Use of High-performance Graphics Processing Units for Power System Demand Forecasting

Ting He,Ke Meng,ZhaoYang Dong,Yong-Taek Oh,Yan Xu 대한전기학회 2010 Journal of Electrical Engineering & Technology Vol.5 No.3

Load forecasting has always been essential to the operation and planning of power systems in deregulated electricity markets. Various methods have been proposed for load forecasting, and the neural network is one of the most widely accepted and used techniques. However, to obtain more accurate results, more information is needed as input variables, resulting in huge computational costs in the learning process. In this paper, to reduce training time in multi-layer perceptron-based short-term load forecasting, a graphics processing unit (GPU)-based computing method is introduced. The proposed approach is tested using the Korea electricity market historical demand data set. Results show that GPU-based computing greatly reduces computational costs.

ADRC Applied in Chaotic Arrhythmic Heartbeats Control

Ting HE,Donghai LI 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

Control arrhythmic heartbeats has always been an important issue in cardiology. In this work, the capability of active disturbance rejection control (ADRC) to suppress the chaotic arrhythmic heartbeats is studied. The modified Van der Pol model is employed as mathematical model to describe the normal and pathological heart rhythms. The ADRC method is applied in three channels of the chaotic cardiac model. Compared with the commonly used time-delayed feedback control method, the ADRC method manifests better performance, thus worth further investigation and development in the field of chaotic arrhythmic heart beats control.

An analytical solution of bending thin plates with different moduli in tension and compression

He, Xiao-Ting,Hu, Xing-Jian,Sun, Jun-Yi,Zheng, Zhou-Lian Techno-Press 2010 Structural Engineering and Mechanics, An Int'l Jou Vol.36 No.3

Materials which exhibit different elastic moduli in tension and compression are known as bimodular materials. The bimodular materials model, which is founded on the criterion of positive-negative signs of principal stress, is important for the structural analysis and design. However, due to the inherent complexity of the constitutive relation, it is difficult to obtain an analytical solution of a bimodular bending components except in particular simple problems. Based on the existent simplified model, this paper solves analytically bending thin plates with different moduli in tension and compression. By using the continuity conditions of stress components in unknown neutral layer, we determine the location of the neutral layer, and derive the governing differential equation for deflection, the flexural rigidity, and the internal forces in the thin plate. We also use a circular thin plate with bimodulus to illustrate the application of this solution derived in this paper. The results show that the introduction of different moduli has influences on the flexural stiffness of the bending thin plate.

Characterization of Cucurbita maxima Fruit Metabolomic Profiling and Transcriptome to Reveal Fruit Quality and Ripening Gene Expression Patterns

He-Xun Huang,Ting Yu,Jun-Xing Li,Shu-Ping Qu,왕만만,Ting-Quan Wu,Yu-Juan Zhong 한국식물학회 2019 Journal of Plant Biology Vol.62 No.3

Pumpkin (Cucurbita maxima) fruit is the importantdietary source of carotenoid and is known for the goodflavour and texture due to the accumulation of sugar andstarch. However, lack of transcriptional information hindersour understanding of the molecular mechanisms underlyingfruit quality attributes and nutrition in C. maxima. To provideinsight into transcriptional regulation of fruit quality formationof C. maxima, quality analysis and high-throughput RNAsequencing of fruits at different developing stages werecharacterized. The quality analyses consist of dry mattervalues, percent soluble solids, carotenoid contents, and starchand sugar contents in seven stages of fruit development. Fruit transcriptome of C. maxima at five stages throughoutdevelopment was assembled to elucidate the molecularregulation of fruit development. Almost 18 billion nucleotidebases were sequenced in total, and 48,471 unigenes weredetected. A total of 32,397 (66.8%) unigenes were identifiedto be differentially expressed. We found there was a correlationbetween ripening-associated transcripts and metabolites andthe functions of regulating genes. KEGG analysis showedthere are multiple transcripts enriched in starch, sugar, carotenoid,plant hormone signal transduction and pectin pathways andseveral pathways regulating quality formation were identified. Candidate genes involving in sugar, starch, pectin, fruitsoftening and carotenoid metabolism in fruit were firstlyidentified for the species of C. maxima. Combining the sugar, starch and carotenoid accumulating patterns duringfruit development, a series of possible rate limiting geneswere identified. These findings will provide valuable informationfor further studies regarding fruit quality and development.

Rapid separation and identification of 31 major saponins in Shizhu ginseng by ultra-high performance liquid chromatography-electron spray ionization-MS/MS

Ting-Ting Sun,Xin-Lei Liang,He-Yun Zhu,Xu-Ling Peng,Xing-Jie Guo,Long-Shan Zhao 고려인삼학회 2016 Journal of Ginseng Research Vol.40 No.3

Background: Among the various ginseng strains, Shizhu ginseng is endemic to China, mainly distributed in Kuandian Manchu Autonomous County (Liaoning Province, China); however, not much is known about the compounds (especially saponins) in Shizhu ginseng. Methods: A rapid, sensitive, and reliable ultra-high performance liquid chromatography coupled with MS/MS (UHPLCeMS/MS) method was developed to separate and identify saponins in Shizhu ginseng. Results: The separation was carried out on a Waters ACQUITY UPLC BEH C18 column (100 mm × 2.1 mm, 1.7 ㎛) with acetonitrile and 0.1% formic acid aqueous solution as the mobile phase under a gradient elution at 40℃. The detection was performed on a Micromass Quattro Micro API mass spectrometer equipped with electrospray ionization source in both positive and negative modes. Under the optimized conditions, a total of 31 saponins were identified or tentatively characterized by comparing retention time and MS data with related literatures and reference substances. Conclusion: The developed UHPLCeMS/MS method was suitable for identifying and characterizing the chemical constituents in Shizhu ginseng, which provided a helpful chemical basis for further research on Shizhu ginseng.

The impact of lymph node dissection on survival in patients with clinical early-stage ovarian cancer

Ting Deng,Qidan Huang,Ting Wan,Xiaoling Luo,Yanling Feng,He Huang,Jihong Liu 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.3

Objective: To estimate the impact of lymph node dissection on survival in patients withapparent early-stage epithelial ovarian cancer (EOC). Methods: We conducted a retrospective review of patients with clinical stage I–II EOC. Allpatients underwent primary surgery at Sun Yat-sen University Cancer Center between January2003 and December 2015. Demographic features and clinicopathological information as wellas perioperative adverse events were investigated, and survival analyses were performed. Results: A total of 400 ovarian cancer patients were enrolled, and patients were divided into2 groups: 81 patients did not undergo lymph node resection (group A), and 319 patientsunderwent lymph node dissection (group B). In group B, the median number of removednodes per patient was 25 (21 pelvic and 4 para-aortic nodes). In groups A and B, respectively,the 5-year progression-free survival (PFS) rates were 83.3% and 82.1% (p=0.305), and the5-year overall survival (OS) rates were 93.1% and 90.9% (p=0.645). The recurrence rate inthe retroperitoneal lymph nodes was not associated with lymph node dissection (p=0.121). The median operating time was markedly longer in group B than in group A (220 minutesvs. 155 minutes, p<0.001), and group B had a significantly higher incidence of lymph cysts atdischarge (32.9% vs. 0.0%, p<0.001). Conclusion: In patients with early-stage ovarian cancer, lymph node dissection was notassociated with a gain in OS or PFS and was associated with an increased incidence ofperioperative adverse events.

Use of High-performance Graphics Processing Units for Power System Demand Forecasting

He, Ting,Meng, Ke,Dong, Zhao-Yang,Oh, Yong-Taek,Xu, Yan The Korean Institute of Electrical Engineers 2010 Journal of Electrical Engineering & Technology Vol.5 No.3

Load forecasting has always been essential to the operation and planning of power systems in deregulated electricity markets. Various methods have been proposed for load forecasting, and the neural network is one of the most widely accepted and used techniques. However, to obtain more accurate results, more information is needed as input variables, resulting in huge computational costs in the learning process. In this paper, to reduce training time in multi-layer perceptron-based short-term load forecasting, a graphics processing unit (GPU)-based computing method is introduced. The proposed approach is tested using the Korea electricity market historical demand data set. Results show that GPU-based computing greatly reduces computational costs.

The COX-2 -765 G>C Polymorphism is Associated with Increased Risk of Gastric Carcinogenesis in the Chinese Hui Ethnic Population

He, Wen-Ting,Liu, Tao,Tang, Xiao-Fan,Li, Yu-Min Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.9

Background: The Chinese Hui ethnic group has diverse origins, including Arab, Persian, Central Asian, and Mongol. The standardized mortality rate of gastric cancer in the Hui population is higher than the overall Chinese population. In this study, we investigated whether COX-2-765G>C polymorphism, an extensively studied polymorphism, contributes to gastric cancer and its precursor lesions (GPL) in the Chinese Hui ethnic group. Materials and Methods: COX-2-765G>C polymorphism was determined by pyrosequencing in 100 gastric cancer cases, 102 gastric cancerand its precursor lesions cases and 105 controls. Data were statistically analyzed using Chi-square tests and logistic regression models. Results: Among the Chinese Hui ethnic group COX-2-765 C allele carriers were at increased risk for gastric cancer (OR=1.977, 95%CI=1.104-3.541). We also found an interaction between COX-2 -765 C carriers and Helicobacter pylori infection and eating pickled vegetables. Conclusions: Our findings suggest a multi-step process of gene-environment interaction contributes to gastric carcinogenesis.

Effects of Exogenous Hydrogen Sulfide on Apoptosis Proteins and Oxidative Stress in the Hippocampus of Rats Undergoing Heroin Withdrawal

Li-he Jiang,Xuan Luo,Wen ai He,Xiu-xiang Huang,Ting-ting Cheng 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.12

In this study, the mechanism of H_2S protection in the hippocampus of heroin-treated rats was investigated. Male Sprague-Dawley rats were randomly divided into three groups: a saline group, a heroin and saline group, and a heroin and sodium hydrosulfide group. According to the principle of increasing heroin dosage daily, heroin withdrawal was precipitated on day 9with an injection of naloxone (5 mg/kg, i.p.), and withdrawal symptoms were scored. The levels of cystathionine-β-synthase, H_2S, reduced glutathione and malondialdehyde, as well as the levels of cleaved caspase-3, Bax, and Bcl-2 proteins and the activities of superoxide dismutase, catalase, and glutathione peroxidase were assayed in the hippocampus. The results showed that exogenous H_2S alleviated heroin withdrawal symptoms. Moreover, exogenous H_2S not only increased cellular H_2S and the cystathionine-β-synthase protein level activity but also significantly improved heroin-induced oxidative stress. Protein expression of cleaved caspase-3 and Bax decreased, whereas Bcl-2 protein levels in hippocampus increased with exogenous H_2S. Exogenous H_2S alleviated heroin-induced rat hippocampal damage through antioxidant and antiapoptosis effects.

Strain Rate Effects on the Mechanical Properties of an AlCoCrFeNi High-Entropy Alloy

Chuan Ting Wang,Yong He,Zhiping Guo,Xiaohui Huang,Ying Chen,Houan Zhang,Yuan He 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7

The efect of strain rate on the compressive properties of an AlCoCrFeNi high-entropy alloy (HEA) was investigated. Microstructure of the AlCoCrFeNi HEA was observed using scanning transmission microscopy (SEM) and transmission electronmicroscopy. The results showed formation of a homogeneous two-phase structure. Quasi-static compression was testedunder initial engineering strain rates between 10–4 and 10–2 s−1. Engineering compression stress of exceeding 2500 MPaand ductility of around 12% was achieved. Dynamic mechanical behavior at room temperature was characterized by a splitHopkinson pressure bar under strain rates between 1350 and 4000 s−1. The AlCoCrFeNi HEA exhibited high strain ratesensitivity, especially under dynamic compression. The fuctuation of yield strength and the variation of strain rate hardening with strain rate was investigated. The various parameters of a constitutive equation for deformation of the AlCoCrFeNiHEA were obtained from the experimental data. The constitutive equations can be applied to predict the strength of alloyunder various stain rates.