In order to better explore the function of urban forest in human habitation and settlement environment,the ecosystem functions were evaluated in terms of air purification,water conservation,soil conservation,maintenan...In order to better explore the function of urban forest in human habitation and settlement environment,the ecosystem functions were evaluated in terms of air purification,water conservation,soil conservation,maintenance of biodiversity in Meizhou by the methods of market price,shadow prices approach and opportunity cost,and the problems of the value assessment at home and abroad in urban forest ecosystem services function were simply discussed.展开更多
Background: The Nnewly reported cases ofcongenital syphilis have been increaseding substantiallyover the past few years. To control the epidemic, a mu-nicipal program aimed at preventing mother-to-childtransmission of...Background: The Nnewly reported cases ofcongenital syphilis have been increaseding substantiallyover the past few years. To control the epidemic, a mu-nicipal program aimed at preventing mother-to-childtransmission of syphilis was introduced in July, 2001,which was designed aimed to screen all pregnant womenfor syphilis at their first visit to antenatal clinics or atadmission to hospitals in Shenzhen.Objectives: The aim of the study is tTo determine theprevalence of syphilis among women attending antenatalclinics and other medical institutions in Shenzhen andidentifies its patterns of infection. Methods: Upon giving informed consent, w Women whoattended antenatal care centers in Shenzhen from Janu-ary to December 2003 were included in this study subjectto obtaining informed consent. A blood sample was har-vested for syphilis screened for syphilising by using rapidplasma reagent test (RPR) and confirmed by TPHA forthose who were RPR positive. The women with pregnantsyphilispositive serology were systematically interviewedto obtain . During the interview, their demographicdetailsinformation,patterns of risk behaviors andother data. Data were collected andwere analyzedretrospectively.Results: Among Of 118,235 pregnant women surveyed,555 pregnant women were confirmed to have syphilis(prevalence of 4.69%), with a incidence of 4.69‰。 123women were excluded from the analysis because of in-complete medical records. Of 432 infected subjects withcomplete medical records, the average age was 26.8, witha range of 19 to 41. 7.41% (32/432) of them suffered fromprimary syphilis, 3.24% (14 /432) were ofhad secondary syphilis, and 89.35% (386/432) had latent syphilis. with-out any conspicuous clinical signs and symptoms.Conclusions: The prevalence of syphilis among the preg-nant women in our series was high and most of them wereasymptomatic. Screening for syphilis among pregnantwomen in Shenzhen is of importantce for the preventionof mother-to-child transmission of syphilis.展开更多
We consider the problem of deforming a metric in its conformal class on a closed manifold, such that the k-curvature defined by the Bakry-mery Ricci tensor is a constant. We show its solvability on the manifold, provi...We consider the problem of deforming a metric in its conformal class on a closed manifold, such that the k-curvature defined by the Bakry-mery Ricci tensor is a constant. We show its solvability on the manifold, provided that the initial Bakry-mery Ricci tensor belongs to a negative cone. Moveover, the Monge-Ampère type equation with respect to the Bakry-mery Ricci tensor is also considered.展开更多
基金Supported by Special Funds for Central Financial to Support the Local Colleges and Universities([2013]389)~~
文摘In order to better explore the function of urban forest in human habitation and settlement environment,the ecosystem functions were evaluated in terms of air purification,water conservation,soil conservation,maintenance of biodiversity in Meizhou by the methods of market price,shadow prices approach and opportunity cost,and the problems of the value assessment at home and abroad in urban forest ecosystem services function were simply discussed.
文摘Background: The Nnewly reported cases ofcongenital syphilis have been increaseding substantiallyover the past few years. To control the epidemic, a mu-nicipal program aimed at preventing mother-to-childtransmission of syphilis was introduced in July, 2001,which was designed aimed to screen all pregnant womenfor syphilis at their first visit to antenatal clinics or atadmission to hospitals in Shenzhen.Objectives: The aim of the study is tTo determine theprevalence of syphilis among women attending antenatalclinics and other medical institutions in Shenzhen andidentifies its patterns of infection. Methods: Upon giving informed consent, w Women whoattended antenatal care centers in Shenzhen from Janu-ary to December 2003 were included in this study subjectto obtaining informed consent. A blood sample was har-vested for syphilis screened for syphilising by using rapidplasma reagent test (RPR) and confirmed by TPHA forthose who were RPR positive. The women with pregnantsyphilispositive serology were systematically interviewedto obtain . During the interview, their demographicdetailsinformation,patterns of risk behaviors andother data. Data were collected andwere analyzedretrospectively.Results: Among Of 118,235 pregnant women surveyed,555 pregnant women were confirmed to have syphilis(prevalence of 4.69%), with a incidence of 4.69‰。 123women were excluded from the analysis because of in-complete medical records. Of 432 infected subjects withcomplete medical records, the average age was 26.8, witha range of 19 to 41. 7.41% (32/432) of them suffered fromprimary syphilis, 3.24% (14 /432) were ofhad secondary syphilis, and 89.35% (386/432) had latent syphilis. with-out any conspicuous clinical signs and symptoms.Conclusions: The prevalence of syphilis among the preg-nant women in our series was high and most of them wereasymptomatic. Screening for syphilis among pregnantwomen in Shenzhen is of importantce for the preventionof mother-to-child transmission of syphilis.
文摘We consider the problem of deforming a metric in its conformal class on a closed manifold, such that the k-curvature defined by the Bakry-mery Ricci tensor is a constant. We show its solvability on the manifold, provided that the initial Bakry-mery Ricci tensor belongs to a negative cone. Moveover, the Monge-Ampère type equation with respect to the Bakry-mery Ricci tensor is also considered.
