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Food Science and Human Wellness 2024年

作者： Jianxin Tian Jingru Liao Biluan zhong Pan Li Xiaoqian Liu bing Du Guanzhan Fish Maw Nutrition and Security Research Center， College of Food Science， South China Agricultural University Guangdong Shenzhiyuan Health Technology Co.， Ltd.

Delaying skin-aging through diet is a hot research topic in recent years， but the anti-aging effects of fish gelatin and related mechanisms are not well understood. In this study， we prepared edible fish gelatin from the swim bladder of Cynoscion acoupa using three different processing methods， namely dried (DCM)， soaked (SCM) and instanted (ICM)， to investigate its anti-aging effects and mechanisms on D-galactose induced skin aging in mice， as well as its effects on the gut microbiota. The results demonstrated that fish gelatin significantly increased water content， collagen， hyaluronic acid (HA) and hyaluronic acid (HYP) content， and skin integrity of mice skin， as well as enhanced the antioxidative ability and anti-inflammatory capacity of the skin. In terms of protein and mRNA expression levels in skin tissue， CMs treated with different treatments can up-regulate the expression of EGFR and TIMP1， down-regulating the expression of MMP1 and MMP3， and increase the expression of COL3A1 and COL1A2. CMs attenuated the D-galactose-mediated inhibition collagen expression by stimulating the TGF-β/Smad signaling pathway， thereby maintaining collagen matrix homeostasis. In addition， we revealed that CMs reversed gut micribiota by increase the abundance of intestinal flora. In conclusion， we demonstrated that CMs， especially for ICM， as an effective dietary supplement， have potential anti-aging and skin health benefits.

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农村集体经济组织与农民专业合作社协同扶贫模式创新:重庆例证

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改革 2020年第5期 150-159页

作者：丁忠兵重庆社会科学院

农村集体经济组织和农民专业合作社是与农民联系较为紧密的两类经济组织,是贫困地区打赢脱贫攻坚战的重要内生性力量。但在实践中,受农村集体经济组织市场主体地位不明确、承担市场经营风险能力弱及农民专业合作社总体规模偏小、脱贫带... 详细信息

农村集体经济组织和农民专业合作社是与农民联系较为紧密的两类经济组织,是贫困地区打赢脱贫攻坚战的重要内生性力量。但在实践中,受农村集体经济组织市场主体地位不明确、承担市场经营风险能力弱及农民专业合作社总体规模偏小、脱贫带动力不强等因素影响,两类主体的扶贫作用都未能得到充分发挥。重庆市城口县是国家扶贫开发工作重点县,在近年来的脱贫攻坚中,一方面普遍性地成立了新型农村集体经济组织,作为承接相关政府部门扶贫资源、开展村集体资产运营管理的平台;另一方面通过平等协商将村集体经济组织承接的扶贫资源以入股方式投入当地运行规范、实力较强的农民专业合作社,以获取相对稳定的分红收益,并优先用于增加贫困户收入。该模式既为村“两委”参与市场活动和承接政府扶贫资源提供了有效载体,又较好地保证了农民专业合作社等市场主体的经营自主权,有利于构建激励兼容、多方共赢的长效扶贫机制,是有镜鉴价值的扶贫模式创新。

关键词：农村集体经济组织农民专业合作社协同扶贫

ρ-meson longitudinal leading-twist distribution amplitude revisited and the D→ρsemileptonic decay

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Chinese Physics C 2024年第6期48卷 82-91页

作者：钟涛代亚红付海冰 Department of Physics Guizhou Minzu UniversityGuiyang 550025China

Motivated by our previous study[***.D 104(1),016021(2021)]on the pionic leading-twist distribution amplitude(DA),we revisit theρ-me son leading-twist longitudinal DAφ_(2;ρ)^(‖)(x,μ)in this study.A model proposed by Chang based on the DYyson-Schwinger equations is adopted to describe the behavior ofφ_(2;ρ)^(‖)(x,μ).However,theξ-moments ofφ_(2;ρ)^(‖)(x,μ)are calculated with the QCD sum rules in the framework of the background field *** sum rule formulas for these moments are *** accurate values for the first five nonzeroξ-moments at the typical scaleμ=(1.0,1.4,2.0,3.0)GeV are given,e.g.,atμ=1 GeV,(ξ^(2))>_(2;ρ)^(‖)=0.220(6),(ξ^(4))>_(2;ρ)^(‖)=0.103(4),(ξ^(6))>_(2;ρ)^(‖)=0.066(5),(ξ^(8))>_(2;ρ)^(‖)=0.046(4),and(ξ^(10))>_(2;ρ)^(‖)=0.035(3).By fitting these values with the least squares method,the DSE model forφ_(2;ρ)(x,μ)is *** taking the left-handed current light-cone sum rule approach,we obtain the transition form factor in the large recoil region,i.e.,A_(1)(0)=0.498_(-0.012)^(+0.014),A_(2)(0)=0.460_(-0.047)^(+0.055),and V(0)=0.800_(-0.014)^(+0.015),and the ratio r_(2)=0.923_(-0.119)^(+0.133),rV=1.607_(-0.071)^(+0.071).After extrapolating with a rapidly converging series based on z(t)-expansion,we present the|V_(cd)|-independent decay width for the semileptonic decays D→ρ^(l+)v_(l).Finally,the branching fractions are B(D^(0)→ρ^(-)e+v_(e))=1.825_(-0.162)^(+0.170)±0.004,B(D^(+)→ρ^(0)e+v_(e))=2.299_(-0.204)^(+0.214)±0.011,B(D^(0)→ρ^(-)μ^(+)v_(μ))=1.816_(-0.160)^(+0.168)±0.004,and B(D^(+)→ρ^(0)μ+v_(μ))=2.288_(-0.201)^(+0.212)±0.011.

关键词： QCD sum rule charmed meson semileptonic decay Rho meson light-cone distribution amplitude

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微带阵列天线雷达散射截面缩减技术研究进展

系统工程与电子技术 2009年第4期31卷 812-815页

作者：赵书晨王秉中电子科技大学应用物理研究所四川成都610054

天线的雷达散射截面(radar cross section,RCS)是判断飞行器隐身能力的重要参数。降低天线RCS大致可以分为全时缩减和非全时缩减两类方法。追踪最新的研究进展,介绍了一些可以降低微带天线RCS的结构,详细讨论了天线RCS缩减的各种方法并... 详细信息

天线的雷达散射截面(radar cross section,RCS)是判断飞行器隐身能力的重要参数。降低天线RCS大致可以分为全时缩减和非全时缩减两类方法。追踪最新的研究进展,介绍了一些可以降低微带天线RCS的结构,详细讨论了天线RCS缩减的各种方法并分析其利弊。最后指出微带阵列天线需要结合多种技术形成多层可重构阵列来减少RCS。

关键词：微带天线 RCS 综述缩减阵列

荷兰研究型大学荣誉教育的探索与经验——以乌得勒支大学为例

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清华大学教育研究 2022年第2期43卷 64-72,93页

作者：方芳钟秉林北京师范大学教育学部北京100875

荷兰高校开展的天才教育被誉为“欧洲天才教育的领军者”。本文针对荷兰高等教育体系及其荣誉教育发展做了概述,并以荷兰顶尖的研究型大学——乌得勒支大学为例,从培养目标、选拔机制、课程设置、考核评价四方面梳理了该校荣誉教育开展... 详细信息

荷兰高校开展的天才教育被誉为“欧洲天才教育的领军者”。本文针对荷兰高等教育体系及其荣誉教育发展做了概述,并以荷兰顶尖的研究型大学——乌得勒支大学为例,从培养目标、选拔机制、课程设置、考核评价四方面梳理了该校荣誉教育开展的实践探索,总结了荷兰研究型大学拔尖创新人才培养机制的经验与启示:规范遴选和录取工作,重视荣誉学生选拔标准和程序的科学性与严谨性;开展多元学科融合教育,为荣誉学生提供额外的高挑战性的教育机会;实施团队式学习,引领荣誉学生基于团队合作走出舒适区并培养协作意识;构建荣誉社区,为荣誉学生在卓越氛围中提供学术和情感支持;集中优势资源,为荣誉学生的优势累积提供坚实的保障和基础。

关键词：荷兰研究型大学荣誉教育乌得勒支大学

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提高无线传感器网络信息安全的时间反演技术

红外与毫米波学报 2010年第2期29卷 117-122页

作者：李德洪劲松王秉中电子科技大学物理电子学院四川成都610054

近年来无线传感器网络被广泛应用于三维立体监测、分布式监测、目标跟踪、空间探索、随机分布测量等领域.由于无线传感器网络在军事上的特殊用途,如敌情侦察、兵力监控及其它的特殊用途,使其信息传输的安全性研究得到广泛关注.通过引入... 详细信息

近年来无线传感器网络被广泛应用于三维立体监测、分布式监测、目标跟踪、空间探索、随机分布测量等领域.由于无线传感器网络在军事上的特殊用途,如敌情侦察、兵力监控及其它的特殊用途,使其信息传输的安全性研究得到广泛关注.通过引入一种新技术——时间反演(TR,Time Reversal)技术,来降低信号在空间与时间上被非法检测到的概率.时间反演技术使得信号只有在特定的时间和特定的空间内才可以被检测出来,而超出这个范围信号很难被检测出来,从而提高了无线传感器网络的信息安全.

关键词：时间反演无线传感器网络抗检测/截获性能信息安全

MicroRNAs:A novel signature in the metastasis of esophageal squamous cell carcinoma

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World Journal of Gastroenterology 2024年第11期30卷 1497-1523页

作者： Qi-Ying Wei Feng Jin zhong-Yu Wang bing-Jie Li Wen-Bo Cao Zhi-Yan Sun Sai-Jun Mo Department of Pathophysiology School of Basic Medical SciencesZhengzhou UniversityZhengzhou 450001Henan ProvinceChina Department of Perioperative Medicine The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Division of Special Service Department of Basic OncologySchool of Basic MedicineZhengzhou UniversityZhengzhou 450001Henan ProvinceChina Department of Basic Science of Oncology School of Basic Medical SciencesZhengzhou UniversityZhengzhou 450001Henan ProvinceChina

Esophageal squamous cell carcinoma(ESCC)is a malignant epithelial tumor,characterized by squamous cell differentiation,it is the sixth leading cause of cancer-related deaths *** increased mortality rate of ESCC patients is predominantly due to the advanced stage of the disease when discovered,coupled with higher risk of metastasis,which is an exceedingly malignant charac-teristic of cancer,frequently leading to a high mortality ***,there is currently no specific and effective marker to predict and treat metastasis in ***(miRNAs)are a class of small non-coding RNA molecules,approximately 22 nucleotides in *** are vital in modulating gene expression and serve pivotal regulatory roles in the occurrence,progression,and prognosis of ***,we have examined the literature to highlight the intimate correlations between miRNAs and ESCC metastasis,and show that ESCC metastasis is predominantly regulated or regulated by genetic and epigenetic *** review proposes a potential role for miRNAs as diagnostic and therapeutic biomarkers for metastasis in ESCC metastasis,with the ultimate aim of reducing the mortality rate among patients with ESCC.

关键词： MicroRNAs Esophageal squamous cell carcinoma Metastasis Signaling pathway Epigenetics mechanism

Modeling and Simulation of Lithium Vacuum Evaporation Process Using COMSOL Multiphysics

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Journal of Thermal Science 2024年第1期33卷 86-100页

作者： LIAN Xuexin zhong Dawen Beijing Key Laboratory of Passive Nuclear Power Safety and Technology North China Electric Power UniversityBeijing 102206China

Based on the COMSOL Multiphysics simulation software,this study carried out modeling and numerical simulation for the evaporation process of liquid metal lithium in the vacuum free molecular flow *** motion of lithium atoms in the evaporation process was analyzed through a succession of *** on the available experimental values of the saturated vapor pressure of liquid metal lithium,the relationship between saturated vapor pressure and temperature of liquid lithium in the range of 600 K-900 K was obtained.A two-dimensional symmetric model(3.5 mm×20 mm) was established to simulate the transient evaporation process of liquid lithium at wall temperatures of 750 K,780 K,800 K,810 K,825 K,and 850 K,*** effects of temperature,the evaporation coefficient,back pressure,and length-to-diameter ratio on the evaporation process were studied;the variation trends and reasons of the molecular flux and the pressure during the evaporation process were *** the same time,the evaporation process under variable wall temperature conditions was *** research made the evaporation process of liquid lithium in vacuum molecular flow clearer,and provided theoretical support for the space reactor and nuclear fusion related fields.

关键词： free molecular flow saturated vapor pressure vacuum evaporation liquid lithium metal

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“山慈菇”的本草考证

植物分类学报 2008年第5期46卷 785-792页

作者：邴其忠张本刚中国医学科学院北京协和医学院药用植物研究所北京100094

以'山慈菇'之名使用的中药材,来源于多种不同植物,造成目前在命名和药材使用上的混乱。本文根据古代和现代文献中的图文,以时间为脉络,对山慈菇药用植物的形态性状、古文献的附图、地理分布等进行考证,并澄清了几种古文献里'山慈菇'的... 详细信息

以'山慈菇'之名使用的中药材,来源于多种不同植物,造成目前在命名和药材使用上的混乱。本文根据古代和现代文献中的图文,以时间为脉络,对山慈菇药用植物的形态性状、古文献的附图、地理分布等进行考证,并澄清了几种古文献里'山慈菇'的原植物,指出《本草拾遗》(唐)记载的'山慈菇'应该是来源于杜鹃兰Cremastra appendiculata(***)Makino,此后的古文献里记载的'山慈菇'则包括老鸦瓣Tulipa edulis(Miq.)Baker和杜鹃兰***两种植物。而现代文献又收录了两种独蒜兰属Pleione植物及其他多种植物,都不是山慈菇的原植物。

关键词：本草考释中国古籍文献杜鹃兰山慈菇老鸦瓣

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关于滤光片透射系数的直接测定

太阳能学报 1988年第3期9卷 338-344页

作者：王炳忠国家气象局气象科学研究院

本文讨论了一种用直接日射表直接测定滤光片透射系数~*的方法,该方法不仅简便易行,而且优于一般用分光光度计进行分光测定的结果。测定实例表明,如果重复测定数次,以其平均值为准,则可使测定误差控制在±0.1％以内,甚至更低。

关键词：滤光片直接测定透射系数穿透率