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An Environment‑Tolerant Ion‑Conducting Double‑Network Composite Hydrogel for High‑Performance Flexible Electronic Devices

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Nano-Micro Letters 2024年第5期16卷 352-369页

作者： Wenchao Zhao Haifeng Zhou wenkang li Manlin Chen Min Zhou Long Zhao State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

High-performance ion-conducting hydrogels(ICHs)are vital for developing flexible electronic ***,the robustness and ion-conducting behavior of ICHs deteriorate at extreme tempera-tures,hampering their use in soft *** resolve these issues,a method involving freeze–thawing and ionizing radiation technology is reported herein for synthesizing a novel double-network(DN)ICH based on a poly(ionic liquid)/MXene/poly(vinyl alcohol)(PMP DN ICH)*** well-designed ICH exhibits outstanding ionic conductivity(63.89 mS cm^(-1) at 25℃),excellent temperature resistance(-60–80℃),prolonged stability(30 d at ambient temperature),high oxidation resist-ance,remarkable antibacterial activity,decent mechanical performance,and ***,the ICH performs effectively in a flexible wireless strain sensor,thermal sensor,all-solid-state supercapacitor,and single-electrode triboelectric nanogenerator,thereby highlighting its viability in constructing soft electronic *** highly integrated gel structure endows these flexible electronic devices with stable,reliable signal output *** particular,the all-solid-state supercapacitor containing the PMP DN ICH electrolyte exhibits a high areal specific capacitance of 253.38 mF cm^(-2)(current density,1 mA cm^(-2))and excellent environmental *** study paves the way for the design and fabrication of high-performance mul-tifunctional/flexible ICHs for wearable sensing,energy-storage,and energy-harvesting applications.

关键词： Ionic liquids Double-network hydrogels Temperature tolerance Multifunctionality Flexible electronic devices

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Maximizing Supermarket Profits:Data-Driven Strategies for Pricing,Sales,and Forecasting

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Proceedings of Business and Economic Studies 2024年第1期7卷 117-126页

作者： wenkang li School of Civil Engineering and Transportation Northeast Forestry UniversityHarbin 150040China

The actual circumstances of daily life are crucial for the purchasing and pricing strategies of *** strategies based on these circumstances can assist businesses in ensuring profits and fostering win-win *** paper explores methods to maximize profit through purchasing and sales ***,the relevant data for various categories of vegetables is *** histograms,their sales patterns are directly understood,highlighting the most popular *** analyzing each vegetable category,it becomes evident that their sales data do not conform to normal ***,Spearman correlation coefficients are calculated,revealing strong correlations between certain categories,such as aquatic roots and edible fungi.A line chart depicting the top ten selling vegetables indicates a noticeable *** fitting methods struggle to adequately model the sales of each vegetable category and their relationship with cost-plus *** address this,additional factors such as holidays,weeks,and months are incorporated using techniques like random forest *** approach yields cost-plus pricing dependence curves that better capture the relationship,while effectively managing *** sales volume prediction,the original data displays significant volatility,necessitating the handling of outliers using the threshold *** missing data,linear interpolation is employed to mitigate the impact of continuous missing values on prediction ***,Adam-optimized long short-term memory(LSTM)networks are utilized to forecast incoming quantities for the next seven *** extrapolating from normal sales volume,market capacity is estimated,allowing for additional sales through discount *** framework has the potential to increase original income by 1.1 times.

关键词： Long short-term memory(LSTM) Pricing strategy Decision making

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多特征多层次Sentinel-2影像辽宁省湖库水体提取

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测绘通报 2024年第3期 37-42,106页

作者：李文康赵泉华贾淑涵李玉辽宁工程技术大学测绘与地理科学学院辽宁阜新123000

以辽宁省为研究区,本文基于GEE遥感云平台,使用Sentinel-2遥感影像,提出了一种多特征多层次的湖库水体提取算法。该算法选择自动水体指数(AWEI sh)和改进的归一化水体指数(MNDWI)提取水体,并利用归一化植被指数(NDVI)、归一化建筑指数(N... 详细信息

以辽宁省为研究区,本文基于GEE遥感云平台,使用Sentinel-2遥感影像,提出了一种多特征多层次的湖库水体提取算法。该算法选择自动水体指数(AWEI sh)和改进的归一化水体指数(MNDWI)提取水体,并利用归一化植被指数(NDVI)、归一化建筑指数(NDBI)、归一化差异红边指数(NDREI)、Sentinel-2的B8和B9波段及DEM数据多层次地消除暗地物和高亮地物噪声,对提取结果中被云雾遮挡而部分缺失的水体进行修复,最后将河流及细小像素剔除。利用此算法提取了辽宁省2017—2021年每年4、7、10月的湖库水体,并对比了不同水体提取算法及不同的水体数据产品。试验结果表明,本文算法在大尺度条件下提取水体具有良好的效果,总体精度达96%以上,可以较好地去除植被、阴影等暗像元表面,并且保证了水体信息的完整性,在大尺度水体提取方面具有一定的适用性和稳定性。

关键词： GEE Sentinel-2 湖库水体云遮挡修复去噪

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鄱阳湖湿地溶解性有机质的光化学属性对水体光活性中间体(PPRIs)季节性变化的影响

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湖泊科学 2024年第3期36卷 807-816页

作者：刘新尉艺李文康吴定桂金伟江和龙徐华成宋娜南京林业大学生态与环境学院南京210037 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室南京210008 浙江大学地球科学学院浙江省地学大数据和地球深部资源重点实验室杭州310058 南京高科建设发展有限公司南京210038

湿地的水文和水化学在时空尺度上会呈现显著差异,进而会引发光化学反应的变化,光活性中间体(PPRIs)是水体间接光反应的产物,具有极强的氧化性,对水环境中有机物和污染物的归驱具有重要的影响,因此迫切需要探究湿地中PPRIs的产生过程。... 详细信息

湿地的水文和水化学在时空尺度上会呈现显著差异,进而会引发光化学反应的变化,光活性中间体(PPRIs)是水体间接光反应的产物,具有极强的氧化性,对水环境中有机物和污染物的归驱具有重要的影响,因此迫切需要探究湿地中PPRIs的产生过程。本研究通过捕获剂法监测了鄱阳湖湿地4个季节水体中3种PPRIs(^(1)O_(2)、·OH及^(3)CDOM^(*))的产生速率和稳态浓度的变化,并通过紫外吸收光谱、三维荧光光谱、以及傅立叶变换离子回旋共振质谱等技术对水体中可溶性有机质(DOM)组分的化学特征进行分析,揭示了鄱阳湖湿地不同季节水体中的DOM的光化学反应特性及与PPRIs产生的相关性。结果发现:鄱阳湖夏季和秋季水体的pH值、溶解有机碳(DOC)浓度较高,相反,硝酸盐、亚硝酸盐浓度在夏季和秋季较低。夏季和秋季的DOM中芳香族化合物丰度较高,并且木质素丰度明显高于冬季和春季。不同季节鄱阳湖水体有色可溶性有机物产生能力依次为秋季>夏季>冬季>春季。夏季和秋季水体中^(1)O_(2)和·OH产生速率和稳态浓度显著高于春季和冬季水体。pH、DOC、E2/E3、脂类、蛋白类及木质素类与PPRIs产生速率展现出了良好的正相关关系,尤其是其中的DOC与木质素类组分;另外在三维荧光指标结果中,荧光指数(FI)和新鲜度指数(β/α)与PPRIs呈现负相关关系,证明FI值越低即DOM陆源性越高、非新生DOM比例越高,则PPRIs产生速率越高。综上,PPRIs的光化学产生与植物源DOM密切相关。与春季和冬季相比,夏季和秋季鄱阳湖水体的有机质高,而其中DOM组分中芳香族化合物丰度较高,主要来自陆生植物和土壤有机质,其有机质的腐殖化水平较高,而在春季和冬季水体有机质主要来自湖泊本身和微生物产生的有机质,属于内源。淹水植物残体降解过程释放的有机组分,对夏、秋季DOM的来源和组成有着极易被忽视的影响和作用,而其中光化学活性较强的有机组分如木质素是造成其PPRIs产率更高的主要原因。

关键词：鄱阳湖湿地可溶性有机质光化学光生活性中间体季节变化

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辽宁3个水系鸭绿沙塘鳢个体繁殖力比较研究

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水产科学 2024年第1期43卷 22-31页

作者：李文康骆小年段友健李姣吴晨季辰跃邓鸿圣大连海洋大学水产与生命学院辽宁大连116023

为探明辽宁地区鸭绿沙塘鳢个体繁殖力,于辽河水系新宾满族自治县太子河下夹河段、碧流河水系碧流河水库上游万福段、鸭绿江水系丹东凤城叆河大堡段采捕卵巢发育至Ⅳ期的鸭绿沙塘鳢雌鱼181尾,采用常规生物学方法比较分析鸭绿沙塘鳢个体... 详细信息

为探明辽宁地区鸭绿沙塘鳢个体繁殖力,于辽河水系新宾满族自治县太子河下夹河段、碧流河水系碧流河水库上游万福段、鸭绿江水系丹东凤城叆河大堡段采捕卵巢发育至Ⅳ期的鸭绿沙塘鳢雌鱼181尾,采用常规生物学方法比较分析鸭绿沙塘鳢个体繁殖力。结果表明,鸭绿沙塘鳢个体绝对繁殖力(1067.7±829.7)粒,体长相对繁殖力(97.9±56.1)粒/cm,体质量相对繁殖力(55.2±18.1)粒/g。年龄组成以2、3龄为主,且繁殖贡献率分别为44.9%和39.2%。碧流河万福段鸭绿沙塘鳢个体绝对繁殖力、体长相对繁殖力、体质量相对繁殖力均显著高于太子河下夹河段;绝对繁殖力和体长相对繁殖力与体长、体质量、空壳质量、性腺质量显著相关,体质量相对繁殖力与性腺指数显著相关(P0.05)。3个水系多元线性逐步回归分析显示,个体繁殖力与性腺质量或性腺指数密切相关。卵径频率出现2个峰值,推测鸭绿沙塘鳢为分批产卵类型。本调查结果可为鸭绿沙塘鳢繁殖生物学提供基础数据。

关键词：鸭绿沙塘鳢个体繁殖力辽河水系碧流河水系鸭绿江水系卵径

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基于一气周流理论探讨苓蔻人参汤在溃疡性结肠炎治疗中的应用

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中医临床研究 2024年第3期16卷 47-50页

作者：李文康刘朝霞黑龙江中医药大学黑龙江哈尔滨150040 黑龙江中医药大学附属第一医院黑龙江哈尔滨150040

溃疡性结肠炎(Ulcerative Colitis,UC)是消化系统的常见病和多发病,病情容易反复发作、迁延难愈,严重影响患者的生活和健康,成为临床上难治性疾病之一。清代著名医家黄元御在《四圣心源》中提出“一气周流”理论,以“人体心、肝、肺、... 详细信息

溃疡性结肠炎(Ulcerative Colitis,UC)是消化系统的常见病和多发病,病情容易反复发作、迁延难愈,严重影响患者的生活和健康,成为临床上难治性疾病之一。清代著名医家黄元御在《四圣心源》中提出“一气周流”理论,以“人体心、肝、肺、肾皆由脾胃所化生,人体气机以中土为轴,肝肾之气左升,心肺之气右降,循环周流”为主要内容。根据黄元御“一气周流”的学术思想探讨UC的病机和治法,认为UC的病机关键为水寒土湿,肝郁脾陷。基于以上的病机认识,本病的治疗应从整体把握脾、肝、肾等多脏气机的全局变化,在以温阳健脾,斡旋中气为临床治疗和遣方用药原则的同时,结合具体情况灵活施治,治理源头的同时兼及四维,以求达到土干、木达、水暖,帮助恢复人体一气的流通,使人体阴阳气血随着“周流之气”按部就班地各司其职,以求阴阳相济、气血归和,从而达到人即安和的状态。苓蔻人参汤出自《四圣心源》,为治疗泄利的经典方剂,其依理立方基于“木郁、土湿、水寒”的基本病机,通过条达肝气,益气补中,燥化水湿,以恢复人体的“一气周流”,在一定程度上能缓解甚至治愈疾病,为临床治疗UC提供了新的思路,值得后世医者的进一步研悟借鉴。

关键词：一气周流溃疡性结肠炎苓蔻人参汤

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2D-to-3D buckling transformability enabled reconfigurable metamaterials for tunable chirality and focusing effect

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Photonics Research 2023年第10期11卷 1770-1780页

作者： DONGHAI HAN wenkang li TAO SUN MIN liU XIAOMING CHEN HONGYU SHI ZHENGJIE FAN FANQI MENG liUYANG ZHANG XUEFENG CHEN State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Information and Communications Engineering Xi’an Jiaotong UniversityXi’an 710049China Physikalisches Institut Goethe-Universität60438 Frankfurt am MainGermany

Recently,multifarious deformation approaches in nature have promoted dynamic manipulation for electromagnetic(EM)waves in metamaterials,and those representative strategies are mainly focused on the modulation of spectral *** works have also achieved tunable phase-gradient ***,to broaden the modulation freedom of mechanical deformation,we initially propose two reconfigurable metamaterials consisting of mirrored S-shaped meta-atoms selectively bonded on biaxially pre-stretched *** meta-atoms with spin-insensitive transmittance are buckled into 3D morphologies to break residual symmetries by releasing the stress and to facilitate spin-dependent transmittance under circularly polarized *** to the geometric anisotropy of S-shaped meta-atoms along the x and y axes,3D chiral meta-atoms exhibit discriminate circularly cross-polarized transmittance under opposite *** underlying physical mechanism reveals that EM resonance originates from the excitation of electric dipoles and magnetic dipoles,and their cross coupling finally triggers the chiral effects of 3D *** introducing the gradient-phase design that keeps unchanged under various strains,two types of meta-atoms with specified orientations are interleaved to design a double-foci metalens,and its 2D-to-3D morphology transformation shortens the focusing length and facilitates the intensity change of two *** approach in designing reconfigurable EM metamaterials with 2D-to-3D buckling transformability can be further extended toward terahertz even optical wavebands,and it may assist with deriving more applicable multi-functionalities in the aspects of imaging,sensing,and holograms.

关键词： buckling polarized circular

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基于图像识别和云端互联的高速公路综合汽车安全保障系统的设计

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黑龙江科学 2024年第16期15卷 44-47,51页

作者：李文康刘承艳王柯璇田哲陈邦华东北林业大学土木与交通学院哈尔滨150040

在低能见度天气下的行车安全一直是人们广泛关注的话题,尤其是在高速公路上,由于行驶速度较快,不仅容易发生交通事故,事故发生后人力财力物力的损失也比一般道路更为严重。为了尽量避免低能见度天气下高速公路事故的发生,提出一种基于... 详细信息

在低能见度天气下的行车安全一直是人们广泛关注的话题,尤其是在高速公路上,由于行驶速度较快,不仅容易发生交通事故,事故发生后人力财力物力的损失也比一般道路更为严重。为了尽量避免低能见度天气下高速公路事故的发生,提出一种基于图像识别和云端互联的高速公路综合汽车安全保障系统,防止车辆超速、疲劳驾驶,降低追尾事故的发生率,极大程度地为车辆出行提供安全保障,降低事故风险。

关键词：交通安全高速公路雾天行车多通路网络云端+本地

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Constructing extrinsic oxygen vacancy on the surface of photocatalyst as CO_(2)and electrons reservoirs to improve photocatalytic CO_(2)reduction activity

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Journal of Environmental Sciences 2024年第6期140卷 37-45页

作者： Zaiyong Jiang Hao li Zhimin Yuan Zheng Wang Maohong Fan wenkang Miao Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Chemistry&Chemical Engineering and Environmental Engineering Weifang UniversityWeifangShandong 261061China Departments of Chemical and Petroleum Engineering University of WyomingLaramieWY 82071USA Materials Genome Institute Shanghai UniversityShanghai 200444China

Constructing own oxygen vacancies in the photocatalysts is a very promising method to improve their photocatalytic CO_(2)reduction ***,some catalysts have excellent stabilities,making it difficult for them to construct their own oxygen *** simplify the above difficulty of stable photocatalysts,constructing extrinsic oxygen vacancies on their surface as a novel idea is ***,a stable TiO_(2)nanosheet is chosen as a research object,we uniformly deposited BiOCl quantum dots on their surface via a simple adsorption-deposition *** is found that BiOCl quantum dots are able to simultaneously self-transform into defective BiOCl with many oxygen vacancies when the photocatalyst is performed photocatalytic CO_(2)*** extrinsic oxygen vacancies can act as“CO_(2)and photo-generated electrons reservoirs”to improve CO_(2)capture and accelerate the separation of photogenerated electrons and *** the above reasons,the modified TiO_(2)showed obvious enhancement of photocatalytic CO_(2)reduction compared to pristine TiO_(2)and *** work may open a new avenue to broaden the use of oxygen vacancies in the process of photocatalytic CO_(2)reduction.

关键词： Oxygen vacancy BiOCl Photocatalyst CO_(2)reduction TiO_(2)

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A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

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Journal of Advanced Ceramics 2024年第7期13卷 1011-1022页

作者： Zheng liang Han Zhang Yichuan li wenkang Zhang Jian Zhou Qilin Gu Zhaoxiang Zhong Weihong Xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 211816China Nanjing Membrane Application Institute Co. Ltd.Nanjing 210009China

Porous ceramics usually require high mechanical strength and maximized porosity simultaneously,while for conventional particle grading strategies,it is highly challenging to meet both *** this end,a reverse particle grading strategy was developed based on the linear packing model by unusually introducing coarse particles(d50=16μm)into a fine particle(d50=5μm)*** the extrusion and sintering process,tubular porous SiC ceramic supports with improved mechanical strength were successfully *** effects of coarse particles on the rheological properties of the ceramic paste and the macroscopic properties and microstructure of the SiC supports were systematically *** an increase in the content of coarse SiC particles to 30 wt%,the pressure generated during extrusion decreased from 5.5±0.2 to 1.3±0.1 ***,the bending strength of the tubular supports increased from 36.6±5.6 to 49.1±4.5 MPa when 20 wt%coarse powder was *** notably improved mechanical strength was attributed to the distribution of coarse particles that prolonged the route of crack ***,the optimized tubular supports had an average pore size of 1.2±0.1μm,an open porosity of 45.1%±1.6%,and a water permeability of 7163±150 L/(m2·h·bar)as well as good alkali and acid corrosion ***,the strategy was proven to be feasible for the scale-up fabrication of 19-channel SiC tubular porous ceramic supports.

关键词： porous SiC ceramic tubular ceramic support reverse particle grading reaction bonding chemical stability

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