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Optimality Conditions for Rank-Constrained Matrix Optimization

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Journal of the Operations Research Society of China 2019年第2期7卷 285-301页

作者： xin-rong li Wen Song Nai-Hua Xiu Department of Applied Mathematics Beijing Jiaotong UniversityBeijing 100044China School of Mathematical Sciences Harbin Normal UniversityHarbin 150025China

In this paper,we comprehensively study optimality conditions for rank-constrained matrix optimization(RCMO).By calculating the Clarke tangent and normal cones to a rank-constrained set,along with the given Fréchet,Mordukhovich normal cones,we investigate four kinds of stationary points of the RCMO and analyze the relations between each stationary point and local/global minimizer of the ***,the second-order optimality condition of the RCMO is achieved with the help of the Clarke tangent cone.

关键词： Matrix optimization Rank constraint Normal cone First-order optimality condition Second-order optimality condition

Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

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Biochar 2022年第1期4卷 972-985页

作者： Xue-Yu Zeng Yu Wang rong-xin li Hai-Lei Cao Ya-Feng li Jian Lü Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China Anhui Pushi Ecological Environment Engineering Co. Ltd.Hefei 230000China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityNo.2 Xue Yuan RoadFuzhou 350116China

The textural properties and surface chemistry of phosphoric acid-modified biochars(PABCs)prepared at different pyrolysis temperatures(500-700℃)were studied based on the results obtained from XRD,SEM,BET,FT-IR,Raman,XPS and elements *** prepared at higher temperatures tended to possess a bigger proportion of microporous *** adsorption capacity and initial rate of PABCs for sulfadiazine(SDZ)were notably improved to 139.2 mg/g and 9.66 mg/(g min)as calculated from the Langmuir *** adsorption equilibrium time was only one quarter of that without *** H_(3)PO_(4) modification was advantageous to produce phosphate and break functional groups to form disordered carbon structure abundant of *** enhancement in the adsorption of SDZ was due to the confinement effect of hydrophobic cavities from the mircoporous structure and theπ-πelectron-donor-acceptor ***,PABCs exhibited stable adsorption capacities at a wide pH range(3.0-9.0)or relatively high concentrations of coexisting ions.

关键词： Coffee grounds-derived biochar Pyrolysis Surface modification Sulfadiazine adsorption Micropore structure

Microbial Activity in a Temperate Forest Soil as Affected by Elevated Atmospheric CO_2

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Pedosphere 2010年第4期20卷 427-435页

作者： ZHENG Jun-Qiang HAN Shi-Jie ZHOU Yu-Mei REN Fei-rong xin li-Hua ZHANG Yan Forestry Center Institute of Applied Ecology Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 （China）

Microorganisms play a key role in the response of soil ecosystems to the rising atmospheric carbon dioxide （CO2） as they mineralize organic matter and drive nutrient cycling. To assess the effects of elevated CO2 on soil microbial C and N immobilization and on soil enzyme activities, in years 8 （2006） and 9 （2007） of an open-top chamber experiment that begun in spring of 1999, soil was sampled in summer, and microbial biomass and enzyme activity related to the carbon （C）, nitrogen （N） and phosphorus （P） cycling were measured. Although no effects on microbial biomass C were detected, changes in microbial biomass N and metabolic activity involving C, N and P were observed under elevated CO2. Invertase and .dehydrogenase activities were significantly enhanced by different degrees of elevated CO2. Nitrifying enzyme activity was significantly （P 〈 0.01） increased in the August 2006 samples that received the elevated COs treatment, as compared to the samples that received the ambient treatment. Denitrifying enzyme activity was significantly （P 〈 0.04） decreased by elevated COs treatments in the August 2006 and June 2007 （P 〈 0.09） samples, β-N-acetylglucosaminidase activity was increased under elevated CO2 by 7% and 25% in June and August 2006, respectively, compared to those under ambient CO2. The results of June 2006 samples showed that acid phosphatase activity was significantly enhanced under elevated CO2. Overall, these results suggested that elevated CO2 might cause changes in the belowground C, N and P cycling in temperate forest soils.

关键词： CO2 enrichment microbial biomass soil carbon cycling soil nitrogen cycling

Heavy Metal Accumulation in Plants on Mn Mine Tailings

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Pedosphere 2006年第1期16卷 131-136页

作者： liU Yun-Guo ZHANG Hui-Zhi ZENG Guang-Ming HUANG Bao-rong li xin College of Environmental Science and Engineering Hunan University Changsha 410082 （China）. Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）

The Xiangtan Manganese (Mn) Mine in the middle of Hunan Province, China, has been mined since 1913 with mine tailings including excavated wastes, wastewater, and smelting wastes. A survey was conducted on the Mn mine tailing soils and eight plants on the Mn mine tailings. The concentrations of soil Mn, Pb, and Cd and the metal-enrichment traits of these eight plants were analyzed simultaneously. Exceptionally high concentrations of these three metals were found in the soils, especially on the tailing dam. Each plant investigated in this study accumulated the three heavy metals, but no hyperaccumulator of these metals was found. However, analysis indicated that Poa pratensis linn., Gnaphalium affine D. Don, Pteris vittata L., Conyza canadensis (L.) Cronq., and Phytolacca acinosa Roxb. possessed specially good metal-enrichment and metal-tolerant traits. P. pratensis, G. affine, and P. vittata were Pb-tolerant plants; and C. canadensis, P. pratensis, and G. affine were Cd-tolerant plants. P. acinosa had a great tolerance to Mn. and it was a valuable plant for on-site phytoremediation. Phragmites communis Trin. was found to have high metal tolerance and economic benefit as a raw material for paper and should be considered for soil remediation. G. affine and C. canadensis had excessive accumulation of Mn and could be useful in phytoremediation. However, although P. pratensis was a good accumulator, it was not a suitable plant for soil remediation because its biomass was too little.

关键词： heavy metal metal-tolerant plant Mn mine tailings phytoremediation soil

Dissecting the underlying pharmaceutical mechanism of Danggui Buxue decoction acting on idiopathic pulmonary fibrosis with network pharmacology

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Traditional Medicine Research 2020年第4期5卷 238-251页

作者： Cai-Ping Zhao Hang li Xiao-Hong liu Shuang liang Xue-Lei liu xin-rong li Yi Luo Mei-ling Zhu Baoan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine Shenzhen 518133China Guangzhou University of Chinese Medicine Guangzhou 510006China

Backgroud:Danggui Buxue decoction(DBD),a classical prescription in traditional Chinese medicine,has been found to have protective effect on bleomycin-induced pulmonary fibrosis in rats by reducing alveolar inflammation and ***,the biological activity of individual chemical components and mechanism of action of whole formula are not ***:Potential targets of active ingredients of DBD were collected through Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform and SymMap *** genes related to idiopathic pulmonary fibrosis were obtained from the Online Mendelian Inheritance in Man database,Therapeutic Targets Database and Gkb ***,the common targets were obtained by overlapping the potential targets of active ingredients in DBD and diseases related *** selected targets were subjected to Kyoto Encyclopedia of Genes and Genomes signaling pathway and Gene Ontology analysis,and the network map of active component-target-pathway was established using Cytoscape 3.7.1 *** active components of DBD with most targets were selected for fibrosis-related marker *** mRNA and protein expression of fibrosis markers,α-smooth muscle actin,collagen 1 and fibronectin,were detected in TGF-β1-induced fibroblast cell line after treatment with the active ***:The 14 active ingredients,such as quercetin and kaempferol,were screened from *** acts on 26 targets like estrogen receptor 2 and prostaglandin-endoperoxide synthase 2,and mainly involves 38 signaling pathways such as cell inflammation and *** and quercetin are the two compounds with the highest network regulation,which can inhibit the transformation of fibroblasts into myofibroblasts and reduce the expression of fibrosis markersα-smooth muscle actin,collagen 1 and ***:The integration mode of multi-component,multi-target,multi-channel and mechanism of DBD in the treatment of idiopathic pu

关键词： Danggui Buxue decoction Pulmonary fibrosis Network pharmacology Myofibroblast Chinese medicine formula Mechanism of action

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浅层地震勘探在奥运公园探测溶洞的应用研究

地质与勘探 2004年第Z1期40卷 136-138页

作者：荣立新中国地质科学院地球物理地球化学勘查研究所廊坊065000

溶洞的探测与准确定位对于地质灾害预防、工程施工及旅游开发等意义重大.在有利的条件下,利用反射地震方法探测溶洞是一种有效的方法技术.文章结合有关溶洞的地震数值模拟结果,系统介绍了在北京奥运公园内探测溶洞(或溶蚀带)的高分辨率... 详细信息

溶洞的探测与准确定位对于地质灾害预防、工程施工及旅游开发等意义重大.在有利的条件下,利用反射地震方法探测溶洞是一种有效的方法技术.文章结合有关溶洞的地震数值模拟结果,系统介绍了在北京奥运公园内探测溶洞(或溶蚀带)的高分辨率地震方法技术和取得的部分勘查应用成果.

关键词：地震方法数据采集和处理数值模拟溶蚀带

Impaired PI3K/Akt signal pathway and hepatocellular injury in high-fat fed rats

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World Journal of Gastroenterology 2010年第48期16卷 6111-6118页

作者： Ji-Wu Han,Department of Gastroenterology,The 4th Hospital of Harbin Medical University,Harbin 150001,Heilongjiang Province,China Xiao-rong Zhan,xin-Yu li,Bing Xia,Yue-Ying Wang,Jing Zhang,Department of Endocrinology,First Hospital of Harbin Medical University,Harbin 150001,Heilongjiang Province,China Bao-xin li,Department of Pharmacology,State Key Laboratory of Biomedicine and Pharmacology,Harbin Medical University,Harbin 150001,Heilongjiang Province,China Department of Endocrinology First Hospital of Harbin Medical University Harbin 150001 Heilongjiang Province China. xiaorongzhan@***

AIM:To determine whether mitochondrial dysfunction resulting from high-fat diet is related to impairment of the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt,also known as PKB) pathway. METHODS:Rat models of nonalcoholic fatty liver were established by high-fat diet feeding. The expression of total and phosphorylated P13K and Akt proteins in hepatocytes was determined by Western blotting. Degree of fat accumulation in liver was measured by hepatic triglyceride. Mitochondrial number and size were determined using quantitative morphometric analysis under transmission electron microscope. The permeability of the outer mitochondrial membrane was assessed by determining the potential gradient across this ***:After Wistar rats were fed with high-fat diet for 16 wk,their hepatocytes displayed an accumulation of fat (103.1 ± 12.6 vs 421.5 ± 19.7,P ling pathway,which may lead to hepa-tocellular injury through activation of the mitochondrial membrane pathway of apoptosis.

关键词： Nonalcoholic fatty liver Phosphatidylinositol 3-kinase/protein kinase B signaling pathway Mitochondria B-cell lymphoma gene 2 Caspase-3

The clinical significance of continuous and en bloc resection of level Ⅱ in functional neck dissection

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中国口腔颌面外科杂志 2008年第B5期6卷 61-62页

作者： Jie Huang Mao Chang Ye rong xin li Lai Ping Wang Fei Fei Gong Department of Oral and Maxillofacial Surgery ProvincialHospital Affiliated to A nhui Medical University Hefei 230001China

Defect Engineering:Can it Mitigate Strong Coulomb Effect of Mg^(2+)in Cathode Materials for Rechargeable Magnesium Batteries?

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Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing Fan Ruimin li xin Zhang Wanyu Zhao Zhenghui Pan Xiaowei Yang School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage ***,the sluggish diffusion kinetics of bivalent Mg^(2+)in the host material,related to the strong Coulomb effect between Mg^(2+)and host anion lattices,hinders their further development toward practical *** engineering,regarded as an effective strategy to break through the slow migration puzzle,has been validated in various cathode materials for *** this review,we first thoroughly understand the intrinsic mechanism of Mg^(2+)diffusion in cathode materials,from which the key factors affecting ion diffusion are further ***,the positive effects of purposely introduced defects,including vacancy and doping,and the corresponding strategies for introducing various defects are *** applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also ***,the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish diffusion kinetic Defect engineering Cathode materials Ion migration