By throwing a particle with electric charge and angular momentum into the black holes,much evidence shows that the naked singularity of some(3+1)-dimensional black holes might be seen, which is not allowed in the weak...By throwing a particle with electric charge and angular momentum into the black holes,much evidence shows that the naked singularity of some(3+1)-dimensional black holes might be seen, which is not allowed in the weak cosmic censorship conjecture. In this study, we consider a(2+1)-dimensional Peldan black hole and find that it could be destroyed under certain conditions in both extreme and near-extreme cases.展开更多
Neglecting the self-force,self-energy and radiative effects,we follow the spirit of Wald's gedanken experiment and further discuss whether an extremal Kerr-Newman-AdS(KNA)black hole can turn into a naked singulari...Neglecting the self-force,self-energy and radiative effects,we follow the spirit of Wald's gedanken experiment and further discuss whether an extremal Kerr-Newman-AdS(KNA)black hole can turn into a naked singularity when it captures charged and spinning massive particles.It is found that feeding a test particle into an extremal KNA black hole could lead to a violation of cosmic censorship for the black hole.展开更多
The discrimination of synonyms has always been the key and difficult points in language learning.By using the British Na⁃tional Corpus(BNC)to retrieve the standard frequency,registers and collocations of the three com...The discrimination of synonyms has always been the key and difficult points in language learning.By using the British Na⁃tional Corpus(BNC)to retrieve the standard frequency,registers and collocations of the three common words,DESTORY,RUIN and DEMOLISH,this paper analyzes their similarities and differences.Besides,this paper demonstrates the strong ancillary func⁃tion of corpus in synonyms discrimination as well as in English teaching and learning.展开更多
Background: Destroyed lung is a lung condition commonly caused by tuberculosis. Other causes include bronchiectasis, aspergilloma, emphysema, etc. It is characterized by extensive lung destruction and reduced lung fun...Background: Destroyed lung is a lung condition commonly caused by tuberculosis. Other causes include bronchiectasis, aspergilloma, emphysema, etc. It is characterized by extensive lung destruction and reduced lung function. Chest X-ray, chest CT, bronchography, and ventilation-perfusion ratio scan are the commonest radiologic diagnostic tools. Treatment of choice may include pneumonectomy. The study aims to highlight the common causes of destroyed lung and the major presenting complaints based on age, sex and affected lungs. Method: Published cases from English medical journals were evaluated and analyzed. Results: 31 published cases on destroyed lung were reviewed. 58.1% showed that the left lung was the most commonly affected lung. The condition was more common in males (71%). Based on our review, the commonest causes are pneumonia and tuberculosis at 25.9% and 22.8%, respectively. Conclusion: Pneumonia and Tuberculosis seem to be the commonest causes of destroyed lung based on our review, with left sided affectation being more predominant.展开更多
Lithium is becoming common in our everyday lives.It is the key ingredient in the batteries of our mobile phones and electric vehicles,but have you ever wondered where it comes from?A new study Ied by Prof.ZHAO Gang an...Lithium is becoming common in our everyday lives.It is the key ingredient in the batteries of our mobile phones and electric vehicles,but have you ever wondered where it comes from?A new study Ied by Prof.ZHAO Gang and Dr.Yerra Bharat Kumar from the National Astronomical Observatories of Chinese Academy of Sciences(NAOC)provides a fresh understanding of both how Lithium is made,and how it is destroyed.展开更多
Among chronic pulmonary infections, pulmonary actinomycosis is a rare one, caused by a gram-positive microaerophilic bacterium called Actinomyces. Aside from cervicofacial or abdominopelvic actinomycosis, pulmonary in...Among chronic pulmonary infections, pulmonary actinomycosis is a rare one, caused by a gram-positive microaerophilic bacterium called Actinomyces. Aside from cervicofacial or abdominopelvic actinomycosis, pulmonary involvement is rare, and sometimes this type of infection results in a misdiagnosis of pulmonary tuberculosis or carcinoma. Clinical presentation of pulmonary actinomycosis could be acute or subacute, with lobar involvement. However, the disease is most commonly diagnosed at the chronic phase, with patients presenting mild fever, weight loss, and occasional hemoptysis. Here, we described the case of a 30-year-old male patient, presented with a history of respiratory complaints for more than three years and was diagnosed clinically and radiologically as a case of a destroyed left lung. Later on, post-operative tissue diagnosis was confirmed—pulmonary actinomycosis.展开更多
To introduce a safe,effective and lasting rhytidectomy technique without destroying the configuration of sideburns.Methods The operation is performed through the coronal incision,the temporal incision that is parallel...To introduce a safe,effective and lasting rhytidectomy technique without destroying the configuration of sideburns.Methods The operation is performed through the coronal incision,the temporal incision that is paralleled to the nasolabial sulcus,and the preauricular incision in the sideburns.Multi-layer dissection of facial tissue is made.Results 46 patints with aging face have been treated using this technique since 2002.All patinets obtained good curative effects without any severe complications.Conclusion This operation technique may maintain the natural configuration of the preauricular area and sideburns,result obscure incision scar and avoid harming important nerves or vessels.Multi-layer dissection accords with anatomical principles and produces a lasting curative effect.6 refs,2 figs.展开更多
Alongside China’s sustained economic growth its status in the in- ternational community has risen dramatically. This is evidenced by its extensive participation in the
A television documentary and better transportation have brought illegal treasure hunters to Minqing County with devastating results for the region’s ancient kilns In Yiyou Village,Minqing County in south China’s Fuj...A television documentary and better transportation have brought illegal treasure hunters to Minqing County with devastating results for the region’s ancient kilns In Yiyou Village,Minqing County in south China’s Fujian Province ancient ceramic bowls,kettles and cups fitter the ground.The ancient treasures are relics from the Song and Yuan dynasties and date back almost a thousand years.展开更多
U.S.President Trump announced on May 8th that the United States would unilaterally withdraw from the Joint Comprehensive Plan of Action for the Iran Nuclear Issue and restart sanctions against Iran.Countries such as C...U.S.President Trump announced on May 8th that the United States would unilaterally withdraw from the Joint Comprehensive Plan of Action for the Iran Nuclear Issue and restart sanctions against Iran.Countries such as China,Russia,Britain,France and Germany,etc.as well as International organizations such as the United Nations and the European Union,all expressed regret about the U.S.decision and hope to maintain the Agreement and the integrity and seriousness of the Agreement.展开更多
1998年10月上旬,德国的法兰克福正在举办第30届 Book Fair。Frankfurt Book Fair 是当今世界最大的书市。书市爆出一条新闻:ReinholdMessner 以其多次访问喜马拉雅山地区的冒险经历写了一本题为“Yeti”的书,并举行了记者招待会。其实,...1998年10月上旬,德国的法兰克福正在举办第30届 Book Fair。Frankfurt Book Fair 是当今世界最大的书市。书市爆出一条新闻:ReinholdMessner 以其多次访问喜马拉雅山地区的冒险经历写了一本题为“Yeti”的书,并举行了记者招待会。其实,对于“Yeti”,并非新鲜名词。前人对这个“喜马拉雅山之谜”早有探究。《英汉大词典》就对 Yeti 一词提供了释义:Yeti=AbominableSnowman,雪人,传说生存于喜马拉雅山上的一种动物,据信是熊。而 ReinholdMessner 在喜马拉雅山地区的探险见闻,不过是证实了“据信是熊”这一点而已(claims to confirm this with the help of photos taken during severalencounters)。可是,德国的几家报刊却对他的发现提出质疑。其实,作者作为一个探险家的精神是不能抹杀的。作者对 Yeti 的描述一定扣人心弦。本文提及的世界另一著名“怪兽”:Scotland's fabled Loch Ness monster。据报道,那也不过是一种庞大怪异的水生动物而已。展开更多
Rose Amin,a vendor and resident of Ndirande Township in the commercial city of Blantyre,Malawi,is among the displaced and destitute people now residing in classrooms at Namalimwe Primary School in the city suburbs.Thi...Rose Amin,a vendor and resident of Ndirande Township in the commercial city of Blantyre,Malawi,is among the displaced and destitute people now residing in classrooms at Namalimwe Primary School in the city suburbs.This is because her house,along with many others,was destroyed by Cyclone Freddy,which wreaked havoc across the country in mid-March.According to Amin,she is one of the lucky ones to narrowly escape with her life.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11275099,11435006 and 11405130the Double First-Class University Construction Project of Northwest University
文摘By throwing a particle with electric charge and angular momentum into the black holes,much evidence shows that the naked singularity of some(3+1)-dimensional black holes might be seen, which is not allowed in the weak cosmic censorship conjecture. In this study, we consider a(2+1)-dimensional Peldan black hole and find that it could be destroyed under certain conditions in both extreme and near-extreme cases.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11275099,11435006 and 11405130
文摘Neglecting the self-force,self-energy and radiative effects,we follow the spirit of Wald's gedanken experiment and further discuss whether an extremal Kerr-Newman-AdS(KNA)black hole can turn into a naked singularity when it captures charged and spinning massive particles.It is found that feeding a test particle into an extremal KNA black hole could lead to a violation of cosmic censorship for the black hole.
文摘The discrimination of synonyms has always been the key and difficult points in language learning.By using the British Na⁃tional Corpus(BNC)to retrieve the standard frequency,registers and collocations of the three common words,DESTORY,RUIN and DEMOLISH,this paper analyzes their similarities and differences.Besides,this paper demonstrates the strong ancillary func⁃tion of corpus in synonyms discrimination as well as in English teaching and learning.
文摘Background: Destroyed lung is a lung condition commonly caused by tuberculosis. Other causes include bronchiectasis, aspergilloma, emphysema, etc. It is characterized by extensive lung destruction and reduced lung function. Chest X-ray, chest CT, bronchography, and ventilation-perfusion ratio scan are the commonest radiologic diagnostic tools. Treatment of choice may include pneumonectomy. The study aims to highlight the common causes of destroyed lung and the major presenting complaints based on age, sex and affected lungs. Method: Published cases from English medical journals were evaluated and analyzed. Results: 31 published cases on destroyed lung were reviewed. 58.1% showed that the left lung was the most commonly affected lung. The condition was more common in males (71%). Based on our review, the commonest causes are pneumonia and tuberculosis at 25.9% and 22.8%, respectively. Conclusion: Pneumonia and Tuberculosis seem to be the commonest causes of destroyed lung based on our review, with left sided affectation being more predominant.
文摘Lithium is becoming common in our everyday lives.It is the key ingredient in the batteries of our mobile phones and electric vehicles,but have you ever wondered where it comes from?A new study Ied by Prof.ZHAO Gang and Dr.Yerra Bharat Kumar from the National Astronomical Observatories of Chinese Academy of Sciences(NAOC)provides a fresh understanding of both how Lithium is made,and how it is destroyed.
文摘Among chronic pulmonary infections, pulmonary actinomycosis is a rare one, caused by a gram-positive microaerophilic bacterium called Actinomyces. Aside from cervicofacial or abdominopelvic actinomycosis, pulmonary involvement is rare, and sometimes this type of infection results in a misdiagnosis of pulmonary tuberculosis or carcinoma. Clinical presentation of pulmonary actinomycosis could be acute or subacute, with lobar involvement. However, the disease is most commonly diagnosed at the chronic phase, with patients presenting mild fever, weight loss, and occasional hemoptysis. Here, we described the case of a 30-year-old male patient, presented with a history of respiratory complaints for more than three years and was diagnosed clinically and radiologically as a case of a destroyed left lung. Later on, post-operative tissue diagnosis was confirmed—pulmonary actinomycosis.
文摘To introduce a safe,effective and lasting rhytidectomy technique without destroying the configuration of sideburns.Methods The operation is performed through the coronal incision,the temporal incision that is paralleled to the nasolabial sulcus,and the preauricular incision in the sideburns.Multi-layer dissection of facial tissue is made.Results 46 patints with aging face have been treated using this technique since 2002.All patinets obtained good curative effects without any severe complications.Conclusion This operation technique may maintain the natural configuration of the preauricular area and sideburns,result obscure incision scar and avoid harming important nerves or vessels.Multi-layer dissection accords with anatomical principles and produces a lasting curative effect.6 refs,2 figs.
文摘Alongside China’s sustained economic growth its status in the in- ternational community has risen dramatically. This is evidenced by its extensive participation in the
文摘A television documentary and better transportation have brought illegal treasure hunters to Minqing County with devastating results for the region’s ancient kilns In Yiyou Village,Minqing County in south China’s Fujian Province ancient ceramic bowls,kettles and cups fitter the ground.The ancient treasures are relics from the Song and Yuan dynasties and date back almost a thousand years.
文摘U.S.President Trump announced on May 8th that the United States would unilaterally withdraw from the Joint Comprehensive Plan of Action for the Iran Nuclear Issue and restart sanctions against Iran.Countries such as China,Russia,Britain,France and Germany,etc.as well as International organizations such as the United Nations and the European Union,all expressed regret about the U.S.decision and hope to maintain the Agreement and the integrity and seriousness of the Agreement.
文摘1998年10月上旬,德国的法兰克福正在举办第30届 Book Fair。Frankfurt Book Fair 是当今世界最大的书市。书市爆出一条新闻:ReinholdMessner 以其多次访问喜马拉雅山地区的冒险经历写了一本题为“Yeti”的书,并举行了记者招待会。其实,对于“Yeti”,并非新鲜名词。前人对这个“喜马拉雅山之谜”早有探究。《英汉大词典》就对 Yeti 一词提供了释义:Yeti=AbominableSnowman,雪人,传说生存于喜马拉雅山上的一种动物,据信是熊。而 ReinholdMessner 在喜马拉雅山地区的探险见闻,不过是证实了“据信是熊”这一点而已(claims to confirm this with the help of photos taken during severalencounters)。可是,德国的几家报刊却对他的发现提出质疑。其实,作者作为一个探险家的精神是不能抹杀的。作者对 Yeti 的描述一定扣人心弦。本文提及的世界另一著名“怪兽”:Scotland's fabled Loch Ness monster。据报道,那也不过是一种庞大怪异的水生动物而已。
文摘Rose Amin,a vendor and resident of Ndirande Township in the commercial city of Blantyre,Malawi,is among the displaced and destitute people now residing in classrooms at Namalimwe Primary School in the city suburbs.This is because her house,along with many others,was destroyed by Cyclone Freddy,which wreaked havoc across the country in mid-March.According to Amin,she is one of the lucky ones to narrowly escape with her life.
