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Modelling and analysis of metal flowing behaviors in constraining ring rolling of tapered ring with thin wall and three high ribs 被引量:1
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作者 Lin HUA Duanyang TIAN +1 位作者 Xinghui HAN Wuhao ZHUANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第6期476-492,共17页
Tapered ring with thin wall and three high ribs(TRTWTHR),showing complicated geometry(wall thickness is less than 4 mm and rib height exceeds 20 mm),is extensively utilized to fabricate the critical structural parts o... Tapered ring with thin wall and three high ribs(TRTWTHR),showing complicated geometry(wall thickness is less than 4 mm and rib height exceeds 20 mm),is extensively utilized to fabricate the critical structural parts of aerospace equipment such as spacecraft cabin,rocket body and fuel tank because of light weight and high carrying capacity.How to fabricate TRTWTHR with high performance is a critical problem that aerospace area needs to solve.In this work,constraining ring rolling(CRR)technique is first adopted to form TRTWTHR.However.unreasonable metal streamlines(UMS)and uncoordinated growth of three ribs easily occur in CRR of TRTWTHR,which makes the forming quality of TRTWTHR difficult to be controlled.Faced with this difficulty,an analytical model that can predict UMS and the height of three ribs in CRR of TRTWTHR is established so as to guide the process design of CRR.Subsequently,the reliability of the established analytical model and the feasibility of CRR of TRTWTHR are confirmed by FE simulation and experiment.Then,using the established analytical model,the window of UMS occurring relevant to the tapered angle of TRTWTHR and the location of the rib of middle end is developed.Finally,three uncoordinated growth modes among three ribs are found when the width of three ribs is identical and UMS do not occur,and the mechanisms of three uncoordinated growth modes are revealed. 展开更多
关键词 Analytical model Constraining ring rolling Growth of three ribs Metal streamlines Tapered ring with thin wall and three high ribs
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Three-dimensional simulation method of multipactor in microwave components for high-power space application 被引量:5
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作者 李韵 崔万照 +4 位作者 张 娜 王新波 王洪广 李永东 张剑锋 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第4期686-693,共8页
Based on the particle-in-cell technology and the secondary electron emission theory, a three-dimensional simulation method for multipactor is presented in this paper. By combining the finite difference time domain met... Based on the particle-in-cell technology and the secondary electron emission theory, a three-dimensional simulation method for multipactor is presented in this paper. By combining the finite difference time domain method and the panicle tracing method, such an algorithm is self-consistent and accurate since the interaction between electromagnetic fields and particles is properly modeled. In the time domain aspect, the generation of multipactor can be easily visualized, which makes it possible to gain a deeper insight into the physical mechanism of this effect. In addition to the classic secondary electron emission model, the measured practical secondary electron yield is used, which increases the accuracy of the algorithm. In order to validate the method, the impedance transformer and ridge waveguide filter are studied. By analyzing the evolution of the secondaries obtained by our method, multipactor thresholds of these components are estimated, which show good agreement with the experimental results. Furthermore, the most sensitive positions where multipactor occurs are determined from the phase focusing phenomenon, which is very meaningful for multipactor analysis and design. 展开更多
关键词 MULTIPACTOR numerical method three-DIMENSIONAL high-POWER THRESHOLD
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High-capacity three-party quantum secret sharing with superdense coding 被引量:2
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作者 顾斌 李传起 +1 位作者 徐飞 陈玉林 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第11期4690-4694,共5页
This paper presents a scheme for high-capacity three-party quantum secret sharing with quantum superdense coding, following some ideas in the work by Liuet al (2002 Phys. Rev. A 65 022304) and the quantum secret sha... This paper presents a scheme for high-capacity three-party quantum secret sharing with quantum superdense coding, following some ideas in the work by Liuet al (2002 Phys. Rev. A 65 022304) and the quantum secret sharing scheme by Deng et al (2008 Phys. Lett. A 372 1957). Instead of using two sets of nonorthogonal states, the boss Alice needs only to prepare a sequence of Einstei^Podolsky-l^osen pairs in d-dimension. The two agents Bob and Charlie encode their information with dense coding unitary operations, and security is checked by inserting decoy photons. The scheme has a high capacity and intrinsic efficiency as each pair can carry 21bd bits of information, and almost all the pairs can be used for carrying useful information. 展开更多
关键词 quantum secret sharing three-party high-CAPACITY superdense coding
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Oxidation behavior of three-phase Cu-25Ni-30Cr alloy at 700-800℃ under high oxygen pressures 被引量:1
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作者 曹中秋 刘伟华 +5 位作者 翟广平 牛焱State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China 《中国有色金属学会会刊:英文版》 CSCD 2005年第3期491-496,共6页
The thermogravimetric analysis of a ternary Cu-25Ni-30Cr alloy prepared by conventional casting was performed in 0.1MPa pure O2 at 700-800℃. The results show that the alloy is composed of three phases, where the ... The thermogravimetric analysis of a ternary Cu-25Ni-30Cr alloy prepared by conventional casting was performed in 0.1MPa pure O2 at 700-800℃. The results show that the alloy is composed of three phases, where the phase with the largest copper and lowest chromium content forms the matrix, while the other two, much richer in chromium, form a dispersion of isolated particles. At variance with another three-phase Cu-20Ni-20Cr alloy, which forms complex scales containing the oxides of the various components and double oxides plus an irregular region composed of alloy and oxides, the present alloy can form a very irregular but continuous chromia layer at the base of the mixed internal region, producing a gradual decrease of the oxidation rate down to very low values. A larger chromium content needed to form chromia layer for a ternary three-phase alloy is attributed to the limitations to the diffusion of the alloy components in the metal substrate imposed by their multiphase nature. 展开更多
关键词 铜-镍-铬合金 三相 高温氧化 热解重量
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Progress and Development Direction of “Three-High” Oil and Gas Well Testing Technology 被引量:1
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作者 Bo Zhang Fayon Yuan +3 位作者 Hao Su Ming Cao Ruifeng Guo Chenxiang Sun 《Journal of Power and Energy Engineering》 2022年第6期1-13,共13页
By reviewing the development of “three-high” oil and gas well testing technology of Sinopec in recent years, this paper systematically summarizes the application of “three-high” oil and gas well testing technology... By reviewing the development of “three-high” oil and gas well testing technology of Sinopec in recent years, this paper systematically summarizes the application of “three-high” oil and gas well testing technology of Sinopec in engineering optimization design technology, and high temperature and high pressure testing technology, high pressure and high temperature transformation completion integration technology. Major progress has been made in seven aspects: plug removal and re-production technology of production wells in high acid gas fields;wellbore preparation technology of ultra-deep, high-pressure, and high-temperature oil and gas wells;surface metering technology;and supporting tool development technology. This paper comprehensively analyzes the challenges faced by the “three-high” oil and gas well production testing technology in four aspects: downhole tools, production testing technology, safe production testing, and the development of low-cost production test tools. Four development directions are put forward: 1) Improve ultra-deep oil and gas testing technology and strengthen integrated geological engineering research. 2) Deepen oil and gas well integrity evaluation technology to ensure the life cycle of oil and gas wells. 3) Carry out high-end, customized, and intelligent research on oil test tools to promote the low-cost and efficient development of ultra deep reservoirs. 4) Promote the fully automatic control of the surface metering process to realize the safe development of “three-high” reservoirs. 展开更多
关键词 three-high Oil and Gas Wells Oil Test Geological Engineering Integra-tion Intelligent Downhole Tools
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Microfluidic three-dimensional cell culture of stem cells for high-throughput analysis 被引量:4
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作者 Jeong Ah Kim Soohyun Hong Won Jong Rhee 《World Journal of Stem Cells》 SCIE 2019年第10期803-816,共14页
Although the recent advances in stem cell engineering have gained a great deal of attention due to their high potential in clinical research,the applicability of stem cells for preclinical screening in the drug discov... Although the recent advances in stem cell engineering have gained a great deal of attention due to their high potential in clinical research,the applicability of stem cells for preclinical screening in the drug discovery process is still challenging due to difficulties in controlling the stem cell microenvironment and the limited availability of high-throughput systems.Recently,researchers have been actively developing and evaluating three-dimensional(3D)cell culture-based platforms using microfluidic technologies,such as organ-on-a-chip and organoid-on-a-chip platforms,and they have achieved promising breakthroughs in stem cell engineering.In this review,we start with a comprehensive discussion on the importance of microfluidic 3D cell culture techniques in stem cell research and their technical strategies in the field of drug discovery.In a subsequent section,we discuss microfluidic 3D cell culture techniques for high-throughput analysis for use in stem cell research.In addition,some potential and practical applications of organ-on-a-chip or organoid-on-a-chip platforms using stem cells as drug screening and disease models are highlighted. 展开更多
关键词 STEM CELL Microfluidic TECHNOLOGY three-DIMENSIONAL CELL CULTURE highthroughput SCREENING
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Electromagnetically induced transparency of single Λ-type three-level atoms in a high-finesse optical cavity
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作者 孙燕芬 谭磊 徐岩 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期158-162,共5页
We study the features of electromagnetically induced transparency(EIT) in a single Λ-type three-level atom placed in a high-finesse cavity under the action of a coupling laser and a probe laser.Our calculations sho... We study the features of electromagnetically induced transparency(EIT) in a single Λ-type three-level atom placed in a high-finesse cavity under the action of a coupling laser and a probe laser.Our calculations show that three transparency windows appear when the pump strength is large enough.This can be explained by the residual pump in the cavity mostly resulting in energy splitting.The level |3 is split into four slightly different energy levels,and interference takes place between the excitation pathways.Furthermore,it is also shown that the frequencies of the EIT windows can be tuned by changing the coupling field detuning 2,and that the reflection profile is very sensitive to the cavity field detuning △c. 展开更多
关键词 Λ-type three-level atom high-finesse optical cavity electromagnetically induced transparency
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Mechanical effects of light on the ■-type three-level atom in a high-finesse optical cavity
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作者 刘利伟 谭磊 黄刚 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第1期377-384,共8页
A theoretical study is carried out for the modification and implication of the effect on the type three level atom in a high-finesse optical cavity driven by light field including spontaneous emission and the cavity d... A theoretical study is carried out for the modification and implication of the effect on the type three level atom in a high-finesse optical cavity driven by light field including spontaneous emission and the cavity decay. Analytic expressions for the dipole force, the friction force, the optical potentials and the friction coefficient are obtained. Then the numerical and graphical methods are used to investigate the friction coefficient with the controlling parameters. It is shown that the friction coefficient is strongly dependent on the controlling parameters. The cooling rate can increase by one order of magnitude more than that of a two-level atomic system. The reason can be given using the dressed states and the Sisyphus cooling mechanism, which would stimulate further experimental investigations. 展开更多
关键词 three-level atom mechanical effects high finesse optical cavity
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Sequential transcatheter arterial chemoembolization,three-dimensional conformal radiotherapy,and high-intensity focused ultrasound treatment for unresectable hepatocellular carcinoma patients 被引量:9
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作者 Shengfa Ni Lingxiang Liu Yongqian Shu 《The Journal of Biomedical Research》 CAS 2012年第4期260-267,共8页
The purpose of this study was to evaluate the outcome of patients with unresectable hepatocellular carcinoma(HCC) treated by sequential therapy of transcatheter arterial chemoembolization(TACE),three-dimensional c... The purpose of this study was to evaluate the outcome of patients with unresectable hepatocellular carcinoma(HCC) treated by sequential therapy of transcatheter arterial chemoembolization(TACE),three-dimensional conformal radiotherapy(3-DCRT) and high-intensity focused ultrasound(HIFU).From October,2005 to September,2010,120 patients with unresectable HCC received the sequential treatments of several courses of TACE followed in 2-4 weeks by 3-DCRT and then a single session of HIFU with a curative intent.The median tumor irradiation dose was 40 Gy.Tumor response,toxicity and overall survival rate were analyzed.Clinicopathologic factors affecting the primary technique effectiveness and overall survival rates were investigated by univariate analysis or multivariate analysis.All 120 HCC patients were followed up by the last follow-up time.Among these patients,hepatic toxicities due to treatment were notable in 9 cases.Gastrointestinal bleeding after the overall treatment occurred in 2 cases,leukopenia of grade III was detected in 1 case,radiation-induced liver disease(RILD) was observed in 2 patients,and first-and second-degree skin burn around the HIFU treatment zone were observed in 2 patients and 1 patient,respectively.Among 120 patients,23,83 and 14 cases achieved partial response,stable disease and progressive disease,respectively.The overall survival rates at 1 year,3 years and 5 years were 70%,35% and 15%,respectively,with a median survival time of 26 months.Both Child-Pugh liver function grading and radiation dose were determined to be independent predictors for overall survival revealed by the multivariate analysis.It is concluded that the sequential therapy of TACE,3-DCRT and HIFU is a promising therapeutic regimen for unresectable HCC. 展开更多
关键词 transcatheter arterial chemoembolization(TACE) three-dimensional con-formal radiotherapy(3DCRT) high-intensity focused ultrasound(HIFU) hepatocellular carcinoma
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Three-Dimensional Analysis of Melanosomes Isolated from B16 Melanoma Cells by Using Ultra High Voltage Electron Microscopy 被引量:1
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作者 Shuuichi Akazaki Toshie Takahashi +7 位作者 Yujiro Nakano Tomoki Nishida Hirotarou Mori Akio Takaoka Hitomi Aoki Huayua Chen Takahiro Kunisada Kenzo Koike 《Microscopy Research》 2014年第1期1-8,共8页
Melanosomes, isolated by centrifugal separation from culture broth of B16 melanoma cells derived from mouse, were observed by scanning electron microscopy (SEM), and by transmission electron microscopy (TEM). Some int... Melanosomes, isolated by centrifugal separation from culture broth of B16 melanoma cells derived from mouse, were observed by scanning electron microscopy (SEM), and by transmission electron microscopy (TEM). Some interesting structural features were found inside and outside of the melanosomes. By SEM observation, the melanosomes were ellipsoid shape, their surface was not smooth and was covered with rough substructure, 10 to 20 nm particles. By TEM, uneven structure and micro particles were observed in the melanosomes. Furthermore, three-dimensional analysis was tried by using the ultra-high voltage electron microscopy(UHVEM). Micrographs of the melanosomes were taken at various tilted angles by UHVEM, after preparing 500 nm thickness specimens stained with lead citrate. From the micrographs collected, the three-dimensional structures were reconstructed by using i-mode software. Melanin stained by lead and non stained parts was clearly observed in the reconstructed structure. Non stained parts were round, regular size, and distributed widely in the melanosomes. 展开更多
关键词 B16 MELANOMA MELANOSOME Scanning ELECTRON MICROSCOPY Transmission ELECTRON MICROSCOPY Ultra high Voltage ELECTRON MICROSCOPY three-Dimensional Structure
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Magnetic levitation performance of high-temperature superconductor over three magnetic hills of permanent magnet guideway with iron shims of different thicknesses
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作者 Yuming Gong Gang Liang +3 位作者 Lifeng Zhao Yong Zhang Yong Zhao Xuyong Chen 《Journal of Modern Transportation》 2014年第3期187-193,共7页
Superconducting magnetic levitation performance, including levitation force and guidance force, is important for the application of high-temperature super- conducting maglev. Both of them are not only affected by diff... Superconducting magnetic levitation performance, including levitation force and guidance force, is important for the application of high-temperature super- conducting maglev. Both of them are not only affected by different arrays of superconductors and magnets, but also by the thickness of the iron shim between permanent magnets. In order to obtain the best levitation performance, the magnetic field distribution, levitation force, and guidance force of a new type of three magnetic hills of permanent magnet guideway with iron shim of different thicknesses (4, 6, and 8 mm) are discussed in this paper. Simulation analysis and experiment results show that the guideway with iron shim of 8 mm thickness possesses the strongest magnetic field and levitation performance when the suspension gap is larger than 10 mm. However, with the decreasing of suspension gap, the guideway with iron shim of 4 mm thickness possesses the best levitation performance. The phenomena can be attributed to the density distribution of flux and magnetization of iron shim. 展开更多
关键词 high-temperature superconductor three magnetic hills of permanent magnet guideway Thickness of iron shim Levitation force Guidance force
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A NEW HIGH-ORDER ACCURACY EXPLICIT DIFFERENCE SCHEME FOR SOLVING THREE-DIMENSIONAL PARABOLIC EQUATIONS
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作者 马明书 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1998年第5期497-501,共5页
In this paper, a new three-level explicit difference scheme with high-order accuracy is proposed for solving three-dimensional parabolic equations. The stability condition is r = Delta t/Delta x(2) = Delta t/Delta gam... In this paper, a new three-level explicit difference scheme with high-order accuracy is proposed for solving three-dimensional parabolic equations. The stability condition is r = Delta t/Delta x(2) = Delta t/Delta gamma(2) = Delta t/Delta z(2) less than or equal to 1/4, and the truncation error is O(Delta t(2) + Delta x(4)). 展开更多
关键词 high-order accuracy explicit difference scheme three-dimensional parabolic equation
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复杂系统视角下粮食产业“三链协同”建构及优化策略
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作者 崔宁波 《中州学刊》 北大核心 2025年第1期40-48,共9页
“三链协同”是推动粮食产业转向高质量发展的重要抓手。面对粮食产业“三链协同”式发展,传统的系统理论分析框架难以深入论证其中机制,复杂系统理论提供了一个更加全面精准的分析视角。基于复杂系统视角,实现粮食产业“三链协同”必... “三链协同”是推动粮食产业转向高质量发展的重要抓手。面对粮食产业“三链协同”式发展,传统的系统理论分析框架难以深入论证其中机制,复杂系统理论提供了一个更加全面精准的分析视角。基于复杂系统视角,实现粮食产业“三链协同”必须从过程和结果两个维度准确把握其内涵与外延,进而构建“节点—连边—整体”三维分析框架。对应到实践层面,当前“三链协同”仍存在资源错配现象突出、产业链条韧性不足、系统协作效率较低、内生动力有待激发等关键问题。为确保“三链协同”有序推进,应着重从资源整合逻辑、链条协同逻辑、系统演化逻辑入手,厘清“三链协同”系统的构建思路,在资源整合、激励约束、科技创新、协同治理等方面进行整体优化,以期推动粮食产业“三链协同”式高质量发展,加快实现我国由粮食大国向粮食强国的迈进。 展开更多
关键词 粮食产业“三链协同” 复杂系统 高质量发展 策略优化
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数字赋能高职院校“三教”改革实施路径研究
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作者 刘向凤 《计算机应用文摘》 2025年第1期40-42,47,共4页
在建设数字中国的背景下,高职院校正加速推进数字化转型,通过数字技术赋能,推动课程开展“三教”改革。依托人工智能、大数据、元宇宙和虚拟仿真等技术,着力构建产教融合的教学创新团队,推动教师队伍改革;紧密对接产业需求,及时更新教... 在建设数字中国的背景下,高职院校正加速推进数字化转型,通过数字技术赋能,推动课程开展“三教”改革。依托人工智能、大数据、元宇宙和虚拟仿真等技术,着力构建产教融合的教学创新团队,推动教师队伍改革;紧密对接产业需求,及时更新教学内容,开发以数字化教材为代表的新型教材,推进教材改革;借助大数据和人工智能技术,虚实结合,实现个性化和差异化教学,推动教学方法改革。通过数字技术赋能“三教”改革,高职教育正迈向高质量发展,进一步促进了教育与产业升级深度融合,实现了教育链、人才链与产业链的有机衔接。 展开更多
关键词 数字赋能 高职院校 “三教”改革 高质量发展
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三维高熵合金的合成及其电解水应用研究进展
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作者 王帅 任李萍 +5 位作者 陈春迎 王龙飞 王奇 陈新 范金鹏 陈杰 《现代化工》 CAS 北大核心 2025年第1期17-23,共7页
概述了三维高熵合金材料的合成方法及其在电催化分解水领域的应用研究进展。重点介绍了脱合金法和湿化学法合成三维高熵合金,以及多孔结构、凸立方型结构、介孔球的三维高熵合金在电催化分解水方面所取得的突破性进展。最后指出,三维高... 概述了三维高熵合金材料的合成方法及其在电催化分解水领域的应用研究进展。重点介绍了脱合金法和湿化学法合成三维高熵合金,以及多孔结构、凸立方型结构、介孔球的三维高熵合金在电催化分解水方面所取得的突破性进展。最后指出,三维高熵合金的可控合成方法及其电催化水分解机制方面仍缺少系统性的梳理,在实际应用方面亟待寻找简易、高效的宏量制备方法。 展开更多
关键词 高熵合金 三维形貌 析氢反应 析氧反应 协同效应
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中国新能源产业高质量发展:进展、挑战及对策 被引量:7
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作者 王恰 《当代经济管理》 CSSCI 北大核心 2024年第8期64-72,共9页
大力发展新能源是改善我国能源结构,保障国家能源安全,实现碳达峰碳中和美好愿景的必然选择。一方面,新能源的大规模开发利用,可以有效减少对传统化石能源和进口能源的依赖,降低环境污染和温室气体排放,为经济社会发展提供绿色低碳且可... 大力发展新能源是改善我国能源结构,保障国家能源安全,实现碳达峰碳中和美好愿景的必然选择。一方面,新能源的大规模开发利用,可以有效减少对传统化石能源和进口能源的依赖,降低环境污染和温室气体排放,为经济社会发展提供绿色低碳且可持续的能源支撑。另一方面,新能源产业属于我国新质生产力,代表着科技革命和产业变革的新方向、新趋势。新能源技术的发展和产业链的构建,可以有力地带动装备制造、科技研发、配套服务等相关产业的发展,促进技术创新和产业升级,培育新的经济增长点,对于我国加快产业结构优化升级、增强经济综合竞争力具有重要意义。 展开更多
关键词 新能源 发电装机 “新三样” 高质量发展
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三新并举推动高质量发展的全要素效率测度及时空演化特征
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作者 安博文 许培源 +1 位作者 马建安 王燕利 《工业技术经济》 北大核心 2025年第1期25-34,共10页
新质生产力、新型工业化和新型城镇化的三新并举作为中国式现代化进程中的又一伟大创举,是实现高质量发展的必由之路。本文将三新并举视作投入要素、高质量发展作为产出成果,采用SBM模型测度三新并举全要素效率,并运用类方差分解、Mora... 新质生产力、新型工业化和新型城镇化的三新并举作为中国式现代化进程中的又一伟大创举,是实现高质量发展的必由之路。本文将三新并举视作投入要素、高质量发展作为产出成果,采用SBM模型测度三新并举全要素效率,并运用类方差分解、Moran指数和收敛模型等方法考察其时空演化特征。研究发现:2006~2022年三新并举对高质量发展的推动效果愈发明显,其中,新质生产力是推动高质量发展的中坚力量;三新并举全要素效率的空间差异呈现发散趋势,四大板块的区域间差异是总体差异的主要来源,空间集聚效应促使新质生产力和新型工业化的全要素效率呈现收敛态势;三新子要素全要素效率的集聚重心偏向东部地区,新质生产力和新型城镇化的全要素效率分别表现为南强北弱和北强南弱,新型工业化全要素效率历经南强北弱到北强南弱的转变。 展开更多
关键词 三新并举 新质生产力 新型工业化 新型城镇化 高质量发展 全要素效率 中国式现代化 SBM模型
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“三高三难”背景下职业院校虚拟仿真实训改革初探 被引量:1
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作者 应畅 马小龙 《湖北开放职业学院学报》 2024年第7期169-170,173,共3页
高职教育的高质量发展,需要进行实训教学改革来解决当前实训存在的“高投入高难度高风险、难实施难观摩难再现”问题。虚拟仿真实训改革应结合教学实际、企业生产、区域发展,以现有实训基地建设为基础,以多种信息技术为手段,聚焦行业需... 高职教育的高质量发展,需要进行实训教学改革来解决当前实训存在的“高投入高难度高风险、难实施难观摩难再现”问题。虚拟仿真实训改革应结合教学实际、企业生产、区域发展,以现有实训基地建设为基础,以多种信息技术为手段,聚焦行业需求,搭建企业和学生双向需求通道,科学构建实训课程评价体系,整合校企课程资源,构建共建共享共用机制,实现大范围资源共享,最终实现高技能人才培养的信息化、智能化和现代化的目标。 展开更多
关键词 三高三难 虚拟仿真 实训资源 教学改革 实训改革
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Clinical Value of Transperineal 3D Volume Ultrasound Combined with 2D High Frequency Ultrasound in Anal Fistula 被引量:3
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作者 Dan Yang Xiufen Yao 《Journal of Biosciences and Medicines》 2020年第5期12-19,共8页
Objective: To explore the clinical diagnostic value of transperineal volume ultrasound combined with two-dimensional high-frequency ultrasound for anal fistula. Methods: A total of 52 patients with anal fistula admitt... Objective: To explore the clinical diagnostic value of transperineal volume ultrasound combined with two-dimensional high-frequency ultrasound for anal fistula. Methods: A total of 52 patients with anal fistula admitted to the Affiliated Hospital of Shaanxi University of Traditional Chinese Medicine from December 2017 to July 2018 were selected. They were all undergoing transperineal 3D volume ultrasound combined with 2D high-frequency ultrasound examination, and the diagnosis results were analyzed. The results of ultrasonography and surgical pathology were compared. Results: Among 52 patients, 3D volume ultrasound combined with 2D high-frequency ultrasound were used to diagnose 32 cases of anal fistula intersphincteric type, 14 cases of transsphincter type, 5 cases of supra-sphincter type, and 1 case of extra-sphincter type. T supervisor classification accuracy rate is 90%. The detection rate of branch pipes was 92%, and the compliance rate of internal fistula was 95%. Two-dimensional high-frequency ultrasound was used to diagnose 34 cases of anal fistula intersphincteric type, 14 cases of transsphincter type, 4 cases of supra-sphincter type, and 0 cases of extra-sphincter type. The detection rate of branch canals was 42%, and the accuracy of type classification was 90%. The coincidence rate was 95%. There was a statistically significant difference in the detection rate of the anal fistula branch and the coincidence rate of the internal fistula between the two methods (both P Conclusion: 1) The overall coincidence rate of three-dimensional volumetric ultrasound combined with two-dimensional high-frequency ultrasound in the diagnosis of anal fistula is high;2) Three-dimensional volumetric ultrasound technology has great application prospects in infants and anal fistulas. 展开更多
关键词 TWO-DIMENSIONAL high-FREQUENCY ULTRASOUND Anal Fistula three-Dimensional VOLUME ULTRASOUND COMBINED with TWO-DIMENSIONAL high-FREQUENCY ULTRASOUND
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“三高四新”背景下高职物流人才培养模式创新研究 被引量:1
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作者 冯梅 《物流科技》 2024年第13期167-169,共3页
“三高四新”战略背景下,企业对物流人才的需求逐渐转向多能力、跨学科、复合型。文章提出了“三高四新”战略背景下的高职物流“知行创”三融入人才培养模式,指出了从培养目标、课程体系、评价体系等方面进行高职物流人才培养模式的改... “三高四新”战略背景下,企业对物流人才的需求逐渐转向多能力、跨学科、复合型。文章提出了“三高四新”战略背景下的高职物流“知行创”三融入人才培养模式,指出了从培养目标、课程体系、评价体系等方面进行高职物流人才培养模式的改革,旨在培养出懂设备使用、懂流程规划、懂投资回报和懂现场管理的物流人才,为高职物流专业的人才培养方案制定提出了有益建议。 展开更多
关键词 “三高四新” 高等职业教育 物流人才培养 人才培养模式
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