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改良QuEChERS技术结合超高效液相色谱-串联质谱法测定水产品中扑草净及其代谢物残留

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食品科学 2024年第3期45卷 185-192页

作者：彭婕穆迎春喻亚丽陈建武刘婷何力甘金华中国水产科学研究院长江水产研究所农业农村部淡水鱼类种质监督检验测试中心农业农村部水产品质量安全风险评估实验室(武汉)湖北武汉430223 中国水产科学研究院北京100141 农业农村部水产品质量安全控制重点实验室北京100141

采用改良QuEChERS技术作为前处理方法,建立了水产品中扑草净及其代谢物残留的超高效液相色谱-串联质谱分析方法。样品用乙腈提取,经增强型脂质去除吸附剂与Cleanert LipoNo组合净化,采用选择反应监测正离子模式测定,内标法定量。结果表... 详细信息

采用改良QuEChERS技术作为前处理方法,建立了水产品中扑草净及其代谢物残留的超高效液相色谱-串联质谱分析方法。样品用乙腈提取,经增强型脂质去除吸附剂与Cleanert LipoNo组合净化,采用选择反应监测正离子模式测定,内标法定量。结果表明:扑草净及其代谢物在1.0~500 ng/mL质量浓度范围内线性关系良好,确定系数R2大于0.992,方法检出限和定量限分别低至0.20μg/kg和0.50μg/kg,在草鱼、克氏原螯虾和中华绒螯蟹等基质的加标实验中呈现良好的准确度与精密度,平均加标回收率和相对标准偏差分别为74.4%~113.7%和3.17%~11.47%。经内标法校正,5种扑草净及其代谢物在不同水产品中的基质效应不明显。方法实现了水产品中扑草净及其代谢物的识别与定量分析,并通过检测药浴扑草净的克氏原螯虾阳性样品验证了方法的适用性。

关键词：超高效液相色谱-串联质谱水产品扑草净代谢物 QuEChERS

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肝脏恶性血管周上皮样细胞瘤的CT表现特征

中华肝胆外科杂志 2024年第2期30卷 103-107页

作者：潘阿善余捷翁珂冉谢品楠陈建武邱乾德浙江省乐清市人民医院放射科乐清325600 浙江省温州市人民医院影像科温州325000 浙江省杭州市师范大学医学部杭州311121 浙江省永嘉县人民医院放射科永嘉325100 浙江省乐清市人民医院病理科乐清325600

目的探讨肝脏恶性血管周上皮样细胞瘤(PEComa)患者的CT表现特征。方法回顾性分析2010年1月1日至2022年6月30日在浙江省乐清市人民医院、温州市人民医院和永嘉县人民医院经手术后病理确诊为肝脏恶性PEComa的9例患者的临床资料,其中男性2... 详细信息

目的探讨肝脏恶性血管周上皮样细胞瘤(PEComa)患者的CT表现特征。方法回顾性分析2010年1月1日至2022年6月30日在浙江省乐清市人民医院、温州市人民医院和永嘉县人民医院经手术后病理确诊为肝脏恶性PEComa的9例患者的临床资料,其中男性2例,女性7例,年龄47(43,56)岁。记录患者的CT表现,观察肿瘤大小、形态、界限、密度及增强后强化等情况。结果CT平扫结果显示9例肿瘤患者均为单发病灶,其中位于右肝5例,左肝3例,尾叶1例;中位肿瘤最大径为5.7 cm,范围3.3~16.0 cm。9例患者中:肿瘤形状呈圆形3例,类圆形4例,不规则形2例;界限清楚8例,不清楚1例;密度不均匀、低于肝脏9例;肿瘤有假包膜4例,瘤内含脂肪组织1例,坏死囊变6例。CT增强扫描结果显示9例患者于动脉期中度强化2例,显著强化7例;门静脉期及延迟期强化程度均明显下降,呈"快进快出"表现4例;门静脉期及延迟期仍持续强化,呈"快进慢出"表现4例;增强于动脉期、静脉期和延迟期均未见强化,病灶内见条状强化血管影1例;病灶周边可见明显增粗血管影5例。结论PEComa的CT表现为病灶呈圆形、类圆形及不规则形,界限清楚,瘤内易囊变,多呈不均匀低密度,增强动脉期显著强化,门静脉期快速退出或持续强化。

关键词：肝肿瘤恶性血管周上皮样细胞瘤体层摄影术,X线计算机

Design of the solar X-ray detector for the Macau Science Satellite-1B

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Earth and Planetary Physics 2023年第1期7卷 125-130页

作者： YongQiang Shi LianSheng Li jianwu chen FuChang Zuo XiaoPing Zhang ZhiWu Mei Li Wang Keke Zhang Beijing Institute of Control Engineering State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology

The solar X-ray detector(SXD) onboard the Macau Science Satellite-1B was designed to monitor solar flare bursts and to study the solar activity in the 25th solar cycle. The SXD includes two parts: a soft X-ray detection unit and a hard X-ray detection unit. Both the soft X-ray detection unit and the hard X-ray detection unit include two collimators, two X-ray detectors(a silicon drift detector and a cadmium-zinc-telluride detector), and a processing circuit. Compared with similar instruments, the energy range of the SXD is wider(1–600 ke V) and the energy resolution is better(150 e V at 5.9 ke V, 12% at 59.5 ke V, and 3% at 662 keV).

关键词： Macau Science Satellite-1B (MSS-1B) solar X-ray detector solar X-ray spectrometer

Near-zero-adhesion-enabled intact wafer-scale resist-transfer printing for high-fidelity nanofabrication on arbitrary substrates

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International Journal of Extreme Manufacturing 2024年第1期6卷 313-326页

作者： Zhiwen Shu Bo Feng Peng Liu Lei chen Huikang Liang Yiqin chen jianwu Yu Huigao Duan College of Mechanical and Vehicle Engineering National Engineering Research Centre for High Efficiency GrindingHunan UniversityChangsha 410082People’s Republic of China Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou 511300People’s Republic of China School of Mechanical Engineering Hunan University of Science and TechnologyXiangtan 411201People’s Republic of China Shenzhen Research Institute Hunan UniversityShenzhen 518000People’s Republic of China

There is an urgent need for novel processes that can integrate different functional nanostructures onto specific substrates,so as to meet the fast-growing need for broad applications in nanoelectronics,nanophotonics,and fexible *** direct-lithography methods are difficult to use on fexible,nonplanar,and biocompatible ***,this fabrication is usually accomplished by nanotransfer ***,large-scale integration of multiscale nanostructures with unconventional substrates remains challenging because fabrication yields and quality are often limited by the resolution,uniformity,adhesivity,and integrity of the nanostructures formed by direct ***,we proposed a resist-based transfer strategy enabled by near-zero adhesion,which was achieved by molecular modification to attain a critical surface energy *** approach enabled the intact transfer of wafer-scale,ultrathin-resist nanofilms onto arbitrary substrates with mitigated cracking and wrinkling,thereby facilitating the in situ fabrication of nanostructures for functional *** this approach,fabrication of three-dimensional-stacked multilayer structures with enhanced functionalities,nanoplasmonic structures with~10 nm resolution,and MoS2-based devices with excellent performance was demonstrated on specific *** results collectively demonstrated the high stability,reliability,and throughput of our strategy for optical and electronic device applications.

关键词： resist-based transfer printing near-zero adhesion critical surface energy wafer-scale nanofabrication in situ fabrication optoelectronic devices

广东省宝石加工行业矽尘接触水平及防护设施现状

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职业与健康 2024年第12期40卷 1601-1605页

作者：徐海娟李小亮汪天尖苏世标陈建武广东省职业病防治院广东省职业健康工程技术研究中心国家卫生健康委粉尘危害工程防护重点实验室中国安全生产科学研究院

目的调查广东省宝石加工行业矽尘接触水平及防护设施现状。方法通过“广东省职业卫生质量控制平台”子系统“定期检测信息系统”筛选2020—2023年广东省宝石加工行业中使用原料及产品为珠宝玉石的48家用人单位,共80份检测报告进行调查... 详细信息

目的调查广东省宝石加工行业矽尘接触水平及防护设施现状。方法通过“广东省职业卫生质量控制平台”子系统“定期检测信息系统”筛选2020—2023年广东省宝石加工行业中使用原料及产品为珠宝玉石的48家用人单位,共80份检测报告进行调查。结果48家企业分布于全省10个地级市,主要集中于珠江三角洲地区,占前3位依次为深圳市、佛山市、东莞市,有51.3%来自于小型企业,48.8%来自于微型企业。游离二氧化硅含量为10.6%~84.3%,仍有8.8%的企业存在岗位接触水平超过职业接触限值,集中在开料工、切割工、雕刻工和抛光工。已有90%企业采取工程防护,如湿式作业、局部除尘设施等,仍有10.0%企业未设置防护设施。对不同规模企业的矽尘(呼尘)接触水平及采取的工程防护措施进行比较,差异无统计学意义(P>0.05)。结论广东省宝石加工行业仍需加强矽尘危害的源头控制和监督管理。

关键词：珠宝宝石矽尘接触水平工程防护

A 6-GHz ROM suitable for DDFS application in GaAs HBT technology

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Chinese Science Bulletin 2011年第21期56卷 2291-2296页

作者： chen jianwu WANG Li WU DanYu chen GaoPeng JIN Zhi LIU XinYu Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China Key Laboratory of Microelectronics Devices & Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Science and Technology Information Research Center PLA General Armament DepartmentBeijing 100142China

Read-only memory (ROM) is widely implemented as a phase-to-amplitude mapping block in direct digital frequency synthesizers (DDFS).This paper derives an equivalent model for the ROM in a DDFS to analyze and reduce the access time that is critical to the performance of the ***,the signal skew observed in the simulation waveform is *** proposed 64×3-bit ROM is integrated as a part of an 8-bit DDFS,which operates functionally at 6 *** results demonstrate the improvement in the spur free dynamic range.

关键词：直接数字频率合成器 ROM GHz GaAs 应用程序 HBT 技术只读存储器

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眶隔脂肪重置在眼袋和泪沟整形中的应用进展

中华整形外科杂志 2022年第5期38卷 578-582页

作者：陈建武南部战区总院医院烧伤整形科广州510010

眶隔脂肪重置可同时解决眼袋和泪沟问题, 近年已逐步成为眼袋整形手术中的常规辅助术式。随着下睑韧带和组织间隙的进一步明确, 眶隔脂肪重置术式不断推陈出新, 很多手术细节有较大改变, 尤见于内路眶隔脂肪重置术。该文就眶隔脂肪重置... 详细信息

眶隔脂肪重置可同时解决眼袋和泪沟问题, 近年已逐步成为眼袋整形手术中的常规辅助术式。随着下睑韧带和组织间隙的进一步明确, 眶隔脂肪重置术式不断推陈出新, 很多手术细节有较大改变, 尤见于内路眶隔脂肪重置术。该文就眶隔脂肪重置的历史和解剖进行回顾, 并对手术中所涉及的手术入路、眶隔处理、脂肪重置层次、脂肪固定方式和并发症等关键问题进行了全面系统综述。

关键词：眶隔脂肪重置眶隔脂肪释放眼袋泪沟畸形下睑成形术

ON-LINE STATE PREDICTION OF ENGINES BASED ON FLAT NEURAL NETWORK

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Chinese Journal of Mechanical Engineering 2001年第1期14卷 51-56页

作者： Xi Gang Zhang jianwu chen Li School of Mechanical Engineering, Shanghai Jiaotong University 上海交通大学机械工程学院上海

A flat neural network is designed for the on line state prediction of engine. To reduce the computational cost of weight matrix, a fast recursive algorithm is derived according to the pseudoinverse formula of a partition matrix. Furthermore, the forgetting factor approach is introduced to improve predictive accuracy and robustness of the model. The experiment results indicate that the improved neural network is of good accuracy and strong robustness in prediction, and can apply for the on line prediction of nonlinear multi input multi output systems like vehicle engines.

关键词： Engine model Neural network On line prediction Nonlinear system

Detector-grade perovskite single-crystal wafers via stress-free gel-confined solution growth targeting high-resolution ionizing radiation

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Light(Science & Applications) 2023年第5期12卷 754-765页

作者： Yilong Song Lixiang Wang Yongqiang Shi Weihui Bi jianwu chen Mingwei Hao Anran Wang Xueying Yang Yuan Sun Fan Yu Liansheng Li Yanjun Fang Deren Yang Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Beijing Institute of Control Engineering Beijing 100190China Science and Technology on Space Intelligent Control Laboratory Beijing 100190China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024China

Solution-processed organic‒inorganic halide perovskite(OIHP)single crystals(SCs)have demonstrated great potential in ionizing radiation detection due to their outstanding charge transport properties and low-cost ***,the energy resolution(ER)and stability of OIHP detectors still lag far behind those of melt-grown inorganic perovskite and commercial CdZnTe counterparts due to the absence of detector-grade high-quality OIHP ***,we reveal that the crystallinity and uniformity of OIHP SCs are drastically improved by relieving interfacial stress with a facial gel-confined solution growth strategy,thus enabling the direct preparation of large-area detector-grade SC wafers up to 4 cm with drastically suppressed electronic and ionic *** resultant radiation detectors show both a small dark current below 1 nA and excellent baseline stability of 4.0×10^(-8) nA cm^(-1) s^(-1) V^(-1),which are rarely realized in OIHP ***,a record high ER of 4.9% at 59.5 keV is achieved under a standard 241Am gamma-ray source with an ultralow operating bias of 5 V,representing the best gamma-ray spectroscopy performance among all solution-processed semiconductor radiation detectors ever reported.

关键词： resolution confined stress