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Case study scenarios in site selection of hazardous material facilities based on transportation preferences

Journal of Modern Transportation 2019年第4期27卷 317-333页

作者： babak mehran Musharraf Ahmad Khan Mina mehran Hyukjae Roh Satish Sharma Department of Civil Engineering University of Manitoba66 Chancellors CirWinnipegMB R3T 2N2Canada Faculty of Engineering and Applied Science University of Regina3737 Wascana PkwyReginaSK S4S 0A2Canada City of Regina 2476 Victoria AvenueReginaSK S4P 3C8Canada

A methodology is proposed to evaluate and rank potential sites for facilities dealing with hazardous materials(HAZMAT).The proposed methodology incorporates HAZMAT route planning into facility siting while considering transportation preferences and *** area of interest is divided into smaller zones representing potential sites for a HAZMAT facility.A multimodal transportation network including railways and roads is considered for transportation of *** zone is evaluated based on its accessibility from a set of selected points of interests(POIs),which are defined as potential origin/destination points for transportation of *** shortest routes between each POI and potential zones are evaluated based on a cost function which can accommodate multiple criteria to determine the associated disutility for each potential ***,zones are ranked based on their cumulative disutility *** proposed analysis method is quantitative,and at the same time it is adequately flexible to allow inclusion of subjective *** of the proposed methodology is demonstrated for identifying optimal locations for a HAZMAT facility(e.g.,a nuclear facility)using the Canadian province of Saskatchewan as an *** scenarios were evaluated including(1)all network segments and POIs were treated equally,(2)network segments were rank ordered based on their functional classification while POIs were treated equally and(3)network segments were rank ordered based on their functional classification with preferences given to specific POI(s).

关键词： HAZMAT transportation Site selection Route planning Shortest path analysis

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Investigation of the factors affecting the consistency of short-period traffic counts

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Journal of Modern Transportation 2017年第3期25卷 150-162页

作者： Solomon Yadessa Kenno Prasanta K.Sahu babak mehran Satish Sharma Saskatchewan Ministry of Highways and Infrastructure Department of Civil Engineering Birla Institute of Technology and Science Pilani(BITS Pilani) Faculty of Engineering and Applied Science University of Regina

The main intent of this study is to investigate the accuracy of short-duration traffic counts conducted during winter months. The investigation is based on 11-year sample data collected using permanent traffic counters at various locations in Alberta, Canada. Four types of road sites： commuter, regional commuter, rural long-distance, and recreational sites are studied. The sample data consti- tute six different durations of counts （12-, 24-, 48-, 72-, 96-h, and 1 week） taken during summer and winter months. The coefficient of variation （CV） is used as the relative measure of deviation for counts of different dura- tions to measure the accuracy of short-period traffic counts. The study results indicate that 48-h count seems to be the most cost-effective counting interval during both summer and winter months. It is also found that the lowest values of CV result for counts taken at commuter sites, and the highest values are observed for recreational sites. Frequent changes in temperature and other weather events cause significant variation in traffic volume, which results in an increase in CV values for counts taken during winter months. The application of an adjustment factor to remove the effect of cold and snow from short-period counts is also included in this study. Introduced adjustment factors can reduce the values of CV for all counts taken during winter months. The findings of this study can lead highway agencies to improve the cost-effectiveness of their short- period traffic counting programs.

关键词： Short-period traffic counts Average annualdaily traffic - Design hourly volume

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Effects of a Brine Discharge over Bottom Polychaeta Community Structure in Chabahar Bay

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Journal of Life Sciences 2013年第3期7卷 302-307页

作者： Seyyed Mohammad Bagher Nabavi Mohadese Miri babak Doustshenas Ali Reza Safahieh mehran Iran Department of Marine Biology University of Marine Sciences and Technology Khoramshahr 64119-43175 Khozestan ProvinceIr an Department of Marine Biology University of Chabahar Maritime and Marine Science Chabahar 99717-56499 Systan andBalochestan Province 1ran

The brine discharge from desalination plants affects the benthic communities. Polychaetes are indicators to assess marine pollution. The aim of this study was to examine the effects of brine discharge over softbottom polychaete community in Chabahar Bay. Forty-two sediment samples were collected from seven stations in pre summer monsoon （April 2011） and post winter monsoon （October 2011） using Van Veen grab sampler. Changes in the polychaeta data assemblages were analyzed using univariate and multivariate techniques. Thirty-one polychaete species were identified with the highest abundance in station 6 in pre monsoon period and the lowest abundance in station 1 in pre monsoon. The results showed that the abundance, richness and diversity indices were decreased in the stations near the discharges area comparing to control stations far from the brine discharges zone. CCA （Canonical correspondence analysis） showed that salinity and temperature have influenced the community structure of polychaeta.

关键词： Brine discharge polychaeta Chabahar Bay.

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Silicon carbide resonant tuning fork for microsensing applications in high-temperature and high G-shock environments

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Engineering Sciences 2012年第5期10卷 36-41页

作者： David R Myers Kan Bun Cheng babak Jamshidi Robert G Azevedo Debbie G Senesky Li Chen mehran Mehregany Muthu B J Wijesundara Albert P Pisano Department of Mechanical Engineering Berkeley Sensor and Actuator Center University of CaliforniaBerkeley California 94720USA Department of Electrical Engineering and Computer Science Cleveland Case Western Reserve University Cleveland Ohio 44106 USA)

We present the fabrication and testing of a silicon carbide （SiC） balanced mass doublended tuning fork that survives harsh environments without compromising the device strain sensitivity and resolution bandwidth. The device features a material stack that survives corrosive environments and enables high-temperature operation. To perform hightemperature testing, a specialized setup was constructed that allows the tuning fork to be characterized using traditional silicon electronics. The tuning fork has been operated at 600°C in the presence of dry steam for short durations. This tuning fork has also been tested to 64 000 G using a hard-launch, soft-catch shock implemented with a light gas gun. However, the device still has a strain sensitivity of 66 Hz/μe and strain resolution of 0. 045 μe in a 10 kHz bandwidth. As such, this balanced-mass double-ended tuning fork can be used to create a variety of different sensors including strain gauges, accelerometers, gyroscopes, and pressure transducers. Given the adaptable fabrication process flow, this device could be useful to micro-electro-mechanical systems （MEMS） designers creating sensors for a variety of different applications.

关键词： MEMS SiC thermal effects double ended tuning fork (DETF) harsh environment high temperature high shock inertial strain sensors

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