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Controlling nanomaterial distribution and aggregation in thin-film nanocomposite membranes: Role of substrate pore's relative size with nanomaterials
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作者 Siyu Cao Yufei Shu +5 位作者 Li wang Qi Han Meng Zhang mengxia wang How Yong Ng Zhongying wang 《Chinese Chemical Letters》 2025年第10期524-531,共8页
Thin-film nanocomposite(TFN) membranes have garnered considerable attention for their potential to improve separation performance by incorporating nanomaterials. However, challenges such as these materials' uneven... Thin-film nanocomposite(TFN) membranes have garnered considerable attention for their potential to improve separation performance by incorporating nanomaterials. However, challenges such as these materials' uneven distribution and aggregation have hindered practical applications. While prior studies have largely concentrated on modifying nanosheets for compatibility with polymer matrices, the role of substrate pore size in influencing nanosheet distribution has been overlooked. In this work, MoS_(2) nanosheets were dispersed in an aqueous phase to fabricate TFN membranes, investigating the effect of substrate pore size relative to the nanosheets. By systematically varying the particle size of MoS_(2) and the pore size of the substrate, we reveal how these factors impact material distribution and structural uniformity within the membranes. Our findings reveal that larger substrate pores allow the MoS_(2)-containing monomer solution to infiltrate more effectively, minimizing nanosheet aggregation. This enhances membrane performance by promoting better dispersion. Our results underscore the importance of considering the relative size of substrate pores and nanosheets in TFN membrane design, providing a pathway to improved material integration and higher membrane efficiency. 展开更多
关键词 NANOFILTRATION Thin-film nanocomposite(TFN)membranes substrate Pore size AGGREGATION MoS_(2)nanosheet
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菲律宾海脊索动物多样性评估:基于OBIS数据库 被引量:2
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作者 王梦霞 陈心怡 +2 位作者 张洁 宋宇航 杨娟 《生物多样性》 CAS CSCD 北大核心 2021年第11期1481-1489,共9页
菲律宾海邻近全球生物多样性和进化的中心,分布着多种重要生物资源。了解本区生物多样性及受威胁物种的分布特征可对掌握其生物多样性现状,以及未来实施有效的生物多样性保护管理策略提供重要依据。本文利用海洋生物地理信息系统(Ocean ... 菲律宾海邻近全球生物多样性和进化的中心,分布着多种重要生物资源。了解本区生物多样性及受威胁物种的分布特征可对掌握其生物多样性现状,以及未来实施有效的生物多样性保护管理策略提供重要依据。本文利用海洋生物地理信息系统(Ocean Biogeographic Information System, OBIS)数据库,并参考世界自然保护联盟濒危物种红色名录(IUCN Redlist)的物种濒危程度评估结果,构建了菲律宾海脊索动物生物多样性和受威胁物种数据库,结合海洋生态因子特征对该海区脊索动物的物种多样性和不同等级受威胁物种的数量空间分布格局进行了初步分析,并对脊索动物不同分类阶元生物多样性与生态因子的关系进行了相关性分析。结果表明,本区海洋脊索动物门已报道11纲56目320科1,171属2,876种。其中在菲律宾海的边缘区域,特别是菲律宾群岛、台湾岛、日本群岛、马里亚纳群岛及中央的九州–帕劳海脊附近海域,生物多样性水平相对较高,而中央海盆区的生物多样性较低。本海域鱼类生物多样性尤其丰富,共计4纲45目292科1,105属2,768种,在物种水平上占本区脊索动物物种数的96%。各分类阶元水平的多样性与初级生产力呈显著正相关,而与水深呈显著负相关。本区脊索动物门受威胁物种共计54种,其中极危3种、濒危5种、易危22种、近危24种,分别约占全区脊索动物总种数的0.10%、0.17%、0.76%、0.83%。与本区生物多样性分布格局相似,受威胁物种多分布于菲律宾海边缘区域,在中央海脊和深水盆地区域分布较少。本研究表明,对菲律宾海脊索动物特别是受威胁物种的保护应当以边缘区域优先;但考虑到当前菲律宾海深海区域生物多样性数据的不足,也应加强对中央海脊和深水盆地等区域的生物多样性普查。 展开更多
关键词 海洋生物地理信息系统 菲律宾海 脊索动物门 生物多样性 受威胁物种
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The power of“controllers”:Transposon-mediated duplicated genes evolve towards neofunctionalization 被引量:1
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作者 Huijing Ma mengxia wang +1 位作者 Yong E.Zhang Shengjun Tan 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2023年第7期462-472,共11页
Since the discovery of the first transposon by Dr.Barbara McClintock,the prevalence and diversity of transposable elements(TEs)have been gradually recognized.As fundamental genetic components,TEs drive organismal evol... Since the discovery of the first transposon by Dr.Barbara McClintock,the prevalence and diversity of transposable elements(TEs)have been gradually recognized.As fundamental genetic components,TEs drive organismal evolution not only by contributing functional sequences(e.g.,regulatory elements or“controllers”as phrased by Dr.McClintock)but also by shuffling genomic sequences.In the latter respect,TE-mediated gene duplications have contributed to the origination of new genes and attracted extensive interest.In response to the development of this field,we herein attempt to provide an overview of TEmediated duplication by focusing on common rules emerging across duplications generated by different TE types.Specifically,despite the huge divergence of transposition machinery across TEs,we identify three common features of various TE-mediated duplication mechanisms,including end bypass,template switching,and recurrent transposition.These three features lead to one common functional outcome,namely,TE-mediated duplicates tend to be subjected to exon shuffling and neofunctionalization.Therefore,the intrinsic properties of the mutational mechanism constrain the evolutionary trajectories of these duplicates.We finally discuss the future of this field including an in-depth characterization of both the duplication mechanisms and functions of TE-mediated duplicates. 展开更多
关键词 Transposable elements Gene duplication New gene origination End bypass Template switching Exon shuffling NEOFUNCTIONALIZATION Mutational constraint
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Consensus on potential biomarkers developed for use in clinical tests for schizophrenia 被引量:2
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作者 Ping Lin Junyu Sun +22 位作者 Xiaoyan Lou Dan Li Yun Shi Zhenhua Li Peijun Ma Ping Li Shuzi Chen Weifeng Jin Shuai Liu Qing Chen Qiong Gao Lili Zhu Jie Xu Mengyuan Zhu mengxia wang Kangyi Liang Ling Zhao Huabin Xu Ke Dong Qingtian Li Xunjia Cheng Jinghong Chen Xiaokui Guo 《General Psychiatry》 CSCD 2022年第1期42-52,共11页
Background Schizophrenia is a serious mental illness affecting approximately 20 million individuals globally.Both genetic and environmental factors contribute to the illness.If left undiagnosed and untreated,schizophr... Background Schizophrenia is a serious mental illness affecting approximately 20 million individuals globally.Both genetic and environmental factors contribute to the illness.If left undiagnosed and untreated,schizophrenia results in impaired social function,repeated hospital admissions,reduced quality of life and decreased life expectancy.Clinical diagnosis largely relies on subjective evidence,including self-reported experiences,and reported behavioural abnormalities followed by psychiatric evaluation.In addition,psychoses may occur along with other conditions,and the symptoms are often episodic and transient,posing a significant challenge to the precision of diagnosis.Therefore,objective,specific tests using biomarkers are urgently needed for differential diagnosis of schizophrenia in clinical practice.Aims We aimed to provide evidence-based and consensus-based recommendations,with a summary of laboratory measurements that could potentially be used as biomarkers for schizophrenia,and to discuss directions for future research.Methods We searched publications within the last 10 years with the following keywords:‘schizophrenia’,‘gene’,‘inflammation’,‘neurotransmitter’,‘protein marker’,‘gut microbiota’,‘pharmacogenomics’and‘biomarker’.A draft of the consensus was discussed and agreed on by all authors at a round table session.Results We summarised the characteristics of candidate diagnostic markers for schizophrenia,including genetic,inflammatory,neurotransmitter,peripheral protein,pharmacogenomic and gut microbiota markers.We also proposed a novel laboratory process for diagnosing schizophrenia in clinical practice based on the evidence summarised in this paper.Conclusions Further efforts are needed to identify schizophrenia-specific genetic and epigenetic markers for precise diagnosis,differential diagnosis and ethnicity-specific markers for the Chinese population.The development of novel laboratory techniques is making it possible to use these biomarkers clinically to diagnose disease. 展开更多
关键词 DIAGNOSIS SCHIZOPHRENIA IMPAIRED
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Corrigendum to‘The power of“controllers”:Transposon-mediated duplicated genes evolve towards neofunctionalization’[Journal of Genetics and Genomics(2023)50,462–472]
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作者 Huijing Ma mengxia wang +1 位作者 Yong E.Zhang Shengjun Tan 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2024年第1期109-109,共1页
This corrigendum clarifies information in the review‘The power of“controllers”:Transposon-mediated duplicated genes evolve towards neofunctionalization’by Ma et al.(2023).The word“controllers”throughout the pape... This corrigendum clarifies information in the review‘The power of“controllers”:Transposon-mediated duplicated genes evolve towards neofunctionalization’by Ma et al.(2023).The word“controllers”throughout the paper should be corrected into“controlling elements”:1.The title‘The power of“controllers”:Transposon-mediated duplicated genes evolve towards neofunctionalization’should be corrected into‘The power of“controlling elements”:Transposon-mediated duplicated genes evolve towards neofunctionalization’. 展开更多
关键词 controllers POWER evolve
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Study on Approach of Static Security Assessment Accounting for Electro-thermal Coupling
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作者 mengxia wang Hongbin Sun +1 位作者 Jinxin Huang Qiang Zhang 《Energy and Power Engineering》 2013年第4期703-707,共5页
A static security assessment approach considering electro-thermal coupling of transmission lines is proposed in this paper. Combined with the dynamic thermal rating technology and energy forecasting, the approach can ... A static security assessment approach considering electro-thermal coupling of transmission lines is proposed in this paper. Combined with the dynamic thermal rating technology and energy forecasting, the approach can track both the electrical variables and transmission lines’ temperature varying trajectory under anticipated contingencies. Accordingly, it identifies the serious contingencies by transmission lines’ temperature violation rather than its power flow, in this case the time margin of temperature rising under each serious contingency can be provided to operators as warning information and some unnecessary security control can also be avoided. Finally, numerical simulations are carried out to testify the validity of the proposed approach. 展开更多
关键词 Power System Dynamic THERMAL RATING STATIC Security Assessment Transmission Line Electro-thermal COUPLING
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中国社会治理政策的量化评价——基于2000—2024年的政策样本
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作者 张少峰 李婉 +1 位作者 王希龙 王萌霞 《中国公共政策评论》 2025年第1期213-234,共22页
社会治理政策的有效推进在提升城乡社会精细化服务水平、推动共建共治共享的社会治理新格局中发挥着关键作用。本文基于2000—2024年中共中央及政府相关部门颁布的89项社会治理政策文本,结合政策特点、高频词汇及关键词,构建政策建模一... 社会治理政策的有效推进在提升城乡社会精细化服务水平、推动共建共治共享的社会治理新格局中发挥着关键作用。本文基于2000—2024年中共中央及政府相关部门颁布的89项社会治理政策文本,结合政策特点、高频词汇及关键词,构建政策建模一致性(PMC)指数模型,包含9个一级变量和41个二级变量。选择11项典型政策,应用文本挖掘分析各维度得分并绘制PMC曲面。结果表明,11项政策中有9项达到优秀水平,2项处于可接受水平。本文通过对多投入产出表与PMC指数的综合评价,分析各项政策的优势与薄弱环节,为进一步优化社会治理政策提供理论支持和实践借鉴。 展开更多
关键词 社会治理 PMC指数模型 政策效果评估 量化评价
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Two-dimensional tellurene nanosheets as saturable absorber of passively Q-switched Nd:YAG solid-state laser 被引量:4
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作者 Tianhong Tang Fang Zhang +2 位作者 mengxia wang Zhengping wang Xinguang Xu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第4期26-31,共6页
For the first time,a group-Ⅵsingle element nanomaterial was used as the optical saturable absorber(SA)to generate laser pulses.With two-dimensional(2D)tellurene as a passive Q-switch,1.06μm and 1.3μm pulse laser op... For the first time,a group-Ⅵsingle element nanomaterial was used as the optical saturable absorber(SA)to generate laser pulses.With two-dimensional(2D)tellurene as a passive Q-switch,1.06μm and 1.3μm pulse laser operations were realized from a diode-pumped Nd:YAG crystal.The shortest pulse widths were 98 ns and 178 ns,and the highest peak powers were 2.68 W and 2.45 W,respectively.Our research determines that tellurene is an excellent SA material in the near-infrared region. 展开更多
关键词 tellurene NANOSHEETS ABSORBER GRAPHENE passive Q-switching
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Bayesian Network Based Imprecise Probability Estimation Method for Wind Power Ramp Events 被引量:2
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作者 Yuanchun Zhao Wenli Zhu +1 位作者 Ming Yang mengxia wang 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2021年第6期1510-1519,共10页
Although wind power ramp events(WPREs)are relatively scarce,they can inevitably deteriorate the stability of power system operation and bring risks to the trading of electricity market.In this paper,an imprecise condi... Although wind power ramp events(WPREs)are relatively scarce,they can inevitably deteriorate the stability of power system operation and bring risks to the trading of electricity market.In this paper,an imprecise conditional probability estimation method for WPREs is proposed based on the Bayesian network(BN)theory.The method uses the maximum weight spanning tree(MWST)and greedy search(GS)to build a BN that has the highest fitting degree with the observed data.Meanwhile,an extended imprecise Dirichlet model(IDM)is developed to estimate the parameters of the BN,which quantificationally reflect the ambiguous dependencies among the random ramp event and various meteorological variables.The BN is then applied to predict the interval probability of each possible ramp state under the given meteorological conditions,which is expected to cover the target probability at a specified confidence level.The proposed method can quantify the uncertainty of the probabilistic ramp event estimation.Meanwhile,by using the extracted dependencies and Bayesian rules,the method can simplify the conditional probability estimation and perform reliable prediction even with scarce samples.Test results on a real wind farm with three-year operation data illustrate the effectiveness of the proposed method. 展开更多
关键词 Bayesian network(BN) conditional probability imprecise Dirichlet model(IDM) imprecise probability wind power ramp events
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Broadband 1T-polytype tantalum disulfide saturable absorber for solid-state bulk lasers 被引量:1
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作者 mengxia wang HAILONG QIU +11 位作者 TIANWEN YANG ZHENGPING wang CHUANRUI ZHAO YUANAN ZHAO TING YU YUYAO JIANG MEILING CHEN YAFEI LIAN GE ZHANG HONGJUN LIU ZHANGGUI HU JIANDA SHAO 《Photonics Research》 SCIE EI CAS CSCD 2022年第9期2122-2132,共11页
1T-polytype tantalum disulfide(1T-TaS_(2)),an emerging strongly correlated material,features a narrow bandgap of 0.2 e V,bridging the gap between zero-bandgap graphene and large-bandgap 2D nonlinear optical(NLO)materi... 1T-polytype tantalum disulfide(1T-TaS_(2)),an emerging strongly correlated material,features a narrow bandgap of 0.2 e V,bridging the gap between zero-bandgap graphene and large-bandgap 2D nonlinear optical(NLO)materials.Combined with its intense light absorption,high carrier concentration,and high mobility,1T-TaS_(2) shows considerable potential for applications in broadband optoelectronic devices.However,its NLO characteristics and related applications have rarely been explored.Here,1T-TaS_(2) nanosheets are prepared by chemical vapor deposition.The ultrafast carrier dynamics in the 400–1100 nm range and broadband NLO performance in the 515–2500 nm range are systematically studied using femtosecond lasers.An obvious saturable absorption phenomenon is observed in the visible to IR range.The nonlinear absorption coefficient is measured to be-22.60±0.52 cm MW-1under 1030 nm,which is larger than that of other typical 2D saturable absorber(SA)materials(graphene,black phosphorus,and MoS_(2))under similar experimental conditions.Based on these findings,using 1T-TaS_(2) as a new SA,passively Q-switched laser operations are successfully performed at 1.06,1.34,and 1.94μm.The results highlight the promise of 1T-TaS_(2) for broadband optical modulators and provide a potential candidate material system for mid-IR nonlinear optical applications. 展开更多
关键词 saturable switched ABSORBER
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Modelling the Ecological Suitability of the Chagas Disease Vector Triatoma rubrofasciata—China 被引量:1
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作者 Yunhai Guo Yunliang Shi +3 位作者 Yi Zhang Yuanyuan Li mengxia wang Qin Liu 《China CDC weekly》 2021年第35期736-740,I0001,共6页
Summary What is already known on this topic?Triatoma rubrofasciata is a potential vector that can transmit American trypanosomiasis and was widely recorded in South of China.What is added by this report?Because of the... Summary What is already known on this topic?Triatoma rubrofasciata is a potential vector that can transmit American trypanosomiasis and was widely recorded in South of China.What is added by this report?Because of the low density of the triatomines,more habitats have not been discovered.This study mainly focused on predicting the geographical distribution of T.rubrofasciata under current and future climatic conditions in China using the MaxEnt model. 展开更多
关键词 ECOLOGICAL China. TRI
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Passively Q-switched self-frequency doubling Nd3+:ReCa4O(BO3)3(Re=Y,Gd) lasers with tin diselenide as a saturable absorber
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作者 Yuxiang Sun mengxia wang +5 位作者 Xinle wang Ying Zhou Bo wang Zhengping wang Fapeng Yu Xinguang Xu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2019年第6期45-48,共4页
With tin diselenide(SnSe2)film as a saturable absorber(SA),the passively Q-switched self-frequency doubling(SFD)lasers were realized in Nd^3+:ReCa4O(BO3)3(Re=Y,Gd)crystals.For Nd:YCa4O(BO3)3 crystal,the maximum averag... With tin diselenide(SnSe2)film as a saturable absorber(SA),the passively Q-switched self-frequency doubling(SFD)lasers were realized in Nd^3+:ReCa4O(BO3)3(Re=Y,Gd)crystals.For Nd:YCa4O(BO3)3 crystal,the maximum average output power at 532 nm was 19.6 mW,and the corresponding pulse repetition frequency,pulse duration,single pulse energy,and peak power were 17.6 kHz,91.9 ns,1.1μJ,and 12.1 W,respectively.For Nd:GdCa4 O(BO3)3 crystal,these values were 14.5 mW,22.1 kHz,48.7 ns,0.66μJ,and 13.5 W. 展开更多
关键词 With TIN DISELENIDE the passively Q-SWITCHED 0.66μJ and 13.5 W.
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Graphitic carbon nitride, a saturable absorber material for the visible waveband
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作者 mengxia wang FUKUN MA +3 位作者 ZHENGPING wang DAWEI HU XINGUANG XU XIAOPENG HAO 《Photonics Research》 SCIE EI 2018年第4期307-313,共7页
For the first time to our knowledge, graphitic carbon nitride(g-C_3N_4) nanosheets are found to be an excellent saturable absorber material in the visible waveband. g-C_3N_4 exhibits much stronger saturable absorption... For the first time to our knowledge, graphitic carbon nitride(g-C_3N_4) nanosheets are found to be an excellent saturable absorber material in the visible waveband. g-C_3N_4 exhibits much stronger saturable absorption in this region than in the near-infrared region, unlike other two-dimensional materials such as graphene and black phosphorus. By the Z-scan method, the nonlinear absorption coefficient β of the material is first measured at three visible wavelengths, and for g-C_3N_4 it is -2.05,-0.34, and -0.11 cm · GW^(-1) at 355, 532, and 650 nm,respectively. These are much larger than -0.06 cm · GW^(-1) at 1064 nm. 展开更多
关键词 石墨烯 氮化物 通讯技术 材料性能
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976 nm continuous-wave laser damage of Er:CaF_(2) crystals
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作者 Haiyang wang mengxia wang +7 位作者 Zhen Zhang Yuanan Zhao Dawei Li Kun Shuai Hailong Qiu Zhonghan Zhang Liangbi Su Jianda Shao 《High Power Laser Science and Engineering》 CSCD 2024年第5期97-105,共9页
Er:CaF_(2) crystals are crucial gain media for producing 3μm mid-infrared (MIR) lasers pumped by 976 nm continuouswave (CW) lasers owing to their low phonon energy and high conversion efficiency.This study investigat... Er:CaF_(2) crystals are crucial gain media for producing 3μm mid-infrared (MIR) lasers pumped by 976 nm continuouswave (CW) lasers owing to their low phonon energy and high conversion efficiency.This study investigated the damage characteristics and mechanism of Er:CaF_(2) crystals irradiated with a 976 nm CW laser.The laser-induced damage threshold of Er:CaF_(2) crystals with different Er^(3+) doping levels was tested;the damage morphology consists of a series of regular 70? cracks related to the angle of the crystal slip system on the surface.A finite-element model was used to calculate the temperature and stress fields of the crystals.The results indicated that the damage can be attributed to surface tensile stresses caused by the temperature gradient,and crystals with higher doping concentrations were more susceptible to damage owing to stronger light absorption.These findings provide valuable insights into the development of high-power MIR lasers. 展开更多
关键词 continuous-wave laser-induced damage Er:CaF_(2) mid-infrared laser thermal stress
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