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Efficient and Stable Photoassisted Lithium-Ion Battery Enabled by Photocathode with Synergistically Boosted Carriers Dynamics

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Ma, Zelin wang, shiyao Ma, Zhuangzhuang Li, Juan Zhao, Luomeng Li, Zhihuan wang, Shiyuan Shuang, Yazhou wang, Jiulong wang, Fang Xia, Weiwei Jian, Jie He, Yibo wang, Junjie Guo, Pengfei wang, Hongqiang Northwestern Polytech Univ Ctr Nano Energy Mat State Key Lab Solidificat Proc Sch Mat Sci & Engn Xian 710072 Peoples R China NPU Shaanxi Joint Lab Graphene Xian 710072 Peoples R China Northwestern Polytech Univ Sch Mat Sci State Key Lab Solidificat Proc Xian 710072 Peoples R China Northwestern Polytech Univ Engn Dept Xian 710072 Peoples R China Northwestern Polytech Univ Ctr Adv Lubricat & Seal Mat Sch Mat Sci & Engn State Key Lab Solidificat Proc Xian 710072 Peoples R China Northwestern Polytech Univ Shenzhen Res & Dev Inst Shenzhen 518063 Peoples R China Shaanxi Normal Univ Key Lab Appl Surface & Colloid Chem Shaanxi Engn Lab Adv Energy Technol Shaanxi Key Lab Adv Energy DevicesSch Mat Sci & E Xian 710119 Peoples R China

Efficient and stable photocathodes with versatility are of significance in photoassisted lithium-ion batteries (PLIBs), while there is always a request on fast carrier transport in electrochemical active photocathodes. Present work proposes a general approach of creating bulk heterojunction to boost the carrier mobility of photocathodes by simply laser assisted embedding of plasmonic nanocrystals. When employed in PLIBs, it was found effective for synchronously enhanced photocharge separation and transport in light charging process. Additionally, experimental photon spectroscopy, finite difference time domain method simulation and theoretical analyses demonstrate that the improved carrier dynamics are driven by the plasmonic-induced hot electron injection from metal to TiO2, as well as the enhanced conductivity in TiO2 matrix due to the formation of oxygen vacancies after Schottky contact. Benefiting from these merits, several benchmark values in performance of TiO2-based photocathode applied in PLIBs are set, including the capacity of 276 mAh g(-1 ) at 0.2 A g(-1 )under illumination, photoconversion efficiency of 1.276% at 3 A g(-1 ), less capacity and Columbic efficiency loss even through 200 cycles. These results exemplify the potential of the bulk heterojunction strategy in developing highly efficient and stable photoassisted energy storage systems.

关键词： Photoassisted lithium-ion batteries Bulk heterojunction Carrier dynamics TiO2 nanofiber Plasmonic metal nanocrystals

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CasNet:A Cascade Coarse-to-Fine Network for Semantic Segmentation

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Tsinghua Science and Technology 2019年第2期24卷 207-215页

作者： Zhenyang wang Zhidong Deng shiyao wang Department of Computer Science Tsinghua University

Semantic segmentation is a fundamental topic in computer vision. Since it is required to make dense predictions for an entire image, a network can hardly achieve good performance on various kinds of scenes. In this paper, we propose a cascade coarse-to-fine network called CasNet, which focuses on regions that are difficult to make pixel-level labels. The CasNet comprises three branches. The first branch is designed to produce coarse predictions for easy-to-label pixel regions. The second one learns to distinguish the relatively difficult-to-label pixels from the entire image. Finally, the last branch generates final predictions by combining both the coarse and the fine prediction results through a weighting coefficient that is estimated by the second branch. Three branches focus on their own objectives and collaboratively learn to predict from coarse-to-fine predictions. To evaluate the performance of the proposed network, we conduct experiments on two public datasets: SIFT Flow and Stanford Background. We show that these three branches can be trained in an end-to-end manner, and the experimental results demonstrate that the proposed CasNet outperforms existing state-of-the-art models, and it achieves prediction accuracy of 91.6% and 89.7% on SIFT Flow and Standford Background, respectively.

关键词： semantic segmentation convolutional neural network hard negative mining

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Facile SERS screening of melamine in bovine milk with 2D printed AgNPs/glass fabric filter paper as the flexible substrate

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Food Science and Human Wellness 2024年第5期13卷 2595-2600页

作者： shiyao wang Yanan Zhao Xiao Wei Yisheng Chen College of Food Science and Engineering Shanxi Agricultural UniversityTaigu 030801China Food Nutrition and Safety Institute Shanxi Agricultural UniversityTaiyuan 030031China School of Food Science and Technology Jiangnan UniversityWuxi 214122China

Melamine is one of the most frequently detected adulterants in dairy *** current study proposes a surface-enhanced Raman spectroscopy(SERS)-based analytical tool for fast and reliable screening of melamine in bovine milk.A hand-held Raman spectrometer was used in conjunction with a substrate composed of silver nanoparticles(AgNPs)that was 2D printed onto glass fiber(GF)filter *** optimized conditions,a sensitive and fingerprint-like signal at 674 cm^(-1) was *** AgNPs/GF substrate exhibited high sensitivity to melamine in milk down to 1.9498×10^(-5)mg/mL,which is well below the USA and EU safety limits(2.5×10^(-3)mg/mL).Remarkably,the proposed technology was also highly reproducible,showing spot-to-spot and block-to-block variations below 3.3%and 4.9%at 674 cm^(-1) in Raman intensity,*** characteristic peak intensity and concentration of melamine showed an acceptable linear relationship(R^(2)=0.9909)within the range of 0.0001-1 mg/***,the method established in this study can provide an efficient and effective method for the quantitative target screening and detection of melamine in dairy products.

关键词： 2D print Melamine Milk Surface-enhanced Raman spectroscopy(SERS) flexible substrate

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Enhanced Cooling Efficiency of Urban Trees on Hotter Summer Days in 70 Cities of China

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Advances in Atmospheric Sciences 2024年第11期41卷 2259-2275页

作者： Limei YANG Jun GE Yipeng CAO Yu LIU Xing LUO shiyao wang Weidong GUO School of Atmospheric Sciences Nanjing UniversityNanjing 210023China Joint International Research Laboratory of Atmospheric and Earth System Sciences Nanjing UniversityNanjing 210023China Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing 210023China

Increasing the urban tree cover percentage(TCP) is widely recognized as an efficient way to mitigate the urban heat island effect. The cooling efficiency of urban trees can be either enhanced or attenuated on hotter days, depending on the physiological response of urban trees to rising ambient temperature. However, the response of urban trees' cooling efficiency to rising urban temperature remains poorly quantified for China's cities. In this study, we quantify the response of urban trees' cooling efficiency to rising urban temperature at noontime [~1330 LT(local time), LT=UTC+8] in 17summers(June, July, and August) from 2003–19 in 70 economically developed cities of China based on satellite observations. The results show that urban trees have stronger cooling efficiency with increasing temperature, suggesting additional cooling benefits provided by urban trees on hotter days. The enhanced cooling efficiency values of urban trees range from 0.002 to 0.055℃ %-1 per 1℃ increase in temperature across the selected cities, with larger values for the lowTCP-level cities. The response is also regulated by background temperature and precipitation, as the additional cooling benefit tends to be larger in warmer and wetter cities at the same TCP level. The positive response of urban trees' cooling efficiency to rising urban temperature is explained mainly by the stronger evapotranspiration of urban trees on hotter *** results have important implications for alleviating urban heat risk by utilizing urban trees, particularly considering that extreme hot days are becoming more frequent in cities under global warming.

关键词： urban trees cooling efficiency China's cities evapotranspiration summer hot days

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Dependence of sperm structural and functional integrity on testicular calcineurin isoform PPP3R2 expression

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Journal of Molecular Cell Biology 2020年第7期12卷 515-529页

作者： Yue Liu Chujun Zhang shiyao wang Yanqin Hu Jia Jing Luyao Ye Ran Jing Zhide Ding Department of Histology EmbryologyGenetics and Developmental BiologyShanghai Key Laboratory for Reproductive MedicineShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Clinical Medicine Shanghai Jiao Tong University School of MedicineShanghai 200025China

After leaving the testis,mammalian sperm undergo a sequential maturation process in the epididymis followed by capacitation during their movement through the female reproductive *** phenotypic changes are associated with modification of protein phosphorylation and membrane remodeling,which is requisite for sperm to acquire forward motility and induce ***,the molecular mechanisms underlying sperm maturation and capacitation are still not fully ***,we show that PPP3R2,a testis-specific regulatory subunit of protein phosphatase 3(an isoform of calcineurin in the testis),is essential for sperm maturation and *** of Ppp3r2 in mice leads to male sterility due to sperm motility impairment and morphological *** very noteworthy change includes increases in sperm membrane ***,PPP3R2 regulates sperm maturation and capacitation via(i)modulation of membrane diffusion barrier function at the annulus and(ii)facilitation of cholesterol efflux during sperm *** together,PPP3R2 plays a critical role in modulating cholesterol efflux and mediating the dynamic control of membrane remodeling during sperm maturation and capacitation.

关键词： cholesterol metabolism Ppp3r2 sperm deformity sperm motility sperm maturation

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Low levels of Bax inhibitor-1 gene expression increase tunicamycin-induced apoptosis in human neuroblastoma SY5Y cells

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Neural Regeneration Research 2012年第17期7卷 1331-1337页

作者： Dan Wu Peirong wang shiyao wang Department of Medical Genetics School of Basic Medical SciencesPeking UniversityBeijing 100191China Institute of Biophysics Chinese Academy of SciencesBeijing 100190China

A human SH-SY5Y neuroblastoma cell line with a low level of Bax inhibitor-1 expression was established by lentivirus-mediated RNA interference and fluorescence-activated cell sorting. In control SH-SY5Y cells, tunicamycin treatment induced endoplasmic reticulum stress-mediated apoptosis; however, after Bax inhibitor-1 gene knockdown, cell survival rates were significantly decreased and the degree of apoptosis was significantly increased following tunicamycin treatment In addition, chromatin condensation and apparent apoptotic phenomena, such as marginalization and cytoplasmic vesicles, were observed. Our findings indicate that Bax inhibitor-1 can delay apoptosis induced by endoplasmic reticulum stress.

关键词： Bax inhibitor-1 RNA interference SH-SY5Y endoplasmic reticulum stress tunicamycin apoptosis neural regeneration

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HPTLC-fluorescent densitometry for screening aflatoxin B1 in millet and buckwheat

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Food Science and Human Wellness 2024年

作者： Xudong Shi Xingjun Xi Yuetao Jia Zhijian wang Jiawei Guo shiyao wang Xiaoqian Tang Yisheng Chen College of Food Science and Engineering， Shanxi Agricultural University China National Institute of Standardization Key Laboratory of Detection for Mycotoxins， Ministry of Agriculture and Rural Affairs Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences

Given severe health-hazardous effects of aflatoxin B1 (AFB1) widely occurring in cereal grains and animal feeds， it is highly urgent to develop analytical methods for its rapid screening. In this work， we proposed a simple and high-throughput method for the determination of AFB1 in millet and buckwheat samples using high performance thin layer chromatography (HPTLC) linked to fluorescence densitometry. The first step was to optimize the solid-liquid extraction for the crude clean-up of the samples. The QuEChERS (Quick， Easy， Cheap， Effective， Robust and Safe) extraction strategy was used and different solvent systems for their extraction efficiency of AFB1 from the samples were evaluated. Then， trichloromethane/ethyl acetate (7/3， v/v) was used as the mobile phase to realize the separation of the targeted compound from background noises on silica gel plates. Quantification was readily performed with densitometry in fluorescence mode. In order to fix the optimal excitation wavelength， spectra scanning from 250-400 nm was carried out， revealing that 364 nm light gave the highest signal. With the optimized optical system， high sensitivity to AFB1 was achieved， with a limit of detection (LOD) at 3 μg/kg. Apart from that， good linearity (0.999) was obtained within the range of 1-80 ng/band of AFB1. To assess the analysis accuracy， two levels of AFB1 (50 and 100 μg/kg) were spiked into real grain samples. The obtained results showed that the recovery rates were within the range of (81.6–114.0)%. The proof-of-concept results of this work evidenced that HPTLC is a promising analytical tool for the screening of mycotoxin in difficult samples.

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Late onset of neutral lipid storage disease due to a rare PNPLA2 mutation in a patient with myopathy and cardiomyopathy

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Chinese Medical Journal 2022年第19期135卷 2389-2391页

作者： Ye Tian shiyao wang Fang wang Li Yi Mingrui Dong Xu Huang Department of Pulmonary and Critical Care Medicine Center of Respiratory MedicineChina-Japan Friendship HospitalNational Center for Respiratory MedicineInstitute of Respiratory MedicineChinese Academy of Medical SciencesNational Clinical Research Center for Respiratory DiseasesBejing 100029China Department of Cardiology China-Japan Friendship HospitalBeijing 100029China Department of Neurology China-Japan Friendship HospitalBeijing 100029China.

To the Editor:Neutral lipidd storage disease with myopathy(NLSDM)is a rare autosomal recessive disorder caused by mutations in the PNPLA2 *** gene encodes adipose triglyceride lipase(ATGL),an enzyme that catalyzes hydrolysis of triglycerides in mammalian adipose tissue and plays key roles in the function of lipid droplets(LDs).The results of many biochemical studies have revealed intracellular localization of ATGLwithLDs,but catalyticactivity iscompletely lost in the context of PNPLA2mutation.

关键词： myopathy rare cardiomyopathy

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分割市场与土地出让——理论与来自中国省际面板的证据

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中国经济问题 2016年第6期 14-23页

作者：金媛王世尧贵州财经大学金融学院贵州财经大学公共管理学院

地方政府作为土地市场上的独家垄断者,其行为逻辑符合经济理性。本文试图把不同土地出让市场土地需求弹性的差异作为最根本的外生变量,构建土地出让的独家垄断市场结构理论模型,并利用2004-2010年的省级面板数据进行验证。实证研究发现... 详细信息

地方政府作为土地市场上的独家垄断者,其行为逻辑符合经济理性。本文试图把不同土地出让市场土地需求弹性的差异作为最根本的外生变量,构建土地出让的独家垄断市场结构理论模型,并利用2004-2010年的省级面板数据进行验证。实证研究发现:土地需求弹性差异是地方政府土地出让行为选择的决定因素;未来省际间分割市场的定价差距将随着自身经济发展水平的提高、土地需求弹性的降低而逐步缩小,即表现为分割市场的定价差距与经济发展水平呈现"倒U型"变化规律;省区之间表现为发达省份土地出让市场分割弱化快,欠发达省份土地出让市场分割弱化慢的变化趋势。

关键词：土地出让方式选择分割市场差别定价地方政府行为需求弹性差异

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政府脱贫目标与农户行为选择偏差——理论与产业扶贫项目的经验证据

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财经研究 2019年第6期45卷 29-41页

作者：金媛王世尧贵州财经大学金融学院贵州贵阳550025 贵州财经大学公共管理学院贵州贵阳550025

中国的扶贫工作具有明显的政府主导性质,在2020年实现脱贫的强约束下,政府扶贫政策快速推进所产生的结果与扶贫政策制定的初衷是否一致呢?文章将脱贫目标下的政府干预纳入农户参与产业扶贫项目的行为选择分析框架,理论和实证的结果均显... 详细信息

中国的扶贫工作具有明显的政府主导性质,在2020年实现脱贫的强约束下,政府扶贫政策快速推进所产生的结果与扶贫政策制定的初衷是否一致呢?文章将脱贫目标下的政府干预纳入农户参与产业扶贫项目的行为选择分析框架,理论和实证的结果均显示,部分农户退出产业扶贫项目是基于自身效用最大化的理性选择。实证结果表明:(1)如果作物选种利用了内部边际土地,则有利于提高当地农户参与意愿和参与强度,这为自然禀赋条件缺乏的地区发展农业产业化提供了参考路径;(2)禀赋较差的农户被动参与产业扶贫项目可能面临较大的收入风险,因为产业扶贫项目的高风险给贫困户带来的效用损失降低了他们对致富项目的预期评价,贫困户因抗风险能力低而倾向于选择低风险、低预期收入的传统经营;(3)政府的干预在一定程度上降低了农户对土地租金以及劳动报酬变化的敏感性。在脱贫时间节点逼近的约束下,政府直接干预产业扶贫项目中的生产环节,可能会使良好的扶贫意愿与农户的行为选择产生偏差;而对贫困深度不同的地区制定差别化的脱贫考核标准,降低经济活动交易成本,才是扶贫绩效的帕累托改进。因此,政府在扶贫领域的干预是有边界的。

关键词：政府干预参与强度效用损失农户行为选择

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