摘要:
Heterobifunctional polymeric prodrug platforms for delivering biologically active compounds, including proteins, monoclonal antibodies and the like are disclosed. One preferred compound is Methods of making and using the compounds and conjugates described herein are also provided.
摘要:
A four arm-polyethylene glycol-7-ethyl-10-hydroxycamptothecin conjugate, such as, is disclosed. Methods of making the conjugates and methods of treating mammals using the same are also disclosed.
摘要:
A new method of preparing a tertiary alkyl ester of a polyalkylene oxide is provided. The new method employs milder conditions that avoid the back reaction to the starting polyalkylene oxide. The tertiary alkyl ester of a polyalkylene oxide is then reacted with a suitable acid to produce a polyalkylene oxide acid.
摘要:
Disclosed is an improved approach for performing crosstalk and signal integrity analysis in which multiple variables are taken into account when analyzing the effects of on-chip crosstalk, such as for example coupled wire length, ration of coupling capacitance, and aggressor and victim driver types. Rather than performing a full-chip simulation, the potential crosstalk effects can be pre-characterized by performing simulation/modeling over specific net portions by systematically changing the values of these multiple variables. A set of patterns characterized from the variables are formed from the modeling. During the analysis process, the IC design is checked of the presence of the patterns, from which is produced the expected delay impact for crosstalk in the design.
摘要:
A system, method, and computer program accurately models circuit parameter variation for delay calculation. For any given circuit parameter value, a cell is characterized at just three values in the circuit parameter range. An interpolation process generates an equation to calculate delay using the characterization data from the three circuit parameter values. This delay equation calculates the delay for any value in the circuit parameter range. Similar methodology is used to model simultaneous variation of two circuit parameters. The cell is characterized at just six circuit parameter pairs to interpolate the delay equation for any circuit parameter pair in the characterized ranges. This methodology can be extended to accommodate variation of multiple circuit parameters using similar interpolation techniques.
摘要:
A method for improving the sound quality of voice signals transmitted during a call between two digital wireless telephones by diverting the call from a circuit switched network to a data network is disclosed. In accordance with the present invention, a call setup procedure using the circuit switched network is modified so that the calling party may determine the following information: 1) whether the called party's digital wireless telephone is able to support one of the voice compression algorithms supported by the calling party's digital wireless telephone and 2) whether both wireless telephones have access to the same data network. If the called party's digital wireless telephone is able to support one of the voice compression algorithms supported by the calling party's digital wireless telephone and both wireless telephones have access to the same data network, the circuit switched network call setup procedure is abandoned before the called party answers the call and the call is completed using the data network. Completing the call by encoding voice signals using a common voice compression algorithm executed by the digital wireless telephones and by sending the encoded voice signals through a data network eliminates the drawbacks associated with the additional intermediate encoding which would have been required if the call had been completed using the circuit switched network.
摘要:
The invention is directed primarily to compounds of Formula I: wherein: R1 is a polymeric residue; L1 is a bifunctional linking group; Y1 and Y2 are independently O, S or NR7; R2-7 are independently selected from the group consisting of hydrogen, C1-6 alkyls, C3-12 branched alkyls, C3-8 cycloalkyls, C1-6 substituted alkyls, C3-8 substituted cycloalkyls, aryls, substituted aryls, aralkyls, C1-6 heteroalkyls, substituted C1-6 heteroalkyls, C1-6 alkoxy, phenoxy and C1-6 heteroalkoxy; D is a moiety that is a leaving group or a residue of a compound to be delivered into a cell; Z is selected from the group consisting of: a moiety that is actively transported into a target cell, a hydrophobic moiety, and combinations thereof; Ar is a moiety which when included in Formula (I) forms a multi-substituted aromatic hydrocarbon or a multi-substituted heterocyclic group; and (y) is a positive integer greater than or equal to 1. Methods of making and using the same are also disclosed.
摘要翻译:本发明主要针对式I化合物:其中:R1是无规残基; L1是双官能连接基团; Y 1和Y 2独立地是O,S或NR 7; R 2-7独立地选自氢,C1 C6烷基,C3-12支链烷基,C3-8环烷基,C1-6取代烷基,C3-8取代环烷基,芳基,取代芳基,芳烷基,C1-6杂烷基,取代C1-6杂烷基,C1-6烷氧基, 苯氧基和C 1-6杂烷氧基; D是作为离开基团或待递送至细胞中的化合物的残基的部分; Z选自:主动转运入靶细胞的部分, 疏水部分及其组合; Ar是当式(I)中包含时形成多取代芳族烃或多取代杂环基的部分; 和(y)是大于或等于1的正整数。还公开了制造和使用它们的方法。
摘要:
A non-linear dynamic predictive device (60) is disclosed which operates either in a configuration mode or in one of three runtime modes: prediction mode, horizon mode, or reverse horizon mode. An external device controller (50) sets the mode and determines the data source and the frequency of data. In prediction mode, the input data are such as might be received from a distributed control system (DCS) (10) as found in a manufacturing process; the device controller ensures that a contiguous stream of data from the DCS is provided to the predictive device at a synchronous discrete base sample time. In prediction mode, the device controller operates the predictive device once per base sample time and receives the output from the predictive device through path (14). In horizon mode and reverse horizon mode, the device controller operates the predictive device additionally many times during base sample time interval. In horizon mode, additional data is provided through path (52). In reverse horizon mode data is passed in a reverse direction through the device, utilizing information stored during horizon mode, and returned to the device controller through path (66). In the forward modes, the data are passed to a series of preprocessing units (20) which convert each input variable (18) from engineering units to normalized units. Each preprocessing unit feeds a delay unit (22) that time-aligns the input to take into account dead time effects such as pipeline transport delay. The output of each delay unit is passed to a dynamic filter unit (24). Each dynamic filter unit internally utilizes one or more feedback paths that are essential for representing the dynamic information in the process. The filter units themselves are configured into loosely coupled subfilters which are automatically set up during the configuration mode and allow the capability of practical operator override of the automatic configuration settings. The outputs (28) of the dynamic filter units are passed to a non-linear analyzer (26) which outputs a value in normalized units. The output of the analyzer is passed to a post-processing unit (32) that converts the output to engineering units. This output represents a prediction of the output of the modeled process. In reverse horizon mode, a value of 1 is presented at the output of the predictive device and data is passed through the device in a reverse flow to produce a set of outputs (64) at the input of the predictive device. These are returned to the device controller through path (66). The purpose of the reverse horizon mode is to provide essential information for process control and optimization. The precise operation of the predictive device is configured by a set of parameters. that are determined during the configuration mode and stored in a storage device (30). The configuration mode makes use of one or more files of training data (48) collected from the DCS during standard operation of the process, or through structured plant testing. The predictive device is trained in four phases (40, 42, 44, and 46) corresponding respectively to components 20/32, 22, 24 and 26. The importance of this predictive device is that it is shown to approximate a large class of non-linear dynamic processes. The structure of the predictive device allows it to be incorporated into a practical multivariable non-linear Model Predictive Control scheme, or used to estimate process properties.
摘要:
A method of carrier recovery in a wireless communications system using a known synchronization word, for example an IS-54 TDMA system, operates in two stages to produce an estimate of carrier phase. In the first stage, a complex fading factor, embodying carrier phase information, is estimated from the synchronization word in the received signal using a least square criterion. In the second stage, the carrier phase is estimated from this complex fading factor by averaging. The averaging can provide a recursive average or a moving average, or can be implemented using Kalman filtering which also provides an estimated amplitude factor and frequency shift. The method and apparatus provide a substantial improvement over phase locked loop carrier recovery.
摘要:
The present invention is directed compositions of the formula: ##STR1## wherein: D is a residue of biologically active moiety;X is an electron withdrawing group;Y and Y' are independently O or S;(n) is zero (0) or a positive integer, preferably from 1 to about 12;wherein: R.sub.1 and R.sub.2 are independently selected from the group consisting of H, C.sub.1-6 alkyls, aryls, substituted aryls, aralkyls, heteroalkyls, substituted heteroalkyls and substituted C.sub.1-6 alkyls;wherein: R.sub.3 is a substantially non-antigenic polymer, C.sub.1-12 straight or branched alkyl or substituted allyl, C.sub.5-8 cycloalkyl or substituted cycloalkyl, carboxyalkyl, carboalkoxy alkyl, dialkylaminoalkyl, phenylalkyl, phenylaryl or ##STR2## wherein: R.sub.4 and R.sub.5 are independently selected from the group consisting of H, C.sub.1-6 alkyls, aryls, substituted aryls, aralkyls, heteroalkyls, substituted heteroalkyls, and substituted C.sub.1-6 alkyls or jointly form a cyclic C.sub.5 -C.sub.7 ring. In preferred embodiments, the prodrugs contain a polyethylene glycol having a molecular weight of at least about 20,000.