H2O分子在不同电荷态的重离子作用下的离化

利用含时密度泛函理论和局域密度近似方法，计算了H2O分子在速度为12．5α0／fs的重离子C^＋和C^2＋作用下产生的各种电荷态的H2O分子离子的几率、平均逃逸电子数和偶极矩的变化随时间的演化。计算结果表明，在重离子势最大时，电偶极矩的变化最大，重离子的电荷态越高，得到高电荷态H2O分子的几率越大；重离子远离分子时，电偶极矩的变化趋于平缓。The time-dependent density functional theory （TDDFT） and local density approximation （LDA） are used to calculate the dipole moment changes, the ionization probabilities of the H20 molecule and the time-dependent probabilities of escaped electrons in the process of excitation of H2O molecule by C^＋ , C^2＋ with energy of 2.3 MeV/u. It is shown that the dipole moment changes of H2O are the greatest and the higher the charge staate of heavy ion, the bigger the probabilities of the high charge state of H2O molecule at maximal heavy ion potential. The dipole moment changes slightly when heavy ion leaved far from molecule.     

水分子在不同电荷态的重离子作用下的离化作用

运用含时密度泛函理论和局域密度近似方法,计算了水分子H2O在速度为12.5 a0/fs的重离子C+和C2+作用下产生的各种电荷态的水分子离子的几率,平均逃逸电子数和偶极矩的变化随时间的演化.计算结果表明,在重离子势最大时,电偶极矩的变化最大;重离子远离分子时,重离子的电荷态越高,产生高电荷态分子的几率反而越小.     

BP：创新与风险管理

布朗勋爵曾因带领英国石油公司成为世界第二大石油和天然气公司而闻名。过程中,他改变了能源行业的格局。     

刘宝增：影响力是干出来的

7月15日,当刘宝增上身着藏蓝色上衣,下身穿红裤（这是中石化西北石油公司的统一的工服）,出现在《西北石油局、西北油田分公司全员成本目标管理经验交流会》现场时,中等身材的他,并不容易让人与普通的石油干部相区分,但当每一位发言者上台交流后,他简洁、严谨、数字化、犀利的点评方式,方显其CFO风采。     

用银行管理企业资产

资产管理,是指委托人将自己的资产交给受托人、由受托人为委托人提供理财服务的行为。后金融危机时代,中国财富与资产管理市场的发展空间巨大,如何有效把握财富与资产管理的机会,提高财富与资产管理的效率,挖掘财富与资产管理的市场潜力,已成为业界普遍关注的话题。而由北京国家会计学院主办的“企业资产管理论坛”,就为企业界、财富与资产管理机构、监管层、专家学者提供了一个前沿、高端、务实的探讨与对话平台。认识中国工商银行北京分行资金部副总经理张耿力,就是在这个论坛上。     

Partial Oxidation of Methane to Formaldehyde over Superfine Mo/ZrO_2 Catalysts

Superfine Mo/ZrO_2 catalysts were prepared for partial oxidation of methane to HCHO and characterized by BET, XRD, LRS, H2-TPR and XPS. Mo existed mainly in the form of Zr(MoO4)2, and the catalytic performance and physicochemical properties of the Mo/ZrO2 catalysts were closely related to this species.     

Propane Aromatization over Mo/HZSM-5 Catalysts

Impregnation, mechanical mixing and hydrothermal treatment methods were used to introduce molybdenum species into the HZSM-5 zeolite. The structure and surface acidity of the catalysts were studied by means of XRD, FT-IR, NH3-TPD, TPR and XPS. The effects of Mo content and reaction time on stream on the aromatization of propane were investigated. It was found that the performance of the Mo/HZSM-5 catalyst prepared by the hydrothermal treatment method was much better than that of the other two catalysts. For example, under the reaction conditions of 823 K and 600 h-1, propane conversion and aromatics selectivity over the catalyst prepared by hydrothermal pretreatment could reach 89.17% and 78.56%, respectively. XRD and XPS results showed that the Mo species in the catalysts prepared by hydrothermal treatment were highly dispersed on the surface of the HZSM-5, and larger amounts of them could penetrate into the HZSM-5 channel, as compared with the other two kinds of catalysts. These factors may be responsi     

“捕捉”

北京百家KTV拒付版权费，遭到中国音像著作权集体管理协会起诉。     

时尚雪莲，风暴中绽放—访北京雪莲时尚纺织有限公司总经理李卫东

源自美国的这场金融风暴，给这个世界带来的震动，用百年不遇来形容绝不为过。风暴中，我们听到的、看到的是不断倒下去的金融机构、企业。但就在如此凶险恶劣的市场环境中，我们发现，有些企业不仅成功突围，而且在风暴中发展、壮大了自己，并借此机会努力打造自己的品牌。北京雪莲时尚纺织有限公司就是这样一家企业。2007年，公司净利润2650万元，较上一年增长50％，2008年，截至9月份，净利润已完成2880万元，预计全年较上一年持续增长50％以上。