利用透视图进行高速公路优化设计

对高速公路设计存在的不足进行了分析,从透视图的原理出发,提出了利用各种透视图进行高速公路优化设计的方法和措施,建议加大利用透视图的力度。     

瞬时预防维修的可修系统的维修更换策略

研究了具有预防维修的单部件一个修理工的可修系统的维修更换策略。假定预防维修能修复如新，而故障维修修复非新。引入单调过程，以系统的故障次数N为更换策略，以系统预防维修的时间间隔T为维修策略，选择最优的（N^＊，T^＊）使系统经长期运行后单位时间内的期望收益最大。     

RIBA在慢性丙型病毒性肝炎中的应用价值

采用含ＨＣＶ三种抗原（Ｃ_（２２），Ｃ_（３３），Ｃ_（１００））的重组免疫印迹试验（ＲＩＢＡ）检测了７１例抗－ＨＣＶ阳性（ＲＩＡ－２法）的慢性非甲非乙型肝炎患者血清并与ＨＣＶＲＮＡ结果进行了比较。ＲＩＢＡ阳性５６例，可疑８例，对应ＨＣＶＲＮＡ检出率分别为９４．６４％（５３／５６）和３７．５％（３／８），ＲＩＢＡ阴性的７例均未检出ＨＣＶ　ＲＮＡ。ＨＣＶＲＮＡ阳性病例中ＲＩＢＡ多为阳性，可疑仅占５．３６％（３／５６），无１例阴性。可见，ＲＩＢＡ阳性即表示ＨＣＶ感染且存在病毒血症，ＲＩＢＡ可作为第二代ＲＩＡ或ＥＬＩＳＡ查抗－ＨＣＶ的确证实验。     

Stability of a Class of Linear Systems on Hilbert Space

Thelinearcontrolsystemunderstudyisddtx(t)=Ax(t) Bu(t), t>0x(0)=x0,(1)whereAisthegeneratorofanexponentiallystableC semigroupT(t)inaHilbertspaceX, andBisaboundedoperatorfromtheHilbertspaceYtoX.Eq. (1) hasreceivedmuchattentionunderthehy pothesisthatAgenerate…     

柴胡总皂甙对戊四氮慢性点燃大鼠海马γ-氨基丁酸表达的影响

目的研究柴胡总皂甙对戊四氮(PTZ)慢性点燃癫痫模型大鼠海马区γ-氨基丁酸(GABA)表达的影响。方法48只健康SD大鼠被随机均分为6组,即空白对照组(A组)、生理盐水组(B组)、丙戊酸钠(VPA)组(C组)和柴胡总皂甙高、中、低三种剂量组(D组、E组、F组)。除A组不做处理外,其他各组采用腹腔注射PTZ慢性点燃造模,造模同时给予VPA、柴胡总皂甙等不同处理因素,连续4周后取脑组织切片进行GABA免疫组化染色,从阳性细胞数、灰度值分析结果。结果B组海马CA1、CA2、DG区的阳性细胞数高于其他各组(P<0.05),而各区阳性细胞灰度值低于其他各组(P<0.05)。结论柴胡总皂甙可以影响PTZ点燃大鼠海马的GABA水平,发挥抑制PTZ对大鼠点燃的作用。     

浅谈智能座舱的“一芯多屏”

随着汽车智能化、网联化水平提高,汽车座舱逐渐向以人机交互为核心、多屏联动的智能座舱发展。在芯片研发制造、虚拟化技术大力发展下,在一颗性能强大芯片上运行多个车载操作系统,同时驱动多个显示屏的"一芯多屏"智能座舱方案成为智能座舱的发展趋势。     

中国游艇会何去何从

具有丰富的水上活动资源这是游艇会发展的外在条件。     

双支柱小水线面双体船阻力理论预报

根据线性兴波理论推导了双支柱小水线面双体船兴波阻力公式。粘性阻力采用传统的经验公式。编制了阻力预报软件。对某实船SWATH2进行了阻力计算，给出了计算结果。     

连拱隧道无中导洞施工技术探讨

介绍黄（陵）延（安）高速公路羊泉沟隧道Ⅲ类围岩段采用的双连拱隧道无中导洞施工技术,及施工中采用的排水、临时支护和现场监控量测等工艺,为无中导洞施工双连拱隧道提供了一个成功实例.     

Application of data fusion method to fault diagnosis of nuclear power plant

The work condition of nuclear power plant (NPP) is very bad, which makes it has faults easily. In order to diagnose the faults real time, the fusion diagnosis system is built. The data fusion fault diagnosis system adopts data fusion method and divides the fault diagnosis into three levels, which are data fusion level, feature level and decision level. The feature level uses three parallel neural networks whose structures are the same. The purpose of using neural networks is mainly to get basic probability assignment (BPA) of D-S evidence theory, and the neural networks in feature level are used for local diagnosis, D-S evidence theory is adopted to integrate the local diagnosis results in decision level. The reactor coolant system is the study object and we choose 2# steam generator Utubes break of the reactor coolant system as a diagnostic example, The experiments prove that the fusion diagnosis system can satisfy the fault diagnosis requirement of complicated system, and verify that the fusion fault diagnosis system can realize the fault diagnosis of NPP on line timely.