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Design of small-area multi-bit antifuse-type 1 kbit OTP memory

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Journal of Central South University 2009年第3期16卷 467-473页

作者：李龙镇 LEE J h KIM T h JIN K h PARK M h ha P B KIM Y h Department of Electronic Engineering Changwon National University Department of Computer Science and Technology Yanbian University

A multi-bit antifuse-type one-time programmable （OTP） memory is designed, which has a smaller area and a shorter programming time compared with the conventional single-bit antifuse-type OTP memory. While the conventional antifuse-type OTP memory can store a bit per cell, a proposed OTP memory can store two consecutive bits per cell through a data compression technique. The 1 kbit OTP memory designed with Magnachip 0.18 μm CMOS （complementary metal-oxide semiconductor） process is 34% smaller than the conventional single-bit antifuse-type OTP memory since the sizes of cell array and row decoder are reduced. And the programming time of the proposed OTP memory is nearly 50% smaller than that of the conventional counterpart since two consecutive bytes can be compressed and programmed into eight OTP cells at once. The layout area is 214 μm× 327 μ,, and the read current is simulated to be 30.4 μA.

关键词： multi-bit OTP programming time antifuse memory data compression

Power management unit chip design for automobile active-matrix organic light-emitting diode display module

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Journal of Central South University 2009年第4期16卷 621-628页

作者： KIM J h PARK J h KIM J h CAO T V LEE T Y BAN h J YANG K KIM h G ha P B KIM Y h Department of Electronic Engineering Changwon National University 9 Sarim-Dong Changwon 641-773 Korea Denso PS Electronics Corporation 47 Seongsan-Dong Changwon 641-315 Korea

A power management unit （PMU） chip supplying dual panel supply voltage, which has a low electro-magnetic interference （EMI） characteristic and is favorable for miniaturization, is designed. A two-phase charge pump circuit using external pumping capacitor increases its pumping current and works out the charge-loss problem by using bulk-potential biasing circuit. A low-power start-up circuit is also proposed to reduce the power consumption of the band-gap reference voltage generator. And the ring oscillator used in the ELVSS power circuit is designed with logic devices by supplying the logic power supply to reduce the layout area. The PMU chip is designed with MagnaChip＇s 0.25 μ high-voltage process. The driving currents of ELVDD and ELVSS are more than 50 mA when a SPICE simulation is done.

关键词： DC-DC converter AMOLED charge pumping power management unit (PMU) dual panel supply voltage

A novel benzo[4,5]furo[3,2-d]pyrimidine-based host as a n-type host for blue phosphorescent organic light-emitting diodes

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Science China Materials 2022年第4期65卷 1028-1033页

作者： Junsu ha Junseop Lim Jun Yeob Lee School of Chemical Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do16419Republic of Korea

An electron-transport-type host was synthesized using a benzo[4,5]furo[3,2-d]pyrimidine(BFP)core to develop a high triplet energy *** host was designed to have both the tetraphenylsilyl blocking group and the hole-transport-type carbazole *** the device application,the host was used as an electron-transport-type host mixed with a hole-transport-type 3,3'-di(9h-carbazol-9-yl)-1,1†-biphenyl(mCBP)host in the blue phosphorescent organic light-emitting diodes(PhO-LEDs)doped with a[[5-(1,1-dimethylethyl)-3-phenyl-1h-imidazo[4,5-b]pyrazin-1-yl-2(3h)-ylidene]-1,2-phenylene]bis-[[6-(1,1-dimethylethyl)-3-phenyl-1h-imidazo[4,5-b]pyrazin-1-yl-2(3h)-ylidene]-1,2-phenylene]iridium(Ir(cb)3)blue *** a result,the mCBP:CzBFPmSi mixed host showed high external quantum efficiency over 20%at 1000 cd m^(−2) and low efficiency roll-off in the blue PhOLEDs.

关键词： blue device host efficiency lifetime

The potential of rapid visco-analysis starch pasting profiles to gauge the quality of sorghum as a feed grain for chicken-meat production

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Animal Nutrition 2017年第1期3卷 11-18页

作者： ha h.Truong Ali Khoddami Amy F.Moss Sonia Y.Liu Peter h.Selle Poultry Research Foundation Faculty of Veterinary Science The University of Sydney Australian Poultry CRC University of New England Department of Plant and Food Sciences Faculty of Agriculture and Environment The University of Sydney

Thirteen extensively characterised grain sorghum varieties were evaluated in a series of 7 broiler bioassays. The efficiency of energy utilisation of broiler chickens offered sorghum-based diets is problematic and the bulk of dietary energy is derived from sorghum starch. For this reason, rapid visco-analysis(RVA)starch pasting profiles were determined as they may have the potential to assess the quality of sorghum as a feed grain for chicken-meat production. In review, it was found that concentrations of kafirin and total phenolic compounds were negatively correlated with peak and holding RVA viscosities to significant extents across 13 sorghums. In a meta-analysis of 5 broiler bioassays it was found that peak, holding,breakdown and final RVA viscosities were positively correlated with ME:GE ratios and peak and breakdown RVA viscosities with apparent metabolizable energy corrected for nitrogen(AMEn) to significant extents. In a sixth study involving 10 sorghum-based diets peak, holding and breakdown RVA viscosities were positively correlated with ME:GE ratios and AMEn. Therefore, it emerged that RVA starch pasting profiles do hold promise as a relatively rapid means to assess sorghum quality as a feed grain for chicken-meat production. This potential appears to be linked to quantities of kafirin and total phenolic compounds present in sorghum and it would seem that both factors depress RVA starch viscosities in vitro and, in turn, also depress energy utilisation in birds offered sorghum-based diets. Given that other feed grains do not contain kafirin and possess considerably lower concentrations of phenolic compounds, their RVA starch pasting profiles may not be equally indicative.

关键词： Kafirin Phenolics Poultry Rapid visco-analysis Sorghum Starch

A Remark on Strong Law of Large Numbers for Weighted U-Statistics

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Acta Mathematica Sinica,English Series 2014年第9期30卷 1595-1605页

作者： hyung-Tae ha Mei Ling hUANG Department of Applied Statistics Gachon University Department of Mathematics and Statistics Brock University

Let （X, Xn; n≥ 1} be a sequence of i.i.d, random variables with values in a measurable space （S,8） such that E｜h（X1, X2,..., Xm）｜〈 ∞, where h is a measurable symmetric function from Sm into R = （-∞, ∞）. Let {wn,i1,i2 im ; 1 ≤ i1 〈 i2 〈 …… 〈im 〈 n, n ≥ m} be a matrix array of real numbers. Motivated by a result of Choi and Sung （1987）, in this note we are concerned with establishing a strong law of large numbers for weighted U-statistics with kernel h of degree m. We show that whenever SUP n≥m max1〈i1〈i2〈…〈im≤｜wn i1,i2 i,im｜〈∞, where 0 = Eh（X1, X2,..., Xm）. The proof of this result is based on a new general result on complete convergence, which is a fundamental tool, for array of real-valued random variables under some mild conditions.

关键词： Strong law of large numbers weighted U-statistics complete convergence

Oxidative coupling of methane over LaAlO3 perovskite catalysts prepared by a co-precipitation method: Effect of co-precipitation ph value

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Journal of Energy Chemistry 2019年第8期28卷 1-8,I0001页

作者： Yujin Sim Jihoon Yoo Jeong-Myeong ha Ji Chul Jung Department of Chemical Engineering Myongji UniversityYongin 17058 Republic of Korea Clean Energy Research Center Korea Institute of Science and TechnologySeoul 02792 Republic of Korea

Oxidative coupling of methane(OCM) was conducted over LaAlO3X catalysts that were prepared by a coprecipitation method using different co-precipitation ph values(X = 6–10). The aim is to investigate the effect of p h values on the catalytic activity of La AlO3 catalysts in this reaction. The results showed that the co-precipitation ph value affected greatly on the formation of chemical species of precipitate precursors in the co-precipitation step, leading to different phases of the finally obtained LaAlO3 *** the co-precipitation ph value increased up to 8, the lanthanum-related phases such as La2 O3 and La(Oh)3 were gradually formed as by-products, preventing the formation of LaAlO3 perovskite crystalline structure and facilitating the formation of oxygen vacancies on catalyst surface. however, at ph value of9 or higher, the lanthanum content in the precipitate precursor was increased greatly. Not LaAlO3 perovskite but lanthanum-related phases were developed as main phases, reducing their catalytic activities in this reaction. Among LaAlO3 catalysts, the one prepared at ph = 8 showed the highest C2 yield due to its well-developed oxygen vacancies and electrophilic lattice oxygen. Therefore, the co-precipitation ph value strongly affected the LaAlO3 catalyst activity in OCM reaction. A precious ph control should be required to prepare various perovskite catalysts for the OCM.

关键词： LaAlO3 Perovskite Oxidative coupling of methane Co-precipitation ph value

Bowel intussusception caused by a percutaneously placed endoscopic gastrojejunostomy catheter: A case report

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World Journal of Gastrointestinal Surgery 2022年第6期14卷 621-625页

作者： Maarten WJ Winters Sjoerd Kramer Albert ha Mazairac Ewoud h Jutte Paul G van Putten Department of Gastroenterology and hepatology Medical Center LeeuwardenLeeuwarden 8934 ADNetherlands Department of Radiology Medical Center LeeuwardenLeeuwarden 8934 ADNetherlands Department of Surgery Medical Center LeeuwardenLeeuwarden 8934 ADNetherlands

BACKGROUND In adults,bowel intussusception is a rare diagnosis and is mostly due to an organic bowel *** rare cases,this is a complication of a percutaneously placed endoscopic gastro(jejunostomy)*** SUMMARY We describe a case of a 73-year-old patient with a history of myocardial infarction,chronic idiopathic constipation and Parkinson’s *** the admission of his Parkinson’s medication,a percutaneous endoscopic gastrostomy with jejunal extension(PEG-J)was *** patient presented three times at the emergency department of the hospital with intermittent abdominal pain with nausea and *** were no distinctive abnormalities from the physical and laboratory *** abdominal computed tomography scan showed a small bowel *** push endoscopy,a jejunal bezoar at the tip of the PEG-J catheter was found to be the cause of small bowel *** intussusception was resolved after removing the bezoar during push *** Endoscopic treatment of bowel intussusception caused by PEG-J catheter bezoar.

关键词： Bowel intussusception Percutaneous endoscopic gastrojejunostomy Bezoar Percutaneous endoscopic gastrostomy Case report

Observation and Numerical Simulations with Radar and Surface Data Assimilation for heavy Rainfall over Central Korea

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Advances in Atmospheric Sciences 2011年第3期28卷 573-590页

作者： Ji-hyun ha hyung-Woo KIM Dong-Kyou LEE Atmospheric Sciences Program School of Earth and Environmental SciencesSeoul National UniversitySeoul 151-747Korea

This study investigated the impact of multiple-Doppler radar data and surface data assimilation on forecasts of heavy rainfall over the central Korean Peninsula;the Weather Research and Forecasting(WRF) model and its three-dimensional variational data assimilation system(3DVAR) were used for this purpose. During data assimilation,the WRF 3DVAR cycling mode with incremental analysis updates(IAU) was used. A maximum rainfall of 335.0 mm occurred during a 12-h period from 2100 UTC 11 July 2006 to 0900 UTC 12 July *** radar data showed that the heavy rainfall was due to the back-building formation of mesoscale convective systems(MCSs).New convective cells were continuously formed in the upstream region,which was characterized by a strong southwesterly low-level jet(LLJ).The LLJ also facilitated strong convergence due to horizontal wind shear,which resulted in maintenance of the *** assimilation of both multiple-Doppler radar and surface data improved the accuracy of precipitation forecasts and had a more positive impact on quantitative forecasting(QPF) than the assimilation of either radar data or surface data *** back-building characteristic was successfully forecasted when the multiple-Doppler radar data and surface data were *** data assimilation experiments,the radar data helped forecast the development of convective storms responsible for heavy rainfall,and the surface data contributed to the occurrence of intensified low-level *** surface data played a significant role in enhancing the thermal gradient and modulating the planetary boundary layer of the model,which resulted in favorable conditions for convection.

关键词： radar and surface data data assimilation mesoscale convective system heavy rainfall

New tricyanoiron(Ⅲ) building blocks for the construction of molecule-based magnets

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Science China Chemistry 2010年第10期53卷 2106-2111页

作者： LAU Pui-ha WONG Wing-Tak LAU Tai-Chu Department of Biology and Chemistry City University of Hong Kong Department of Chemistry The University of Hong Kong

A series of tricyanoiron(Ⅲ) complexes with the general formula mer-[FeⅢ(5-Xsap)(CN)3]2-(X = h, Me, MeO, Cl or Br, saph2 = N-salicylidene-o-aminophenol) have been synthesized. These complexes were characterized by IR, ESI-MS, UV/Vis, elemental analysis and magnetic measurements. The structures of (PPh4)2[FeⅢ(sap)(CN)3] and (PPh4)2[FeⅢ(5-Mesap)(CN)3] have been determined by X-ray crystallography. These low-spin d5 tricyanoiron(Ⅲ) complexes are potential building blocks for the construction of molecule-based magnets.

关键词： cyano iron Schiff base building block molecule-based magnet