摘要:
Sulfonated polyimides that include structural units derived from a monomer of formula I are useful as proton exchange membranes for fuel cells. In the formula, X is O, S, NH or a combination thereof; Y is N, CR or a combination thereof; L1 and L2 are independently divalent perfluoroalkyl, divalent C6-C12 aryl or a direct bond; R is H or alkyl; and the L1-NH2 group is situated at the 5- or 6-position
摘要:
Sulfonated polyethersulfones and polymer compositions comprising sulfonated polyethersulfones and at least one inorganic heteropolyacid are useful as proton exchange membranes for fuel cells. The polyethersulfones include structural units derived from at least one biphenol monomer and a monomer of formula I wherein X is O, S or NR1; Y is N or CR5; R1, R2, R3 and R4 are independently hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, arylalkyl or substituted arylalkyl, or R3 and R4, taken together, form a 5- or 6-membered substituted or unsubstituted aliphatic or aromatic ring; R5 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl, arylalkyl or substituted arylalkyl; and L is a direct bond or a divalent aromatic linker containing 6-12 carbons
摘要翻译:包含磺化聚醚砜和至少一种无机杂多酸的磺化聚醚砜和聚合物组合物可用作燃料电池的质子交换膜。 聚醚砜包括衍生自至少一种联苯酚单体的结构单元和式I的单体,其中X是O,S或NR 1; Y是N或CR 5; R 1,R 2,R 3和R 4独立地是氢,烷基,取代的烷基,芳基, 取代的芳基,烷基芳基,取代的烷基芳基,芳烷基或取代的芳烷基,或R 3和R 4一起形成5-或6-元取代或未取代的脂族基或 芳香环 R 5是氢,烷基,取代的烷基,芳基,取代的芳基,烷基芳基,取代的烷基芳基,芳烷基或取代的芳基烷基; L是直接键或含有6-12个碳原子的二价芳族连接体
摘要:
An aspect of the present invention is a method for retrieving reliability data in a system. The method includes coupling a device to the system, collecting the reliability data with the device and retrieving the reliability data from the device.
摘要:
A device for distributing waste heat from a heat source evenly across an exterior surface of an enclosure is disclosed. The device includes a first layer of material that has a high thermal conductivity along a first plane. One or more layers of material that include a controlled thermal conductivity along a second plane are connected with the first layer. At least one of those layers has a low thermal conductivity (e.g. a thermal insulating material) in the second plane and that layer is positioned between the heat source and the enclosure so that heat flow through that layer is substantially inhibited in the second plane and a majority of the waste heat is thermally transferred through the first layer along the first plane to the exterior surface where the waste heat is uniformly distributed thereby reducing hot spots on the exterior surface which can cause user discomfort.
摘要:
A control system for controlling airflow through a vent. The system includes a vent assembly having a frame. The frame includes an opening to allow air to flow through the frame. The vent assembly also includes a movable damper for variably restricting the fluid flow through the opening in the vent assembly, a motor for controlling movement of the damper, and a sensor for determining the position of the damper. In addition, a controller is provided to control the motor to vary the position of the damper to thereby vary the airflow through the opening in the vent assembly.
摘要:
A lighting system adapted to mount on a motorcycle or bicycle helmet. The lighting system includes a one or more accelerometers coupled to the helmet and a processor adapted to process the signals from the accelerometers. The accelerometers may be mounted to the helmet, or the motorcycle or bicycle. The lighting system further includes a light mounted on the helmet that is responsive to the processed signal such that the light illuminates as result of a deceleration force. The system may also include filtering software to remove helmet motion artifact and other noise from the signal. Remote wheel speed indicators may also be used in conjunction with or in place of the accelerometers. Mounting tabs may also be included to releasably attach the lighting unit to the helmet.
摘要:
An intermediate queuing/de-queuing mechanism between an asynchronous server and a synchronous process or client allows the asynchronous server to communicate with the synchronous client in a performance oriented and asynchronous manner. The coexistence of two different queuing mechanisms within the same logical execution environment is thus enabled. Further, the asynchronous merging of other format updates during the recovery process is facilitated, such as change accumulation and image copy records. Operations between the synchronous process and asynchronous processes are thus expedited, embedding a synchronous process within the total asynchronous environment of the overall data processing system to enable restoration of the database.
摘要:
An inductive device (200) that includes a core (210) configured so as to be a closed loop and at least one coil (220) around the core, and methods for assembly. The coil is formed from a material having a cross-section with an aspect ratio of a first dimension to a second adjacent dimension, with the first dimension being longer than the second dimension, wherein the coil is positioned around the core such that the first dimension is essentially normal to the core. In one embodiment the core includes a removable core section to enable assembly of the inductive device by slidably placing the coil onto the core through an opening formed in the core by removing the core section. In another embodiment, the coil is rotated to cause it to wind around the core.
摘要:
An elongate probe suitable for measuring one or more properties of a stream of fluid, the probe having an external planar sensing surface, which in use is exposed to the stream of fluid, at a longitudinal end thereof and comprising a plurality of sensors at the planar external sensing surface.