维普中文期刊产品整合服务
351篇 您的检索式:作者名="Modern"
    题名 作者 年代 出处 被引量
1Results of Carbon Ion Radiotherapy for Skin Carcinomas in 33 Patients显示文摘Purpose: To evaluate outcome and toxicity after carbon ion radiotherapy (RT) in skin carcinomas. Patients and Methods: Between November 2006 to September 2008,H.Zhang1,2, S.Li3, X.H.Wang 4, Q.Li1,2, S.H.Wei3, L.Y.Gao4, W.P.Zhao1,2, Z.G.Hu1, R.S.Mao1, H.S.Xu1, H.Y.Cai 4, Y.Y.Yue3, G.Q.Xiao1 1Institute of Modern Physics, CAS, Lanzhou 730000, China 2 Key Laboratory of Heavy Ion Radiation Medicine of Gansu Province, Lanzhou 730000, China 3 The General Hospital of Lanzhou Command, Lanzhou 730050, China 4 Tumor Hospital of Gansu Province, Lanzhou 730050, China 2009生物物理学报2009,25,S1:23
2A reconstruction method of porous media integrating soft data with hard data显示文摘The three-dimensional reconstruction of porous media is of great significance to the research of mechanisms of fluid flow. The real three-dimensional structural data of porous media are helpful to describe the irregular topologic structures in porous media. The reconstruction of porous media will be inaccurate while only hard data or no conditional data are available. Reconstructed results can be more accurate, using soft data during reconstruction. Integrating soft data with hard data, a method based on multiple-point geostatistics (MPS) is proposed to reconstruct three-dimensional structures of porous media. The variogram curves and permeability, computed by lattice Boltzmann method (LBM), of the reconstructed images and the target image obtained from real volume data were compared, showing that the structural characteristics of reconstructed porous media using both soft data and hard data as conditional data are most similar to those of real volume data.LU DeTang1,2,3, ZHANG Ting1,2,3, YANG JiaQing1,2,3, LI DaoLun1,2,3 & KONG XiangYan1,2,3 1 Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China 2 Research Center of Oil and Natural Gas, University of Science and Technology of China, Hefei 230027, China 3 Key Laboratory of Software in Computing and Communication of Anhui Province, University of Science and Technology of China, Hefei 230027, China 2009Chinese Science Bulletin2009,54,11:16
3Study on lithogeochemistry of Middle Jurassic basalts from southern China represented by the Fankeng basalts from Yongding of Fujian Province显示文摘There exists an E-W trending Middle Jurassic volcanic zone in southern China. The Fankeng basalts in the Yongding basin of Fujian Province are considered to be a typical example. The Fankeng basalts have TiO2 contents in the range of 1.92%-3.21%. They are classified as high-Ti basalts. They also have higher total Fe (averaging FeO* = 11.09%). The Middle Jurassic Fankeng basalts from southwestern Fujian have obvious distinctive lithogeochemical features from early Cre- taceous basalts from southeastern coast of China. They have higher HFSE, such as Th, Nb, Ta, Zr and Ti. Their element ratios related with HFSE, such as Zr/Ba, La/Nb, La/Ta ,Zr/Y, Ti/Y, Ba/Nb, K/Ti and Rb/Zr are similar to those of OIB. The most samples have ε Nd(T) of-0.70-0.24, which are near chondrite. Some samples have higher ε Nd(T) of 1.87-3.55.Therefore, these basaltic magmas might be derived from depleted asthenospheric mantle. The lithogeochemical characteristics of the Fankeng basalts may be caused by interaction between asthenosphere and lithosphere at the time. The (Early-) Middle Jurassic basalts and gabbros from southeastern Hunan, southern Jiangxi and northern Guangdong provinces show similar geochemical features to those of the Fankeng basalts from the Yongding of Fujian. Occurrence of these OIB-type basalts in the area may be regarded as the petrological mark of upwelling of asthenosphere at the time. Upwelling of asthenosphere has led to tectonic extension and the formation of rifted basin in the area.ZHOU Jincheng1,2, JIANG Shaoyong1,2, WANG Xiaolei1,2, YANG Jinghong 1,2 & ZHANG Mengqun 3 1. State Key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 210093, China 2. Department of Earth Sciences, Nanjing University, Nanjing 210093, China 3. Modern Analysis Center, Nanjing University, Nanjing 210093, China 2006Science China Earth Sciences2006,49,10:14
4Recent progress of solar physics research in China显示文摘Owing to the largely improved facilities and working conditions,solar physics research in China has recently shown marked development.This paper reports on the recent progress of solar physics research in China's Mainland,mainly focusing on several hot issues,including instrumentations,magnetic field observations and research,solar flares,filaments and their eruptions,coronal mass ejections and related processes,as well as active regions and the corona,small-scale phenomena,solar activity and its predictions.A vision of the future is also described.Cheng Fang 1 School of Astronomy and Space Science,Nanjing University,Nanjing 210093,China 2 Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University),Ministry of Education,China 2011Research in Astronomy and Astrophysics2011,11,12:14
5微波场中甲烷部分氧化制合成气 Ⅱ.Co/ZrO_2催化剂在微波场中的升温行为及催化活性显示文摘近年来,甲烷部分氧化制合成气(POM)的研究一直十分活跃[1,2].前文报道了用于甲烷部分氧化制合成气的镍基催化剂(Ni/La2O3)在微波场中的升温行为和催化活性[3],发现在达到相同的CH4转化率时,微波活化方式下的催化剂床层温度比常规加热低得多...Bi Xianjun 1, Xie Xiaoguang 2, Duan Aihong 1, Wang Zhen 3, Hong Pinjie 3, Dai Shushan 3 (1 Department of Chemistry, Yunnan Normal University, Kunming 650092 2 Modern Biological Center, Yunnan University, Kunming 650091 3 Department of Chemi 1998催化学报1998,19,5:13
6Down-Regulation of CD44 Contributes to the Differentiation of HL-60 Cells Induced by ATRA or HMBA显示文摘CD44 is highly expressed in human acute myeloid leukemia (AML) cells. Some experiments had shown that it was possible to reverse differentiation blockage in AML cells by CD44 ligation with specific antibodies, indicating that CD44 was closely related to the differentiation of leukemia cells. The differentiation of acute promyelocytic leukemia cell line HL-60 cells could be induced by all trans-retinoic acid (ATRA) and hexamethylene bisacetamide (HMBA), but so far the mechanism was not demonstrated clearly. In the present study, we investigated whether ATRA or HMBA induced the growth arrest of HL-60 cells by down-regulating the expression of CD44. The results indicated that the proliferation of HL-60 cells was obviously inhibited and the differentiation was induced by both ATRA and HMBA. The decreased expression of CD44 and cyclin E mRNA, and the increased expression of p27 and p21 at mRNA levels were observed. Furthermore, there was a negative correlation between the expression of CD44 and p27. It was concluded that ATRA and HMBA played a role in the differentiation induction of HL-60 cells, which was mediated by the down-regulation of CD44, accompanied by down-regulation of cyclin E, and up-regulation of p27 and p21 mRNA.Jianing Liu1, Gaofeng Bi1, Pei’e Wen1, Weihua Yang1, Xia Ren1, Tianhua Tang1, Chao Xie1, Wei Dong1 and Guosheng Jiang1, 21Department of Hemato-oncology, Institute of Basic Medicine, Shandong Academy of Medical Sciences Key Laboratory for Modern Medicine and Technology of Shandong Province Key Medical Laboratory for Tumor Immunology & Traditional Chinese Medicine Immunology of Shandong Province, Jinan, Shandong 250062, China 2007Cellular & Molecular Immunology2007,4,1:12
7Run off-on-out method and models for soil infiltrability on hill-slope under rainfall conditions显示文摘The soil infiltrability of hill-slope is important to such studies and practices as hydrological process, crop water supply, irrigation practices, and soil erosion. A new method for measuring soil infiltrability on hill-slope under rainfall condition with run off-on-out was advanced. Based on water (mass) balance, the mathematic models for soil infiltrability estimated from the advances of runoff on soil surface and the water running out of the slope were derived. Experiments of 2 cases were con-ducted. Case I was done under a rainfall intensity of 20 mm/h, at a slope gradient of about 0° with a runoff/on length (area) ratio of 1 : 1. Case II was under a rainfall intensity of 60 mm/h and a slope of 20° with a runoff/on length (area) ratio of 1 : 1. Double ring method was also used to measure the infiltrability for comparison purposes. The experiments were done with soil moisture of 10%. Required data were collected from laboratory experiments. The infiltrability curves were computed from the experimental data. The results indicate that the method can well conceptually represent the transient infiltrability process, with capability to simulate the very high initial soil infiltrability. The rationalities of the method and the models were validated. The errors of the method for the two cases were 1.82%/1.39% and 4.49%/3.529% (Experimental/Model) respectively, as estimated by comparing the rainfall amount with the infiltrated volume, to demonstrate the accuracy of the method. The transient and steady infiltrability measured with double ring was much lower than those with this new method, due to water supply limit and soil aggregates breaking down at initial infiltration stage. The method can overcome the short backs of the traditional sprinkler method and double ring method for soil infil-traility. It can be used to measure the infiltrability of sloped surface under rainfall-runoff-erosion condi-tions, in the related studies.LEI Tingwu1,2, LIU Han1, PAN Yinghua3, ZHAO Jun2, ZHAO Shiwei2 & YANG Yonghui2 1. The Key Laboratory of Modern Precision Agriculture System Integration Research, College of Hydraulic and Civil Engineer-ing, China Agricultural University, Beijing 100083, China 2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Yangling 712100, China 3. Geographic and Resources Management College, Yantai Normal University, Yantai 264025, China 2006Science China Earth Sciences2006,49,2:11
8A UNIVERSAL ANALYTIC POTENTIAL-ENERGY FUNCTION BASED ON A PHASE FACTOR显示文摘Using a field equation with a phase factor, a universal analytic potential-energy function applied to the interactions between diatoms or molecules is derived, and five kinds of potential curves of common shapes are obtained adjusting the phase factors. The linear thermal expansion coefficients and Young’s moduli of eleven kinds of face-centered cubic (fcc) metals - Al, Cu, Ag, etc. are calculated using the potential-energy function; the computational results are quite consistent with experimental values. Moreover, an analytic relation between the linear thermal expansion coefficients and Young’s moduli of fcc metals is given using the potential-energy function. Finally, the force constants of fifty-five kinds of diatomic moleculars with low excitation state are computed using this theory, and they are quite consistent with RKR (Rydberg-Klein-Rees) experimental values.C.F. Yu* Deptartment of Physics, College of Science, Xi’an Polytechnic University, Xi’an 710048, China K. Yan Xi’an Modern Nonlinear Science Applying Institute, Xi’an 710061, China D.Z. Liu Section 602, Second Artillery Institute of Engineering, Xi’an 710025, China 2006Acta Metallurgica Sinica(English Letters)2006,19,6:11
9Research on the reconstruction method of porous media using multiple-point geostatistics显示文摘The pore structural characteristics have been the key to the studies on the mechanisms of fluids flow in porous media. With the development of experimental technology, the modern high-resolution equipments are capable of capturing pore structure images with a resolution of microns. But so far only 3D volume data of millimeter-scale rock samples can be obtained losslessly. It is necessary to explore the way of virtually reconstructing larger volume digital samples of porous media with the representative structural characteristics of the pore space. This paper proposes a reconstruction method of porous media using the structural characteristics captured by the data templates of multiple-point geostatistics. In this method, the probability of each structural characteristic of a pore space is acquired first, and then these characteristics are reproduced according to the probabilities to present the real structural characteristics in the reconstructed images. Our experimental results have shown that: (i) the deviation of LBM computed permeability respectively on the virtually reconstructed sandstone and the original sample is less than 1.2%; (ii) the reconstructed sandstone and the original sample have similar structural characteristics demonstrated by the variogram curves.ZHANG Ting 1,2,3, LI DaoLun 1,2 , LU DeTang 1,2 & YANG JiaQing 1,2 1 Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China 2 Research Center of Oil and Natural Gas, University of Science and Technology of China, Hefei 230027, China 3 The 28th Research Institute, China Electronics Technology Group Corporation, Nanjing, 210007, China 2010Science China(Physics,Mechanics & Astronomy)2010,53,1:10
10Acoustic radiation field of the truncated parametric source generated by a piston radiator:model and experiment显示文摘A theoretical model is presented to describe the parametric acoustic field generated by a piston radiator. In the model, the high-frequency primary wave interaction region that is truncated by a low-pass acoustic filter can be viewed as a cylindrical source within the Rayleigh distance of the piston. When the radius of the piston is much smaller than the length of the parametric region, this model is reduced to the Berketey’s End-Fire Line Army model. Comparison between numerical calculations and experimental measurement show that the generated parametric sound field (especially near the axis) agrees well with the experiment results.ZHAO Xiaoliang,ZHU Zhemin,DU Gonghuan (Institute of Acoustics and State Key Laboratory of Modern Acoustics, Nanjing University Nanjing 210093) TANG Haiqing,LI Shui,MIAO Rongxing (Hangzhou Applied Acoustics Institute Fuyang, Hangzhou 311400) 2001Chinese Journal of Acoustics2001,20,1:8
11柴油十六烷值改进剂的研制和使用显示文摘本文介绍了一种柴油十六烷值改进剂——硝酸异辛酯的研制情况,叙述了该剂对柴油的感受性,以及加剂后柴油的储存安定性、台架试验、行车试验和使用试验.结果表明,该硝酸异辛酯十六烷值改进剂对柴油有较好的感受性,添加0.05~0.3%后十六烷值可提高1~9个单位,与国外同类产品相当.加入改进剂的柴油能满足各类型柴油机车的使用要求.文中还提出了该产品的质量指标.Shengli Refinery of Qilu Petrochemical Corp.Xi’an Institute of Modern Chemistry 1990石油炼制1990,21,9:8
12The Separation Efficiency of Biopolymers with Short Column in Liquid Chromatography显示文摘Asaneffectivetoolfortheseparation,purification,andpreparationofbiopolymers,highperformanceliquidchromatographyhasbeenwidelyusedinthedownstreamofbiotechnologyandofactiveproteinsfromthetissuefruitinanimalsandplants.Scientistshavepaidmuchat'tentiontoexp...Tong LIU Xin Du GENG(Institute of Modem Separation Science, Shaanxi Provincial Key Laboratory of Modern SeparationScience, Northwest University, Xi’an 710069) 1999Chinese Chemical Letters1999,10,3:8
13Induction of Angiogenesis and Neurogenesis by Serum from Rats Treated with Shunaoxin Dropping Pills显示文摘Objective Shunaoxin Dropping Pills(SDPs),a Chinese patent medicine,has been used widely in China for the treatment of headache,amnesia,and insomnia.The aim of the present study is to observe the effect of SDPs on inducing angiogenesis and neurogenesis in vitro.Methods The present testing system using the serum obtained from animals ig treated with SDPs and a co-culture system in vitro was used to investigate if SDPs promotes brain microvascular endothelial cells(BMECs)tube formation and neural differentiation of neural stem/progenitor cells(NSPCs),which plays important roles in angiogenesis and neurogenesis.Results The SDPs serum sampled from rats ig treated with SDPs for 3 d dose-dependently promoted the tube like structure formation of cultured BMECs,and enhanced the fraction of MAP-2 positive cells of NSPCs,which co-cultured with the BMECs and astrocyte.In addition,there was no significant change in the percentage of glial fibrillary acidic protein positive cells.Conclusion Our results show that SDPs serum can induce neural differentiation and BMECs tube formation in vitro.ZHUANG Peng-wei1,JIANG Yong-bo1,ZHANG Yan-jun1,CUI Guang-zhi1,TONG Yong-ling2,YANG Xiao-hong3,JIANG Zhen1,LIU Li-hua2 1.Tianjin State Key Laboratory of Modern Chinese Medicine,Key Laboratory of Traditional Chinese Medicine Pharmacology,College of Chinese Materia Medica,Tianjin University of Traditional Chinese Medicine,Tianjin 300193,China 2.Tianjin NO.6 Traditional Chinese Medicine Factory,Zhongxin Pharmaceuticals,Tianjin 300401,China 3.Tianjin Zhongxin Pharmaceutical Group Corporation Limited,Tianjin 300193,China 2011Chinese Herbal Medicines2011,3,1:7
14Functional analysis of the Myostatin gene promoter in sheep显示文摘Compared with the understanding for the functional mechanism of the myostatin gene, little is known about the regulatory mechanism of the myostatin gene transcription and expression. To better under-stand the function of the myostatin gene promoter (MSTNpro) in the transcriptional regulation of the myostatin gene and to further investigate the transcriptional regulation mechanism of the myostatin gene, the promoter region of the myostatin gene in sheep has been cloned in our recent study (AY918121). In this study, the wild (W) type MSTNProW-EGFP vectors and E-box (E) (CANNTG) mutant (M) type MSTNProE(3+5+7)M-EGFP vectors were constructed and the transcriptional regulation activities were compared by detecting the fluorescent strength of EGFP (enhanced green fluorescent protein) in C2C12 myoblasts (or myotubes) and sheep fibroblasts transfected with the vectors. Results showed that the 0.3―1.2 kb sheep myostatin promoter could activate the transcription and expression of EGFP gene in C2C12 myoblasts to different extent and the 1.2 kb promoter was the strongest. However, fluorescence was not observed in the sheep fibroblasts transfected with the 1.2 kb sheep myostatin promoter. These results suggested that the specific nature of the myostatin gene expression in skeletal muscle was attributed to the specific nature of the myostatin promoter activity. The increasing growth density of C2C12 myoblasts inhibited the transcriptional regulation activity of the wild type sheep my-ostatin promoter by a mechanism of feedback. The transcriptional regulation activity of the 1.2 kb wild type sheep myostatin promoter increased significantly after C2C12 myoblasts were differentiated, while the activity of 1.2 kb E(3+5+7)-mutant type myostatin promoter had no obvious change. This result suggested that MyoD may be responsible for the difference of the myostatin gene transcription and expression between growing and differentiating conditions by binding to E-box of the myostatin promoter.DU Rong1,2, AN XiaoRong1, CHEN YongFu1 & QIN Jian3 1 State Key Laboratory for Agrobiotechnology, College of Biological Science, China Agricultural University, Beijing 100094, China 2 College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, China 3 College of Modern Education Technology, Shanxi Agricultural University, Taigu 030801, China 2007Science China(Life Sciences)2007,50,5:7
15Sonochemical effect of a bifrequency irradiation显示文摘The sonochemical effect of a bifrequency orthogonal ultrasonic irradiation has been studied by using two different detecting methods. It has been shown that the sonochemical yield produced by the bifrequency irradiation appears to be much more than the sum of the yields produced separately by the two irradiations. The bifrequency irradiation, therefore, can be expected to exert a great influence on the development of sonohemicalZHU Changping, FENG Ruo & ZHAO Yiyun Department of Physics. Jingzhou Normal College, Jingzhou 434100, China State Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China Chemistry Department of Yunnan University, Kunming 650091, Ch 2000Chinese Science Bulletin2000,45,2:7
16Structure analysis of ^(159)Sm and properties of odd-mass neutron-rich nuclei in mass-160 region显示文摘Recent fission experiment data provide interesting structure information for neutron-rich nuclei in the mass A ~ 160 region. We apply the projected shell model to study the strongly-deformed, neutron-rich Sm isotopes. We perform calculations for rotational bands up to spin I = 20 (29/2) for even-even (odd-neutron) Sm isotopes, and analyze the band structure of low-lying states with quasiparticle excitations. Emphasis is given to rotational bands based on one-quasiparticle (1-qp) configurations in the odd-mass 159Sm. The 159 Sm result is discussed together with those of the even-even isotopes 158,160Sm. New bands in 159Sm based on neutron 1-qp 1/2 and 5/2+ configurations are predicted. Electromagnetic transition probabilities are discussed.YANG YingChun1 & SUN Yang1,2,3 1 Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China 2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA 2011Science China(Physics,Mechanics & Astronomy)2011,54,S1:7
17The reliability of the improved e^N method for the transition prediction of boundary layers on a flat plate显示文摘The transition criterion in the improved eN method is that transition would occur whenever the velocity amplitude of disturbance reaches 1%-2% of the free stream velocity,while in the conventional eN method,the N factor is an empirical factor.In this paper the reliability of this key assumption in the improved eN method is checked by results of transition prediction by using the Parabolized Stability Equations(PSE).Transition locations of an incompressible boundary layer and a hypersonic boundary layer at Mach number 6 on a flat plate are predicted by both the improved eN method and the PSE method.Results from both methods agree fairly well with each other,implying that the transition criterion proposed in the improved eN method is reliable.SU CaiHong1,2 1 Department of Mechanics,Tianjin University,Tianjin 300072,China 2 Tianjin Key Laboratory of Modern Engineering Mechanics,Tianjin 300072,China 2012Science China(Physics,Mechanics & Astronomy)2012,55,5:7
18Quantum communications with an anonymous receiver显示文摘A new protocol for the anonymous communication of quantum information is proposed. The anonymity of the receiver and the privacy of the quantum information are perfectly protected except with exponentially small probability in this protocol. Furthermore, this protocol uses single photons to construct anonymous entanglement instead of multipartite entangled states, and therefore it reduces quantum resources compared with the pioneering work.WANG TianYin 1,2* , WEN QianYan 1 & ZHU FuChen 3 1 State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China 2 School of Mathematical Science, Luoyang Normal University, Luoyang 471022, China 3 National Laboratory for Modern Communications, Chengdu 610041, China 2010Science China(Physics,Mechanics & Astronomy)2010,53,12:5
19Bell violation for the thermal states of an XXZ spin chain with Dzialoshiski-Moriya interaction显示文摘The effect of Dzialoshiski-Moriya (DM) interaction on the violation of Bell inequality for thermal states of interacting qubits via a two-qubit XXZ spin chain is investigated.Our results imply that the DM interaction and anisotropy taking a large positive value can enhance the Bell violation and improve the threshold temperatures of it.By the comparison between the Bell violation and thermal entanglement,we find that the threshold temperatures of thermal entanglement are higher than those of the Bell violation.This implies that some states are entangled but the Bell inequality is not violated.MA XiaoSan 1 & WANG AnMin 2 1 School of Electric Engineering and Information,Anhui University of Technology,Maanshan 243002,China 2 Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China 2010Science China(Physics,Mechanics & Astronomy)2010,53,11:5
20A high time resolution multi-gap resistive plate chamber显示文摘Research on a single cell Multi-gap Resistive Plate Chamber (MRPC) was carried out for the Time Of Flight detector (TOF) R and D of the STAR experi- ment. The property of the single chamber was tested with the test beam facility T10 at CERN in Geneva. The MRPC was scanned with the test beam to get the efficiency and time resolution at different position of the active area. The HV plateau was also measured. The time resolution is 65 ps which satisfies the requirement of STAR. The working mechanism of the MRPC is also explained.LI Cheng, WU Jian, WANG Xiao-Lian, CHEN Hong-Fang, XU Zi-Zong, SHAO Ming, YE Shu-Wei, RUAN Li-Juan, HUANG Sheng-Li (Department of Modern Physics, University of Science and Technology of China, Hefei 230027) 2002Nuclear Science and Techniques2002,13,1:5
返回顶部 每页显示:
共18页 首页 上一页 第1页 下一页 末页 /18 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费