peak hour
Can 'ice batteries' cool down our soaring energy demands?
Breakthroughs, discoveries, and DIY tips sent every weekday. Researchers at Texas A&M University are perfecting a deceptively simple solution to our increasingly overburdened energy grid: ice-cooled buildings. This approach, known as thermal energy storage or sometimes referred to colloquially as "ice batteries," uses energy to freeze liquid overnight, when most people are asleep and electricity demand is lower. That stored ice is then melted to help cool building temperatures during peak hours. If successful, the end result is reduced electricity use for air conditioning during the day, which could decrease overall energy demand and help lower costs.
Tinder's busiest swiping day is on January 2nd - with peak hours from 7pm-10pm
Dating apps and online websites are plagued with fraudulent profiles, known as'catfishes'. 'Catfishing' originated as a term for the process of luring people into false relationships, however, it has also come to encompass people giving out false information about themselves more generally. These profiles often use images of another person to allow users to pretend to be someone else in order to get a date, or scam money from a lonelyheart. This is probably the most valuable tool for catching out a catfish and can be done via Google. To kickstart the process, people need only right-click the photos that are arousing their suspcions, copy the URL and paste it into images.google.com.
A Deep-Learning Based Optimization Approach to Address Stop-Skipping Strategy in Urban Rail Transit Lines
Javadinasr, Mohammadjavad, Parsa, Amir Bahador, Abolfazl, null, Mohammadian, null
Different passenger demand rates in transit stations underscore the importance of adopting operational strategies to provide a demand-responsive service. Aiming at improving passengers' travel time, the present study introduces an advanced data-driven optimization approach to determine the optimal stop-skip pattern in urban rail transit lines. In detail, first, using the time-series smart card data for an entire month, we employ a Long Short-Term Memory (LSTM) deep learning model to predict the station-level demand rates for the peak hour. This prediction is based on four preceding hours and is especially important knowing that the true demand rates of the peak hour are posterior information that can be obtained only after the peak hour operation is finished. Moreover, utilizing a real-time prediction instead of assuming fixed demand rates, allows us to account for unexpected real-time changes which can be detrimental to the subsequent analyses. Then, we integrate the output of the LSTM model as an input to an optimization model with the objective of minimizing patrons' total travel time. Considering the exponential nature of the problem, we propose an Ant Colony Optimization technique to solve the problem in a desirable amount of time. Finally, the performance of the proposed models and the solution algorithm is assessed using real case data. The results suggest that the proposed approach can enhance the performance of the service by improving both passengers' in-vehicle time as well as passengers' waiting time.
Logistics Startups Bank On AI and ML To Up Efficiency
With the advent of Industry 4.0, the global economy is fast embracing a series of smart new-age technologies that promise to revolutionise every field down to the last sector: from manufacturing, services to supply chain. Be it healthcare, retail, e-commerce or even legal processes, there is hardly any segment left untouched by the revolutionary impact of artificial intelligence (AI), machine learning (ML) and Big Data. The logistics sector that in many ways forms the backbone of the economy by ensuring seamless movement of goods and supplies is also experiencing sweeping changes with the advent of these smart digital technologies. Evidently, Industry 4.0 is not feasible without smart logistics and supply chain management which is crucial to building a better connected ecosystem across sectors. Retail bigwigs such as Walmart and Amazon are already investing heavily in supply chain automation starting with deployment of robots in fulfilment centres as well as warehouses.
Balancing the Tradeoff between Profit and Fairness in Rideshare Platforms During High-Demand Hours
Nanda, Vedant, Xu, Pan, Sankararaman, Karthik Abinav, Dickerson, John P., Srinivasan, Aravind
Rideshare platforms, when assigning requests to drivers, tend to maximize profit for the system and/or minimize waiting time for riders. Such platforms can exacerbate biases that drivers may have over certain types of requests. We consider the case of peak hours when the demand for rides is more than the supply of drivers. Drivers are well aware of their advantage during the peak hours and can choose to be selective about which rides to accept. Moreover, if in such a scenario, the assignment of requests to drivers (by the platform) is made only to maximize profit and/or minimize wait time for riders, requests of a certain type (e.g. from a non-popular pickup location, or to a non-popular drop-off location) might never be assigned to a driver. Such a system can be highly unfair to riders. However, increasing fairness might come at a cost of the overall profit made by the rideshare platform. To balance these conflicting goals, we present a flexible, non-adaptive algorithm, \lpalg, that allows the platform designer to control the profit and fairness of the system via parameters $\alpha$ and $\beta$ respectively. We model the matching problem as an online bipartite matching where the set of drivers is offline and requests arrive online. Upon the arrival of a request, we use \lpalg to assign it to a driver (the driver might then choose to accept or reject it) or reject the request. We formalize the measures of profit and fairness in our setting and show that by using \lpalg, the competitive ratios for profit and fairness measures would be no worse than $\alpha/e$ and $\beta/e$ respectively. Extensive experimental results on both real-world and synthetic datasets confirm the validity of our theoretical lower bounds. Additionally, they show that $\lpalg$ under some choice of $(\alpha, \beta)$ can beat two natural heuristics, Greedy and Uniform, on \emph{both} fairness and profit.
Optimal Scheduling of Electrolyzer in Power Market with Dynamic Prices
Luo, Yusheng, Xian, Min, Mohanpurkar, Manish, Bhattarai, Bishnu P., Medam, Anudeep, Kadavil, Rahul, Hovsapian, Rob
Optimal scheduling of hydrogen production in dynamic pricing power market can maximize the profit of hydrogen producer; however, it highly depends on the accurate forecast of hydrogen consumption. In this paper, we propose a deep leaning based forecasting approach for predicting hydrogen consumption of fuel cell vehicles in future taxi industry. The cost of hydrogen production is minimized by utilizing the proposed forecasting tool to reduce the hydrogen produced during high cost on-peak hours and guide hydrogen producer to store sufficient hydrogen during low cost off-peak hours.
How a Smart City can Manage In-bus Congestion with a 4K Video
Traffic congestion increases the time required to commute. We all know this too well here in the bay area, like any urban citizens across the world. It inflicts increased operational costs on the urban transport system. Many forecasts suggest that this will only get worse in the years to come. This rise in congestion has pushed governing authorities to promote the usage of public transport vehicles instead of private ones.
Optimal Electric Vehicle Charging Station Placement
Xiong, Yanhai (Nanyang Technological University) | Gan, Jiarui (University of Chinese Academy of Sciences) | An, Bo (Nanyang Technological University) | Miao, Chunyan (Nanyang Technological University) | Bazzan, Ana L. C. (Universidade Federal do Rio Grande do Sul)
Many countries like Singapore are planning to introduce Electric Vehicles (EVs) to replace traditional vehicles to reduce air pollution and improve energy efficiency. The rapid development of EVs calls for efficient deployment of charging stations both for the convenience of EVs and maintaining the efficiency of the road network. Unfortunately, existing work makes unrealistic assumption on EV drivers' charging behaviors and focus on the limited mobility of EVs. This paper studies the Charging Station PLacement (CSPL) problem, and takes into consideration 1) EV drivers' strategic behaviors to minimize their charging cost, and 2) the mutual impact of EV drivers' strategies on the traffic conditions of the road network and service quality of charging stations. We first formulate the CSPL problem as a bilevel optimization problem, which is subsequently converted to a single-level optimization problem by exploiting structures of the EV charging game played by EV drivers. Properties of CSPL problem are analyzed and an algorithm called OCEAN is proposed to compute the optimal allocation of charging stations. We further propose a heuristic algorithm OCEAN-C to speed up OCEAN. Experimental results show that the proposed algorithms significantly outperform baseline methods.