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Design and Application of Turbine Cascade Partitioned Endwall Profiling

Journal of Thermal Science 2025年第1期34卷 110-128页

作者： ZENG fei JIANG Ruiqi xue Xingxu du Wei LUO Lei ZHOU Xun AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412002China School of Energy Science and Technology Harbin Institute of TechnologyHarbin 150001China Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research InstituteTianjin 300270China

The influence of partitioned profiling design based on a large-pitch highly loaded cascade is studied by numerical *** partitioned profile is mainly composed of a pressure-side convex structure near the leading edge and a suction-side convex structure at the midstream and downstream sides of the *** influence of the change in the vertex axial position and peak value of the B-line on the secondary flow control is *** this paper,air(ideal gas)is selected as the flow *** average static pressure at the outlet and the average total temperature at the inlet are kept *** γ-θ is used as the turbulence *** results show that the pressure-side convex structure suppresses the spanwise and pitchwise migration of the inlet flow by adjusting the static pressure distribution of the flow field,so the development of the pressure-side leg of the horseshoe vortex is effectively *** suction-side convex structure adjusts the static pressure distribution of the flow field and increases the included angle between the cross-flow and suction surface,so the accumulation of low-momentum fluid,the development of a corner vortex and the flow separation at the trailing edge of the suction-side surface are all suppressed near the endwall-suction ***,the energy loss coefficient of the large-pitch highly loaded cascade is decreased from 0.0564 to 0.0485,representing a 25% reduction in secondary flow losses.

关键词： large-pitch highly loaded cascade highly loaded design non-axisymmetrical endwall design secondary flow control partitioned endwall profiling

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Clinical observation of 36 patients with chronic nephritis proteinuria treated with Zhuangshen Gujing decoction

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TMR Clinical Research 2020年第3期3卷 103-108页

作者： Li-Chang Liu Xin Liu Qi Huang Wei-Hong Hong Min-Jian Feng Yu-Yan Jin xue-fei du Zhuhai Hospital Guangdong Traditional Chinese Medicine HospitalZhuhai 519015China

Objective:Our goal was to examine the impact of Zhuangshen Gujing decoction on proteinuria associated with chronic ***:72 patients with chronic nephritis proteinuria were divided randomly into two groups;one group was treated with Zhuangshen Gujing(n=36;treatment group)and the other group was treated with irbesartan(n=36;control group).After 6 months’treatment,urine protein and renal function were ***:Proteinuria resolved completely in four patients in the treatment group;complete disease resolution was observed only among three individuals in the control *** the 32 cases remaining in the treatment group,15 had substantial responses to Zhuangshen Gujing decoction,9 had partial responses,and 8 had no response to treatment;the overall the response rate was 73.33%.Among the 33 cases remaining in the control group,12 had a substantial response to irbesartan,5 had a partial response,and 16 had no response to treatment;the overall response rate among the controls was 57.67%(P=0.031).We also observed statistically significant differences with respect to quantitative comparisons of urinary protein at 24 days after a single course of treatment(P=0.001).Conclusion:Zhuangshen Gujing decoction is effective in treating chronic nephritis proteinuria.

关键词： Zhuangshen Gujing decoction Chronic nephritis Proteinuria Clinical observation

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A novel frameshift mutation in the BCOR gene is associated with oculo-facio-cardio-dental syndrome:a case report

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International Journal of Ophthalmology(English edition) 2025年第2期18卷 370-374页

作者： Qiu-Mei Gu xue-fei He Wen-Zhe Xiao Chao Qu Department of Ophthalmology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina West China Biobank West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Respiratory and Critical Care Medicine Center for High Altitude MedicineInstitutes for Systems GeneticsNational Clinical Research Center for GeriatricsWest China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Ophthalmology Sichuan Academy of Medical Sciences and Sichuan People’s HospitalChengdu 610072Sichuan ProvinceChina

Dear Editor,Oculo-facio-cardio-dental(OFCD)syndrome is a rare X chromosome-linked dominant genetic disease with multiple system and site *** typical traits shown in this disease are:1)eye abnormalities,notably congenital cataracts,microphthalmia,and secondary glaucoma;2)facial deformities,in particular long and narrow face,high nasal bridge,nasal tip cartilage division,and cleft palate.

关键词： nasal cataract congenital

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服务贸易创新发展试点政策是否降低了碳排放

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国际贸易问题 2025年第1期 121-137页

作者：薛飞西北大学经济管理学院

本文以服务贸易创新发展试点政策为切入点,利用2006—2021年中国285个城市的面板数据,通过构建交错双重差分模型系统考察了服务贸易创新发展试点政策对碳排放的影响及其作用机制。研究发现,服务贸易创新发展试点政策能够显著降低试点城... 详细信息

本文以服务贸易创新发展试点政策为切入点,利用2006—2021年中国285个城市的面板数据,通过构建交错双重差分模型系统考察了服务贸易创新发展试点政策对碳排放的影响及其作用机制。研究发现,服务贸易创新发展试点政策能够显著降低试点城市的碳排放,且其碳减排效应随着时间的推移逐渐增强。机制检验结果表明,服务贸易创新发展试点政策能够通过降低能源消耗、推动产业结构升级以及促进绿色技术创新三种渠道降低碳排放量。异质性分析表明,服务贸易创新发展试点政策的碳减排效应在沿海城市、服务业发展水平较高的城市以及数字基础设施较为完善的城市更为显著。本研究不仅为服务贸易政策的科学制定提供了经验证据,也为其助力实现中国“双碳”目标提供了有益的政策启示。

关键词：服务贸易创新发展碳排放 “双碳”目标交错双重差分法

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Improved rate and cycling performances of Na_(3)V_(2)(PO_(4))_(2)F_(2)O by Ti^(3+/4+)doping with two oxidation states for sodium cathodes

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中国有色金属学报 2025年第1期35卷 243-256页

作者： Xiao-fei SUN Anastase NDAHIMANA Ling-zhi WANG Zi-kang WANG Quan-sheng LI Wei TANG Min-xing YANG xue-song MEI State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China Shaanxi Key Laboratory of Intelligent Robots Xi’an Jiaotong UniversityXi’an 710049China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China

Ti at the oxidation states of Ti^(3+)and Ti^(4+),was used to enhance the performance of Na_(3)V_(2)(PO_(4))_(2)F_(2)O by partially substituting *** doping Ti,the crystallographic volume is decreased due to the less radii of Ti^(3+/4+),and the valence of Ti is demonstrated identical to *** sodium insertion in Ti-doped Na_(3)V_(2)(PO_(4))_(2)F_(2)O,the two discharge plateaus split into three because of the rearrangement of local redox ***,the optimized Na_(3)V_(0.96)Ti_(0.04)(PO_(4))_(2)F_(2)O shows a specific capacity of 123 and 63 mA·h/g at 0.1C and 20C,*** 350 cycles at 0.5C,the capacity is gradually reduced corresponding to a retention of 71.05%.The significantly improved performance is attributed to the rapid electrochemical kinetics,and showcases the strategy of replacing V^(3+/4+)with Ti^(3+/4+)for high-performance vanadium-based oxyfluorophosphates.

关键词： sodium vanadium oxyfluorophosphate titanium doping cathode sodium battery energy storage

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Failure mechanisms of AlGaN/GaN HEMTs irradiated by high-energy heavy ions with and without bias

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Nuclear Science and Techniques 2025年第1期36卷 49-58页

作者： Pei-Pei Hu Li-Jun Xu Sheng-Xia Zhang Peng-fei Zhai Ling Lv Xiao-Yu Yan Zong-Zhen Li Yan-Rong Cao xue-Feng Zheng Jian Zeng Yuan He Jie Liu Institute of Modern Physics Chinese Academy of Sciences(CAS)Lanzhou 730000China Key Laboratory of Wide Band‑gap Semiconductor Materials Ministry of EducationXidian UniversityXi’an 710071China University of Chinese Academy of Sciences(UCAS) Beijing 100049China

Gallium nitride(GaN)-based devices have significant potential for space ***,the mechanisms of radiation damage to the device,particularly from strong ionizing radiation,remains *** study investigates the effects of radiation on p-gate AlGaN/GaN high-electron-mobility transistors(HEMTs).Under a high voltage,the HEMT leakage current increased sharply and was accompanied by a rapid increase in power density that caused"thermal burnout"of the *** addition,a burnout signature appeared on the surface of the burned devices,proving that a single-event burnout effect ***,degradation,including an increase in the on-resistance and a decrease in the breakdown voltage,was observed in devices irradiated with high-energy heavy ions and without *** latent tracks induced by heavy ions penetrated the heterojunction interface and extended into the GaN ***,a new type of N_(2)bubble defect was discovered inside the tracks using Fresnel *** accumulation of N_(2)bubbles in the heterojunction and buffer layers is more likely to cause leakage and *** study indicates that electrical stress accelerates the failure rate and that improving heat dissipation is an effective reinforcement method for GaN-based devices.

关键词： GaN HEMTs Heavy ions Single-event burnout Latent tracks Degradation

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High-resolution imaging through dynamic scattering media:Iterative optimization based on polarimetric characteristics

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Science China(Technological Sciences) 2025年第1期68卷 78-80页

作者： Meng XIANG Kai DENG Tianyu WANG Jinpeng LIU xue DONG Teli XI fei LIU Xiaopeng SHAO School of Optoelectronic Engineering Xidian UniversityXi’an 710071China Xi’an Key Laboratory of Computational Imaging Xi’an 710071China National Key Laboratory of Infrared Detection Technologies Shanghai 200083China

High-resolution imaging through randomly dynamic scattered fields and highly scattered walls is an extensively sought-after capability with potential applications in various fields such as underwater imaging,biomedical imaging,and seeing through *** methods have been proposed to unscramble object information from degraded scattered images,resulting in considerable improvements in image contrast in degraded scenarios[1].

关键词： scattered dynamic resolution

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Machine learning model-based prediction of postpancreatectomy acute pancreatitis following pancreaticoduodenectomy:A retrospective cohort study

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World Journal of Gastroenterology 2025年第8期31卷 9-23页

作者： Ji-Ming Ma Peng-fei Wang Liu-Qing Yang Jun-Kai Wang Jian-Ping Song Yu-Mei Li Yan Wen Bing-Jun Tang xue-Dong Wang Hepatopancreatobiliary Center Beijing Tsinghua Changgung HospitalBeijing 102218China Department of Information Administration Beijing Tsinghua Changgung HospitalBeijing 102218China Department of Radiology Beijing Tsinghua Changgung HospitalBeijing 102218China Organ Transplantation Qilu HospitalCheeloo College of MedicineShandong UniversityJinan 250012Shandong ProvinceChina Department of Otorhinolaryngology Xiangyang No.1 People’s HospitalXiangyang 441000Hubei ProvinceChina

BACKGROUND The International Study Group of Pancreatic Surgery has established the defi-nition and grading system for postpancreatectomy acute pancreatitis(PPAP).There are no established machine learning models for predicting PPAP following pancreaticoduodenectomy(PD).AIM To explore the predictive model of PPAP,and test its predictive efficacy to guide the clinical *** Clinical data from consecutive patients who underwent PD between 2016 and 2024 were retrospectively *** analysis of PPAP risk factors was performed,various machine learning algorithms[logistic regression,random forest,gradient boosting decision tree,extreme gradient boosting,light gradient boosting machine,and category boosting(CatBoost)]were utilized to develop predictive *** feature elimination was employed to select several variables to achieve the optimal machine *** The study included 381 patients,of whom 88(23.09%)developed *** patients exhibited a significantly higher incidence of postoperative pancreatic fistula(55.68%vs 14.68%,Pduct diameter,body mass index,estimated blood loss,and surgery time were the most important variables based on recursive feature *** CatBoost algorithm based on selected variables demonstrated superior performance,with an area under the receiver operating characteristic curve of 0.837(95%CI:0.788-0.886)in the training cohort and 0.812(95%CI:0.697-0.927)in the testing *** We developed the first machine learning-based predictive model for PPAP following *** predictive model can assist surgeons in an

关键词： Pancreaticoduodenectomy Postoperative complication Acute pancreatitis Machine learning Predictive value

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VEGF和MMP-9在胰腺癌侵袭转移中的表达及临床意义

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世界华人消化杂志 2008年第9期16卷 1012-1016页

作者：李春龙崔云甫杜雪飞邰升钟翔宇哈尔滨医科大学附属第二医院肝胆胰及腹腔镜外科黑龙江省哈尔滨市150086 哈尔滨医科大学附属第四医院检验科实验中心黑龙江省哈尔滨市150000

目的:分析血管内皮生长因子(vascular endothelial growth factor,VEGF)和基质金属蛋白酶9(matrix metalloproteinases-9,MMP-9)在胰腺癌中的表达,探讨血管生成在肿瘤侵袭转移中的差别及意义.方法:选取35例胰腺癌及其癌旁组织、正常组... 详细信息

目的:分析血管内皮生长因子(vascular endothelial growth factor,VEGF)和基质金属蛋白酶9(matrix metalloproteinases-9,MMP-9)在胰腺癌中的表达,探讨血管生成在肿瘤侵袭转移中的差别及意义.方法:选取35例胰腺癌及其癌旁组织、正常组织标本,应用免疫组化方法检测VEGF、MMP-9表达和微血管密度(microvessel density,MVD)计数,并结合病理特点进行分析.结果:VEGF、MMP-9表达阳性率胰腺癌组织较癌旁组织、正常组织差异有统计学意义(VEGF:77.14% vs 5.71%,12.86%,P4 cm肿瘤VEGF的阳性率分别为42.86%、92.86%和78.57%,MMP-9的阳性率分别为28.57%、75.00%和83.33%:分化程度高、中、低肿瘤VEGF的阳性率分别为71.43%、70.59%和90.91%.MMP-9的阳性率分别为71.43%、64.71%和72.73%,差异均有统计学意义(P<0.05).VEGF、MMP-9阳性率在淋巴转移阳性组分别为100%、95.24%,胰腺癌VEGF、MMP-9阳性组与阴性组MVD平均值比较,差异均有统计学意义(t=3.23,P<0.01;t=3.89,P<0.01).结论:VEGF、MMP-9与胰腺癌的高血管生成活性相关,VEGF、MMP-9有望成为抗胰腺癌侵犯转移治疗的靶蛋白.

关键词：血管内皮生长因子基质金属蛋白酶9 胰腺癌微血管密度

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基于铁磁扭摆振子的磁场测量及其应用

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物理学报 2025年第3期74卷 90-98页

作者：武列列任益充薛飞合肥工业大学物理学院合肥230601

得益于铁磁材料极高自旋密度、强自旋-晶格相互作用及力学系统对信号的谐振放大,铁磁-力学系统在磁场精密测量领域展现出巨大潜力.本文研究了处于均匀磁场中的铁磁体所构成的铁磁扭摆振子(ferromagnetic torsional oscillator,FMTO)的... 详细信息

得益于铁磁材料极高自旋密度、强自旋-晶格相互作用及力学系统对信号的谐振放大,铁磁-力学系统在磁场精密测量领域展现出巨大潜力.本文研究了处于均匀磁场中的铁磁体所构成的铁磁扭摆振子(ferromagnetic torsional oscillator,FMTO)的力学特性,分析了其作为磁传感器的探测性能;研究表明,FMTO磁传感器在基础噪声的影响下仍拥有超高的磁灵敏度,能够超越能量分辨率极限(energy resolution limit,ERL)2—4个量级.随后针对FMTO磁传感器在新相互作用探测领域的应用进行了探讨,研究指出FMTO磁传感器测量的新相互作用耦合常数的下限领先ERL磁传感器5个量级,并超越现有实验结果2—9个量级.

关键词：磁传感器铁磁振子精密测量新相互作用

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