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Endoscopic sphincterotomy plus large-balloon dilation vs endoscopic sphincterotomy for choledocholithiasis:A meta-analysis

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World Journal of Gastroenterology 2013年第48期19卷 9453-9460页

作者： Xiao-ming yang Bing Hu Department of Endoscopy Eastern Hepatobiliary Surgery Hospital Second Military Medical University

AIM:To perform a meta-analysis of large-balloon dilation(LBD)plus endoscopic sphincterotomy(EST)vs EST alone for removal of bile duct ***:Databases including PubMed,EMBASE,the Cochrane Library,the Science Citation Index,and important meeting abstracts were searched and evaluated by two reviewers *** main outcome measures included:complete stone removal,stone removal in the first session,use of mechanical lithotripsy,procedure time,and procedure-related complications.A fixed-effects model weighted by the Mantel-Haenszel method was used for pooling the odds ratio(OR)when heterogeneity was not significant among the *** a Q test or I2statistic indicated substantial heterogeneity,a random-effects model weighted by the DerSimonian-Laird method was ***:Six randomized controlled trials involving835 patients were *** was no significant heterogeneity for most results;we analyzed these using a fixed-effects ***-analysis showed EST plus LBD caused fewer overall complications than EST alone(OR=0.53,95%CI:0.33-0.85,P=0.008);sub-category analysis indicated a significantly lower risk of perforation in the EST plus LBD group(Peto OR=0.14,95%CI:0.20-0.98,P=0.05).Use of mechanical lithotripsy in the EST plus LBD group decreased significantly(OR=0.26,95%CI:0.08-0.82,P=0.02),especially in patients with a stone size larger than 15 mm(OR=0.15,95%CI:0.03-0.68,P=0.01).There were no significant differences between the two groups regarding complete stone removal,stone removal in the first session,post-endoscopic retrograde cholangiopancreatography pancreatitis,bleeding,infection of biliary tract,and procedure ***:EST plus LBD is an effective approach for the removal of large bile duct stones,causing fewer complications than EST alone.

关键词： Balloon dilation Cholangiopancreatography Endoscopic retrograde Choledocholithiasis Endoscopic sphincterotomy Meta-analysis

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Wnt/β-catenin signaling pathway is active in pancreatic development of rat embryo

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World Journal of Gastroenterology 2006年第16期12卷 2615-2619页

作者： Qi-ming Wang Ye Zhang Kai-ming yang Hong-Ying Zhou Hui-Jun yang Department of Anatomy School of Preclinical and Forensic Medicine Sichuan University Chengdu 610041 China Beida Weixin Biology and Science Company Beijing 100081 China

AIM： To elucidate the role of Wnt/β-catenin signaling pathway in pancreatic development of rat embryo. METHODS： The mRNAs of β-catenin, APC, cyclin D1 genes were amplified by means of semiquantitative reverse transcription polymerase chain reaction （RTPCR） from embryonic pancreas in different periods and normal pancreas of rat, respectively. Protein expression of these genes in embryonic pancreas of E14.5-E18.5 was examined by immunohistochemical method. RESULTS： In embryonic pancreas of E14.5, the transcript amplification of β-catenin and cyclinD1 genes was detected. In embryonic pancreas of E18.5, the transcription levels of β-catenin and cyclinD1 genes became much higher than in other periods. But in adult rat pancreas the transcription of cyclinD1 gene could not be observed. Only until E18.5, the transcript amplification of mRNA of APC gene could be detected. Surprisingly, the transcription level of APC gene became much higher in adult rat pancreas than in embryonic pancreas. By means of immunohistochemical staining, identical results were obtained to the above by RP-PCR, except for β-catenin protein in adult rat pancreas. CONCLUSION： Active Wnt/β-catenin signaling occurs in rat embryonic pancreas and is probably important for pancreatic development and organ formation.

关键词： Wnt/β-catenin signaling Pancreas Development Embryo

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Annealing-induced gradient nanostructured FeCrAlTiMo high-entropy alloy coatings with significantly enhanced wear resistance

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Tungsten 2024年第3期6卷 544-548页

作者： Jian yang ming-yang Zhou Ji-Jun yang Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

Recently,the amorphous high-entropy alloy(HEA)coatings exhibit an impressive resistance to the lead–bismuth eutectic(LBE)corrosion and ion irradiation,showing great application potential for lead-cooled fast reactors... 详细信息

关键词： alloy resistance wear

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Multicopy quantum state discrimination

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 60-65页

作者： ZHANG WenHai YU LongBao yang ming ZhuoLiang Department of Physics Huainan Normal University Huainan 232038 China Department of Physics and Electronic Engineering Hefei Teachers College Hefei 230061 China School of Physics and Material Science Anhui University Hefei 230039 China

In this paper, we study the problem of multicopy quantum two-state discrimination. By exploring the quantum hypothesis testing, i.e., the probabilisfic quantum cloning, we derive the upper bounds of the minimal error discrimination （MED） and the optimal unambiguous discrimination （OUD）, which coincides with the Helstrom theorem and the JS limit. Furthermore, when prior probabilities are unknown, we derive the minimax MED and the minimax OUD. Based on the optimal NM probabilistic quantum cloning, we present the optimal strategies of collective measurements of the MED and the OUD. When the number of the copies is infinite, regardless of whether prior probabilities are known or not, the success probabilities of the MED and the OUD go to 100%, in accordance with the quantum measurement hypothesis that unknown quantum state can be determined if and only if infinite identical quantum state copies are given.

关键词： quantum state discrimination Helstrom theorem JS limit minimal error discrimination (MED) optimal unambiguousdiscrimination (OUD)

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EcR/USP-1-mediated ecdysteroid signaling regulates wolf spider(Pardosa pseudoannulata) development and reproduction

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Zoological Research 2023年第1期44卷 43-52页

作者： Zhi-ming yang yang-yang Yan Yong Wu Na Yu Ze-Wen Liu Key Laboratory of Integrated Management of Crop Diseases and Pests(Ministry of Education) College of Plant ProtectionNanjing Agricultural UniversityNanjingJiangsu 210095China

Lycosidae females demonstrate meticulous maternal care of offspring by carrying egg sacs and juvenile spiderlings during the reproductive stage. Nuclear receptors(NRs), especially the ecdysone receptor(EcR) and ultraspiracle(USP), have attracted considerable attention in the regulation of arthropod development and reproduction due to their pivotal roles in ecdysteroid signaling cascades. In the present study, 23 NRs, including one EcR and two USPs, were identified in the genome of the predatory wolf spider Pardosa pseudoannulata. RNA interference(RNAi) targeting EcR and USP-1inhibited spiderling development and resulted in nonviable eggs in the egg sacs. EcR and USP-1responded to changes in ecdysteroid levels, and interference in ecdysteroid biosynthesis led to similar phenotypes as ds EcR and ds USP-1 *** findings suggest that EcR/USP-1-mediated ecdysteroid signaling regulates P. pseudoannulata development and reproduction. The *** females with suppressed ecdysteroid signaling proactively consumed their non-viable egg sacs, resulting in a 7.19 d shorter first reproductive cycle than the controls. Termination of the failed reproductive cycle enabled the spiders to produce a new egg sac more rapidly. This reproductive strategy may partially rescue the reduction in population growth due to non-viable eggs and compensate for the physiological expenditure of wasted maternal care, which would be beneficial for the conservation of *** populations and their natural control of insect pests.

关键词： Pardosa pseudoannulata Ecdysone receptor Ultraspiracle Development Reproduction

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Protection of PC12 Cells against Superoxide-induced Damage by Isoflavonoids from Astragalus mongholicus

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Biomedical and Environmental Sciences 2009年第1期22卷 50-54页

作者： DE-HONG YU YONG-ming BAO LI-JIA AN ming yang The State Key Laboratory of Natural and Biomimetic Drugs Peking University Beijing 100083 China Department of Bioscience and Biotechnology Dalian University of Technology Dalian 116024 Liaoning China

Objective To further investigate the neuroprotective effects of five isoflavonoids from Astragalus mongholicus on xanthine （XA）/xanthine oxidase （XO）-induced injury to PC12 cells. Methods PC12 cells were damaged by XA/XO. The activities of antioxidant enzymes, MTT, LDH, and GSH assays were used to evaluate the protection of these five isofavonoids. Contents of Bcl-2 family proteins were determined with flow cytometry. Results Among the five isoflavonoids including formononetin, ononin, 9, 10-dimethoxypterocarpan-3-O-β-D-glucoside, calycosin and calycosin-7-O-glucoside, calycosin and calycosin-7-O-glucoside were found to inhibit XA/XO-induced injury to PC12 cells. Their ECs0values of formononetin and calycosin were 0.05 μg/mL. Moreover, treatment with these three isoflavonoids prevented a decrease in the activities of antioxidant enzymes, superoxide dismutase （SOD） and glutathione peroxidase （GSH-Px）, while formononetin and calycosin could prevent a significant deletion of GSH. In addition, only calycosin and calycosin-7-O-glucoside were shown to inhibit XO activity in cell-free system, with an approximate IC50 value of 10 μg/mL and 50 μg/mL. Formononetin and calycosin had no significant infuence on Bcl-2 or Bax protein contents. Conclusion Neuroprotection of formononetin, calycosin and calycosin-7-O-glucoside may be mediated by increasing endogenous antioxidants, rather by inhibiting XO activities or by scavenging free radicals.

关键词： Astragalus mongholicus Neuroprotection Xanthine/xanthine oxidase PC12 cells

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Rate estimate for regular LDPCA codec in distributed video coding

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The Journal of China Universities of Posts and Telecommunications 2012年第1期19卷 50-54页

作者： ming yang-yang yang Bo QUAN Zi-Yi MEN Ai-dong School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

Accumulated low density parity check （LDPCA） codec is proposed for DISCOVER project in distributed video coding （DVC）, which offers flexible coding rate. Although it can use feedback channel to adapt the rate to the correlation of the video, but in real applications, using feedback channel can not always be possible. To solve this problem, some researchers proposed estimating the code rate at the encoder but the performance was not very good. Based on their researches, this paper considers the impact of convergence rate for iteration on rate estimate, which can be calculated using its check matrix. As a pilot study, this paper pays attention to the regular LDPCA codec. At the same time, it considers the impact of deviation in the estimated crossover probability, which gives some constraints to rate estimate. In the experiment, the proposed algorithm can improve the rate-distortion performance by up to 1 dB-1.2 dB.

关键词： LDPCA distributed video coding rate estimate regular LDPCA codec crossover probability deviation

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An Improved Hybrid Collaborative Filtering Algorithm Based on Tags and Time Factor

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Big Data Mining and Analytics 2018年第2期1卷 128-136页

作者： Chunxia Zhang ming yang Jing Lv Wanqi yang the School of Computer Science and Technology Nanjing Normal University

The Collaborative Filtering(CF) recommendation algorithm, one of the most popular algorithms in Recommendation Systems(RS), mainly includes memory-based and model-based methods. When performing rating prediction using a memory-based method, the approach used to measure the similarity between users or items can significantly influence the recommendation performance. Traditional CFs suffer from data sparsity when making recommendations based on a rating matrix, and cannot effectively capture changes in user interest. In this paper, we propose an improved hybrid collaborative filtering algorithm based on tags and a time factor(TTHybridCF), which fully utilizes tag information that characterizes users and items. This algorithm utilizes both tag and rating information to calculate the similarity between users or items. In addition, we introduce a time weighting factor to measure user interest, which changes over time. Our experimental results show that our method alleviates the sparsity problem and demonstrates promising prediction accuracy.

关键词： recommendation system similarity tag time factor

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On the energy conservation and critical velocities for the propagation of a "steady-shock" wave in a bar made of cellular material

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Acta Mechanica Sinica 2013年第3期29卷 420-428页

作者： Li-Li Wang Li-ming yang Yuan-Yuan Ding Mechanics and Material Science Research Center Ningbo University

The propagation of shock waves in a cellular bar is systematically studied in the framework of continuum solids by adopting two idealized material models, viz. the dynamic rigid, perfectly plastic, locking （D-R-PP-L） model and the dynamic rigid, linear hardening plastic, locking （D-R-LHP-L） model, both considering the effects of strain-rate on the material properties. The shock wave speed relevant to these two models is derived. Consider the case of a bar made of one of such material with initial length L 0 and initial velocity v i impinging onto a rigid target. The variations of the stress, strain, particle velocity, specific internal energy across the shock wave and the cease distance of shock wave are all determined analytically. In particular the ＂energy conservation condition＂ and the ＂kinematic existence condition＂ as proposed by Tan et al. （2005） is re-examined, showing that the ＂energy conservation condition＂ and the consequent ＂critical velocity＂, i.e. the shock can only be generated and sustained in R-PP-L bars when the impact velocity is above this critical velocity, is incorrect. Instead, with elastic deformation, strain-hardening and strain-rate sensitivity of the cellular materials being considered, it is appropriate to redefine a first and a second critical impact velocity for the existence and propagation of shock waves in cellular solids. Starting from the basic relations for shock wave propagating in D-R-LHP-L cellular materials, a new method for inversely determining the dynamic stress-strain curve for cellular materials is proposed. By using e.g. a combination of Taylor bar and Hopkinson pressure bar impact experimental technique, the dynamic stress-strain curve of aluminum foam could bedetermined. Finally, it is demonstrated that this new formulation of shock theory in this one-dimensional stress state can be generalized to shocks in a one-dimensional strain state, i.e. for the case of plate impact on cellular materials, by simply making proper

关键词： Cellular solids 1D shock theory D-R-PP-L model D-R-SHP-L model Energy conservation across shock Critical velocities

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Compressed Data Separation via ℓ_(q)-Split Analysis with ℓ_(∞)-Constraint

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1655-1673页

作者： ming yang Gu Song Li Jun Hong Lin School of Mathematical Science Zhejiang UniversityHangzhou310027P.R.China Center for Data Science Zhejiang UniversityHangzhou310027P.R.China

In this paper,we study compressed data separation(CDS)problem,i.e.,sparse data separation from a few linear random *** propose the nonconvex ℓ_(q)-split analysis with ℓ_(∞)-constraint and 0 详细信息

In this paper,we study compressed data separation(CDS)problem,i.e.,sparse data separation from a few linear random *** propose the nonconvex ℓ_(q)-split analysis with ℓ_(∞)-constraint and 0

关键词： Data separation ℓ_(q)-split analysis Dantzig selector frames restricted isometry property compressed sensing

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