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World Journal of Clinical Cases 2020年第9期8卷 1674-1678页

作者： Feng Qin Nan-Ze Yu Elan Yang Ang Zeng Yan Hao Lin Zhu Xiao-Jun Wang Department of Plastic Surgery Peking Union Medical College HospitalPeking Union Medical CollegeBeijing 100730China

BACKGROUND High-riding nipple is one of the common complications after mastopexty and breast ***,to date,a limited number of techniques have concentrated on how to lower the high-riding nipple with enlarged *** SUMMARY This is a case report describing a combination of surgical techniques to decrease high-riding nipple.A 26-year-old woman,who previously underwent several breast operations,sought correction for high-riding nipple with enlarged *** were used and multi-stage techniques were *** one year of follow-up,lowered nipple,reduced areola size,ensured nipple blood supply,and improved breast ptosis were achieved,and the patient was satisfied with the breast *** The proposed technique offers a feasible treatment option for postoperative nipple over-elevation combined with areola dilation.

关键词： High-riding nipple Enlarged areola expander Mastopexty Breast ptosis Case report

Novel Unilateral Dental expander Appliance(UDEX):A Compound Innovative Materials

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Computers, Materials & Continua 2021年第9期68卷 3499-3511页

作者： Hasan Sabah Hasan Abdallah AAbdallah Imran Khan Hala Sadek Alosman Ayshan Kolemen Bilal Alhayani Department of Orthodontic Khanzad Teaching CenterGeneral Directorate of Hawler-Ministry of HealthErbilIraq Department of Industrial Engineering German Jordanian UniversityAmmanJordan Department of Electrical Engineering University of Engineering and TechnologyPeshawarPakistan Department of Orthodontics Near East UniversityNicosiaNorth CYPRUSTurkey Orthodontic Department Al-Mustaqbal University CollegeBabelIraq Department of Electronics and communication Yildiz Technical UniversityTurkey

True unilateral posterior crossbite in adults is a challenging malocclusion to treat,especially when we need to correct cross-arch segments with unwanted effects on non-cross *** expansion methods are expected to have some shortcomings;the Unilateral dental expander appliance used to restore unilateral cross bite dental arch is an uncommon appliance;for this,a designed new device is *** paper aimed to invite a new unilateral dental expander appliance(UDEX)to treat unilateral dental posterior crossbite in adults using available dental material,easy to use and handle,well tolerated by the patient,and biocompatible with oral *** could find that in all dental markets and dental clinics—an eighteen-year-old female with bilateral crossbite and upper and lower dental arch *** active orthodontic treatment,a quad-helix expander had broken from one side at soldering between band and wire *** patient did not show up to the clinic for a while due to COVID 19 pandemic lockdown,leading to a true unilateral crossbite at the dental arch’s upper left side,especially at the molar premolars *** unilateral cross bite was treated using a new specially designed expanded appliance as a unilateral posterior cross bite dental maxillary *** a result of this study,orthodontic treatment was finished within(15)months,much less than *** obtained Class I molar and canine relationships with uncrossed dental arches in both upper arch sides,proper overbite and overjet with well-leveled and aligned teeth as it confirmed by clinical examination and radiographic images(OPG Orthopantomogram)and cephalometric radiograph(WebCeph analysis digitalized computer program).Conclude from that,the newly designed unilateral dental expander(UDEX)is proven to be useful for treating real unilateral posterior crossbites as single molar or premolar tooth and multiple joint unilateral crossed posterior ***,it could easily modify it fo

关键词： Unilateral crossbite dental material acrylic pads wire bending expander

Theoretical analysis on expansion mechanism in carbon dioxide expander

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Science China(Technological Sciences) 2011年第6期54卷 1469-1474页

作者： TIAN Hua MA YiTai LI MinXia ZHANG MeiLan Thermal Energy Research Institute Tianjin UniversiO Tianjin 300072 China

The expansion mechanism inside carbon dioxide expander is analyzed theoretically in this *** mechanism analysis of metastable equilibrium indicates that there is a potential barrier during phase change *** is to say energy is required to overcome the potential barrier when the new interface is formed from primary *** superheat of liquid is the impetus of phase change and has an exponential decrease with the increase of the saturated temperature of *** analysis also indicates that there is a critical radius during the phase change *** bubble will grow up when its radius is larger than the critical value,otherwise,will *** considering the metastable phase change,calculation of P and V during expansion process indicates that the phase-change will be delayed with the decline of pressure,which is called lag *** phase-change delay time decreases with the increase of initial *** the initial temperature is close to the critical temperature,the delay time is close to *** phase-change delay brings energy losses,which decrease with the increase of initial temperature and its decrease ratio also has a decrease *** the initial pressure is 10 MPa,the energy loss will be 1.06 W with an initial temperature of 10℃ while 0.34 W with that of 20℃.

关键词： expansion mechanism carbon dioxide expander potential barrier superheat degree phase-change delay

Configuration Consideration for expander in Transcritical Carbon Dioxide Two-Stage Compression Cycle

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Transactions of Tianjin University 2005年第1期11卷 53-58页

作者：马一太杨俊兰管海清李敏霞 Thermal Energy Research Institute Tianjin University Tianjin 300072 China

To investigate the configuration consideration of expander in transcritical carbon dioxide two-stage compression cycle, the best place in the cycle should be searched for to reinvest the recovery work so as to improve the system efficiency. The expander and the compressor are connected to the same shaft and integrated into one unit, with the latter being driven by the former, thus the transfer loss and leakage loss can be decreased greatly. In these systems, the expander can be either connected with the first stage compressor (shortened as DCDL cycle) or the second stage compressor (shortened as DCDH cycle), but the two configuration ways can get different performances. By setting up theoretical model for two kinds of expander configuration ways in the transcritical carbon dioxide two-stage compression cycle, the first and the second laws of thermodynamics are used to analyze the coefficient of performance, exergy efficiency, inter-stage pressure, discharge temperature and exergy losses of each component for the two cycles. From the model results, the performance of DCDH cycle is better than that of DCDL cycle. The analysis results are indispensable to providing a theoretical basis for practical design and operating.

关键词： carbon dioxide transcritical cycle two-stage compression expander thermodynamic (analysis)

Performance study on three-stage power system of compressed air vehicle based on single-screw expander

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Science China(Technological Sciences) 2010年第8期53卷 2299-2303页

作者： HE Wei,WU YuTing ,MA ChongFang&MA GuoYuan Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Ministry of Education,and Key Laboratory of Heat Transfer and Energy Conversion,Beijing Municipality,College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China Key Laboratory of Enhanced Heat Transfer and Energy Conservation Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion Beijing Municipality College of Environmental and Energy Engineering Beijing University of Technology Beijing China

A new compressed-air engine system based on three-stage single screw expander was proposed to improve the performance of power *** different structure styles were presented,and the studies on the power performance and the distribution of expansion ratios between stages were carried out by programming and mathematical modeling of each *** results indicated that the best matches of expansion ratios with equal heat temperature for the air tank of pressure 30 MPa were seven-five-three for"first-stage heating"style,eight-five-three for"two-stage heating"style and five-five-four for"three-stage heating"style,*** also showed that heating up inlet air or increasing the expander efficiency might improve the power *** output power of the"two-stage heating"style is far higher than that of"first-stage heating"style and is a little lower than that of"three-stage heating"*** new system showed good structure and power performances.

关键词： compressed-air engine single screw expander three-stage power system

Thermodynamic Comparison Analysis on CO_2 Transcritical Reverse Cycles with IHX or expander

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Transactions of Tianjin University 2005年第2期11卷 110-114页

作者：管海清马一太杨俊兰李敏霞 School of Mechanical Engineering Tianjin University Tianjin 300072 China

To improve the coefficient of performance （COP） of CO2 transcritical reverse cycle and determine the most efficient cycle, comparison analysis on （single-and） two-stage CO2 transcritical cycles with internal heat exchanger （IHX） or expander is presented adopting the principle of thermodynamics. Results indicate that the COP of four cycles,namely single-stage compression with IHX （SI）, single-stage compression with expander （SE）, two-stage compression with IHX （TI） and two-stage compression with expander （TE）, can be ranged as TE>SE>TI>SI. It presents that adopting an expander to recover expansion power is the primary method to improve the COP of CO2 transcritical reverse cycle if the efficiency of the expander is up to a certain value. Under supposed operating condition, where the outlet temperature of gas cooler is 35 ℃ and the evaporating temperature is 5 ℃, the COP of TE cycle is about 4200 higher than that of SI cycle when the expander efficiency is 0.6 and the degree of superheat of IHX is 15 ℃. Therefore TE cycle is the most recommendatory one and it is better to adopt TE in those high-cooling capacity systems because its technology cost will be higher.

关键词： CO_2 transcritical reverse cycle internal heat exchanger expander coefficient of performance

Reconfigurable Digital Circuits Based on Chip expander with Integrated Temperature Regulation

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Journal of Computer and Communications 2015年第11期3卷 169-175页

作者： Vaclav Simek Richard Ruzicka Adam Crha Michal Reznicek Faculty of Information Technology Brno University of Technology Brno Czech Republic SEANT Technology s.r.o. Brno Czech Republic

This article is dealing with a development of custom chip expander platform with the possibility of accurate temperature control and integration of additional silicon-based features. Such platform may serve as a useful tool which facilitates the burdens connected with measurement and analysis tasks of experimental semiconductor structures. The devised solution provides the functionality of carrier substrate (Al2O3 compound) with CTE compatibility to the experimental silicon chip and is fully customizable with respect to a particular chip. It also allows achieving an easy fan-out of small-diameter chip terminals into a larger, more convenient area and placement of chip specimens conveniently into space-constrained chamber of the AFM microscopes, probe stations, etc. Real application of the developed chip expander platform is demonstrated in context of digital reconfigurable circuits based on polymorphic electronics. In this case the chip expander with attached polymorphic chip REPOMO is thermally stabilized at an ambient temperature level up to approximately 135。C and its sensitivity to this phenomenon is demonstrated.

关键词： Reconfiguration Digital Circuits Polymorphic Electronics Chip expander Thick Film Wirebonding

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爱立信expander方案应对多变市场

现代电信科技 2004年第6期34卷 50-51页

作者：爱立信(中国)有限公司爱立信(中国)有限公司

爱立信cdma2000expander解决方案有助于在更复杂、更经济高效的环境中,更多地满足移动网络运营商的需求,从而掌控快速变化的市场客户群体,赢得更多用户.

关键词：爱立信自行车 cdma2000 expander 移动通信无线基站塔顶放大器

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中国无线通信 2004年第4期10卷 36-37页

作者：爱立信(中国)有限公司

爱立信作为电信技术的先驱和新解决方案的开拓者，在通信领域已亨有140多年的盛誉。爱立信在多年的电信工业革命中发挥了很重要的作用，并且能够在适应市场竞争方而彰显强大优势。如令，在当前的技术革命中，爱立信再次成为先锋，其CDMA... 详细信息

爱立信作为电信技术的先驱和新解决方案的开拓者，在通信领域已亨有140多年的盛誉。爱立信在多年的电信工业革命中发挥了很重要的作用，并且能够在适应市场竞争方而彰显强大优势。如令，在当前的技术革命中，爱立信再次成为先锋，其CDMA2000 expander解决方案有助于在更复杂、经济更高效的环境中，更多地满足移动网络运营商的需求，从而掌控快速变化的市场客户群体，赢得更多用户。

关键词：爱立信公司 CDMA2000 expander 硬件设备市场

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广西通信技术 2004年第2期 22-23,32页

作者：郑世红爱立信(中国)有限公司广西南宁530022

CDMA2000是全球主要的3G移动通信标准之一。爱立信是提供整套CDMA2000解决方案的全球一级供应商,目前已投入商用的系统设备支持CDMA20001x和CDMA20001xEV DO,并且是CDMA20001xEV DV就绪的平台,可以平滑地演进到CDMA20001xEV DV及未来技... 详细信息

CDMA2000是全球主要的3G移动通信标准之一。爱立信是提供整套CDMA2000解决方案的全球一级供应商,目前已投入商用的系统设备支持CDMA20001x和CDMA20001xEV DO,并且是CDMA20001xEV DV就绪的平台,可以平滑地演进到CDMA20001xEV DV及未来技术。本文介绍了爱立信CDMA2000expander解决方案如何应对变化的市场需求。

关键词：爱立信公司 CDMA2000 expander 移动通信 RBS1120 塔顶放大器