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A multicenter uroflowmetry study of healthy women in China

Chinese Medical Journal 2024年第10期137卷 1225-1227页

作者： Xiaodong Liu Lingfeng Meng Jiawen Wang Tianming Ma Benkang Shi Hai Huang Qingwei Wang Min Chen Limin Liao Hong Shen Zhongqing Wei Yuansong Xiao Tiejun pan Jian Ren Peng Zhang Xiaojun Tian Yaoguang Zhang Department of Urology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Graduate School of Peking Union Medical College Beijing 100730China Department of Urology Qilu HospitalShandong UniversityJinanShandong 250013China Department of Urology SUN YAT-SEN Memorial HospitalGuangzhouGuangdong 510235China Department of Urology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450003China Department of Urology Tongji HospitalTongji Medical College of Huazhong University of Science and TechnologyWuhanHubei 430030China Department of Urology China Rehabilitation Research CenterBeijing 100068China Department of Urology West China HospitalChengduSichuan 610041China Department of Urology The Second Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210011China Department of Urology General Hospital of Southern Theatre CommandGuangzhouGuangdong 510010China Department of Urology General Hospital of Central Theatre CommandWuhanHubei 430071China Department of Urology China-Japan Friendship HospitalBeijing 100029China Department of Urology Beijing Chao-Yang HospitalBeijing 100027China Department of Urology Peking University Third HospitalBeijing 100191China

Uroflowmetry is an uroflow measurement technique used to record the voided volume(VV)and flow rate,which can help clinicians objectively evaluate lower urinary tract ***,few uroflowmetry studies have focused on the female population,[1]especially on the uroflow curve standard ***,we sought to establish dependable uroflow reference values and nomograms for Chinese women and to evaluate the relationship between uroflow patterns and demographic data.

关键词： function. flowmetry analysis.

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中药调节下丘脑-垂体-卵巢轴干预围绝经期抑郁症的研究进展

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中华中医药学刊 2024年第8期42卷 186-190页

作者：常卓朱慧周雪明姜北孙延平邓贺尹雅静梁碧月潘雪匡海学黑龙江中医药大学黑龙江哈尔滨151000 中国中医科学院博士后科研流动站北京100700

围绝经期抑郁症(perimenopausal depressive disorder,PDD)是一种围绝经期女性高发的情绪障碍类疾病,严重威胁患病女性的生理、心理健康。PDD的发病机制与激素水平波动、单胺类神经递质减少、下丘脑-垂体-肾上腺轴(hypothalamic pituita... 详细信息

围绝经期抑郁症(perimenopausal depressive disorder,PDD)是一种围绝经期女性高发的情绪障碍类疾病,严重威胁患病女性的生理、心理健康。PDD的发病机制与激素水平波动、单胺类神经递质减少、下丘脑-垂体-肾上腺轴(hypothalamic pituitary adrenal axis,HPA)失调、下丘脑-垂体-卵巢轴(hypothalamic pituitary ovarian axis,HPO)失衡、γ-氨基丁酸(gamma-aminobutyric acid,GABA)系统失调等相关。其中,HPO失衡似乎更与PDD特殊的性别、发病时期关系密切,故也成了研究的热点。抑郁症一直是中医治疗的优势病种,特别是在中医理论指导下的中药治疗对于PDD的防治研究也具有丰富的理论基础与研究成果。通过对近5年的文献整理,围绕HPO轴在PDD中的作用,中医药调节HPO轴干预PDD的理论基础,中药复方、单味中药及中药单体化合物通过调节HPO轴治疗PDD的研究进展进行了综合性叙述。

关键词：中药下丘脑-垂体-卵巢轴围绝经期抑郁症

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Mathematical model of flow characteristic in multi-strand continuous casting tundishes

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 297-307页

作者： Hongwei pan Shusen CHENG School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

In this paper, the subject of mathematical model is a series of math expressions, which is used to calculate different regions＇ volume fraction and analyze flow characterization in multi-strand tundish. But research about mathematical model for multi-strand tundish is few, and so far, there has been no acknowledged math model for multi- strand tundish to describe its flow characteristic. If Sahai＇s model, which is originally proposed for the case of single-strand tundish （proposed in reference, and this model is widely used in the world）, is applied to describe flow feature in multi-strand tundish, the calculation results would be unreasonable. Based on the data of watermodel experiment results, the sum of each strand＇s dead region＇s volume fraction is bigger than 100%, and this obviously doesn＇T agree with reality; and the value of dead region＇s volume fraction is calculated to be minus according to mathematical simulation results data in another case. What＇s more, Sahai＇s model does not propose the standard of plotting the RTD-curve, and this makes scholars around the world can＇t achieve consensus of views about plotting RTD-curve. And the model doesn＇t consider the bypass flow and can＇t calculate its volume fraction, but bypass flow is critical to tundish metallurgy. And through Sahai＇s model, the calculation result of plug flow region＇s volume fraction is also not reasonable, because the model doesn＇t well describe the essence of plug flow. So these suggest that it is not reliable to apply Sahai＇s single-strand tundish model to multi-strand tundish case. Then a new model is attempted to propose in this paper for your discussion. In the new model, the standard of plotting RTD curve is definitely proposed, and relative calculation method is also proposed; and the feature of dead region is carefully studied and the model proposes a new method to calculate its volume fraction, and the calculation formula about its volume fraction can be adjustable according the actu

关键词： Tundish Residual time distribution (RTD) Bypass flow Dead region Water-model Mathematical simulation

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Unveiling the planar deformation mechanisms for improved formability in pre-twinned AZ31 Mg alloy sheet at warm temperature

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Journal of Magnesium and Alloys 2023年第12期11卷 4659-4678页

作者： Xiaohuan pan Lifei Wang Pengbin Lu Hua Zhang Guangsheng Huang Liuwei Zheng Bin Xing Weili Cheng Hongxia Wang Wei liang Kwang Seon Shin Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China National Engineering Laboratory for Industrial Big-data Application Technology Chongqing Innovation Center of Industrial Big-Data Co.Ltd.Chongqing 400707China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute for Advanced Studies in Precision Materials Yantai UniversityYantai 264005China National Engineering Research Center for Magnesium Alloys College of Materials Science&EngineeringChongqing UniversityChongqing 400044China Magnesium Technology Innovation Center School of Materials Science and EngineeringSeoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea

To investigate the role of pre-twins in Mg alloy sheets during warm planar deformation,the stretch forming is conducted at 200℃.Results suggest the formability of the pre-twinned AZ31 Mg alloy sheet is enhanced to 11.30 *** mechanisms for the improved formability and the deformation behaviors during the planar stretch forming are systematically investigated based on the planar stress *** Schmid factor for deformation mechanisms are calculated,the results reveal that planar stress states extremely affect the Schmid factor for{10-12}*** detwinning is activated and the prismatic slip is enhanced in the pre-twinned sheet,especially under the planar extension stress state in the outer ***,the thickness-direction strain is accommodated *** dynamic recrystallization(DRX)type is continuous DRX(CDRX)regardless of the planar stress ***,the CDRX degree is greater under the planar extension stress *** twin lattices deviate from the perfect{10-12}twinning relation due to the planar compression stress state and the *** basal texture is weakened when the planar stress state tends to change the texture components.

关键词： AZ31 Mg alloy sheet Planar stretch forming Planar stress states Continuous dynamic recrystallization {10-12}tensile twinning

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Magnesium and its alloys for better future——The 10th anniversary of journal of magnesium and alloys

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Journal of Magnesium and Alloys 2023年第10期11卷 3395-3398页

作者： Fusheng pan National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting TechnologiesChina

Fifteen years ago, when I first discussed the establishment of Journal of Magnesium and Alloys (JMA) with Prof. Karl Ulrich Kainer from Germany, the establishment of JMA was just a dream. In a flash, fifteen years have passed, and it has been ten years since the establishment of the Magnesium Alloy Journal. The dream has not only become a reality, but the impact on the Mg academic research and industry has exceeded our imagination.

关键词： alloys magnesium journal

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Bayesian seismic inversion for estimating fluid content and fracture parameters in a gas-saturated fractured porous reservoir

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Science China Earth Sciences 2019年第5期62卷 798-811页

作者： Xinpeng pan Guangzhi ZHANG School of Sciences China University of Petroleum (East China) Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology

Understanding the effects of in situ fluid content and fracture parameters on seismic characteristics is important for the subsurface exploration and production of fractured porous rocks. The ratio of normal-to-shear fracture compliance is typically utilized as a fluid indicator to evaluate anisotropy and identify fluids filling the fractures, but it represents an underdetermined problem because this fluid indicator varies as a function of both fracture geometry and fluid content. On the bases of anisotropic Gassmann's equation and linear-slip model, we suggest an anisotropic poroelasticity model for fractured porous reservoirs. By combining a perturbed stiffness matrix and asymptotic ray theory, we then construct a direct relationship between the PP-wave reflection coefficients and characteristic parameters of fluids(P-and S-wave moduli) and fractures(fracture quasi-weaknesses), thereby decoupling the effects of fluid and fracture properties on seismic reflection *** incorporating fracture quasi-weakness parameters, we propose a novel parameterization method for elastic impedance variation with offset and azimuth(EIVOA). By incorporating wide-azimuth observable seismic reflection data with regularization constraints, we utilize Bayesian seismic inversion to estimate the fluid content and fracture parameters of fractured porous rocks. Tests on synthetic and real data demonstrate that fluid and fracture properties can be reasonably estimated directly from azimuthal seismic data and the proposed approach provides a reliable method for fluid identification and fracture characterization in a gas-saturated fractured porous reservoir.

关键词： Fluid parameters Fracture parameters Fractured porous reservoir Poroelasticity theory Bayesian seismic inversion

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含建筑桩基的顺层岩质边坡桩锚支护体系振动台模型试验研究

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土木与环境工程学报（中英文） 2024年第2期46卷 11-22页

作者：吴曙光毛振南潘林薛尚铃徐革重庆大学土木工程学院库区环境地质灾害防治国家地方联合工程研究中心重庆400045 重庆电力高等专科学校发展规划与质量保障处重庆400053 中冶赛迪工程技术股份有限公司重庆400013

基于Bockinghamπ定理,对具有建筑桩基的顺层岩质边坡桩锚支护体系开展振动台模型试验,通过分析预应力锚索、建筑桩基的应变以及边坡坡顶加速度,研究支护体系的动力响应规律。结果表明,预应力锚索的应变在地震波加速度达到峰值时达到最... 详细信息

基于Bockinghamπ定理,对具有建筑桩基的顺层岩质边坡桩锚支护体系开展振动台模型试验,通过分析预应力锚索、建筑桩基的应变以及边坡坡顶加速度,研究支护体系的动力响应规律。结果表明,预应力锚索的应变在地震波加速度达到峰值时达到最大值,且上排锚索受力大于下排锚索,随着地震幅值的增大,最上排锚索锚固段率先发生滑移破坏失去锚固作用;建筑桩基应变最大值点位于滑动面以下一定深度,且远离边坡坡面的建筑桩基受力大于邻近边坡坡面的建筑桩基;坡顶各点峰值加速度随地震波幅值增大整体表现为线性增大,但在Wenchuan-Wolong波(0.55g)和Sin波(0.4g)工况时,各点峰值加速度相对有所下降,随着地震波幅值增大,各点峰值加速度放大系数在汶川波和正弦波作用下并非单调变化,而是表现为先减小后增大波动变化特点。

关键词：建筑桩基顺层岩质边坡桩锚挡墙振动台模型试验

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High order sub-cell finite volume schemes for solving hyperbolic conservation laws I: basic formulation and one-dimensional analysis

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Science China(Physics,Mechanics & Astronomy) 2017年第8期60卷 60-75页

作者： JianHua pan YuXin Ren School of Aerospace Engineering Tsinghua University

In this paper, a family of sub-cell finite volume schemes for solving the hyperbolic conservation laws is proposed and analyzed in one-dimensional cases. The basic idea of this method is to subdivide a control volume(main cell) into several sub-cells and the finite volume discretization is applied to each of the sub-cells. The averaged values on the sub-cells of current and face neighboring main cells are used to reconstruct the polynomial distributions of the dependent variables. This method can achieve arbitrarily high order of accuracy using a compact stencil. It is similar to the spectral volume method incorporating with PNPM technique but with fundamental differences. An elaborate utilization of these differences overcomes some shortcomings of the spectral volume method and results in a family of accurate and robust schemes for solving the hyperbolic conservation laws. In this paper, the basic formulation of the proposed method is presented. The Fourier analysis is performed to study the properties of the one-dimensional schemes. A WENO limiter based on the secondary reconstruction is constructed.

关键词： compact high order method sub-cell finite volume method unstructured grid

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机器人辅助腹腔镜自体舌黏膜补片输尿管成形术治疗输尿管狭窄的效果分析

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中华泌尿外科杂志 2024年第1期45卷 34-38页

作者：王昆潘迪罗宇婷罗光恒江克华贵州省人民医院泌尿外科贵阳550002

目的探讨采用机器人辅助腹腔镜自体舌黏膜补片输尿管成形术治疗输尿管狭窄的有效性和安全性。方法回顾性分析2020年12月至2022年8月贵州省人民医院收治的6例输尿管狭窄患者的临床资料。男3例,女3例;年龄(40.2±11.5)岁。术前均行泌尿系... 详细信息

目的探讨采用机器人辅助腹腔镜自体舌黏膜补片输尿管成形术治疗输尿管狭窄的有效性和安全性。方法回顾性分析2020年12月至2022年8月贵州省人民医院收治的6例输尿管狭窄患者的临床资料。男3例,女3例;年龄(40.2±11.5)岁。术前均行泌尿系B超、CT尿路造影和输尿管逆行造影等检查评估肾积水程度和输尿管狭窄情况。病变位于左侧2例,右侧4例;上段狭窄4例,中段狭窄2例;患侧肾盂分离3.2(2.1,4.2)cm,输尿管狭窄长度为3.8(2.5,4.3)cm(1.0~5.0cm),术前血肌酐90(71,97)μmol/L。所有患者均行机器人辅助腹腔镜自体舌黏膜补片输尿管成形术。术中充分暴露并纵行切开输尿管狭窄段,根据狭窄情况切取长2.5~5.0cm、宽1.0~1.5cm的舌黏膜,修剪后与狭窄段输尿管吻合修复输尿管狭窄。术中均于患侧输尿管内留置双J管1根。分析围手术期结果及并发症情况。比较治疗前后血肌酐和患侧肾孟分离情况。结果6例手术均顺利完成,手术时间(190.8±59.0)min,术中出血量中位值40(20,63)ml,术后术区引流管留置时间6(4,6)d,胃肠道功能恢复时间3(2,3)d,术后住院时间6(6,7)d。所有患者术后1周舌部伤口愈合良好,言语清晰;术后2周拔除尿管;术后拔除双J管时间8(6,10)周。术后第3个月复查肾功能及影像学检查,血肌酐79(71,104)μmol/L,患侧肾盂分离1.2(1.2,1.4)cm,均较术前明显改善。结论机器人辅助腹腔镜自体舌黏膜补片输尿管成形术治疗输尿管狭窄,具有创伤小、术后恢复快、围手术期并发症少等特点,是一种安全、有效的治疗方法。

关键词：输尿管疾病狭窄机器人手术舌黏膜输尿管成形术

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Virtual Area Light for Dynamic and Spatially-Varying Area Lighting

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Chinese Journal of Electronics 2015年第2期24卷 306-311页

作者： GUO Jie pan Jingui State Key Laboratory for Novel Software Technology Nanjing University

We describe a technique for interactively rendering diffuse scenes with near-field area lighting by introducing a new light type called VAL(Virtual area light). The VALs are generated via the subdivision of the primary planar luminaire, and near-field area lighting effects can be simulated directly from the geometric and radiometric information of these VALs. To ensure a high fidelity of soft shadows, we propose the multi-PCF(Percentage closer filter) algorithm which evaluates visibility through several PCF values of each VAL. Experimental results reveal that our approach can render visually convincing near-field area lighting effects as well as soft shadows without any precomputation. Our strategy also enables high-quality direct illumination results in fully dynamic scenes under both time-varying and spatially-varying area lighting conditions in the order of milliseconds.

关键词： Area lighting Virtual area light Summed-area table Percentage closer filter

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