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CaY-zeolite Catalyzed Etherification and Alkylation of Substituted Benzyl Alcohols

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Chinese Chemical Letters 2006年第1期17卷 15-18页

作者： Wei yu Miao WEN Guang yu ZHAO li yang Zhong li liU National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000

The reaction of p- and/ α-subtituted benzyl alcohols in CaY-zeolite produced the corresponding dibenzyl ethers and/or benzyl toluenes as the principal products.

关键词： Benzyl alcohols CaY-zeolite etherification alkylation.

Ecological compensation based on willingness to accept for conservation of drinking water sources

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Frontiers of Environmental Science & Engineering 2015年第1期9卷 58-65页

作者： linyu XU Bing yu yang li State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China

Ecological compensation is a powerful environmental economic tool for environmental protection in areas where drinking water sources are located. We established an ecological compensation accounting system based on respondents＇ willingness to accept （WTA）. In this system, stakeholder preferences and the factors that influence them can be gauged effectively using logit and tobit models. We applied this accounting system to ecological compensation for the Miyun Reservoir, Beijing, China. The average WTA value for Miyun Reservoir residents was approximately 1186 CNY per family in 2012, which could be set as a suitable compensation standard, since it is slightly higher than the local protection cost. Thus, the annual total ecological compensation could be 58.73 million CNY. Distance from the reservoir, job types, and attitude to environmental protection were variables with significant effects on WTA. In addition, trends for individual preferences were identified via an analysis of key influential factors. The results suggest some useful information for establishing ecological compensation mechanisms for conservation of drinking water sources. Suggestions include popularizing the concept and meaning of ecological compensation among residents, setting different compensation levels based on distance from the reservoir, considering the requirements of farmers, and taking various in-kind and out-of-kind compensa- tion approaches.

关键词： contingent valuation method questionnaire survey Miyun Reservoir

Fabrication and Photoelectrochemical Properties of[Ru(bpy)_2dppz]^(2+) on ITO Electrode Associated with the Oxidation of Guanine

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Chemical Research in Chinese Universities 2010年第4期26卷 649-655页

作者： GUO Qing-yu li Hong yang Hui-yi SHAO Jiang-yang Key Lab of Technology on Electrochemical Energy Storage and Power Generation in Guangdong Universities School of Chemistry and Environment South China Normal University Guangzhou 510006 P. R. China

Electrochemical assembly of [Ru（bpy）2dppz]^2＋{bpy=2,2＇-bipyridine, dppz=dipyrido[3,2-a：＂2＇,3＇-c]phenazine} on an ITO electrode in the presence of guanine and photoelectroehemical properties of the assembled layer were investigated. It has been found that [Ru（bpy）2dppz]^3＋/2＋ can be assembled onto the ITO electrode by the method of repetitive voltammetric sweeping, and the assembly is enhanced by guanine. The peak currents of prewaves increase linearly up to a guanine concentration of 0.25 mmol/L. More importantly, upon illumination with 470 nm light source and at an applied potential of 0.2 V, cathodic current for the fabricated layer on the ITO electrode indicate a linear enhancement with the rise of guanine concentration. Meanwhile, [Ru（bpy）2dppz]^2＋ can be served as an excellent mediator to prompt the oxidation of guanine, and the mediated peak current increases linearly with added guanine concentration from 0.01 to 0.25 mmol/L. In addition, the assembly mechanism of [Ru（bpy）2dppz]^2＋ on the ITO electrode associated with the oxidation of guanine and the assistance of light irradiation were discussed.

关键词： Polypyridvl ruthenium(II) complex Guanine ITO Assembly Photoelectrochemistrv

Hydrothermal Synthesis and Crystal Structure of a Hybrid Compound Based on β-Octamolybdate [Mn(2,2’-bipy)_3]_2[β-Mo_8O_(26)]·4H_2O

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Chinese Journal of Structural Chemistry 2005年第10期24卷 1164-1168页

作者： SHEN yue yu li NIU Jing-yang WANG Jing-Ping School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

A hybrid compound [Mn（2,2＇-bipy）3]2[β-Mo8O26]·4H2O prepared by the hydrothermal method consists of a [β-Mo8O26]^4- isopolyanion, two isolated manganese-bipyridyl units [Mn（2,2＇-bipy）3]^2＋ and four crystal water molecules. Each [Mn（2,2＇-bipy）3]^2＋ is defined by six nitrogen atoms from three 2,2＇-bipyridine molecules forming a distorted MnN6 octahedron. Crystallographic data for the title compound： monoclinic, space group P21/c, a = 12.156（2）, b = 13.738（3）, c = 21.949（4） A,β = 90.44（3）°, V = 3665.3（13） A^3, Mr = 2302.57, Z = 2, Dc = 2.086 g/cm^3, F（000） = 2252, T= 293（2） K,μ（Mo-Kα） = 1.745 mm^-1, R = 0.0436, wR = 0.1056, and GOF = 1.074 for 550 parameters and 5515 observed reflections with I 〉 2σ（I）.

关键词： hydrothermal synthesis isopolyanion crystal structure octamolybdate

Geochemistry of the limahe Intrusion in the Panxi District, SW China:Discussion on the Relationship to the Emeishan Basalts

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 105-116页

作者： li Ying ZHANG Zhaochong AI yu ZHAO li yang Tiezheng State Key Laboratory of Processed and Mineral Resources China University of Geoscinces Beijing 100083 China

The limahe intrusion is a typical rock hosting Cu-Ni sulfide deposit in the Panxi district. The major element, trace element and Sr-Nd isotopic geochemical data are reported in this study both firstly and systemically. Age-corrected （87Sr/86Sr） and εNd（t） isotope values, ranging from 0.687062 to 0.709298, from -0.6 to -4.13 respectively, are partly overlap the field of the Emeishan basalt and OIB, and they lie between upper crust and OIB generally. The similar patterns between the limahe intrusion and the picrites of the Emeishan large igneous province imply the genetic relationship to the Emeishan basalts. Their lower Nb/U （〈30）, higher （La/Nb）pM and （Th/Ta）pM ratio values （〉1） indicate contamination of the upper crust material. The correlation between MgO and major oxides reflects the fractional crystallization of olivine, clinopyroxene and minor plagioclase in the deep-seated chamber. Therefore increased SiO2 and lowered FeO by the upper crustal contamination may trigger immiscible sulfide melt, which then flowed along the structural fracture and intruded into gabbrodiorite, resulting in the formation of Cu-Ni sulfide orebody.

关键词： assimilation geochemistry mafic-utramafic intrusions limahe Panxi district

BSPM:A NEW MECHANISM FOR “OVERLAP-MATCHING EXPRESSIONS”IN DPI

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Journal of Electronics(China) 2010年第3期27卷 289-297页

作者： li Zheng yu Nenghai li yang MOE-Microsoft Key Lab of Multimedia Computing and Communication University of Science and Technology of China Hefei 230027 China

Nowadays, using Deterministic Finite Automata (DFA) or Non-deterministic Finite Automata (NFA) to parse regular expressions is the most popular way for Deep Packet Inspection (DPI), and the research about DPI focuses on the improvement of DFA to reduce memory. However, most of the existing literature ignores a special kind of "overlap-matching expression", which causes states explosion and takes quite a large part in the DPI rules. To solve this problem, in this paper a new mechanism is proposed based on bitmap. We start with a simple regular expression to describe "overlap-matching expressions" and state the problem. Then, after calculating the terrible number of exploded states for this kind of expressions, the procedure of Bitmap-based Soft Parallel Mechanism (BSPM) is described. Based on BSPM, we discuss all the different types of "overlap-matching ex- pressions" and give optimization suggestions of them separately. Finally, experiment results prove that BSPM can give an excellent performance on solving the problem stated above, and the optimization suggestions are also effective for the memory reduction on all types of "overlap-matching expressions".

关键词： Intrusion detection Deep Packet Inspection (DPI) Regular expressions Bitmap-based Deterministic Finite Automata (DFA)

Experimental and theoretical analysis on the procedure for estimating geo-stresses by the Kaiser effect

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 514-518页

作者： yuan-hui li yu-jiang yang Jian-po liu Xing-dong Zhao College of Resources and Civil Engineering Northeastern University Shenyang 110004 China

Acoustic emission tests of the core specimens retrieved from boreholes at the depth over 1000 m in Hongtoushan Copper Mine were carried out under uniaxial compressive loading, and the numerical test was also done by using the rock failure process analysis （RFPA2D） code, based on the procedure for estimating geo-stresses by the Kaiser effect under uniaxial compression. According to the statistical damage mechanics theory, the Kaiser effect mechanism was analyzed. Based on these analyses, it is indicted that the traditional method of estimating geo-stresses by the Kaiser effect is not appropriate, and the result is usually smaller than the real one. Furthermore, the greater confining compression in the rock mass may result in a larger difference between the Kaiser effect stresses acquired from uniaxial loading in laboratory and the real in-situ stresses.

关键词： rock stresses Kaiser effect cyclic loading acoustic emission

Pd/C-catalyzed selective reduction of aromatic azides with Hantzsch 1,4-dihydropyridine

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Chinese Chemical Letters 2008年第8期19卷 885-888页

作者： Zhen Gang liu Xiu Qin Niu Wei yu li yang Zhong li liu State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

The reagent combination of Hantzsch 1,4-dihydropyridine and Pd/C was found to be an efficient reducing system for the selective reduction of aromatic azides.

关键词： Reduction Hantzsch 1,4-dihydropyridine Pd/C Aromatic azides

Patients’awareness about their own breast cancer characteristics

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World Journal of Clinical Cases 2021年第24期9卷 7043-7052页

作者： Chong Geng Guo-Jun Lu Jing Zhu yu-yang li Department of Breast and Thyroid Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina Department of General Surgery Third Affiliated Hospital of Shandong First Medical UniversityAffiliated Hospital of Shandong Academy of Medical SciencesShandong First Medical UniversityJinan 250031Shandong ProvinceChina Department of Breast Surgery Foshan Maternity and Child Health Care HospitalFoshan 528000Guangdong ProvinceChina

BACKGROUND Patients’knowledge about the characteristics of their own cancer could be an important factor for understanding treatment regimens and adhering to ***,to date nothing is known about the awareness among Chinese breast cancer patients about the characteristics of their own *** To investigate how much knowledge that Chinese breast cancer patients have about their tumor characteristics and the impact of health and education literacy on the acquisition of such *** The survey was administered to patients who were diagnosed with breast cancer from 2017 to 2019 in three hospitals in China,and who came in for regular followup on an outpatient *** collected responses from 226 respondents who were asked about their cancer characteristics(stage,grade,and estrogen receptor status and human epidermal growth factor receptor 2 status of the cancer),and evaluated the correctness by comparing with their medical *** regression was used to assess the probability of knowing and of correctly answering *** also analyzed the association between our findings and the level of the patient’s education and their health *** Overall,20.80%to 57.96%of the patients reported knowing about the characteristics of breast cancer;of these,10.18%to 46.46%reported these characteristics ***,age,and health literacy were all significantly associated with awareness rate,and with the level to which this information was *** Breast cancer patients in China know little about their disease,and better education aimed at improving their knowledge about cancer characteristics is urgently *** low level of awareness could represent a deficiency of communication between surgeons and patients,which may be one of the reasons why medical disputes occur in China.

关键词： Breast cancer Awareness Characteristics Health literacy Education