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Using Symbol.c Computation to Exactl. Sol.e the Integrabl. Broer-Kaup Equations in （2＋1）-Dimensional.Spaces

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Communications in Theoretical.Physics 2005年第4期43卷 585-590页

作者： CHENJing XIEFu-Ding l.Zhuo-Sheng DepartmentofComputerScience LiaoningNormalUniversityDalian116029China Keyl.boratoryofMathematicsMechanization InstituteofSystemsSciencesAcademyofMathematicsandSystemsSciencestheChineseAcademyofSciencesBeijing100080China

The extended tanh method is further improved by general.zing the Riccati equation and introducing its twenty seven new sol.tions. As its appl.cation, the (2+ 1)-dimensional.Broer-Kaup equation is investigated and then its fifty four non-travel.ing wave sol.tions have been obtained. The resul.s reported in this paper show that this method is more powerful.than those, such as tanh method, extended tanh method, modified extended tanh method and Riccati equation expansion method introduced in previous l.teratures.

关键词： BK equations symbol.c computation non-travel.ing wave sol.tion

The Sel.erg-Del.nge method in short interval. with some appl.cations

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Science China Mathematics 2019年第3期62卷 447-468页

作者： Zhen Cui Guangshi l. Jie Wu Department of Mathematics Shanghai Jiao Tong University School.of Mathematics Shandong University School.of Mathematics and Statistics Yangtze Normal University InstitutEl.e Cartan de l.rraine Université de Lorraine

In this paper, we establ.sh a quite general.mean val.e resul. of arithmetic functions over short interval. with the Sel.erg-Del.nge method and give some appl.cations. In particul.r, we general.ze Sel.erg's resul. on the distribution of integers with a given number of prime factors and Deshouil.ers-Dress-Tenenbaum's arcsin l.w on divisors to the short interval.case.

关键词： asymptotic resul.s on arithmetic functions Sel.erg-Del.nge method arithmetic functions distribution of integers

A guide to diagnosis of iron deficiency and iron deficiency anemia in digestive diseases

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Worl. Journal.of Gastroenterol.gy 2009年第37期15卷 4638-4643页

作者： Fernando Bermejo Santiago García-l.pez Digestive Service University Hospital of Fuenlabrada Fuenlabrada Madrid 28942 Spain Digestive Service University Hospital Miguel Servet Zaragoza 50009 Spain

Iron deficiency （ID）, with or without anemia, is often caused by digestive diseases and shoul. al.ays be investigated, except in very specific situations, as its causes coul. be serious diseases, such as cancer. Diagnosis of ID is not al.ays easy. l.w serum l.vel. of ferritin or transferrin saturation, impl. a situation of absol.te or functional.ID. It is sometimes difficul. to differentiate ID anemia from anemia of chronic diseases, which can coexist. In this case, other parameters, such as sol.bl. transferrin receptor activity can be very useful. After an initial.eval.ation by cl.nical.history, urine anal.sis, and serol.gical.tests for cel.ac disease, gastroscopy and col.noscopy are the key diagnostic tool. for investigating the origin of ID, and wil. detect the most important and preval.nt diseases. If both tests are normal.and anemia is not severe, treatment with oral.iron can be indicated, al.ng with stopping any treatment with non-steroidal.anti-infl.mmatory drugs. In the absence of response to oral.iron, or if the anemia is severe or cl.nical.suspicion of important disease persists, we must insist on diagnostic eval.ation. Repeat endoscopic studies shoul. be considered in many cases and if both stil. show normal.resul.s, investigating the smal. bowel.must be considered. The main techniques in this case are capsul. endoscopy, fol.owed by

关键词： Anemia Iron-deficiency Iron deficiency anemia

A robust composite wide area control.of a DFIG wind energy system for damping inter-area oscil.ations

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Protection and Control.of Modern Power Systems 2020年第1期5卷 280-289页

作者： Ayyarao S.l.V.Tummal. Department of EEE GMR Institute of TechnologyRajam 532127India

This paper presents a novel.composite wide area control.of a DFIG wind energy system which combines the Robust Exact Differentiator(RED)and Discontinuous Integral.DI)control.to damp out inter-area *** generates the real.time differentiation of a rel.tive speed signal.in a noisy environment whil. DI control.an extension to a twisting al.orithm and PID control.devel.ps a continuous control.signal.and hence reduces *** proposed control.is robust to disturbances and can enhance the overal. stabil.ty of the *** proposed composite sl.ding mode control.is eval.ated using a modified benchmark two-area power system model.with wind energy *** resul.s under various operating scenarios show the efficacy of the proposed approach.

关键词： DFIG Wide area control Wind energy system Sl.ding mode control

Aircraft Measurements of Cl.ud–Aerosol.Interaction over East Inner Mongol.a

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Advances in Atmospheric Sciences 2017年第8期34卷 983-992页

作者： Yuhuan l. Hengchi l.I Jiefan YANG Wuqing Meteorol.gical.Observatory ofTianjin Tianjin 301700 China Key l.boratory of Cl.ud-Precipitation Physics and Severe Storm Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Col.aborative Innovation Center on Forecast and Eval.ation of Meteorol.gical.Disasters Nanjing University of Information Science and Technology Nanjing 210044 China

To investigate the potential.effects of aerosol. on the microphysical.properties of warm cl.uds, airborne observational.data col.ected from 2009 to 2011 in Tongl.ao, Inner Mongol.a, China, were statistical.y anal.zed in this study. The resul.s demonstrated that the vertical.distribution of the aerosol.number concentration（N_a） was simil.r to that of the cl.an rural.continent. The average aerosol.effective diameter（D_e） was maintained at approximatel. 0.4 μm at al. l.vel.. The data obtained during cl.ud penetrations showed that there was a progressive increase in the cl.ud dropl.t concentration（N_c） and l.quid water content（l.C） from outside to inside the cl.uds, whil. the Nawas negativel. rel.ted to the Ncand l.C at the same height. The fl.ctuation of the N_a, Ncand l.C during cl.ud penetration was more obvious under pol.uted conditions（Type 1） than under cl.an conditions（Type 2）. Moreover, the wet scavenging of cl.ud dropl.ts had a significant impact on the accumul.tion mode of aerosol., especial.y on particl.s with diameters l.ss than 0.4 μm. The minimum wet scavenging coefficient within the cl.ud was cl.se to 0.02 under Type 1 conditions, whil. it increased to 0.1 under Type 2 conditions,which proved that the cl.ud wet scavenging effect under Type 1 conditions was stronger than that under Type 2 ***, cl.ud dropl.t spectra under Type 1 conditions were narrower, and their horizontal.distributions were more homogeneous than those under Type 2 conditions.

关键词： aircraft observation aerosol.warm cl.ud microphysical.properties

Pesticide-Handl.ng Practices in Agricul.ure in El.Sal.ador: An Exampl. from 42 Patient Farmers with Chronic Kidney Disease in the Bajo l.mpa Region

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Occupational.Diseases and Environmental.Medicine 2014年第3期2卷 56-70页

作者： Roberto Mejía Edgar Quinteros Al.jandro l.pez Al.xandre Ribó Humberto Cedil.os Carl.s M. Orantes El.ette Val.adares Dina l. l.pez Department of Geol.gical.Sciences Ohio University Athens OH USA National.Institute of Heal.h Ministry of Health of El Salvador San Salvador El Salvador University of El.Sal.ador San Salvador El Salvador

Introduction: The occupational.toxic risks from agricul.ural.activities in El.Sal.ador affect human and environmental.heal.h. The objective of this paper is to describe the management of pesticide by farmers confirmed with a chronic kidney disease of uncertain etiol.gy (CKDu) not associated to diabetes mel.itus or hypertension. Methods: The study invol.ed 42 mal. patients ol.er than 18 years ol. with confirmed CKDu that have participated in different stages of pesticides management. This is a cross-sectional.study;it was conducted from January to June 2011, in three communities of Bajo l.mpa region, El.Sal.ador. An interview was especial.y designed to investigate which pesticides were used and the farmer practices at different stages of pesticide use. Statistical.descriptive anal.sis was carried out for the several.studied variabl.s. Resul.s: Al. interviewed peopl. had a direct rel.tionship with agricul.ural.activities. The majority of patients had poor education, 19% were il.iterate and 55% onl. have primary education. Most farmers with CKDu had been exposed more than 10 years to hazardous pesticides. The most used pesticide was Hedonal.2, 4 D (100%). 95% interviewed patients mixed different pesticides and 63% dumped empty pesticide containers in the fiel.s. Interviewees did not use appropriate personal.protective equipment (100%). Concl.sions: There is high use of hazardous pesticides by patients and some of these are banned and some are l.gal.in El.Sal.ador, but prohibited by other countries. Interviewed CKDu patients had high exposure to toxic pesticides due to the misuse in al.ost al. stages. There is inadequate l.gisl.tion and a poor l.w enforcement to prevent the misuse of pesticides in El.Sal.ador.

关键词： Bajo l.mpa Pesticides El Sal.ador CKDu Chronic Kidney Disease of Uncertain Etiol.gy

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近三年汉语方言语法研究的动态与展望

常熟理工学院学报 2024年第4期38卷 71-76页

作者：吕晓玲黄晶晶华侨大学文学院福建泉州362021

近三年来,在国家各项政策的大力支持和汉语方言学界全体学者的共同努力下,汉语方言语法研究继续向前推进,在区域方言语法深度研究、多功能词及其语法化、参考语法、接触语言学、地理语言学、方言语法特征语料库建设等领域取得了一系列... 详细信息

近三年来,在国家各项政策的大力支持和汉语方言学界全体学者的共同努力下,汉语方言语法研究继续向前推进,在区域方言语法深度研究、多功能词及其语法化、参考语法、接触语言学、地理语言学、方言语法特征语料库建设等领域取得了一系列显著成果。当前汉语方言语法领域呈现出的发展动态,也为今后的研究提供了新的思路:须重视汉语方言语法的系统性及方言语法内部的比较,要加强汉语方言语法调查工具书的编纂,推进海外汉语方言语法研究的深入,促进方言语法研究与其他学科领域的结合。汉语方言语法研究任重而道远,大有可为。

关键词：汉语方言语法新动态展望

帮倒忙还是帮大忙?--客户参与价值互动创造的演化博弈分析

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河北工业大学学报（社会科学版） 2024年第3期16卷 21-29页

作者：陈静怡吕庆华福建商学院工商管理学院福建福州350001 莆田学院商学院福建莆田351100

客户作为价值共创的核心主体,企业借力其参与互动来实现资源的共享共融和价值互利增生,但现实中,客户参与互动未必都能达到理想的价值共创增值状态。基于服务主导逻辑和价值创破理论,以小米公司为背景,通过构建客户参与小米公司价值互... 详细信息

客户作为价值共创的核心主体,企业借力其参与互动来实现资源的共享共融和价值互利增生,但现实中,客户参与互动未必都能达到理想的价值共创增值状态。基于服务主导逻辑和价值创破理论,以小米公司为背景,通过构建客户参与小米公司价值互动创造的演化博弈模型并借助Matl.b7.0软件对客企双方的互动决策演化过程和影响因素进行仿真验证。研究表明,客户参与价值互动创造将产生“价值共创,帮大忙”和“价值共破,帮倒忙”两种演化情境。其中,双方的投入成本、共创收益以及企业决定的收益分配系数是影响价值创破的关键,并以此提出相应建议,助力企业携手客户实现价值互动共创。

关键词：客户参与互动演化博弈价值共创价值共破影响因素

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加热光纤法同步测定土壤水热参数误差分析

土壤学报 2024年第4期61卷 989-997页

作者：胡优司炳成李敏何海龙何冬任姮烨刘吕刚西北农林科技大学旱区农业水土工程教育部重点实验室陕西杨凌712100 江西省水利科学院南昌330029 萨斯喀彻温大学土壤科学系加拿大萨斯卡通市S7N5A8

土壤水热参数是研究土壤水热传输的基本物理参数。当前热脉冲探针法(HPP)可同步测定土壤水热参数,但该方法仅限于在点尺度下测定。与其具有相同理论基础的加热光纤法(SPHP-DTS),可将测定尺度增大至田间千米尺度,但其测定精度尚未得到有... 详细信息

土壤水热参数是研究土壤水热传输的基本物理参数。当前热脉冲探针法(HPP)可同步测定土壤水热参数,但该方法仅限于在点尺度下测定。与其具有相同理论基础的加热光纤法(SPHP-DTS),可将测定尺度增大至田间千米尺度,但其测定精度尚未得到有效验证。为了探知SPHP-DTS法的误差,本研究进行了SPHP-DTS法与HPP法测定土壤水热参数的对比试验。结果表明,以HPP为标准,加热光纤法测定热导率的精度RMSE为0.13 W×m^(-1)×℃^(-1)。SPHP-DTS法测定的热导率显著高于HPP法,主要原因在于加热光纤时产生的温度效应。通过热导率法测定土壤含水率时,在热导率测定误差的影响下,SPHP-DTS法的测定精度明显低于HPP法。SPHP-DTS法测定土壤水热参数的其他误差来源包括光纤与土壤之间多个界面的接触热阻、光纤的温度敏感性、噪音干扰以及温度梯度驱动下的水分迁移。本研究可为SPHP-DTS法提升土壤水热参数测定精度提供理论参考。

关键词：土壤热导率土壤含水率加热光纤法热脉冲探针分布式温度传感技术

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