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灌区管道输水灌溉工程节水改造技术的应用

中国高新科技 2024年第6期 135-137页

作者：李立兵焦作市引沁广利灌区服务中心河南焦作459000

文章主要探究了低压管道输水灌溉工程节水改造系统的设计与应用。从某灌区选取10000亩试验区,布置了由取水工程、渠首工程、管道工程、灌溉工程等组成的灌区管道输水灌溉系统。该系统利用地形的自然高差形成压力水头,将水源地的水输送... 详细信息

文章主要探究了低压管道输水灌溉工程节水改造系统的设计与应用。从某灌区选取10000亩试验区,布置了由取水工程、渠首工程、管道工程、灌溉工程等组成的灌区管道输水灌溉系统。该系统利用地形的自然高差形成压力水头,将水源地的水输送到灌区各处。从实际应用情况看,文章设计的这套节水改造管道输水灌溉系统,在满足灌区农田灌溉需求的基础上,表现出节约用水、造价低廉、施工便捷、使用寿命长等多种优势,在低山丘陵地区的灌区具有推广应用价值。

关键词：管道输水灌溉工程节水改造沿程水头损失分水调压井

Recent progress on lanthanide complexes/clay minerals hybrid luminescent materials

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Journal of Rare Earths 2022年第9期40卷 1360-1370,I0001页

作者： Ga Zhang Lefu Mei Junjie Ding ke Su Qingfeng Guo Guocheng Lv libing Liao Beijing key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China School of Gemmology China University of GeosciencesBeijing 100083China

The unique luminescent performance of lanthanide complexes/clay minerals hybrid materials has been fascinating many researchers for recent decades.It not only retains the excellent luminescent characteristics of lanthanide complexes but also improves the poor stability of the complexes.In this article,we introduce the luminescence mechanism of lanthanide complexes and point out the necessity of their combination with clay minerals.After the analysis of the structure and interlayer environment differences of 1:1-type and 2:1-type clay minerals,the intercalation methods(covalent grafting and ion exchange)appropriate for different clay minerals are summarized with examples.Based on the luminescence characteristics of the hybrid materials,the applications of these materials as luminescent probes in recognition of specific metal cations and molecules,detection of pH value,and temperature are reviewed.Finally,the current problems in the preparation of lanthanide complexes/clay minerals hybrid luminescent materials and shortcomings that need improvement in their performance are analyzed,and the application prospect is forecast.

关键词： Luminescence Hybrid materials Lanthanide complexes Clay minerals Luminescent probes Rare earths

基于机器学习的预测模型对火电燃料燃烧效果的优化研究

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中国高新科技 2024年第7期 56-58页

作者：王利兵国能长源荆门发电有限公司湖北荆门448000

文章旨在提出一种基于机器学习的预测模型,用于优化火电燃料燃烧效果。使用了深度神经网络(DNN)和支持向量机(SVM)等机器学习算法,结合燃烧理论和工程实践,建立了燃烧效果预测模型。通过对燃料特性、燃烧参数及环境因素的综合分析,提出... 详细信息

文章旨在提出一种基于机器学习的预测模型,用于优化火电燃料燃烧效果。使用了深度神经网络(DNN)和支持向量机(SVM)等机器学习算法,结合燃烧理论和工程实践,建立了燃烧效果预测模型。通过对燃料特性、燃烧参数及环境因素的综合分析,提出了一种有效的优化策略,可提高火电厂燃料燃烧效率和减少排放。实验结果表明,所提出的模型具有良好的预测精度和鲁棒性,为火电行业提供了一种新的优化手段。

关键词：机器学习火电燃料燃烧效果预测模型优化策略

Conjugated polymer nanoparticles as fluorescence switch for selective cell imaging

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Chinese Chemical Letters 2020年第3期31卷 755-758页

作者： ke Peng Fengting Lv Huan Lu Jianwu Wang Hao Zhao libing Liu Shu Wang Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China College of Chemistry University of Chinese Academy of SciencesBeijing 100049China

Fluorescence switch plays a vital role in bioelectronics and bioimaging.Herein,we presented a new kind of facile electrostatic complex nanoparticles(ECNs)for fluorescence switching in cells and marking of individual cell.The ECNs were prepared by mixing positively charged poly(6-(2-(thiophen-3-yl)ethoxy)hexyl trimethylammonium bromide)(PT)and negatively charged diarylethene sodium salt(DAECOONa).DAE-COONa is a photoswitchable molecule which can be transformed between the ring-closed fo rm and ring-open form under the irradiation of UV or visible light.The closed-form of DAE-COONa can efficie ntly quench the fluorescence of PT through intermolecular energy transfer,while the open form of DAE-COONa does not influence the emission of PT.Thus,the fluorescence of ECNs can be modulated by light irradiation,and the ECNs with good fluorescence switching performance have been employed for fluorescence imaging and individual cell lighting up process successfully.We demonstrate that the electrostatic complex strategy provides a facile method to construct fluorescence switch fo r selective cell marking and imaging applications.

关键词： Electrostatic complex nanoparticles Conjugated polymers Fluorescence switch Cell imaging Selective cell lighting up

Mesoporous H-ZSM-5 nanocrystals with programmable number of acid sites as ＂solid ligands＂ to activate Pd nanoparticles for C-C coupling reactions

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Nano Research 2018年第2期11卷 874-881页

作者： Wenyu ke Tianlu Cui Qiuying Yu Mengying Wang libing Lv Honghui Wang Zhidong Jiang XinhHao Li Jiesheng Chen School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai China

In this work, we described a proof-of-concept method to promote the activity and selectivity of Pd nanoparticles for heterogeneous catalysis （exemplified by C-C coupling reactions） by using acid sites within a zeolite framework. The Pd nanoparticles were encapsulated inside the crystalline walls of mesoporous H-ZSM-5 leading to hybrid samples （denoted as Pd@mZ-x-H） with controlled number of acid sites. A linear relationship between the number of acid sites of the zeolite nanocrystals and the catalytic activities of the Pd nanoparticles in organic reactions was established. Moreover, the shape-dependent selectivity of Pd@mZ-x-H was not sacrificed when the final activity was enhanced.

关键词： Brgnsted acidity,palladium,HZSM-5,mesopores,Suzuki coupling

生活方式对高危孕妇发生妊娠期糖尿病的预防作用

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武汉大学学报（医学版） 2024年第5期45卷 594-597页

作者：徐嘉蔚林萱房莹崔静李智田丽槟郭红艳卢新妍丁家豪柯璐吴嘉慧武汉科技大学附属华润武钢总医院内分泌科湖北武汉430080 武汉科技大学医学院湖北武汉430062

目的:探讨采用生活方式干预来预防高危孕妇发生妊娠期糖尿病(GDM)的可行性。方法:自2020年12月至2022年2月,在武汉市共招募251名有GDM高危因素的孕妇,并随机分配其到干预组(n=128)与对照组(n=123)。对干预组进行生活方式干预,干预措施... 详细信息

目的:探讨采用生活方式干预来预防高危孕妇发生妊娠期糖尿病(GDM)的可行性。方法:自2020年12月至2022年2月,在武汉市共招募251名有GDM高危因素的孕妇,并随机分配其到干预组(n=128)与对照组(n=123)。对干预组进行生活方式干预,干预措施包括饮食建议、健康教育及体重管理,对照组定期孕期体检。所有孕妇在孕24~28周接受GDM筛查。结果:孕24~28周,干预组和对照组的GDM发生率分别为16.4%(21/128)和30.9%(38/123)(P<0.01)。干预组空腹血糖[(4.31±0.37)mmol/L]、服糖后1 h血糖[(7.10±1.73)mmol/L]、服糖后2 h血糖[(5.92±1.33)mmol/L]均低于对照组的(4.53±0.42)mmol/L、(7.53±1.68)mmol/L、(6.37±1.24)mmol/L(P<0.05)。结论:对高危孕妇进行生活方式干预能够预防GDM的发生。

关键词：生活方式干预妊娠期糖尿病预防

Mitochondria-targeted Ir@AuNRs as bifunctional therapeutic agents for hypoxia imaging and photothermal therapy

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Mitochondria-targeted Ir@AuNRs as bifunctional therapeutic a...

第十一届全国化学生物学学术会议

作者： libing ke Cheng Zhang Xinxing Liao Kangqiang Qiu Thomas W.Rees Yu Chen Zizhuo Zhao LiangNian Ji Hui Chao MOE key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-Sen University

Theranostic nanoagents are in great demand to meet the request of precision medicine. Herein, taken the advantage of Ir（III） complex and gold nanorod, bifunctional theranostic nano-agent, Ir@AuNRs, was developed[1]. Aimed at the over-expression azoreductase under hypoxic condition[2], Ir（III） complex employing azo-based turn-on fluorescent to images hypoxic level was synthesized and coated onto the surface of gold nanorod. The feasibility of dragging gold nanorod into mitochondria by Ir（III） complex was proved by ICP-MS, bio-TEM and co-staining experiment. The improvement of photothermal therapy efficiency and reduction of side effects was achieved, which was resulted from the specific mitochondria-targeting of Ir@AuNRs. The ability of Ir@AuNRs for hypoxia imaging and photothermal therapy were demonstrated in vitro and in vivo.

关键词： Ir complex mitochondria-targeted hypoxia imaging therapeutic agents

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发动机液氧冷却导管断裂失效分析

导弹与航天运载技术（中英文） 2023年第2期 31-35页

作者：宋亚轻周丽兵王柯王婷王振西安航天动力研究所西安710100 航天推进技术研究院西安710025

发动机连续地面长程试车过程中,1根Ф11mm×1.5mm的液氧冷却导管断裂,断口位于焊缝热影响区,焊缝断口形貌显示为疲劳断裂。通过晶相分析、动力学仿真、疲劳试验和微观形貌分析,断裂主要原因为导管焊缝背面余高呈现较大散差、焊缝热影响... 详细信息

发动机连续地面长程试车过程中,1根Ф11mm×1.5mm的液氧冷却导管断裂,断口位于焊缝热影响区,焊缝断口形貌显示为疲劳断裂。通过晶相分析、动力学仿真、疲劳试验和微观形貌分析,断裂主要原因为导管焊缝背面余高呈现较大散差、焊缝热影响区应力集中,导致寿命裕度降低、在发动机长时间工作条件下疲劳开裂。通过控制焊接余高和改为自动焊接工艺,可提高导管疲劳寿命。导管疲劳试验和地面试车验证了改进方法的有效性。

关键词：液氧煤油发动机导管断裂失效分析

Cr25Ni35Nb+MA离心铸造管U形热弯制造技术研究

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石油化工设备技术 2023年第5期44卷 40-43,I0003页

作者：江克史利冰巢湖学院机械工程学院安徽合肥230031 合肥通用机械研究院特种设备检验站有限公司安徽合肥230031

文章介绍了Cr25Ni35Nb+MA离心铸造管U形中频感应热弯的制造装置及成形工艺。通过分析离心铸造管材料性能,选择合理的弯前热处理工艺、推进速率、加热温度与冷却方式,同时,对U形管成形后壁厚减薄率、椭圆度及平面度变化规律进行分析,并... 详细信息

文章介绍了Cr25Ni35Nb+MA离心铸造管U形中频感应热弯的制造装置及成形工艺。通过分析离心铸造管材料性能,选择合理的弯前热处理工艺、推进速率、加热温度与冷却方式,同时,对U形管成形后壁厚减薄率、椭圆度及平面度变化规律进行分析,并通过渗透检测、微观组织观察、通球试验与水压试验检验成形后的产品质量,检验结果显示:弯前热处理降低了弯曲裂纹的产生;选取30~50 mm/s的推进速率、加热温度850~950℃并进行强风冷却,能够得到合格的弯管产品。

关键词： Cr25Ni35Nb+MA 离心铸造管 U形中频感应