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Novel Scheme for Narrow Band Fiber Filter System

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Chinese Journal of Lasers 1996年第5期B5卷 467-469页

作者： ZHAO Yucheng JIAN Shuisheng WANG wei tian Wenqiang (Northern Jiaotong Unviversity, Institute of Lightwave technology, Beijing 100044, China) Northern Jiaotong Univ Beijing China

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关键词： grsting in fibers optical filters

Comparison of the clinical performance of i-gel and Ambu laryngeal masks in anaesthetised paediatric patients:A meta-analysis

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World Journal of Clinical Cases 2022年第4期10卷 1242-1254页

作者： Di Bao Yun Yu wei Xiong Ya-xin Wang Yi Liang Lu Li Bin Liu Xu Jin Department of Anesthesiology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China

BACKGROUND Paediatric supraglottic airway devices(SGAs)are widely used in routine anaesthesia and serve as primary or back-up devices for difficult airway *** inflatable Ambu laryngeal masks and non-inflatable i-gel are two improvements of SGAs based on classic laryngeal *** clinical performance and safety of these two devices in paediatric patients are still unclear and warrant further *** To perform a systematic review and meta-analysis on the clinical performance and safety of Ambu laryngeal masks and i-gel in anaesthetised paediatric *** MEDLINE,Embase,Web of Science and Cochrane Central Register of Controlled Trials were searched from inception dates to April *** identified published randomised controlled trials(RCTs)in which the intervention involved the use of Ambu laryngeal masks and i-gel in anaesthetised paediatric patients(age<18 years).We assessed the oropharyngeal leak pressure(OLP)as the primary *** secondary outcomes were insertion time,success rate of insertion on the first attempt,and incidence of adverse *** After searching for all relevant trials published up to April 2020,data from seven RCTs with a total of 667 paediatric patients(323 and 344 participants in the i-gel and Ambu groups,respectively)were *** mean OLP in anaesthetised paediatric patients was lower in the Ambu group[21.82 cmH2O for Ambu vs 23.98 cmH2O for i-gel,P=0.003,95%confidence interval(CI):-3.58 to-0.75,I2=68%,Mantel-Haenszel random model].We did not find any clear evidence of differences between the devices in terms of insertion time,success rate of insertion,and incidence of adverse events except for blood staining(risk ratio 5.86,95%CI:1.76 to 19.46,P=0.004,I2=0,fixed-effect model).CONCLUSION The i-gel airway may provide a better seal and is therefore probably more suitable than the Ambu laryngeal mask airway in anaesthetised paediatric ***,the evidence is insufficient to allow making f

关键词： I-gel Ambu laryngeal masks Pediatric Clinical performance

Soil CO_2 Flux in Different Types of Forests Under a Subtropical Microclimatic Environment

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Pedosphere 2014年第2期24卷 243-250页

作者： YAN Wen-De XU Wang-Ming CHEN Xiao-Yong tian Da-Lun PENG Yuan-Ying ZHEN wei ZHANG Cao XU Jie Forest Ecology Program College of Life Science and TechnologyCentral South University of Forestry and Technology National Engineering Laboratory for Applied Forest Ecological Technology in Southern China State Forestry Administration of China Division of Science College of Arts and SciencesGovernors State UniversityUniversity Park Natural Sciences Division College of DuPage

The flux of carbon dioxide （CO2） from soil surface presents an important component of carbon （C） cycle in terrestrial ecosystems and is controlled by a number of biotic and abiotic factors. In order to better understand characteristics of soil CO2 flux （FCO2） in subtropical forests, soil FCO2 rates were quantified in five adjacent forest types （camphor tree forest, Masson pine forest, mixed camphor tree and Masson pine forest, Chinese sweet gum forest, and slash pine forest） at the tianjiling National Park in Changsha, Hunan Province, in subtropical China, from January to December 2010. The influences of soil temperature （Tsoil）, volumetric soil water content （0soiI）, soil pH, soil organic carbon （SOC） and soil C/nitrogen （N） ratio on soil FCO2 rates were also investigated. The annual mean soil FCO2 rate varied with the forest types. The soil FCO2 rate was the highest in the camphor tree forest （3.53 ± 0.51 μmol m-2 s-I）, followed by, in order, the mixed, Masson pine, Chinese sweet gum, and slash pine forests （1.53 ± 0.25 μmol m-2 sl）. Soil FCO2 rates from the five forest types followed a similar seasonal pattern with the maximum values occurring in summer （July and August） and the minimum values during winter （December and January）. Soil FCO2 rates were correlated to Tsoil and 0soil, but the relationships were only significant for Tsoil. No correlations were found between soil FCO2 rates and other selected soil properties, such as soil pH, SOC, and C/N ratio, in the examined forest types. Our results indicated that soil FCO2 rates were much higher in the evergreen broadleaved forest than coniferous forest under the same microclimatic environment in the study region.

关键词： broadleaved forest carbon coniferous forest soil temperature soil water content

神经网络工况识别的混合动力电动汽车模糊控制策略

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控制理论与应用 2011年第3期28卷 363-369页

作者：田毅张欣张良张昕北京交通大学机械与电子控制工程学院北京100044

采用模糊控制可以改进混合动力电动汽车(HEV)的燃油经济性和排放性,但是对模糊控制器进行优化时通常只针对某一典型工况.不同的城市的行驶工况有一定差别,影响了模糊控制改善混合动力电动汽车性能的效果.研究中以广州和上海市主干道行... 详细信息

采用模糊控制可以改进混合动力电动汽车(HEV)的燃油经济性和排放性,但是对模糊控制器进行优化时通常只针对某一典型工况.不同的城市的行驶工况有一定差别,影响了模糊控制改善混合动力电动汽车性能的效果.研究中以广州和上海市主干道行驶工况为例,首先建立了一个模糊控制策略,并采用遗传算法,以汽车燃油经济性和排放性为优化目标,分别针对广州和上海主干道行驶工况对模糊控制器中隶属度函数进行优化.然后建立了一个基于模糊神经网络的行驶工况识别方法,通过识别广州和上海的主干道行驶工况,对控制策略中模糊控制器的隶属度参数进行相应调整,结果证明采用模糊神经网络识别行驶工况的HEV模糊控制策略可以进一步提高汽车的燃油经济性和排放性能.

关键词：混合动力汽车行驶工况模糊控制神经网络遗传算法

Origin,discovery,exploration and development status and prospect of global natural hydrogen under the background of“carbon neutrality”

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China Geology 2022年第4期5卷 722-733页

作者： Qian-ning tian Shu-qing Yao Ming-juan Shao wei Zhang Hai-hua Wang Geoscience Documentation Center China Geological SurveyMinistry of Natural ResourcesBeijing 100083China National Geological Library of Chin1 2eijing 100083China

Global energy structure is experiencing the third transition from fossil energy to non-fossil energy,to solve future energy problems,cope with climate change,and achieve net-zero emissions targets by *** is considered to be the most potential clean energy in this century under the background of carbon *** present,the industrial methods for producing hydrogen are mainly by steam-hydrocarbon(such as coal and natural gas)reforming and by electrolysis of water,while the exploration and development of natural hydrogen had just *** to this literature review:(1)Natural hydrogen can be divided into three categories,including free hydrogen,hydrogen in inclusions and dissolved hydrogen;(2)natural hydrogen could be mainly from abiotic origins such as by deep-seated hydrogen generation,water-rock reaction or water radiolysis;(3)natural hydrogen is widely distributed and presents great potential,and the potential natural hydrogen sources excluding deep source of hydrogen is about(254±91)×10^(9) m^(3)/a according to a latest estimate;(4)at present,natural hydrogen has been mined in Mali,and the exploration and development of natural hydrogen has also been carried out in Australia,Brazil,the United States and some European countries,to find many favorable areas and test some technical methods for natural hydrogen *** hydrogen is expected to be an important part of hydrogen energy production in the future energy *** on a thorough literature review,this study introduced the origin,classification,and global discovery of natural hydrogen,as well as summarized the current global status and discussed the possibility of natural hydrogen exploration and development,aiming to provide reference for the future natural hydrogen exploration and development.

关键词： Carbon neutrality Energy transition New energy Hydrogen energy Natural hydrogen Occurrence Genesis Resources Exploration and development Potential

Au core-PtAu alloy shell nanowires for formic acid electrolysis

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Journal of Energy Chemistry 2022年第2期31卷 94-102页

作者： Qi Xue xin-Yu Bai Yue Zhao Ya-Nan Li tian-Jiao Wang Hui-Ying Sun Fu-Min Li Pei Chen Pujun Jin Shi-Bin Yin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(MOE)Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710062ShaanxiChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina

Inefficient electrocatalysts and high-power consumption are two thorny problems for electrochemical hydrogen(H2)production from acidic water *** we report the one-pot precise synthesis of ultrafine Au core-Pt Au alloy shell nanowires(Au@PtxAu UFNWs).Among them,Au@Pt_(0.077) Au UFNWs exhibit the best performance for formic acid oxidation reaction(FAOR)and hydrogen evolution reaction(HER),which only require applied potentials of 0.29 V and-22.6 m V to achieve a current density of 10 m A cm^(-2),*** corresponding formic acid electrolyzer realizes the electrochemical H2 production at a voltage of only 0.51 V with 10 m A cm^(-2) current *** functional theory(DFT)calculations reveal that the Au-riched Pt Au alloy structure can facilitates the direct oxidation pathway of FAOR and consequently elevates the FAOR activity of Au@Pt_(0.077) Au *** work provides meaningful insights into the electrochemical H_(2) production from both the construction of advanced bifunctional electrocatalysts and the replacement of OER.

关键词： Au core-PtAu alloy shell nanowires Formic acid oxidation reaction Reaction pathway Hydrogen evolution reaction Acidic water electrolysis

Chemical inhibition of Arabidopsis PIN-FORMED auxin transporters by the anti-inflammatory drug naproxen

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Plant Communications 2023年第6期4卷 234-243页

作者： Jing Xia Mengjuan Kong Zhisen Yang Lianghanxiao Sun Yakun Peng Yanbo Mao Hong wei wei Ying Yongxiang Gao Jiri Friml Jianping Weng xin Liu Linfeng Sun Shutang Tan MOE Key Laboratory for Cellular Dynamics Hefei National Laboratory for Physical Sciences at the MicroscaleThe First Affiliated Hospital of USTCBiomedical Sciences and Health Laboratory of Anhui ProvinceDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230027China Institute of Science and Technology Austria(ISTA) Am Campus 13400 KlosterneuburgAustria Center for Advanced Interdisciplinary Science and Biomedicine of IHM Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230027China

The phytohormone auxin plays central roles in many growth and developmental processes in *** of chemical tools targeting the auxin pathway is useful for both plant biology and *** we reveal that naproxen,a synthetic compound with anti-inflammatory activity in humans,acts as an auxin transport inhibitor targeting PIN-FORMED(PIN)transporters in *** experiments indicate that exogenous naproxen treatment affects pleiotropic auxin-regulated developmental *** cellular and biochemical evidence indicates that naproxen suppresses auxin transport,specifically PIN-mediated auxin ***,biochemical and structural analyses confirm that naproxen binds directly to PIN1 protein via the same binding cavity as the indole-3-acetic acid ***,by combining cellular,biochemical,and structural approaches,this study clearly establishes that naproxen is a PIN inhibitor and elucidates the underlying *** use of this compound may advance our understanding of the molecular mechanisms of PIN-mediated auxin transport and expand our toolkit in auxin biology and agriculture.

关键词： auxin transport PIN naproxen Arabidopsis NPA

Optimization of sensing time and cooperative user allocation for OR-rule cooperative spectrum sensing in cognitive radio network

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Journal of Central South University 2015年第7期22卷 2646-2654页

作者：刘鑫仲伟志陈琨奇 College of Astronautics Nanjing University of Aeronautics and Astronautics

In order to improve the throughput of cognitive radio(CR), optimization of sensing time and cooperative user allocation for OR-rule cooperative spectrum sensing was investigated in a CR network that includes multiple users and one fusion center. The frame structure of cooperative spectrum sensing was divided into multiple transmission time slots and one sensing time slot consisting of local energy detection and cooperative overhead. An optimization problem was formulated to maximize the throughput of CR network, subject to the constraints of both false alarm probability and detection probability. A joint optimization algorithm of sensing time and number of users was proposed to solve this optimization problem with low time complexity. An allocation algorithm of cooperative users was proposed to preferentially allocate the users to the channels with high utilization probability. The simulation results show that the significant improvement on the throughput can be achieved through the proposed joint optimization and allocation algorithms.

关键词： cognitive radio energy detection cooperative spectrum sensing throughput optimization

Changes in concentrations and transcripts of plant hormones in wheat seedling roots in response to Fusarium crown rot

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The Crop Journal 2023年第5期11卷 1441-1450页

作者： Yutian Gao Xuejun tian weidong Wang Xiangru Xu Yuqing Su Jiatian Yang Shuonan Duan Jinlong Li Mingming xin Huiru Peng Qixin Sun Chaojie Xie Jun Ma College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China Institute of Biotechnology and Food Science Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051HebeiChina

Fusarium crown rot(FCR) is a soilborne disease causing severe yield losses in many wheat-growing areas of the world. Diseased plants show browning and necrosis of roots and stems causing white heads at maturity. Little is known about the molecular processes employed by wheat roots to respond to the disease. We characterized morphological, transcriptional and hormonal changes in wheat seedling roots following challenge with Fusarium pseudograminearum(Fp), the main pathogen of FCR. The pathogen inhibited root development to various extents depending on plants' resistance level. Many genes responsive to FCR infection in wheat roots were enriched in plant hormone pathways. The contents of compounds involved in biosynthesis and metabolism of jasmonic acid, salicylic acid, cytokinin and auxin were drastically changed in roots at five days post-inoculation. Presoaking seeds in methyl jasmonate for 24 h promoted FCR resistance, whereas presoaking with cytokinin 6-benzylaminopurine made plants more susceptible. Overexpression of TaOPR3, a gene involved in jasmonic acid biosynthesis, enhanced plant resistance as well as root and shoot growth during infection.

关键词： Fusarium crown rot(FCR) Wheat Hormone Root TaOPR3