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Continuity properties for commutators of multilinear type operators on product of certain Hardy spaces

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Frontiers of Mathematics in China 2014年第6期9卷 1325-1347页

作者： wen.juan li Qingying XUE School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics andComplex Systems Ministry of Education Beijing 100875 China

Similar to the property of a linear Calderdn-Zygmund operator, a linear fractional type operator Is associated with a BMO function b fails to satisfy the continuity from the Hardy space Hp into Lp for p ≤ 1. Thus, an alternative result was given by Y. Ding, S. Lu and P. Zhang, they proved that [b,Iα] is continuous from an atomic Hardy space Hp b into Lp, where Hp b is a subspace of the Hardy space Hp for n/（n ＋ 1）〈 p ≤ 1. In this paper, we study the commutators of multilinear fractional type operators on product of certain Hardy spaces. The endpoint （Hp1 b1 ×... × HP2, Lp） boundedness for multilinear fractional type operators is obtained. We also give the boundedness for the commutators of multilinear Calderdn-Zygmund operators and multilinear fractional type operators on product of certain Hardy spaces when b ∈ （lipβ）m（Rn）.

关键词： Multilinear fractional type operator multilinar Calderdn-Zygmundoperator commutator Hardy type space

Laws of Large Numbers of Negatively Correlated Random Variables for Capacities

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Acta Mathematicae Applicatae Sinica 2011年第4期27卷 749-760页

作者： wen-juan li Zeng-jing CHEN School of Mathematics Shandong University Jinan 250100 China

Our aim is to present some limit theorems for capacities. We consider a sequence of pairwise negatively correlated random variables. We obtain laws of large numbers for upper probabilities and 2-alternating capacities, using some results in the classical probability theory and a non-additive version of Chebyshev＇s inequality and Boral-Contelli lemma for capacities.

关键词： law of large numbers 2-alternating capacity negatively correlated random variables upper probability

Electrochemical behavior of gold and its associated minerals in alkaline thiourea solutions

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International Journal of Minerals,Metallurgy and Materials 2018年第7期25卷 737-743页

作者： he zhou yong-sheng song wen-juan li kun song national engineering laboratory of biohydrometallurgy grimat engineering institute co.ltdbeijing 101407China school of chemical&environmental engineering china university of mining&technologybeijing 100083China

Electrochemical measurements were conducted to study the electrochemical behavior of gold （Au） and its commonly associated minerals in alkaline thiourea solutions. The results indicated that without addition of any stabilizer, selective dissolution of Au from stibnite and pyrite was only possible at relatively low thiourea concentrations. As Na2SiO3 was added, pyrite started to become active and an oxida- tion peak appeared; the oxidation peaks of axsenopyrite and chalcocite appeared earlier thaxl that of Au. The chalcocite peak shifted in the positive direction and the peak current increased. Stibnite did not show an oxidation peak and its current was nearly zero. Adding Na2SiO3 favored the selective dissolution of Au when its minerals were associated with chalcocite and stibinte. At pH 12, the Au anode dissolution peak current increased with stabilizer concentration. At 0.38 and 0.42 V and for Na2SiO3 concentration below 0.09 M, the current density continuously increased with Na2SiO3 concentration. The Na2SiO3 concentration had to be adequate to stabilize thiourea. When the potential was higher than 0.42 V, the surface of the Au electrode started to passivate. With an additional increase in potential, the presence of Na2SiO3 could not stop the inevitable decomposition of thiourea.

关键词： alkaline daiourea Au associated mineral Na2SiO3 electrochemical behavior

Regulatory effect of miRNA 320a on expression of aquaporin 4 in brain tissue of epileptic rats

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Asian Pacific Journal of Tropical Medicine 2015年第10期8卷 791-796页

作者： Yu-Cheng Song wen-juan li liu-Zhi li Department of Neurology Shandong Ankang Hospital Institute of Forensic Medicine and Laboratory Medicine Jining Medical University

Objective:To study the expression of miRNA 320 a in the brain tissue of epileptic rats and analyze its effect on the expression of aquaporin 4(AQP4).Methods:All rats were performed with the intraperitoneal injection of lithium chloride(3 mmol/kg) and then the intraperitoneal injection of pilocarpine(30 mg/kg) 24 h later(injected twice) to prepare the epileptic model of Wistar *** in the control group were injected with the equal volume of normal *** to the Racine scale,rats with over stage 3 of epilepsy were chosen and the brain tissue was separated quickly and then stored at-80 ℃.The immunohistochemistry was used to detect the expression of aquaporin in the brain tissue of epileptic model and the Real-time PCR was employed to determine the difference in the expression of miRNA 320 a and AQP4 in the brain tissue of rats between the epileptic model group and control *** 5-day neonatal Wistar rats were chosen to collect the cerebral cortex and their primary astrocytes were separated and *** were transfected with miRNA mimic and imitated to the endogenous miRNA 320 a to up-regulate the expression of miRNA 320 ***:In the model group,the expression of AQP4 was significantly higher than the control group(P<0.01).However,the expression of miRNA 320 a in the model group was lower than control group(P<0.05),which was negatively correlated to *** the primary astrocytes,the transfection of miRNA 320 a mimic could significantly reduce the expression of AQP4,while its inhibitor could up-regulate the expression of AQP4,which indicated that miRNA 320 a could reduce the expression of ***:In the primary astrocytes of rats,the miRNA 320 a could inhibit the expression of AQP4 and after adding the inhibitor of miRNA 320 a,the expression of AQP4 was up-regulated.

关键词： miRNA 320a Epilepsy Aquaporin AQP4

Comprehensive recovery of gold and base-metal sulfide minerals from a low-grade refractory ore

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International Journal of Minerals,Metallurgy and Materials 2016年第12期23卷 1377-1386页

作者： wen-juan li Shuang liu Yong-sheng Song Jian-kang wen Gui-ying Zhou Yong Chen National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals School of Chemical & Environmental Engineering China University of Mining & TechnologyBeijing

The comprehensive recovery of small amounts of valuable minerals such as gold and base-metal sulfide minerals from a low-grade refractory ore was investigated. The following treatment strategy was applied to a sample of this ore： gold flotation-gold concen- trate leaching-lead and zinc flotation from the gold concentrate leaching residue. Closed-circuit trials of gold flotation yielded a gold concen- trate that assayed at 40.23 g·t-1 Au with a recovery of 86.25%. The gold concentrate leaching rate was 98.76%. Two variants of lead-zinc flotation from the residue--preferential flotation of lead and zinc and bulk flotation of lead and zinc--were tested using the middling processing method. Foam from the reflotation was returned to the lead rougher flotation or lead-zinc bulk flotation, whereas middlings from reflotation were discarded. Sulfur concentrate was a byproduct. The combined strategy of flotation, leaching, and flotation is recommended for the treatment of this kind of ore.

关键词： comprehensive recovery gold sulfide minerals mineralogy refractory ore treatment

An index method to evaluate growers' pesticide use for identifying on-farm innovations and effective alternative pest management strategies:a case study of winegrape in Madera County,California

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第3期12卷 226-246页

作者： wen-juan li Zhi-hao QIN Ming-hua ZHANG Joe BROWDE Institute of Agro-Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 China Internatinal Institute for Earth System Sciences Nanjing University Nanjing 210093 China Department of Land Air and Water Resources University of California Davis CA 95616 USA California Association of Winegrape Growers Sacramento CA 95825 USA

Winegrape is an important perennial crop in California,*** year California winegrape farming consumes about 20 million kilograms of pesticides that have been a pollutant source to the fresh water systems of the *** variation of pesticide use among winegrape growers has been *** has been observed that some growers have developed effective ways to reduce pesticide use,yet control pests efficiently to ensure ***-tification of the growers with low and high pesticide use is very helpful to extension programs that aim on reducing pesticide environmental *** this study,an index approach is proposed to quantitatively measure pesticide use intensity at grower *** integrated pesticide use index is developed by taking pesticide quantity and toxicity into *** additive formula and a multiplying formula were used to calculate the pesticide use index,i.e.,PUI and *** was found that both PUI and PUIM were capable of identifying the low and high pesticide users while PUI was slightly more conservative than *** pesticides used in California winegrape farming were taken into account for calculating the *** County,one of the largest winegrape producers in California,was taken as an example to test the proposed *** year 2000,among the total 208 winegrape growers,28 with PUI≤10 and 34 with 10lied few pesticides(1-3 only) ,and emphasized the use of low toxicity ***,19 growers with PUI>60,identified as high pesticide users,had large-sized vineyards,i.e.,more fields and large planted *** used all types of pesticides and many compounds,which indicated that their pest controls he

关键词： Pesticide use index Toxicity Compound Pesticide environmental risk California

Energy management for multi-microgrid system based on model predictive control

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Frontiers of Information Technology & Electronic Engineering 2018年第11期19卷 1340-1351页

作者： Ke-yong HU wen-juan li li-dong WANG Shi-hua CAO Fang-ming ZHU Zhou-xiang SHOU Qianjiang College Hangzhou Normal University MOE Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology Zhejiang University of Technology School of Information Science and Engineering Hangzhou Normal University

To reduce the computation complexity of the optimization algorithm used in energy management of a multi-microgrid system, an energy optimization management method based on model predictive control is presented. The idea of decomposition and coordination is adopted to achieve the balance between power supply and user demand, and the power supply cost is minimized by coordinating surplus energy in the multi-microgrid system. The energy management model and energy optimization problem are established according to the power flow characteristics of microgrids. A dual decomposition approach is imposed to decompose the optimization problem into two parts, and a distributed predictive control algorithm based on global optimization is introduced to achieve the optimal solution by iteration and coordination. The proposed method has been verified by simulation, and simulation results show that the proposed method provides the demanded energy to consumers in real time, and improves renewable energy efficiency. In addition, the proposed algorithm has been compared with the particle swarm optimization(PSO) algorithm. The results show that compared with PSO, the proposed method has better performance, faster convergence, and significantly higher efficiency.

关键词： Microgrids Energy management Predictive control Renewable energy Controllable energy

Electrochemical dissolution behavior of gold and its main coexistent sulfide minerals in acid thiocyanate solutions

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Rare Metals 2022年第1期41卷 254-261页

作者： Guan Le wen-juan li Kun Song Yong-Sheng Song Yong Chen An-Ping Bai Yu Cheng National Engineering Laboratory of Biohydrometallurgy GRINM Group Co.Ltd.Beijing 100088China GRINM Resources and Environment Tech.Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China School of Chemical and Environmental Engineering China University of Mining and TechnologyBeijing 100083China GRIMAT Engineering Institute Co. Ltd.(GRIMAT)Beijing 101407China Jiangxi Copper Technology Research Institute Co. LtdNanchang 330096China Beijing Vocational College of Labour and Social Security Beijing 102200China Jiangsu East China Mineral Exploration and Development Bureau Nanjing 210007China

Electrochemical tests were developed to investigate the electrochemical dissolution behavior of gold and its main coexistent sulfide minerals in acid thiocyanate *** optimal leaching conditions for gold in acidic thiocyanate system were pH 2,0.15 mol·L^(-1) thiocyanate and 0.2 g·L^(-1)Fe^(3+).Fe^(3+) addition to the acidic thiocyanate system promoted gold dissolution significantly,arsenopyrite dissolution was inhibited,chalcopyrite dissolution was increased,and the dissolution behavior of other associated minerals remained mostly *** made gold and associated mineral leaching *** galvanic corrosion effect of gold and its main coexistent sulfide minerals in an acidic thiocyanate-free system was that the chalcocite,arsenopyrite and pyrite acted as a cathode to reduce anodic gold dissolution;galena as an anode undergoes oxidation to inhibit anodic gold *** was almost no galvanic corrosion behavior between stibnite,yellow sphalerite and black sphalerite and *** addition changed the galvanic corrosion behavior of stibnite and yellow sphalerite in the thiocyanate system,which inhibited anodic gold *** the acidic thiocyanate system in the presence of ferric iron,the arsenopyrite promoted anodic gold dissolution,the chalcocite and gold were mostly free of galvanic corrosion,and the remaining minerals inhibited anodic gold dissolution.

关键词： Acid thiocyanate Ferric iron Electrochemical adsorption Associated mineral

Acid fibroblast growth factor reduces rat intestinal mucosal damage caused by ischemia-reperfusion insult

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World Journal of Gastroenterology 2005年第41期11卷 6477-6482页

作者： Wei Chen Xiao-Bing Fu Shi-li Ge Tong-Zhu Sun wen-juan li Zhi-Yong Sheng Wound Healing and Cell Biology Laboratory Burns Institute 304th Clinical Department General Hospital of PLABeijing 100037 China Institute of Radiation Medicine Academy of Military Medicine Sciences Beijing 100850 China

AIM： To detect the effects of acid fibroblast growth factor （aFGF） on apoptosis and proliferation of intestinal epithelial cells in differentiation or proliferation status to explore the protective mechanisms of aFGF. METHODS： Wistar rats were randomly divided into sham-operated control group （C, n = 6）, intestinal ischemia group （I, n = 6）, aFGF treatment group （A, n =48） and intestinal ischemia-reperfusion group （R, n =48）. Apoptosis of intestinal mucosal cells was determined with terminal deoxynucleotidyl transferasemediated dUTP-biotin nick-end labeling （TUNEL） technique. Proliferating cell nuclear antigen （PCNA） protein expression and distribution were detected with immunohistochemical method. Plasma levels of D-lactate were determined with modified Brandts method. RESULTS： In A group, administration of exogenous aFGF could improve intestinal histological structure and decrease plasma D-lactate levels at 2-12 h after the reperfusion compared with R group. The apoptotic rates and PCNA protein expressions were not increased until 2 h after reperfusion and were maximal at 12 h. After reperfusion for 2-12 h, the apoptotic rates were gradually augmented along the length of jejunal crypt-villus units. Administration of aFGF could significantly reduce the apoptotic response at 2-12 h after reperfusion （P〈0.05）. Apoptosis rates in villus and crypt epithelial cells in A group at 12 h after reperfusion were （62.5±5.5）% and （73.2±18.6）% of those in R group, respectively. Treatment of aFGF could apparently induce protein expression of PCNA in intestinal mucosal cells of A group compared with R group during 2-22 h after reperfusion （P〈0.05）. There were approximately 1.3- and 1.5-times increments of PCNA expression levels in villus and crypt cells in A group at 12 h after reperfusion compared with R group, respectively. CONCLUSION： Intestinal I/R insult could lead to histological structure change and apoptotic rate increment. The protective effects of aFGF against isch

关键词： Acid fibroblast growth Ischemia Reperfusion Intestine Crypt Villus