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Existence of infinite non-Birkhoff periodic orbits for area-preserving monotone twist maps of cylind
[期刊论文] 作者：CHENG Wei,CHENG Chongqing,
来源：中国科学A辑（英文版） 年份：2004
The exact monotone twist map of infinite cylinders in the Birkhoff region of instability is studied. A variational method based on Aubry-Mather theory is used t...
Re-evaluation of ABO gene polymorphisms detected in a genome-wide association study and risk of panc
[期刊论文] 作者：Hong-Li Xu,Jia-Rong Cheng,Wei,
来源：癌症（英文版） 年份：2004
Pancreatic cancer is a fatal malignancy with an increasing incidence in Shanghai, China. A genome-wide association study (GWAS) and other work have shown that A...
[期刊论文] 作者：YAN Qing-dong,LIU Cheng,WEI We,
来源：北京理工大学学报（英文版） 年份：2004
A flexible fiat torque converter was proposed to fulfill the requirement of miniaturization and power density maximization for automobiles.Constructed by two ar...
[期刊论文] 作者：CHENG Wei,JIN Ming,SHAO Guoxin,
来源：临床泌尿外科杂志 年份：2004
目的：探讨c-myc基因表达与肾癌发生发展和预后的关系。方法：应用SABC免疫组织化学法及原位杂交技术对42例肾癌组织中的P62蛋白合成和其中30例肾癌标本中的c-myc mRNA转录水平进...
[期刊论文] 作者：CHENG Wei,WU Hucai,YE Xiaoqin,,
来源：自然科学进展 年份：2004
A 368- water molecule structure I gas hydrate, encased by the number of helium (He) molecules ranging from two to twenty-two, are calculated by molecular dynami...
[期刊论文] 作者：CHENG Wei,Zhou Hongyu,REN Shan,
来源：科学通报（英文版） 年份：2004
A 368 water molecule structure I gas hydrate encased with 22 xenon molecules have been calculated by molecular dynamical simulations. The potential TIP4P was us...
[期刊论文] 作者：ZANG Shun-lai,GUO Cheng,WEI Go,
来源：中国有色金属学会会刊（英文版） 年份：2004
In order to improve the prediction capability of spring-back in aluminum sheet metal forming, the influence of the plastic deformation on elastic modulus is con...
[期刊论文] 作者：YAN Cheng,Wei Cai,Liancheng ZH,
来源：城市道桥与防洪 年份：2004
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥...
[期刊论文] 作者：Cheng Wei,Xiao Yingbin,Zhong Qianjin,
来源：中国人民解放军军医大学学报（英文版） 年份：2004
Papillary fibroelastoma, a rare primary benign tumor, can be found anywhere in the heart, but most commonly involves the cardiac valves. Most papillary fibroela...
[期刊论文] 作者：Lu Hai-tao,邓锐,CHENG Wei,程承,
来源：中南药学 年份：2004
目的 建立蒲公英中绿原酸、咖啡酸、香豆酸、阿魏酸和槲皮素等5种有效成分的提取方法和高效液相色谱测定方法.方法 分别采用乙醇浸提、回流、索氏提取、微波萃取等方法提取蒲...
[期刊论文] 作者：陈琦,Cheng Wei,曹军,Li Jianping,戴社,
来源：现代泌尿外科杂志 年份：2004
目的 制作犬尿道狭窄动物模型.方法 健康雄性成年犬15只,10 g/L戊巴比妥钠(30 mg/kg)静脉麻醉后,切开阴茎腹侧包皮,逆行尿道造影,随机抽取3只犬设为对照组,同步观察,余12只犬...
Determination of methyl tert-butyl ether (MTBE) in Chinese fuels by gas chromatography/mass spectrom
[期刊论文] 作者：LIU Jie-min,CHENG Wei,WEN Mei-juan,JIANG Gui-bin,
来源：环境科学学报(英文版) 年份：2004
A method was developed to determine the concentration of methyl tert-butyl ether(MTBE) in gasoline,diesel and heating oil by gas chromatography(GC) with mass sp...
[期刊论文] 作者：Cheng Wei,Xiao Yingbin,Zhong Qianjin,Wen Renguo,
来源：中国人民解放军军医大学学报 年份：2004
We report the case of a ten-year-old boy who had often presented with respiratory distress since born. Chest X-ray showed an enlarged right ventricle. Echocardi...
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