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An integrated MINLP model for multi-party coordination in downstream oil supply chain

Petroleum Science 2024年第3期21卷 2066-2079页

作者： Rui Qiu Bo Zhang Wei Zhao ren-Fu tu Man-Qiu He Qi Liao Yong-tu Liang National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology China University of Petroleum-BeijingFuxue Road No.18Changping DistrictBeijing102249PR China Strategy&Implementation Department PipeChinaDongtucheng Road No.5Chaoyang DistrictBeijing100013PR China

Cooperation among enterprises can bring overall and individual performance improvement,and a smooth coordination method is ***,due to the lack of customized coordination methods,cooperation in the downstream oil supply chain cannot be carried out *** paper intends to propose a multi-party coordination method to promote cooperation between oil shippers and pipeline operator by optimizing oil transportation,oil substitution and pipeline pricing *** integrated game-theoretic modeling and analysis approach is developed to characterize the operation behaviors of all stakeholders in the downstream oil supply *** proposed mixed integer nonlinear programming model constrains supply and demand capacity,transportation routes,oil substitution rules and pipeline freight *** transformation and price discretization are introduced for model linear *** experiments are carried out in the oil distribution system in South *** results show that compared to the business-as-usual scheme,the new scheme saves transportation cost by 3.48%,increases pipeline turnover by 5.7%,and reduces energy consumption and emissions by 7.66%and 6.77%.It is proved that the proposed method improves the revenue of the whole system,achieves fair revenue distribution,and also improves the energy and environmental benefits of the oil supply chain.

关键词： Downstreamoil supplychain Multi-partycoordination Cooperative game Mixed integernonlinear programming model Pipeline transportation Revenue distribution

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Selective Hydrodeoxygenation of Lignin-Derived Vanillin via Hetero-Structured High-Entropy Alloy/Oxide Catalysts

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Energy & Environmental Materials 2024年第3期7卷 206-214页

作者： Yan Sun Kaili Liang ren tu Xudong Fan Charles Q.Jia Zhiwen Jia Yingnan Li Hui Yang Enchen Jiang Hanwen Liu Yonggang Yao Xiwei Xu Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Agricultural University Department of Chemical Engineering and Applied Chemistry University of Toronto State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology

The chemoselective hydrodeoxygenation of natural lignocellulosic materials plays a crucial role in converting biomass into value-added *** their complex molecular structures often require multiple active sites synergy for effective activation and achieving high ***,it is reported that a high-entropy alloy (HEA) on high-entropy oxide (HEO)hetero-structured catalyst for highly active,chemoselective,and robust vanillin *** heterogenous HEA/HEO catalysts were prepared by thermal reduction of senary HEOs (NiZnCuFeAIZrOx),where exsolvable metals (e.g.,Ni,Zn,Cu) in situ emerged and formed randomly dispersed HEA nanoparticles anchoring on the HEO *** catalyst exhibits excellent catalytic performance:100%conversion of vanillin and 95%selectivity toward high-value 2-methyl-4 methoxy phenol at low temperature of 120℃,which were attributed to the synergistic effect among HEO matrix(with abundant oxygen vacancies),anchored HEA nanoparticles (having excellent hydrogenolysis capability),and their intimate hetero-interfaces(showing strong electron transferring effect).Therefore,our work reported the successful construction of HEA/HEO heterogeneous catalysts and their superior multifunctionality in biomass conversion,which could shed light on catalyst design for many important reactions that are complex and require multifunctional active sites.

关键词： biomass conversion heterogeneous catalysts high-entropy oxide high-entropy alloys lignin pyrolysis

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基于多项Logit模型的山区高速公路事故致因分析

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科学技术与工程 2024年第5期24卷 2111-2117页

作者：张韡吴晓多白骞娜仁图雅长安大学汽车运输安全保障技术交通行业重点实验室西安710064 西安市轨道交通集团有限公司西安710064

为分析山区高速长大下坡路段事故严重程度的影响因素,首先对地处陕西省、广西壮族自治区、云南省的典型山区高速公路长大下坡路段的道路交通事故数据进行深度调研,共获取2559条事故数据,然后基于上述事故数据,构建了多项Logit事故严重... 详细信息

为分析山区高速长大下坡路段事故严重程度的影响因素,首先对地处陕西省、广西壮族自治区、云南省的典型山区高速公路长大下坡路段的道路交通事故数据进行深度调研,共获取2559条事故数据,然后基于上述事故数据,构建了多项Logit事故严重程度模型,对导致山区高速长大下坡路段交通事故的直接致因进行了分析。分析结果表明:肇事驾驶人超速行驶、违法装载超限、疲劳驾驶、操作不当、违法停车、车辆制动失效对山区高速长大下坡路段伤亡事故有显著影响。研究结果为改善山区公路的运营安全性,从根本上寻求已建成山区高速公路事故频发的有效办法提供了方向。

关键词：交通工程山区高速公路多项Logit模型长大下坡路段交通事故严重程度事故直接致因

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Soil profile characteristics of high-productivity alluvial cambisols in the North China Plain

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Journal of Integrative Agriculture 2015年第4期14卷 765-773页

作者： LIU Hai-tao LI Bao-guo ren tu-sheng College of Resources and Environmental Sciences China Agricultural University

The North China Plain（NCP） is one of major breadbaskets in China. Crop growth and grain yield differ significantly with spatial variations of soil properties. This study aims to identify the key soil properties in relation to the grain yield for the winter wheat（Triticum aestivum L.）-maize（Zea mays L.） cropping system in a high-productivity farmland of the NCP. The field trials were conducted in three fields with different grain yield levels in Tai＇an City, Shandong Province, China, during the 2009–2012 period. Consistent field management strategies were applied in the three fields. Fifty-one physical and chemical indicators of the soil profile as related to grain yield were evaluated. An approximate maximum of 17.8% annual average grain yield difference was observed in the fields during the period of 2009–2012. The soil indicators were classified into three clusters with specific functions using cluster analysis, and three key indicators were extracted from each cluster to characterize the different soil properties of three fields. The first cluster represented soil water retention capacity, and the key indicator was available soil water（ASW）, which ranged from 153 to 187 mm in the 1.2 m profile and was correlated positively with grain yield. The second cluster represented soil water conductivity, as measured by saturated hydraulic conductivity（K s）. The higher yield field had a greater capacity to retain topsoil water for its lower K s（1.9 cm d^–1） in the 30–70 cm soil layer as compared to the lower yield field. The third cluster represented nutrient storage and supply, as indicated by the ratio of nutrient content to silt＋clay content of the top soil layer. The ratio of soil organic matter（OM）, total nitrogen（TN）, available P, exchangeable K＋ to silt＋clay content in the 0–20 cm soil layer were 19.0 g kg^–1, 1.6 g kg^–1, 94.7 mg kg^–1, 174.3 mg kg^–1 in the higher yield field, respectively, and correlated positively with the grain yield. By characterizing the diff

关键词： soil quality assessment cluster analysis grain yield key soil indicators

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Determination of rock resistant coefficient based on Mohr-Coulomb criterion for underwater tunnel

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1239-1244页

作者： Zhong-ren tu Qiang YANG Qi-ming SHEN Xiao-wen WANG State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China School of River and Ocean Engineering Chongqing.Iiaotong University Chongqing 400074 China

According to the load-structure method, the wall rock with lining can bear the load caused by the surrounding rock, and the rock resistant coefficient (RRC) is a key parameter for evaluating the capacity of this wall rock. Based on the Mohr-Coulomb yield criterion, this paper develops a formula for calculating the RRC, which has been applied to the real engi-neering project, such as Xiamen Xiang’an East Passage Underwater tunnel Project. The fact shows that this formula is helpful for designers to determine the RRC value.

关键词： Rock resistant coefficient (RRC) Mohr-Coulomb yield criterion Rock mechanics Underwater tunnel

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Management of bile duct injuries combined with accessory hepatic duct during laparoscopic cholecystectomy

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World Journal of Gastroenterology 2014年第34期20卷 12363-12366页

作者： Pei-tu ren Bao-Chun Lu Jian-Hua Yu Xin Zhu Department of General Surgery Shaoxing People’s Hospital (Shaoxing Hospital of Zhejiang University)

Bile duct injuries(BDIs)are difficult to avoid absolutely when the biliary tract has a malformation,such as accessory hepatic ***,we investigated the management strategies for BDI combined with accessory hepatic duct ... 详细信息

关键词： Bile duct injuries Accessory hepatic duct Laparoscopic cholecystectomy Management strategies Hepatoenterostomy

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Soil Aggregate Stability and Aggregate-Associated Carbon Under Different Tillage Systems in the North China Plain

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Journal of Integrative Agriculture 2013年第11期12卷 2114-2123页

作者： DU Zhang-liu ren tu-sheng HU Chun-sheng ZHANG Qing-zhong Humberto Blanco-Canqui Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences College of Resources and Environmental Sciences China Agricultural University Center for Agricultural Resources Research Institute of Genetics and Development BiologyChinese Academy of Sciences Agricultural Research Center-Hays Kansas State University

The inlfuences of tillage systems on soil carbon （C） stocks have been studied extensively, but the distribution of soil C within aggregate fractions is not well understood. The objective of this study was to determine the inlfuences of various tillage systems on soil aggregation and aggregate-associated C under wheat （Triticum aestivum L.） and corn （Zea mays L.） double cropping systems in the North China Plain. The experiment was established in 2001, including four treatments：moldboard plow （MP） with residue （MP＋R） and without residue （MP-R）, rotary tillage with residue （RT）, and no-till with residue （NT）. In 2007 soil samples were collected from the 0-5, 5-10, and 10-20 cm depths, and were separated into four aggregate-size classes （〉2 000, 250-2 000, 53-250, and〈53 μm） by wet-sieving method. Aggregate-associated C was determined, and the relationships between total soil C concentration and aggregation-size fractions were examined. The results showed that NT and RT treatments signiifcantly increased the proportion of macroaggregate fractions （〉2 000 and 250-2 000 μm） compared with the MP-R and MP＋R treatments. Averaged across all depths, mean weight diameters of aggregates （MWD） in NT and RT were 47 and 20% higher than that in MP＋R. The concentration of bulk soil organic C was positively correlated with MWD （r=0.98; P=0.024） and macroaggregate fraction （r=0.96; P=0.036） in the 0-5 cm depth. In the 0-20 cm depth, comparing with MP＋R, total C occluded in the〉2 000 μm fraction was increased by 9 and 6%under NT and RT, respectively. We conclude that adoption of conservation tillage system, especially no-till, can increase soil macro-aggregation and total C accumulation in macroaggregates, which may improve soil C sequestration in the intensive agricultural region of the North China Plain.

关键词： tillage systems aggregate stability aggregate-associated C

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Low-field NMR inversion based on low-rank and sparsity restraint of relaxation spectra

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Petroleum Science 2022年第6期19卷 2741-2756页

作者： Si-Hui Luo Li-Zhi Xiao Yan Jin Jiang-Feng Guo Xiao-Bo Qu Zhang-ren tu Gang Luo Can Liang College of Artificial Intelligence and College of Petroleum Engineering China University of PetroleumBeijing102249China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China School of Electronic Science and Engineering(National Model Microelectronics College) Xiamen UniversityFujian361005China School of Electronic Science and Engineering National Model Microelectronics College Xiamen University Changzhou Institute of Technology ChangzhouJiangsu213000China

In this paper,we proposed a novel method for low-field nuclear magnetic resonance(NMR)inversion based on low-rank and sparsity restraint(LRSR)of relaxation spectra,with which high quality construction is made possible for one-and two-dimensional low-field and low signal to noise ratio NMR *** this method,the low-rank and sparsity restraints are introduced into the objective function instead of the smoothing *** low-rank features in relaxation spectra are extracted to ensure the local characteristics and morphology of *** sparsity and residual term are contributed to the resolution and precision of spectra,with the elimination of the redundant relaxation *** process of the objective function is designed with alternating direction method of multiples,in which the objective function is decomposed into three subproblems to be independently *** optimum solution can be obtained by alternating iteration and updating *** first,numerical simulations are conducted on synthetic echo data with different signal-to-noise ratios,to optimize the desirable regularization parameters and verify the feasibility and effectiveness of proposed ***,NMR experiments on solutions and artificial sandstone samples are conducted and analyzed,which validates the robustness and reliability of the proposed *** results from simulations and experiments have demonstrated that the suggested method has unique advantages for improving the resolution of relaxation spectra and enhancing the ability of fluid quantitative identification.

关键词： Low-field NMR Inversion method Low-rank and sparsity restraint Relaxation spectra Data processing

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Role of stair-climbing test in predicting postoperativecardiopulmonary complications in elderly patients with biliarydiseases

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Frontiers of Medicine 2010年第1期4卷 77-81页

作者： Pei-tu ren Bao-Chun LU Zhi-Liang CHEN Hong FU Department of Hepatobiliary Surgery Shaoxing People’s HospitalShaoxing 312000China

One hundred and twenty-six patients above 80 years old with biliary diseases undergoing operations in Shaoxing People’s Hospital from Jan.2002 to Jan.2007 were analyzed *** patients performed a preoperative stair-climbing test,and the risks for cardio-pulmonary complications were evaluated with pair-matching and linear correlations analysis between stair-climbing height(h)and left ventricular ejective factor(EF),forced vital capacity(FVC)and forced expiratory volume in one second(FEV1).There was a signiﬁcant difference in the incidence of cardiopulmonary complications among different stair-climbing ***-climbing heights were positively related with EF,FVC and *** suggests that the stair-climbing test is an effective and simple method for predicting cardiopulmonary complica-tions in elderly patients with biliary diseases.

关键词： biliary disease cardiopulmonary complica-tion stair-climbing test

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Analgesic effects and structural elucidation of two new flavone C-glycosides from Artemisa sacrorum

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Chinese Journal of Natural Medicines 2015年第10期13卷 786-790页

作者： WANG Qing-Hu HAN Na-ren-Chao-Ke-tu DAI Na-Yin-Tai WU Rong-Jun WU Jie-Si College of Traditional Mongolian Medicine Inner Mongolia University for Nationalities

The present study was designed to isolate and characterize the analgesic compounds of Artemisa sacrorum Ledeb. The Et OAc crude extracts from the aerial parts of Artemisa sacrorum Ledeb were separated by chromatography and the structures of new compounds were elucidated based on spectral analyses. Analgesic activities of the isolated compounds were assessed in rats with hot plate test and paw pressure assay. Two new flavone C-glycosides, named as Sacroroside A and B(Compounds 1 and 2) were isolated from the Et OAc crude extract of the aerial parts of Artemisa sacrorum Ledeb. They showed significant analgesic effects. In conclusion, Compounds 1 and 2 are new natural products, which show significant analgesic effects in a dose-dependent manner.

关键词： Artemisa sacrorum Ledeb Sacroroside A Sacroroside B Analgesic effect

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