警务战术对抗训练中标记弹系统与bb弹系统比较研究

当前,我国公安机关和公安院校开展的战术训练普遍对抗性不强,除特警部门和少数公安院校,各地很少开展如标记弹、bb 弹等形式的对抗训练。本文通过比较标记弹系统和bb弹系统在警务战术对抗训练中的特点与应用,为提高战术训练效果提供理论支持与实践参考。     

基于ITS2条形码序列对新型“香料”毒品植物成分的研究

目的应用DNA条形码片段ITS2对新型毒品样品中的植物成分进行分析。方法提取可疑毒品样本"spike99","K2","7号"中的植物基因组DNA,用ITS2通用引物进行扩增,对扩增产物进行测序,对序列校对拼接,应用BLAST方法在NCBI数据库中比对。结果 "spike 99"、"7号"各得到1条ITS2基因序列,"K2"得到2条ITS2基因序列,分别与紫花苜蓿、大麻、啤酒花、黄蜀葵的ITS2基因序列的同源性为100%。结论应用条形码技术可以成功分析新型毒品中的植物种属,为案件中植物样本的种属鉴定提供方法。     

基于SVM的汉语评论情感分类方法研究

情感分类是一项具有较大实用价值的分类技术．它可以对网上纷繁复杂的信息进行情感倾向标注．为用户提供一个简洁的总结信息,进而为人们制定决策提供帮助,然而目前针对汉语的情感分类开展的工作并不多。提出一种基于SVM机器学习的情感分类方法,并引入基于2-POS模型的句子主观性分析方法,利用SVM进行机器学习,实现汉语评论的情感分类。实验表明这种方法能够有效地判定评论信息的情感倾向。     

电针激活Nrf2/HO-1通路抗帕金森病模型小鼠氧化应激的机制研究

目的 观察电针“风府”“太冲”“足三里”穴对帕金森病(Parkinson’s disease, PD)模型小鼠大脑纹状体中酪氨酸羟化酶(tyrosine hydroxylase, TH)、核因子E2相关因子2(nuclear factor-erythroid 2-related factor 2,Nrf2)、血红素加氧酶-1(heme oxygenase-1,HO-1)水平的影响,探讨电针治疗PD的可能机制。方法 将30只小鼠按随机数字表法分为对照组、模型组和电针组,每组10只。模型组、电针组小鼠按照30 mg/kg腹腔注射1-甲基-4-苯基-1,2,3,6-四氢吡啶(1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, MPTP)制备PD小鼠模型。电针组小鼠给予“风府”“太冲”“足三里”穴电针干预,每日1次,每次30 min,连续干预12 d。其余两组小鼠不予任何干预。采用爬杆实验和悬挂实验观察3组小鼠行为学改变,旷场实验观察小鼠自主运动总路程,免疫组织化学法检测小鼠大脑纹状体中TH表达水平,实时荧光定量PCR法检测小鼠大脑纹状体中Nrf2、超氧...     

大鼠挫伤骨骼肌中M1/M2型巨噬细胞时间相关性研究

目的 研究大鼠骨骼肌挫伤后M1/M2型巨噬细胞浸润的动态变化规律结合组织学改变建立损伤时间推断方法.方法 建立大鼠骨骼肌挫伤模型,挫伤后6h、12h、24h、36h、48h、60h、72h、96h、144h、216h、336h为实验组,对照组不进行任何处理.采用HE染色法和免疫荧光多重染色方法观察骨骼肌挫伤后修复规律,...     

鸡IL-2和IL-15基因真核表达质粒对禽流感疫苗的免疫增强作用

根据GenBank中的鸡IL-2和IL-15序列设计了2对引物,采用RT-PCR法从山地乌骨鸡外周血淋巴细胞RNA中克隆了IL-2和IL-15基因,与pcDNA3.1连接构建了真核表达质粒pDNAIL-2和pDNAIL-15,研究了其对禽流感灭活疫苗的免疫增强作用。结果显示,免疫后第10d,pDNAIL-15 AI灭活疫苗组和pDNAIL-2 AI灭活疫苗组HI抗体水平显著高于AI灭活疫苗组(P<0.05)。免疫后第10 d,pDNAIL-15 AI灭活疫苗组CD4 淋巴细胞百分含量显著高于pDNAIL-2 AI灭活疫苗和AI灭活疫苗组(P<0.05);免疫后第23 d,pDNAIL-2 AI灭活疫苗组CD4 淋巴细胞百分率显著高于pDNAIL-15 AI灭活疫苗和AI灭活疫苗组(P<0.05)。证实pDNAIL-2和pDNAIL-15能提高禽流感灭活疫苗的免疫效果。     

猪生殖与呼吸综合征病毒和猪圆环病毒2型共感染对猪外周血天然免疫细胞含量的影响

将猪生殖与呼吸综合征病毒(PRRSV)和猪圆环病毒2型(PCV2)单感染和共感染的6周龄仔猪,于感染前和感染后第3、7和10 d,采用血常规法、SWC3a单色流式细胞术以及CD3/CD4/CD8三色流式细胞术分析了感染猪外周血中白细胞、粒细胞、单核细胞、NK细胞、γδT细胞的含量。结果,感染后第3 d和第7 d,PRRSV感染组、PCV2感染组以及PRRSV+PCV2共感染组猪的白细胞、单核细胞、粒细胞、NK细胞、γδT细胞总数显著下降,并且共感染组比单感染组下降更加严重。结果表明,PRRSV+PCV2共感染对仔猪外周血天然免疫细胞的影响具有协同效应,意味着在感染早期可导致更加严重的先天免疫抑制。     

The Politics of the Third Person

Abstract

Against the enthusiasm for dialogue and deliberation in recent democratic theory, the Italian philosopher Roberto Esposito and French philosopher Jacques Rancière construct their political philosophies around the nondialogical figure of the third person. The strikingly different deployments of the figure of the third person offered by Esposito and Rancière present a crystallization of their respective approaches to political philosophy. In this essay, the divergent analyses of the third person offered by these two thinkers are considered in terms of the critical strategies they employ. Contrasting Esposito’s strategy of “ethical dissensus” with Rancière’s strategy of “aesthetic dissensus,” it is argued that Esposito’s attempts to recruit the figure of the third person to dismantle the dispositif of the person are politically (if not philosophically) problematic, while Rancière’s alternative account of the third person is more promising for political theory and practice.     

SPF雏鸡感染网状内皮组织增殖病病毒后白细胞介素2和干扰素诱生活性的变化

对1日龄SPF雏鸡人工感染网状内皮组织增殖病病毒(REV)后,胸腺T淋巴细胞白细胞介素2(IL-2)诱生活性于14～49 d极显著低于对照组(P＜0.01);脾T淋巴细胞IL-2诱生活性于14 d明显低于对照组(P＜0.05),感染后21～49 d极显著降低(P＜0.01);脾淋巴细胞干扰素(IFN)的诱生活性于感染后7～49 d极显著降低(P＜0.01).提示SPF雏鸡受REV感染后机体免疫器官的分子免疫调节机能明显降低或发生障碍.     

Russia: A Country with an Unpredictable Past

Russia is a key player in the Kyoto process, and the fate of the Protocol itself heavily depends on future developments in the country, in particular in its energy sector. This article analyses the contradictory and complex relationships between carbon dioxide emissions, gas exports to Western Europe and the energy security of Russia. The paper reviews emerging trends in the energy sector of Russia that will have a long-term impact on these three parameters and assesses the possible influence of these trends on the implementation of the Framework Convention on Climate Change and the Convention on Long-range Transboundary Air Pollution in Russia. Proceeding from the latest developments in the Russian energy scene, the author tries to forecast how Russia will integrate into the international community in the energy sphere. The study concludes that gas export commitments to Europe will be met despite the serious problems in the domestic gas sector, that energy saving in Russia is the most feasible way of finding a compromise between the three parameters, and that enhancing the energy security of Russia might have rather controversial consequences for Europe.