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Absorption Cross Section of Static Einstein-Maxwell Dilation Axion Black Hole for Scalar Particles

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Communications in Theoretical Physics 2007年第4期47卷 665-668页

作者： LIU Chang-qing jing Ji-Liang Institute of Physics and Department of Physics Hunan Normal University Changsha 410081 China

The absorption cross section of the static Einstein-Maxwell dilaton axion （EMDA） black hole for scalar particles is investigated. It is shown that the ratio of the absorption cross section of the EMDA black hole to that of the Schwarzschild black hole decreases as the absolute value of the dilaton increases, and it becomes zero as the dilaton tends to its extremal value. It is also shown that the absorption cross section decreases as both the v and the absolute value of the dilaton increase, and it decreases as the mass of the particle decreases.

关键词： absorption cross section black hole dilaton

Cross-layer optimized Chord protocol for separated ring convergence in MANET

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The Journal of China Universities of Posts and Telecommunications 2009年第4期16卷 84-90页

作者： MEI jing-qing JI Hong LI Ting Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

An optimized Chord protocol is proposed to solve the convergence problem for separated Chord rings over mobile Ad-hoc networks （MANETs）. This protocol exploits the information of topological neighbors in routing layer by utilizing a cross-layer design, and periodically detects whether there is any neighbor node that belongs to an alien Chord ring by sending detecting packets. The detection will be confirmed and then the corresponding predecessor node will be found out to initialize convergence of the Chord rings. Theoretical analysis and experiment results show that the proposed algorithm can detect separated Chord rings and implement the convergence process efficiently, and that a significant improvement in the successful lookup ratio is also achieved at an acceptable overhead for the system maintenance. Moreover, the proposed protocol can ensure the stability and scalability of the system.

关键词： convergence Chord mobile Ad-hoc network (MANET) cross-layer

Query routing mismatch alleviation architecture for P2P file lookup in MANETs

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The Journal of China Universities of Posts and Telecommunications 2011年第4期18卷 111-117页

作者： MEI jing-qing JI Hong LI Yi Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

A cross-layer optimized query routing mismatch alleviation （QRMA） architecture is proposed to mitigate the problem of query routing mismatch （QRM） phenomenon between the structured peer to peer （P2P） overlay and the routing layer in mobile Ad-hoc networks （MANETs）, which is an important issue that results in the inefficiency of lookup process in the system. Explicated with the representative Chord protocol, the proposal exploits the information of topologic neighbors in the routing layer of MANETs to find if there is any optimized alternative next hop in P2P overlay during conventional lookup progress. Once an alternative next hop is detected, it will take the shortcut to accelerate the query procedure and therefore alleviate the QRM problem in scalable MANETs without any assistance of affiliation equipments such as GPS device. The probability of finding out such an alternative node is formulated and the factors that could increase the chance are discussed. The simulation results show that the proposed architecture can effectively alleviate the QRM problem and significantly improve the system performance compared with the conventional mechanism.

关键词： query routing mismatch P2P overlay Chord MANETs

DETACHED EDDY SIMULATION OF HYDRAULIC CHARACTERISTICS ALONG THE SIDE-WALL AFTER A NEW ARRANGEMENT-SCHEME OF THE SUDDEN LATERAL ENLARGEMENT AND THE VERTICAL DROP

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Journal of Hydrodynamics 2011年第5期23卷 669-675页

作者： LI Guo-jing DAI Guang-qing YANG qing MA Xu-dong State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University Chengdu 610065 China

In order to study the cavitation damage in a side-wall when a sudden lateral enlargement and a vertical drop are imposed at the radial gate, a new arrangement-scheme is proposed, where the sudden lateral enlargement and the vertical drop can be imposed at the outlet of the gate chamber. The hydraulic characteristics along the side-wall are simulated by the detached eddy simulation and the Volume Of Fluid （VOF） method. The numerical results agree well with those of experiment. The experimental and numerical results show that the flow condition is smooth with only a weak water-wing appearing behind the lateral cavity, and the length of the lateral cavity becomes longer and is mainly affected by the size of the lateral enlargement and the zone of negative pressure after the water impacts the side-wall would disappear. The hydraulic characteristics of the new arrangement-scheme are beneficial to the prevention of the cavitation damage in the side-wall and the Detached Eddy Simulation （DES） with the VOF method can well predict the hydraulic characteristics after the new arrangement-scheme of the sudden lateral enlargement and the vertical drop.

关键词： model test aeration to prevent cavitation damage realizable k - ε turbulent model Detached Eddy Simulation (DES) Volume Of Fluid (VOF) method

In-line Plasma-induced Graft-copolymerization of Pentaerythritol Triacrylate onto Polypropylene

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Chinese Journal of Polymer Science 2018年第8期36卷 979-983页

作者： Gui-Qiu Ma Guan-Kai Sun Zhe Ma jing-qing Li jing Sheng Department of Polymer Material Science and Engineering Institute of Advanced Polymer MaterialsSchool of Material Science and EngineeringTianjin Key Laboratory of Composite and Functional MaterialsTianjin University

Pentaerythritol triacrylate （PETA） was successfully grafted onto the plasma-treated isotactic polypropylene （iPP） via the in situ melt processing. The X-ray photoelectron spectroscopy （XPS） results showed that the hydroxyl and carbonyl groups, and peroxides could be generated via plasma treatment. The content of free radical in plasma-treated iPP （PiPP） was measured by 2,2-diphenyl-1- picrylhydrazyl （DPPH）. It was found that the resulting peroxides induced the grafting copolymerization of PETA onto iPP, and the grafted PETA promoted the formation of β-crystal in PiPP, which was evidenced by Fourier transform infrared spectroscopy （FTIR）, differential scanning calorimetry （DSC） and wide-angle X-ray diffraction （WAXD） measurements, respectively.

关键词： Plasma treatment Melt processing Graft copolymerization Pentaerythritol triacrylate

Single-cell transcriptomics of murine mural cells reveals cellular heterogeneity

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Science China(Life Sciences) 2021年第7期64卷 1077-1086页

作者： Ya-Na Guan Yue Li Moom Roosan qing jing Shanghai Jiao Tong University School of Medicine(SJTUSM)&CAS Key Laboratory of Tissue Microenvironment and Tumor Shanghai Institute of Nutrition and HealthChinese Academy of Sciences(CAS)Shanghai 200031China Chapman University IrvineCA 92618USA

Mural cells(MCs)wrap around the endothelium,and participate in the development and homeostasis of *** have been reported as heterogeneous population morphologically and ***,the transcriptional heterogeneity of MCs was rarely *** this study,we illustrated the transcriptional heterogeneity of MCs with different perspectives by using publicly available single-cell dataset ***,MCs are transcriptionally different from other cell types,and ligand-receptor interactions of different cells with MCs ***-clustering of MCs identified five distinct *** heterogeneity of MCs in tissues was reflected by MC coverage,various distribution of MC subclusters,and ligand-receptor interactions of MCs and parenchymal *** transcriptomic diversity of MCs revealed in this article will help facilitate further research into MCs.

关键词： mural cells single-cell analysis heterogeneity

Study on Ductility Dip Cracking susceptibility in Filler Metal 82 during welding

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Frontiers of Materials Science 2011年第2期5卷 203-208页

作者： jing-qing CHEN Hao LU Wei CUI School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

In this paper, Ductility Dip Cracking （DDC） susceptibility in Inconel600 companion Filler Metal 82 （FM82） under different stress states is investigated. Inconel600 is a Ni-Cr-Fe alloy with excellent resistance to general corrosion, localized corrosion, and stress corrosion, which has been widely used in nuclear power plants. However, the companion FM82 has been shown to be susceptible to DDC in welding process. To resolve the problem, this work is mainly focused on evaluating DDC susceptibility in FM82 in welding process. First of all, Strain to Fracture （STF） test is used to achieve the DDC criterion under simple stress state, and the formation mechanism of DDC was explained. Real welding is a process with complex stress state. Later, to get the DDC susceptibility under complex stress state, models about multi-pass welding were built up by means of finite element method. According to numerical simulation results, relationship of deformation and temperature history is achieved. Moreover, susceptible locations and moments could be determined associated with STF results. The simulation results fairly agree with welding experiment from another research.

关键词： Ductility Dip Cracking (ODC) welding inconel600 numerical simulation

Components of Volatile Oil from Water-caltrop and Their Anti-tumor Effect in vitro

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Chemical Research in Chinese Universities 2009年第1期25卷 56-59页

作者： ZHAO Wen-jing NIU Feng-lan LI jing DONG qing HUANG Zhan-you School of Public Health Jilin University Changchun 130021 P. R. China

The volatile oil was extracted from water caltrop by steam distillation; it was then analyzed by GC-MS to obtain 16 components, 8 of which were identified. Apocynin was the most abundant one, accounting for 81.41% of the total oil. The in vitro inhibitory effects of the volatile oil on SMMC-7721, MCF-7, Hela, HL-60 cells, and human peripheral blood mononuclear cells（PBMC） were investigated via the MTT method. The morphological changes of the tumor cells were observed and the apoptosis of HL-60 cells was detected by flow cytometry. The proliferation of the tumor cells could be significantly inhibited and the apoptosis of HL-60 cells could be induced by the volatile oil. The proliferation inhibition effect of the volatile oil on HL-60 tumor cells and the induction of the apoptosis of ilL-60 cells had dose-dependent feature.

关键词： Water caltrop Volatile oil Tumor Apoptosis

Effect of preoperative transcatheter arterial chemoembolization on proliferation of hepatocellular carcinoma cells

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World Journal of Gastroenterology 2007年第33期13卷 4509-4513页

作者： En-Hua Xiao jing-qing Li Jie-Fu Huang Department of Radiology the Second Xiangya Hospital Central South University Changsha 410011 Hunan Province China Liver Cancer Research Center Sun Yat-sen University of Medical Sciences Guangzhou 510060 Guangdong

AIM： To evaluate the effect of preoperative transcatheter arterial chemoembolization （TACE） on proliferation of hepatocellular carcinoma （HCC） cells. METHODS： A total of 136 patients with HCC underwent liver resection. Of 136 patients, 79 patients received 1 to 5 courses of TACE prior to liver resection （TACE group）, who were further subdivided into four groups： Group A （n = 11） who received i to 4 courses of chemotherapy alone; Group B （n = 33） who received i to 5 courses of chemotherapy combined with iodized oil; Group C （n = 23） who received i to 3 courses of chemotherapy combined with iodized oil and gelatin sponge; and Group D （n = 12） who received 1 to 3 courses of chemotherapy combined with iodized oil, ethanol and gelatin sponge. The other 57 patients only received liver resection （non- TACE group）. The expressions of Ki-67 and proliferating cell nuclear antigen （PCNA） protein were detected in the liver cancer tissues by immunohistochemical method. RESULTS： The Ki-67 protein expression was significantly lower in Groups C and D as compared with non-TACE group （31.35% ± 10.85% vs 44.43% ± 20.70%, 30.93% ± 18.10% vs 44.43% ± 20.70%, respectively, P 〈 0.05）. The PCNA protein expression was significantly lower in Groups C and D as compared with non-TACE group （49.61% ± 15.11% vs 62.92% ± 17.21%, 41.16% ± 11.83% vs 62.92% ± 17.21%, respectively, P 〈 0.05）. The Ki-67 protein expression was significantly higher in Group A as compared with non-TACE group （55.44% ± 13.72% vs 44.43% ± 20.70%, P 〈 0.05）. The PCNA protein expression was significantly higher in Groups A and B as compared with non-TACE group （72.22% ± 8.71% vs 62.92% ± 17.21%, 69.91% ± 13.38% vs 62.92% ± 17.21%, respectively, P 〈0.05）. CONCLUSION： Preoperative multi-material TACE suppresses the proliferation of HCC cells, while a single material embolization and chemotherapy alone enhance the proliferation of HCC cells.

关键词： Hepatocellular carcinoma Transcatheter arterial chemoembolization Proliferating cell nuclear antigen Ki-67