Topology-Based and Event-Oriented Approach to Simulation of Cyber-Physical Systems

A simulation model for cyber-physical systems(CPSs)was presented.The model was developed by the method of combination of topology-based and event-oriented that could be used to simulate systems with routing flexibility,service-selection flexibility and service- mode flexibility overall by integrating the strategies related.The validity of the model has been verified by two extensive experiments.

El Nino and anti-El Nino events in 1854-1987

-Using the COADS data set of sea surface temperature in the Equatorial Eastern Pacific, thirty one El Nino events and twenty four anti -El Nino events were identified for the period from 1854 to 1987. The results were compared with those of the other authors. The El Nino events (or anti -El Nino events ) are classified into two groups according to the timing of occrrence of the events: one starts at the first half of a year, another begins at the second half of a year. Both 1982-1983 and 1986-1987 events fall into the second group, which are characterized by the eastward migration of the positive anomaly of the sea surface temperature and the significant increasing of the anomaly in September or October.

南美洲Oriente盆地斜坡带W区块构造-岩性复合油藏成藏模式及有利区预测

通过岩心观察、地震解释、储层反演、原油地化分析、油源对比、油气运移示踪分析等对南美洲Oriente盆地斜坡带W区块典型构造-岩性复合油藏的成藏规律进行了分析,并指出了下一步的有利勘探方向。研究结果表明:①Oriente盆地斜坡带W区块构造-岩性复合油藏整体为西倾和西南倾单斜构造,局部发育鼻隆,油藏目的层为白垩系Napo组M1ss段,砂体呈北西—南东向,储层厚度大、物性好。②研究区河口湾砂坝控制有利储层分布,W区块平稳的西倾和西南倾单斜鼻隆构造背景与NW—SE走向的泥岩条带配合控制圈闭形成,有效油气运移通道的空间展布控制成藏。③构造-岩性油藏为三阶段成藏模式,早期常规原油充注,中期原油遭受降解,晚期常规原油混合降稠。④W区块南部地区2个泥岩条带的西南部位是W区块构造-岩性复合圈闭的有利发育区。

A Long Lasting and Extensive Drought Event over China in 1876-1878

Between 1876 and 1878 a large-scale drought occurred in China. This is a major meteorological disaster and an extreme climate event despite the cold climate at the end of the Little Ice Age. In this paper the dynamic evolution of the occurrence and development of the drought is reproduced on the basis of historical literature records. These were used to calculate the yearly numbers of drought-hit counties and to determine the spatial distribution in addition with concomitant famine, locust plague and pestilence epidemic for each of the three years. The persistent drought disaster spread over 13 provinces with its center in Shaanxi, Henan and Shanxi provinces, where the continuous non-soaking rain period exceeded 340 days. Conclusively, it is more severe than the worst drought （1928-1930） in the 20th century. This drought disaster of 1876-1878 took place in the descending phase of the 11th sunspot activity period and the start of the 12th period. It also happened during a spell of frequent E1 Nino events and corresponds with an extremely strong E1 Nino.

Heinrich events recorded in a loess-paleosol sequence from Hexigten,Inner Mongolia

We describe the last glaciation climatic history Marine Isotope Stage(MIS, 2-4) from 66.7 ka to 14.5 ka in Hexigten, northeast Inner Mongolia, North China. The climate of the region experienced frequent and significant fluctuations between dry-cold and less dry-cold during the late MIS4. The climate was generally warm and humid during early MIS3(MIS3 c) and late MIS3(MIS3 a), whereas it was cold and dry in middle MIS3(MIS3 b) and during MIS2. In this study, the cold and dry conditions were correlated with a stronger East Asian winter monsoon and strong dune activity; whereas, warm and humid conditions were related to a stronger East Asian summer monsoon(EASM) and weak dune activity. This study establishes six distinct dry and cold intervals during the last glacial period(66.7-14.5 ka) based on optically stimulated luminescence data, multi-proxies record(magnetic susceptibility, grain size analysis, Rb/Sr, SiO2/TiO2) and chemical index of alteration(CIA). The last glacial period may be correlated with Heinrich events 1 to 6 which were further confirmed by comparison with the Hulu cave stalagmites and Greenland ice core records. It is concluded that the study area was substantially affected by the EASM, as compared with the loess-desert transition zone of the Chinese Loess Plateau, especially in MIS3 c and suggested that the East Asian monsoon played a pivotal role in the last glacial period climate and dune activity.

Transparent and anti-fogging AlPO_(4)-5 films constructed by oblique oriented nano-flake crystals

In the present work,transparent and anti-fogging AlPO_(4)-5 films were prepared on glass substrates using a novel developed process.The process entails a simple in-situ sol–gel followed by vapor phase transport.The in-situ sol–gel process was implemented by coating the precursor sols for the synthesis of AlPO4-5 on the glass substrates successively using the spin-coating method.The films and powders scribed from the films were characterized by X-Ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscope(SEM),atomic force microscope(AFM),X-ray photoelectron spectroscopy and transmission electron microscope(TEM).The unique films were composed of oblique oriented nanoflake AlPO_(4)-5 crystals with the thickness of about 20 nm.The formation of nano-flake crystals can be ascribed to the high concentration of the precursors,resulting in the formation of a supersaturation system.The obtained films showed high antifogging performance due to the superhydrophilicity with a water contact angle of lower than 1.0°.The silicone oil contact angle was also low about 8.2°.In addition,heteroatom-substituted AlPO_(4)-5 films showing different colors can be obtained easily by simply adding transition metal ions in the phosphate acid solution during the preparation that can extend the application of the method for different coating demand.

Photo-polymerization of liquid crystalline monomer in oriented liquid crystal phase

A new approach to synthesize liquid crystalline polymer with narrow polydispersity index（PDI） was developed.Photopolymerization of 4-cyanophenyl-4＇-（6-acryloyloxyhexyloxy）benzoate（RM23） in nematic liquid crystals with macroscopic orientation was studied.The effects of the monomer concentration on the molecular weight and PDI of the resulting polymers were studied through gel permeation chromatography（GPC） and polarized optical microscopy.The low PDI of 1.19 and 1.22 was obtained in the reverse and normal modes,respectively.The PDI and molecular weight increased with monomer concentration.

A Diagnostic Analysis of Winter Atmospheric Circulation during the 1982-1983 ENSO Event

In this paper, the winter atmospheric circulation, the convection along the equator and their variations of 1982 and 1983 are investigated. It is suggested that there was a well organized three dimensional structure of anomalies of the atmospheric circulations during 1982 winter which may be related to the variations of the convection in the equatorial region.

社会价值取向对自我社会奖赏加工的影响--来自ERPs的证据

社会价值取向(Social Value Orientation,SVO)是相互依存情境下人们对自己和他人分配结果的一种稳定的社会偏好,按SVO不同可以将个体分为"亲社会取向"和"亲自我取向"个体。已有研究表明SVO影响个体对涉及自我金钱奖赏的结果评价加工,而它如何影响自我社会奖赏加工过程尚不明确。本研究让亲社会取向和亲自我取向被试完成涉及自我社会奖赏(包含社会接纳和自我成就感)的猜牌建议给予任务,同时记录其加工他人对建议的反馈(接受vs.拒绝)和他人最终结果(收益vs.损失)时诱发的脑电成分。结果发现,在建议反馈加工阶段,相比亲自我取向个体,亲社会取向个体在反馈相关负波(FRN)波幅(峰-峰值)和P3平均波幅上,建议被对方接受和被对方拒绝所诱发的波幅差异均显著;在他人最终结果加工阶段,建议被对方拒绝后,对于亲社会取向个体,对方损失诱发的反馈相关负FRN波幅比对方收益诱发的波幅更负,而对方损失诱发的P3波幅小于对方收益诱发的波幅;对于亲自我取向个体,对方损失与收益诱发的FRN波幅无差异,对方损失诱发的P3波幅显著大于对方收益诱发的波幅。这些结果表明社会价值取向调节个体对自我社会奖赏的加工。

单板U型滑雪运动员视觉空间方位知觉的反应抑制--来自ERPs的证据

目的：以单板U型滑雪项目为例,探索运动训练对运动员视觉空间方位知觉影响的认知加工特点,了解运动员与普通人群在视觉空间方位知觉反应抑制的ERPs成分特征上的差异,确定同类项目运动员视觉空间方位知觉反应抑制能力的指向性指标,为科学训练、选材和评估提供依据。方法：选取国家单板U型滑雪运动员8人（运动组）和普通大学生8人（对照组）为研究对象。采用Go-Nogo实验范式诱发受试者视觉空间方位知觉反应的ERPs。结果：1）运动组被试Go刺激的反应时显著低于对照组。2）无论是水平方位还是垂直方位,140~220 ms出现的早期成分N2在Go条件下比Nogo条件下诱发的波幅更大,且垂直方位的顶区电极波幅明显大于其他区域。垂直方位额脑区Fz潜伏期比中央脑区电极Cz、Cpz更短。3）300~420 ms出现的晚期成分P3,水平方位的中央脑区比前额区、顶区波幅更明显,运动组的额区、中央脑区比对照组波幅大。顶区Nogo-P3波幅明显小于Go-P3,垂直方位中央脑区波幅大于其他脑区,运动组的Nogo-P3波幅显著大于对照组,顶区Nogo-P3小于Go-P3波幅。水平方位的脑顶区NogoP3潜伏期长。结论：单板U型滑雪项目运动员在Go/Nogo任务下执行动作时的反应时比普通人更短,运动员对冲突的反应抑制加工能力比普通人强,Nogo-P3的成分特征可以作为测量单板U型滑雪运动员视觉空间方位知觉反应抑制能力的良好指标。

C^4ISR中P-坚持CSMA/CD局域网仿真系统设计与实现

网络仿真是分析网络性能的方法之一。为了控制军用网络的响应时间,通过面向对象分析,采用离散事件仿真方法设计并实现了军用网络仿真系统中的一个局域网的仿真。分析了概率P对网络性能的影响。

DESIGN OF WINDOW BASED AND OBJECT ORIENTED GUI

This paper discusses the design concept and method about window based and object oriented Graphic User Interface(GUI),and describes the definition of each class in detail. It is developed with Watcom C ++ in DOS environment.The GUI can be redeveloped conveniently and effectively by users.It consists of window,popup menu,icon,button and other components.

Breeding of a New Cucumber F_1 Hybrid ‘Oriental Show’

‘Oriental Show’ is a generation of new cucumber variety, with the superi-or inbred line ‘101’ as the female parent and inbred line ‘102’ as the male par-ent. The growth vigor tends to be strong and the first female blossom produces on the 4th or the 5th internode. Fruit is 34 cm long and 32 cm in transverse diameter. Per fruit weighs about 230 g. lt is dark green, densely covered with thorns. lt tastes crisp, containing 167.7 mg/kg Vc, and it is resistant to downy mildew, pow-dery mildew and bacterial angular leaf spot disease. lt is yielding and tolerant to low temperature and weak luminance. The yield can be as high as over 112 443.778 kg/hm^2, and ‘Oriental Show’ is suitable to be cultivated in greenhouses in early spring or solar greenhouses in north China or Henan province.

C^4ISR中p-坚持CSMA/CD的建模与仿真

为了提高军用网络的响应速度,通过面向对象分析,采用离散事件仿真技术对军用网络仿真系统中的p-坚持CSMA/CD局域网建立了排队模型,并实现了网络仿真软件.测试了在各种负载下选取不同p值对冲突次数、延迟、吞吐率等性能指标的影响,其结果与相关理论基本一致,从而为特定网络流量下选取合理的概率p提供了依据.

血浆NT-proBNP水平与不稳定型心绞痛近期预后的关系

目的:探讨血浆N末端-脑钠肽前体(NT-proBNP)水平与不稳定型心绞痛(UAP)患者近期预后的关系。方法:因胸痛住院并经冠状动脉造影检查确诊为UAP的患者52例,分别检测症状发作后18h和症状缓解96h血浆NT-proBNP水平,并计算差值比。对UAP患者随访30天,记录患者主要心血管事件(MACE)的发生情况,并应用受试者工作曲线(ROC)分析差值比对UAP患者发生近期心血管事件的预测价值。结果:发生心血管事件患者的NT-proBNP差值比高于未发生者,差异具有统计学意义(P<0.05)。ROC结果显示,NT-proBNP差值比为0.99时,其预测UAP患者近期发生心血管事件的灵敏度和特异度分别为64.3%和81.8%。结论:NTproBNP差值比可用来预测UAP患者近期心血管事件的发生情况,可作为筛选高危病例的一个指标。

Stratigraphical Time——Correlation and Mass Extinction Event Near Permian——Triassic Boundary in South China

Shaw's method used to correlate 40 sections across the Permo-Triassic boundary in South China is applied in the paper. Two steps are adopted to get an Integral Composite Section (ICS) by synthesizing these data : First , South China is divided into five areas and composite section developed for each area . Then the second step . the Changxing composite section is regarded as a composite standard (CSRS) while the ICS is produced by matching the CSRS with composite sections of the other areas. Three biozones in the Changxingian and two biozones in the Griesbachian can be discerned on the basis of computing Z values in the ICS. These biozones are marked by the Z values which quantitatively represent their time ranges ; therefore , they may increase accuracy of stratigraphic time correlation . The mass extinction at the end of the Permian is an abrupt event that is supported by the relative rate of extinction near the P/T boundary . About 90% of invertebrate species died out by the end of the Permian . The duration of the mass extinction is rather short ,approximately 0.018Ma .

基于改进结构的航空器Event模型碰撞风险分析

为了提高航路容量,科学缩小航空器间隔标准,通过将经典Event模型碰撞盒改进为圆柱体与三棱锥拼接模型,提出了针对航空器在航路飞行阶段对于碰撞风险计算更为精确的改进Event模型。分别从垂向、纵向两个方面入手改进航路碰撞风险公式,并以航路飞行阶段的塞斯纳172,B737-800为算例进行分析。结果表明:改进的Event模型对于小型固定翼飞机的碰撞风险计算结果约为经典Event模型的8.47%,约为椭球体Event模型的33.92%,约为两圆锥体拼接Event模型的50.5%。对于中型客机的碰撞风险计算结果约为经典Event模型的9.36%,约为椭球体Event模型的47.75%,约为两圆锥体拼接Event模型的70.93%。结果表明,论文所提出的改进Event模型有效降低了风险计算冗余,并且相较于以往球体、椭球体、拼接圆锥、拼接棱锥等改进Event模型,精度更高。

Evidence for a Strong Correlation of Solar Proton Events with Solar Radio Bursts

A statistical analysis is made on the correlation between solar proton events with energies >10Mev and solar radio bursts during the four-year period from 1997 November to 2000 November. We examine 28 solar proton events and their corresponding solar radio bursts at 15400, 8800, 4995, 2695, 1415, 606, 410 and 245 MHz. The statistical result shows that there is a close association between solar proton events and ≥3 solar radio bursts occurring at several frequencies, one or two days before. In particular, it is noteworthy that proton events occurring in pairs within the same month are preceded 1-2 days by individual radio bursts and most of the radio bursts of solar flares occur at all eight frequencies. Those 245 MHz radio bursts associated with proton events have intense peak fluxes (up to 67000 sfu). Solar proton events are preceded 1 or 2 days by≥ 3 radio bursts at several frequencies and proton events occurring in pairs within the same month are preceded 1 or 2 days by some individual radio bursts. These correlations may be used for providing short-term or medium-term prediction of solar proton events.

The Role of Government in the Socialization of Old- age Service

In the different stages of the development of the old-age service, the responsibility and function of the government will be different. In the new period, the government should redefine its role in advancing the socialization of the old-age service. The level of socialization of old-age services is not high, the lack of vitality of the pension market, the imperfect system and other problems arise because the government is not clear. The government should deal with the relationship between the main body of the market and avoid the ＇double failure＇ of the government and the market. The government should play a guiding role in the policy, laws and regulations and other aspects of good service work for the social services of the elderly to provide a good development environment.

Neural correlates of short-term perceptual learning in orientation discrimination indexed by event-related potentials

The current work investigated the neural correlates of visual perceptual learning in grating orientation discrimination by recording event-related potentials (ERPs) from human adults. Subjects were trained with a discrimination task of grating orientation in three consecutive training sessions within 2 h. While reaction times (RTs) were shortened gradually across training sessions, the N1 was decreased and the P2 was increased over the parietal and occipital areas. A broadly distributed P3 was increased along with more practices. In addition, the time course of learning reflected in the P2 and P3 amplitudes was in line with the changes of reaction times and exhibited a stable level during later training. The impli- cations of these results to the neural mechanisms subserving perceptual learning were discussed.