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Two-dimensional Irreducible Algebraic Semigroups

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Acta Mathematica Sinica,English Series 2018年第3期34卷 532-541页

作者： duo li Yau Mathematical Sciences Center Tsinghua University

We study two-dimensional irreducible projective smooth algebraic semigroups. Minimal surface semigroups with Kodaira dimension at most one are partially classified. We also calculate the local dimension of the moduli ... 详细信息

关键词： Algebraic semigroup algebraic surface

Is it really good for you to eat fat as much as you could?

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Science China(life Sciences) 2018年第3期61卷 363-364页

作者： duo li Institute of Nutrition & Health Qingdao University

High carbohydrate （CHO） intake was associated with higher risk of total mortality, whereas high intake of total fat and individual types of fat were related to lower total mortal- ity. Total fat and types of fat were not associated with car- diovascular disease, myocardial infarction, or cardiovascu- lar disease mortality, whereas saturated fat had an inverse association with stroke. These results were based on data from food frequency questionnaires （FFQ） of 135,335 indi- viduals aged 35-70 years （enrolled between Jan 1, 2003, and March 31, 2013） in 18 countries with a median follow-up of 7.4 years （IQR 5.3-9.3）, currently published in The Lancet, 2017, doi： 10.1016/S0140-6736（17）32252-3.

关键词：脂肪 doi 死亡类型疾病

Effect of conical intersection of benzene on non-adiabatic dynamics

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Chinese Physics B 2022年第8期31卷 367-371页

作者： duo-duo li Song Zhang State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China

The effect of conical intersection on the excited dynamics of benzene is studied by ab initio theory of electronic structure,which provides an important insight into photophysical and photochemical *** on the CASSCF(6,6)/6-31+G(d,p)method,the topological structures of conical intersections S_(1)/S and S_(2)/S_(1)of benzene,as well as the optimal structures of the ground state(S)and excited states(S_(1),S_(2)),are *** energy minima of the S_(1)state and S_(2)state are estimated at 4.608 e V and 6.889 e V,*** addition,the energy values of the conical intersections of S_(1)/S and S_(2)/S_(1)are predicted to be 5.600 e V and 6.774 e *** to the topological structures and energy values of the S_(2)/S_(1)and S_(1)/S conical intersections,the photophysical behavior of benzene excited to the S_(2)state and the effects of the S_(2)/S_(1)and S_(1)/S conical intersections are discussed in detail.

关键词： conical intersection nonadiabatic dynamics ultrafast relaxation quantum chemical calculations

Controllable synthesis of high loading liFePO_4/C nanocomposites using bimodal mesoporous carbon as support for high power li-ion battery cathodes

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Journal of Energy Chemistry 2013年第6期22卷 907-913页

作者： Fei Cheng duo li Anhui Lu Wencui li State Key Laboratory of Fine Chemicals School of Chemical Engineering Faculty of Chemical Environmental and Biological Science and Technology Dalian University of Technology

Mesoporous liFePO4/C composites containing 80 wt% of highly dispersed liFePO4 nanoparticles(4-6 nm) were fabricated using bimodal mesoporous carbon(BMC) as continuous conductive networks. The unique pore structure of BMC not only promises good particle connectivity for liFePO4, but also acts as a rigid nano-confinement support that controls the particle size. Furthermore, the capacities were investigated respectively based on the weight of liFePO4 and the whole composite. When calculated based on the weight of the whole composite, it is 120 mAh·g-1at 0.1 C of the high loading electrode and 42 mAh·g-1at 10 C of the low loading electrode. The electrochemical performance shows that high liFePO4 loading benefits large tap density and contributes to the energy storage at low rates, while the electrode with low content of liFePO4 displays superior high rate performance, which can mainly be due to the small particle size, good dispersion and high utilization of the active material, thus leading to a fast ion and electron diffusion.

关键词： liFePO4 high loading fast ion diffusion high rate performance lithium-ion batteries

Projective Bundles and Blowing-Ups Ⅱ

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Algebra Colloquium 2024年第1期31卷 57-62页

作者： duo li School of Mathematics(Zhuhai) Sun Yat-Sen University ZhuhaiGuangdong 519082China

We study the blowing-up X of a smooth projective variety X along a smooth center B that is equipped with a projective bundle structure over a variety *** the Picard number p(X)is 1 and dim X is at most 4,we classify a... 详细信息

关键词： blowing-up projective bundle Fano bundle

Steady-State Reversed Shear Mode Sustained by Lower Hybrid Current Drive

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Chinese Physics Letters 1998年第8期15卷 582-584页

作者： li duo-chuan li You-yi Institute of Plasma Physics Chinese Academy of SciencesHefei 230031

A simple model is presented for analysis of radial diffusion of current during lower hybrid current drive(LHCD).Considering the effect of radial diffusion of LH driven current and the bootstrap current,a steady-state reversed shear magnetic configuration can be sustained simply by LHCD and a such case on HT-7U tokamak was calculated as an example.

关键词： reversed diffusion sustained

Capacity Titration Technique for Determining the Solid Diffusion Coefficient of Intercalary Species within Insertion-host Materials

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Chinese Chemical Letters 2005年第8期16卷 1077-1080页

作者： Xin Cun TANG Tian duo li College of Chemistr and Chemical Engineering Central South University Changsha 410083 Shandong Institute of light Industry Jinan 250100

In this paper, the capacity titration technique （CT technique） was developed on basis of the RPG （ratio of potentio-charge capacity to galvano-charge capacity） method to continuously determine the solid diffusion coefficient D of the intercalary species within insertion-host materials with a small voltage region. The linear equations of D vs. q （value of ratio of the potentio-charge capacity to the galvano-charge capacity） were given in different range of q. By the CT technique,the li^＋ solid diffusion coefficients D within liMn2O4 at different voltages were determined. The results showed that the values of D varied from 3.447×10^-9 cm^2/s to 7.60×10^-11 cm^2/s in the voltage range of charge from 3.3V to 4.3V as a function of voltage with “W” shape.

关键词： Capacity titration technique li^+ solid diffusion coefficient liMn2O4.

Key findings of the 2016 symposium on the frontiers of chemical science and engineering： Environment and sustainable development

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Frontiers of Chemical Science and Engineering 2017年第3期11卷 305-307页

作者： Zhongming Lu duo li John C. Crittenden School of Environment Beijing Normal University Beijing 100875 China Crittenden and Associates Beijing 100102 China Brook Byers Institute for Sustainable Systems School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta GA 30332-0355 USA

There were 30 speakers and the proceedings contained 28 abstracts that discussed the start-of-the art applications of sustainable chemical engineering [1]. We summarized topics that were discussed in the 28 abstracts using the non-negative matrix factorization （NMF） algorithm. The ＂topics＂ were synthesized without reading the abstracts. Here we will not discuss the algorithm of NMF in detail because of the space limitation and please refer to references for the description of NMF [2,3]. Topic modeling will be more valuable as the number of the abstracts increases.

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Heavy metal accumulation of urban domestic rubbish compost in turfgrass by EDTA chelating

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Journal of Environmental Sciences 2005年第5期17卷 813-816页

作者： duo li-an GAO Yu-bao ZHAO Shu-lan College of life Sciences Nankai University Tianjin 300071 China College of Chemistry and life Sciences Tianjin Normal University Tianjin 300074China

Seven kinds of heavy metal accumulation of rubbish compost in turfgrass by EDTA chelating were investigated. With EDTA application, heavy metal accumulation by two species of turfgrass was increased significantly. The enrichment coefficients of Lolium perenne L（L） and Festuca arundinacea L（F） to Cr reached 9.4.5 and 6.15 respectively. In the range of EDTA dosages given, heavy metal accumulation in turfgrass increased with increasing EDTA level. There were significant differences in remediation of different metals by applying EDTA. L had high ability to accumulate Cr, Cd, Ni and Zn, showing better remediation to heavy metals of rubbish compost. In contrast, F showed high ability to accumulate Cr, Ni, Cu and Zn. Low EDTA level increased aboveground net primary production （ANP） of turfgrass, but EDTA would considerably inhibit it when EDTA was higher than 20 mmol/kg. The results demonstrated that the optimum dosage of EDTA for remediating heavy metals in rubbish compost by turfgrass was between 10 mmol/kg and 20 mmol/kg.

关键词： domestic rubbish compost EDTA turfgrass heavy metal accumulation