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  • 简介:那结果的消除是解决multivariate多项式方程的一个有效方法,是众所周知的。在这份报纸,而不是由可变消除经由变量计算目标resultants,作者联合multivariate含蓄的方程插值和multivariate计算减少的resultants的结果的消除,在哪个multivariate的技术含蓄的方程插值被一些高概率算法在multivariate多项式插值和univariate上完成合理函数插值。作为结果的消除的应用,作者在三个著名未解决的组合几何优化问题上说明建议算法。实验证明结果的消除的建议途径比某存在更有效这些困难的问题上的结果的消除方法。

  • 标签: 消除 含蓄的方程 插值 RESULTANTS
  • 简介:基因子集选择为microarray数据的分类和分析是必要的。然而,自从基因表示数据,基因选择被知道是一项很困难的任务不仅有高维数,而且包含冗余的信息和噪音。应付这些困难,这份报纸介绍基于的预处理途径二个主要步骤填写了的模糊逻辑。首先,我们使用模糊推理规则把给定的数据集的基因表达式层次转变成模糊的值。然后,我们把一种类似关系用于这些模糊价值定义模糊等价组,包含强烈类似的基因的每个组。尺寸减小被基于相互的信息为每组类似的基因考虑一个单个代表完成。为了估计这的实用性,来临,广泛的试验用三个统计过滤器和三个分类器与一个联合分类模型一起在三著名公共数据集上被执行。

  • 标签: 模糊程序 基因选择 降维 生物信息
  • 简介:Laser-inducedbreakdownspectroscopy(LIBS)isapromisinganalyticalspectroscopytechnologybasedonspectroscopicanalysisoftheradiationemittedbylaser-producedplasma.However,forquantitativeanalysisbyLIBS,theso-calledself-absorptioneffectsonthespectrallines,whichaffectplasmacharacteristics,emissionlineshapes,calibrationcurves,etc,cannolongerbeneglected.Hence,understandinganddeterminingtheself-absorptioneffectsareofutmostimportancetoLIBSresearch.Thepurposeofthisreviewistoprovideaglobaloverviewofself-absorptioninLIBSontheissuesofexperimentalobservationsandadverseeffects,physicalmechanisms,correctionoreliminationapproaches,andutilizationsinthepastcentury.Webelievethatbetterunderstandingandeffectivesolvingtheself-absorptioneffectwillfurtherenhancethedevelopmentandmaturityofLIBS.

  • 标签: LASER-INDUCED BREAKDOWN spectroscopy(LIBS) SELF-ABSORPTION effect optically
  • 简介:managementsoliton(CSDDMS)被解释的集中的慢慢地减少的分散的概念,和在在散布的multi-photonnonlinear康普顿下面的全部的内部反射photonic水晶纤维(TIRPCF)的solitonpropagation的非线性的Shroedinger方程(NSE)被给。通过由步用Fourier这个方程解决,它在某些条件下面被发现那,soliton夫妇变得进thequasi-solitons,谁的振幅和宽度慢慢地并且周期性地被改变,但是有任何碰撞。在TIRPCFusing消除光soliton的裂口和变丑的一个新方法CSDDMS被建议。

  • 标签: CSDDMS 傅立叶变换 孤立子 光子晶体纤维
  • 简介:AbstractChronic hepatitis B virus (HBV) infection is a serious health issue because of its severe sequelae. Prevention of mother-to-child transmission (MTCT) of HBV is critical to eliminate chronic HBV infection. Here, we reviewed the progress toward the elimination of HBV infection in children in China in the recent decade. A universal hepatitis B vaccination program started from 2002 has been intensified, with the coverage of timely birth dose >95% of all newborn infants from 2012. Since 2011, China has taken a nationwide program to administer hepatitis B immunoglobulin (HBIG) with free of charge in all neonates of HBV-infected mothers, leading to a significant increment of timely use of HBIG. The prevalence of hepatitis B surface antigen (HBsAg) was declined from around 10% among children in 1980s to <0.5% among children born after 2011. Administration of oral antiviral agents in HBV-infected pregnant women with HBV DNA >2 × 105 U/mL during the third trimester is increasing, which will further reduce MTCT of HBV. However, there are some challenges in the elimination of HBV infection in children, which need to overcome by the concerted efforts. Nevertheless, it is anticipated that China will achieve the goal set by the World Health Organization that the prevalence of HBsAg in children aged <5 years is ≤0.1% by 2030.

  • 标签: Hepatitis B virus Mother-to-child transmission Immunoprophylaxis HBsAg prevalence Children China
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  • 简介:支持硅石的分叉的polyethylenimine(Sil@PEI)是常规吸附物并且显示出一种有限亲密关系到anionic表面活化剂和小染料(K=106107L/mol)。如果PEI是与cetyl组(C16)一起的alkylated,产生吸附物的K(Sil@PEI@C16x,在x是PEI单位的部分的地方是alkylated)显著地被改进。优化证明Sil@PEI@C16-0.15能最好在1010mol/L附近把水的表面活化剂归结为残余;当Sil@PEI@C16-0.6能在1010mol/L下面把甚至小的水的染料归结为残余时,将近105-fold由Sil@PEI比那降低。吸附物是井recyclable。在染料的情况中,稠密的cetyl壳能从笨重的水孤立PEI并且因此走水路压制竞争绑定,这被相信;当时在表面活化剂的情况中,semiclosedcetyl壳能同时遇见静电的补充和恐水病的补充到表面活化剂。

  • 标签: 下线 服务 迁移
  • 简介:AgeopulseseismicsystemwasimplementedtoobtainnewinformationonunderlyingstratabeneaththeYellowRiverDelta.However,owingtotheslippingofseafloorandshallowwater(<25m),freesurface-relatedmultiplesareconflictedwiththeflatprimaries,whichmayinstructtheinterpretersinawrongwayandmakewrongconclusions.Owingtothevariationofmultipleperiods,standardanti-multipletechniquesmaylosetheirpower,suchaspredictivedeconvolution.Surface-relatedmultipleeliminationmethodsareintroducedtoattenuatethemultiplesbasedontheunderlyingwave-equationprinciples.Theresultsjustifiedthemethodonthesingle-channelgeopulseprofile,revealingtherealnatureofthesubsurface.

  • 标签: 黄河三角州 入海口 浅水区域 海底
  • 简介:AbstractBackground:Eradication of infectious disease is the sanctified public health and sustainable development goal around the world.Main body:Three antimalarial barriers were developed to control imported malarial cases, and an effective surveillance strategy known as the "1-3-7 approach" was developed to eliminate malaria from the Chinese population. From 2011 to 2019, 5254 confirmed malaria cases were reported and treated in Yunnan Province, China. Among them, 4566 cases were imported from other countries, and 688 cases were indigenous from 2011 to 2016. Since 2017, no new local malarial case has been reported in China. Thus, malaria has been completely eliminated in Yunnan Province. However, malaria is detected in overseas travellers on a regular basis, such as visitors from neighbouring Myanmar.Conclusion:Hence, the strategies should be further strengthened to maintain a robust public health infrastructure for disease surveillance and vector control programs in border areas. Such programs should be supported technically and financially by the government to avert the possibility of a malarial resurgence in Yunnan Province.

  • 标签: Malaria Eliminate Southeast asia Yunnan China
  • 简介:Aimedateliminatingallformsdiscriminationagainstwomen,ensuringhumanrightsandfundamentalfreedomsforwomeninallfieldsandrealizingde-factoequalitybetweenmenandwomen,theConventionontheEliminationofAllFormsofDiscriminationAgainstWomenadoptedbytheU.N.GeneralAssemblyisamostsignificantandmostcomprehensivelegaldocumentconcerningtheprotectionofhumanrightsofwomen,whichiscalled'TheCharteroftheHumanRightsofWomen.'ThisthesisreviewstheachievementsandproblemsinthefulfillmentbytheChinesegovernmentofobligationsundertheConventionaftersigningandratifyingit;andalsoputsforwardsomefeasibleapproachesforimprovementthereof.

  • 标签: RIGHTS for WOMEN The CONVENTION on
  • 简介:Ifthegivenequationsaresuchthatthecoefficientsofoneofthevariablesarenumericallyequalinbothequations,itispossibletoeliminatethevariablebyadditionorsubtraction.假设已知的两个方程中有一个变量的系数相等,那么就可以用加法或减法消去一个变量.

  • 标签: 加碱消元法 初中 数学 学习辅导 解题思路 方程
  • 简介:Theeliminationofzig-zagdefectsinpolyimide-coatedsurface-stabilizedferroelectricliquiedcrystal(SSFLC)cellsiscarriedoutbyappliyingalow-frequencyelectricfield.IthasbeenachievedwhenthethicknessofSSFLCcellis3μm.Theopticalspectraltransmittancemeasurementconfirmedthatthereisnochangeoflayerstructure,andthememorycapabilitywasnotimproved.Thedifferenteffectsoflow-frequencyelectricfieldappliedonthedifferentthicknessFLCcellshavebeenobserved.andexperimentalresultswerepresented.

  • 标签: 液晶显示器 Z字形缺陷 铁电体
  • 简介:一个方便、有效的过程被tosylation和硅石胶化在这研究支持的随后的β-消除为酒精的变换开发到石蜡。有在在0℃的pyridine的p-toluenesulfonyl氯化物的白酒的处理负担得起在房间温度在dichloromethane或氯仿与硅石胶化经历β-消除的tosylates,产出有高生产率的石蜡。

  • 标签: 醇类 石蜡 简易转化 甲苯磺酰基化 β-消去反应 二氧化硫
  • 简介:AbstractBackground:A steady progress on schistosomiasis control in the Peoples’ Republic of China (P.R. China) was achieved and broadened into the twelve-year medium and long term national plan (MLNP) which marled the implementation of an integrated control strategy across all endemic areas in P.R. China in 2004. To understand the endemic trends of schistosomiasis to assess the effectiveness of an integrated strategy, we conducted an analysis of schistosomiasis surveillance data spanned from 2005 to 2015.Methods:The schistosomiasis sentinel surveillance data from sentinel sites were collected and analyzed from 2005 to 2015. In these sentinel sites, residents aged 6 years or above were screened annually by indirect hemagglutination assay (IHA), while only antibody positives were followed by stool examination either Kato-katz method (KK) and/or hatching technique (HT). Domestic animals raised in sentinel sites were examined by HT for confirming the infection of schistosomes. Snail investigation was conducted each year through systematic sampling method combined with environmental sampling method. The snails collected from field were tested by microscopic dissection method. The infection rates of schistosomes in residents, domestic animals and snails, as well as the indicators reflecting the snails’ distribution were calculated and analyzed. ANOVA analysis was used to examine the changes of the number of eggs per gram feces in population and Chi-square test was used to examine any change in proportions among groups.Results:A total of 148 902 residents from sentinel sites attended this study and 631 676 blood samples were examined by IHA test during the 11 covered years. The annual average antibody positive rates presented a significant decrease trends, from 17.48% (95% CI: 17.20–17.75%) in 2005 to 5.93% (95% CI: 5.71–6.15%) (χ2= 8890.47, P < 0.001) in 2015. During 2005–2015, the average infection rate of schistosomes in residents declined from 2.07% (95% CI: 1.96–2.17%) to 0.13% (95% CI: 0.09–0.16%), accompanied by significant decrease of infection intensity in population. In 2015, the stool positives were only found in farmers, fishermen and boatmen with infection rate of 0.16% (95% CI: 0.11–0.20%), 0.17% (95% CI: 0–0.50%) respectively. The infection rate of schistosomes in domestic animals dropped from 9.42% (538/5711, 95% CI: 8.66–10.18%) to 0.08% (2/2360, 95% CI: 0–0.20%) from 2005 to 2015. Infections were found in eight species of domestic animals at the beginning of surveillance while only two cattle were infected in 2015. Totally 98 ha of new snail habitats were found, while 94.90% (93/98) distributed in lake and marshland regions. The percentage of frames with snails decreased from 16.96% (56 884/33 5391, 95% CI: 16.83–17.09%) in 2005 to 4.28% (18 121/423 755, 95% CI: 4.22–4.34%) in 2014, with a slightly increase in 2015. Meanwhile, the infection rate of schistosomes in snails was decreased from 0.26% (663/256 531, 95% CI: 0.24–0.28%) to zero during 2005–2015.Conclusions:The infection rate of schistosomes declined significantly, providing evidence that the goal of the MLNP was achieved. Elimination of schistosomiasis as a public health problem defined as WHO was also reached in P.R. China nationwide. Surveillance-response system should be improved and strengthened to realize the final goal of schistosomiasis elimination.

  • 标签: Schistosomiasis Surveillance Infection rate Elimination China