Abstract: Online ride-hailing and invoice issuing methods, systems and apparatuses are provided. An example method comprises: receiving a first ride-hailing request from a user terminal, wherein the first ride-hailing request includes one or more transport capacity types, one or more online ride-hailing service providers providing the corresponding one or more transport capacity types, a start location and a destination location; sending one or more second ride-hailing requests to one or more online ride-hailing service platforms corresponding to the one or more online ride-hailing service providers according to the one or more transport capacity types and the one or more online ride-hailing service providers; receiving one or more second ride-hailing response messages returned by one or more of the one or more online ride-hailing service platforms; and returning a first ride-hailing message to the user terminal based on the second one or more ride-hailing response messages.

Abstract: A hydraulic door closer including an elongated housing, a connection rod extending into the housing, a piston secured at an inner end of the connection rod within the housing and a spring positioned within the housing about the connection rod. A throttle valve and a check valve are formed in the piston and define a throttle-valve fluid passage and a check-valve fluid passage, respectively. Both fluid passages are configured to be open for passing a fluid through the valves and closed to stop the fluid flow. The check-valve fluid passage is larger than the throttle-valve fluid passage and is closed during door closing for restricted fluid flow slowing the door motion. A stopping/holding mechanism includes a piston groove, a rod groove and a positioning pin disposed between the piston and the connection rod. The piston groove is defined by the piston for retaining the entire positioning pin during door opening/closing motion.

Abstract: The present invention provides a method for recombinant production, recovery and purification of endostatin protein. This method may be employed for large scale recovery and purification of recombinantly-produced endostatin protein.

Abstract: The present invention provides a method for recombinant production, recovery and purification of angiostatin protein. This method may be employed for large scale recovery and purification of recombinantly-produced angiostatin protein.

Abstract: The present invention provides a method for recombinant production, recovery and purification of angiostatin protein. This method may be employed for large scale recovery and purification of recombinantly-produced angiostatin protein.

Abstract: Polymer polyols and polymer-modified polyols having substantially no transition metal content in the polyol continuous phase may be prepared from encapsulative double metal cyanide complex-catalyzed polyoxyalkylene polyether base polyols without substantial removal of double metal cyanide complex catalyst residues from the base polyol and subsequent in situ polymerization of one or more polymerizable monomers.

Abstract: Polymer polyols and polymer-modified polyols having substantially no transition metal content in the polyol continuous phase may be prepared from encapsulative double metal cyanide complex-catalyzed polyoxy-alkylene polyether base polyols without substantial removal of double metal cyanide complex catalyst residues from the base polyol and subsequent in situ polymerization of one or more polymerizable monomers.

Abstract: Polymer polyols and polymer-modified polyols having substantially no transition metal content in the polyol continuous phase may be prepared from encapsulative double metal cyanide complex-catalyzed polyoxyalkylene polyether base polyols without substantial removal of double metal cyanide complex catalyst residues from the base polyol and subsequent in situ polymerization of one or more polymerizable monomers.

Abstract: Polymer polyols prepared by a semi-batch process using a small amount of a seed polymer polyol are disclosed. The final polymer polyol has a broader particle size distribution as compared to an identically prepared polymer polyol prepared in the absence of the seed polymer polyol. The polymer polyols are suitable for use in producing polyurethanes, particularly polyurethane foams.