摘要:
An epoxy resin composition of the following chemical structure (I), where n is a number from 1 to about 3000; each m independently has a value of 0 or 1; each R0 is independently —H or —CH3; each R1 is independently —H or a C1 to C6 alkylene radical (saturated divalent aliphatic hydrocarbon radical), Ar is a divalent aryl group or heteroarylene group; and X is a cycloalkylene group, including a substituted cycloalkylene group, where the substituent group include an alkyl, cycloalkyl, an aryl or an aralkyl group or other substituent group, for example, a halogen, a nitro, or a blocked isocyanate, an alkyloxy group; the combination of cycloalkylene and alkylene groups and the combination of alkylene and cycloalkylene group with a bridging moiety in between.
摘要:
A coating composition comprising an advanced epoxy resin polymeric composition having the following chemical structure:(formula) I where n is a number from 1 to about 3000; each m independently has a value of 0 or 1; each R0 is independently —H or —CH3; each R1 is independently —H or a C1 to C6 alkylene radical (saturated divalent aliphatic hydrocarbon radical); R′1-R′4 are independently hydrogen, an alkyl, cycloalkyl, an aryl or an aralkyl group or other substituent, for example, a nitro, an isocyanate, or an alkyloxy group; additionally, any two of R′1-R′4 may form fused ring independently; and X is cycloalkylene group, including substituted cycloalkylene group, where the substituent groups include an alkyl, cycloalkyl, an aryl or an aralkyl group or other substituent group, for example, a halide, a cyano, a nitro, a blocked isocyanate, or an alkyloxy group; the combination of cycloalkylene and alkylene groups and the combination of alkylene and cycloalkylene group with a bridging moiety in between.
摘要:
A poly epoxy ester resin composition of the following chemical structure: where n is a number from 2 to about 3000; each m independently has a value of 0 or 1; each R0 is independently —H or —CH3; each R1 is independently —H or a C1 to C6 alkylene radical (saturated divalent aliphatic hydrocarbon radical), Ar is a divalent aryl group or heteroarylene group;_and X is cycloalkylene group, including substituted cycloalkylene group, where the substitute group include an alkyl, cycloalkyl, an aryl or an aralkyl group or other substitute group, for example, a halogen, a nitro, a blocked isocyanate, or an alkyloxy group; the combination of cycloalkylene and alkylene groups and the combination of alkylene and cycloalkylene group with a bridging moiety in between.
摘要:
A coating composition comprising an advanced poly epoxy ester resin polymeric composition having the following chemical structure: where n is a number from 1 to about 3000; each m independently has a value of 0 or 1; each R0 is independently —H or —CH3; each R1 is independently —H or a C1 to C6 alkylene radical (saturated divalent aliphatic hydrocarbon radical); Ar is a divalent aromatic fused-ring moiety, which is most preferably a divalent naphthalene group, substituted divalent naphthalene group, where the substitute groups include an alkyl, cycloalkyl, an aryl or an aralkyl group or other substituent; and X is cycloalkylene group, including substituted cycloalkylene group, where the substitute group include an alkyl, cycloalkyl, an aryl or an aralkyl group or other substitute group, for example, a halogen, a nitro, a blocked isocyanate, or an alkyloxy group; the combination of cycloalkylene and alkylene groups and the combination of alkylene and cycloalkylene group with a bridging moiety in between.
摘要:
A coating composition comprising an advanced epoxy resin polymeric composition having the following chemical structure:(formula) I where n is a number from 1 to about 3000; each m independently has a value of 0 or 1; each R0 is independently —H or —CH3; each R1 is independently —H or a C1 to C6 alkylene radical (saturated divalent aliphatic hydrocarbon radical); R′1—R′4 are independently hydrogen, an alkyl, cycloalkyl, an aryl or an aralkyl group or other substituent, for example, a nitro, an isocyanate, or an alkyloxy group; additionally, any two of R′1-R′4 may form fused ring independently; and X is cycloalkylene group, including substituted cycloalkylene group, where the substituent groups include an alkyl, cycloalkyl, an aryl or an aralkyl group or other substituent group, for example, a halide, a cyano, a nitro, a blocked isocyanate, or an alkyloxy group; the combination of cycloalkylene and alkylene groups and the combination of alkylene and cycloalkylene group with a bridging moiety in between.
摘要:
In many applications such as automobiles on busy highways, if a lot of vehicles on road are equipped with Doppler radars to help improve driving safety, no matter human-driven or auto-driven, if the radars use same frequency band, avoiding interference between them is a hard task. Assigning distinct frequencies is one of the solutions, however not only it wastes expensive spectrum resource, but also the task itself to dynamically assign frequency to vehicles randomly come together becomes a hard one to do. The disclosed invention of Doppler group radar will allow radar devices to work together using shared frequency band without interfering one another, without sacrificing performance, and without much increase in costs.
摘要:
In many applications such as automobiles on busy highways, if a lot of vehicles on road are equipped with Doppler LIDARs to help improve driving safety, no matter human-driven or autonomous-driven, when multiple LIDARs are simultaneously illuminating an object, the LIDARs signals will interfere with each other. Avoiding interference between them is a hard task. The disclosed invention of “Doppler group LIDAR” will allow LIDAR devices of this kind to inherently work together in “physical layer” without interfering one another, without sacrificing performance, and without having to rely on higher layer protocols to achieve these goals, so that all LIDARs of this kind interoperate easily and reliably.
摘要:
A mixed reality system and method for determining spatial positions of dental instruments without having a fixed intra oral reference point is disclosed. An intra-oral image sensor-based positioning device including at least two cameras is provided to sense and track the movements of dental instruments being used. The three-dimensional coordinates relating to the movement and orientation of the dental instruments are obtained for real time or delayed use in a mixed reality environment.
摘要:
For people with reduced physical ability such as elderly people, risks of bodily injuries are high. Once an injury occurs, a victim suffers, sometimes a victim even may not survive. To help such people, a personal wearable device without adding much inconvenience in normal life is disclosed. This personal wearable device is able to detect dangerous conditions and automatically deploy airbags when needed to prevent or mitigate potential bodily injuries.
摘要:
The present invention discloses a full-polarization-state power distributor with integer ratio of power distribution based on photonic crystal waveguide which comprises a photonic crystal waveguide formed in a photonic crystal with a complete photonic band-gap, and the photonic crystal consists of background dielectric rod array; the photonic crystal waveguide consists of a transverse waveguide and a perpendicular waveguide perpendicularly connected with the transverse waveguide; one end of the transverse waveguide is an input end, and the other end is an output end; the perpendicular waveguide is another output end; and the middle part of the transverse waveguide is provided with waveguide defect dielectric rods. The structure of the present invention has a small volume, high light transmission efficiency, it is convenient for optical integration and highly efficient and it is suitable for large-scale optical integrated circuits and can realize the function of full-polarization-state power distribution with integer ratio for different wavelengths.