检索结果-南通市图书馆

Prediction of effluent concentration in a wastewater treatment plant using machine learning models

Journal of Environmental Sciences 2015年第6期27卷 90-101页

作者： Hong Guo Kwanho Jeong Jiyeon Lim Jeongwon Jo Young Mo kim Jong-pyo Park joon Ha kim Kyung Hwa Cho School of Environmental Science and Engineering Gwangju Institute of Science and Technology (GIST) School of Urban and Environmental Engineering Ulsan National Institute of Science and Technology HECOREA. INC

Of growing amount of food waste, the integrated food waste and waste water treatment was regarded as one of the efficient modeling method. However, the load of food waste to the conventional waste treatment process might lead to the high concentration of total nitrogen（T-N） impact on the effluent water quality. The objective of this study is to establish two machine learning models-artificial neural networks（ANNs） and support vector machines（SVMs）, in order to predict 1-day interval T-N concentration of effluent from a wastewater treatment plant in Ulsan, Korea. Daily water quality data and meteorological data were used and the performance of both models was evaluated in terms of the coefficient of determination（R^2）, Nash-Sutcliff efficiency（NSE）, relative efficiency criteria（d rel）. Additionally, Latin-Hypercube one-factor-at-a-time（LH-OAT） and a pattern search algorithm were applied to sensitivity analysis and model parameter optimization, respectively. Results showed that both models could be effectively applied to the 1-day interval prediction of T-N concentration of effluent. SVM model showed a higher prediction accuracy in the training stage and similar result in the validation ***, the sensitivity analysis demonstrated that the ANN model was a superior model for 1-day interval T-N concentration prediction in terms of the cause-and-effect relationship between T-N concentration and modeling input values to integrated food waste and waste water treatment. This study suggested the efficient and robust nonlinear time-series modeling method for an early prediction of the water quality of integrated food waste and waste water treatment process.

关键词： Artificial neural network Support vector machine Effluent concentration Prediction accuracy Sensitivity analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Blockade of PD-L1/PD-1 signaling promotes osteo-/odontogenic differentiation through Ras activation

引用

International Journal of Oral Science 2022年第2期14卷 164-173页

作者： So Mi Jeon Je Sun Lim Su Hwan Park Hyung joon kim Hyung-Ryong kim Jong-Ho Lee Department of Health Sciences The Graduate School of Dong-A UniversityBusanRepublic of Korea Department of Oral Physiology Periodontal Diseases Signaling Network Research CenterDental and Life Science InstituteSchool of DentistryPusan National UniversityYangsanRepublic of Korea Department of Pharmacology College of DentistryJeonbuk National UniversityJeonjuRepublic of Korea Department of Biomedical Sciences Dong-A UniversityBusanRepublic of Korea

The programmed cell death ligand 1(PD-L1)and its receptor programmed cell death 1(PD-1)deliver inhibitory signals to regulate immunological tolerance during immune-mediated ***,the role of PD-1 signaling and its blockade effect on human dental pulp stem cells(h DPSCs)differentiation into the osteo-/odontogenic lineage remain *** show here that PD-L1 expression,but not PD-1,is downregulated during osteo-/odontogenic differentiation of h ***,PD-L1/PD-1 signaling has been shown to negatively regulate the osteo-/odontogenic differentiation of h ***,depletion of either PD-L1 or PD-1 expression increased ERK and AKT phosphorylation levels through the upregulation of Ras enzyme activity,which plays a pivotal role during h DPSCs osteo-/odontogenic *** with nivolumab(a human anti-PD-1 monoclonal antibody),which targets PD-1 to prevent PD-L1 binding,successfully enhanced osteo-/odontogenic differentiation of h DPSCs through enhanced Ras activity-mediated phosphorylation of ERK and *** findings underscore that downregulation of PD-L1 expression accompanies during osteo-/odontogenic differentiation,and h DPSCs-intrinsic PD-1 signaling inhibits osteo-/odontogenic *** findings provide a significant basis that PD-1 blockade could be effective immunotherapeutic strategies in h DPSCs-mediated dental pulp regeneration.

关键词： death finding monoclonal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Dietary composition of birds in isolated ecosystems:a case study of Black Wood Pigeon in Republic of Korea

引用

Ecosystem Health and Sustainability 2020年第1期6卷 117-126,116页

作者： soon Kyoo Choi Yung Chul Park Sung Wan Park Jae Woong kim Woo Yuel kim Division of Forest Science Kangwon National UniversityChuncheonRepublic of Korea Department of Biology Kyungpook National UniversityDaeguRepublic of Korea Earth Ecological Environment Research Institute DaejeonRepublic of Korea Division of National Ecosystem Survey Research NIESeocheonRepublic of Korea

We studied the feeding ecology of the Black Wood Pigeon(Columba janthina),a species endemic to the East Asian Pacific Islands,and determined the species’dietary composition and food preferences on Ulleung Island,South Korea,through field *** March 2016 to February 2018,the diversity of food items consumed was low,with the 10 most common plant species(from a total of 33)accounting for over 80%.Food availability varied depending on plant abundance,but this influence was minimized because of factors such as delayed fruit *** were the most favored food items(60-68%)but were replaced by nuts and weed seeds during the spring and winter *** composition and food preferences were related to the abundance of food items based on their phenology,but a steady,high preference for Aphananthe aspera was observed throughout the study *** abundance of Prunus takesimensis in June was correlated with changes in the Black Wood Pigeon *** study is the first to assess the feeding ecology of Black Wood Pigeons using field observations and suggests that the availability of different food items affects population changes on the East Asian Pacific islands.

关键词： Dietary composition feeding preference field observations fruit phenology seasonal variation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pretransplant absolute monocyte count in peripheral blood predicts posttransplant tumor prognosis in patients undergoing liver transplantation for hepatocellular carcinoma

引用

Hepatobiliary & Pancreatic Diseases International 2014年第3期13卷 250-258页

作者： Young-Kyu kim Seong Hoon kim Seung-Duk Lee soon-ae Lee Sang-Jae Park Center for Liver Cancer National Cancer Center323 Ilsan-ro Ilsandong-gu Goyang-si Gyeonggi-do Republic of Korea Department of Surgery College of Medicine Kangwon National University 1 Kangwondaehak-gilChuncheon-si Gangwon-do 200-701 Republic of Korea

BACKGROUND: Preoperative absolute monocyte count in peripheral blood(AMCPB) is closely associated with prognoses in not only various malignancies but also hepatocellular carcinoma(HCC). The purpose of this study was to evaluate whether pretransplant AMCPB predicts posttransplant outcomes in patients with HCC undergoing liver transplantation(LT).METHOD: We retrospectively analyzed relationships between clinicopathologic factors involving pretransplant AMCPB and tumor recurrence or survival in 256 patients who had undergone LT for HCC between January 2005 and April ***: ROC curve analysis showed that AMCPB >200/mm3was a risk factor for tumor recurrence; 43 patients showed higher AMCPB(>200/mm3), whereas 213 showed lower AMCPB(≤200/mm3) at the time of LT. On multivariate analysis,pretransplant high AMCPB, positive findings in pretransplant18F-FDG PET/CT, pathological maximal tumor size >5 cm,intrahepatic metastasis, moderately or poorly differentiated tumor and microvascular invasion were independent factors affecting recurrence-free survival. When we performed subgroup analysis based on the Milan criteria, high AMCPB was an independent factor for predicting HCC recurrence in patients with tumor beyond the Milan criteria(P=0.004), and not for patients within the ***: This study demonstrated that pretransplant AMCPB could predict tumor recurrence after LT for HCC,especially in patients with tumor beyond the Milan criteria.

关键词： liver transplantation hepatocellular carcinoma recurrence survival monocyte count

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Clonal evolution of hepatitis B virus polymerase gene mutations during lamivudine-adefovir combination treatment

引用

World Journal of Gastroenterology 2012年第44期18卷 6437-6446页

作者： soon Young Ko Byung Kook kim So Young Kwon Kyun-Hwan kim Jeong Han kim Won Hyeok Choe Chang Hong Lee Department of Internal Medicine Konkuk University School of MedicineSeoul 143-729South Korea Department of Pharmacology Konkuk University School of MedicineSeoul 143-729South Korea

AIM:To identify hepatitis B virus polymerase gene mutations during antiviral therapy using lamivudineadefovir sequential monotherapy followed by lamivudine-adefovir combination ***:The patient cohort included four adult chronic hepatitis B patients who had undergone sequential monotherapy,first with lamivudine(LMV) and then,after developing viral breakthrough,with adefovir(ADV) *** of the patients had non-response or viral breakthrough after LMV-ADV sequential monotherapy,which resulted in the switching of their antiviral regimen to LMV-ADV combination *** serum samples from the four patients who showed non-response to rescue LMV-ADV combination therapy were collected sequentially at a time before the antiviral treatment and then during the LMV monotherapy,ADV monotherapy,and LMV-ADV combination *** the genotypic analysis,the whole 1310-bp polymerase gene region was amplified,cloned and ***:All patients had been previously treated with 100 mg of LMV once daily for a 15-to 26-mo *** emergence of resistance mutations to LMV,such as rtM204V/I and/or rtL180M,were found in all *** antiviral regimens were switched to ADV monotherapy as the second line *** patients had viral breakthrough or non-response after the LMV-ADV sequential ***-resistant mutations were detected after 13 to 19 mo of LMV-ADV sequential *** rtA181V/T mutations were predominantly identified during the ADV treatment in the LMV-resistant ***-seven of 38 clones were combined with an amino acid change at rt181;three clones had mutations in rt236 and one clone had a combined *** rtA181V/T mutations were not suppressed by the LMV-ADV combination ***-nine of 64 clones showed an rtA181V/T mutation and six clones showed combined mutations in rt181 and *** in rt204 re-emerged during the combination *** rt181 and rt204 mutations did not co-exist in one clon

关键词： Hepatitis B virus Lamivudine Adefovir Mutation Drug resistance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Contact surface fatigue life for roller rack pinion system

引用

Journal of Central South University 2012年第12期19卷 3454-3459页

作者： kim Chang-hyun CHOI Heung-soap KWON soon-man Department of Mechanical Design and Manufacturing Engineering Changwon National UniversityChangwon 641-773Korea Department of Mechano-Informatics and Design Engineering Hongik UniversitySejong 339-701Korea

A roller rack pinion(RRP)system,which consists of a rack-bar and a cam pinion,transforms a rotation motion into linear *** rack-bar has a series of roller train and meshes with the cam ***,the exact tooth profile of the cam pinion and the non-undercut condition to satisfy the required performance have been proposed with the introduction of the profile shift ***,the load stress factors are investigated under the variation of the shape design parameters to predict the gear surface fatigue limit which is strongly related to the gear noise and vibration at the contact *** results show that the pitting life can be extended significantly with the increase of the profile shift coefficient.

关键词： roller rack pinion profile shift coefficient load stress factor pitting life

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new multiple noncontinuous puncture(pointage)technique for corneal tattooing

引用

International Journal of Ophthalmology(English edition) 2015年第5期8卷 928-932页

作者： Jin Hyoung Park Taewoong Um Myoung joon kim Hungwon Tchah Jae Yong kim Department of Ophthalmology University of Ulsan College of MedicineAsan Medical Center

AIMTo assess the safety and cosmetic efficacy of a new multiple noncontinuous transepithelial puncture technique for tattooing a decompensated *** was a non-comparative clinical case series study. The study examines 33 eyes in 33 patients with total corneal opacity due to corneal decompensation, which developed following intraocular surgery. Corneal tattooing was performed using the multiple noncontinuous transepithelial puncture technique (i.e. pointage). The safety of this new surgical strategy was assessed by occurrence of adverse events for the follow-up period. The cosmetic efficacy was determined by the patient's cosmetic satisfaction and independent observer's opinion about patient *** women and 26 men were included in the study. The mean age was 46.4±17.5y (range: 7-67). In total, 30 of 33 patients (91%) reported cosmetic satisfaction within the follow-up period. Only 3 patients (9%) required additional tattooing due to cosmetic unsatisfaction. Cosmetic outcomes were analyzed and classified as excellent or good in 13 (39%) and 17 (52%) patients, respectively. No serious adverse events developed, except delayed epithelial healing in 3 *** cosmetic outcomes of the multiple noncontinuous transepithelial puncture technique for corneal tattooing were good. The safety of this method is higher than conventional procedures. This new procedure also provides improved cost-effectiveness and safety over current corneal tattooing techniques.

关键词： corneal tattooing total corneal opacity corneal decompensation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Graft-to-recipient weight ratio lower to 0.7% is safe without portal pressure modulation in right-lobe living donor liver transplantation with favorable conditions

引用

Hepatobiliary & Pancreatic Diseases International 2014年第1期13卷 18-24页

作者： Seung Duk Lee Seong Hoon kim Young-Kyu kim soon-Ae Lee Sang-Jae Park Center for Liver Cancer National Cancer Center

BACKGROUND: The low graft-to-recipient weight ratio(GRWR) in adult-to-adult living donor liver transplantation(LDLT) is one of the major risk factors affecting graft survival. The goal of this study was to evaluate whether the lower limit of the GRWR can be safely reduced without portal pressure modulation in right-lobe LDLT. METHODS: From 2005 to 2011, 317 consecutive patients from a single institute underwent LDLT with right-lobe grafts without portal pressure modulation. Of these, 23 had a GRWR of less than 0.7%(group A), 27 had a GRWR of ≥0.7%, <0.8%(group B), and 267 had a GRWR of more than and equal to 0.8%(group C). Medical records, including recipient, donor, operation factors, laboratory findings and complications were reviewed retrospectively. RESULTS: The baseline demographics showed low model for end-stage liver disease score(mean 16.3±8.9) and high percentage of hepatocellular carcinoma(231 patients, 72.9%). Three groups by GRWR demonstrated similar characteristics except recipient body mass index and donor gender. For smallforsize syndrome, there were 3(13.0%) in group A, 1(3.7%) in group B, and 2 patients(0.7%) in group C(P<0.001). Hepatic artery thrombosis was more frequently observed in group A than in groups B and C(8.7% vs 3.7% vs 1.9%, P=0.047). However, among the three groups, graft survival rates at 1 year(100% vs 96.3% vs 93.6%) and 3 years(91.7% vs 73.2% vs 88.1%) were not different(P=0.539). In laboratory measurements,there was no group difference in total bilirubin and albumin. However, prothrombin time was longer in group A within postoperative 1 week and platelet count was lower in groups A and B within postoperative 1 month. CONCLUSION: A GRWR lower to 0.7% is safe and does not need to modulate portal pressure in adult-to-adult LDLT using the right-lobe in favorable conditions including low model for end-stage liver disease score.

关键词： graft-to-recipient weight ratio living donor liver transplantation small-for-size graft small-for-size syndrome

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance Enhancement of a Pump Impeller Using Optimal Design Method

引用

Journal of Thermal Science 2017年第2期26卷 119-124页

作者： Seok-Yun Jeon Chul-Kyu kim Sang-Moon Lee joon-Yong Yoon Choon-Man Jang Korea Institute of Civil Engineering and Building Technology Goyang-siGyeonggi-do10223Korea Dep.of Mechanical Engineering Hanyang UniversityAnsanGyeonggi-do15588Korea

This paper presents the performance evaluation of a regenerative pump to increase its efficiency using optimal design method. Two design parameters which define the shape of the pump impeller, are introduced and analyzed. Pump performance is evaluated by numerical simulation and design of experiments(DOE). To analyze three-dimensional flow field in the pump, general analysis code, CFX, is used in the present work. Shear stress turbulence model is employed to estimate the eddy viscosity. Experimental apparatus with an open-loop facility is set up for measuring the pump performance. Pump performance, efficiency and pressure, obtained from numerical simulation are validated by comparison with the results of experiments. Throughout the shape optimization of the pump impeller at the operating flow condition, the pump efficiency is successfully increased by 3 percent compared to the reference pump. It is noted that the pressure increase of the optimum pump is mainly caused by higher momentum force generated inside blade passage due to the optimal blade shape. Comparisons of pump internal flow on the reference and optimum pump are also investigated and discussed in detail.

关键词： Regenerative Pump Efficiency Impeller Optimal Design Computational Fluid Dynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bilateral dislocation of the long head of biceps tendon with intact rotator cuff tendon:A case report

引用

世界临床病例杂志 2023年第26期11卷 6304-6310页

作者： Hyuk-joon Sohn Chul-Hyun Cho Du-Han kim Department of Orthopedic Surgery Keimyung University Dongsan HospitalKeimyung University School of MedicineDaegu 42601South Korea

BACKGROUND Dislocation of the long head of biceps tendon(LHBT)usually involves rotator cuff injury,and isolated dislocation with an intact rotator cuff is *** cases of isolated dislocation have been ***,to the best of our knowledge,there has been no report of bilateral dislocation of the LHBT without rotator cuff *** SUMMARY A 23-year-old male presented to our outpatient clinic with left side dominant pain in both *** patient had no history of trauma or *** patient underwent intra-articular injection and physical therapy,but his symptoms *** on preoperative imaging,the diagnosis was bilateral dislocation of the *** of the bicipital groove was detected in both *** dislocation of the biceps tendon over an intact subscapularis tendon was identified by diagnostic *** biceps tenodesis was performed and continuous passive motion therapy was administered immediately after *** patient’s pain was resolved,and full functional recovery was achieved,and he was satisfied with the condition of his *** This study describes a rare case of bilateral dislocations of the LHBT without rotator cuff injury due to dysplasia of the bicipital groove.

关键词： Shoulder Biceps Dislocation Rotator cuff Tenodesis Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：