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Performance and Optimization of Air Source Heat Pump Water Heater with Cyclic Heating

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Journal of Shanghai Jiaotong university(Science) 2024年第2期29卷 179-187页

作者：李凡陆高锋丁云霄郑春元李斌翟晓强 College of Mechanical and Power Engineering Shanghai Jiao Tong UniversityShanghai 200240China Guangdong Midea HVAC Equipment Co. Ltd.Foshan 528311GuangdongChina

A new type of microchannel condenser applied in the air source heat pump water heater(ASHPWH)with cyclic heating was proposed in this study.The operating performance of the ASHPWH was frst tested.Then,the structure of the microchannel condenser was optimized with the implement of vortex generators.Finally,a numerical model of the ASHPWH was established and the optimized microchannel condenser was studied.The experimental results showed that the average coefficient of performance(COP)of the 1HP(735 W)ASHPWH reached 3.48.In addition,the optimized microchannel condenser could be matched with a 3 HP(2430W)ASHPWH with an average heating capacity of 10.30 kW,and achieving an average COP of 4.24,14.6%higher than the limit value in the national standard.

关键词： air source heat pump water heater(ASHPWH) cyclic heating microchannel condenser

A novel candidate gene CLN8 regulates fat deposition in avian

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畜牧与生物技术杂志:英文版 2023年第5期14卷 1895-1908页

作者： Xiaoqin Li fan Zhang yunxiao Sun Dandan Sun fangxi Yang Yongtong Liu Zhuocheng Hou National Engineering Laboratory for Animal Breeding and Key Laboratory of Animal Genetics and Breeding College of Animal Science and TechnologyMARAChina Agricultural UniversityNo.2 Yuanmingyuan West RdBeijing 100193China Beijing Nankou Duck Breeding Inc Beijing 100076China

Background The fat deposition has a crucial role in animal meat flavor,and fat deposition-related traits are vital for breeding in the commercial duck industry.Avian fat-related traits are typical complex phenotypes,which need a large amount of data to analyze the genetic loci.Results In this study,we performed a new phenotypic analysis of fat traits and genotyped whole-genome varia-tions for 1,246 ducks,and combed with previous GWAS data to reach 1,880 ducks for following analysis.The carcass composition traits,subcutaneous fat weight(SFW),subcutaneous fat percentage(SFP),abdominal fat weight(AFW),abdominal fat percentage(AFP)and the body weight of day 42(BW42)for each duck were collected.We identified a set of new loci that affect the traits related to fat deposition in avian.Among these loci,ceroid-lipofuscinosis,neuronal 8(CLN8)is a novel candidate gene controlling fat deposition.We investigated its novel function and regulation in avian adipogenesis.Five significant SNPs(the most significant SNP,P-value=21.37E-12)and a single haplotype were detected in the upstream of CLN8 for subcutaneous fat percentage.Subsequently,luciferase assay demonstrated that 5 linked SNPs in the upstream of the CLN8 gene significantly decreased the transcriptional activity of CLN8.Further,ATAC-seq analysis showed that transcription factor binding sites were identified in a region close to the haplotype.A set of luciferase reporter gene vectors that contained different deletion fragments of the CLN8 promoter were con-structed,and the core promoter area of CLN8 was finally identified in the-1,884/-1,207 bp region of the 5′flanking sequences,which contains adipogenesis-related transcription factors binding sites.Moreover,the over-expression of CLN8 can remarkably facilitate adipocyte differentiation in ICPs.Consistent with these,the global transcriptome profiling and functional analysis of the over-expressed CLN8 in the cell line further revealed that the lipid biosynthetic process during the adipogenesis was significantly enriched.Co

关键词： Avian Adipogenesis CLN8 SNP Transcription regulation

Standard molar enthalpy of formation of uniform CdMoO_4 nano-octahedra

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Chinese Science Bulletin 2013年第26期58卷 3208-3212页

作者： WANG TengHui WANG LuDe GUO yunxiao LI YanFen fan GaoChao HUANG ZaiYin College of Chemistry and Chemical Engineering Guangxi University for Nationalities

Controllable synthesis of uniform and single-crystalline CdMoO4 nano-octahedra has been successfully realized at large-scale by a facile reverse-microemulsion route at room temperature. The structures, compositions and morphologies of the as-prepared products were characterized in detail by X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM), respectively. According to the thermochemical cycle, the relationship between the standard molar enthalpy of formation of nano-CdMoO4 and bulk CdMoO4 was proposed for the first time. In combination with micro-calorimetry, the standard molar enthalpies of formation at 298.15 K of as-ynthesized CdMoO4 nano-octahedra were ob-tained.

关键词：标准摩尔生成焓八面体纳米场发射扫描电子显微镜 X-射线粉末衍射透射电子显微镜 FE-SEM 反向微乳液

Region-of-interest micro-focus computed tomography based on an all-optical inverse Compton scattering source

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Matter and Radiation at Extremes 2020年第6期5卷 36-41页

作者： Yue Ma Jianfei Hua Dexiang Liu yunxiao He Tianliang Zhang Jiucheng Chen fan Yang Xiaonan Ning Zhongshan Yang Jie Zhang Chih-Hao Pai Yuqiu Gu Wei Lu Department of Engineering Physics Tsinghua UniversityBeijing 100084China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering PhysicsMianyangSichuan 621900China

Micro-focus computed tomography(CT),which allows the hyperfine structure within objects to be reconstructed,is a powerful nondestructive testing tool in many fields.However,current x-ray sources for micro-focus CT are typically limited by their relatively low photon energy and low flux.An all-optical inverse Compton scattering source(AOCS)based on laser wakefield acceleration can generate intense quasi-monoenergetic x/gamma-ray pulses in the kilo-to megaelectronvolt range with micrometer-level source size,and its potential application for micro-focus CT has become very attractive in recent years because of the rapid progress made in laser wakefield acceleration.Reported here is a successful experimental demonstration of high-fidelity micro-focus CT using an AOCS(∼70 keV)by imaging and reconstructing a test object with complex inner structures.A region-of-interest CT method is adopted to utilize the relatively small field of view of the AOCS to ensure high spatial resolution.This demonstration of AOCS-based region-of-interest micro-focus CT is a key step toward its application in the field of hyperfine nondestructive testing.

关键词： scattering optical source

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蛇毒血凝酶质控关键技术研究进展

中国药物警戒 2023年第10期20卷 1195-1200页

作者：刘博郭云霄刘莉莎范慧红中国食品药品检定研究院北京102629 国家药品监督管理局化学药品质量研究与评价重点实验室北京102629 中国药科大学药学院江苏南京210009

近年来,随着蛇毒血凝酶在临床中的广泛应用,对其产品质量的要求也在不断提高。但受限于产品的复杂性以及技术手段的制约,其质控关键技术的发展,尤其是结构表征、纯度分析以及效价测定等质控项目越来越难以满足日趋严格的质控要求。本综... 详细信息

近年来,随着蛇毒血凝酶在临床中的广泛应用,对其产品质量的要求也在不断提高。但受限于产品的复杂性以及技术手段的制约,其质控关键技术的发展,尤其是结构表征、纯度分析以及效价测定等质控项目越来越难以满足日趋严格的质控要求。本综述参考了国内外药典和其他蛋白类药物的最新研究进展,对蛇毒血凝酶药物的结构特征、纯度以及效价测定方法进行系统的总结和展望,希望能够对血凝酶类药品质控水平的全面提升提供参考。

关键词：血凝酶质量控制一级结构高级结构纯度活性蛇毒

FDN-C对高塑性黏土力学特性的影响与机理分析

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硅酸盐通报 2023年第5期42卷 1822-1830页

作者：刘云霄顾凡周辉崔桓荣习婷长安大学建筑工程学院西安710061

为考察萘系减水剂(FDN-C)在土体固化中的应用效果,在高塑性黏土中掺加不同用量FDN-C,与木质素磺酸钙(CA-LS)对比,分析其对压实荷载、无侧限抗压强度等力学性能的影响,并对固化处理后试样粒度、微观结构、结合水以及矿物成分和官能团等... 详细信息

为考察萘系减水剂(FDN-C)在土体固化中的应用效果,在高塑性黏土中掺加不同用量FDN-C,与木质素磺酸钙(CA-LS)对比,分析其对压实荷载、无侧限抗压强度等力学性能的影响,并对固化处理后试样粒度、微观结构、结合水以及矿物成分和官能团等进行分析,研究FDN-C对土壤颗粒的作用机理。结果表明:与CA-LS类似,FDN-C也可起到降低压实荷载,提高土体无侧限抗压强度的作用,在掺量超过土样质量的0.7%后,掺加FDN-C试样的压实荷载更低,添加两种减水剂试样的无侧限抗压强度相当;FDN-C和CA-LS均可通过分散土中的“假粉粒”,降低土颗粒表面结合水膜厚度及减少颗粒间距,使土颗粒间更密实,从而提高土体的工程性质;不同的是,CA-LS降低弱结合水膜厚度能力较强,FDN-C降低强结合水膜厚度能力较强。CA-LS分子中较多可交联的游离空位使其具有一定的粘合性,可以使土颗粒更好地胶结到一起,而未发现FDN-C有类似作用。

关键词： FDN-C CA-LS 高塑性黏土结合水无侧限抗压强度压实荷载

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基于HFACS模型的化工事故致因分析

中国安全科学学报 2018年第9期28卷 81-86页

作者：王晶樊运晓高远中国地质大学(北京)工程技术学院

为探究我国化工企业安全管理应重点防范的问题,首先,基于化工事故特点,识别人因分析和分类系统(HFACS)中各致因类别在化工领域的具体表现形式;然后,完善HFACS模型,并以某化工企业2012--2016年的102起事故为样本,应用该模型分析事故致因... 详细信息

为探究我国化工企业安全管理应重点防范的问题,首先,基于化工事故特点,识别人因分析和分类系统(HFACS)中各致因类别在化工领域的具体表现形式;然后,完善HFACS模型,并以某化工企业2012--2016年的102起事故为样本,应用该模型分析事故致因,针对具体致因提出相应的控制与改善措施。结果表明:员工的不安全行为主要包括习惯性违规和技能型失误,其主要形式为未对设备/工艺进行风险评估;不安全行为的前提条件主要源于操作者注意力不集中、警惕性不强以及作业时未穿戴个人保护设备(PPE);不安全监管的主要形式为未进行监督和风险评估;组织影响主要形式为安全氛围未形成。

关键词：化工事故人因分析和分类系统(HFACS) 事故致因个人保护设备(PPE) 不安全行为

基于NEBOSH认证的我国高校安全工程专业职业健康类课程体系设置研究

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安全与环境工程 2020年第2期27卷 98-103页

作者：云霞皓月樊运晓中国地质大学(北京)工程技术学院北京100083

职业健康类课程是安全工程专业知识体系的重要组成部分,如何在实践中优化我国高校职业健康类课程体系的设置是一个被广泛关注的问题。以培养安全工程专业学生职业健康知识和技能为目标,基于课程改革的重要性,通过对比我国高校安全工程... 详细信息

职业健康类课程是安全工程专业知识体系的重要组成部分,如何在实践中优化我国高校职业健康类课程体系的设置是一个被广泛关注的问题。以培养安全工程专业学生职业健康知识和技能为目标,基于课程改革的重要性,通过对比我国高校安全工程专业职业健康类课程教材与英国国家职业安全与健康考试中心(NEBOSH)教材职业健康相关部分内容,列出了中英教材各门课程所涉及的知识点,对其进行了模块化分析,发现两种教材在课程体系设置结构和内容方面存在差异。研究表明我国高校安全工程专业职业健康类课程体系设置可以从减小交叉性、建立体系化思想、提高与实践衔接紧密度等方面进行改善。

关键词：中国高校职业健康课程设置安全工程专业 NEBOSH教材比较研究

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双马达主被动复合驱动挖掘机回转系统特性

机床与液压 2023年第19期51卷 134-139页

作者：王帆黄伟男权龙郝云晓刘灿杰太原理工大学新型传感器与智能控制教育部重点实验室山西太原030024 江苏汇智高端工程机械创新中心有限公司江苏徐州221004

液压挖掘机由于上车回转平台转动惯量大、工作中高频次起制动,导致大量的制动动能转化为控制阀阀口热能浪费掉。为此,提出双马达主被动复合驱动挖掘机回转系统,主动系统采用阀口独立回路,应用泵阀复合、压力流量匹配控制策略抑制回转平... 详细信息

液压挖掘机由于上车回转平台转动惯量大、工作中高频次起制动,导致大量的制动动能转化为控制阀阀口热能浪费掉。为此,提出双马达主被动复合驱动挖掘机回转系统,主动系统采用阀口独立回路,应用泵阀复合、压力流量匹配控制策略抑制回转平台起动过程的节流和溢流损失,利用阀口独立回路多自由度控制的优点解决制动阶段转台冲击和反转问题;被动系统采用液压马达-蓄能器组合,回收利用回转平台制动动能;在空载制动过程中,通过增压缸向蓄能器补充油液。建立回转系统机电液联合仿真模型,并对所提系统的运行特性与能量特性进行分析。结果表明:满载和空载制动阶段蓄能器能量回收率分别为79%和72%,利用增压缸解决了蓄能器油液回收不足问题,较传统回转系统能耗降低54.3%。

关键词：回转系统主被动驱动阀口独立控制能量回收