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3D打印技术在加工设备中的应用影响及实例分析

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粘接 2024年第4期51卷 81-84页

作者：穆王君仝建波陕西工业职业技术学院陕西咸阳712000 陕西科技大学陕西西安710021

为提高基于3D打印的食品加工效果,以面粉的挤出式3D打印为研究对象,分析了水温、挤出头相对高度、喷嘴直径、水与面粉材料配比、活塞进给速率、挤出头相对速度6个工艺参数,以及3D打印效果的影响,并确定了最佳工艺参数组合为:水温100℃,... 详细信息

为提高基于3D打印的食品加工效果,以面粉的挤出式3D打印为研究对象,分析了水温、挤出头相对高度、喷嘴直径、水与面粉材料配比、活塞进给速率、挤出头相对速度6个工艺参数,以及3D打印效果的影响,并确定了最佳工艺参数组合为:水温100℃,挤出头相对平台高度为0.8 mm,喷嘴直径为0.6 mm,去离子水与面粉比例为0.8∶1,活塞进给速率为0.66 mm/min,挤出头相对平台速度为700 mm/min;应用结果表明,在上述最佳工艺参数组合下,3D打印的面团层数更高,精度更高,有效提高了面粉3D打印效果。

关键词：面粉3D打印面粉加工机械设备工艺参数优化

A novel comparative molecule/pseudo receptor interaction analysis

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Chinese Science Bulletin 2006年第15期51卷 1824-1829页

作者： ZHOU Peng tong jianbo TIAN Feifei LI Zhiliang College of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China Key Laboratory of Biomedical Engineering of Ministry of Education Chongqing 400044 China College of Chemistry and Chemical Engineering Shanxi University Taiyuan 030006 China

Comparative molecule/pseudo receptor interaction analysis (CoMPIA) is developed as a novel 3D-QSAR method by adding postulated pseudo receptor and GA-optimized probe into com- parative molecular field analysis (CoMFA). CoMPIA is used to find the pseudo receptor mode by opti- mizing probe distributions and to establish the opti- mal model of high qualities and good interpretations. Correlative coefficient R2, cross-validated correlative coefficient Q2 and root mean square error RMSEP of the resulting model are 0.940, 0.868 and 0.502, re- spectively by applying CoMPIA to quantitative struc- ture-activity relationship (QSAR) of 31 classical ster- oids.

关键词： CoMPIA 3D-QSAR CoMFA 分析化学

Three-dimensional holographic vector of atomic interaction field for quantitative structure-retention relationship of purine bases

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Chinese Science Bulletin 2006年第13期51卷 1557-1562页

作者： tong jianbo ZHOU Peng ZHANG Shengwan ZHOU Yuan MEI Hu ZENG Hui LI Meiping LI Zhiliang College of Chemistry and Chemical Engineering Shanxi University Taiyuan 030006 China College of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China Key Laboratory of Biomedical Engineering of Ministry of Education and Chongqing Municipality Chongqing 400044 China

A newly developed descriptor, three- dimensional holographic vector of atomic interaction field (3D-HoVAIF), was used to describe the chemical structures of purine bases. After variable screening by stepwise multiple regression (SMR) technique, a partial least square (PLS) regression model was built with 3D-HoVAIF. The model was satisfactory com- paring to reference since correlation coefficients of molecular modeling ( Rc 2um), cross- validation ( Qc 2um) and standard deviation of estimation (SD) were 0.966, 0.860 and 0.112, respectively, showing that the model had favorable estimation and prediction capa- bilities. It was illustrated that information related to retention data of purine bases could preferably be expressed by 3D-HoVAIF with definite physico- chemical meanings and easy structural interpretation for purine bases. It was illustrated that 3D-HoVAIF was to preferably express retention data of purine bases and had definite physicochemical significance. So 3D-HoVAIF was a useful structural expression technique for quantitative structure activity (or prop- erty or retention) relationships (QSAR/QSPR/QSRR) study, such as structural characterization and chro- matographic retention prediction.

关键词： 3D-HoVAIF 嘌呤 SMR PLS QSAR/QSPR/QSRR

Ti-Al-Fe体系bcc相扩散系数及原子移动性

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铸造技术 2024年第7期45卷 672-680页

作者：佟健博王向东聂晶晶黄毅白伟民程军中国航发北京航空材料研究院先进钛合金航空科技重点实验室北京100095 湘潭大学材料科学与工程学院湖南湘潭411105 湘潭大学材料设计及制备技术湖南省重点实验室湖南湘潭411105 西北有色金属研究院陕西省医用金属材料重点实验室陕西西安710016

钛合金中合金元素的扩散行为对材料的制备、加工、服役等过程至关重要。研究了1000和1100℃时Ti-Al-Fe体系bcc相中的元素扩散行为,制备了8对bcc-Ti-Al-Fe单相合金扩散偶。分别在1000℃/8.5 h和1100℃/7 h条件下进行扩散,利用EPMA技术测... 详细信息

钛合金中合金元素的扩散行为对材料的制备、加工、服役等过程至关重要。研究了1000和1100℃时Ti-Al-Fe体系bcc相中的元素扩散行为,制备了8对bcc-Ti-Al-Fe单相合金扩散偶。分别在1000℃/8.5 h和1100℃/7 h条件下进行扩散,利用EPMA技术测定成分-距离曲线。通过得到的成分-距离曲线,采用CALPHAD方法建立了Ti-Al-Fe体系bcc相的原子移动性数据库。在优化过程中,采用HitDIC软件得到了原子迁移率参数和互扩散系数。利用得到的原子移动性参数对扩散偶的扩散过程进行了模拟,计算结果与实验扩散特性(互扩散、组分-距离分布和扩散路径)一致,验证了该数据库的准确性。这一研究成果对于深入理解钛合金的微观组织演变和性能具有重要意义。

关键词：原子移动性扩散系数 Ti-Al-Fe合金 HitDIC软件 CALPHAD

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磷化钴微米花的制备及电化学性能

硅酸盐学报 2015年第4期43卷 538-544页

作者：仝建波温俊涛陕西科技大学化学与化工学院西安710021 教育部轻化工助剂化学与技术重点实验室陕西科技大学西安710021

通过简单的溶剂热,以水(H_2O)和无水乙醇(EtOH)作为混合溶剂,采用十六烷基三甲基溴化铵(CTAB)为表面活性剂成功地制备出均匀整齐的磷化钴(Co_2P)微米花。结果表明,所得产物为纯的斜方Co_2P,结晶度良好,其形貌为由大量长约1~1.5μm锥棒... 详细信息

通过简单的溶剂热,以水(H_2O)和无水乙醇(EtOH)作为混合溶剂,采用十六烷基三甲基溴化铵(CTAB)为表面活性剂成功地制备出均匀整齐的磷化钴(Co_2P)微米花。结果表明,所得产物为纯的斜方Co_2P,结晶度良好,其形貌为由大量长约1~1.5μm锥棒组成的花状。表面活性剂用量,水与无水乙醇体积比,反应时间对产物的形成均有一定的影响。其中,适量的CTAB能在水-乙醇体系中电离产生自由的十六烷基三甲铵阳离子(CTA^+),吸附在Co_2P晶体的某些晶面,对定向生长成花状形貌起重要作用。此外,以所制备Co_2P微米花作为锂电池负极材料,对其电化学性能进行研究。结果表明,样品的初始放电容量达到468.4mA·h/g,循环100次后,仍稳定在170mA·h/g左右。

关键词：磷化钴溶剂热电化学性能

Stochastic uncertain lubrication in gear transmission subjected to tribodynamic loading

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Friction 2024年第8期12卷 1741-1756页

作者： Zhou CHEN Haiming SHA Sheng LI Zheming tong Shuiguang tong State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China School of Mechanical Engineering Zhejiang UniversityHangzhou 310027China Wright State University 3640 Colonel Glenn HighwayDaytonOH 45435USA

A stochastic uncertain tribodynamic model is established for a spur gear pair for the first *** stochastic uncertainty of pinion rotation speed propagated to lubrication performance is *** probability density function of the minimum lubricant film thickness hmin evolves over time periodically at interval of an engagement *** between abrupt increase in meshing force and amplification of hmin uncertainty is *** and reliable lubrication performance can be achieved by suppressing the hmin uncertainty and decreasing the lubrication failure *** can be done by increasing lubricant viscosity,and decreasing input torque and uncertainty level of input rotation *** work lays a solid foundation for robust and reliability based optimization for tribodynamic gear system.

关键词： stochastic uncertainty gears elastohydrodynamic lubrication(EHL) tribodynamics

Selective nano-buckling improves the performance of graphene logic transistors

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National Science Review 2024年第2期11卷 95-96页

作者： tong Yang Ming Yang Department of Applied Physics The Hong Kong Polytechnic University Research Centre for Nanoscience and Nanotechnology The Hong Kong Polytechnic University

The massive integration of silicon-based transistors into modern electronic devices greatly increases power consumption and heat generation/dissipation[1]. In this concern, transistors based on atomically-thin graphene that exhibit high electric and thermoelectric conductivities with negligible contact resistance,

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Treatment of multisystem inflammatory syndrome in children

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World Journal of Pediatrics 2024年第4期20卷 325-339页

作者： tong tong Yi-Hua Jin Min Wang Fang-Qi Gong Department of Cardiology Children's HospitalZhejiang University School of MedicineNational Clinical Research Center for Child HealthNo.3333 Binsheng RoadHangzhou 310052China

Background Multisystem inflammatory syndrome in children(MIS-C),a relatively uncommon but severe pediatric complication,is associated with coronavirus disease 2019(COVID-19).A variety of treatment approaches,including intravenous immunoglobulins(IVIGs),glucocorticoids(GCs)and biologic agents,such as anakinra and infliximab,have been described for the management of COVID-19-related *** therapy is also ***,a well-developed treatment system has not been established,and many issues remain *** recently published articles related to the treatment of MIS-C have been ***,in this review,we identified relevant articles published recently and summarized the treatment of MIS-C more comprehensively and *** sources We reviewed the literature on the treatment of MIS-C through 20 September *** PubMed/Medline,Web of Science,EMBASE,and Cochrane Library databases were searched with the combination of the terms"multisystem inflammatory syndrome","MIS-C","PIMS-TS","therapy","treatment","drug","IVIG","GCs","intravenous immunoglobulin","corticosteroids","biological agent",and"aspirin".Results The severity of MIS-C varies,and different treatment schemes should be used according to the specific *** research and data collection are vital to better understand the pathophysiology and optimal management of *** MIS-Cis a disease involving multiple systems and has great *** the accumulation of additional experience,we have garnered fresh insights into its treatment ***,there remains a critical need for greater standardization in treatment protocols,alongside the pressing necessity for more robust and meticulously conducted studies to deepen our understanding of these protocols.

关键词： Coronavirus disease 2019-Corticosteroids Intravenous immunoglobulin Multisystem inflammatory syndrome in children-Treatment

Upconversion luminescence and temperature sensing performance of Er^(3+) ions doped self-activated KYb(MoO_(4))_(2) phosphors

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Journal of Rare Earths 2024年第8期42卷 1507-1513,I0004页

作者： Ye tong Wenpeng Liu Shoujun Ding School of Microelectronics and Data Science Anhui University of TechnologyMaanshan243002China Advanced Laser Technology Laboratory of Anhui Province Hefei230037China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei230031China

In this work,a series of self-activated KYb(MoO_(4))_(2) phosphors with various x at% Er^(3+) doping concentrations(x=0.5,1,3,5,8,10,15) was synthesized by the solid-state reaction *** phase structure of the as-prepared samples was analyzed by X-ray diffraction(XRD),XRD Rietveld refinement and Fourier transform infrared(FT-IR) *** as-prepared samples retain the orthorhombic structure with space group of Pbcn even Er^(3+) doping concentration up to 15 at%.High-purity upconversion(UC) green emission with green to red intensity ratio of 55 is observed from the as-prepared samples upon the excitation of 980 nm semiconductor laser and the optimum doping concentration of Er^(3+) ions in the self-activated KYb(MoO_(4))_(2) host is revealed as 3 at%.The strong green UC emission is confirmed as a two-photon process based on the power-dependent UC *** addition,the fluorescence intensity ratios(FIRs) of the two thermally-coupled energy levels,namely ^(2)H_(11/2) and ^(4)S_(3/2).of Er^(3+) ions were investigated in the temperature region 300-570 K to evaluate the optical temperature sensor behavior of the *** maximum relative sensitivity(S_(R)) is determined to be 0.0069 K^(-1) at300 K and the absolute sensitivity(S_(A)) is determined to be 0.0126 K^(-1) at 300 *** S_(A) of self-activated KYb(MoO_(4))2:Er^(3+)is almost twice that of traditional KY(MoO_(4))2:Er^(3+)/Yb^(3+)codoping *** results demonstrate that Er^(3+) ions doped self-activated KYb(MoO_(4))2 phosphor has promising application in visible display,trademark security and optical temperature sensors.

关键词： Er^(3+)ions doped KYb(MoO_(4))_(2) Self-activated phosphors Upconversion luminescence Solid-state reaction method Optical temperature sensors Rare earths