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Chunming
Chunming Wang, Tewksbury, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20090201779 | Novel reading inhibit agents - Disclosed is an optical disk, card or media which comprises: a) a plurality of data structures that are readable by the interrogating beam of light; and b) a composition on or in the optical disk, card or media disposed so that when the optical disk, card or media is used in the optical read-out system, the interrogating beam of light passes through the composition before or after contacting some or all of the data structures. The composition comprises a polymeric matrix with an organometallic complex dissolved therein or with metal, transition metal, metal oxide or transition metal oxide nanoparticles uniformly dispersed therein. The composition is substantially transparent to the interrogating beam and/or is substantially colorless. Alternatively, the composition comprises a solid polymeric matrix with an olefinic compound dissolved or uniformly dispersed therein wherein double bond in the olefinic compound undergoes oxidative cleavage promoted by a transition metal catalyst and a thiophenol or a catalytic amount of a thiyl radical and wherein the composition is substantially transparent to the interrogating beam and/or is substantially colorless. | 08-13-2009 |
Chunming Wu US
| Patent application number | Description | Published |
|---|---|---|
| 20100305330 | Process for preparing 2-alkyl-3-halo-6-nitrilpyridine and its carboxylic acid and ester derivatives - A process for preparing 2-alkyl-3-halo-6-nitrilpyridine and its carboxylic acid and ester derivatives by reacting 2-alkyl-3-halo-pyridine N-oxide with dimethyl sulfate, followed by reacting the adduct with alkaline cyanide to obtain the target molecule is disclosed. Further treatment of the nitrile with base to obtain the corresponding acid, and esterification are described as well. The process was scaled up to multi-kilogram level that provided satisfactory output. | 12-02-2010 |
Chunming Xu, Changping CN
| Patent application number | Description | Published |
|---|---|---|
| 20090101543 | Catalyst composition for treating heavy feedstocks - The present invention provides a catalyst and a process for its preparation and its use in cracking heavy feedstocks. The catalyst comprises one or more zeolites having a controlled silica to alumina ratio and preferably treated with alkali in the presence of a matrix component selected from the group consisting of clays, synthetic matrix other than pillared clay, and mixtures thereof. The catalyst are particularly useful in treating heavy feedstock such as residues from oil sands processing. | 04-23-2009 |
Chunming Zhao, Chandler, AZ US
| Patent application number | Description | Published |
|---|---|---|
| 20100097923 | Peak-to-Average Reduction of SC-FDMA Signals with Frequency Mask - A wireless transmitter exhibits improved power de-rating reduction, which improves the power efficiency of non-constant envelop communication systems by mapping N first samples of a first discrete Fourier transform (DFT) of a group of coded symbols to M sub-carriers according to a first sub-carrier mapping rule ( | 04-22-2010 |
| 20100113105 | TRANSMIT POWER MEASUREMENT AND CONTROL METHODS AND APPARATUS - Embodiments include methods and apparatus for performing transmit power control. A gain application element receives a sequence of digital input samples and a digital gain signal, and combines the digital gain signal with the digital input samples to generate a sequence of gain-compensated digital samples. A power amplifier receives and amplifies an analog version of the gain-compensated digital samples in order to generate an antenna output signal. A feedback path generates an analog feedback signal from the antenna output signal, produces a sequence of digital feedback samples from the analog feedback signal, and generates difference values based on the digital feedback samples. When a specified type of constant modulus symbol is represented in the antenna output symbol, the feedback path accumulates the difference values into an accumulated error value, and produces the digital gain signal from the accumulated error value. | 05-06-2010 |