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Risk Models for the Prize Collecting Steiner Tree Problems with Interval Data

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Acta Mathematicae Applicatae Sinica 2014年第1期30卷 1-26页

作者： Eduardo lvarez-Miranda Alfredo Candia-Vjar xu-jin chen Xiao-dong HU Bi LI Industrial Management Department Universidad de TalcaChile DEI University of BolognaItaly Academy of Mathematics and Systems Science CAS

Given a connected graph G=（V,E）with a nonnegative cost on each edge in E,a nonnegative prize at each vertex in V,and a target set V′V,the Prize Collecting Steiner Tree（PCST）problem is to find a tree T in G interconnecting all vertices of V′such that the total cost on edges in T minus the total prize at vertices in T is *** PCST problem appears frequently in practice of operations *** the problem is NP-hard in general,it is polynomial-time solvable when graphs G are restricted to series-parallel *** this paper,we study the PCST problem with interval costs and prizes,where edge e could be included in T by paying cost xe∈[c e,c＋e]while taking risk（c＋e xe）/（c＋e c e）of malfunction at e,and vertex v could be asked for giving a prize yv∈[p v,p＋v]for its inclusion in T while taking risk（yv p v）/（p＋v p v）of refusal by *** establish two risk models for the PCST problem with interval *** given budget upper bound on constructing tree T,one model aims at minimizing the maximum risk over edges and vertices in T and the other aims at minimizing the sum of risks over edges and vertices in *** propose strongly polynomial-time algorithms solving these problems on series-parallel graphs to *** study shows that the risk models proposed have advantages over the existing robust optimization model,which often yields NP-hard problems even if the original optimization problems are polynomial-time solvable.

关键词： uncertainty modeling prize collecting Steiner tree interval data series-parallel graphs polynomial-time solvability

Research on terahertz time-domain spectroscopy methodology of liquid samples

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Science China(Technological Sciences) 2010年第4期53卷 1012-1015页

作者： ZHOU Lei,xu WeiWei,jin BiaoBing,chen Jian,KANG Lin & WU PeiHeng Research Institute of Superconductor Electronics(RISE),Nanjing University,Nanjing 210093,China 1. Research Institute of Superconductor Electronics (RISE) Nanjing University Nanjing 210093 China

Terahertz(THz) time-domain spectroscopy(TDS) has been applied to investigate liquid's optical property in recent ***,comprehensive discussion of how to compute liquids' complex refractive indices and absorption rates ... 详细信息

关键词： terahertz(THz) time-domain spectroscopy(TDS) liquid

Distribution of Rice Grains on Panicle Axis and Its Relationship with Seed-Setting Ability in Liaoning, China

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Agricultural Sciences in China 2006年第3期5卷 202-208页

作者： xu Zheng-jin chen Wen-fu SHUN Zhan-hui ZHANG Shu-lin LIU Li-xia ZHOU Shu-qing Key Laboratory of Crop Physiology Ecology Genetics and Breeding Ministry of Agriculture/Key Laboratory of Northern Japonica Rice Breeding of Liaoning Province/Rice Institute Shenyang Agricultural University Shenyang 110161 P.R.China

Studies were conducted with rice varieties developed in recent years in Liaoning Province of China as test materials. Results showed that the varieties tested could be divided into three types：（1） the high-yielding （HYV）, （2） the mediumyielding （MYV）, and （3） the low-yielding （LYV）. The panicle population was in the order of HYV〈 MYV 〈 LYV, while the grain number per panicle and seed-setting rate were just opposite. There was no significant difference in the 1 000-grain weight. Biomass was higher in HYV than in MYV and LYV, while the harvest index was higher in HYV and MYV than in LYV. Yield was inversely correlated with panicle population, but positively correlated with the grain number per panicle, seed-setting rate, the number of primary and secondary branch grains, seed density and harvest index. Yield was most closely linked with the grain number per panicle which was determined chiefly by the number of secondary branch grains and to a lesser degree by seed density and the number of primary branch grains. The seed-setting rate of the secondary branches was positively correlated with that of the whole panicle and yield. The peak value of primary branches for HYV, MYV and LYV was 12-14, 10-13 and 8-12, respectively. LYV had fewer secondary branch grains, while MYV and HYV had more. Such grains distributed mainly in the middle and lower parts of panicle axis for LYV and in the middle and upper parts for MYV and HYV.

关键词： rice grain distribution primary branch secondary branch seed-setting ability

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Firm in Spirit

Women of China 1997年第5期 17-18页

作者： xu FENGQIN and jin FENGLIAN chen SHANSHAN

IN July of 1992, Henan Province was ravaged by floods. A farmer from Xidianzi Township, Suizhong County, Liaoning Province, sent 100 yuan there, the money she had just earned by selling peaches on the market.

关键词： Firm in Spirit

Genetical and Physiological Basis of Plant Type Model of Erect and Large Panicle Japonica Super Rice in Northern China

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Agricultural Sciences in China 2010年第4期9卷 457-462页

作者： xu Zheng-jin, chen Wen-fu, HUANG Rui-dong, ZHANG Wen-zhong, MA Dian-rong, WANG Jia-yu, xu Hai and ZHAO Ming-hui Key Lab of Northern Japonica Rice Breeding of Liaoning Province, Shenyang Agricultural University, Shenyang 110161, P.R.China [a] Key Lab of Northern Japonica Rice Breeding of Liaoning Province Shenyang Agricultural University Shenyang 110161 P.R. China

The historical changes in rice yields across China were explored. The physiological mechanisms and genetic basis of the erect and large panicle super-high-yield plant type model for breeding japonica super rice were analyzed mainly on the panicle type, number of large vascular bundles （LVB） in the panicle neck, and the panicle type index （PTI）. In the production point of view, we suggested that, for the breeding of super-high-yield japonica rice, the erect panicle types with more LVB numbers in the panicle neck and superior upper grains in the secondary branches would be the key factors. The information has potential significance in the rice breeding and productivity not only in China but also throughout the rice production areas of the world.

关键词： super rice plant type panicle type erect panicle

Irinotecan-involved regimens for advanced gastric cancer:A pooled-analysis of clinical trials

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World Journal of Gastroenterology 2010年第46期16卷 5889-5894页

作者： Dan-Ling Wang,Dong-Ying Gu,Hua-Ying Huang,Zhi xu,jin-Fei chen,Department of Oncology,Affiliated Nanjing First Hospital,Nanjing Medical University,68 Changle Road and Medical School of Southeast University,87 Dingjiaqiao,Nanjing 210000,China Department of Oncology Affiliated Nanjing First Hospital Nanjing Medical University 68 Changle Road Nanjing 210006 China. jinfeichen@***

AIM:To assess the efficiency and toxicities of irinotecan (CPT-11)-involved regimens in patients with advanced gastric ***:Randomized phases Ⅱ and Ⅲ clinical trials on chemotherapy for advanced gastric cancer were searched from MEDLINE,EMbase,Cochrane Controlled Trials Register,and *** abstracts were manually searched.A total of 657 patients were analyzed for their overall response rate (ORR),time to treatment failure (TTF),overall survival (OS) rate,and *** survival rate,reported as hazard ratio (HR) with 95% CI,was used as the primary outcome ***:Four randomized controlled trials on chemotherapy for advanced gastric cancer were *** CPT-11-containing combination chemotherapy was not significantly advantageous over the non CPT-11containing combination chemotherapy for OS rate (HR =1.12,95% CI:0.92-1.36,P=0.266) and ORR [risk ratio (RR)=1.23,95% CI:0.71-2.14,P=0.458].However,the CPT-11-containing combination chemotherapy was significantly advantageous over the non CPT-11-containing combination chemotherapy for TTF (HR=1.35,95% CI:1.12-1.64,P=0.002).Grade 3/4 haematological toxicity (thrombocytopenia:RR=0.20,95% CI:0.09-0.48;P < 0.001) and gastrointestinal toxicity (diarrhea:RR=4.09,95% CI:2.42-6.93,P < 0.001) were lower in patients with advanced gastric cancer after CPT11-containing combination chemotherapy than after non CPT-11-containing combination ***:CPT-11-containing combination chemotherapy is advantageous over non CPT-11-containing combination chemotherapy for TTF with no significant ***-11-containing combination chemotherapy can be used in treatment of advanced gastric cancer.

关键词： Meta-analysis Advanced gastric cancer Chemotherapy

Analysis of Micromechanical Properties at the Interface of Pre-wet SBS Modified Asphalt Mixture Based on Molecular Simulation Technology

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 103-113页

作者： chen Wuxing chen Shuang YU Yan ZHANG Jiangyi xu Haiyang GUO Wei School of Mines China University of Mining and TechnologyXuzhou 221000China College of Construction Engineering Jilin Uni-versityChangchun 130026China

The pre-wetting of aggregate surface is a means to improve the interface performance of SBS modified asphalt and *** effect of pre-wetting technology on the interaction between SBS modified asphalt and aggregate was analyzed by molecular dynamics *** diffusion coefficient and concentration distribution of SBS modified asphalt on aggregate surface are *** simulation results show that the diffusion coefficient of the aggregate surface of SBS modified asphalt is increased by 47.6%and 70.5%respectively after 110#asphalt and 130#asphalt are *** concentration distribution of SBS modified asphalt on the aggregate surface after pre-wetting is more *** to the results of interface energy calculation,the interface energy of SBS modified bitumen and aggregate can be increased by about 5%after *** to the results of molecular dynamics simulation,the pre-wetting technology can effectively improve the interface workability of SBS modified bitumen and aggregate,so as to improve the interface performance.

关键词： pre-wet oil-stone interface interface interaction interface mechanics molecular dynamics simulation

Comparison of drug eluting stents with bare metal stents in daily practice for bifurcation lesions in Chinese patients

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Chinese Medical Journal 2006年第14期119卷 1157-1164页

作者： KANG Sheng YANG Yue-jin xu Bo chen Ji-lin QIAO Shu-bin YAO Min chen Jue WU Yong-jian LIU Hai-bo DAI Jun YUAN jin-qing LI Jian-jun GAO Run-lin Department of Cardiology Cardiovascular Institute ＆ Fuwai Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100037 China

Background Recently, numerous randomized and controlled trials have demonstrated great advantages of drug eluting stents （DES） with respect to significant reduction of restenosis and recurrence of symptoms and improvement of clinical outcomes after percutaneous coronary intervention （PCI）. Little is known about the comparative effects between DES and bare metal stents （BMS） for bifurcation angioplasty in the Chinese population. We compared the inpatient and 7-month follow-up outcomes between DES and BMS for the treatment of bifurcation lesions. Methods From April 2004 to October 2005, 291 Chinese patients [85.9% male, mean age （57.8± 10.4） years] underwent DES （387 lesions） and/or BMS （297 lesions） implantation for bifurcation lesions. Clinical and angiographic follow-up was performed at 7 months. Results Compared with BMS group, patients in DES group had significantly lower rates of restenosis at main branch （9.5% vs 28.7%, P 〈 0.001） or side branch （14.5% vs 37.0%, P 〈 0.001） and major adverse cardiac events （MACE）（14.0% vs 26.3%, P = 0.000）. The occurrence rate of late in-stent thrombosis did not differ between the two groups in both main （0.8% vs 0, P = 0.224） and side branches （1.4% vs 0, P =0.198）. Target lesion revascularization （TLR） was less frequent in DES group for main branch （8.3% vs 21.3%, P 〈 0.001） and for side branch （7.6% vs 23.5%, P 〈 0.001）. Multivariate regression analysis revealed that total stent length （OR = 1.029, P = 0.01）, postprocedural in-stent minimum lumen diameter （OR = 0.476, P = 0.03） and stent type （OR = 3.988, P = 0.0001） were independent predictors of TLR for main branch. Prior history of coronary intervention （OR = 2.424, P =0.041）, angulated lesion （OR = 2.337, P = 0.033）, postdilation （OR = 0.267, P = 0.035） and stent type （DES vs BMS, OR = 5.459, P = 0.000） were independent predictors of TLR for side branch. Conclusion The implantation of DES may be associated with greater reduction of restenosis and TLR than BMS in bi

关键词： percutaneous coronary intervention drug eluting stent bare metal stent bifurcation

Mutual-structure weighted guided image filtering for depth map restoration

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Optoelectronics Letters 2025年第1期21卷 51-56页

作者： LIU Zijian SONG Jian chen Quanmin xu Jiangtao Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology School of Microelectronics Tianjin University Spikesee Technology Co. Ltd.

Although guided image filtering(GIF) is known for preserving edges and fast computation, it may produce inaccurate outputs in depth map restoration. In this paper, a novel confidence-weighted GIF called mutual-structure weighted GIF(MSWGIF) is proposed, which replaces the mean filtering strategy in GIF during handling overlapping windows. The confidence value is composed of a depth term and a mutual-structure term, where the depth term is utilized to protect the edges of the output, and the mutual-structure term helps to select accurate windows during the structure characteristics of the guidance image are transferred to the output. Experimental results show that MSWGIF reduces the root mean square error(RMSE) by an average of 12.37%, and the average growth rate of correlation(CORR) is 0.07% on average. Additionally, the average growth rate of structure similarity index measure(SSIM) is 0.34%.

关键词： Wiener filtering