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考虑原材料及制造因素的注塑模具费用建模

上海汽车 2024年第9期 9-14页

作者：陆嘉庆上汽大通汽车有限公司上海200438

为了优化注塑模具费用估计不准确的问题,提出了一种考虑原材料和制造因素的注塑模具费用模型。通过线性插补法,基于标杆零件描述目标零件的模仁、模框、顶出机构的费用。同时,根据流长与零件尺寸计算出热流道数量,进而描述热流道费用。... 详细信息

为了优化注塑模具费用估计不准确的问题,提出了一种考虑原材料和制造因素的注塑模具费用模型。通过线性插补法,基于标杆零件描述目标零件的模仁、模框、顶出机构的费用。同时,根据流长与零件尺寸计算出热流道数量,进而描述热流道费用。两者合计得到原材料费用。参考注塑机台吨位与生产能力,结合典型零件的生产周期,计算出符合零件尺寸的制造费用。最终根据原材料费用与制造费用占总模具费用比例关系,构建出注塑模具费用模型。利用NSGA-Ⅱ算法,基于实例验证了模型的有效性,为注塑模具费用估计提供了依据。

关键词：模具费用原材料费用热流道制造费用

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软黏土中吸力式三桶基础承载特性分析

太阳能学报 2024年第6期45卷 589-598页

作者：汪明元陆佳清巴盼锋程星磊鹿群中国电建集团华东勘测设计研究院有限公司杭州310014 天津城建大学天津市软土特性与工程环境重点实验室天津300384

采用弹塑性边界面本构模型,建立模拟黏土中三桶基础承载行为的三维数值方法,并通过对已有模型试验结果的预测验证数值方法的可行性。研究桶-土接触方式和加载方向对三桶基础承载行为的影响规律,探索三桶基础的水平循环承载特性。结果表... 详细信息

采用弹塑性边界面本构模型,建立模拟黏土中三桶基础承载行为的三维数值方法,并通过对已有模型试验结果的预测验证数值方法的可行性。研究桶-土接触方式和加载方向对三桶基础承载行为的影响规律,探索三桶基础的水平循环承载特性。结果表明,竖向单调荷载作用下三桶基础表现为“刺入型”剪切破坏特征,基础竖向受压失效位移约为0.07D(D为桶基础的直径);在摩擦接触条件下,0°水平加载(单桶受拉,双桶受压)极限承载力最小;在绑定接触条件下,60°水平加载(双桶受拉,单桶受压)极限承载力最小;循环荷载作用下迎风桶与背风桶之间逐渐增加的沉降差是三桶基础产生累积旋转的主要原因,且基础的旋转特性与水平循环荷载大小密切相关。

关键词：海上风电黏土循环荷载加载方向吸力桶

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水平荷载作用下三桶基础承载特性研究

天津城建大学学报 2024年第3期30卷 174-179页

作者：陆佳清鹿群郭少龙刘举天津城建大学天津市软土特性与工程环境重点实验室天津300384 天津城建大学土木工程学院天津300384

通过建立三维有限元模型,土体采用弹塑性边界面理论,设置不同的加载方向和重力荷载,探究三桶基础的水平承载特性;通过验证现有模型试验,证实数值方法的可行性.研究结果表明:60°水平加载(单桶受压,双桶受拉)极限承载力最小,基础的水平... 详细信息

通过建立三维有限元模型,土体采用弹塑性边界面理论,设置不同的加载方向和重力荷载,探究三桶基础的水平承载特性;通过验证现有模型试验,证实数值方法的可行性.研究结果表明:60°水平加载(单桶受压,双桶受拉)极限承载力最小,基础的水平极限承载力由受压桶控制;0°(双桶受压,单桶受拉)方向加载,自重荷载较小时,基础的承载力随着自重荷载的增大而增大,受拉桶的抗拔承载力决定了基础的总体承载力,自重荷载较大时,基础的水平承载力会减小,受压桶的抗压承载力决定了基础的总体承载力;60°方向加载时,基础的承载力随自重荷载的增大而减小,受压桶的沉降决定了基础的转角.

关键词：吸力桶软黏土加载方向极限承载力

归脾培元汤联合艾灸治疗晚期癌症恶病质脾肾两虚证患者临床观察

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河北中医 2024年第5期46卷 766-771页

作者：胡清清许宽杨姣张曦尧殷丹琴钱美芬卢佳庆江苏省宜兴市中医医院肿瘤科江苏宜兴214200 江苏省宜兴市中医医院心血管科江苏宜兴214200

目的观察归脾培元汤联合艾灸治疗晚期癌症恶病质脾肾两虚证患者的临床疗效。方法将80例晚期癌症恶病质脾肾两虚证患者按照随机数字表法分为2组,对照组40例在常规营养支持基础上予醋酸甲地孕酮分散片口服治疗,治疗组40例在常规营养支持... 详细信息

目的观察归脾培元汤联合艾灸治疗晚期癌症恶病质脾肾两虚证患者的临床疗效。方法将80例晚期癌症恶病质脾肾两虚证患者按照随机数字表法分为2组,对照组40例在常规营养支持基础上予醋酸甲地孕酮分散片口服治疗,治疗组40例在常规营养支持基础上予归脾培元汤联合艾灸足三里、涌泉穴治疗。2组均治疗4周。比较2组治疗前后中医证候评分、细胞免疫功能(T淋巴细胞亚群CD3^(+)、CD4^(+)、CD8^(+)及CD4^(+)/CD8^(+))、营养学指标[血红蛋白(Hgb)、白蛋白(ALB)、前白蛋白(PA)、瘦素(LP)、体质量],并统计2组疗效。结果治疗组总有效率77.50%(31/40),对照组总有效率55.00%(22/40),治疗组临床疗效优于对照组(P<0.05)。2组治疗后中医证候各项评分及总分均较本组治疗前降低(P<0.05),且治疗组治疗后食少纳呆、体倦乏力、腰膝酸软、神疲懒言及中医证候总分均低于对照组(P<0.05)。治疗组治疗后CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)均较本组治疗前升高(P<0.05),CD8^(+)降低(P<0.05),且治疗组治疗后CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)均高于对照组(P<0.05),CD8^(+)低于对照组(P<0.05)。治疗组治疗后Hgb、ALB、PA、LP、体质量均较本组治疗前升高(P<0.05),且治疗组治疗后均高于对照组(P<0.05)。结论归脾培元汤联合艾灸治疗能够缓解晚期癌症恶病质脾肾两虚证患者临床症状,增加体质量,提高临床疗效,可能与调节细胞免疫功能、改善营养状况等因素有关。

关键词：癌症恶病质中药疗法艾灸

王乐荣主任医师温督调神针刺法理论及临床应用

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中国中医药现代远程教育 2024年第7期22卷 45-48页

作者：杜科伟宋印景王海龙徐琳卢加庆王乐荣济宁市中医院针灸科山东济宁272000 山东省汶上县苑庄卫生院中医科山东汶上272512

“温督调神”针刺法是王乐荣主任医师在30余年的中医针灸临床实践和实验研究中,学习中医学、历代及当代医家经验,探索出的中医治疗疾病的有效方法。依据督脉理论及功能,选取百会、大椎、身柱、至阳、命门、腰俞、长强等穴位,予以毫火针... 详细信息

“温督调神”针刺法是王乐荣主任医师在30余年的中医针灸临床实践和实验研究中,学习中医学、历代及当代医家经验,探索出的中医治疗疾病的有效方法。依据督脉理论及功能,选取百会、大椎、身柱、至阳、命门、腰俞、长强等穴位,予以毫火针点刺及针刺,用以治疗神经内科、心血管、内分泌、脊柱关节、体虚易感等多学科、多系统的病证,治疗范围广泛,效果良好,值得临床推广应用。

关键词：温督调神法毫火针针刺疗法王乐荣名医经验

Pollution characteristics and quantitative source apportionment of heavy metals within a zinc smelting site by GIS-based PMF and APCS-MLR models

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Journal of Environmental Sciences 2024年第10期144卷 100-112页

作者： Huagang Lv Zhihuang lu Guangxuan Fu Sifang Lv Jun Jiang Yi Xie Xinghua luo jiaqing Zeng Shengguo Xue School of Metallurgy and Environment Central South UniversityChangsha 410083China Zhuzhou Qingshuitang Technology Co. Ltd.Zhuzhou 412000China New World Environment Protection Group of Hunan Changsha 410083China

The abandoned smelters present a substantial pollution threat to the nearby soil and *** this study,63 surface soil samples were collected from a zinc smelter to quantitatively describe the pollution characteristics,ecological risks,and source apportionment of heavy metal(loid)s(HMs).The results revealed that the average contents of Zn,Cd,Pb,As,and Hg were 0.4,12.2,3.3,5.3,and 12.7 times higher than the risk screening values of the construction sites,***,the smelter was accumulated heavily with Cd and Hg,and the contribution of Cd(0.38)and Hg(0.53)to ecological risk was 91.58%.ZZ3 and ZZ7 were the most polluted workshops,accounting for 25.7%and 35.0%of the pollution load and ecological risk,*** influence of soil parent materials on pollution was minor compared to various workshops within the *** with PMF,APCS-MLR and GIS analysis,four sources of HMs were identified:P1(25.5%)and A3(18.4%)were atmospheric deposition from the electric defogging workshop and surface runoff from the smelter;P2(32.7%)and A2(20.9%)were surface runoff of As-Pb foul acid;P3(14.5%)and A4(49.8%)were atmospheric deposition from the leach slag drying workshop;P4(27.3%)and A1(10.8%)were the smelting process of zinc *** paper described the distribution characteristics and specific sources of HMs in different process workshops,providing a new perspective for the precise remediation of the smelter by determining the priority control factors.

关键词： Smelter site Heavy metal(loid)s Source apportionment Positive matrix factorization Absolute principal component score-multiple linear regression

Topological and superconducting properties of monolayered CoN and CoP:A first-principles comparative study

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 98-108页

作者： jiaqing Gao Zhenyu Zhang Ping Cui International Center for Quantum Design of Functional Materials(ICQD) Hefei National Research Center for Physical Sciences at Microscale(HFNL)University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Two-dimensional systems that simultaneously harbor superconductivity and nontrivial band topology may serve as appealing platforms for realizing topological superconductivity with promising applications in fault-tolerant quantum ***,based on first-principles calculations,we show that monolayered Co N and Co P with the isovalent Fe Se-like structure are stable in freestanding form,even though their known bulk phases have no resemblance to *** two systems are further revealed to display intrinsic band inversions due to crystal field splitting,and such orderings are preserved with the inclusion of spin-orbit coupling(SOC),which otherwise is able to open a curved band gap,yielding a non-zero Z2 topological invariant in each *** a mechanism of topologicalization is distinctly contrasted with that identified recently for the closely related monolayers of CoX(X=As,Sb,Bi),where the SOC plays an indispensable role in causing a nontrivial band ***,we demonstrate that,by applying equi-biaxial tensile strain,the electron-phonon coupling strength in monolayered CoN can be significantly enhanced,yielding a superconducting transition temperature(Tc)up to 7-12 K for the Coulomb pseudopotential ofμ*=0.2-0.1,while the CoP monolayer shows very low Tc even under pronounced *** different superconducting behaviors can be attributed to different variations in lattice softening and electronic density of states around the Fermi level upon *** central findings enrich the understanding of different mechanisms of band inversions and topologicalization and offer platforms for achieving the coexistence of superconductivity and nontrivial band topology based on two-dimensional systems.

关键词： topological yielding otherwise

A Multiscale Model of Mass-Functionally Graded Beam-Fluid System Under Bending and Vibration Responses

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Acta Mechanica Solida Sinica 2024年第2期37卷 327-340页

作者： Lei Zhang Jianping Lin jiaqing Jiang Guannan Wang Department of Civil Engineering Zhejiang University866 Yuhangtang RoadHangzhou310058China Center for Balance Architecture Zhejiang UniversityHangzhou310007China College of Civil Engineering Huaqiao UniversityXiamen361021China Key Laboratory for Intelligent Infrastructure and Monitoring of Fujian Province Huaqiao UniversityXiamen361021China Department of Engineering Mechanics Zhejiang UniversityHangzhou310027China

In this paper,a multiscale model is developed for the mass functionally graded(FG)beam-fluid system to investigate its static and dynamic responses based on 3D printed porous beam free vibration tests,which are determined by two *** the microstructural level,the gradient variation is realized by arbitrary distribution of matrix pores,and the effective moduli under specific distribution are obtained using the micromechanics homogenization *** the meantime,at the structural level,the mechanical responses of FG porous beams subjected to mass loading are considered in a static fluid ***,the explicit expressions of local finite-element(FE)expressions corresponding to the static and dynamic responses are given in the *** present results are validated against numerical and experimental results from the literature and mechanical tests of 3D printed structures,with good agreement generally obtained,giving credence to the present *** this basis,a comprehensive parametric study is carried out,with a particular focus on the effects of boundary conditions,fluid density,and slenderness ratio on the bending and vibration of FG beams with several different gradations.

关键词： 3D printed test Mass functionally graded beam-fluid system Multiscale model Local finite-element expressions Static bending Free vibration

Multi-class classification of pathological myopia based on fundus photography

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Journal of Innovative Optical Health Sciences 2024年第6期17卷 125-136页

作者： jiaqing Zhao Guogang Cao Jiangnan He Cuixia Dai Shanghai Institute of Technology No.100 Haiquan RoadFengxian DistrictShanghaiP.R.China Shanghai Eye Diseases Prevention&Treatment Center Shanghai Eye HospitalSchool of MedicineTongji UniversityShanghai 200331P.R.China

Pathological myopia(PM)is a severe ocular disease leading to *** a traditional noninvasive diagnostic method,fundus color photography(FCP)is widely used in detecting PM due to its highfidelity and ***,manual examination of fundus photographs for PM is time-consuming and prone to high error *** automated detection technologies have yet to study the detailed classification in diagnosing different stages of PM *** this paper,we proposed an intelligent system which utilized Resnet101 technology to multi-categorically diagnose PM by classifying FCPs with different stages of *** system subdivided different stages of PM into eight subcategories,aiming to enhance the precision and e±ciency of the diagnostic *** achieved an average accuracy rate of 98.86%in detection of PM,with an area under the curve(AUC)of 98.96%.For the eight subcategories of PM,the detection accuracy reached 99.63%,with an AUC of 99.98%.Compared with other widely used multi-class models such as VGG16,Vision Transformer(VIT),E±cientNet,this system demonstrates higher accuracy and *** artificial intelligence system is designed to be easily integrated into existing clinical diagnostic tools,providing an e±cient solution for large-scale PM screening.

关键词： Fundus color photography pathological myopia deep learning Resnet101.