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NUMERICAL SIMULATION OF FLOW FIELDS IN A NATURAL DRAFT WET-COOLING TOWER

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Journal of Hydrodynamics 2007年第6期19卷 762-768页

作者： YANG Xiang-liang SUN Feng-zhong WANG Kai SHI yue-tao WANG Nai-hua Heze Power Plant China Guodian Coporation Heze 274000 China School of Power and Energy Engineering Shandong University Jinan 250061 China

The flow field in the hyperbolic natural draft wet-cooling tower, which has great effects on the economy and security of power plant, was studied through numerical simulation. The mathematical model was established and analyzed in order to optimize the cooling-tower and to evaluate its efficiency. Various working conditions were considered and compared with each other, such as the circulating water flux, air temperature and tower resistance. It is concluded that when the cooling-tower runs without wind, there is a vacuum region inside the tower and the pressure rises with the increase of the tower height. Meanwhile, the inner flow field is axisymmetrical. The air velocity achieves its climax at the axis. It is also found that the effect of circulating water temperature is equivalent to that of the water flux.

关键词： cooling tower flow field circulation water flux circulation water temperature numerical simulation

Chemoselective and Living/Controlled Polymerization of Alkenyl Methacrylates by the Phosphonium Ylide/Organoaluminum Lewis Pairs

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Chinese Journal of Polymer Science 2024年第2期42卷 159-167,I0005页

作者： Zhi-Kang Chen Wu-Chao Zhao Yi-Ling Zhao Cong-Lei Liu Liu-Yin Jiang yue-tao Zhang Hong-Ping Zhu State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun130012China

Chemoselective,living/controlled polymerizations of allyl methacrylate(AMA) and vinyl methacrylate(VMA) with/without methyl methacrylate(MMA) by using the phosphonium ylide/organoaluminum based Lewis pairs(LPs) have been *** P-ylide-2/AIMe(BHT)_(2)(Pylide-2=Ph_(3)P=CHMe and BHT=2,6-iBu_(2)-4-MeC_(6)H_(2)O) was demonstrated to be superior by which homopolymers PAMAs(M_(n)=27.6-111.5kg/mol and ■=1.14-1.25) and PVMAs(M_(n)=28.4-78.4 kg/mol and ■=1.12-1.18) and block copolymers PMMA-b-PAMA,PAMA-b-PVMA,PAMA-bPMMA,PMMA-b-PAMA-b-PMMA,PAMA-b-PMMA-b-PAMA,and PAMA-b-PVMA-b-PAMA were *** the polymerizations,all of the monomers were reacted by the conjugated ester vinyl groups leaving intactly the nonconjugated acryloxy *** pendant acryloxy groups attached to the main chain enable further to post-functionalization by the AIBN-induced radical "thiol-ene" reaction using PhCH_(2)*** thiolether side group-containing polymers PAMA-SCH_(2)Ph and PAMA-SCH_(2)Ph-b-PMMA-b-PAMA-SCH_(2)Ph were thus prepared.

关键词： Phosphonium ylide Alkenyl methacrylate Chemoselectivity Living/controlled polymerization Post-functionalization

Research on distributed intrusion detection system based on multi-living agent

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Science China(Information Sciences) 2010年第5期53卷 1067-1077页

作者： WANG yue, tao Ran & ZHANG Hao Department of Information and Electronic Engineering, Beijing Institute of Technology, Beijing 100081, China Department of Information and Electronic Engineering Beijing Institute of Technology Beijing China

In this paper, we propose a novel distributed intrusion detection system based on multi-living agent inspired by the research method of multi-living agent complex information system for improving the security of distributed intrusion detection system using mobile agent. The previous two-layer distributed intrusion detection system has been expanded into a three-layer structure, the new layer of which can monitor the livelihood of each detection agent and utilize the negotiation-coordination mechanism to adjust the working way of each agent for protecting the security of system. In this paper, we propose a quantitative analysis method of agent livelihood in distributed intrusion detection system and further present the design method of living agent. Finally, through the analysis of system working flow and the detection effect of distributed denial of service attack, we have shown that the security and stability of the novel distributed intrusion detection system is effectively enhanced and the agent can work normally in strict restraint strong countermeasure environment.

关键词： multi-living mobile agent living agent lifecycle

LncRNA-mediated posttranslational modifications and reprogramming of energy metabolism in cancer

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Cancer Communications 2021年第2期41卷 109-120页

作者： yue-tao Tan Jin-Fei Lin Ting Li Jia-Jun Li Rui-Hua Xu Huai-Qiang Ju Department of Medical Oncology Sun Yat-sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhouGuangdong 510060P.R.China Research Unit of Precision Diagnosis and Treatment for Gastrointestinal Cancer Chinese Academy of Medical SciencesGuangzhouGuangdong 510060P.R.China

Altered metabolism is a hallmark of cancer,and the reprogramming of energy metabolism has historically been considered a general phenomenon of *** is well recognized that long noncoding RNAs(lncRNAs)regulate energy metabolism in ***,lncRNA-mediated posttranslational modifications and metabolic reprogramming are unclear at *** this review,we summarized the current understanding of the interactions between the alterations in cancer-associated energy metabolism and the lncRNA-mediated posttranslational modifications of metabolic enzymes,transcription factors,and other proteins involved in metabolic *** addition,we discuss the mechanisms through which these interactions contribute to tumor initiation and progression,and the key roles and clinical significance of functional *** believe that an in-depth understanding of lncRNA-mediated cancer metabolic reprogramming can help to identify cellular vulnerabilities that can be exploited for cancer diagnosis and therapy.

关键词： cancer metabolism enzyme long noncoding RNA metabolic reprogramming posttranslational modification

Highly Sensitive Rayleigh Wave Hydrogen Sensors with WO_(3) Sensing Layers at Room Temperature

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Chinese Physics Letters 2011年第11期28卷 56-59页

作者： WANG Cheng FAN Li ZHANG Shu-Yi YANG yue-tao ZHOU Ding-Mao SHUI Xiu-Ji Lab of Modern Acoustics Institute of AcousticsNanjing UniversityNanjing 210093

Rayleigh wave hydrogen sensors based on 128∘YX-LiNbO_(3) substrates with WO_(3) sensing layers operating at room temperature are *** experimental results indicate that the WO_(3) layers obtained by a sol-gel method have much higher sensitivities because the sensing layers produced by the sol-gel method have small grains and high roughness and *** is also confirmed that in the sol-gel method,keeping WO_(3) solutions at low temperature and/or decreasing the viscosity of the solutions can decrease the grain sizes and increase the hydrogen-absorbability of the sensing *** the optimized preparation conditions,the high sensitivity of the hydrogen sensors at room temperature is obtained,in which 1%hydrogen in natural air induces the frequency shift of 72 kHz at the operating frequency of 124.2 MHz.

关键词： Rayleigh roughness method

Effect of magnetic seeding agglomeration on flotation of fine minerals

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Journal of Central South University 2019年第1期26卷 75-87页

作者： yue tao WU Xi-qing DAI Liang School of Minerals Processing and Bioengineering Central South University

Magnetic seeding agglomeration(MSA),i.e.,adding magnetic seeds and a low intensity pre-magnetization for fine agglomeration,was applied to the flotation of coal,pyrite and hematite ore *** analysis and flotation tests highlight that the MSA improved flotation recovery and kinetics of pyrite ore while causing some loss in selectivity,and in the presences of the polyacrylamide for coal and starch for hematite the agglomeration flotation was further strengthened due to the synergetic effect between the flocculants and magnetic *** analyses and calculation confirmed the adsorption of magnetic seeds onto minerals,resulting in a decreased threshold magnetic field intensity for the MSA to *** atomic force microscope(AFM)study found that there exists a long range force between magnetic seeds and minerals,which facilitates the adsorption of magnetic seeds on *** shows both the polyacrylamide and starch adsorbed onto minerals and magnetic seeds,thus acting as the bridging media between minerals and magnetic seeds,intensifying the agglomeration in *** characterization of the MSA was understood by SEM imaging,and models of the MSA were proposed.

关键词： magnetic seeds magnetic seeding agglomeration(MSA) magnetic seeding flotation(MSF) fine agglomeration fine flotation flocculation

Elevated serum growth differentiation factor 15 in multiple system atrophy patients:A case control study

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World Journal of Clinical Cases 2020年第12期8卷 2473-2483页

作者： tao yue Hui Lu Xiao-Mei Yao Xia Du Ling-Ling Wang Dan-Dan Guo Yi-Ming Liu Department of Neurology Qilu HospitalCheeloo College of MedicineShandong UniversityJinan 250012Shandong ProvinceChina Department of Gerontology Zibo Central HospitalZibo 255036Shandong ProvinceChina Department of Ophthalmology Zibo Central HospitalZibo 255036Shandong ProvinceChina Department of Gerontology Jinan Central HospitalCheeloo College of MedicineShandong UniversityJinan 250013Shandong ProvinceChina Department of Neurology Jinan Central Hospital Affiliated to Shandong UniversityJinan 250013Shandong ProvinceChina Department of Neurology Yantaishan HospitalYantai 264001Shandong ProvinceChina

BACKGROUND Multiple system atrophy(MSA) is a serious progressive neurodegenerative disease. Early diagnosis of MSA is very difficult, and diagnostic biomarkers are limited. Growth differentiation factor 15(GDF15) is involved in the differentiation and progression of the central nervous system, and is widely distributed in peripheral blood, which may be a novel biomarker for *** To determine serum GDF15 levels, related factors and their potential diagnostic value in MSA patients, compared with Parkinson’s disease(PD) patients and healthy *** A case-control study was conducted, including 49 MSA patients, 50 PD patients and 50 healthy controls. Serum GDF15 levels were measured by human enzymelinked immunosorbent assay, and the differences between the MSA, PD and control groups were analyzed. Further investigations were performed in different MSA subgroups according to age of onset, sex, clinical subtypes, diagnostic criteria, and disease duration. Receiver-operating characteristic curve analysiswas used to evaluate the diagnostic value of GDF15, especially for the differential diagnosis between MSA and *** Serum GDF15 levels were significantly higher in MSA patients than in PD patients and healthy controls(P = 0.000). Males and those with a disease duration of more than three years showed higher serum GDF15 levels(P = 0.043 and 0.000;respectively). Serum GDF15 levels may be a potential diagnostic biomarker for MSA patients compared with healthy controls and PD patients(cutoff: 470.42 pg/m L, sensitivity: 85.7%, specificity: 88.0%;cutoff: 1075.91 pg/m L, sensitivity:51.0%, specificity: 96.0%;respectively).CONCLUSION Serum GDF15 levels are significantly higher in MSA patients and provide suggestions on the etiology of MSA.

关键词： Multiple system atrophy Parkinson’s disease Serum growth differentiation factor 15 Biomarker Receiver-operating characteristic curve Neurodegenerative disease

Potential quality evaluation approach for the absolute growth years’ wild and transplanted Astragali Radix based on anti-heart failure efficacy

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Chinese Journal of Natural Medicines 2020年第6期18卷 460-471页

作者： LI Ke ZHANG Rui LI Shu-Ying LIU yue-tao LI Ai-Ping LIU Xiao-Jie DU Guan-Hua QIN Xue-Mei Modern Research Center for Traditional Chinese Medicine Shanxi UniversityTaiyuan 030006China College of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan 030006China Key Laboratory of Chemical Biology and Molecular Engineering Ministry Shanxi UniversityTaiyuan 030006China Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

The quality of Astragali Radix(AR) was closely related to the growth period. However, the current commodity grades of AR were only divided by diameter but not directly related to the growth period, which leads to the contradiction between the grade standard and the quality evaluation index. Therefore, solving this problem will be the key for the quality evaluation of AR. The present study established a potential quality evaluation approach for the absolute growth years’ wild Astragali Radix(WAR) and transplanted Astragali Radix(TAR) based on the chemical components and anti-heart failure efficacy through adopting a bare-handed sections approach to rapidly identify the growth years of WAR. In this study, the absolute growth years of WAR were obtained by identifying the growth rings of 1–6 growth years root through the methods. The contents of flavonoids and saponins in 2–6 growth years’ WAR were determined by HPLC-UV-ELSD. The contents of 12 chemical components and the anti-fatigue failure effects of WAR(4-year-old)and TAR were compared on rat models of heart failure induced by doxorubicin. Meanwhile, NMR-based untargeted metabolomics studies were performed to investigate the regulative effects of WAR and TAR. The result shows that the numbers of growth rings were consistent with the actual growth periods of AR. The HPLC-UV-ELSD determination indicated that the content of total flavonoids in WAR was significantly higher than that in TAR. Pharmacodynamics analysis revealed that the effects of WAR on cardiac function parameters(EF, FS and LVIDs), contents of serum CK and BNP were superior to those of TAR. 13 metabolites of heart were identified that had a higher rate of change in WAR group than TAR. Overall, a rapid identification method for the growth years of WAR was established, and the fact that WAR were significantly better than TAR in the heart failure rats was first proved in the paper. This study provided a scientific basis for establishing a novel commodity sp

关键词： Astragali Radix Growth rings Chemical analysis Anti-heart failure

Soil Nutrients in Intensive Agricultural Areas with Different Land-Use Types in Qingzhou County, China

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Pedosphere 2007年第2期17卷 165-171页

作者： ZHAO Geng-Xing LI Xiu- Juan WANG Ri-Yan LI tao yue Yu-De College of Resources and Environment Shandong Agricultural University Tai＇an 271018 （China）. Soil ＆ Fertilizer Working Station of Shandong Jinan 250100 （China） Qingzhou Agricultural Bureau Qingzhou 262500 （China）

On the basis of the data obtained from a field survey, the relationship between land use and soil nutrients was evaluated in Qingzhou County, Shandong Province, China, through a statistical analysis of differences in 17 nutrients in five types of cultivated land. The results showed significant effects (P < 0.05 or P < 0.01) of land-use type on soil organic matter and concentration of macronutrients, secondary nutrients, and micronutrients, as well as total salt and soil pH. In vegetable land, because of the large amounts of fertilizer applied to vegetable crops, the concentrations of most soil nutrients, with exception of available Si and micronutrients, were higher than those in grain cropland. Grain cropland had a significantly lower total salt content (P < 0.01) and tended to have a higher soil pH than vegetable land. Within subtypes of land use, dry land, irrigable land, and open-air vegetable land had the highest coefficient of variation (CV) for available P, whereas protected vegetable land had the highest CV for total N and available S. In general, land-use types had greater impact on macronutrients than on secondary nutrients and micronutrients.

关键词： cultivated land land-use type Qingzhou County soil nutrients