Systematic Review of Single Large and/or Multinodular Hepatocellular Carcinoma: Surgical Resection Improves Survival

Yang, Xiang-Di,Pan, Ling-Hui,Wang, Lin,Ke, Yang,Cao, Ji,Yang, Chun,Zhong, Jian-Hong,Luo, Wang,Guo, Jiao,Li, Le-Qun Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.13

Background: The role of surgical resection for patients with single large (${\geq}5cm$) and/or multinodular (${\geq}2$) hepatocellular carcinoma (HCC) is still controversial. This systematic review was performed to evaluate the safety and efficacy of resection for patients with single large and/or multinodular HCC. Materials and Methods: Databases (the PubMed, Web of Science, Embase, and Cochrane databases) were systematically searched to identify relevant studies exploring the safety and efficacy of resection for single large and/or multinodular HCC, published between January 2000 and December 2014. Perioperative morbidity and mortality, overall survival, and disease-free survival of the resection group were calculated. In addition, these outcome variables were also calculated for the control group in the included studies. Results: One randomized controlled trial and 42 nonrandomized studies involving 9,580 patients were eligible for analysis. Eight (1,594 patients) of the 43 studies also reported the outcomes of transarterial chemoembolization (TACE). Although 51.4% of patients featured cirrhosis, 90.7% of them demonstrated Child-Pugh A liver function in the resection group. The median rates of morbidity (24.5%) and mortality (2.5%) after resection were significantly higher than that of TACE (11.0%, P<0.001; 1.9%, P<0.001). However, patients who underwent resection had significantly higher median one-, three-, and five-year overall survival (76.1%, 51.7%, and 37.4%) than those who underwent TACE (68.3%, 31.5%, and 17.5%, all P<0.001). The median 1-, 3-, and 5-year DFS rates after resection were 58.3%, 34.6%, and 24.0%, respectively. Conclusions: Although tumor recurrence after resection for patients with single large and/ or multinodular HCC continues to be a major problem, resection should be considered as a strategy to achieve long-term survival.

An Enhanced Grouping Proof for Multiple RFID Readers and Tag Groups

Jian Shen,Haowen Tan,Yang Wang,Sai Ji,Jin Wang 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12

RFID authentication on large numbers of tags or tag groups has attracted many researchers’ attention as an extension of initial one-or-two-tags scenarios. Due to demands of RFID application in supply chain, various proofs are proposed in the purpose of solving existing problems of grouping tags identification. However, it is proved that verifiers in these proofs are not aware of abnormal relating devices instantly, which may cause both security and technical risks and lie heavy upon identification of the problematic tags and readers. In this paper, we propose an enhanced grouping proof for multiple RFID readers and tag groups, according to which the verifier is able to cope with multiple readers and tag groups simultaneously and know the detailed status of the problematic tags. In addition, privacy protection is provided by offering mutual authentication between the readers and tags. Moreover, it is hard for the malicious tags to pass the verification in the proposed proof.

A Continuous Abnormal Speech Detection Method Based on Time Domain features Weighted

He Jun,Ji-chen Yang,Qing-hua Zhang,Guo-xi Sun,Jian-bing Xiong 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.12

In this brief, a novel pathological continuous speech detection method based on time domain features weighted. First, different optimal threshold for time domain features, including zero crossing ratio, short-time energy and autocorrelation, are obtained from training speech data. Second, a difference evaluation technique is proposed, and with it, the difference of the same time domain feature selected from testing speech data and training speech data were obtained. Finally, to distinguish a given speech well, a novel weighting method based on difference evaluation for each kinds of time domain is employed, respectively. Experiments were conducted on the pathological speech database to prove the power and effectiveness of the proposed method. Results obtained shown that this method outperforms other early proposed time domain feature method, creating a more reliable technique for pathological continuous speech detection.

Extrusion of porous silicon nitride using different binders

Jian-Feng Yang,Guang-Peng Jiang,Ji-Qiang Gao 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.1

Porous silicon nitride ceramics were prepared using an extrusion process. Starch and thermoset phenol-formaldehyde resin were used as binders. The effect of the different binders on the microstructure and mechanical strength of the porous silicon nitride were investigated in detail. It is shown that the microstructure was more uniform when phenol-formaldehyde resin was used as the binder. In contrast, the pore size distribution was bimodal when starch was used. Furthermore, the flexural strength of porous Si3N4 using resin as the binder was higher than that using the starch.

Improved Global Maximum Power Point Tracking for Photovoltaic System via Cuckoo Search under Partial Shaded Conditions

Ji-Ying Shi,Fei Xue,Zi-Jian Qin,Wen Zhang,Le-Tao Ling,Ting Yang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.1

Conventional maximum power point tracking (MPPT) methods are ineffective under partially shaded conditions because multiple local maximum can be exhibited on power–voltage characteristic curve. This study proposes an improved cuckoo search (ICS) MPPT method after investigating the cuckoo search (CS) algorithm applied in solving multiple MPPT. The algorithm eliminates the random step in the original CS algorithm, and the conception of low-power, high-power, normal and marked zones are introduced. The adaptive step adjustment is also realized according to the different stages of the nest position. This algorithm adopts the large step in low-power and marked zones to reduce search time, and a small step in high-power zone is used to improve search accuracy. Finally, simulation and experiment results indicate that the promoted ICS algorithm can immediately and accurately track the global maximum under partially shaded conditions, and the array output efficiency can be improved.

Combining Model-based and Heuristic Techniques for Fast Tracking the Global Maximum Power Point of a Photovoltaic String

Ji-Ying Shi,Fei Xue,Le-Tao Ling,Xiao-Fei Li,Zi-Jian Qin,Ya-Jing Li,Ting Yang 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.2

Under partial shading conditions (PSCs), multiple maximums may be exhibited on the P-U curve of string inverter photovoltaic (PV) systems. Under such conditions, heuristic methods are invalid for extracting a global maximum power point (GMPP); intelligent algorithms are time-consuming; and model-based methods are complex and costly. To overcome these shortcomings, a novel hybrid MPPT (MPF-IP&O) based on a model-based peak forecasting (MPF) method and an improved perturbation and observation (IP&O) method is proposed. The MPF considers the influence of temperature and does not require solar radiation measurements. In addition, it can forecast all of the peak values of the PV string without complex computation under PSCs, and it can determine the candidate GMPP after a comparison. Hence, the MPF narrows the searching range tremendously and accelerates the convergence to the GMPP. Additionally, the IP&O with a successive approximation strategy searches for the real GMPP in the neighborhood of the candidate one, which can significantly enhance the tracking efficiency. Finally, simulation and experiment results show that the proposed method has a higher tracking speed and accuracy than the perturbation and observation (P&O) and particle swarm optimization (PSO) methods under PSCs.

Dual-Algorithm Maximum Power Point Tracking Control Method for Photovoltaic Systems based on Grey Wolf Optimization and Golden-Section Optimization

Ji-Ying Shi,Deng-Yu Zhang,Le-Tao Ling,Fei Xue,Ya-Jing Li,Zi-Jian Qin,Ting Yang 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.3

This paper presents a dual-algorithm search method (GWO-GSO) combining grey wolf optimization (GWO) and golden-section optimization (GSO) to realize maximum power point tracking (MPPT) for photovoltaic (PV) systems. First, a modified grey wolf optimization (MGWO) is activated for the global search. In conventional GWO, wolf leaders possess the same impact on decision-making. In this paper, the decision weights of wolf leaders are automatically adjusted with hunting progression, which is conducive to accelerating hunting. At the later stage, the algorithm is switched to GSO for the local search, which play a critical role in avoiding unnecessary search and reducing the tracking time. Additionally, a novel restart judgment based on the quasi-slope of the power-voltage curve is introduced to enhance the reliability of MPPT systems. Simulation and experiment results demonstrate that the proposed algorithm can track the global maximum power point (MPP) swiftly and reliably with higher accuracy under various conditions.

Mutations in AP22.65 Accelerate Flowering in Arabidopsis thaliana

Ji Hong Xing,Feng Ru Wang,Jiao Jia,Jing Zhang,Li Li,Zhan Chen,Qiao Yun Weng,Ping Yang,Ye Zhang,Bin Zhao,He Long Si,Jin Gao Dong,Jian Min Han 한국식물학회 2013 Journal of Plant Biology Vol.56 No.1

Identification of the gene(s) responsible for floweringtime in Arabidopsis has significant implications. We used theT-DNA insertion library of Arabidopsis thaliana to screen anearly-flowering mutant that exhibits accelerated floweringunder short-day conditions. AP22.65, a novel flowering-timegene in that species, was isolated and identified via genomewalkingand bioinformatics analysis. The flowering time ofAP22.65-complementing plants was similar to that of theCol-0 wild type (WT). Conversely, its overexpression delayedflowering. Consistent with this phenotype, expression ofAP22.65 was decreased in the ap22.65-1 mutant, recoveredin AP22.65-complementing plants, and increased in AP22.65-overexpressing plants. Compared with the WT, expressionlevels of critical genes in different flowering pathways, i.e.,SPY, FLC, GI, CO, FT, and LFY, were down-regulated inloss-of-function mutants. Expression of AP22.65 was distributedin flowers, siliques, rosette leaves, and whole seedlings. Therefore, this gene may be a negative regulator of Arabidopsisflowering.

A Study on method of designing developable surface

Ji-xin YANG,Zhe LIU,Jian LIU 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-

The paper deals with the principle of envelope of a one-parameter plane family to design developable surface. Three methods of designing developable surface are presented. They are designing a developable surface based on one curve on it and its normal line, designing a developable surface based on two curves on it and designing a developable surface based on one curve and one surface. They meet the requirements of engineering fields.

Removal of phenanthrene from soil by additive-enhanced electrokinetics

Ji-Yeon Park,Yan Chen,Jian Chen,Ji-Won Yang 한국지질과학협의회 2002 Geosciences Journal Vol.6 No.1

Removal of hydrophobic organic contaminants(HOCs) using an additive-enhanced electrokinetic method wasstudied in a model system. Kaolinite and phenanthrene wereselected as a model clay soil and a representative HOC, respec-tively. Three different chemically-synthesized surfactants alongwith two diferent biosurfactants were used to remove phenan-threne. Hydrogen peroxide was also used to degrade phenan-threne. Electrokinetic (EK) column experiments were performedusing these additives. When no additive was used, a removal effi-ciency of phenanthrene was 4.23% after 2 weks. When surfac-tants were added in the EK system, the removal efficiencies after2 weeks were as follows: APG 11.1%, Brij30 6.31%, SDS 9.97%,MEL 16.2% and BS-UC 17.4%. Among surfactants, biosurfac-tants had higher removal efficiencies than chemically-synthesizedsurfactants. When hydrogen peroxide was used, 54.7% of initialamount was removed at a current of 5 mA for 2 weeks. Even ahigher removal efficiency was achieved (84.2%) at 10 mA within1 week. These results suggest a detailed future study on the chem-ical treatment by hydrogen peroxide incorporated with EK methodto remove phenanthrene from clay soil.