摘要:
Electrically conductive oxides of the pyrochlore family based on copper and/or silver, lead, bismuth, and ruthenium, characterized by the formula M.sub.x M'.sub.y (Pb,Bi).sub.2-x-y Ru.sub.2 O.sub.7-z, wherein M=copper and/or silver, M'=calcium, strontium, and/or barium, 0.ltoreq.x.ltoreq.0.6, 0.1.ltoreq.y.ltoreq.1.0, and 0.1.ltoreq.z.ltoreq.1.0.
摘要:
A process for the resolution of optical isomers of racemic lithium pantoate by selective crystallization from a solution in methanol, ethanol, or other polar solvents, or by electrostatic separation. The optical isomers can be readily converted to optically active pantolactones which are the starting material for the preparation of optically active pantothenic acid and its salt and pantothenyl alcohol. One of the two optical isomers of each of these compounds possesses vitamin activity. The unwanted or inactive optical isomer of lithium pantoate as such is thermally stable and can be racemized by heating in the presence of a basic reacting compound at a temperature between 120 and 180.degree. C to produce a racemic mixture which can then be subjected directly to resolution without conversion to some other derivative in accordance with the processes of the present invention to produce the desired or active optical isomer.
摘要:
A process for the resolution of optical isomers of racemic lithium pantoate by selective crystallization from a solution in methanol, ethanol, or other polar solvents, or by electrostatic separation. The optical isomers can be readily converted to optically active pantolactones which are the starting material for the preparation of optically active pantothenic acid and its salt and pantothenyl alcohol. One of the two optical isomers of each of these compounds possesses vitamin activity. The unwanted or inactive optical isomer of lithium pantoate as such is thermally stable and can be racemized by heating in the presence of a basic reacting compound at a temperature between 120.degree. and 180.degree. C to produce a racemic mixture which can then be subjected directly to resolution without conversion to some other derivative in accordance with the processes of the present invention to produce the desired or active optical isomer.
摘要:
The invention relates to a guide device for a drilling device, comprising a housing having deflection means for generating a side force, and a shaft rotatably supported within the housing, wherein the shaft comprises connection means at a first end for connecting to a drilling rod, and connection means at a second end for connecting to a drilling head, and wherein coupling means are provided for connecting the shaft to the housing in a rotationally fixed manner as needed.
摘要:
A method and also a control and data-transmission system is presented, with which the installation location of at least one safety bus component connected to the control and data-transmission system (10) can be checked.For this purpose, in two separate communications cycles, a respective position identifier, which had been allocated to the safety bus components (60) in a prior configuration process, is transmitted to each safety bus component via a non-safety communications control device (30). The safety bus components compare the position identifiers received in the two communications cycles to the contents of a memory, in which a reference position identifier has already been stored or which is still empty. Based on a comparison of the transmitted position identifier to the reference position identifier and the configuration dataset stored in a safety control device (50), it can be tested whether each safety bus component is connected to the predetermined installation location within the control and data-transmission system (10).
摘要:
A test stand arrangement comprises an electric machine (4) for driving and/or loading a test object (1) which is connected by means of a connecting shaft (2) having an adapter flange (3) to the electric machine (4).To be able to establish the connection of the drivetrain and vehicle simulation with the real vehicle-specific combustion and transient behavior of the engine, the arrangement consisting of connecting shaft (2) and drive and load machine (4) has a constant, predetermined moment of inertia, and the mass and the moment of inertia of the adapter flange (3) are selected in such a manner that the resonant frequency of the system consisting of test object (1), adapter flange (3), connecting flange (2), and electric machine (4) for driving and/or loading the test object (1) lies between the idle frequency and the partial load frequency of the test object (1).
摘要:
A schema-oriented content management system, in particular to an apparatus and a method for storing and accessing data in a content management system which allows content schema evolution while maintaining operation based on already stored content data. A data processing apparatus for storing and accessing data in a content management system comprises a content object generation arrangement for generating content objects to store content data, wherein a content object comprises a plurality of property-value bindings, a content object storing arrangement for storing generated content objects, a content schema generation arrangement for generating an object-oriented content schema to model content data, a content schema storing arrangement for storing the generated content schema, and a content object accessing arrangement to access stored content objects by way of the stored content schema.
摘要:
A method for implementing biomechanical stimulation training includes application of a preselected dynamic force concurrent with a local proprioceptive stimulus at an engagement member and performing at least one dynamic training activity. The method also includes applying a preselected isometric training force concurrent with another local proprioceptive stimulus at the engagement member, and performing an isometric training activity. An apparatus to facilitate performance of dynamic and isometric training activities includes an engagement member structured to facilitate operative engagement with a portion of a person's body, a force generation assembly structured to generate dynamic and isometric training forces at the engagement member, and a vibration generation assembly structured to generate local proprioceptive stimuli at the engagement member.
摘要:
The invention relates to a method and to an apparatus, which has been adapted to carry out the method, for the coupling of a safety-critical process from a safe environment, which has at least two redundant processing channels, to an environment which is not safe or to an environment which is safe but has fewer processing channels. To this end, provision is made of a method which processes a data record which is relevant to the safety-critical process, in particular on a protocol-specific basis, to form a respective safe protocol (14, 24) using at least two redundant processing channels (1, 2) in accordance with identical laws, and forms a common safe protocol taking into account at least two redundant safe coupling protocols (14, 24), to be precise by accessing a common (buffer) register (30) using each of the processing channels (1, 2), in which case a write authorization is allocated only once for each register location, and, when writing at least elements (14′) of the common safety-based protocol using a processing channel (1) with write authorization, at least one further processing channel (2) is first of all used to check (25) whether these elements (14′) are identical to one another, and access to the common buffer register for the purpose of storing these elements is enabled only when they are identical to one another.
摘要:
In a connection between an inner casing tube of a steering column of a motor vehicle and a sleeve-shaped holder, an adjusting device for the casing tube is fastened and engages around the casing tube in an encircling manner and is fixed thereon in a form-fitting manner. In order to hold the holder on the casing tube in a secure and positionally correct manner counter to high axial forces and torques using the simplest arrangement possible, the casing tube has at least two axially spaced apart, radially protruding stops against which, on a mutually facing side, the holder bears with a respective stop edge, and the casing tube has at least one form-fitting element which interacts in a latching manner in the circumferential direction with a mating form-fitting element arranged on the holder.