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花岗岩机制砂混凝土性能的研究

价值工程 2024年第13期43卷 127-130页

作者：徐铭阳安徽理工大学淮南232001

探讨了花岗岩机制砂混凝土配比中的应用效果。通过调整不同参量的花岗岩机制砂替代率进行替代天然砂,分析了其对混凝土工作性能的影响,结果表明在合适的配比下,花岗岩机制砂能够显著提高混凝土的流动性、同时能减少减水剂的添加,但当花... 详细信息

探讨了花岗岩机制砂混凝土配比中的应用效果。通过调整不同参量的花岗岩机制砂替代率进行替代天然砂,分析了其对混凝土工作性能的影响,结果表明在合适的配比下,花岗岩机制砂能够显著提高混凝土的流动性、同时能减少减水剂的添加,但当花岗岩机制砂参量过大时,混凝土坍落度呈现下降趋势。并通过SEM扫描电镜从微观角度解释混凝土力学性能变化的原因结果。

关键词：机制砂混凝土花岗岩机制砂天然砂混凝土性能

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水洗唛器械包内清点卡在复用手术器械管理中的应用

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中国医疗器械信息 2024年第2期30卷 161-163页

作者：徐铭阳张丽陈旭酒泉市人民医院甘肃酒泉735000

目的:探讨自制水洗唛器械包内清点卡在复用手术室器械管理中的应用效果。方法:以2020年1月~12月本院所使用的复用手术器械为对照组,采用传统的橡胶类材质作为器械卡;以2021年1月~12月本院所使用的复用手术器械为观察组,采用复合材料制... 详细信息

目的:探讨自制水洗唛器械包内清点卡在复用手术室器械管理中的应用效果。方法:以2020年1月~12月本院所使用的复用手术器械为对照组,采用传统的橡胶类材质作为器械卡;以2021年1月~12月本院所使用的复用手术器械为观察组,采用复合材料制成的水洗唛,用专用打印机将器械包内器械名称、数量等信息以表格的形式打印在水洗唛上,将其放置在器械包内。比较两组器械清点卡清洗合格率、清洗过程中不良事件(器械遗失、器械损伤、院内感染等)发生情况、包装时间和手术室医护人员满意度评分。结果:抽检350件发现观察组清洗合格率明显高于对照组(P<0.05)。观察组器械遗失、器械损伤、院内感染及不良事件总发生率均明显低于对照组(P<0.05)。观察组包装时间明显短于对照组(P<0.05),手术室医护人员满意度评分明显高于对照组(P<0.05)。结论:在复用手术室器械管理中使用自制水洗唛器械包内清点卡能提高器械清点卡清洗合格率,减少清洗过程中不良事件发生,缩短包装时间,提高手术室医护人员满意度。

关键词：水洗唛器械卡手术室器械管理

Ag/g-C_(3)N_(4)复合材料可见光高效催化降解盐酸多西环素体系的构建

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现代化工 2024年第7期44卷 109-115页

作者：刘玉娇王霞许明洋符袅王绍仙何洁丽云南省昆虫生物医药研发重点实验室大理大学药学院云南大理671000

以三聚氰胺和硝酸银为前驱体制备了不同银负载量的氮化碳复合材料,通过TEM、XRD、UV-Vis、XPS、PL等技术对催化剂进行表征,结果表明,银的引入改变了氮化碳的结构和性质。以盐酸多西环素为污染物,考察了不同负载质量分数的Ag/g-C_(3)N_(4... 详细信息

以三聚氰胺和硝酸银为前驱体制备了不同银负载量的氮化碳复合材料,通过TEM、XRD、UV-Vis、XPS、PL等技术对催化剂进行表征,结果表明,银的引入改变了氮化碳的结构和性质。以盐酸多西环素为污染物,考察了不同负载质量分数的Ag/g-C_(3)N_(4)的光催化性能,结果表明,5.0%的Ag/g-C_(3)N_(4)对盐酸多西环素具有最佳的降解性能,在可见光下,Ag/g-C_(3)N_(4)在40 min内去除了85%的盐酸多西环素(20.00 mg/L)。与g-C_(3)N_(4)[k=0.172 L/(mol·min)]相比,Ag/g-C_(3)N_(4)体系[k=4.42 L/(mol·min)]的降解速率常数提高了25.7倍。化学捕获实验表明,超氧自由基和空穴是主要的活性物种。

关键词： Ag/g-C_(3)N_(4) 盐酸多西环素光催化降解反应机理

基于改进ECAPA-TDNN的法庭自动说话人识别

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科学技术与工程 2024年第27期24卷 11763-11773页

作者：万玫汐王华朋闫道申刘鹏展许铭洋中国刑事警察学院公安信息技术与情报学院沈阳110854

为提高法庭说话人识别的可靠性和准确性,促进法庭语音检验方法和过程的科学评价范式转化,提出了一种基于改进通道注意力机制融合时延神经网络(emphasized channel attention propagation aggregation time delay neural network,ECAPA-T... 详细信息

为提高法庭说话人识别的可靠性和准确性,促进法庭语音检验方法和过程的科学评价范式转化,提出了一种基于改进通道注意力机制融合时延神经网络(emphasized channel attention propagation aggregation time delay neural network,ECAPA-TDNN)模型的法庭自动说话人识别方法。该方法为提高模型的准确率和泛化能力,融合空间注意力机制、通道注意力机制和多头注意力机制。首先,选择训练效果最佳的频谱图与伽马频率倒谱系数(gammatone frequency cepstral coefficients,GFCC)融合特征输入网络模型,把训练完成的神经网络作为深度特征提取器,然后,在法庭证据似然比量化评估体系中评估语音证据的强度。实验结果表明:在VoxCeleb1数据集上,Cllr值为0.156,优于之前发表文献中的法庭自动说话人识别系统结果;在中文zhaishell数据集上,误判率和漏判率均为零,并且支持同源假设的似然比最小值为1.72×10^(6),支持非同源假设的似然比最大值为5.83×10^(-21)。该方法进一步提高了识别系统的可靠性和准确性,可以为法庭语音证据评估结论提供强有力的支撑。

关键词：说话人识别似然比 ECAPA-TDNN 注意力机制特征融合

Amino acids modified nanoscale zero-valent iron:Density functional theory calculations,experimental synthesis and application in the Fenton-like degradation of organic solvents

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Journal of Environmental Sciences 2024年第1期135卷 296-309页

作者： Xingchen yang Fucheng ming Jianlong Wang Lejin xu Department of Nuclear Engineering and Technology School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan 430074China Institute of Nuclear and New Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China Beijing Key Laboratory of Radioactive Wastes Treatment Tsinghua UniversityBeijing 100084China

To improve the adsorption and catalytic performance of heterogeneous Fenton-like catalysts for oil wastes,amino acids were used to modify nanoscale zero-valent iron(AA@Fe^(0)),which were applied in the Fenton-like degradation of organic solvents(tributyl phosphate and n-dodecane,named TBP and DD).Twelve amino acids,i.e.,glycine(Gly),alanine(Ala),leucine(Leu),proline(Pro),phenylalanine(Phe),methionine(Met),cysteine(Cys),asparagine(Asn),serine(Ser),glutamic acid(Glu),lysine(Lys)and arginine(Arg),were selected and calculated by density functional theory(DFT).The optimized structure,charge distribution,the highest occupied molecular orbital(HOMO),the lowest unoccupied molecular orbital(LUMO),interaction region indicator(IRI)isosurface map and adsorption energy of AA@Fe^(0),AA@Fe^(0)-TBP and AA@Fe^(0)-DD were studied,which indicated that Fe is more likely to approach and charge transfer with-COO and-NH_(3) on theα-carbon of amino *** is strong attraction between Fe and–COO,and Van der Waals force between Fe and-NH_(3),*** the interaction of AA@Fe^(0)with TBP and DD,Van der Waal force plays an important ***@Fe^(0)was synthesized in laboratory and characterized to investigate physicochemical *** Fenton-like degradation of organic solvents,the change of COD in water phase during the degradation process as well as the volume of the organic phase after the reaction were *** results of calculations combined with experiments showed that Ser-modified Fe^(0)performed the best in these amino acids,with 98%removal of organic solvents.A possible catalytic mechanism was proposed in which amino acids acted a linking role between Fe and organic solvents,activating H_(2)O_(2)to generate hydroxyl radicals for the degradation of organic solvents.

关键词： Amino acids Nanoscale zero-valent iron Density functional theory Organic solvents Fenton-like degradation

Zishenpingchan granules for the treatment of Parkinson＇s disease：a randomized,double-blind,placebo-controlled clinical trial

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Neural Regeneration Research 2018年第7期13卷 1269-1275页

作者： Qing Ye Xiao-Lei Yuan Can-Xing Yuan Hong-Zhi Zhang xu-ming yang Department of Neurology LONGHUA Hospital Shanghai University of Traditional Chinese Medicine Shanghai China Department of Neurology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Shanghai China Acupuncture and Tuina College of Shanghai University of Traditional Chinese Medicine Shanghai China

Levodopa preparations remain the preferred drug for Parkinson＇s ***,long-term use of levodopa may lead to a series of motor *** studies have shown that the combination of levodopa and Zishenpingchan granules（consisting of Radix Rehmanniae preparata,Lycium barbarum,Herba Taxilli,Rhizoma Gastrodiae,Stiff Silkorm,Curcuma phaeocaulis,Radix Paeoniae Alba,Rhizoma Arisaematis,Scorpio and Centipede） can markedly improve dyskinesia and delay the progression of Parkinson＇s disease,with especially dramatic improvements of non-motor ***,the efficacy of this combination has not been confirmed by randomized controlled *** current study was approved by the Hospital Ethics Committee and was registered in the Chinese Clinical Trial Register（registration number：Chi CTR-INR-1701194）.From December 2014 to December 2016,128 patients（72 males and 56 females,mean age of 65.78 ± 6.34 years） with Parkinson＇s disease were recruited from the Department of Neurology of Longhua Hospital and Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine in *** were equally allocated into treatment and control *** addition to treatment with dopamine,patients in treatment and control groups were given Zishenpingchan granules or placebo,respectively,for 24 *** efficacy was assessed using the Unified Parkinson＇s Disease Rating Scale,on-off phenomenon,Hoehn-Yahr grade,Scales for Outcomes in Parkinson＇s disease–Autonomic,Parkinson＇s disease sleep scale,Hamilton Anxiety Scale,Hamilton Depression Scale,Mini-Mental State Examination,and the Parkinson＇s Disease Quality of Life *** neural networks were used to determine weights at which to scale these *** results demonstrated that Zishenpingchan granules significantly reduced the occurrence of motor complications,and were useful for mitigating dyskinesia and non-motor symptoms of Parkinson＇s *** combination of Chin

关键词： nerve regeneration levodopa motion complications non-motor symptoms traditional Chinese medicine treatment artificial neural networks Zishenpingchan granules randomized controlled trials neurodegenerative diseases neural regeneration

Optimization Model Research on Major Underlying Factors in the Subhealth Condition Evaluation in 1 City and 7 Provinces in China

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World Journal of Traditional Chinese Medicine 2019年第2期5卷 88-94页

作者： Hong-Mei Ni Yu-Min He xu-ming yang Basic Medical College Shanghai University of Traditional Chinese Medicine College of Acupuncture and Massage Shanghai University of Traditional Chinese MedicineShanghaiChina

Background:The study aimed to analyze major underlying factors of the subhealth condition evaluation and find the optimization ***:Selected 524 cases of health state and 453 cases of subhealth state from the research objects.A genetic algorithm was applied to discover the optimization *** decision tree algorithm was used to find the main performance in the areas of physical,psychological,and social adaptation in the two populations which were the health state and the subhealth ***:To establish the optimization model,the author would set up a curve-fitting equation between reduction of health self-assessment score(S-G1)and white blood cell(WBC)value in routine blood,so as to establish the relationship between S-G1 and WBC and found the approximate minimum solution of each ***,the author would analyze the differences between two populations in WBC examination to seize the *** the differences of two populations in the areas of physical,psychological,and social adaptation by data mining and got the result that WBC of"the health state population"was higher than that of"the sub-health state population"in the index changes of *** problem in social adaptation area of the subhealth state population was more serious in degree than the health state population;the reason was *** WBC of the health state population was near or below 5.5079,the object may be in the state of ***,if WBC was near or below 4.35,it is possible to enter the"morbid state."

关键词： Curve fitting,decision tree,genetic algorithm,health state,subhealth state,white cell count value

Twisted Integration of Complex Oxide Magnetoelectric Heterostructures via Water‑Etching and Transfer Process

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Nano-Micro Letters 2024年第1期16卷 360-369页

作者： Guannan yang Guohua Dong Butong Zhang xu xu Yanan Zhao Zhongqiang Hu ming Liu State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research LaboratoryKey Laboratory of the Ministry of EducationEngineering Research Center of Spin Quantum Sensor ChipsUniversities of Shaanxi ProvinceSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Manipulating strain mode and degree that can be applied to epitaxial complex oxide thin films have been a cornerstone of strain *** recent years,lift-off and transfer technology of the epitaxial oxide thin films have been developed that enabled the integration of heterostructures without the limitation of material types and crystal ***,twisted integration would provide a more interesting strategy in artificial magnetoelectric heterostructures.A specific twist angle between the ferroelectric and ferromagnetic oxide layers corresponds to the distinct strain regulation modes in the magnetoelectric coupling process,which could provide some insight in to the physical *** this work,the La_(0.67)Sr_(0.33)MnO_(3)(001)/0.7Pb(Mg_(1/3)Nb_(2/3))O_(3)-0.3PbTiO_(3)(011)(LSMO/PMN-PT)heterostructures with *** *** angles were assembled via water-etching and transfer *** transferred LSMO films exhibit a fourfold magnetic anisotropy with easy axis along LSMO.A coexistence of uniaxial and fourfold magnetic anisotropy with LSMO[110]easy axis is observed for the 45°Sample by applying a 7.2 kV cm^(−1)electrical field,significantly different from a uniaxial anisotropy with LSMO[100]easy axis for the 0°*** fitting of the ferromagnetic resonance field reveals that the strain coupling generated by the 45°twist angle causes different lattice distortion of LSMO,thereby enhancing both the fourfold and uniaxial *** work confirms the twisting degrees of freedom for magnetoelectric coupling and opens opportunities for fabricating artificial magnetoelectric heterostructures.

关键词： Magnetoelectric heterostructures Twist angle Epitaxial lift-off Magnetic anisotropy Ferromagnetic resonance

Estimation of free core nutation parameters and availability of computing options

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Geodesy and Geodynamics 2024年第1期15卷 61-74页

作者： Weiwei yang Xiaoming Cui Jianqiao xu Qingchao Liu ming Qin State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China University of Chinese Academy of Sciences Beijing 100049China Hubei Luojia Laboratory Wuhan 430079China

The Earth’s Free Core Nutation(FCN) causes Earth tides and forced nutation with frequencies close to the FCN that exhibit resonance ***-precision superconducting gravimeter(SG) and very long baseline interferometry(VLBI) provide good observation techniques for detecting the FCN ***,some choices in data processing and solution procedures increase the uncertainty of the FCN *** this study,we analyzed the differences and the effectiveness of weight function and ocean tide corrections in the FCN parameter detection using synthetic data,SG data from thirty-one stations,and the 10 celestial pole offset(CPO) *** results show that significant discrepancies are caused by different computing options for a single SG *** stacking method,which results in a variation of0.24-5 sidereal days(SDs) in the FCN period(T) and 10^(3)-10^(4) in the quality factor(Q) due to the selection of the weighting function and the ocean tide model(OTM),can effectively suppress this *** statistical analysis results of synthetic data shows that although different weight choices,while adjusting the proportion of diurnal tidal waves involved,do not significantly improve the accuracy of fitted FCN parameters from gravity *** study evaluated a series of OTMs using the loading correction *** fitting of FCN parameters can be improved by selecting the mean of appropriate OTMs based on the evaluation *** the estimation of the FCN parameters based on the forced nutation,it was found that the weight function P_(1) is more suitable than others,and different CPO series(after 2009) resulted in a difference of 0.4 SDs in the T and of 103 in the *** estimated the FCN parameters for SG(T=430.4±1.5 SDs and Q=1.52×10^(4)±2.5×10^(3)) and for VLBI(T=429.8±0.7 SDs,Q=1.88×10^(4)±2.1×10^(3)).

关键词： Free core nutation Superconducting gravimeter Very long baseline interferometry Weight function Ocean tide model