检索结果-南通市图书馆

Call admission control scheme for real-time services in packet-switched OFDM wireless networks

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 80-84页

作者： hu Nan WU Wei-ling School of Information Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

A call admission control scheme is proposed for real-time services in packet-switched orthogonal frequency division multiplexing （OFDM） wireless cellular networks. The main idea of the proposed scheme is to use maximum acceptance ratio to maintain maximum channel utilization for real-time services according to the desired packet-level and call- level quality-of-service （QoS） requirements. The acceptance ratio is periodically adjusted by using a time discrete Markov chain and Wiener prediction theory according to the varying traffic load. Extensive simulation results show that this algorithm maintains high channel utilization, even as it guarantees packet-level and call-level QoS requirements for real-time services.

关键词： call admission control OFDM packet transmission delay

马克思主义能否通过文化理论走向日常生活?——试析20世纪70年代之后国外马克思主义的“文化转向”

在线全文

学校读者我要写书评

暂无评论

南京大学学报（哲学．人文科学．社会科学） 2006年第5期43卷 13-20页

作者：胡大平南京大学马克思主义社会理论研究中心南京210093

20世纪70年代以来,西方马克思主义思潮明显地存在着一个“文化转向”,这种转向也明显地改变了由卢卡奇奠基的“西方马克思主义”传统。虽然它扩大了马克思主义的理论视野、为发挥其资本主义批判功能提供了一个有价值的路径,并借助文化... 详细信息

20世纪70年代以来,西方马克思主义思潮明显地存在着一个“文化转向”,这种转向也明显地改变了由卢卡奇奠基的“西方马克思主义”传统。虽然它扩大了马克思主义的理论视野、为发挥其资本主义批判功能提供了一个有价值的路径,并借助文化批评在全球理论空间中占据了一个独特位置,甚至对包括中国在内的全球马克思主义理论产生了重要影响,但它亦向马克思主义元理论提出了新的诉求甚至挑战。在根本上,文化转向实质性地改写了马克思主义理论的基本属性,把它从反资本主义的政治纲领转化成一般的反权力文化实践,从生产方式变革理论转化为生活方式选择理论,从历史理论转化为文本(话语)理论。因此,尽管文化理论突出了以日常生活为中轴的总体社会革命的重要意义,但目前仍难从其操作路径看到这一目标实现的可能性,亦很难将之视为马克思主义理论新形态的建构方向。

关键词：马克思主义文化理论日常生活

在线全文

学校读者我要写书评

暂无评论

西方马克思主义历史叙事转向及其政治意蕴

学习与探索 2011年第2期 20-26页

作者：胡大平南京大学马克思主义研究院南京210093

20世纪,尤其是80年代之后,西方马克思主义处于激烈的理论转向之中。这些转向在归根结底意义上都是历史认识论转向的结果,它们涉及历史叙事的主体和客体、历史性(过程)与共时性(结构)、内容和形式、实体和话语四种基本关系。在这些关系上... 详细信息

20世纪,尤其是80年代之后,西方马克思主义处于激烈的理论转向之中。这些转向在归根结底意义上都是历史认识论转向的结果,它们涉及历史叙事的主体和客体、历史性(过程)与共时性(结构)、内容和形式、实体和话语四种基本关系。在这些关系上,主流马克思主义坚持了客体、历史性、内容和实体的路向,西方马克思主义则转向主体、共时性、形式(结构)和话语。当代,激进主义在话语上的异常增殖,就其理论方面的原因来说,便是在多种历史叙事类型上的摇摆,并且正是这种摇摆为多元主义的泛滥提供了氛围。这种摇摆的政治后果是,理论得到发展,但却失去了诊断并干预社会历史事件的能力。正是因为这一能力的丧失,理论才转向自身而对真正的现实漠不关心。我们提出从历史叙事的角度观察当代西方马克思主义思潮的问题,正是为了在理论上提出对各种新话语之吸引力的警觉。

关键词：历史叙事西方马克思主义当代激进思潮

Mycoplasma pneumoniae pneumonia in hospitalized children diagnosed at acute stage by paired sera

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2010年第23期123卷 3444-3450页

作者： LIU Chun-ling WANG Gui-qiang ZHANG Bo XU hua hu Liang-ping he Xiao-feng WANG Jun-hua ZHANG Jun-hong LIU Xiao-yu WEI Ming LIU Zhen-ye Department of Infectious Disease Air Force General Hospital of Chinese People's Liberation Army Beijing 100142 China Department of Respiration Air Force General Hospital of Chinese People's Liberation Army Beijing 100142 China Department of Pediatrics Air Force General Hospital of Chinese People's Liberation Army Beijing 100142 China Department of Infection Control Air Force General Hospital of Chinese People's Liberation Army Beijing 100142 China Department of Cardiology Air Force General Hospital of Chinese People's Liberation Army Beijing 100142 China Department of Infectious Diseases and Center for Liver Diseases Peking University First Hospital Beijing 100034 China Consulting Center of Biomedical Statistics Academy of MilitaryMedical Sciences Beijing 100850 China

Background Mycoplasma pneumoniae （M. pneumoniae） is a frequent cause of respiratory tract infections. However,there is deficient knowledge about the clinical manifestations of M. pneumoniae infection. We described the clinical and laboratory findings of M. pneumoniae pneumonia in hospitalized children who were all diagnosed by a ≥ fourfold increase in antibody *** M. pneumoniae antibodies were routinely detected in children admitted with acute respiratory infection during a one-year period. The medical history was re-collected from children whose M. pneumoniae antibody titer increased≥fourfold at the bedside by a single person, and their frozen paired serum samples were measured again for the *** antibody *** Of the 635 children whose sera were detected for the M. pneumoniae antibody, paired sera were obtained from 82 and 29.3% （24/82） showed a ≥ fourfold increase in antibody titer. There were 24 cases, nine boys and 15 girls, aged from two to 14 years, whose second serum samples were taken on day 9 at the earliest after symptom onset; the shortest interval was three days. All children presented with a high fever （≥38.5℃） and coughing. Twenty-one had no nasal obstruction or a runny nose, and five had mild headaches which all were associated with the high fever. The disease was comparatively severe if the peak temperature was ＞39.5℃. All were diagnosed as having pneumonia through chest X-rays. Four had bilateral or multilobar involvement and their peak temperatures were all ≤ 39.5℃. None of the children had difficulty in breathing and all showed no signs of *** The second serum sample could be taken on day 9 at the earliest after symptom onset meant that paired sera could be used for the clinical diagnosis of M. pneumoniae pneumonia in children at the acute stage. M. pneumoniae is a lower respiratory tract pathogen. Extrapulmonary complications were rare and minor in our study. High peak temperature （＞39.5℃） is correlated

关键词： mycoplasma pneumonia children serum antibodies

Cross- cultural Communication and Chinese Folk Culture

在线全文

学校读者我要写书评

暂无评论

学术界 2016年第3期 314-318页

作者： hu Qingkun Anhui Sanlian University Hefei Anhui 230601

This paper aims to investigate the way for Chinese people to gain respect in cross- cultural communication and facilitate the appreciation and experience of the aesthetical spirit embedded in the splendid traditional Chinese culture. Via promoting our ethnic culture,Chinese culture can be properly developed and enriched,meanwhile,one can shape a self-personality characterized with an ethnic spirit. As has been commonly stated,Chinese culture is a sound base to win respect from foreign cultures. Therefore,folk culture plays a key role in the value system. It can directly shape an individual's personality and influence his or her status in international exchanges,which is deeply related to the dignity of the nation or the ethnical group.

关键词：中国人民间文化文化传播中国文化民族文化人格塑造跨文化交流审美精神

NOD-like receptors mediated activation of eosinophils interacting with bronchial epithelial cells： a link between innate immunity and allergic asthma

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2013年第4期10卷 317-329页

作者： Churl Kwok Wong Shuiqing hu Karen Ming-Lam Leungt Jie Dong Lan he Yi Jun Chu Ida Miu-Ting Chu huai-Na Qiu Kelly Yan-ping Liu ChristopherWai-Kei Lam Department of Chemical Pathology The Chinese University of Hong Kong Prince of Wales Hospital Hong Kong China Department of Medicine and Therapeutics The Chinese University of Hong Kong Prince of Wales Hospital Hong Kong China Macao Institute for Applied Research in Medicine and health Macao University of Science and Technology Taipa Macao China

Key intracytosolic pattern recognition receptors of innate immunity against bacterial infections are nucleotide-binding oligomerization domain （NOD）-Iike receptors （NLRs）. We elucidated the NOD1 and NOD2-mediated activation of human eosinophils, the principal effector cells for allergic inflammation, upon interacting with human bronchial epithelial BEAS-2B cells in allergic asthma. Eosinophils constitutively expressed NOD1,2 but exhibited nonsignificant responses to release chemokines upon the stimulation by NOD1 ligand 7-D-glutamyl-meso-diaminopimelic acid （iE-DAP） and NOD2 ligand muramyl dipeptide （MDP）. However, iE-DAP and MDP could significantly upregulate cell surface expression of CD18 and intercellular adhesion molecule （ICAM）-I on eosinophils and ICAM-1 on BEAS-2B cells, as well as induce chemokines CCL2 and CXCL8 release in the coculture system （all P〈0.05）. Both eosinophils and BEAS-2B cells were the main source for CXCL8 and CCL2 release in the coculture system upon iE-DAP or MDP stimulation. Direct interaction between eosinophils and BEAS-2B cells is responsible for CCL2 release, and soluble mediators are implicated in CXCL8 release. ERK and NF-KB play regulatory roles for the expression of adhesion molecules and chemokines in coculture. Treatment with NOD1,2 ligand could induce the subepithelial fibrosis and significantly enhance the serum concentration of total IgE, chemokine CCL5 for eosinophils and T helper type 2 （Th2） cells and asthma Th2 cytokine IL-13 in bronchoalveolar lavage fluid of ovalbumin-sensitized allergic asthmatic mice （all P〈0.05）. This study provides further evidence of bacterial infection-mediated activation of NOD1,2 in triggering allergic asthma via the activation of eosinophils interacting with bronchial epithelial cells at inflammatory airway.

关键词： allergy bronchial epithelial cells chemokines eosinophils signal transduction

Green Therapy of Cancer:A Promising Grope for Anticancer Strategy by Modern Chinese Medicine

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2018年第8期24卷 568-572页

作者： ZHOU Tian hu Kai-wen Department of Oncology Dongfang Hospital Affiliated to Beijing University of Chinese Medicine

In 2003, a 61-year old highly respected director of the Surgery Department of Dongfang Hospital Affiliated to Beijing University of Chinese Medicine was diagnosed as advanced lung cancer, moderately differentiated adenocarcinoma, coverinqmore than two thirds of the thoracic aorta, multiple mediastinal nodal metastases, pleural effusion ＂Only 3 months could be expected＂, a cruel fact came out after deliberation of many seasoned medical specialists. In the whole career of this surgery professor, he used the lancet as his weapon to save lives. But this time after weighing the pros and cons again and again, he required a ＂tender＂ plan with no lancet.

关键词： CGT In Green Therapy of Cancer:A Promising Grope for Anticancer Strategy by Modern Chinese Medicine QOL

Judicial Changes in Qing Beijing during the Shunzhi Period(1644-61)

在线全文

学校读者我要写书评

暂无评论

Frontiers of History in China 2020年第4期15卷 579-610页

作者： hu Xiangyu Institute of Qing History Renmin University of ChinaBeijing 100872China

The judicial system in Qing Beijing integrated both Ming and Manchu *** the Ming judicial system,the first level of courts in Beijing included the Ministry of Justice and the Censorate,and on the second level was the Court of Judicial *** the Ming,however,this system became heavily disrupted by the intelligence security apparatuses,like the Eastern *** the Manchu system,on the first level of courts was the banner company captains and on the second level was the Ministry of *** 1644,the Ming^institutional legacies and lessons remained so important to Manchu rulers that they eventually created an integrated legal system that primarily drew from the Ming *** integration reflected the Qing dynasty’s endeavor to adopt Ming *** Regent Dorgon insisted upon judicial separation on the first level of the courts—Censors of the Five Wards could not settle cases involving banner people,nor could the banner system handle cases involving civilians—while the Shunzhi emperor and his successors wanted judicial unity in Beijing and ordinary banner people and civilians to be adjudicated by the same courts.

关键词： Beijing Qing judicial system Manchus Shunzhi Dorgon

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

大蒜收获机设计与试验研究

农机化研究 2025年第4期47卷 167-173,196页

作者：耿令新李洋张利娟胡潇楠王恒一河南科技大学农业装备工程学院河南洛阳471003 河南科技大学车辆与交通工程学院河南洛阳471003

针对大蒜收获过程中蒜农劳动强度大、收获效率低、蒜茎未被收获等问题,设计了一种大蒜收获机,阐述了其主要结构与工作原理,并对挖掘输送装置和蒜茎切割装置等关键部件进行了研究。以前进速度、入土角和切割速度为试验因素,以大蒜挖出率... 详细信息

针对大蒜收获过程中蒜农劳动强度大、收获效率低、蒜茎未被收获等问题,设计了一种大蒜收获机,阐述了其主要结构与工作原理,并对挖掘输送装置和蒜茎切割装置等关键部件进行了研究。以前进速度、入土角和切割速度为试验因素,以大蒜挖出率和收集蒜茎率为试验指标,进行响应面试验设计及其参数优化,完成大蒜和蒜茎收获试验。结果表明:当前进速度0.25 m/s、入土角15°、切割速度0.3 m/s时,大蒜挖出率为94.2%,收集蒜茎率为92.4%。研究结果可为大蒜收获机的研发提供设计依据。

关键词：大蒜收获机挖掘输送蒜茎切割大蒜挖出率收集蒜茎率