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简介：从除一个地点驱动的模式以外的一个数据驱动的通讯模式继承，命名数据联网(NDN)把更好的支持提供给网络层dataflow。然而，应用程序开发者不得不处理复杂任务，例如数据分割，包确认，和流动控制，由于在网络层上的合适的运输层协议的缺乏。在这研究，我们设计一个dataflow面向的编程接口为NDN提供运输策略，它极大地在开发应用程序改进效率。这个接口介绍检索策略根据出版模式，基于当前的网络地位和数据产生控制dataflow在采用一个适应ADUpipelining算法的不同数据评估的二个应用程序数据单位(ADU)。接口也提供网络测量策略监视许多影响应用程序表演的批评度量标准。我们由实现流的一个录像验证我们的接口的功能和性能在世界范围的NDN试验床上跨越11个时区的申请。我们的实验证明接口罐头高效地支持开发高效、驾驶dataflow的NDN应用程序。

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简介：Buildingaforestcityrequiressufficientareaofurbanforestsandanexpeditewatercirculatingsystem.TakingShanghaiasanexample,itisproposedthatChinashoulddevelopitsurbanforestrythroughnetworkingofforestsandwaterareasduetohighdensityofpopulation,limitedlandresourcesandpoorwatercirculatingsystem.InordertodevelopaconceptionofurbanforestwithChinesecharacteristics,thispaperelaboratesimplications,foundation,evolutionanddevelopmentofthenewconceptionthroughcomparativestudiesofurbanforestdevelopmentinsideandoutsideChina.

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简介：Device-to-device(D2D)通讯是为改进细胞的网络的一种新兴的技术，它在认识到事情(IoT)的因特网起一个重要作用。光谱效率，精力效率和网络的产量能被合作在一个自我组织的方法在多重D2D用户之中提高。以便没有减少的通讯质量，限制D2D用户和负担的干扰离开D2D用户的精力消费，一个干扰有限多用户合作计划被建议让多重D2D用户在这份报纸解决精力问题和干扰问题。多重D2D用户使用非直角的系列由自我组织的方法形成簇。多重D2D用户被划分成不同合作单位。在不同合作单位之中没有干扰以便以合作单位限制每个D2D用户的干扰。当连接能力不能满足用户率的要求时，它将生产一个中断事件。以便评估通讯质量，D2D连接的暴行概率被考虑连接延期阀值，数据率和干扰导出。除精力可获得性和每个D2D用户的signal-to-noise比率(SNR)以外，当选择中继D2D用户以便提高接待用户的D2D的signal-to-interference-plus-noise比率(SINR)时，在D2D用户之间的距离被考虑。联合导出的暴行概率，在平均连接延期阀值之中的关系，精力的效率和能力的效率被学习。模拟结果证明多重D2D用户合作计划不能仅仅帮助卸载精力消费并且限制D2D用户的干扰，而且提高精力的效率和能力的效率的干扰有限。

简介：AbstractBackground:Sexual transmission among men who have sex with men (MSM) is the dominant route of HIV transmission in China. Extensive use of geosocial networking (GSN) smartphone application (app) has dramatically changed the pattern of sexual behaviors and HIV risk among MSM, but data on HIV incidence and the changing risk behaviors of GSN app-using MSM are limited. We aims to assess the HIV incidence and its correlates among gay GSN app-using MSM in China.Methods:We constructed an open cohort which was initiated and maintained using a GSN app to assess the HIV incidence among app-using MSM, recruited from June 2017 to December 2018. MSM completed an online questionnaire on their sociodemographic characteristics, sexual behaviors, recreational drug use and sexually transmitted infections status. Then each man had an HIV test, and those tested negatives were enrolled into the cohort. Participants completed follow-ups with additional HIV tests though the app during the study period, and were censored at HIV seroconversion or study end date. HIV incidence was calculated by dividing the sum of observed HIV seroconversions by the observed person-time. Univariate (Chi-square test and Fisher’s exact test) and multivariate (proportional hazards regression) analyses were used to examine correlates of HIV incidence.Results:A total of 6957 HIV negative MSM were enrolled in the open cohort, 37 seroconversions occurred among 1937 men contributing 1065 observed person-years: HIV incidence was 3.47 per 100 person-years [95% confidence interval (CI): 2.37-4.57]. More than five sexual partners [hazard ratio (HR) = 2.65, 95% CI: 1.04-6.67], and sex with HIV positive partners (HR = 3.82, 95% CI: 1.16-12.64) in the preceding six months were positively associated with HIV seroconversion. Consistent condom use for anal sex (HR = 0.27, 95% CI: 0.07-0.96), and reporting insertive anal sex only (HR = 0.23, 95% CI: 0.08-0.62) in the preceding six months were protective factors for HIV seroconversion.Conclusions:Tailored interventions targeting app-using MSM are urgently needed given their high risk of HIV. As a new tool for accessing MSM at higher HIV risk, GSN smartphone app could play an important role in HIV research among MSM.