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Janus MXene film with gradient structure for highly efficient terahertz and infrared electromagnetic absorption

Nano Research 2025年第1期18卷 434-442页

作者： Shaodian Yang weiqiang huang Zhiqiang Lin Zibo Chen Rongliang Yang Yi Jia Xuebin Liu Rui Wang Zhiping Zeng Yougen Hu Huanjun Chen Xuchun Gui11 State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China China Academy of Aerospace Science and Innovation Beijing 100176China Guangdong Province Key Laboratory of Display Material and Technology Guangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Electromagnetic interference (EMI) shielding inhigh-frequency range, especially the rapidly growing terahertz(THz) frequency range, attracts increasing attention due tothe potential application of terahertz in 6G wirelesscommunication, and security inspection. However, traditionalconductive EMI films typically achieve high shieldingeffectiveness through strong reflection, which may causesecondary pollution to other devices. Here, a gradientstructure strategy was proposed to constructTi_(3)C_(2)Tx/hydroxypropyl methyl cellulose (HPMC) film, in whichthe content of Ti_(3)C_(2)Tx gradually increases along the thicknessdirection, resulting in different conductivity of the two surfaces(surface-M and surface-H) for the film. The obtained gradientfilmexhibits an EMI shielding efficiency of over 48.5 dB in theTHz range (0.2-1.6 THz) at a thickness of 40 μm. Especially,as the THz waves incident from the surface-H to the film, the absorption effectiveness reaches 48.2 dB (average absorbedpower loss up to 91.4%), and the reflection effectiveness is only 0.3 dB. In additions, the gradient-film also demonstrates ahigh absorption rate of 95.5% in the infrared band (2.5-16.7 μm). Moreover, the gradient-film exhibits an excellent tensilestress and Young’s modulus value of 173.1 MPa and 2.8 GPa, respectively. Therefore, the gradient-film proposed in thiswork, with excellent electromagnetic absorption in both THz and infrared band, provides a promising candidate for the nextgenerationEMI shielding applications.

关键词： electromagnetic interference shielding Janus film terahertz MXene

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1000 MW超超临界锅炉高温再热器炉内壁温分布特性研究

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锅炉技术 2025年第1期56卷 35-41页

作者：赵宁宁李培黄炜强施子福李望钟崴浙江浙能技术研究院有限公司节能减排污染物控制重点实验室浙江杭州311121 浙江大学热工与动力系统研究所浙江杭州310027 浙江浙能中煤舟山煤电有限责任公司浙江舟山316131 浙江大学热能工程研究所(能源清洁利用国家重点实验室) 浙江杭州310027

针对高温再热器炉内壁温难以长时间连续监测的问题,选择K分度热电偶的测量元件,采用集热块与测量元件预先焊接在一起后安装在某1000 MW锅炉高温再热器炉内管壁上的方式,获得不同工况下高温再热器炉内壁温特性。分析了高温再热器同一根... 详细信息

针对高温再热器炉内壁温难以长时间连续监测的问题,选择K分度热电偶的测量元件,采用集热块与测量元件预先焊接在一起后安装在某1000 MW锅炉高温再热器炉内管壁上的方式,获得不同工况下高温再热器炉内壁温特性。分析了高温再热器同一根管沿管程温度分布、烟气入口截面温度分布特性、炉内外对应测点的关系、炉内测点与负荷的关系以及管壁相同位置向火面及背火面温度之间的差别。结果表明:沿管程方向,U型弯底部温度最高;不同负荷下高温再热器烟气入口截面温度分布无明显统一规律;炉内壁温测点可以更加真实地反映炉内实际壁温;炉内测点与炉外测点温度存在近似线性的关系;炉内测点温度与负荷无明显量化关系;向火面温度较背火面高出35~55℃。

关键词： 1000 MW锅炉炉内壁温高温再热器温度分布

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Assessment of microbial community structure in human colostrum and mature milk based on geographical location and delivery mode

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Science Bulletin 2017年第11期62卷 745-747页

作者： Xiaoxia Xi weiqiang huang Qiangchuan Hou Lai-Yu Kwok Zhihong Sun Tiansong Sun Key Laboratory of Dairy Products Processing Ministry of AgricultureInner Mongolia Agricultural University

Breast milk is the most suitable food for the growth and development of infants because it fulfills all the nutritional requirements at this growth stage^([1]).In addition,the wide range of bioactive compounds in milk exerts numerous beneficial effects to infants,including immune system development,protection from infections and metabolism regulation^([2]).

关键词：微生物群落结构地理位置成熟乳评价初乳分娩生物活性物质营养需求

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The Hilbert expansion of the Boltzmann equation in the incompressible Euler level in a channel

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Science China Mathematics 2025年第1期68卷 39-88页

作者： Feimin huang weiqiang Wang Yong Wang Feng Xiao Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Computing and Stochastic Mathematics(Ministry of Education) School of Mathematics and StatisticsHunan Normal UniversityChangsha 410081China

The study of the hydrodynamic limit of the Boltzmann equation with physical boundary is a challenging problem due to the appearance of the viscous and Knudsen boundary *** this paper,the hydrodynamic limit from the Boltzmann equation with the specular reflection boundary condition to the incompressible Euler equations in a channel is *** on the multi-scaled Hilbert expansion,the equations with boundary conditions and compatibility conditions for interior solutions,and viscous and Knudsen boundary layers are derived under different scaling,***,some uniform estimates for the interior solutions,and viscous and Knudsen boundary layers are *** the help of the L^(2)-L^(∞) framework and the uniform estimates obtained above,the solutions to the Boltzmann equation are constructed by the truncated Hilbert expansion with multiscales,and hence the hydrodynamic limit in the incompressible Euler level is justified.

关键词： Boltzmann equation incompressible Euler equations hydrodynamic limit Hilbert expansion specular reflection boundary condition viscous boundary layer Knudsen boundary layer

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The effects of probiotics administration on the milk production,milk components and fecal bacteria microbiota of dairy cows

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Science Bulletin 2017年第11期62卷 767-774页

作者： Haiyan Xu weiqiang huang Qiangchuan Hou Lai-yu Kwok Zhihong Sun Huimin Ma Feiyan Zhao Yuan-Kun Lee Heping Zhang Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationInner Mongolia Agricultural University Department of Microbiology National University of Singapore

Probiotics administration can improve host health. This study aims to determine the effects of probiotics （Lactobacillus casei Zhang and Lactobacillus plantarum P-8） administration on milk production, milk func- tional components, milk composition, and fecal microbiota of dairy cows. Variations in the fecal bacteria microbiota between treatments were assessed based on 16S rRNA profiles determined by PacBio single molecule real-time sequencing technology. The probiotics supplementation significantly increased the milk production and the contents of milk immunoglobulin C （IgG）, lactoferrin （LTF）, lysozyme （LYS） and lactoperoxidase （LP）, while the somatic cell counts （SCC） significantly decreased （P〈0.01）. However, no significant difference was found in the milk fat, protein and lactose contents （P 〉 0.05）. Although the probiotics supplementation did not change the fecal bacteria richness and diversity, significantly more rumen fermentative bacteria （ Bacteroides, Roseburia, Ruminococcus, CIostridium, Coprococcus and Dorea） and beneficial bacteria （Faecalibacterium prausnitzii） were found in the probiotics treatment group. Meanwhile, some opportunistic pathogens e.g. Bacillus cereus, Cronobacter sakazakii and Alkaliphilus oremlandii, were suppressed. Additionally, we found some correlations between the milk production, milk components and fecal bacteria. To sum up, our study demonstrated the beneficial effects of probiotics application in improving the quality and quantity of cow milk production.

关键词： Milk production Milk components Fecal bacteria Prnbintics Dairy cow PacBio single molecule real-time sequencing technology

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Changes in chemical composition,structural and functional microbiome during alfalfa(Medicago sativa)ensilage with Lactobacillus plantarum PS-8

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Animal Nutrition 2022年第2期9卷 100-109页

作者： Lijun You Weichen Bao Caiqing Yao Feiyan Zhao Hao Jin weiqiang huang Bohai Li Lai-Yu Kwok Wenjun Liu Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationKey Laboratory of Dairy Products ProcessingMinistry of Agriculture and Rural AffairsInner Mongolia Agricultural UniversityHohhot010018China

Improving silage production by adding exogenous microorganisms not only maximizes nutrient preservation,but also extends product shelf ***,changes in the quality and quantity of Lactobacillus plantarum PS-8(PS-8)-inoculated alfalfa(Medicago sativa)during silage fermentation were monitored at d 0,7,14,and 28(inoculum dose of PS-8 was 1105 colony forming units[cfu]/g fresh weight;50 kg per bag;10 bags for each time point)by reconstructing metagenomic-assembled genomes(MAG)and Growth Rate InDex(GRiD).Our results showed that the exogenous starter bacterium,PS-8 inoculation,became the most dominating strain by d 7,and possibly played a highly active role throughout the fermentation *** pH value of the silage decreased greatly,accompanied by the growth of acidproducing microorganisms namely PS-8,which inhibited the growth of harmful microorganisms like molds(4.18 vs.1.42 log cfu/g)and coliforms(4.95 vs.0.66 log most probable number[MPN]/g).The content of neutral detergent fiber(NDF)decreased significantly(41.6%vs.37.6%;dry matter basis).In addition,the abundance and diversity of genes coding microbial carbohydrate-active enzymes(CAZymes)increased significantly and desirably throughout the fermentation,particularly the genes responsible for degrading starch,arabino-xylan,and ***,our results showed that PS-8 was replicating rapidly and consistently during early-and mid-fermentation phases,promoting the growth of beneficial lactic acid bacteria and inhibiting undesirable microbes,ultimately improving the quality of silage.

关键词： Lactobacillus plantarum PS-8 Alfalfa silage Lactic acid bacteria Microbiota community Metagenomic-assembled genome

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Spraying compound probiotics improves growth performance and immunity and modulates gut microbiota and blood metabolites of suckling piglets

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Science China(Life Sciences) 2023年第5期66卷 1092-1107页

作者： weiqiang huang Teng Ma Yiqun Liu Lai-Yu Kwok Yalin Li Hao Jin Feiyan Zhao Xin Shen Xuan Shi Zhihong Sun Heping Zhang Inner Mongolia Key Laboratory of Dairy Biotechnology and Engineering Inner Mongolia Agricultural UniversityHohhot 010018China Key Laboratory of Dairy Products Processing Ministry of Agriculture and Rural AffairsInner Mongolia Agricultural UniversityHohhot 010018China Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationInner Mongolia Agricultural UniversityHohhot 010018China

One factor that shapes the establishment of early neonatal intestinal microbiota is environmental microbial exposure,and probiotic application has been shown to promote health and growth of ***,this study hypothesized that environmental probiotic application in early days of life would be beneficial to newborn *** study aimed to investigate the effect of spraying a compound probiotic fermented liquid(CPFL)into the living environment of piglets on their early growth performance and *** work included 68 piglets,which were randomized into probiotic and control *** and fecal samples were collected at 0,3,7,14,and 21 days of *** CPFL significantly reshaped the microbiota composition of the delivery room environment,increased piglets’daily weight gain and weaning weight(P<0.001),and modulated piglets’serum cytokine levels(increases in Ig A,Ig G,and IL-10;decrease in IFN-γ;P<0.05 in each case)in ***,spraying CPFL during early days of life modified piglets’gut microbiota structure and diversity,increased the abundance of some potentially beneficial bacteria(such as Bacteroides uniformis,Butyricimonas virosa,Parabacteroides distasonis,and Phascolarctobacterium succinatutens)and decreased the abundance of Escherichia coli(P<0.05).Interestingly,CPFL application also significantly enhanced the gut microbial bioactive potential and levels of several serum metabolites involved in the metabolism of vitamins(B2,B3,B6,and E),medium/long-chain fatty acids(caproic,tetradecanoic,and peptadecanoic acids),and dicarboxylic acids(azelaic and sebacic acids).Our study demonstrated that spraying CPFL significantly could improve piglets’growth performance and immunity,and the beneficial effects are associated with changes in the gut microbiota and host *** study has provided novel data for future development of probiotic-based health-promoting strategies and expanded our knowledge of probiotic application in animal husba

关键词： compound probiotic fermented liquid gut microbiota immunity piglets serum metabolites

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常减压蒸馏装置加工高硫原油的风险与对策

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石油炼制与化工 2009年第11期40卷 32-35页

作者：黄卫强中国石油化工股份有限公司上海高桥分公司炼油事业部上海200137

对高硫原油在常减压蒸馏装置加工过程中存在的风险及其部位进行分析,提出相应的安全对策,使生产装置在可接受的风险水平下安全运行。通过炼制相对低廉的高硫原油,提高炼化企业的效益。

关键词：高硫原油常减压蒸馏腐蚀硫化氢

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低渗稠油油藏CO_(2)表面活性剂复合吞吐开发——以克拉玛依油田五区南上乌尔禾组油藏为例

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新疆石油地质 2022年第2期43卷 183-187页

作者：黄伟强中国石油新疆油田分公司重油开发公司新疆克拉玛依834000

克拉玛依油田五区南上乌尔禾组油藏为低孔低渗稠油油藏,储集层物性差,注水开发产量递减快,地层能量保持程度低,后油井全面关停。近年来重新压裂复产,初期效果显著,但产量递减率高。为解决油井低产低效的问题,开展CO_(2)表面活性剂复合... 详细信息

克拉玛依油田五区南上乌尔禾组油藏为低孔低渗稠油油藏,储集层物性差,注水开发产量递减快,地层能量保持程度低,后油井全面关停。近年来重新压裂复产,初期效果显著,但产量递减率高。为解决油井低产低效的问题,开展CO_(2)表面活性剂复合吞吐技术研究,并进行提产试验。在增油机理实验的基础上,应用多组分油藏数值模拟技术,对CO_(2)表面活性剂复合注入方式及参数进行优化;建立了增产油量随不同吞吐周期注入量、注气速度、焖井时间、开采强度等参数变化的响应关系,确定了复合吞吐的最佳注入参数。矿场实施后,单井自喷达240 d,增产原油630 t,补充地层能量、改善流动性的效果显著,可供同类油藏开发参考。

关键词：克拉玛依油田上乌尔禾组低渗稠油油藏 CO_(2) 表面活性剂复合吞吐数值模拟采收率

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Geomorphological effects of plate movement during Quaternary in China' s tropics

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Journal of Geographical Sciences 2004年第2期 124-129页

作者： ZHANG weiqiang 1 ,huang Zhenguo 2 (1. Guangdong Business College, Guangzhou 510320, China 2. Guangzhou Institute of Geography, Guangzhou 510070, China)

The eastern and western fronts of plate movement in Taiwan Island and Tibetan Plateau respectively are the two major sources of tectonic force for the morphogensis during Quaternary in China's tropics. Seven examples of geomorphological effects of plate movement are enumerated to discuss the differentiation of tectonic landforms in space and time during Quaternary. The tectonic movement tends to be more active since middle Pleistocene. Some phenomena such as the arc-shape mountain systems, volcanism and crustal deformation imply that the juncture zone of eastern and western tectonic forces is located at about 110 o E.

关键词： plate tectonic geomorphological effect China’s tropics

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