A Novel Bidirectional Interaction Model and Electric Energy Measuring Scheme of EVs for V2G with Distorted Power Loads

With the increasing demand for petroleum resources and environmental issues,new energy electric vehicles are increasingly being used.However,the large number of electric vehicles connected to the grid has brought new challenges to the operation of the grid.Firstly,A novel bidirectional interaction model is established based on modulation theory with nonlinear loads.Then,the electric energy measuring scheme of EVs for V2G is derived under the conditions of distorted power loads.The scheme is composed of fundamental electric energy,fundamental-distorted electric energy,distorted-fundamental electric energy and distorted electric energy.And the characteristics of each electric energy are analyzed.Finally,the correctness of the model and energy measurement method is verified by three simulation cases:the impact signals,the fluctuating signals,and the harmonic signals.

SYNTHESIS OF BENZO－15－CROWN－5 PHENOL－FORMALDEHYDE RESIN FOR LITHIUM ISOTOPE SEPARATION

Four kinds of phenol-formaldehyde resins containing benzo-15-crown-5 ether were synthesized for lithium isotope separation.The adsolptioncapacity and isotope effect of Liin these resins have been investigated. Singleseparation factors 1.023￣1.056 were obtained with batch method from isotoperatios, 6Li and Li'were enriched in tile resin phase and liquid phase, respectively.

Medical Journals in China: From Wuyi Huijiang to Chinese Medical Journal and hLife

As Professor Jiaxi Lu,the former president of the Chinese Academy of Sciences(CAS),said,“Academic journals are both the‘tail’and the‘head’of a dragon”[1].Professor Zuoyan Zhu,former editor-in-chief of both Science China and Science Bulletin,also once said,“Let Chinese scientific journals grow along with scientific research in China”[2].Academic journals are important carriers for the exchange and dissemination of innovation and achievement in science and are important gardens for the training of scientific talent;also,they play an important role in carrying out an evaluation of academic work.Medical journals are an important component of the academic journal sphere,not only because they account for onethird of academic journals but also because they are directly related to human health。

Self-powered flexible fingerprint-recognition display based on a triboelectric nanogenerator

In the time of Internet of Things(IoT),alternating current electroluminescence(ACEL)has unique advantages in the fields of smart display and human–computer interaction.However,their reliance on external high-voltage AC power supplies poses challenges in terms of wearability and limits their practical application.This paper proposed an innovative scheme for preparing a feather triboelectric nanogenerator(F-TENG)using recyclable and environmentally friendly material.The highest open-circuit voltage,short-circuit current,and transferred charge of SF6-treated F-TENGs can reach 449 V,63μA,and 152 nC,which enables easy lighting of BaTiO_(3)^(-)doped ACEL devices.Using a human electrical potential,a single-electrode F-TENG is combined with ACEL device for self-powered fingerprint recognition display.These works achieve self-powered flexible wearable ACEL devices,which are not only efficient and portable but also have good application prospects in the human–computer interaction,functional displays,and wearable electronic devices.

Launch of the transdisciplinary health science journal hLife

The launch ceremony of the health science journal hLife was held at the Institute of Microbiology,Chinese Academy of Sciences(CAS)on 15 November 2023.Nearly 100 guests attended the event,including the editors-in-chief of hLife and editorial board members,representatives from sister journals,regulatory agency leaders,and leaders of the Institute of Microbiology,CAs,and other related departments(Fig.1).

Systematic study on size and temporal dependence of micro-LED arrays for display applications

Micro-LEDs are one of the most promising candidates for next-generation displays,yet they are inconvenienced by the efficiency reduction induced by the sidewall defects when pursuing further scaled-down device dimensions.We have systematically investigated both the size and temporal dependence of micro-LEDs.Micro-LED arrays with a mesa size ranging from 7 to 100μm were prepared for display purposes.The luminance and external quantum efficiency(EQE)were measured and discussed.Surprisingly,micro-LED arrays with a smaller mesa size exhibit a higher EQE under 100 ns pulse duration operation when compared with longer pulse duration operations.Under certain short-pulsed excitation,a 7×7μm^(2)micro-LED array even exhibits a>20%higher EQE as compared to the direct current(DC)or the long duration pulse operation condition.We thus concluded that the notorious efficiency reduction induced by sidewall defects in small-sized micro-LED arrays could be significantly reduced by applying short-pulse voltages.

Water-driven photoluminescence reversibility in CsPbBr_(3)/PDMSPUa composite

Strong ionic character endows all-inorganic perovskite nanocrystals(NCs)with particular optoelectronic features when interacting with common polar solvents,such as water.However,the interaction mechanism of water affecting perovskite NCs is still lack of in-depth understanding.This study systematically explores the roles of water on CsPbBr_(3) nanocrystals(CNCs)by finely controlling the polymer coating degree of polydimethylsiloxane-based polyurea(PDMS-PUa).Through this coating,the effect of water on CNCs is found to experience from“fluorescence quenching”owing to irreversible crystal decomposition towards“forward fluorescence reversibility”by crystal destruction and recrystallization.With gradually enhanced coating,a phenomenon of“reverse fluorescence reversibility”is further observed in that water begins to passivate the CNCs’defect states.Finally,“fluorescent balance”can be achieved with a thick enough coating,where water can hardly contact with the CNCs.Inspired by the fluorescence reversible mechanism discovered,a new wearable intelligent sensing skin is demonstrated by using the CsPbBr_(3)/PDMS-PUa composite as raw material.Both water contact and humidity change can be perceived through photoluminescence(PL)intensity,corresponding to stimuli-responsive sensory nerves of human skin.It is expected that these findings will shed some new lights on perovskite NCs.

An Outbreak of Infections Caused by a Klebsiella pneumoniae ST11 Clone Coproducing Klebsiella pneumoniae Carbapenemase-2 and RmtB in a Chinese Teaching Hospital

Background： Klebsiellapneumoniae carbapenemase （KPC）-producing K. pneumoniae bacteria, which cause serious disease outbreaks worldwide, was rarely detected in Xiangya Hospital, prior to an outbreak that occurred from August 4, 2014, to March 17, 2015. The aim of this study was to analyze the epidemiology and molecular characteristics of the K. pneumoniae strains isolated during the outbreak. Methods： Nonduplicate carbapenem-resistant K. pneumoniae isolates were screened for blanc,＂ and multiple other resistance determinants using polymerase chain reaction. Subsequent studies included pulsed-field gel electrophoresis （PFGE）, multilocus sequence typing, analysis of plasmids, and genetic organization ofblaKPC-2 locus. Results： Seventeen blaKPC-2-positive K. pneumoniae were identified. A wide range of resistant determinants was detected. Most isolates （88.2%） coharbored blaKPC-2 and rmtB in addition to other resistance genes, including biaSHV-1, blaTEM-1, and aac（3）-lla. The blaKPC-2 and rmtB genes were located on the conjugative IncFIB-type plasmid. Genetic organization of blaKPC-2 locus in most strains was consistent with that of the plasmid pKP048. Four types （A l, A2, A3, and B） were detected by PFGE, and Type A1, an ST11, was the predominant PFGE type. A novel K. pneumoniae sequence type （ST1883） related to STI 1 was discovered. Conclusions： These isolates in our study appeared to be clonal and STI 1 K. pneumoniae was the predominant clone attributed to the outbreak. Coharbing of blaKPC-2 and rmtB, which were located on a transferable plasmid, in clinical K. pneumoniae isolates may lead to the emergence of a new pattern of drug resistance.

Graphdiyne as a novel nonactive anode for wastewater treatment:A theoretical study

Electrochemical oxidation of water to produce highly reactive hydroxyl radicals(·OH)is the dominant factor that accounts for the organic compounds removal efficiency in water treatment.As an emerging carbon-based material,the investigation of electrocatalytic of water to produce·OH on Graphdiyne(GDY)anode is firstly evaluated by using first-principles calculations.The theoretical calculation results demonstrated that the GDY anode owns a large oxygen evolution reaction(OER)overpotential(η^(OER)=1.95 V)and a weak sorptive ability towards oxygen evolution intermediates(HO^(*),not·OH).The high Gibbs energy change of HO^(*)(3.18 e V)on GDY anode makes the selective production of·OH(△G=2.4 eV)thermodynamically favorable.The investigation comprises the understanding of the relationship between OER to electrochemical advanced oxidation process(EAOP),and give a proof-of-concept of finding the novel and robust environmental EAOP anode at quantum chemistry level.