Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for secure communications in a digital engineering ecosystem. In some implementations, a digital platform receives a request from a user device to interact with a digital model. The digital platform determines whether a user operating the user device is authorized. In response to determining the user is authorized to access the digital platform, the digital platform generates a token that provides the user with access to the digital platform. The digital platform determines whether the request includes malicious activity. In response to determining that the request is absent of the malicious activity, the digital platform executes a digital thread that executes one or more operations using digital tools and the digital model. The digital platform provides data indicative of the one or more operations executing the digital thread to the user device.

Abstract: A locking system for a storage container comprises a housing mounted by a bracket within a cavity formed in at least one end wall of the container. The housing receives a padlock having a shackle movable between a locked position and an unlocked position relative to the latch arms of a latch mounted to the lid of the container, and a guard is connected to the front wall of the container and to the bracket in position to block access to at least that portion of the shackle which captures the latch arms of the latch.

Abstract: A locking system for a storage container provides a reliable and durable means of locking the lid in the closed position with a limited number of moving parts while providing resistance to tampering and theft.

Abstract: A locking system for a storage container provides a reliable and durable way of locking the lid in the closed position with a limited number of moving parts while providing resistance to tampering and theft. The locking system includes a housing which receives a padlock having a shackle movable between a locked position and an unlocked position relative to the latch arms of a latch mounted to the lid.

Abstract: A locking system for a storage container provides a reliable and durable way of locking the lid in the closed position with a limited number of moving parts while providing resistance to tampering and theft. The locking system includes a housing which receives a padlock having a shackle movable between a locked position and an unlocked position relative to the latch arms of a latch mounted to the lid.

Abstract: In some embodiments, a method of monitoring a resin-producing polymerization reaction in a fluid bed reactor system to generate reaction parameter data in on-line fashion, determining an indicator of at least one of entropy and complexity (for example, Kolmogorov or Shannon entropy) of each of at least two subsets of the reaction parameter data, and optionally also determining from at least one value of the indicator (for example, from a time series of Kolmogorov or Shannon entropy values) an indication of at least one of degree of resin stickiness, an approach to or imminence of resin stickiness, and an approach to or imminence of an unsafe or undesired reactor operating condition (e.g., that can result in sheeting or chunking). Optionally also, the reaction is controlled in response to at least one value of the indicator, for example, in an effort to prevent the occurrence of sheeting or another discontinuity event or to maintain the reactor in a stable, non-sticking condition.

Abstract: The present invention describes a method for determining reactor continuity of a polymerization reactor by non-linear dynamics. Specifically, the invention relates to a method of analyzing system variables to indicate gas phase reactor continuity in real-time and controlling the reactor continuity to maintain operability.

Abstract: Disclosed is a method of making polyethylene wherein ethylene, a catalyst, a cocatalyst and a solvent are added to a reactor. A first mixture is formed of the ethylene and either the catalyst or the cocatalyst and a second mixture is separately formed of the solvent and the other of the catalyst or cocatalyst. These two mixtures are then combined in a reactor to produce the polyethylene.