针对声学边界元法中解的非唯一性和奇异积分问题,基于组合亥姆霍兹积分方程公式(combined helmholtz integral equation formulation,CHIEF)法思想,将常规边界元方程和等效源方程进行联立,并利用两者方程系数矩阵间的耦合等价关系,间接...针对声学边界元法中解的非唯一性和奇异积分问题,基于组合亥姆霍兹积分方程公式(combined helmholtz integral equation formulation,CHIEF)法思想,将常规边界元方程和等效源方程进行联立,并利用两者方程系数矩阵间的耦合等价关系,间接替换计算常规边界元法中的奇异系数矩阵,进而提出一种具有全频域唯一解、高计算精度和高稳定性的耦合CHIEF法。该方法将等效源方程作为补充方程,不仅解决了传统CHIEF法内点补充方程失效的问题,而且矩阵的间接替换计算避免了直接计算奇异积分,显著提高了计算效率和精度。通过声辐射和声散射的典型算例对比了所提方法、常规边界元法、常规Burton-Miller法和等效源法的计算效果。结果表明,所提方法不仅在全波数域内均能获得唯一解,且其计算精度和效率均优于常规边界元法和常规Burton-Miller方法,其系数矩阵条件数远低于等效源法。展开更多
Purpose:This study investigated the publication behaviour of 573 chief editors managing 432 Social Sciences journals in Turkey.Direct inquiries into editorial qualifications are rare,and this research aims to shed lig...Purpose:This study investigated the publication behaviour of 573 chief editors managing 432 Social Sciences journals in Turkey.Direct inquiries into editorial qualifications are rare,and this research aims to shed light on editors’scientific leadership capabilities.Design/methodology/approach:This study contrasts insider publication behaviour in national journals with international articles in journals indexed by the Web of Science(WOS)and Scopus.It argues that editors demonstrating a consistent ability to publish in competitive WOS and Scopus indexed journals signal high qualifications,while editors with persistent insider behaviour and strong local orientation signal low qualification.Scientific leadership capability is measured by first-authored publications.Correlation and various regression tests are conducted to identify significant determinants of publication behaviour.Findings:International publications are rare and concentrated on a few individuals,while insider publications are endemic and constitute nearly 40%of all national articles.Editors publish 3.2 insider papers and 8.1 national papers for every SSCI article.62%(58%)of the editors have no SSCI(Scopus)article,53%(63%)do not have a single lead-authored WOS(Scopus)article,and 89%publish at least one insider paper.Only a minority consistently publish in international journals;a fifth of the editors have three or more SSCI publications,and a quarter have three or more Scopus articles.Editors with foreign Ph.D.degrees are the most qualified and internationally oriented,whereas non-mobile editors are the most underqualified and underperform other editors by every measure.Illustrating the overall lack of qualification,nearly half of the professor editors and the majority of the WOS and Scopus indexed journal editors have no record of SSCI or Scopus publications.Research limitations:This research relies on local settings that encourage national publications at the expense of international journals.Findings should be evaluated in light of this setting and bearing in mind that narrow localities are more prone to peer favouritism.Practical implications:Incompetent and nepotistic editors pose an imminent threat to Turkish national literature.A lasting solution would likely include the dismissal and replacement of unqualified editors,as well as delisting and closure of dozens of journals that operate in questionable ways and serve little scientific purpose.Originality/value:To my knowledge,this is the first study to document the publication behaviour of national journal chief editors.展开更多
The River Chief System (RCS) has evolved from local innovative practices to a national water governance strategy to address the current challenges in China’s water environmental management. In contrast to existing re...The River Chief System (RCS) has evolved from local innovative practices to a national water governance strategy to address the current challenges in China’s water environmental management. In contrast to existing research that focuses on the strengths, weaknesses, and improvements of RCS, this study uses literature study to reveal the dynamic evolution of RCS through three phases, with RCS spreading from developed coastal areas to central and western inland regions. RCS’s diffusion path involves vertical diffusion between central and local levels and horizontal diffusion among local governments. Moreover, RCS has also achieved conceptual spillover, gradually expanding into other governance domains, such as the Lake Chief System, the Field Chief System, the Forestry Chief System, and the integration of multiple chief roles. However, it is essential to scrutinize the phenomenon of applying similar governance mechanisms to different areas, as it may result in challenges such as overburdening local governments, insufficient public participation, oversimplification of differences in natural resource endowments, and limited applicability. This study also provides suggestions on how to address these challenges. The study contributes theoretical insights and policy implications, providing a foundation for practical policy innovation.展开更多
The study sought to assess the role and significance of chiefs in the traditional governance system of Cape Coast,Teshie and Kumasi communities in Ghana.This study employed the case study comparative approach.A total ...The study sought to assess the role and significance of chiefs in the traditional governance system of Cape Coast,Teshie and Kumasi communities in Ghana.This study employed the case study comparative approach.A total of 85 participants were selected for the study using the snowballing method of sampling.Data were collected using a four-point Likert scale questionnaire.Data analysis and presentation of results were done by using mean and standard deviation.The study revealed that chieftaincy as an institution is deeply rooted in the local communities.It further revealed that a chief is both the politico-military and religious head.It was recommended that there is the need for the modern state to go beyond just involving chiefs in only sod cutting ceremonies and other state functions to include them in the implementation of local development policies.Further to this,the roles and functions of traditional authorities and local government officials must be well-defined and agreed upon and the public must be made to understand this delineation of responsibilities brought by the government.展开更多
Gastric adenocarcinoma of the fundic gland(chief cellpredominant type, GA-FG-CCP) is a rare variant of welldifferentiated adenocarcinoma, and has been proposed to be a novel disease entity. GA-FG-CCP originates from t...Gastric adenocarcinoma of the fundic gland(chief cellpredominant type, GA-FG-CCP) is a rare variant of welldifferentiated adenocarcinoma, and has been proposed to be a novel disease entity. GA-FG-CCP originates from the gastric mucosa of the fundic gland region without chronic gastritis or intestinal metaplasia. The majority of GA-FG-CCPs exhibit either a submucosal tumor-like superficial elevated shape or a flat shape on macroscopic examination. Narrow-band imaging with endoscopic magnification may reveal a regular or an irregular microvascular pattern, depending on the degree of tumor exposure to the mucosal surface. Pathological analysis of GA-FG-CCPs is characterized by a high frequency of submucosal invasion, rare occurrences of lymphatic and venous invasion, and low-grade malignancy. Detection of diffuse positivity for pepsinogen-I by immunohistochemistry is specific for GA-FG-CCP. Careful endoscopic examination and detailed pathological evaluation are essential for early and accurate diagnosis of GA-FG-CCP. Nearly all GA-FG-CCPs are treated by endoscopic resection due to their small tumor size and low risk of recurrence or metastasis.展开更多
As part of their efforts to control water pollution,local governments in China introduced the river chief system,whereby a named individual undertakes responsibility for protecting a specified waterway.As one of the m...As part of their efforts to control water pollution,local governments in China introduced the river chief system,whereby a named individual undertakes responsibility for protecting a specified waterway.As one of the most prominent sources of water pollution,agricultural non-point-source(NPS)pollution is becoming increasingly serious.Determining whether the river chief system,an institutional reform in China's decentralized environmental regulation regime,is effective in alleviating NPS pollution is important for the realization of green development.The effect of the river chief system on reducing agricultural NPS pollution is explored in this study using panel data from 308 Chinese counties during the period from 2004 to 2015.The results reveal that the negative impact of manure output from animal breeding operations on surface water quality is reduced with the implementation of the river chief system.However,the river chief system is ineffective in dealing with the water pollution caused by fertilizer use.Furthermore,in the current system,cooperation among river chiefs only occurs within a province.Local governments should increase their efforts in reducing fertilizer source loads and preventing fertilizer loads from entering surface waters.In addition,the central government should improve cooperation among the river chiefs in upstream and downstream provinces.展开更多
The Ransom of Red Chief is a short story written by O·Henry. Some critics regard it as a plot story but some do not. A typical plot story should focus on the plot :using techniques such as flashback or foreshadow...The Ransom of Red Chief is a short story written by O·Henry. Some critics regard it as a plot story but some do not. A typical plot story should focus on the plot :using techniques such as flashback or foreshadowing to unfold the plot and containing exposition, complication, climax, resolution, conclusion to rich the plot. The main characters are presented with internal and external conflicts as well. In this thesis, a detailed analysis will be presented to prove that this story is really a plot story.展开更多
Prof.Bruce Spivey,Past President of ICO(left),and Prof.Bradly Straatsma(right),President Emeritus of ICO Foundation,met Prof.Xiu-Wen Hu Prof.Hugh Taylor,Immediately Past President of ICO,met Prof.Xiu-Wen Hu.
Dear readers, I am pleased to inform you of an important magazine, WORLD JOURNAL OF ACUPUNC-TURE, was published formally in Beijing, China, in July 1991 and will be distributed to the world. Ithink that it is a great ...Dear readers, I am pleased to inform you of an important magazine, WORLD JOURNAL OF ACUPUNC-TURE, was published formally in Beijing, China, in July 1991 and will be distributed to the world. Ithink that it is a great event in our acupuncture-moxibustion field. This international journal will playan important role in promoting understanding and cooperation among acupuncture-moxibustion groupsaround the world, strengthening international academic exchanges and developing the sciences ofacupuncture-moxibustion, thereby contributing to health for mankind or even earring out the strategicaim of WHO about "Health for all by the year 2000".展开更多
Prof.Bruce Spivey,Past President of ICO(left),and Prof.Bradly Straatsma(right),President Emeritus of ICO Foundation,met Prof Xiu-Wen HuProf.Peter Wiedemann,ICO President,met Prof Xiu-Wen Hu,IJO Chief Editor,and gave g...Prof.Bruce Spivey,Past President of ICO(left),and Prof.Bradly Straatsma(right),President Emeritus of ICO Foundation,met Prof Xiu-Wen HuProf.Peter Wiedemann,ICO President,met Prof Xiu-Wen Hu,IJO Chief Editor,and gave guidance to the development of IJOProf.Xiu-Wen Hu met Prof.David ParkeⅡ,CEO of American Academy of Ophthalmology(AAO)Prof.Xiu-Wen Hu met Prof.Sundaram Natarajan,President of AIOS(left),and Prof.Zbigniew Zagorski(middle).展开更多
After five years planning and working for its creation,and four years serving as its Founding Editor-in-Chief,it is time for me to step down and free IEEE/CAA Journal of Automatica Sinica to the new journey for its ne...After five years planning and working for its creation,and four years serving as its Founding Editor-in-Chief,it is time for me to step down and free IEEE/CAA Journal of Automatica Sinica to the new journey for its new level of excellence and significance.As many of you have known,on April 1,2017,I have been selected as the Editor-in-Chief展开更多
Objectives: EM physicians may be biased in seeing patients presenting with nonspecific complaints or requiring more extensive work-ups. The goal of our study was to ascertain if chief complaint affected time to be see...Objectives: EM physicians may be biased in seeing patients presenting with nonspecific complaints or requiring more extensive work-ups. The goal of our study was to ascertain if chief complaint affected time to be seen (TTBS) in the ED. Methods: A retrospective report was generated from the EMR for all moderate acuity patients who visited the ED from January 2005 to December 2010 at a large urban teaching hospital. Abdominal pain, alcohol intoxication, back pain, chest pain, cough, dyspnea, dizziness, fall, fever, flank pain, headache, infection, pain (nonspecific), psychiatric evaluation, “sent by MD”, vaginal bleeding, vomiting, and weakness were the most common complaints. Non-Parametric Independent Sample Tests assessed median TTBS between complaints, gender, and age. Chisquare testing assessed for differences in the distribution of arrival times. Results: We obtained data from 116,194 patients. Patients presenting with weakness and dizziness waited the longest time of 35 minutes and patients with flank pain waited the shortest with 24 minutes. Males waited 30 minutes and females waited 32 minutes. Younger females between the ages of 18 - 50 waited significantly longer when presenting with a chief complaint of abdominal pain, chest pain, or flank pain. There was no difference in the distribution of arrival times for these complaints. Conclusion: There is a significant bias toward seeing young male patients more quickly than women or older males. Patients might benefit from efforts to educate EM physicians on the delays and potential quality issues associated with this bias in an attempt to move toward more egalitarian patient selection.展开更多
文摘针对声学边界元法中解的非唯一性和奇异积分问题,基于组合亥姆霍兹积分方程公式(combined helmholtz integral equation formulation,CHIEF)法思想,将常规边界元方程和等效源方程进行联立,并利用两者方程系数矩阵间的耦合等价关系,间接替换计算常规边界元法中的奇异系数矩阵,进而提出一种具有全频域唯一解、高计算精度和高稳定性的耦合CHIEF法。该方法将等效源方程作为补充方程,不仅解决了传统CHIEF法内点补充方程失效的问题,而且矩阵的间接替换计算避免了直接计算奇异积分,显著提高了计算效率和精度。通过声辐射和声散射的典型算例对比了所提方法、常规边界元法、常规Burton-Miller法和等效源法的计算效果。结果表明,所提方法不仅在全波数域内均能获得唯一解,且其计算精度和效率均优于常规边界元法和常规Burton-Miller方法,其系数矩阵条件数远低于等效源法。
文摘Purpose:This study investigated the publication behaviour of 573 chief editors managing 432 Social Sciences journals in Turkey.Direct inquiries into editorial qualifications are rare,and this research aims to shed light on editors’scientific leadership capabilities.Design/methodology/approach:This study contrasts insider publication behaviour in national journals with international articles in journals indexed by the Web of Science(WOS)and Scopus.It argues that editors demonstrating a consistent ability to publish in competitive WOS and Scopus indexed journals signal high qualifications,while editors with persistent insider behaviour and strong local orientation signal low qualification.Scientific leadership capability is measured by first-authored publications.Correlation and various regression tests are conducted to identify significant determinants of publication behaviour.Findings:International publications are rare and concentrated on a few individuals,while insider publications are endemic and constitute nearly 40%of all national articles.Editors publish 3.2 insider papers and 8.1 national papers for every SSCI article.62%(58%)of the editors have no SSCI(Scopus)article,53%(63%)do not have a single lead-authored WOS(Scopus)article,and 89%publish at least one insider paper.Only a minority consistently publish in international journals;a fifth of the editors have three or more SSCI publications,and a quarter have three or more Scopus articles.Editors with foreign Ph.D.degrees are the most qualified and internationally oriented,whereas non-mobile editors are the most underqualified and underperform other editors by every measure.Illustrating the overall lack of qualification,nearly half of the professor editors and the majority of the WOS and Scopus indexed journal editors have no record of SSCI or Scopus publications.Research limitations:This research relies on local settings that encourage national publications at the expense of international journals.Findings should be evaluated in light of this setting and bearing in mind that narrow localities are more prone to peer favouritism.Practical implications:Incompetent and nepotistic editors pose an imminent threat to Turkish national literature.A lasting solution would likely include the dismissal and replacement of unqualified editors,as well as delisting and closure of dozens of journals that operate in questionable ways and serve little scientific purpose.Originality/value:To my knowledge,this is the first study to document the publication behaviour of national journal chief editors.
文摘The River Chief System (RCS) has evolved from local innovative practices to a national water governance strategy to address the current challenges in China’s water environmental management. In contrast to existing research that focuses on the strengths, weaknesses, and improvements of RCS, this study uses literature study to reveal the dynamic evolution of RCS through three phases, with RCS spreading from developed coastal areas to central and western inland regions. RCS’s diffusion path involves vertical diffusion between central and local levels and horizontal diffusion among local governments. Moreover, RCS has also achieved conceptual spillover, gradually expanding into other governance domains, such as the Lake Chief System, the Field Chief System, the Forestry Chief System, and the integration of multiple chief roles. However, it is essential to scrutinize the phenomenon of applying similar governance mechanisms to different areas, as it may result in challenges such as overburdening local governments, insufficient public participation, oversimplification of differences in natural resource endowments, and limited applicability. This study also provides suggestions on how to address these challenges. The study contributes theoretical insights and policy implications, providing a foundation for practical policy innovation.
文摘The study sought to assess the role and significance of chiefs in the traditional governance system of Cape Coast,Teshie and Kumasi communities in Ghana.This study employed the case study comparative approach.A total of 85 participants were selected for the study using the snowballing method of sampling.Data were collected using a four-point Likert scale questionnaire.Data analysis and presentation of results were done by using mean and standard deviation.The study revealed that chieftaincy as an institution is deeply rooted in the local communities.It further revealed that a chief is both the politico-military and religious head.It was recommended that there is the need for the modern state to go beyond just involving chiefs in only sod cutting ceremonies and other state functions to include them in the implementation of local development policies.Further to this,the roles and functions of traditional authorities and local government officials must be well-defined and agreed upon and the public must be made to understand this delineation of responsibilities brought by the government.
文摘Gastric adenocarcinoma of the fundic gland(chief cellpredominant type, GA-FG-CCP) is a rare variant of welldifferentiated adenocarcinoma, and has been proposed to be a novel disease entity. GA-FG-CCP originates from the gastric mucosa of the fundic gland region without chronic gastritis or intestinal metaplasia. The majority of GA-FG-CCPs exhibit either a submucosal tumor-like superficial elevated shape or a flat shape on macroscopic examination. Narrow-band imaging with endoscopic magnification may reveal a regular or an irregular microvascular pattern, depending on the degree of tumor exposure to the mucosal surface. Pathological analysis of GA-FG-CCPs is characterized by a high frequency of submucosal invasion, rare occurrences of lymphatic and venous invasion, and low-grade malignancy. Detection of diffuse positivity for pepsinogen-I by immunohistochemistry is specific for GA-FG-CCP. Careful endoscopic examination and detailed pathological evaluation are essential for early and accurate diagnosis of GA-FG-CCP. Nearly all GA-FG-CCPs are treated by endoscopic resection due to their small tumor size and low risk of recurrence or metastasis.
基金the financial support from the National Natural Sciences Foundation of China(71742002 and 71934003)the Priority Academic Program Development of Jiangsu Higher Education Institutions,China(PAPD)the China Center for Food Security Studies in Nanjing Agricultural University,China。
文摘As part of their efforts to control water pollution,local governments in China introduced the river chief system,whereby a named individual undertakes responsibility for protecting a specified waterway.As one of the most prominent sources of water pollution,agricultural non-point-source(NPS)pollution is becoming increasingly serious.Determining whether the river chief system,an institutional reform in China's decentralized environmental regulation regime,is effective in alleviating NPS pollution is important for the realization of green development.The effect of the river chief system on reducing agricultural NPS pollution is explored in this study using panel data from 308 Chinese counties during the period from 2004 to 2015.The results reveal that the negative impact of manure output from animal breeding operations on surface water quality is reduced with the implementation of the river chief system.However,the river chief system is ineffective in dealing with the water pollution caused by fertilizer use.Furthermore,in the current system,cooperation among river chiefs only occurs within a province.Local governments should increase their efforts in reducing fertilizer source loads and preventing fertilizer loads from entering surface waters.In addition,the central government should improve cooperation among the river chiefs in upstream and downstream provinces.
文摘The Ransom of Red Chief is a short story written by O·Henry. Some critics regard it as a plot story but some do not. A typical plot story should focus on the plot :using techniques such as flashback or foreshadowing to unfold the plot and containing exposition, complication, climax, resolution, conclusion to rich the plot. The main characters are presented with internal and external conflicts as well. In this thesis, a detailed analysis will be presented to prove that this story is really a plot story.
文摘Prof.Bruce Spivey,Past President of ICO(left),and Prof.Bradly Straatsma(right),President Emeritus of ICO Foundation,met Prof.Xiu-Wen Hu Prof.Hugh Taylor,Immediately Past President of ICO,met Prof.Xiu-Wen Hu.
文摘Dear readers, I am pleased to inform you of an important magazine, WORLD JOURNAL OF ACUPUNC-TURE, was published formally in Beijing, China, in July 1991 and will be distributed to the world. Ithink that it is a great event in our acupuncture-moxibustion field. This international journal will playan important role in promoting understanding and cooperation among acupuncture-moxibustion groupsaround the world, strengthening international academic exchanges and developing the sciences ofacupuncture-moxibustion, thereby contributing to health for mankind or even earring out the strategicaim of WHO about "Health for all by the year 2000".
文摘Prof.Bruce Spivey,Past President of ICO(left),and Prof.Bradly Straatsma(right),President Emeritus of ICO Foundation,met Prof Xiu-Wen HuProf.Peter Wiedemann,ICO President,met Prof Xiu-Wen Hu,IJO Chief Editor,and gave guidance to the development of IJOProf.Xiu-Wen Hu met Prof.David ParkeⅡ,CEO of American Academy of Ophthalmology(AAO)Prof.Xiu-Wen Hu met Prof.Sundaram Natarajan,President of AIOS(left),and Prof.Zbigniew Zagorski(middle).
文摘After five years planning and working for its creation,and four years serving as its Founding Editor-in-Chief,it is time for me to step down and free IEEE/CAA Journal of Automatica Sinica to the new journey for its new level of excellence and significance.As many of you have known,on April 1,2017,I have been selected as the Editor-in-Chief
文摘Objectives: EM physicians may be biased in seeing patients presenting with nonspecific complaints or requiring more extensive work-ups. The goal of our study was to ascertain if chief complaint affected time to be seen (TTBS) in the ED. Methods: A retrospective report was generated from the EMR for all moderate acuity patients who visited the ED from January 2005 to December 2010 at a large urban teaching hospital. Abdominal pain, alcohol intoxication, back pain, chest pain, cough, dyspnea, dizziness, fall, fever, flank pain, headache, infection, pain (nonspecific), psychiatric evaluation, “sent by MD”, vaginal bleeding, vomiting, and weakness were the most common complaints. Non-Parametric Independent Sample Tests assessed median TTBS between complaints, gender, and age. Chisquare testing assessed for differences in the distribution of arrival times. Results: We obtained data from 116,194 patients. Patients presenting with weakness and dizziness waited the longest time of 35 minutes and patients with flank pain waited the shortest with 24 minutes. Males waited 30 minutes and females waited 32 minutes. Younger females between the ages of 18 - 50 waited significantly longer when presenting with a chief complaint of abdominal pain, chest pain, or flank pain. There was no difference in the distribution of arrival times for these complaints. Conclusion: There is a significant bias toward seeing young male patients more quickly than women or older males. Patients might benefit from efforts to educate EM physicians on the delays and potential quality issues associated with this bias in an attempt to move toward more egalitarian patient selection.
