Modeling of Operators’ Workload in a Nuclear Power Plant

Accidents in a nuclear power plant are coped with by operators in the main control room （MCR）. An analysis of the workload of operators in a MCR after the happening of initiating events is helpful to the alleviation of human errors and to the promotion of training efficiency. This paper establishes a framework of how man is located in a man-ma- chine interface of a nuclear power plant （NPP） as well as a simulation of the man-machine scenario in accidents in NPPs, including the simulation of the operators＇ task and cognitive work and the establishment of task analysis. On the basis of the above, a model of the dynamic changes of the operators＇ tasks is constructed and a computation of operators＇ workload is conducted.     

The response of collision speed caused by the large bus to new flexible barrier

In order to study the response of collision speed caused by the large bus to new flexible barrier, in this paper, with the large bus as the carrier, the full-scale impact tests between flexible barrier and vehicle with the impact velocities of 40 km/h and 60 km/h were carried out separately, following the procedures of the test preparation, test processing, data acquisition, etc, which were based on the test platform of the Large Structure Crash Testing Laboratory of Changsha University of Science and Technology. The important test results which contain the damage of vehicles and barrier, the moving locus of vehicle, the occupant risk index, the maximum dynamic deformation, etc, were obtained through the analysis under the different collision speeds. These provide the necessary reference basis for the further research on the structure topology optimization and improve the comprehensive constraint performance to the flexible barrier.     

Experimental study on stability control technology of surrounding rock of deep roadways in coal mine

In order to solve effectively the problems of deep mining with safety and high efficiency, the multi- pie factors influencing the stability of deep rock roadway and technical problems are analyzed in the light of the severe situation of effective mining for deep coal resource, and the stability control methods for deep rock road- way are provided, which are based on the idea of combined support with separated steps and integral control of surrounding rock of deep rock roadway. The suggested methods were applied to a deep rock roadway with -648 m depth in Gubei coal mine of Huainan area. The field test was carried out and the in-situ monitoring was imple- mented, and the support scheme was optimized and adjusted to improve the stability of the surrounding rock of the roadway based on the feedback analysis. The results showed that the stability can be improved greatly by the provided control methods tbr deep roadway. The present methods lbr stability control of deep rock roadway can be used to other deep rock roadways with the similar conditions.     

Integrated development and industrial application of high sour natural gas purification technology

Aiming at acute characteristics of flammability, explosibility, causticity and leakiness of high sour nat- ural gas, giving full consideration to local natural conditions in Sichuan Province and starting with purification pro- cess, the paper analyzed process configurations, energy utilization and conservation, safety and environment pro- tection measures. The integrated technology and engineering scheme for high sour natural gas purification was es- tablished and successfully used in industrial application.     

Safety analysis and control of blasting mining area adjacent to infrastructure

Systematic analysis of influence of blasting vibration on bridges, tunnels, slopes and the mechanical relationships between each other were drawn based on the example of safety argument between blasting mining area and protected objects. The safety argument methods and technological means of controlling dangerous and harmful factors were proposed by the application of principle of risk analysis. And standard control system was established based on controlling the blasting parameters of division of blasting area.     

英国安全生产行政许可制度初探

从职业安全健康立法、机构和安全生产行政许可的范围、法律依据、实施主体等方面研究了英国的职业安全监管体系和安全生产行政许可制度;总结提出英国设立安全生产行政许可的四大基本原则,即高风险许可原则、企业主体责任原则、目标设定型原则和监管有效性原则。从许可的种类、范围、法律依据和实施主体四个方面,进行了中英安全生产行政许可比较,分析了异同之处。认为应学习借鉴英国的先进经验和做法,不断完善我国安全生产监管监察体制和安全生产行政许可制度。     

转基因食品利弊探讨

食品安全是当前社会关注的重要议题,转基因食品又是食品安全的重要组成部分。重庆工商大学翠湖博士论坛对什么是转基因食品、转基因食品的优点和缺点;学术界对转基因食品安全性的态度,安全性和营养学评价,伦理和安全争议以及贸易争端,基因食品安全的法律应对等一系列问题进行了深入的探讨和研究。     

我国道路交通安全的现状与改善对策

通过对日本、美国、英国、法国、意大利和德国等经济发达国家过去几十年道路交通安全状况发展历程的分析，提出并讨论以汽车为主要交通工具的现代道路交通系统、交通安全状况变化的基本规律。在此基础上，讨论与分析了我国现代道路交通系统发展状况与道路交通安全现状，最后讨论了我国近期进一步改善道路交通安全状况的基本对策。     

劳动安全监管体制的国际经验比较与借鉴

文章对美、英、德等主要发达国家的劳动安全监管体制进行了介绍，对其劳动安全监管中的成功经验加以分析、借鉴，对我国劳动安全监管体制进一步改革提出了相应对策。     

GripTester摩擦系数仪应用研究

随着我国高速公路的发展,路面摩擦性能对保证行车安全起着更加重要的作用,而采用先进的摩擦系数测量设备也就显得非常关键。本文介绍了英国新型路面摩擦系数检测设备GripTester的组成及其设计特点,并较详细地分析了GripTester的试验结果。     

基于VPN技术的数据中心系统管理模式和安全策略设计

传统的数据中心系统管理安全模式存在高风险的安全隐患,而VPN是一种建立在开放的Internet并适合于系统管理的安全技术.通过对传统数据中心系统管理方式的问题分析,提出了基于VPN技术的系统管理模式,并以此设计出基于角色的安全策略,解决了传统管理模式安全性问题,通过在重庆工商大学数据中心的部署和实施,验证了该模式的系统管理安全性.     

Role of Ferrel cell in daily variability of Northern Hemisphere Annular Mode

The Northern Hemisphere Annular Mode(NAM) represents the zonally symmetric planetary-scale atmospheric mass fluctuations between middle and high latitudes, whose variations have shown a large impact on other components of the climate system. Previous studies have indicated that the NAM is correlated with the Ferrel cell in their monthly or longer timescale variability.However, there have been few studies investigating their connections at daily timescale, though daily variability of NAM has been suggested to be an important component and has significant implication for weather forecast. The results from this study demonstrate that variability of the Ferrel cell leads that of the NAM by about 1–2 days. This statistically identified temporal phase difference between NAM and Ferrel cell variability can be elucidated by meridional mass redistribution. Intensified(weakened)Ferrel cell causes anomalously smaller(larger) poleward mass transport from the middle to the high latitudes,resulting in an increase(a decrease) in mass in the middle latitudes and a decrease(an increase) in the high latitudes.As a consequence, anomalously higher(lower) poleward pressure gradient forms and the NAM subsequently shifts to a positive(negative) phase at a time lag of 1–2 days. The findings here would augment the existing knowledge for better understanding the connection between the Ferrel Cell and the NAM, and may provide skillful information for improving NAM as well as daily scale weather prediction.     

Resting state brain default network in patients with motor aphasia resulting from cerebral infarction

To explore the brain default mode network （DMN） in patients with motor aphasia resulting from cere- bral infarction, we used resting state functional magnetic resonance imaging （fMRI） to investigate the possible neural mechanism. Thirteen patients with motor aphasia resulting from cerebral infarction and ten matched controls were selected in this study. All subjects were examined using resting state fMRI. We chose the posterior cingulate cortex as the region of interest and then used functional connectivity analysis to calculate the DMN functional connectivity and analyze differences in the functional connectivity between the two groups. Compared with normal controls, aphasia patient group showed a significantly decreased functional connectivity in bilateral medial frontal gyrus, superior frontal gyrus, middle frontal gyrus, middle temporal gyrus, precuneus and cuneus. The aphasia patient group showed increased functional connectivity mainly in bilateral medial frontal gyrus, middle frontal gyrus, inferior frontal gyrus, precentral gyrus, insula. The DMN in cerebral infarction motor aphasia patients showed significantly decreased functional connectivity in the resting state. The DMN most likely plays an important role in motor aphasia resulting from cerebral infarction. Furthermore, functional connectivity inthe brain regions surrounding the left and right Broca＇s areas was significantly enhanced due to compensatory mecha- nisms. This may be helpful for the recovery of language function in cerebral infarction patients with motor aphasia.     

An observational study of snow aging and the seasonal variation of snow albedo by using data from Col de Porte,France

An 18-year long （1993-2011） comprehensive dataset of snow and meteorological variables from Col de Porte, France is used to analyze the variation of shortwave broadband albedo with elapsed time after snowfalls （snow aging） during each snow season. The effects of air temperature, snow surface temperature and snow depth on snow albedo are investigated. An index based on the accumulation of air temperature over several consecutive days with daily mean higher than 2.5 ℃ is proposed to divide each snow-covered period into a dry and the following wet snow season when this index reaches 18 ℃. The results indicate that snow surface albedo decreases exponentially with time in both dry and wet snow seasons. Snow albedo reduction with snow aging is small at low surface temperature and the reduction rate increases with the rise of surface temperature. However, the reduction rate is widely scattered within the observed range of temperature, implying a loose relationship between snow albedo and snow surface temperature. Snow albedo in wet snow season is generally smaller and decreases faster than in dry snow season. For Col de Porte site, snow depths to effectively mask the underlying surface are 21 and 33 cm in dry and wet snow season respectively.     

The success of the prediction of Haicheng earthquake and the negligence of the Tangshan earthquake

The success of the prediction of Haicheng earthquake and the failure of the prediction of Tangshan earthquake were both well known in the world. What happened, why such a strong earthquake as occurred in Haicheng had been predicted successfully and with a small loss of lives and property？ Why a successively strong earthquake about a year later in a region not so further was failure in the imminent stage of prediction and there were so many fatalities and a great degree of property？ The author addresses these points based on these true experiences including the first hand experiences leading up to, during, and following these two earthquarter. In addition, he also introduced some seimic phenomena which he had seen after Chi-chi earthquake in Taiwan.     

Multi-criteria assessment of offshore wind turbine support structures based on dynamic property optimization

Increasing size of wind turbine and deep water deployment have raised the issue of appropriate selection of the most suitable support structure to make offshore wind energy cost competitive.The paper presents an optimization methodology for decision making process of bottom mounted supports of offshore wind turbines （OWTs） through reasonable engineering attributes derivation.Mathematic models of support structures are reduced by the generalized single-degree-of-freedom theory with relatively fewer structural parameters.Soft-stiff design optimization based on dynamic properties of OWTs is performed for monopile and lattice supports with different wind turbines,water depth and hub height.Attributes of support structures,wind turbines and environment conditions are applied in the multi-criteria decision making method——TOPSIS for benchmarking of those options.The results illustrate the effectiveness of the proposed optimazation methodology combined with economical and environmental attributes together.     

Zircon U-Pb dating and Lu-Hf isotope study of intermediate-mafic sub-volcanic and intrusive rocks in the Lishui Basin in the middle and lower reaches of Yangtze River

Eight Mesozoic sub-volcanic and intrusive rocks in the Lishui Basin have been selected for zircon U-Pb dating and Lu-Hf isotopic analysis. The Laohutou, Datongshan,Daweizhuang, Yeshanao, Yanwaqiao, Xibeishan, Changshantou and Jianshan porphyrites yield concordant early Cretaceous ages of 130.5 ± 1.6 Ma, 136.0 ± 3.4 Ma, 132.7 ±2.7 Ma, 127.0 ± 1.9 Ma, 129.4 ± 1.7 Ma, 133.2 ± 2.1 Ma,131.1 ± 2.3 Ma and 127.4 ± 1.8 Ma, respectively. Zircon eHf(t) values for these rocks range from-3.54 to-9.11, mostly between-3.54 and-5.93, suggesting sources similar to those for coeval igneous rocks in other volcanic basins along the middle and lower reaches of Yangtze River. Considering the geochemical characteristics of coeval magmatic rocks in the middle and lower reaches of Yangtze River and its adjacent areas, this paper proposes a model of slab rollback to explain the Mesozoic magmatism in the east-central part of China continent. In the middle-late Jurassic to early Cretaceous(170–135 Ma), the Pacific plate started to subduct beneath the Eurasian continent, producing a compressive tectonic setting,and magmatism progressed from coast to the inland. The magmas of this period were derived mostly from partial melting of ancient crust. After *135 Ma, the subduction weakened, and the rollback of the subducted Pacific plate produced an extensional environment. This led to the formation of volcanic basins, the partial melting of enriched mantle sources and less ancient crust, and the intrusion of voluminous intermediate-mafic igneous rocks.     

On extra neutral and charged Higgs bosons at the LHC

The properties of 125 GeV new particle, which was discovered in 2012 at the Large Hadron Collider （LHC）, are found to be consistent with those of the Higgs boson in the standard model （SM）. Hereafter the new particle is dubbed as SM-like Higgs boson. However there is still spacious room for physics beyond the SM （BSM） due to the limited energy and luminosity of the LHC. With more data, experiments will scrutinize whether the new particle is indeed the SM one or not. At the same time, one believes that discovery of the SM-like Higgs boson is just the start of the new era of particle physics. The predominant topic is whether there are other new Higgs bosons as speculated in various BSM models. In this short review, we will describe the current status of Higgs physics at the LHC and several BSM models which contain more Higgs sectors. In literatures, there are numerous studies on extended Higgs sector and a comprehensive review is beyond the scope of this review. Instead, we will present two latest studies on Higgs physics： （1） how to detect the charged Higgs boson and measure tan β after including the top polarization information, and （2） how to discover the extra neutral Higgs boson via the pair production of SM-like Higgs boson.     

Feasibility study of the transient electromagnetic method for chamber blasting misfire detection and recognition

In this paper, transient electromagnetic method was used to carry out the feasibility study on the de- tection and recognition of chamber blasting misfire. Firstly, an electromagnetic background field was estab- lished in the test; secondly, a benign conductor was preset in the chamber, and then the background field was eliminated after the electromagnetic field was measured; thirdly, the transient electromagnetic field was mea- sured again after blasting; at last, the chamber blasting misfire was detected and recognized by comparing the change of eddy current field of the preset benign conductor before and after blasting. The test results showed that： When the buried depth of aluminum box target was no more than 30 m, transient electromagnetic method can clearly identify the position of the aluminum box; when the buried depth of aluminum box was more than 30 m, the buried depth and position of the aluminum box was not sure due to the unknown level of secondary eddy current field generated by aluminum box     

Reliability analysis on bolt support structure of coal roadway under the influence of mining

Based on the features of the serious deformation of coal roadway, many random variables of the mechanics of the surrounding rocks and the influence of mining, the reliability analysis model of the support structure of coal roadway under the influence of mining is established, and the calculating formulas of reliability of the support structure is obtained with the engineering structure reliability theory. And the reliability is calculated based on the method of Monte Carlo to the coal roadway which is exampled on the influence of mining or not. The relationship between support parameters and reliability, the mining influence coefficients and reliability is established, which provides theory foundations for the design of the coal roadway bolt support.