안정화제를 사용한 회수수의 고형분량 및 방치시간에 따른 시멘트 모르터의 특성

金光華,김기정,이문환,이세현,한천구 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

This study is intended to investigate the fundamental properties of cement mortar with solid content and leaving time of recycled water that stabilizing agent is added. According to the results, fluidity and air content does not make a big difference with variation of solid content. As the leaving time of recycled water is long, fluidity and air content increases. Setting time is shortened due to fine particle with an increase of solid content and leaving time. Compressive strength and flexural strength increase with an increase of solid content, and they increase at the leaving time of 1 day, but decrease after 2days. Length change by drying shrinkage is smaller than that of plain concrete, and is almost same with variation of solid content. And it is reduced at the leaving time of 1 day, but increases after that. Therefore, it analyzed that the effect of stabilizing agent is best under condition of adding ratio of 0.15%, solid content of 3% and leaving time of 1day, and it also works upto solid content of 5% and leaving time of 2days.

Associations of Plasma Glucagon Levels with Estimated Glomerular Filtration Rate, Albuminuria and Diabetic Kidney Disease in Patients with Type 2 Diabetes Mellitus

Hua-Xing Huang,Liang-Lan Shen,Hai-Yan Huang,Li-Hua Zhao,Feng Xu,Dong-Mei Zhang,Xiu-Lin Zhang,Tong Chen,Xue-Qin Wang,Yan Xie,Jian-Bin Su 대한당뇨병학회 2021 Diabetes and Metabolism Journal Vol.45 No.6

Background: Type 2 diabetes mellitus (T2DM) is characterized by elevated fasting glucagon and impaired suppression of postprandial glucagon secretion, which may participate in diabetic complications. Therefore, we investigated the associations of plasma glucagon with estimated glomerular filtration rate (eGFR), albuminuria and diabetic kidney disease (DKD) in T2DM patients.Methods: Fasting glucagon and postchallenge glucagon (assessed by area under the glucagon curve [AUCgla]) levels were determined during oral glucose tolerance tests. Patients with an eGFR <60 mL/min/1.73 m2 and/or a urinary albumin-to-creatinine ratio (UACR) ≥30 mg/g who presented with diabetic retinopathy were identified as having DKD.Results: Of the 2,436 recruited patients, fasting glucagon was correlated with eGFR and UACR (r=–0.112 and r=0.157, respectively; P<0.001), and AUCgla was also correlated with eGFR and UACR (r=–0.267 and r=0.234, respectively; P<0.001). Moreover, 31.7% (n=771) presented with DKD; the prevalence of DKD was 27.3%, 27.6%, 32.5%, and 39.2% in the first (Q1), second (Q2), third (Q3), and fourth quartile (Q4) of fasting glucagon, respectively; and the corresponding prevalence for AUCgla was 25.9%, 22.7%, 33.7%, and 44.4%, respectively. Furthermore, after adjusting for other clinical covariates, the adjusted odds ratios (ORs; 95% confidence intervals) for DKD in Q2, Q3, and Q4 versus Q1 of fasting glucagon were 0.946 (0.697 to 1.284), 1.209 (0.895 to 1.634), and 1.521 (1.129 to 2.049), respectively; the corresponding ORs of AUCgla were 0.825 (0.611 to 1.114), 1.323 (0.989 to 1.769), and 2.066 (1.546 to 2.760), respectively. Additionally, when we restricted our analysis in patients with glycosylated hemoglobin <7.0% (n=471), we found fasting glucagon and AUCgla were still independently associated with DKD.Conclusion: Both increased fasting and postchallenge glucagon levels were independently associated with DKD in T2DM patients.

Separation method of rolling bearing compound fault characteristics based on lmproved harmonic wavelet packet decomposition and fast lCA

Hua Huang,Wenhu Xue,Qianzhi Pang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.7

Compound fault characteristics in single-channel vibration signals of rolling bearings are difficult to separate. On the basis of improved harmonic wavelet packet decomposition and fast independent component analysis (FICA), this study proposes a new method to address this problem. First, a series of mutually independent frequency bands are obtained after harmonic wavelet packet decomposition of the initial vibration signal to satisfy the requirement that the number of observed signals must be larger than the number of source signals in the FICA algorithm. Second, the optimal frequency bands are selected based on the maximum kurtosis index and used as the input matrix of the FICA algorithm to separate the compound fault characteristics further. Lastly, accurate separation and extraction of the compound fault characteristics of the rolling bearings are realized. Results show that the proposed method can effectively separate the compound fault characteristics in the single-channel vibration signals of the bearings.

A Object tracking of robot manipulator built on fast stereo vision

Hua Huang,Sangchul Won 제어로봇시스템학회 2002 제어로봇시스템학회 국제학술대회 논문집 Vol.2002 No.10

Design method for self-healing capability of resin mineral composites with microcapsule based on cohesive element

Hua Huang,Huiyang Huang,Runlan Guo,Qianzhi Pang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.11

The self-healing of resin mineral composites by adding microcapsules has been widely used. However, it is difficult to determine the proportion of microcapsule to obtain the optimal self-healing performance because of the contradictory characteristics between the selfhealing efficiency and elastic modulus of composites. To address this problem, this study proposes a novel method to optimize the proportion of microcapsule under the constraints of engineering design requirements. The results show that (1) the damage evolution of self-healing resin mineral composites with microcapsule can be divided into four processes: damage accumulation, bond interface crack appearing, matrix crack appearing and fracture surface formation. (2) The position of aggregate has little effect on the mechanical properties of the overall composites structure, but it plays a decisive role in the distribution and size of cracks. (3) The relationship between the self-healing efficiency and the proportion of microcapsule is a nonlinear positive correlation, but the elastic modulus is a nonlinear negative correlation with the proportion of microcapsule. (4) The optimization results show that the optimal microcapsule proportion of a resin mineral composite machine tool is 1.68 %; at this time the mechanical properties of the material are reduced by 2.9 % and the self-healing efficiency is 25.38 %. The results provide a reference for the damage performance research and engineering design of microcapsule self-healing composites.

Three-Port Laparoscopic Exploration is not Sufficient for Patients with T4 Gastric Cancer

Huang, Hua,Jin, Jie-Jie,Long, Zi-Wen,Wang, Wei,Cai, Hong,Liu, Xiao-Wen,Yu, Hong-Mei,Zhang, Li-Wen,Wang, Ya-Nong Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.19

Gastric cancer continues to be a leading cause of cancer death. The majority of patients with gastric adenocarcinoma in China present with advanced disease. Ruling out unresectable cancers from an unnecessary "open" exploration is very important. The aim of this study was to assess the value of five-port anatomical laparoscopic exploration in T4 gastric cancer in comparison with three-port laparoscopic exploration and laparotomy exploration. We conducted a retrospective study on 126 patients with T4 stage scheduled for D2 curative gastrectomy based on computed tomography (CT) staging at Department of Gastric Cancer and Soft Tissue Sarcoma, Fudan University Shanghai Cancer Center, from Apr. 2011 to Apr. 2013. Laparotomy exploration (Group I), three-port laparoscopic exploration (Group II) or five-port anatomical laparoscopic exploration (Group III) were performed prior to radical gastrectomy. Accuracy rate for feasibility of D2 curative gastrectomy in laparotomy exploration and five-port anatomical laparoscopic exploration groups was higher than that in the three-port laparoscopic exploration group. Five-port anatomical laparoscopic exploration group had the highest accuracy resection rate (Group I vs Group II vs Group III,92.6% vs78.6% vs 97.7%; p<0.05) and shorter length of hospitalization (Group I vs Group II vs Group III, $9.58{\pm}4.17$ vs $6.13{\pm}2.85$ vs $5.00{\pm}1.81$; p<0.001). Three-port laparoscopic exploration has low accuracy rate for assessing feasibility of D2 curative gastrectomy and five-port anatomical laparoscopic exploration should be performed on patients with T4 gastric cancer.

Research of Fuzzy Logic-Controlled SMES for Power System Transient Voltage Stability

Huang Xiao-hua,Xiao Li-ye 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-

Superconducting Magnetic Energy Storage (SMES) is a power electronic based device with a superconducting coil that has the potential to bring essential functional characteristics to the utility transmission and distribution systems. This paper presents a new approach and corresponding experiments for fuzzy logic-controlled SMES to improve the transient voltage stability of electric power system. The SMES coil built for power utility applications has the following unique design characteristics: 0.2H, 20㎾/100kJ, 1㎄ dc current. Based on the result of SMES prototype experience, a mathematic model of power system and SMES are adopted. A fuzzy controller is assigned. Bus voltage is taken as the input signal to fuzzy controller. The fuzzy rule-bases are designed and explained. The validity of the suggested control strategies are confirmed by simulation and experimental tests. From the results they are demonstrated that transient voltage stabilizing effect by mean of SMES was very significant.

Development of Nutrient Solution for Chenopodiaceae Leaf Vegetables Based on Nutrient-Water Absorption Rate and Cation Ratio

Hua Zi Huang,Cheng Hao Zhang,Hyung Kweon Yoon,Tae Cheol Seo 한국원예학회 2007 Horticulture, Environment, and Biotechnology Vol.48 No.1

Nutrient solution for various Chenopodiaceae leaf vegetables was developed. Various strength (1/2, 1, and 3/2) of nutrient solution recommended by National Horticultural Research Institute, Korea was applied to the crops in deep flow technique system for 27 days. Growth of ‘Atras’ spinach, ‘Detroit Dark’ beet, and ‘Swiss’ red chard was highest in the treatment of 3/2 strength. The proper constitution of nutrient solution for the Chenopodiaceae leaf vegetables was 11 N, 2.5 P, 8 K, 2 Ca, and 2 me/L Mg. The crops were grown two times in March and September to examine the appropriateness of the nutrient solution. Relative growth rate and the amount of ascorbic acid treated with the nutrient solution were increased by 1.1-1.4 and 1.1-1.2 times, respectively, and the amount of chlorophyll was increased by 1.0-1.2 times.

Effect of Nutrient Solution for Hydroponics of Liliaceae Leaf Vegetables on the Amount of Ascorbic Acid in Chinese chive

Hua Zi Huang(황화자),Cheng Hao Zhang(장성호),Eun-Young Yang(양은영),Sang Gyu Lee(이상규),Ki Young Choi(최기영),Hyung Kweon Yun(윤형권) 한국생물환경조절학회 2007 한국생물환경조절학회 학술발표논문집 Vol.16 No.2

The effi cacy of daily chlorhexidine bathing for preventing healthcare-associated infections in adult intensive care units

( Hua-ping Huang ),( Bin Chen ),( Hai-yan Wang ),( Me He ) 대한내과학회 2016 The Korean Journal of Internal Medicine Vol.31 No.6

Background/Aims: Healthcare-associated infections (HAIs) in critically ill patients with prolonged length of hospital stay and increased medical costs. The aim of this study is to assess whether daily chlorhexidine gluconate (CHG) bathing will significantly reduce the rates of HAIs in adult intensive care units (ICUs). Methods: PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials were systematically searched until December 31, 2014 to identify relevant studies. Two authors independently reviewed and extracted data from included studies. All data was analyzed by Review Manager version 5.3. Results: Fifteen studies including three randomized controlled trials and 12 quasi- experimental studies were available in this study. The outcomes showed that daily CHG bathing were associated with significant reduction in the rates of primary outcomes: catheter-related bloodstream infection (risk ratio [RR], 0.44; 95% confidence interval [CI], 0.32 to 0.63; p < 0.00001), catheter-associated urinary tract infection (RR, 0.68; 95% CI, 0.52 to 0.88; p = 0.004), ventilator-associated pneumonia (RR, 0.73; 95% CI, 0.57 to 0.93; p = 0.01), acquisition of methicillin-resistant Staphylococcus aureus (RR, 0.78; 95% CI, 0.68 to 0.91; p = 0.001) and vancomycin-resistant Enterococcus (RR, 0.56; 95% CI, 0.31 to 0.99; p = 0.05). Conclusions: Our study suggests that the use of daily CHG bathing can signifi- cantly prevent HAIs in ICUs. However, more well-designed studies are needed to confirm these findings.