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SOLITON SOLUTIONS OF A CLASS OF GENERALIZED NONLINEAR SCHRODINGER EQUATIONS

湖北省植物生理学会第十五次学术研讨会

作者： Neil M.price Department of Biology McGill University1205 Avenue Dr.PenfieldMontreal H3A 1B1QuebecCanada

Synechococcus species are important primary producers in the coastal aquatic environment and open ocean *** nitrate was provided as the nitrogen source,nickel addition at the environmentally relevant concentration cou... 详细信息

关键词： Growth Nickel Marine picophytoplankton Photosynthesis Synechococcus Superoxide dismutase

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Applied Mathematics:A Journal of Chinese Universities 1997年第4期 17-26页

作者： CAO QINGJIE, ZHANG TIANDE, AND K.DJIDJELI, G.W.price,E.H.TWIZELL

ＳＯＬＩＴＯＮＳＯＬＵＴＩＯＮＳＯＦＡＣＬＡＳＳＯＦＧＥＮＥＲＡＬＩＺＥＤＮＯＮＬＩＮＥＡＲＳＣＨＲＯＤＩＮＧＥＲＥＱＵＡＴＩＯＮＳＣＡＯＱＩＮＧＪＩＥ，ＺＨＡＮＧＴＩＡＮＤＥ，ＡＮＤＫ．ＤＪＩＤＪＥＬＩ，Ｇ．Ｗ．Ｐ... 详细信息

ＳＯＬＩＴＯＮＳＯＬＵＴＩＯＮＳＯＦＡＣＬＡＳＳＯＦＧＥＮＥＲＡＬＩＺＥＤＮＯＮＬＩＮＥＡＲＳＣＨＲＯＤＩＮＧＥＲＥＱＵＡＴＩＯＮＳＣＡＯＱＩＮＧＪＩＥ，ＺＨＡＮＧＴＩＡＮＤＥ，ＡＮＤＫ．ＤＪＩＤＪＥＬＩ，Ｇ．Ｗ．ＰＲＩＣＥ，Ｅ．Ｈ．ＴＷＩＺＥＬＬＡ...

关键词： CLASS

Rapid donor liver procurement with only aortic perfusion

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World Journal of Gastroenterology 2001年第6期7卷 884-886页

作者： Qi-Yuan Lin~1 KK Chui~2 AR-Nitin Rao~3 1 Department of General Surgery,First University Hospital,West China Medical Central of Sichuan University Chengdu 610041 China2 Department of surgery,The price of Wales Hospital,The Chinese University of Hong Kong3 Department of surgery,The price of Wales Hospital.The Chinese University of Hong Kong Department of General Surgery First University Hospital West China Medical Central of Sichuan University Chengdu China. qiyuan@***

AIM: To describe a rapid technique for procurement of donor liver with aortic perfusion only (APO). METHODS: Only the aorta is cannulated and perfused with chilled preservation solution. RESULTS: The quality of donor liver can ensure the grafted liver functions. CONCLUSION: The method of APO can simplify the operative procedure, compared with the dual cannulation. It also can minimize the danger of injuring vascular structures and involve less dissection.

关键词： Aorta Liver Perfusion Tissue Donors Humans Time Factors Tissue and Organ Harvesting

Brain metastasis in advanced colorectal cancer： results from the South Australian metastatic colorectal cancer (SAmCRC) registry

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Cancer Biology & Medicine 2017年第4期14卷 371-376页

作者： Gonzalo Tapia Rico Timothy J. price Christos Karapetis Cynthia Piantadosi Rob Padbury Amitesh Roy Guy Maddern James Moore Scott Carruthers David Roder Amanda R. Townsend Department of Medical Oncology The Queen Elizabeth Hospital and University of Adelaide Adelaide SA 5011 Australia Department of Medical Oncology Flinders Medical Center and Flinders University Adelaide SA 5042 Australia Department of Surgery Flinders Medical Center Bedford Park SA 5042 Australia Department of Surgery The Queen Elizabeth Hospital Adelaide SA 5011 Australia Department of Surgery University of South Australia Adelaide SA 5005 Australia Department of Surgery Royal Adelaide Hospital Adelaide SA 5000 Australia Department of Radiation Oncology Royal Adelaide Hospital Adelaide SA 5000 Australia Department of Epidemiology University of South Australia Adelaide SA 5005 Australia

Objective:Brain metastasis is considered rare in metastatic colorectal cancer(mCRC);thus,surveillance imaging does not routinely include the *** reported incidence of brain metastases ranges from 0.6% to 3.2%.Methods:The South Australian mCRC Registry(SAmCRC)was analyzed to assess the number of patients presenting with brain metastasis during their *** to small numbers,a descriptive analysis is ***:Only 59 patients of 4,100 on the registry at the time of analysis had developed brain metastasis(1.4%).The clinical characteristics of those with brain metastasis were as follows:the median age was 65.3 years and 51% were *** the V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog(KRAS)mutation status of the tumor was known,the majority harbored a KRAS mutation(55%);31(53%)underwent craniotomy and 55(93%)underwent whole-brain *** median survival time from diagnosis of brain metastasis was 4.2 months(95% confidence interval 2.9–5.5).Patients who underwent craniotomy and radiotherapy had superior survival compared to those who underwent whole-brain radiotherapy(8.5 months vs.2.2 months,respectively).Data from the SAmCRC(a population-based registry)confirm that brain metastases are rare and the median time to development is approximately 2 ***:Brain metastasis is a rare outcome in advanced *** within the registry tended to be female,young in age,and harbored with higher rates of KRAS *** routine surveillance brain scanning should be considered remains controversial given the relative rarity of developing brain metastases in mCRC and ultimately,most patients with central nervous system involvement die from their extracranial disease.

关键词： Brain metastasis colorectal cancer survival surveillance

Experimental observations of nonlinear effects of the Lamb waves

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Chinese Journal of Acoustics 2004年第3期23卷 226-243页

作者： DENGMingxi D.C.price D.A.Scott LogisticsEngineeringUniversityChongqing400016 CSIROTelecommunicationandIndustrialPhysicsNSW Australia

The experimental observations of nonlinear effects of the primary Lamb waves have been reported. Firstly, the brief descriptions have been made for the nonlinear acoustic measurement system developed by Ritec. The detailed considerations for the acoustic experiment system established for observing of the nonlinear effects of the primary Lamb waves have been carried out. Especially, the analysis focuses on the time-domain responses of second harmonics of the primary Lame waves by employing a straightforward model. Based on the existence conditions of strong nonlinearity of the primary Lamb waves, the wedge transducers are designed to generate and detect the primary and secondary waves on the surface of an aluminum sheet. For the different distances between the transmitting and receiving wedge transducers, the amplitudes of the primary waves and the second harmonics on the sheet surface have been measured within a specified frequency range. In the immediate vicinity of the driving frequency, where the primary and the double frequency Lamb waves have the same phase velocities, the quantitative relations of second-harmonic amplitudes with the propagation distance have been analyzed. It is experimentally verified that the second harmonics of the primary Lamb waves do have a cumulative growth effect along with the propagation distance.

关键词： Experimental observations of nonlinear effects of the Lamb waves MHz

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主动控制起落架建模与仿真

系统仿真学报 2008年第22期20卷 6261-6264,6272页

作者：王海涛 W.G.price 李为吉万小朋西北工业大学航空学院陕西西安710072 School of Engineering Sciences University of Southampton School of Engineering Sciences University of Southampton

建立了主动控制起落架系统的非线性模型和控制方程,对系统进行了稳定性分析,应用simulink对起落架主动控制系统进行了仿真,结果表明通过应用主动控制起落架系统,减小了飞机重心的垂直位移和起落架传递给机身的载荷,对提高飞机的滑行品... 详细信息

建立了主动控制起落架系统的非线性模型和控制方程,对系统进行了稳定性分析,应用simulink对起落架主动控制系统进行了仿真,结果表明通过应用主动控制起落架系统,减小了飞机重心的垂直位移和起落架传递给机身的载荷,对提高飞机的滑行品质、提高乘客的舒适性、改善民用飞机在低等级机场上以及军用飞机在修复类或损坏类跑道上的使用等有着重要的意义。

关键词：主动控制起落架振动冲击缓冲器

影响中小企业英语培训中心学生留存率的关键因素分析 ——以益华益升为例

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影响中小企业英语培训中心学生留存率的关键因素分析 ...

作者： Matthew C. price 湖北大学

学位级别：硕士

在过去的四十年中,中国人口的大量增长,带来了许多挑战和机遇,也给孩子的父母带来巨大压力。他们希望为孩子提供一切可能的机会,让他们的孩子将来的生活更好。通过学习好英语提升孩子的竞争力成为父母的首选,他们认为这样能使孩子赢在... 详细信息

在过去的四十年中,中国人口的大量增长,带来了许多挑战和机遇,也给孩子的父母带来巨大压力。他们希望为孩子提供一切可能的机会,让他们的孩子将来的生活更好。通过学习好英语提升孩子的竞争力成为父母的首选,他们认为这样能使孩子赢在起跑线上。他们看到朋友的孩子因此而取得了成功,这促使父母将其年收入的大一部分用于子女的教育。因此产生了一个庞大的课外英语培训市场,来满足父母的和渴望和需求。随着英语培训市场的快速增长,很多问题也纷纷暴露出来,其一个是“高分-低能”,通过培训让学生可获得高分但却不会很好的地说这种语言;其二是缺乏产品供应或价格结构的标准化,导致培训机构之间的教育质量大相径庭,为了合法地提供英语教学,培训机构必须同时获得营业执照和办学许可证,但绝大多数公司仅获得营业执照,为降低成本,教学条件简陋,仅通过租用少量的几间甚至一间办公室并进行简单的装修;在师资方面,为节省成本,很多培训机构也常常雇佣没有教学资格的老师,这导致了不同教师教学水平和能力巨大的差异。尽管这些都没有逃过管理当局的注意,他们也一直在采取重大而全面的行动试图来解决这一问题,但收效甚微。这引起了消费者在选择培训机构时很难决策,同时也加剧了培训市场的竞争,如何提高培训的质量,如何留住学员成为各个培训机构关注的热点问题。益华益升语言培训学校（SULS）成立于2010年,在少儿英语培训方面有着悠久的历史。在过去的十年中,他们已经从拥有四名员工的公司发展成为拥有三十多人的团队。每年的学生入学人数从以前的40多名增加到250多名,但是学生的留存率在人数的增长过程中也显著下降,现在每个学期的当前学生留存率保持在60%-70%之间。根据SULS提供的数据,使用了两种技术模型来寻找学生与其相应培训时长之间的有的关系。第一种方法是采用CART的现代决策树算法,第二种技术是Apriori关联算法。采用这两种方法,对数据进行分析,建立决策树、寻找学生在培训机构持续学习的相关因素。研究一方面证实了一些关键因素与现有研究相吻合,同时也发现某些因素并不像当前文献研究所说的那样重要。采用两种算法分析的结果都表明,较小的班级规模和外籍教师为主教与较长的学习时间有密切关系,教师与学生参与培训时间长度有关最紧密。对益华益升语言培训学校的研究表明,在40多位教师中,仅有四位教师的学生参与培训的时间显著比其他老师的学生参与培训的时间要长。然后针对SULS提出建议,说明它们将来如何提高学生的保留率。最后,本文总结了针对口语英语的小型培训中心的四个关键点。首先,较小的班级规模会导致更长的学生留任率;其次,寻找能够更好地留住学生并促进他们成为榜样老师的老师;第三,由于学生年龄的下降,目标市场是当前学业压力不高的市场。最后,价格本身仅在第一年成为主要障碍,随后的边际价格上涨不会导致学生离校。本文利用数据挖掘技术来查找出影响英语培训机构学生留存率的关键因素,其研究结论可为中国英语培训机构提供了参考,也为其它类型的培训机构提供借鉴。

关键词： APRIORI关联算法分类回归树 C4.5 英语培训机构学生留存率

Lessons learned from the Youngstown, Ohio induced earthquake sequence from January 2011 to January 2012

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第5期9卷 783-796页

作者： A.P.Morris D.A.Ferrill G.R.Walter A.M.price K.J.Smart R.J.Skoumal M.R.Brudzinski B.S.Currie Southwest Research Institute Culebra Road 6220 San Antonio TX 78238-5166 USA United States Geological Survey Earthquake Science Center 345 Middlefield Rd Building 3A RM 113 Menlo Park CA 94025 USA Department of Geology and Environmental Earth Science Miami University Oxford OH 45056 USA

The Youngstown earthquake sequence of 2011 is one of the clearest examples of inadvertently induced seismicity for which detailed documentation is *** this paper,we investigate(i) likely stress states in the vicinity of the injection well,(ii) a range of likely permeability scenarios,and(iii) relatively simple methods by which induced seismicity can be evaluated and *** use relocated hypocenters from the seismic sequence to construct a basement fault structure,which is then used to serve as a reference surface within the basement,and on which we calculate the effects of pore pressure changes induced by the injection activities of the Northstar #1 injection *** also deduce an in situ(preinjection) strike-slip stress regime,where ρ2≈ρ3,and it is consistent with both recent earthquake data and published stress estimates for the *** the reactivation characteristics of the basement are known or assumed,a critical or threshold slip tendency can be determined and the basement faults can be analyzed for the likelihood of reactivation in a perturbed pore pressure *** of well injection pressures and simulated pore pressure perturbations within the basement below the injection well indicates that permeability anisotropy is necessary to generate sufficient pore pressure perturbation to induce fault *** of the well’s injection history show that our estimate of in situ stress state,coupled with a highly anisotropic permeability structure,can generate sufficient pore pressure perturbation on the inferred basement structure to cause reactivation,potentially slipping an area of approximately 4×10~5 m~2.

关键词： Induced seismicity Wastewater injection Slip tendency

非线性流体-刚体结构相互作用问题的一种数值模拟方法

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固体力学学报 2005年第4期26卷 373-384页

作者：邢景棠 W G price 陈义根英南安普顿大学工学院

给出了一种模拟非线性流体-刚体结构相互作用问题的数值方法.文中假定结构承受大的刚体运动,流体流动受非线性有粘或无粘的场方程支配并满足自由表面和两相耦合界面上的非线性边界条件,利用任意拉氏-欧氏(ALE)网格系统构造了数值模型.... 详细信息

给出了一种模拟非线性流体-刚体结构相互作用问题的数值方法.文中假定结构承受大的刚体运动,流体流动受非线性有粘或无粘的场方程支配并满足自由表面和两相耦合界面上的非线性边界条件,利用任意拉氏-欧氏(ALE)网格系统构造了数值模型.采用所探讨的多块数值格式,允许可动重造网格间有独立的相对运动,从而克服了流体网格与固体大运动匹配的困难.通过数值离散化,导出了描述非线性流固耦合动力学的数值方程并应用耦合迭代过程对其作了求解.通过算例,说明了所提出数值模型的应用.

关键词：流体-结构相互作用非线性数值分析 ALE描述重迭网格流体动力学

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螺纹牙型高度的合理选择

工具技术 1994年第9期28卷 16-19页

作者： Robert price 向朝轩

对于复杂螺纹(包括三角形螺纹)的制造加工,底孔钻头的选择如果按照过时的底孔钻削工艺流程表规定的参数,就会出现一些问题。大多数底孔钻削工艺流程表中,从理论上规定的钻削尺寸为75％的螺纹牙型高度。事实上,在大多数的应用实际中,螺... 详细信息

对于复杂螺纹(包括三角形螺纹)的制造加工,底孔钻头的选择如果按照过时的底孔钻削工艺流程表规定的参数,就会出现一些问题。大多数底孔钻削工艺流程表中,从理论上规定的钻削尺寸为75％的螺纹牙型高度。事实上,在大多数的应用实际中,螺纹高度会偏离。然而。

关键词：螺纹加工底孔钻头选择