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Condensation Products from β-Keto-δ-valerolactones

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Chinese Chemical Letters 1999年第5期10卷 345-346页

作者： You Ming WANG Zheng Ming li jia feng li (State Key Laboratory of Nankai University, Tianjin 300071) Nankai Univ State Key Lab Tianjin 300071 Peoples R China

Unexpected condensation products from β-keto-δ-valerolactones were obtained. Theirstructures were confirmed by 'HNMR spectrum and elemental analysis.

关键词： Condensation condensation reaction β-keto-δ-valerolactone

A New Condensation Reaction of β-Keto-δ-valerolactone with Substituted Aniline

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Chinese Chemical Letters 1999年第4期10卷 269-270页

作者： You Ming WANG jia feng li Zheng Ming li(State Key Laboratory of Elemento-Organic Chemistry. Nankai University. Tianjin 300071) Nankai Univ State Key Lab Elementoorgan Chem Tianjin 300071 Peoples R China

A new condensation reaction of β-keto-δ-valerolactones was developed. The condensation products are composed of a pair of isomers because of the formation ofintramolecular hydrogen bond. Their structures were confir... 详细信息

关键词： Condensation reaction β-keto-δ-valerolactone intramolecular hydrogen bond

Comparison between electropositive and electronegative cold atmospheric-pressure plasmas:a modelling study

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High Voltage 2016年第2期1卷 81-85页

作者： Ding Xin liu jia feng li Ai Jun Yang Xiao Hua Wang Ming Zhe Rong Michael G.Kong State Key Laboratory of Electrical Insulation and Power Equipment Centre for Plasma BiomedicineXi’an Jiaotong UniversityShaanxi 710049People’s Republic of China Frank Reidy Center for Bioelectrics Department of Electrical&Computer EngineeringOld Dominion UniversityVirginia 23508USA Department of Electrical and Computer Engineering Old Dominion UniversityVirginia 23529USA

Cold atmospheric-pressure He +N2 and He +O2 plasmas are chosen as the representatives for electropositive andelectronegative plasmas, of which the discharge characteristics are studied and then compared to each other by fluidmodels. As the increase of the impurity (N2 or O2) fraction from 0 to 10%, for He + N2 plasmas the electron density andion density increase, the spatiotemporal distributions of electron density, ion density, electron temperature and electrongeneration rate change a little. On contrast, for He + O2 plasmas the electron density decreases, the ion density firstincreases and then decreases, the electron temperature increases in the bulk region, but decreases in the sheath region,and the plasmas transform from g mode to α mode as the significant change of electron generation rate *** electric field is needed in the bulk region to sustain the electronegative plasma, so the electrical characteristics ofHe + O2 plasmas transform form capacitive to resistive with increasing O2 fraction. Meanwhile, the ion-coupling powerincreases dramatically, which can be estimated by a formula based on the electronegativity. A new criterion fordetermining the sheath boundary, |∇E| = 5 kV/cm2, is put forward, which is found suitable for both the electropositive andelectronegative plasmas.

关键词： plasmas positive criterion

Induction of systemic lupus erythematosus syndrome in BALB/c mice by immunization with active chromatin

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Acta Pharmacologica Sinica 2004年第6期25卷 105-109页

作者： Hong li, Yun-yi ZHANG, Ya-nan SUN, Xi-yi HUANG, Yong-feng jia, Duan li2 Department of Pharmacology, Schoolof Pharmacy, Fudan University, Shanghai 200032, China Department of Pharmacology School of Pharmacy Fudan University Shanghai 200032 China

AIM: To establish an animal model for systemic lupus erythematosus (SLE)-like syndrome in mice. METHODS: BALB/c mice were immunized with active chromatin isolated from ConA-actived syngeneic spleno-lymphocytes. Plasma samples of mice were tested by enzyme-linked immunosorbent assays (EliSA) for the presence of IgG anti-dsDNA, -ssDNA, and anti-histone antibodies. Tumor necrosis factor-α (TNF-α) in serum was measured by EliSA. Spleno-lymphocyte proliferation assays and the levels of interferon-γ (IFN-γ) in supernatants were tested respectively. Proteinuria was measured. Kidneys were examined by direct immunohistochemical method and light microscopy. RESULTS: Anti-ds DNA, ssDNA, and histone antibodies were induced in active chromatin-immu- nized mice, the proliferation response of splenocytes to ConA and LPS were reduced, levels of interferon-γ in supernatants and TNF-α in serum were lowered. Lupus nephritis was assessed by the presence of Ig deposits, glomerular pathology and proteinuria. CONCLUSION: The active chromatin-induced SLE-like mouse model was similar to idiopathic SLE in human.

关键词： systemic lupus erythematosus chromatin autoantibody tumor necrosis factor interferon type II B-lymphocytes T-lymphocytes female enzyme-linked immunosorbent assay

从判断到识别的定性映射模型与模糊人工神经元

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模式识别与人工智能 2006年第1期19卷 35-46页

作者：冯嘉礼上海海事大学信息工程学院计算机系上海200135

将基于属性量-质特征转化的性质命题判断抽象为一个以定性基准为参量的动态定性映射,给出定性基准分别为一个区间、区间向量和 n 维超平行体网格的定义,讨论加权 w 对定性基准的几何意义,定性映射和人工神经元的关系,以及(性质判断的)... 详细信息

将基于属性量-质特征转化的性质命题判断抽象为一个以定性基准为参量的动态定性映射,给出定性基准分别为一个区间、区间向量和 n 维超平行体网格的定义,讨论加权 w 对定性基准的几何意义,定性映射和人工神经元的关系,以及(性质判断的)定性映射转化为(模式)识别映射的机制和条件.指出.加权 w 的实质是对定性基准中的 n 维超平行体实施一个旋转变换.因人工神经元可看作是对 n 维超平行体的一个面实施加权 w 内积旋转变换后的形式,故是(加权 w 内积变换)定性映射的一个特例.当定性基准中 n 维超平行体的所有边长都趋近于零时,以(近)零边长的 n 维超平行体为基准的定性映射转化为一个向量的判断或搜索映射,并可对任一可转化为一个向量的模式进行识别.此外,本文还提出了属性量-质转化程度函数的概念和一种导致定性基准边界模糊化的机制,指出,若用某个模糊化的转化程度函数代替定性映射进行判断和识别,则得到一种模糊判断和识别,并以一系列实例证实了定性映射和转化程度函数方法的实用性.

关键词：性质命题判断定性映射 ω_内积变换转化程度函数人工神经元模糊隶属度函数模式识别

Impacts of a Large-scale Adaptive Blending Scheme for CMA-MESO on Regional Forecasts-A Case Study of Typhoon Haima

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Journal of Tropical Meteorology 2021年第4期27卷 330-345页

作者： feng jia-li GAO Yan XIA Xin MA Yu-long SUN jian li Yuan CHEN Dong-mei WAN Qi-lin Guangdong-Hong Kong-Macao Greater Bay Area Weather Research Center for Monitoring Warning and Forecasting/Shenzhen Institute of Meteorological Innovation ShenzhenGuangdong 518045 China CMA Earth System Modelling and Prediction Centre China Meteorological AdministrationBeijing 100081 China

Large-scale atmospheric information plays an important role in the regional model for the forecasts of weather such as tropical cyclone(TC).However,it is difficult to be fully represented in regional models due to domain size and a lack of observation data,particularly at sea used in regional data *** analysis has been developed and implemented in regional models to reintroduce large-scale information from global model to regional *** of the impact of this large-scale blending scheme for the Global/Regional Assimilation and PrEdiction System(CMA-MESO)regional model on TC forecasting is limited and this study attempts to further progress by examining the adaptivity of the blending scheme using the two-dimensional Discrete Cosine Transform(2D-DCT)filter on the model forecast of Typhoon Haima over Shenzhen,China in 2016 and considering various cut-off *** showed that the error of the 24-hour typhoon track forecast can be reduced to less than 25 km by applying the scale-dependent blending scheme,indicating that the blending analysis is effectively able to minimise the large-scale bias for the initial *** improvement of the wind forecast is more evident for u-wind component according to the reduced root mean square errors(RMSEs)by comparing the experiments with and without blending ***,the higher equitable threat score(ETS)provided implications that the precipitation prediction skills were increased in the 24h forecast by improving the representation of the large-scale feature in the CMA-MESO ***,significant differences of the track error forecast were found by applying the blending analysis with different cut-off wavelengths from 400 km to 1200 km and the track error can be reduced less than by 10 km with 400 km cut-off wavelength in the first 6h *** highlighted that the blending scheme with dynamic cut-off wavelengths adapted to the development of different TC systems is ne

关键词： blending analysis tropical cyclone track forecast tropical cyclone typhoon large-scale feature regional model

Effect of initial deposition behavior on properties of electroless Ni-P coating on ZK60 and ME20 magnesium alloys

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Transactions of Nonferrous Metals Society of China 2021年第8期31卷 2307-2322页

作者： li feng You-wei ZHANG Chen WEN Si-zhen li jia-feng li De CHENG Jing-ying BAI Qing-xin CUI li-gong ZHANG Beijing Spacecraft China Academy of Space TechnologyBeijing 100194China

The composition of magnesium alloys is greatly associated with initial deposition behavior of electroless Ni-P ***,the initial deposition behavior of electroless Ni–P coatings on ZK60 and ME20 alloys was *** results indicated that differences in the alloy compositions significantly influenced the initial deposition process and the adhesive strength,corrosion resistance,and crystal *** initial deposition of coatings on ZK60 and ME20 alloys preferentially occurred on the *** precipitates in ZK60 alloy had higher chemical activity after HF activation and controlled the initial deposition rate of the *** initial deposition rate of the coating on ME20 alloy mainly depended on the density of the Mg F2 film formed by HF activation rather than on the *** to differences in the initial deposition process,the coating on ZK60 alloy had higher adhesive strength and better corrosion resistance than that on ME20 *** coatings on ZK60 and ME20 alloys mainly had crystalline structures,and the coating on ME20 alloy had also a slight microcrystalline structure.

关键词： ZK60 magnesium alloys ME20 alloys electroless Ni plating initial deposition adhesive strength corrosion resistance

Radiofrequency ablation combined with transarterial chemoembolization for unresectable primary liver cancer

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Chinese Medical Journal 2009年第8期122卷 889-894页

作者： WANG Yue-hua liU jia-feng li Fei li Ang liU Qiang liU Dong-bin liU Dian-gang WANG Ya-jun Department of General Surgery Xuanwu Hospital Capital Medical University Beijing 100053 China

Background Radiofrequency ablation （RFA） followed by transarterial chemoembolization （TACE） for unresectable primary liver cancer （PLC） has not been widely discussed. In this study, the outcome of the combination of RFA with TACE was retrospectively evaluated. Methods From May 2003 to March 2008, 127 consecutive PLC patients with a median age of 56.4＋8.8 years underwent RFA plus TACE. All patients were deemed to have unresectable PLC based on their tumor characteristics. The maximal diameter of the tumor was between 1.5 cm and 10.0 cm. Twenty-six cases with small （〈3.0 cm）, 33 with medium （3.1-5.0 cm）, and 68 with large （〉5.0 cm） tumors were included in this study. RFA was performed using a RITA Medical Systems expandable electrode device, which was followed by first-time TACE administration one to two months later. Results Technical success of RFA was achieved in all 127 patients with no severe treatment-related complications. RFA was performed percutaneously in 16 （13.5%） cases, by laparoscopic approach in 19 （15.7%）, and through laparotomy in the remaining 92 （72.4%）. RFA response was classified as complete ablation in 48 cases, nearly complete ablation in 28, and partial ablation in 51. The total 1-, 2-, and 3-year survival rates after RFA were 83.1%, 55.7%, and 43.7%, respectively. The survival rates at 3 years were 78.6%, 28.1%, and 0 for complete ablation, nearly complete ablation, or partial ablation groups, respectively. Three-year disease-free survival rates for the complete ablation and nearly complete ablation groups were 50.3% and 21.3%, respectively. RFA response and liver function were significant variables influencing survival time as analyzed using the Cox regression model. Conclusion RFA could be the first-line exterminate treatment for unresectable PLC, and TACE following RFA may assist in eradicatinq the peripheral viable tissue and micro-metastasis.

关键词： liver neoplasms interventional radiology radiofrequency ablation therapeutic chemoembolization

Understanding the local structure and thermophysical behavior of Mg-La liquid alloys via machine learning potential

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 439-449页

作者： jia Zhao Taixi feng Guimin Lu National Engineering Research Center for Integrated Utilization of Salt Lake Resource East China University of Science and TechnologyShanghai 200237China Joint International Laboratory for Potassium and lithium Strategic Resources East China University of Science and TechnologyShanghai 200237China

The local structure and thermophysical behavior of Mg-La liquid alloys were in-depth understood using deep potential molecular dynamic(DPMD) simulation driven via machine learning to promote the development of Mg-La alloys. The robustness of the trained deep potential(DP) model was thoroughly evaluated through several aspects, including root-mean-square errors(RMSEs), energy and force data, and structural information comparison results;the results indicate the carefully trained DP model is reliable. The component and temperature dependence of the local structure in the Mg-La liquid alloy was analyzed. The effect of Mg content in the system on the first coordination shell of the atomic pairs is the same as that of temperature. The pre-peak demonstrated in the structure factor indicates the presence of a medium-range ordered structure in the Mg-La liquid alloy, which is particularly pronounced in the 80at% Mg system and disappears at elevated temperatures. The density, self-diffusion coefficient, and shear viscosity for the Mg-La liquid alloy were predicted via DPMD simulation, the evolution patterns with Mg content and temperature were subsequently discussed, and a database was established accordingly. Finally, the mixing enthalpy and elemental activity of the Mg-La liquid alloy at 1200 K were reliably evaluated,which provides new guidance for related studies.

关键词： magnesium-lanthanum liquid alloys local structure macroscopic properties thermodynamic behavior deep potential mo-lecular dynamic simulation