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整铸转轮尺寸外观检测方法

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中国铸造装备与技术 2021年第3期56卷 73-77页

作者：赵树文共享铸钢有限公司宁夏银川750021

主要介绍水电整铸转轮的尺寸返修和控制要点并最终达到顾客要求,对整铸转轮不同部位的尺寸控制和返修要求进行分析,并针对问题提出有效的检测手段和质量控制措施。通过铸件尺寸检验标准化、返修标准化,最终达到提高铸件返修质量和提升... 详细信息

主要介绍水电整铸转轮的尺寸返修和控制要点并最终达到顾客要求,对整铸转轮不同部位的尺寸控制和返修要求进行分析,并针对问题提出有效的检测手段和质量控制措施。通过铸件尺寸检验标准化、返修标准化,最终达到提高铸件返修质量和提升效率的目的。

关键词：整铸转轮尺寸控制检测方法

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长白山林区3种基原细辛差异性成分比较

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植物研究 2025年第1期45卷 66-76页

作者：于芸泽于营赵书文金银萍逄世峰张浩邢丽伟孙语杨郭靖中国农业科学院特产研究所长春130112 吉林省中药材种植(养殖)重点实验室长春130112 东北林业大学园林学院哈尔滨150040 呼伦贝尔市海拉尔区农牧技术推广中心呼伦贝尔021000 伦敦国王学院英国伦敦WC2R 2LS

细辛挥发油中含有多种活性成分,可以作为细辛药材质量评价的指标;理清不同基原细辛挥发油成分差异,对细辛品质研究及应用具有重要意义。利用气质联用(GC-MS)法对不同基原细辛挥发油成分进行定性及相对定量分析,结合数据分析软件,通过聚... 详细信息

细辛挥发油中含有多种活性成分,可以作为细辛药材质量评价的指标;理清不同基原细辛挥发油成分差异,对细辛品质研究及应用具有重要意义。利用气质联用(GC-MS)法对不同基原细辛挥发油成分进行定性及相对定量分析,结合数据分析软件,通过聚类分析(HCA)、主成分分析(PCA)和正交偏最小二乘判别分析(OPLS-DA)找出不同基原细辛的差异性化合物。结果表明:25个批次的细辛样品共检测出59种化合物,按照不同基原划分为3类;细辛挥发性成分差异与细辛基原具有明显关联,确定α-松油醇、肉豆蔻醚、莰烯等11种化合物是不同基原细辛的差异性成分。基于化学计量学方法筛选到的差异成分可以区分不同基原细辛,同时可为细辛资源合理利用提供科学依据。

关键词：细辛挥发油化学计量学气相色谱质谱成分分析

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Fe(III) reduction due to low pe plus pH contributes to reducing Cd transfer within a soil-rice system

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JOURNAL OF HAZARDOUS MATERIALS 2021年 415卷 125668页

作者： Li, Shanshan Lei, Xiaoqin Qin, Luyao Sun, Xiaoyi Wang, Lifu zhao, shuwen Wang, Meng Chen, Shibao Chinese Acad Agr Sci Minist Agr & Rural Affairs Key Lab Plant Nutr & Fertilizer Inst Agr Resources & Reg Planning Beijing 100081 Peoples R China

Effect of Fe redox state caused by low soil pe+pH levels on Cd uptake by rice is unclear. Rice grown in pots of Cdcontaminated paddy soil were subjected to different irrigation regimes: flooding, intermittent flooding (Int-FL), and sustained soil moisture at 70% water holding capacity (WHC). Results showed low pe+pH (5.52 and 7.09) in flooding treatment significantly increased relative abundances of Fe-reducing bacteria (FeRB) (6.29% and 4.51%), especially members within the Clostridium, Geobacter and Desulfuromonadia genera. Stimulation of FeRB activity induced Fe(III) reduction and increased Fe2+ content in flooded soils, which promoted Cd sequestration in low-crystalline fraction of IP (IP-Feh-Cd) and Cd bonded to amorphous Fe-oxides (amFeox-Cd). The 24.9-62.4% higher amFeox-Cd content was the important factor for 20.4-44.2% lower CaCl2-extractable Cd content in flooding treatment than those in other treatments. Soil submergence reduced Cd uptake by rice at tillering and booting stages, the critical periods of Cd transport in the soil-rice system, which was attributed to the increases in dissolved Fe2+ and IP-Feh-Cd contents and decrease in CaCl2-Cd content. Therefore, maintaining flooding during the tillering and booting stages may be an effective strategy to reduce Cd uptake by rice cultivated in Cd-contaminated soil.

关键词： Fe(III) reduction Paddy soil Iron plaque Fe-reducing bacteria Soil pe plus pH variation

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Salt stress-induced changes in microbial community structures and metabolic processes result in increased soil cadmium availability

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SCIENCE OF THE TOTAL ENVIRONMENT 2021年 782卷

作者： Wang, Meng zhao, shuwen Wang, Lifu Chen, Shibao Li, Shanshan Lei, Xiaoqin Sun, Xiaoyi Qin, Luyao Chinese Acad Agr Sci Minist Agr & Rural Affairs Key Lab Plant Nutr & Fertilizer Inst Agr Resources & Reg Planning Beijing 100081 Peoples R China

Salt stress can cause significant changes to soil microbial community structure, metabolic processes, and the surrounding micro-environments. However, how these processes affect the availability of cadmium (Cd) remains poorly understood. Changes in soil microbial communities within different soil micro-environments (large-, macro-, small-aggregate and silt plus clay fractions) and their metabolic responses to saline stress in Cd contaminated soils were analyzed. Salt addition negatively affected the stability of soil aggregates and promoted Cd translocation from large soil aggregates into smaller clay/silt sized fractions. Comparatively, soil bacteria were more sensitive than fungi in their responses to salt addition, as more prominent variations in bacterial community structure were observed between AS (added salt) and CK (no added salt) treatments, determined via non metric multidimensional scaling analysis. Both bacteria and fungi showed greater diversity and richness in microaggregate fractions than in large aggregates, and salt addition decreased overall alpha diversity and altered microbial community composition. Among the node taxa, Sphingomonadaceae, Pyrinomonadaceae, Nitriliruptoraceae, Bacillaceae, Halomonadaceae and Pseudomonadaceae likely played critical roles in mediating Cd availability in soil micro-environments under saline stress. Furthermore, exposure to salt stress resulted in soil microbe metabolic reprogramming. The accumulation of tricarboxylic acid (TCA) cycle components and membrane lipid metabolites potentially contributed to observed increases in soil Cd availability and microbial Cd resistance. (c) 2021 Elsevier B.V. All rights reserved.

关键词： Cadmium Saline stress Soil aggregate Microbes Metabolic profiles

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Dynamic full-color tunability of high-performance smart windows utilizing absorption-emission effect

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NANO ENERGY 2021年 89卷

作者： zhao, shuwen Shao, Zewei Huang, Aibin Bao, Shanhu Luo, Hongjie Ji, Shidong Jin, Ping Cao, Xun Chinese Acad Sci Shanghai Inst Ceram State Key Lab High Performance Ceram & Superfine Dingxi 1295 Shanghai 200050 Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China Shanghai Univ Sch Mat Sci & Engn Shanghai 200444 Peoples R China Shanghai Univ Inst Conservat Culture Heritage Shanghai 200444 Peoples R China

The commercialization of vanadium dioxide (VO2) as energy-saving products currently suffers from nonadjustable visible transmittance, resulting in inferior solar regulation efficiency (Delta T-sol<15%), low luminous transmittance (T-lum<60%), and monotonous "brown-yellowish" appearance. Here, a concept of exploiting all solar spectra for modifying its inherent color as well as synchronously enhancing Delta T-sol has been accomplished on an ultraviolet (UV)-responsive photochromism/VO2 composite film. This structure by itself exhibits low T-lum even in a mild UV environment. We further introduce a fluorescence layer on top of photochromic layer to form a three-layer fluorescence/photochromism/VO2 structure (FPV), which could realize the conversion from UV to visible lights there to block most of the UV light and enhance the T-lum. Such FPV films that are optically manipulated display highly transparent before coloration and, further, can dynamically change to other colors according to different intensities of UV light. Moreover, the FPV films result in an increased solar energy regulation ability up to 20.1%, while maintaining 72.6% visible luminous transmittance. These results break shackles of inherent color and exceed the theoretical limit for traditional thermochromic VO2-smart windows, making them easily acceptable for users.

关键词： Vanadium dioxide (VO2) Dynamic controlling solar energy Thermochromic Full-color Fluorescence Photochromism

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Interface Engineering of Bimetallic Nitrides Nanowires as a Highly Efficient Bifunctional Electrocatalyst for Water Splitting

SSRN

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SSRN 2022年

作者： Dai, Ruijie Zhang, Hua Zhou, Weijie Zhou, Yao Ni, Zitao Chen, Ji zhao, shuwen zhao, Yifan Yu, Fayin Chen, Anran Wang, Rongfei Sun, Tao International Joint Research Center for Optoelectronic and Energy Materials Yunnan University Kunming Kunming650091 China School of Materials and Energy Yunnan University Kunming650091 China School of Engineering University of Edinburgh EdinburghEH9 3JW United Kingdom

Electrolytic water splitting offers a prodigious amount of hydrogen and oxygen production, which could satisfy the demand for clean energy for building the community of human destiny. Thus, as the key technology barrier, the development of a low-cost and high-performance bifunctional transition metal electrocatalyst toward water splitting is still a challenge. In this work, aiming to enhance electrocatalytic performance, the nickel molybdenum nitride heterostructure nanowire arrays were synthesized on nickel foam (Ni 3 N-Mo 2 N/NF) via hydrothermal strategy followed by a direct nitridation, from which the heterostructure nanowire was achieved. The self-supporting Ni 3 N-Mo 2 N/NF electrodes exhibits very low overpotentials of 66 and 252 mV at 10 mA cm -2 for the hydrogen evolution reaction and oxygen evolution reaction, respectively. When the cathode and anode were both Ni 3 N-Mo 2 N/NF, a current density of 10 mA cm -2 was achieved with only 1.55 V. This work provides a new idea for the design and preparation of non-precious metal-based transition metal nitride catalysts. © 2022, The Authors. All rights reserved.

关键词： Nanowires

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Manganese facilitates cadmium stabilization through physicochemical dynamics and amino acid accumulation in rice rhizosphere under flood-associated low pe plus pH

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JOURNAL OF HAZARDOUS MATERIALS 2021年 416卷 126079页

作者： Wang, Meng Wang, Lifu zhao, shuwen Li, Shanshan Lei, Xiaoqin Qin, Luyao Sun, Xiaoyi Chen, Shibao Chinese Acad Agr Sci Inst Agr Resources & Reg Planning Minist Agr & Rural Affairs Key Lab Plant Nutr & Fertilizer 12 Zhongguancun South St Beijing 100081 Peoples R China

Periodic flooding in paddy soils impacts redox behavior and induces variations in pe+pH levels. Manganese (Mn) is capable of reducing cadmium (Cd) uptake by rice. However, the processes involved in how Mn alters Cd mobilization under different pe+pH environments remain poorly understood. To investigate the mechanisms of Mn-mediated soil Cd-stabilization and subsequent inhibition of Cd uptake from flooded soils, we examined Cd immobilization in soil pot incubations, transcriptional changes in Cd-transport genes, and metabolomic analyses of roots and rhizosphere soils with or without Mn application. We found a decrease in extractable Cd concentration largely depended on irrigation-associated low pe+pH, exogenous Mn enhancement of Fe-Mn (oxyhydro) oxide-mediated Cd transformation, and Cd deposition in rice Fe/Mn plaques. Mn application led to striking effects on the expression of Cd-related genes eg. IRT, HMA, and NRAMP in rice root tissue. Exposure to Mn under variable pe+pH levels resulted in metabolic reprogramming of soil and rice roots. Mn induced amino acid synthesis in rice roots, leading to rhizosphere accumulation of free L-lysine, glycine, and glutamine, which can reportedly bind metal ions, forming complexes with Cd. Thus, secreted amino acids, low pe+pH, and free Mn can together comprise a multi-faceted approach to managing Cd toxicity in rice.

关键词： Metabolic profiles Amino acid secretion Soil cadmium availability Paddy soil Soil pe plus pH variation

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Role of Yttrium in Thermoluminescence of LYSO:Ce Crystals

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JOURNAL OF PHYSICAL CHEMISTRY C 2020年第32期124卷 17726-17732页

作者： Chen, Lu Ding, Dongzhou Fasoli, Mauro Wang, Tiantian Chen, Xiaopu zhao, shuwen Chen, Jie Sun, Yiyang Li, Jiang Wu, Yuntao Feng, He Chinese Acad Sci Shanghai Inst Ceram Shanghai 201899 Peoples R China Shanghai Univ Sch Mat Sci & Engn Shanghai 200444 Peoples R China Univ Milano Bicocca Dept Mat Sci I-20125 Milan Italy Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China R&D Ctr Shanghai Inst Ceram Shanghai 201899 Peoples R China

This paper presents a detailed study of the influence of yttrium (Y) concentration on thermally stimulated luminescence (TSL) of LYSO:Ce crystals and establishes the relationship between electron traps and scintillation properties. With the increase of Y concentration, the glow curve shifts toward higher temperatures and the trap depth increases gradually. Our results revealed two groups of electron traps with one shallow (E-t approximate to 0.10-0.26 eV) and one deep (E-t approximate to 1.00-1.21 eV). Our TSL results suggest that the amount of shallow traps varied with Y content has a positive correlation with energy resolution, while the amount of deep traps is inversely proportional to light output. In order to analyze the variation trend of trap depths and their mechanism in detail, we calculated the band gap with the PBE functional and VUV excitation spectra. The results show that the increase of band gap possibly leads to the increase of deep electron trap depth.

关键词： Crystals Light Electrical conductivity Order Kinetics

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Thermal management for EV power batteries based on INFO-ADRC algorithm

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INTERNATIONAL JOURNAL OF GREEN ENERGY 2025年

作者： Zhou, shuwen zhao, Siwen Duan, Xinrui Northeastern Univ Sch Mech Engn & Automat Shenyang 110819 Liaoning Peoples R China

During high-rate discharge, power batteries generate a considerable amount of heat. If this thermal energy is not dissipated effectively, the resulting rapid temperature rise can significantly impact the operational lifespan of the battery. Consequently, building a thermal control system that can keep the battery temperature status in an acceptable range and increase the homogeneity is vital. To this purpose, this study proposes an ADRC method that combines a BP neural network and an INFO algorithm to regulate the temperature environment suitable for the battery cluster's operation. The findings confirm the capability of the optimization algorithm to effectively reduce the battery's temperature fluctuation under different operating conditions. After optimization, the total temperature variation decreases by over 24%. In addition, INFO-ADRC technology meets the current requirements of the electric vehicle industry by keeping peak temperature deviations within 1 degrees C within the battery clusters.

关键词： Battery thermal management system Liquid-cooled thermal model BP neural network INFO algorithm ADRC

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文成县老年人失能发生现状及影响因素研究

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实用预防医学 2024年第4期31卷 411-414页

作者：张大聪刘金源周海珍赵淑雯李绍飞文成县疾病预防控制中心浙江文成325300 文成县大峃镇卫生院浙江文成325300

目的调查文成县老年人失能发生现状,分析其影响因素,为卫生健康部门研究制定老年人失能早期预防及干预管理策略提供依据。方法采用多阶段整群随机抽样方法,于2022年1—10月,调查文成县20个农村社区的705名老年人基本人口学特征、失能情... 详细信息

目的调查文成县老年人失能发生现状,分析其影响因素,为卫生健康部门研究制定老年人失能早期预防及干预管理策略提供依据。方法采用多阶段整群随机抽样方法,于2022年1—10月,调查文成县20个农村社区的705名老年人基本人口学特征、失能情况、健康状况、社会支持等情况,采用Pearson χ^(2)检验,多因素logistic回归模型分析老年人失能影响因素。结果文成县≥60岁老年人失能发生率为24.40%,其中轻度失能者占比最高,为82.56%。年龄≥80岁(OR=1.923,95%CI:1.083~3.416)、自评健康状况非常好/较好(OR=0.568,95%CI:0.380~0.849)、罹患慢性病数量(OR=1.980,95%CI:1.070~3.665)、近一年住院次数(OR=2.657,95%CI:1.713~4.120)及获得社会支持程度高(OR=0.451,95%CI:0.281~0.723)是老年人失能发生的影响因素。结论文成县≥60岁老年人失能发生率相对较高,但以轻度为主,卫生健康部门应进一步完善老年人失能预防及干预网络,重点针对高龄、慢病患病数多、健康状况不稳定、社会支持度低的老年人开展老年人失能风险评估,及早识别失能风险,尽早开展健康干预健康教育,提高老年人健康水平。

关键词：老年人失能发生率影响因素

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