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COMPUTING AREAS BOUNDED BYRATIONAL BEZIER CURVES

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Computer Aided Drafting,Design and Manufacturing 1994年第2期4卷 18-27页

作者： Guojin wang Thomas w. Sederberg

An approach is presented for computing integral values, such as areas and volumes of revo-lution . of regions bounded by rational plane B zier curves. The method approximates rational curveswith polynomial curves, and then computes the integral values on those polynomial curves. Errorbounds are provided. For high precision, this new algorithm performs much more quickly than con-ventional numerical methods.

关键词： B zier curves area : volume of revolution polynomial approximation: error bounds

Planned Parenthood: Supply Induced Demand for Abortion in the US

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Open Journal of Preventive Medicine 2018年第4期8卷 142-145页

作者： James Studnicki John w. Fisher Charlotte Lozier Institute Arlington VA USA

The rate and number of induced abortions in the US has declined steadily for nearly three decades. In contrast to this overall reduction, Planned Parenthood Federation of America abortion providers exhibit a persistent increase in both abortions and their market share percentage of total abortion procedures. For the period 1995-2014, estimated annual and cumulative excess abortions are calculated (Planned Parenthood Abortion Inflation Effect—PPAIE) to indicate the number of abortions which would have been averted if the PP utilization experience had been identical to that of Non-PP abortion providers. PP excess abortions grew steadily each year from 21,000 in 1996 to 258,200 in 2014, 28% of total abortions that year. The cumulative number of abortions added by the PPAIE from 1995-2014 was 3,025,560 or 12.5% of the 24,112,600 performed. Planned Parenthood has had a long-term and accelerating inflationary effect on the incidence and prevalence of abortion in the US.

关键词： Abortion Supply Induced Demand (SID) Reproductive Health Policy Planned Parenthood

Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy

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Transactions of Nonferrous Metals Society of China 2014年第6期24卷 1989-1994页

作者：武占文陈吉朴楠孙成 w.HASSAN 张星航谢禹钧辽宁石油化工大学机械工程学院抚顺113001 中海油能源发展股份有限公司管道工程分公司天津300452 Department of Mechanical Engineering Materials Science and Engineering ProgramTexas A&M UniversityCollege Station

The corrosion behavior of bulk ultra-fine grained（UFG） Fe-Ni-Cr alloy prepared by equal-channel angular pressing technique was investigated in 0.25 mol/L Na2SO4＋0.05 mol/L H2SO4 solution by electrochemical *** compared to the coarse grained（CG） counterpart,the UFG alloy exhibits an acceleration of the active dissolution and a shrunk passive region with a higher passive *** Mott-Schottky analysis in conjunction with the point defect model indicates mat the donor diffusion coefficient in the passive films of the UFG sample increases greatly to one magnitude order higher and the donor density is slightly lower than that of the CG sample.

关键词： stainless steel Fe-Ni-Cr polarization acid corrosion passivation

Transplantation in Henmatology and Oncology Ⅱ

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国外医学情报 2005年第4期26卷 45-46页

作者： Berdel,w.E[etal.] 沈悌不详中国医学科学院北京协和医院血液科

本书是德国蒙司特大学(University of Mtinster)血液肿瘤内科和儿童血液肿瘤科的医师编辑的第二本关于造血干细胞移植的论文集。全书共分9章，包括35篇论文。内容涉及造血干细胞的临床应用以及基础研究。

关键词：《血液病与肿瘤的造血干细胞移植Ⅱ》内容评介血液肿瘤内科白血病

Gene Silencing of Receptor-Interacting Protein 2 （RIP2） Attenuates Allergic Airway

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中国药理通讯 2013年第3期30卷 7-8页

作者： w. S. Fred wong Department of Pharmacology Yong Loo Lin School of Medicine National University Health System Singapore Immunology Program Life Science Institute National University of Singapore Singapore

Persistent activation of nuclear factor-κB (NF-κB) is associated with the development of allergic asthma. Receptor Interacting Protein 2 (RIP2) is an adaptor protein encoded with serine/threonine kinase activity, and its protein-protein interaction function plays a critical role in mediating T-cell receptor engagement-induced NF-κB activation. A genetic analysis study has associated RIP2 gene with asthma severity. we hypothesized that silencing of RIP2 gene may attenuate allergic airway inflammation.

关键词：论文摘要药理学 OVA TSLP

worldwide impacts of atmospheric vapor pressure deficit on the interannual variability of terrestrial carbon sinks

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National Science Review 2022年第4期9卷 33-40页

作者： Bin He Chen Chen Shangrong Lin wenping Yuan Hans w.Chen Deliang Chen Yafeng Zhang Lanlan Guo Xiang Zhao Xuebang Liu Shilong Piao Ziqian Zhong Rui wang Rui Tang State Key Laboratory of Earth Surface Processes and Resource Ecology College of Global Change and Earth System ScienceBeijing Normal University Department of Application Research Twenty First Century Aerospace Technology Co.Ltd. School of Atmospheric Sciences Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Sun Yat-sen University Department of Physical Geography and Ecosystem Science Lund University Regional Climate Group Department of Earth SciencesUniversity of Gothenburg Academy of Disaster Reduction and Emergency Management School of GeographyBeijing Normal University State Key Laboratory of Remote Sensing Science Faculty of Geographical ScienceBeijing Normal University Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking University

Interannual variability of the terrestrial ecosystem carbon sink is substantially regulated by various environmental variables and highly dominates the interannual variation of atmospheric carbon dioxide(CO2) ***,it is necessary to determine dominating factors affecting the interannual variability of the carbon sink to improve our capability of predicting future terrestrial carbon *** global datasets derived from machine-learning methods and process-based ecosystem models,this study reveals that the inter annual variability of the atmospheric vapor pressure deficit(VPD) was significantly negatively correlated with net ecosystem production(NEP) and substantially impacted the inter annual variability of the atmospheric CO2growth rate(CGR).Further analyses found widespread constraints of VPD interannual variability on terrestrial gross primary production(GPP),causing VPD to impact NEP and *** correlation analysis confirms the persistent and widespread impacts of VPD on terrestrial carbon sinks compared to other environmental *** Earth system models underestimate the interannual variability in VPD and its impacts on GPP and *** results highlight the importance of VPD for terrestrial carbon sinks in assessing ecosystems’ responses to future climate conditions.

关键词： vapor pressure deficit net ecosystem production gross vegetation production carbon dioxide concentration

弹性圆柱壳在轴向冲击载荷和温度耦合作用下的屈曲

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计算力学学报 2010年第5期27卷 759-763页

作者：褚洪杰徐新生 C.w.Lim 马建青大连理工大学工程力学系工业装备结构分析国家重点实验室大连116024 香港城市大学建筑系

通过引入哈密顿体系,将临界载荷和临界温度及它们所对应的屈曲模态归结为辛体系下的广义本征值和本征解问题。根据辛本征解的正交性和完备性,给出了全部的且独立存在的屈曲模态。数值结果表明,在轴向冲击载荷和温度耦合作用下,弹性圆柱... 详细信息

通过引入哈密顿体系,将临界载荷和临界温度及它们所对应的屈曲模态归结为辛体系下的广义本征值和本征解问题。根据辛本征解的正交性和完备性,给出了全部的且独立存在的屈曲模态。数值结果表明,在轴向冲击载荷和温度耦合作用下,弹性圆柱壳的屈曲呈现出复杂的模式,温度直接影响冲击临界载荷的大小。随着温度的增加,冲击临界荷载降低,最后,文中给出各种条件下的屈曲模态。

关键词：哈密顿体系动态屈曲圆柱壳轴向冲击温度