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Energy Trapping Effect of stepped Electrode in Miniature AT-cut Quartz Resonator

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Energy Trapping Effect of Stepped Electrode in Miniature AT-...

第二届全国压电和声波理论及器件技术研讨会

作者： Robin Huang c.s.lam TXc corporation Ping Cheng CityTaoyuan CountyTaiwanR.O.C.

As the size of quartz resonator continues to shrink,beveling of the plano-plano quartz crystal is needed to reduce mounting loss and to sustain energy trapping so to have low motional resistance for *** beveling process though is time consuming and difficult to control for small size and low frequency quartz crystals.

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Aging Performance of small size MHz Quartz crystal Under High Drive

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Aging Performance of Small Size MHz Quartz Crystal Under Hig...

2011年全国压电和声波理论及器件应用研讨会

作者： c.s.lam Patrick Lin Kevin Lin TXc Technology Inc.MilipitasCaliforniaUSA TXc corporation Ping Cheng CityTaoyuan CountyTaiwan

＜正＞The recent advancement in fabrication and packaging technology has made small size MHz quartz crystals available down to 1.6mmx *** was considered unachievable ten years *** equipment like smartphone doesn’t se... 详细信息

关键词： crystal Drive Level Aging

A BRIEF VIEW OF THE cURRENT sTATE OF THE DEVELOPMENT AND AGING PERFORMANcE OF FIXED FREQUENcY sURFAcE AcOUsTIc WAVE(sAW) OscILLATOR

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A BRIEF VIEW OF THE CURRENT STATE OF THE DEVELOPMENT AND AGI...

2012全国压电和声波理论及器件技术研讨会

作者： c.s.lam P.Y.sU c.H.cHEN TXc Technology Inc.MilpitasCaliforniaUSA TXc corporation

The recent rapid expansion of optical fiber networking market fuels the demand for accurate 10000 MHz fixed frequency oscillators based on surface acoustic wave(sAW) ***,several suppliers can offer small size and cost efficient sMD single-end and differential sAW oscillators(sOs) with very good phase jitter *** customers prefer sO solution as it is free of the unsettling problems from some crystal oscillator(XO) solutions- high cost of high frequency fundamental(HFF) and inverted mesa(IM) crystal blanks,spurious modes,frequency jumping,drive level sensitivity,high cost of phase lock loop(PLL) die,*** paper is to provide a brief view of the current state of the development of fixed frequency *** on the aging data of more than 20,000 hours at 125℃,the authors also comment on the sO aging performance fabricated using different sAW wave-types.

关键词： sAW Oscillator Quartz crystal Aging

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谈谈振荡器

今日电子 2009年第5期 40-41页

作者： c.s.lam 爱普生美国电子公司

多年来，鉴于其高Q值和稳定的温度特性，石英晶体振荡器已成为消费、商业、工业及军工产品的重要时钟源。自2000至2001年的互联网市场衰退之后，石英晶体与晶体振荡器的需求每年以4％-10％的速度稳步增长。

关键词：石英晶体振荡器互联网市场温度特性军工产品高Q值时钟源

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PROPERTIEs OF MINIATURE X-AND Z’-ELONGATED REcTANGULAR AT-cUT QUARTZ REsONATORs OF DIFFERENT sIZEs

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PROPERTIES OF MINIATURE X-AND Z’-ELONGATED RECTANGULAR AT-C...

2012全国压电和声波理论及器件技术研讨会

作者： s.Y.PAO Q.Q.PAN J.s.cHUNG W.Y.cHANG T.LIN M.K.cHAO c.s.lam TXc(Ningbo)corporation

In this study,we present the different properties of beveling process,equivalent series resistance（EsR）,temperature curves,temperature hysteresis,and shock resistance of different sizes of X- and Z’-elongated rectangular AT-cut quartz *** results show the Z’-elongated quartz strip mounted on the two width sides has better performance in temperature hysteresis and shock *** for mode coupling,beveling process,and temperature curve,X- and Z’-elongated rectangular AT-cut quartz plate have their respective properties.

关键词： AT-cut Resonator Quartz crystal Plate Aspect Ratio

TRMT6 and TRMT61A facilitated acute pancreatitis severity via regulation of neutrophil function

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science china Life sciences 2025年

作者： Yuan Dong Li su sin Man lam cen Yan Yalan Deng Guotao Lu Jinkui Yang Guanghou shui Yingmei Feng Beijing Institute of Hepatology Beijing Youan HospitalCapital Medical University Department of science and Development Beijing Youan HospitalCapital Medical University Laboratory for clinical Medicine Capital Medical University Neuroscience Research Institute Peking University Center of Medical and Health AnalysisPeking University state Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of Sciences Pancreatic center Department of GastroenterologyAffiliated Hospital of Yangzhou UniversityYangzhou University Beijing Key Laboratory of Diabetes Research and care Department of EndocrinologyBeijing Tongren HospitalCapital Medical University

Dear Editor,Type 2 diabetes mellitus (T2DM) has been identified as a risk factor for increased severity in acute pancreatitis (AP)(Mikóet al,2018).However,to date,no studies have simultaneously included healthy individuals,T2DM patients,and AP patients to investigate which diabetes-associated metabolites are linked to AP severity.

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Pore size Distribution of High Performance Metakaolin concrete

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Journal of Wuhan University of Technology(Materials science) 2002年第1期17卷 42-46页

作者： c.s.Poon s.c.Kou L.lam Department of civil and structural Engineering The Hong Kong Polytechnic University Hong Kong China

The compressive strength, porosity and pore size distribution of high performance metakaolin (MK) concrete were investigated. concretes containing 0,5% , 10% and 20% metakaolin were prepared at a water / cementitious material ratio ( W/c) of 0. 30. In parallel, concrete mixtures with the replacement of cement by 20% fly ash or 5 and 10% silica fume were prepared for comparison. The specimens were cured in water at 27℃ for 3 to 90 days. The results show that at the early age of curing (3 days and 7 days), metakaolin replacements increase the compressive strength, but silica fume replacement slightly reduces the compressive strength. At the age of and after 28 days , the compressive strength of the concrete with metakaolin and silica fume replacement increases. A strong reduction in the total porosity and average pore diameter were observed in the concrete with MK 20% and 10% in the first 7 days.

关键词： high performance concrete metakaolin pore size distribution

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status and prospects for symmetric organic redox flow batteries

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Journal of Energy chemistry 2025年第1期100卷 125-143页

作者： Md Al Raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

关键词： Redox flow battery symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

chemical characteristics of aerosols at coastal station in Hong Kong.Ⅱ. Environmental behavior of trace elements during the April 1995 to April 1996

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Journal of Environmental sciences 2004年第2期16卷 212-221页

作者： K.s.lam Z.L.cheng s.c.Kot c.W.Tsang Department of civil and structural Engineering the Hong Kong Polytechnic UniversityResearch Center for Eco-Environmental Sciences Chinese Academy of SciencesDepartment of Mechanical Engineering The Hong Kong University of Science & Technology Clear Water BayDepartment of Applied Biology and Chemical Technology the Hong Kong Polytechnic University Hung Hom Hong Kong ChinaBeijing 100085 ChinaHong Kong ChinaHung Hom Hong Kong China

An one-year of sampling aerosol program was carried out during the period of April 1995 to April 1996 at coastal region, cape D′Aguilar, in Hong Kong. The trace element composition of aerosol particles(TsP and PM 10 ) were measured and analyzed by using the Instrumental Neutron Activation Analysis(INAA) and Inductive couple Plasma-Mass spectrometry(IcP-Ms) techniques. The results showed that the polluted elements such as: V, Zn, As, Pb, cd, sb, I, se, Bi, with high enrichment factor(E.F) values, are derived from anthropogenic sources, while sc, Al, Fe, Mn, sm, La, sr are less than 10 in E.F, these elements are related the crust and soil. The concentration of the trace elements are present seasonal variation i.e. summer low and winter high, whereas the V or noncrustal V(V *) present summer high and winter low, this phenomenon might be explained by local or regional oil combustion sources. Use three type of elemental ratio, e.g. La/sm, Mn */V * and Bi/Al indicate that both TsP and PM 10 of La/sm ratios are mainly related to soil and dust, Mn */V * are probably represent fossil combustion and Bi/Al are possibly associated with refuse incineration, ferromanganese alloys and aluminum production. The varimax rotation factor analysis for trace elements was performed. By means of the absolute principal component analysis(APcA) and multiple regression, the contribution of trace elements to possible sources and overall means of trace elements were estimated. The results showed that the present station is impacted by the anthropogenic species, although the quantities are different during the summertime and wintertime.

关键词： TsP PM 10 trace elements enhancement factor element ratios seasonal variation factor analysis

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