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Experimental Investigation of fluid-structure interaction of composite hydrofoils in cavitating flow

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Journal of Hydrodynamics 2022年第2期34卷 207-213页

作者： Hou-sheng Zhang zhi-pu guo Qin Wu Han-zhe Zhang guo-yu Wang School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China Aviation Engineering School Air Force Engineering UniversityXian710038China

This paper experimentally studies the cavitating fluid-structure interaction of composite hydrofoils with different ply *** synchronous measurement system with high-speed camera and for laser Doppler vibrometer(LDV),the feedback pressure regulation system,and the flow rate control system are *** experimental results of the cavitation evolution show that,compared with the rigid hydrofoil,the composite hydrofoils with+45°ply angle and 0°ply angle accelerate the cavitation inception,and the composite hydrofoil with−45°ply angle delays the cavitation *** the same cavitation number,the cloud cavitation of the+45°laminated hydrofoil is the most severe,followed by that of the 0°laminated hydrofoil,and that of the−45°laminated hydrofoil is relatively weak and close to that of the rigid *** analyses of the structural vibration of the composite hydrofoils in different cavitation stages show that the three composite hydrofoils have no significant vibration at the incipient cavitation and the supercavitation,but relatively significant vibration is observed in the sheet and cloud *** vibration amplitude of the composite hydrofoil with+45°ply angle is the largest,followed by those of the−45°,0°laminated *** the sheet cavitation,the dominant frequencies of the structural vibration velocity of the+45°laminated hydrofoil and the−45°laminated hydrofoil are the first and second modal frequencies,but no explicit dominant frequency is observed for the 0°laminated *** the cloud cavitation,the dominant frequencies of the three composite hydrofoils mainly include the first modal frequency,the second modal frequency,and the cavity shedding frequency.

关键词： Cavitation fluid-structure interaction composite hydrofoil cavity induced vibration

TC4钛合金电火花沉积反应合成Ti(CN)涂层

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材料科学与工艺 2009年第3期17卷 406-409页

作者：郝建军卜志国赵建国刘洪杰马跃进南京科技大学河北农业大学机电工程学院河北保定071001

利用自制的电火花沉积充气密闭式保护装置和DZ-1400型电火花沉积机,以石墨为电极,以工业氮气为保护气和反应气,在TC4钛合金基体上制备Ti(CN)强化层.利用SEM分析了沉积层单沉积点表面形貌和组织结构,利用XRD测定了涂层物相组成,利用XPS... 详细信息

利用自制的电火花沉积充气密闭式保护装置和DZ-1400型电火花沉积机,以石墨为电极,以工业氮气为保护气和反应气,在TC4钛合金基体上制备Ti(CN)强化层.利用SEM分析了沉积层单沉积点表面形貌和组织结构,利用XRD测定了涂层物相组成,利用XPS分析了沉积层表面元素组成,利用SEM和AES分析了沉积层截面形貌、结合状态和元素组成.结果表明,沉积层是反应涂层,强化相由电极元素C、保护气体元素N和基体元素Ti反应生成,沉积层主要由TiC0.51N0.12相、Ti0.80V0.20相和C相组成,沉积层与基体结合致密,呈冶金结合.

关键词：钛合金电火花沉积反应合成涂层

华北地区几种常见园林绿化树种节水性和抗旱性评价

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河北农业大学学报 2008年第4期31卷 22-29页

作者：殷晓洁李玉灵卜志国尚国亮河北农业大学林学院河北保定071000 北京林业大学林学院北京100083

以压力-容积(PV)技术和切枝蒸腾法测定了华北地区6种常见绿化树种叶片的多项水分参数值(ψ_s^(sat)、ψ_w^(tlp)、RWC^(tlp)、V_a/V_p、ε^(max)、气孔关闭前后的组织相对含水率、d值、最大气孔蒸腾速率),并结合隶属函数法和聚类分析对... 详细信息

以压力-容积(PV)技术和切枝蒸腾法测定了华北地区6种常见绿化树种叶片的多项水分参数值(ψ_s^(sat)、ψ_w^(tlp)、RWC^(tlp)、V_a/V_p、ε^(max)、气孔关闭前后的组织相对含水率、d值、最大气孔蒸腾速率),并结合隶属函数法和聚类分析对各树种的节水性、抗旱性、保水能力、渗透调节能力进行了综合分析、比较和分类。结果表明:①针叶树为了保持光合作用的进行导致了低的保水能力,使得它们具有弱的节水性和强的抗旱性;阔叶灌木与此相反。②3种针叶树的节水性相近,圆柏抗旱性最佳,侧柏抗旱性居中,沙地柏抗旱性较差。③阔叶灌木中,大叶黄杨节水性最佳,金叶女贞和紫叶小檗的节水性相近;而大叶黄杨和紫叶小檗的抗旱性相近,均优于抗旱性最差的金叶女贞。

关键词：节水性抗旱性 PV技术切枝蒸腾

Social function scores and influencing factors in patients with residual depressive symptoms

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World Journal of Psychiatry 2025年第1期15卷 117-127页

作者： Zong-Ling Liao Xiao-Li pu zhi-Yi Zheng Jie Luo Department 1 of Psychiatry Gele Mountain Hospital of Chongqing Mental Health CenterChongqing 400030China Department of Psychology Chongqing Jiangjin District Psychiatric HospitalChongqing 402260China Department of Psychiatry Chongqing Third Social Welfare InstituteChongqing 400036China Women and Children’s Mental Health Center Affiliated Hospital of Chongqing Population and Family Planning Research InstituteChongqing 400020China

BACKGROUND At present,the influencing factors of social function in patients with residual depressive symptoms are still *** depressive symptoms are highly harmful,leading to low mood in patients,affecting work and interpersonal communication,increasing the risk of recurrence,and adding to the burden on *** the influencing factors of their social function is of great *** To explore the social function score and its influencing factors in patients with residual depressive *** This observational study surveyed patients with residual depressive symptoms(case group)and healthy patients undergoing physical examinations(control group).Participants were admitted between January 2022 and December *** functioning was assessed using the Sheehan Disability Scale(SDS),and scores were compared between *** influencing SDS scores in patients with residual depressive symptoms were analyzed by applying multiple linear regression while using the receiver operating characteristic curve,and these RESULTS The SDS scores of the 158 patients with depressive symptoms were 11.48±*** with the control group,the SDS scores and all items in the case group were *** scores were higher in patients with relapse,discon-tinuous medication,drug therapy alone,severe somatic symptoms,obvious residual symptoms,and anxiety scores≥*** history,medication compliance,therapy method,and residual symptoms correlated positively with SDS scores(r=0.354,0.414,0.602,and 0.456,respectively).Independent influencing factors included disease history,medication compliance,therapy method,somatic symptoms,residual symptoms,and anxiety scores(P<0.05).The areas under the curve for predicting social functional impairment using these factors were 0.713,0.559,0.684,0.729,0.668,and 0.628,respectively,with sensitivities of 79.2%,61.8%,76.8%,81.7%,63.6%,and 65.5%and specificities of 83.3%,87.5%,82.6%,83.3%,86.7%,and 92.1%,respectively.C

关键词： Depressive Residual symptoms Social function Influence factors

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确定含水层给水度新方法

江苏地质 2006年第4期30卷 290-293页

作者：李洋褚立孔蒲治国中国矿业大学资源与地球科学学院江苏徐州221008 中国矿业大学(北京)力建学院北京100083 淮南矿业集团潘北煤矿安徽淮南232074

给水度是矿井水文地质中的重要参数。对影响给水度的因素进行了综合分析,对给水度研究方法予以评价,结合试验研究,提出了一种更适合煤矿的测定含水层在天然状态下给水度的方法。

关键词：含水层给水度冻结法煤矿安徽

露天煤矿边帮烧变岩含水层黏土基帷幕墙注浆建造技术

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煤炭工程 2022年第12期54卷 67-72页

作者：蒲治国闫鑫丁湘纪卓辰马建国李哲贺晓浪张寅中煤能源研究院有限责任公司陕西西安710054 中煤冲击地压与水害防治研究中心内蒙古鄂尔多斯017000 陕西神延煤炭有限责任公司陕西榆林719000

为了减少边帮涌水对剥采作业的影响,降低矿坑排水作业对生态环境的损害,提出采用经济环保的黏土-水泥浆构筑黏土基柔性帷幕隔水墙,阻断烧变岩水及地表水进入矿坑的通道。以矿坑剥离的黏土为原料,通过现场试验获得黏土-水泥浆液配比,作... 详细信息

为了减少边帮涌水对剥采作业的影响,降低矿坑排水作业对生态环境的损害,提出采用经济环保的黏土-水泥浆构筑黏土基柔性帷幕隔水墙,阻断烧变岩水及地表水进入矿坑的通道。以矿坑剥离的黏土为原料,通过现场试验获得黏土-水泥浆液配比,作为建造帷幕隔水墙的注浆材料。帷幕墙建造完成后,矿坑排水量降幅89.82%,帷幕墙内外侧水位变化明显,矿坑周边植被得以较好恢复,与水泥-粉煤灰浆液方案相比,注浆材料费用节约近88万元。工程实践表明,黏土基帷幕墙阻水性能良好,经济效益突出,生态效益明显,实现了保水开采。

关键词：露天采矿边帮涌水烧变岩水黏土基帷幕墙黏土-水泥浆保水开采

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深部矿井水地下调蓄系统研究

煤炭工程 2022年第2期54卷 25-30页

作者：段东伟丁湘冯洁蒲治国刘凯祥贺晓浪中煤能源研究院有限责任公司陕西西安710054 中国矿业大学(北京)地球科学与测绘工程学院北京100083 中煤冲击地压与水害防治研究中心内蒙古鄂尔多斯017000

针对蒙陕地区深部矿井涌水量大、污水比例高、资源化利用率低等问题,研究利用采空区建设地下调蓄系统以稳定矿井涌水量、净化污水、降低水处理压力、提高矿井水利用率。根据煤层埋藏和开采条件,从调蓄系统建设条件和选址原则、容水量计... 详细信息

针对蒙陕地区深部矿井涌水量大、污水比例高、资源化利用率低等问题,研究利用采空区建设地下调蓄系统以稳定矿井涌水量、净化污水、降低水处理压力、提高矿井水利用率。根据煤层埋藏和开采条件,从调蓄系统建设条件和选址原则、容水量计算、水质保障、隔离工程建设条件、强矿压影响、安全性保障、经济和环境效益等角度,对矿井水地下储存、净化与调蓄进行了可行性研究。利用呼吉尔特矿区门克庆煤矿采空区建设形成矿井水调蓄系统示范工程,取得了良好的经济与环境效益。

关键词：储存调蓄矿井水净化采空区呼吉尔特矿区蒙陕地区

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网络课件及其在教改实践中的应用

苏州城市建设环境保护学院学报（社会科学版） 2002年第2期4卷 83-86页

作者：谭志凯濮强国苏州科技学院计算中心江苏苏州215011

文章论述网络教学的特点,网络课件的功能要求和设计原则,并介绍了作者把网络课件用于教改实践中的应用。作者率先在我院网站上发表自己制作的网络课件,在“办公自动化软件”课程教学中广泛地应用,配合课堂教学使用网络课件取得很好的实... 详细信息

文章论述网络教学的特点,网络课件的功能要求和设计原则,并介绍了作者把网络课件用于教改实践中的应用。作者率先在我院网站上发表自己制作的网络课件,在“办公自动化软件”课程教学中广泛地应用,配合课堂教学使用网络课件取得很好的实效,使学生的成绩明显提高,也为今后在远程教育中使用网络课件打下基础。

关键词：教育改革计算机应用计算机辅助教学网络教学网络课件

Platinum Atoms Dispersed in Single-chain Polymer Nanoparticles

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Chinese Journal of Polymer Science 2021年第4期39卷 441-446,I0005页

作者： zhi-Yu Hu Hong-Ting pu Jian-guo Wu Department of Polymeric Materials School of Materials Science&EngineeringTongji UniversityShanghai 201804China Key Laboratory of Advanced Civil Engineering Materials School of Materials Science&EngineeringTongji UniversityShanghai 201804China

The intramolecular cross-linking of single polymer chains can form single-chain nanoparticles(SCNPs),which have many *** this study,styrenic copolymers with pendent triphenylphosphine as the coordination site for platinum ions(Pt(Ⅱ))and benzocyclobutene as the latent reactive groups are *** groups in the chains can coordinate Pt(Ⅱ)and aid slight single-chain folding in dilute *** intramolecular cross-linking caused by the ring-open reaction of benzocyclobutene completes the single-chain collapse and forms stable SCNPs in dilute ***(Ⅱ)embedded in SCNPs can be further reduced to platinum atoms(Pt(0)).Pt(0)steadily and atomically dispersed in SCNPs exhibits better catalytic properties than normal polymer carried platinum particles do for the reduction of p-nitrophenol to p-aminophenol.

关键词： Single-chain Polymer nanoparticles Intramolecular cross-linking Platinum Coordination