpressed in a transgenic context in Arabidopsis thaliana,this gene enhances resistance to a number of biotic and abiotic stresses.Its position as a key regulator of defense across diverse plant species makes NPR1 a strong candidate gene for genetic engineering disease and stress tolerance into other crops.High-value horticultural crops face many new challenges from pests and pathogens,and their emergence exceeds the pace of traditional breeding,making the application of NPR1-based strategies potentially useful in fruit and vegetable crops.However,plants overexpressing NPR1 occasionally present detrimental morphological traits that make its application less attractive.The practical utility of NPR-based approaches will be a balance of resistance gains versus other losses.In this review,we summarize the progress on the understanding of NPR1-centered applications in horticultural and other crop plants.We also discuss the effect of the ectopic expression of the A.thaliana NPR1 gene and its orthologs in crop plants and outline the future challenges of using NPR1 in agricultural applications.Katchen Julliany P.Silva Nasser Mahna Zhonglin Mou Kevin M.Folta 2018Horticulture Research2018,5,1:3
14Silicon/2D-material photodetectors: from nearinfrared to mid-infrared显示文摘Two-dimensional materials(2DMs)have been used widely in constructing photodetectors(PDs)because of their advantages in flexible integration and ultrabroad operation wavelength range.Specifically,2DM PDs on silicon have attracted much attention because silicon microelectronics and silicon photonics have been developed successfully for many applications.2DM PDs meet the imperious demand of silicon photonics on low-cost,high-performance,and broadband photodetection.In this work,a review is given for the recent progresses of Si/2DM PDs working in the wavelength band from near-infrared to mid-infrared,which are attractive for many applications.The operation mechanisms and the device configurations are summarized in the first part.The waveguide-integrated PDs and the surface-illuminated PDs are then reviewed in details,respectively.The discussion and outlook for 2DM PDs on silicon are finally given.Chaoyue Liu Jingshu Guo Laiwen Yu Jiang Li Ming Zhang Huan Li Yaocheng Shi Daoxin Dai 2021Light(Science & Applications)2021,10,7:3
15A NEW CHARACTERIZATION OF THE SPORADIC SIMPLE GROUPS显示文摘There are many different characterizations to the attractive sporadic groups. In this letter Ⅰ continue the former discussions and characterize uniformly the 26 sporadic simple groups using only the set π_e(G) of the orders of elements in groups G and |G|. We prove the following theorem.施武杰 1988Chinese Science Bulletin1988,33,9:2
16Arenesulfonyl Fluoride Synthesis via Copper-free Sandmeyer-type Fluorosulfonylation of Arenediazonium Salts显示文摘Summary of main observation and conclusion The limited availability of highly valuable arenesulfonyI fluorides seriously hinders their further applica-tion in many research fields including medicinal chemistry and chemical biological,organic synthesis,polymer preparation,etc.We report herein a mild and eficient copper-fre Sandmeyer-type fluorosulfonylation reaction of various arenediazonium salts to prepare valuable arenesulfonyl fluorides using KxS2Os as both a reductant and a practical sulfonyl source in combination with N-fluorobenzenesulfonimide as an effective fluorine source.This method-ology provides an attractive route to diverse important arenesulfonyl fluorides given the overall practicality and scope.Qiongzhen Lin Zhanhu Ma Changge Zheng Xiao-Jun Hu Yong Guo Qing-Yun Chen Chao Liu 2020Chinese Journal of Chemistry2020,38,10:2
17Generating Giant Membrane Vesicles from Live Cells with Preserved Cellular Properties显示文摘Biomimetic giant membrane vesicles,with size and lipid compositions comparable to cells,have been recognized as an attractive experimental alternative to living systems.Due to the similarity of their membrane structure to that of body cells,cell-derived giant plasma membrane vesicles have been used as a membrane model for studying lipid/protein behavior of plasma membranes.However,further application of biomimetic giant membrane vesicles has been hampered by the side-efects of chemical vesiculants and the utilization of osmotic bufer.We herein develop a facile strategy to derive giant membrane vesicles(GMVs)from mammalian cells in biofriendly medium with high yields.Tese GMVs preserve membrane properties and adaptability for surface modifcation and encapsulation of exogenous molecules,which would facilitate their potential biological applications.Moreover,by loading GMVs with therapeutic drugs,GMVs could be employed for drug transport to tumor cells,which represents another step forward in the biomedical application of giant membrane vesicles.Tis study highlights biocompatible GMVs with biomimicking membrane surface properties and adaptability as an ideal platform for drug delivery strategies with potential clinical applications.Qiaoling Liu Cheng Bi Jiangling Li Xuejiao Liu Ruizi Peng Cheng Jin Yang Sun Yifan Lyu Hui Liu Huijing Wang Can Luo Weihong Tan 2019Research2019,,1:2
18Metal-Organic Framework Membranes and Membrane Reactors:Versatile Separations and Intensified Processes显示文摘Metal-organic frameworks are an emerging and fascinating category of porous solids that can be self-assembled with metal-based cations linked by organic molecules.The unique features of MOFs in porosity(or surface areas),together with their diversity for chemical components and architectures,make MOFs attractive candidates in many applications.MOF membranes represent a long-term endeavor to convert MOF crystals in the lab to potentially industry-available commodities,which,as a promising alternative to distillation,provide a bright future for energy-efficient separation technologies closely related with chemicals,the environment,and energy.The membrane reactor shows a typical intensified process strategy by combining the catalytic reaction with the membrane separation in one unit.This review highlights the recent process of MOF-based membranes and the importance of MOF-based membrane reactors in relative intensified chemical processes.Yujie Ban Na Cao Weishen Yang 2020Research2020,,1:2
19On a delay ratio-dependent predator-prey system with feedback controls and shelter for the prey显示文摘In this paper,a class of three-species multi-delay Lotka-Volterra ratio-dependent predator-prey model with feedback controls and shelter for the prey is considered.A set of easily verifiable sufficient conditions which guarantees the permanence of the system and the global attractivity of positive solution for the predator-prey system are established by developing some new analysis methods and using the theory of differentim inequalities as well as constructing a suitable Lyapunov function.Furthermore,some conditions for the existence,uniqueness and stability of positive periodic solution for the corresponding periodic system are obtained by using the fixed point theory and some new analysis techniques.In addition,some numerical solutions of the equations describing the system are given to show that the obtained criteria are new,general,and easily verifiable.Finally,we still solve numerically the corresponding stochastic predator-prey models with multiplicative noise sources,and obtain some new interesting dynamical behaviors of the system.At the same time,the influence of the delays and shelters on the dynamics behavior of the system is also considered by solving numerically the predator-prey models.Changyou Wang Linrui Lit Yuqian Zhou Rui Li 2018International Journal of Biomathematics2018,11,7:2
20COIL-8:Ionic liquids for tomorrow显示文摘Since the first report of air-and water-stable ionic liquids in 1992,the development of ionic liquids has taken a big step forward in both fundamental research and industrial applications with more than 20 years of joint efforts.The unique characteristics of ionic liquids render them attractive not only for function as solvents/catalysts but also for alternative roles across the fields of energy,environment,chemistry,and material processing,etc.At this moment,the field of ionic liquids would have stepping into a new era.Suojiang Zhang 2020Green Energy & Environment2020,5,2:2
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