Probabilistic Assessment of Wave Overtopping of Seawall at Busan, Korea

Qie, Luwen(퀴루엔),Choi, Byung-Ho(최병호),Xie, ShiLeng(씨시렝) 한국해안해양공학회 2008 한국해안해양공학회 논문집 Vol.20 No.2

본 논문에서는 세 가지 모형(Owen 모형, Van der Meer & Janssen 모형, Hedges & Reis 모형)을 적용하여 월파의 확률적 평가를 수행하였다. 건설중인 부산 신항 방파제의 월파 확률 예측 값을 도출하는 데에 있어서 Hedges & Reis 모형이 월파에 의한 방파제 파괴 확률분석과 Level II와 Level III 신뢰성 해석을 이용하는 것으로 적합하여 건설비용의 절감을 위하여 파괴가능성이 낮은 월파의 천단고를 제안하였다. In this paper, three classical overtopping models: Owen model, Van der Meer & Janssen model and Hedges & Reis model were used to calculate the failure probability of wave overtopping of seawalls. Among of them, the Hedges & Reis model was regarded as a moderate method to analyze the failure probability of wave overtopping of seawalls and the probabilistic assessments of wave overtopping were carried out for a constructing seawall at Busan in Korea by Level II and Level III reliability methods. Considering the cost of construction, an appropriate crest level was proposed for a certain rate of wave overtopping at a lower failure probability.

Calculation of Failure Probability of Caisson Breakwater Considering Correlation between Variables

Qie, Lu Wen,Choi, Byung Ho,Xie, Shi Leng Korean Society of Civil Engineering 2009 KSCE JOURNAL OF CIVIL ENGINEERING Vol.13 No.1

In the general stochastic space, an asymptotic approximation of failure probability with random variables is presented in this paper. The extended Hasofer-Lind method for reliability index, together with asymptotic approximations of failure probability with correlated variables, is used in the reliability analysis for anti-sliding and anti-overturning of a caisson breakwater. The probability of failure modes of breakwater are carried out for an existing caisson breakwater at Qinhuangdao, China, and the accuracy of calculation result are also validated by comparing with the Level III method. It is shown that the probability of failure calculated by assuming independence of variables is less than that considering correlation among variables.

Calculation of Failure Probability of Caisson Breakwater Considering Correlation between Variables

Lu Wen Qie,최병호,Shi Leng Xie 대한토목학회 2009 KSCE JOURNAL OF CIVIL ENGINEERING Vol.13 No.1

In the general stochastic space, an asymptotic approximation of failure probability with random variables is presented in this paper. The extended Hasofer-Lind method for reliability index, together with asymptotic approximations of failure probability with correlated variables, is used in the reliability analysis for anti-sliding and anti-overturning of a caisson breakwater. The probability of failure modes of breakwater are carried out for an existing caisson breakwater at Qinhuangdao, China, and the accuracy of calculation result are also validated by comparing with the Level III method. It is shown that the probability of failure calculated by assuming independence of variables is less than that considering correlation among variables.

Enhanced biodrying of dewatered sewage sludge by supplementing easily biodegradable carbon sources

양빈친 ( Ben Qie Yang ),장레이 ( L Ei Zhang ),장덕진 ( Deok Jin Jahng ) 한국물환경학회(구 한국수질보전학회) 2011 공동 추계학술발표회 Vol.2011 No.-

Probabilistic Assessment of Wave Overtopping of Seawall at Busan, Korea

퀴루엔,최병호,씨시렝,Qie, Luwen,Choi, Byung-Ho,Xie, ShiLeng Korean Society of Coastal and Ocean Engineers 2008 한국해안해양공학회 논문집 Vol.20 No.2

In this paper, three classical overtopping models: Owen model, Van der Meer & Janssen model and Hedges & Reis model were used to calculate the failure probability of wave overtopping of seawalls. Among of them, the Hedges & Reis model was regarded as a moderate method to analyze the failure probability of wave overtopping of seawalls and the probabilistic assessments of wave overtopping were carried out for a constructing seawall at Busan in Korea by Level II and Level III reliability methods. Considering the cost of construction, an appropriate crest level was proposed for a certain rate of wave overtopping at a lower failure probability. 본 논문에서는 세 가지 모형(Owen 모형, Van der Meer & Janssen 모형, Hedges & Reis 모형)을 적용하여 월파의 확률적 평가를 수행하였다. 건설중인 부산 신항 방파제의 월파 확률 예측 값을 도출하는 데에 있어서 Hedges & Reis 모형이 월파에 의한 방파제 파괴 확률분석과 Level II와 Level III 신뢰성 해석을 이용하는 것으로 적합하여 건설비용의 절감을 위하여 파괴가능성이 낮은 월파의 천단고를 제안하였다.

상단 사각(斜角) 직립 방파제에 작용하는 외력 산정

김동철(Kim Dong Chule),치루엔(Qie Lu Wen),최병호(Choi Byung Ho) 대한토목학회 2007 대한토목학회 학술대회 Vol.2007 No.10

A Study on the Trend of the Upper Tropospheric Water Vapor over the Tibetan Plateau in Summer

Xiran Xu,Hongying Tian,Kai Qie,Xin He,Ruhua Zhang,Houwang Tu 한국기상학회 2021 Asia-Pacific Journal of Atmospheric Sciences Vol.57 No.2

Using ERA-Interim and ERA-5 reanalysis datasets combined with measurements from the Microwave Limb Sounder (MLS), we divided the Tibetan Plateau (TP) into three regions to analyse the long-term trends of water vapor in the upper troposphere and its possible mechanisms. The conclusions are as follows. The water vapor at 200 hPa in the summers from 1979 to 2016 over Region 1 (34°N-40°N, 80°E-100°E) shows a positive trend, which is caused by the rising surface temperature and the northward shift of the South Asian High (SAH). The positive trend of water vapor over Region 2 (28°N-33°N, 80°E-90°E) is attributed to the enhanced South Asian summer monsoon, which leads to increases in horizontal transport of water vapor and vertical water vapor flux. The increase in the vertical transport of water vapor is responsible for the increase in water vapor over the Region 2. The negative trend of water vapor over Region 3 (27°N-30°N, 93°E-98°E) is mainly due to the weakening of water vapor transport caused by the weakening of convective activities.

The performance of wastewater treatment by two-species immobilized lignin-degrading mycelial pellet GX-1310

Gaijuan GUO,Wei GUO,Xia DU,Qie FENG,Jinda LI,Hong YAN 대한환경공학회 2021 Environmental Engineering Research Vol.26 No.4

This study found a new type of immobilized mycelial pellet GX-1310, which can better treat industrial wastewater. Among them, Aspergillus fumigatus G-13 (degradable lignin) was combined with Bacillus cereus X10-1-2 (having the ability to produce cellulase), and the two synergistically produce strong degradation ability. Taking combined mycelial pellet as the research object, its ability to treat papermaking wastewater, heavy metal wastewater and dye wastewater was investigated. The combined mycelial pellet was superior to the single fungal mycelium in the degradation of lignocellulose, removal of heavy metal ions and adsorption capacity of dyes. And the combined mycelial pellet has a wide range of application conditions (temperature range 28-34℃ and pH range 4-8), which can maintain high processing capacity for papermaking wastewater, heavy metal wastewater and dye wastewater. After three batches of wastewater treatment, the combined mycelial pellet still maintains high activity and can continuously treat wastewater. The study fixed the single fungal mycelium together with cellulose-degrading bacteria, the strains producing different enzymes were combined to form a multi-functional combined mycelial pellet. This method provides a new way for industrial wastewater treatment.

Research on the temperature characteristics of SiPM-based LaBr3(Ce) detectors

Yu Tao,Guo Siming,Wu Jinjie,An Zhenghua,Qie Xiaoyu,Guo Kaiyue 한국물리학회 2023 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.82 No.1

When a satellite-borne detector is being ground calibrated, a standard detector is required to determine the monochromatic X-ray beam energy and intensity. For this purpose, a SiPM-based LaBr3(Ce) detector has been developed. The environmental temperature change may substantially afect the performance of the detector, thus afecting the accuracy of the ground calibration results. To study the efect of temperature change on the performance of the LaBr3(Ce) detector, the performance of the LaBr3(Ce) detector was tested with 241Am and 137Cs γ-ray sources in the high- and low-temperature test chambers. The results showed that within the range of – 20 to 40 °C, the energy resolution of the LaBr3(Ce) detector does not change by more than 1%, nor does the peak-to-total ratio of 241Am and 137Cs. The temperature change has little efect on the performance of the LaBr3(Ce) detector, which meets the requirements for use as a beam monitor. However, the peak location of the radioactive source varies signifcantly with temperature, and the diference with the peak location at room temperature is within 17%. To reduce the variation in the gain of the LaBr3(Ce) detector with temperature, it is necessary to optimize the compensation design of the temperature gain to ensure the stability of the detector gain at various temperatures.

Metallogeny of the Poyi magmatic Cu-Ni deposit: revelation from the contrast of PGE and olivine composition with other Cu-Ni sulfide deposits in the Early Permian, Xinjiang, China

Yuegao Liu,Xinbiao Lv,Longshuai Yang,Hufei Wang,Yafei Meng,Qie Yi,Bo Zhang,Jianliang Wu,Jian Ma 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.4

Permian mafic-ultramafic intrusions in or besides the Central Asian Orogenic Belt (CAOB) have been the focus of several recent studies, mainly located in Altay, East Tianshan, and Beishan Rift from north to south. Some of them host economic magmatic sulfide deposits. Among those, Poyi is a large magmatic Cu-Ni sulfide deposit related to ultramafic rock in Beishan Rift. Poyi does not have massive ore, but only disseminated ore in hornblende- peridotite, so Poyi is not as rich as the Karatongk Cu-Ni deposit in the Altay area or the Huangshandong and Tulargen Cu- Ni sulfide deposits in Eastern Tianshan. To address these questions, this paper contrasts the feature of PGE (Platinum Group Element) and olivine composition in magmatic Cu-Ni deposits between three regions (Altay, East Tianshan, and Beishan Rift) to provide a view of the metallogenic process of the Poyi magmatic Cu-Ni deposit. The degree of sulfide segregation (DSS) of Poyi is around 0.01%; the value of R (the ratio of the mass of silicate magma to the mass of sulfide that reached equilibrium together) is 500–5000, and is 2333 on average; the R value of Cu-Ni sulfide deposits in East Tianshan is in the range of 100–500, and the degree of sulfide segregation is about 0.013%; Poyi Cu-Ni deposit is not as rich as the magmatic Cu-Ni deposits in East Tianshan, probably because the degree of sulfide segregation of the former (0.01%) is lower than that of the latter (0.013%). From Beishan area to East Tianshan and then to Altay Region, the R value changed from 2333 to 100–500 and then to 100 according to the theory of Naldrett (2011). Poyi does not have the potential to be a PGE deposit. The olivine of Poyi has higher contents of MgO and SiO2 and lower contents of FeO and CaO, which reach sulfur saturation more easily, but due to the lack of sulfur, it is still very difficult to reach sulfur saturation, and therefore the olivine of Poyi has the highest Ni content among the Permian magmatic Cu-Ni deposits in Xinjiang.