Abstract: The present invention relates to a vinyl chloride polymer and a production method thereof. More specifically, the present invention provides a vinyl chloride polymer having a polydispersity index of 2.0 to 2.3 and a porosity of 60% or greater and a production method thereof in which a vinyl chloride polymerization seed having a conversion rate of 5-20% is first prepared through preliminary polymerization and then a vinyl chloride monomer is introduced into the vinyl chloride polymerization seed to polymerize (main polymerization) a vinyl chloride polymer.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, which includes inducing the nucleation of particles by adding a mercaptan-based chain transfer agent to a monomer composition including a vinyl chloride-based monomer and a preliminary polymerization initiator (preliminary polymerization); and preparing a polymer by mixing a vinyl chloride-based monomer and the particle nuclei and adding a main polymerization initiator (main polymerization). In the preparation method, a vinyl chloride-based polymer having a uniform molecular weight distribution and a desired number average molecular weight may be provided by controlling a degree of polymerization of a vinyl chloride-based polymer prepared in such a way that dispersibility is ensured by adjusting the point of time to add the mercaptan-based chain transfer agent to the point of time to reach a specific conversion rate of the preliminary polymerization.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer composite, which comprises dispersing a vinyl chloride-based monomer in water (Step 1); polymerizing the dispersed vinyl chloride-based monomer with an initiator to prepare a polymer slurry by (Step 2); and adding a phosphite to the polymer while drying the polymer slurry, to prepare a vinyl chloride-based polymer composite (Step 3), and a vinyl chloride-based polymer composite prepared by the method and a vinyl chloride-based polymer composite composition.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, which comprises bulk-polymerizing a vinyl chloride-based monomer in the presence of an initiator (Step 1); and preparing a vinyl chloride-based polymer after the bulk polymerization (Step 2), wherein a phosphite is added in the step 1, a vinyl chloride-based polymer, and a vinyl chloride-based polymer composition comprising the vinyl chloride-based polymer.

Abstract: Technical solutions are described for tuning a building control system, such as a variable air volume system, which includes intervened control loops. In one aspect, a method includes receiving a performance objective of the system. The method also includes generating a collection of values for parameters of the control loops based on stored information that includes a stored velocity and a stored position. The method also includes evaluating the collection of values for the parameters by comparing a performance measure and the performance objective of the system. In response to a difference between the performance objective and the performance measure satisfying a predetermined threshold the collection of values are stored and the control loops are configured according to the stored information for the parameters. The present document further describes examples of other aspects such as systems, computer products.

Abstract: The present invention relates to a vinyl chloride-based copolymer which has good processability and thus is capable of providing molded articles having good appearance characteristics, for example, transparency, a method for preparing the same, a thermoplastic resin composition containing the same, and a thermoplastic resin molded article produced from the thermoplastic resin composition. The vinyl chloride-based copolymer includes N-vinyllactam-based polymer compound derived units and unsaturated fatty acid ester derived units at an appropriate ratio, and may have improved structure stability and good processability due to the N-vinyllactam-based polymer compound derived units and improved plasticity and processability due to the internal plasticizer action of the unsaturated fatty acid ester derived units. Therefore, the vinyl chloride-based copolymer according to the present invention may be easily applied in industries that need thereof.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, which may prepare a vinyl chloride-based polymer with excellent surface properties by adjusting a foam level generated during a polymerization reaction to an appropriate value, a vinyl chloride-based polymer prepared thereby, and an apparatus for preparing a vinyl chloride-based polymer which may prepare the vinyl chloride-based polymer. The method of preparing a vinyl chloride-based polymer according to the present invention may prepare a vinyl chloride-based polymer with excellent surface properties, for example, fewer occurrences of fish-eyes and excellent transparency, by performing a polymerization reaction while maintaining the level of a foam generated during the polymerization reaction at an appropriate value.

Abstract: Disclosed are a chloroethylene-based nanocomposite composition comprising a chloroethylene-based resin; a nanoclay comprising a coupling agent bonded thereto; and at least one polymer selected from unsaturated organic acid-based resins or polycarboxylic acid-based resins, and a method of preparing the same.

Abstract: The present invention relates to a vinyl chloride-based polymer containing an unsaturated fatty acid ester at a specific ratio, a method for preparing the same, a thermoplastic resin composition containing the same, and a thermoplastic resin molded article produced from the composition. The vinyl chloride-based polymer may have good processability, and thus, the thermoplastic resin molded article produced from the thermoplastic resin composition containing the vinyl chloride-based polymer may have high impact strength and improved appearance characteristics.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based copolymer having excellent plasticity and processability, a vinyl chloride-based copolymer prepared thereby, a thermoplastic resin composition including the vinyl chloride-based copolymer, and a thermoplastic resin molded article prepared from the composition. Since the preparation method may improve copolymerizability with a vinyl chloride-based monomer by continuously adding or dividedly adding an unsaturated fatty acid ester mixture used as a comonomer during the time of specific polymerization conversion rate, the unreacted unsaturated fatty acid ester mixture may be reduced, and, as a result, the conversion rate of the vinyl chloride-based copolymer may be significantly improved. Thus, plasticity and processability of a vinyl chloride-based copolymer prepared by the above method may be significantly improved.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, which includes inducing the nucleation of particles by adding a mercaptan-based chain transfer agent to a monomer composition including a vinyl chloride-based monomer and a preliminary polymerization initiator (preliminary polymerization); and preparing a polymer by mixing a vinyl chloride-based monomer and the particle nuclei and adding a main polymerization initiator (main polymerization). In the preparation method, a vinyl chloride-based polymer having a uniform molecular weight distribution and a desired number average molecular weight may be provided by controlling a degree of polymerization of a vinyl chloride-based polymer prepared in such a way that dispersibility is ensured by adjusting the point of time to add the mercaptan-based chain transfer agent to the point of time to reach a specific conversion rate of the preliminary polymerization.

Abstract: The present invention relates to a method of preparing a vinyl chloride-based polymer, which may prepare a vinyl chloride-based polymer with excellent surface properties by adjusting a foam level generated during a polymerization reaction to an appropriate value, a vinyl chloride-based polymer prepared thereby, and an apparatus for preparing a vinyl chloride-based polymer which may prepare the vinyl chloride-based polymer. The method of preparing a vinyl chloride-based polymer according to the present invention may prepare a vinyl chloride-based polymer with excellent surface properties, for example, fewer occurrences of fish-eyes and excellent transparency, by performing a polymerization reaction while maintaining the level of a foam generated during the polymerization reaction at an appropriate value.

Abstract: The present invention relates to a method for preparing a vinyl chloride-based polymer, to a vinyl chloride-based polymer, and to a vinyl chloride-based polymer composition comprising same, the method comprising: a first step of bulk polymerizing a vinyl chloride-based monomer under the presence of an initiator; and a second step of obtaining a vinyl chloride-based polymer after completing the bulk polymerization, wherein a phosphite is input in the first step.

Abstract: A method for controlling a system including a plurality of subsystems, includes receiving operational data from the plurality of subsystems of the system (S21). A future condition of each of the plurality of subsystems is estimated from the received operational data (S22). A control strategy for delaying a need for system maintenance is generated based on the estimated future condition of each of the plurality of subsystems (S23). An operation of the system is controlled based on the generated control strategy (S24).

Abstract: Provided are a vinyl chloride-based copolymer, as a secondary particle in which primary particles are assembled, which may exhibit excellent mechanical properties and transparency as well as excellent plasticity by having an average pore diameter of 100 nm or less and a porosity of 40 vol % or less, including 65 wt % to 97 wt % of a vinyl chloride-based monomer-derived repeating unit; and 3 wt % to 35 wt % of cis and trans isomers of an unsaturated fatty acid ester-derived repeating units, and including the repeating units respectively derived from the cis and trans isomers of the unsaturated fatty acid ester in a weight ratio of 60:40 to 99:1, and a method of preparing the same.

Abstract: An intelligent workpiece system includes a workpiece comprising a portion of a product; and an embedded computing system attached to the workpiece. The embedded computing system is configured to communicate with machines in a manufacturing environment to facilitate assembly of the workpiece into the product at a plurality of assembling areas.

Abstract: A method of controlling energy consumption in a building includes receiving occupancy data including at least one of occupant request data and occupant schedule data, receiving weather data including at least one of current weather measurement data and weather forecast data, generating an output control signal based on the occupancy data and the weather data, and transmitting the output control signal to a building automation system (BAS) of the building. The occupant request data includes a current request, and the occupant schedule data includes a predicted occupant schedule. The output control signal adjusts a building control device in a zone in the building.

Abstract: The present invention relates to vinyl-based thermoplastic resin composition having excellent thermal stability, which comprises a metal complex agent, and a first vinyl-based monomer and a second vinyl-based monomer having different iron ion concentration from each other, a method for manufacturing thereof, and vinyl-based thermoplastic resin manufactured therefrom. The accompanying vinyl-based thermoplastic resin composition can enhance thermal stability, and the vinyl-based thermoplastic resin manufactured from the composition may have excellent thermal stability. Thus, it can be easily applied to industries requiring thereof, in particular, industries of vinyl-based thermoplastic resin and its mold processed goods.

Abstract: A distributed cyber-physical system includes physical elements (15-1, 15-2, . . . , 15-n) disposed in a physical space (11). Controllers (13-1, 13-2, . . . , 13-n) are disposed in a cyber space (10). Each of the physical elements (15-1, 15-2, . . . , 15-n) corresponds to a corresponding controller (13-1, 13-2, . . . , 13-n). A cyber infrastructure (12) is disposed in the cyber space (10). The cyber infrastructure (12) manages a connection between the controllers (13-1, 13-2, . . . , 13-n) and the physical elements (15-1, 15-2, . . . , 15-n). Control loops (14) are established via the cyber infrastructure (12). Each of the control loops (14) includes a physical element and a corresponding controller.

Abstract: A method including: computing a total cost for a first zone in a building, wherein the total cost is equal to an actual energy cost of the first zone plus a thermal discomfort cost of the first zone; and heuristically optimizing the total cost to identify temperature setpoints for a mechanical heating/cooling system and a start time and an end time of the mechanical heating/cooling system, based on external weather data and occupancy data of the first zone.