Jiangsu University | Date: 2014-08-26
Provided is a laser shock peening method for obtaining a large-area uniform surface morphology. Using the relationship between the thickness of an absorption layer and a plastic deformation due to the laser shock peening and using a grid-shaped absorption layer (5) having a staggered distribution in thickness in cooperation with a two-layer interlaced laser shock processing method significantly reduce the height difference between micro-protrusions (10) and micro-pits (12) produced by an impact of a square light spot, and effectively reduce the roughness of the workpiece surface such that a large-area uniform surface morphology is formed on the workpiece surface.
Jiangsu University | Date: 2015-04-28
A microstructured optical fiber has periodically arranged high-index rods embedded in a low-index background, a high-index ring surrounding the high-index rods, and a high-index core located at the center. The high-index rods and the low-index background forms a microstructured cladding region which supports the guidance of supermodes. The fundamental and the highest supermodes form a cladding-mode band, wherein at least the effective index of a core mode lies in the cladding-mode band. Also provided is a technique for selectively filtering the fiber modes, to selectively filter out one or some of the high-order modes with the other modes still guided in the core with low loss. The cascade of optical fibers can filter out a group of fiber modes, marking guidance of a single high-order mode in a few-mode optical fiber possible.
Jiangsu University and Nanjing Fenggong Agricultural Science & Technology Co. | Date: 2014-09-02
A method for detecting the similarity of the patent documents based on a new kernel function Luke kernel comprises: dividing a patent document into five elements, i.e. patent title, abstract, claims, description, and main classification, constructing a new kernel function Luke kernel, calculating the similarity of the first four elements of two patent documents by using the Luke kernel, calculating the similarity between the main classifications of the two patent documents by means of character string matching, and then performing a weighted summation of the similarities of the five elements of the two patent documents to obtain an overall similarity of the patent documents. The method further improves the precision and recall in detecting the similarity of the patent documents, and can be applied to detection for the similarity of the patent documents.
Wang Z.,Jiangsu University
Molecular genetics and genomics : MGG | Year: 2014
Data normalization is essential for reliable output of quantitative real-time reverse-transcription polymerase chain reaction (qRT-PCR) assays, as the unsuitable choice of reference gene(s), whose expression might be influenced by exogenous treatments in plant tissues, could cause misinterpretation of results. To date, no systematic studies on reference genes have been performed in stressed Brassica napus. In this study, we investigated the expression variations of nine candidate reference genes in 40 samples of B. napus leaves subjected to various exogenous treatments. Parallel analyses by geNorm and NormFinder revealed that optimal reference genes differed across the different sets of samples. The best-ranked reference genes were PP2A and TIP41 for salt stress, TIP41 and ACT7 for heavy metal (Cr(6+)) stress, PP2A and UBC21 for drought stress, F-box and SAND for cold stress, F-box and ZNF for salicylic acid stress, TIP41, ACT7, and PP2A for methyl jasmonate stress, TIP41 and ACT7 for abscisic acid stress, and TIP41, UBC21, and PP2A for Sclerotinia sclerotiorum stress. Two newly employed reference genes, TIP41 and PP2A, showed better performances, suggesting their suitability in multiple conditions. To further validate the suitability of the reference genes, the expression patterns of BnWRKY40 and BnMKS1 were studied in parallel. This study is the first systematic analysis of reference gene selection for qRT-PCR normalization in B. napus, an agriculturally important crop, under different stress conditions. The results will contribute toward more accurate and widespread use of qRT-PCR in gene analysis of the genus Brassica.
Cao J.,Jiangsu University
PLoS ONE | Year: 2012
Pectin lyases are a group of enzymes that are thought to contribute to many biological processes, such as the degradation of pectin. However, until this study, no comprehensive study incorporating phylogeny, chromosomal location, gene duplication, gene organization, functional divergence, adaptive evolution, expression profiling and functional networks has been reported for Arabidopsis. Sixty-seven pectin lyase genes have been identified, and most of them possess signal sequences targeting the secretory pathway. Phylogenetic analyses identified five gene groups with considerable conservation among groups. Pectin lyase genes were non-randomly distributed across chromosomes and clustering was evident. Functional divergence and adaptive evolution analyses suggested that purifying selection was the main force driving pectin lyase evolution, although some critical sites responsible for functional divergence might be the consequence of positive selection. A stigma- and receptacle-specific expression promoter was identified, and it had increased expression in response to wounding. Two hundred and eighty-eight interactions were identified by functional network analyses, and most of these were involved in cellular metabolism, cellular transport and localization, and stimulus responses. This investigation contributes to an improved understanding of the complexity of the Arabidopsis pectin lyase gene family. © 2012 Jun Cao.
Jiangsu University | Date: 2014-06-25
Disclosed is a method for detecting movement speed uniformity of a scanned target in a line scanning imaging process. The method comprises a first step of acquiring a scan image of a rectangular correction plate ABCD, a second step of performing data processing on a scan image ABCD and a third step of calculating a uniformity representation value S of the movement speed of the scanned target. The uniformity of the movement speed of the scanned target can be calculated quantitatively, and the method can be used for precisely correcting a line scanning imaging system, so that high-precision image information about the scanned target is obtained, and the method can be applied to high-precision computer vision detection of the scanned target.
Jiangsu University | Date: 2015-09-09
The present invention discloses an automatic control element with uniformly-distributed stepping frequency, comprising a sprinkler and a fluidic element connected to the sprinkler, an outlet cover plate being secured onto an outlet of the fluidic element. A water inlet and a first air supply pore are formed symmetrically on the fluidic element, and a second air supply pore is formed on the water inlet. A water distributor is formed on the sprinkler, a water tank is provided on the outer side of the sprinkler, and the water distributor is in communication with an inner cavity of the water tank. A signal nozzle is provided on the wall of the water tank, and the signal nozzle is connected to the water inlet via a conduit. The additional arrangement of one water tank on the sprinkler overcomes the defect of use of air-water mixture only as signal water in the prior art, and solves the problems that a fluidic sprinkler head has a stepping frequency not so uniform and may fail to take signal water to complete the rotation action.
Jiangsu University | Date: 2014-07-09
Herein presents a few-mode optical fiber, wherein the core comprising a main core (1) and 2N assistant cores (2), wherein N is positive integer number. All the cores are formed by the same material and embedded in a low-index background (3). The centers of the main core (1) and all the assistant cores (2) are located in a straight line. The assistant cores (2) are denoted based on the distance with the main core (1) as 1, 2, . . . N. The center-to-center distance between the main core (1) and the adjacent assistant core (2) is L_(ma)=d_(m)+d_(a1). The center-to-center distance between the assistant core (2) and the adjacent assistant core (2) is L_(i,i+1)=d_(a,i)+d_(a,i+1), wherein i=1N1 and d_(a,i )denotes the diameter of assistant core (2) i. That is to say, the boundary of the main core (1) is tangent to the boundary of the adjacent assistant core (2). Also the boundaries of the adjacent assistant cores (2) are tangent.
Jiangsu University | Date: 2014-07-09
Herein presents an optical fiber microwire device, wherein the device comprising a silica tube, an optical fiber (2) inserted into the silica tube (1) and pigtailed at two sides, wherein the two ends of the silica tube (1) are fused with the optical fiber (2) to form a solid structure, or the two ends of the silica tube (2) are filled with silica rods (3), silica capillaries (4) or segments of optical fibers and fused to form a solid structure. The silica tube (1) together with the optical fiber (2) inside is then tapered to form a micro structure region. Therefore, the micro structure region is consisted of the tapered optical fiber as the microstructure core, tapered silica tube, and the air in between. This invention combine the manufacture of optical fiber microwire and the sealing process, avoiding the disadvantages of the conventional tapered optical fiber microwire, such as fragile mechanical structure, and sensitive to the outer environment variations.
Jiangsu University | Date: 2015-04-29
The invention involves a method and a device that converting the summer-autumn tea concentrate to instant powdered black tea by oxidation reaction. The method is comprised of the following steps: pushing the summer-autumn tea concentrate and oxygen into a long spiral pipe, making them flow, impact, and mix in a high speed which can achieve a high efficient oxidation; the intelligent control of the oxidation process can be realized by the change of the color of the concentrate in the oxidation process; the color value of the concentrate can be detected in real time by peristalsis pump, which flows into the color detection channel based on the multi spectral flash LED light transmission technology; the oxidation can be stopped immediately when the detected chromatic value is within the range of the preset target chromatic value. The patent also provides a device for aerating oxygen, including summer-autumn tea concentrate liquid storage tank, gas-liquid mixing pipe loop and color pipeline detection circuit. The process and the device can realize the oxidation of summer-autumn tea concentrate in a fast, uniform and sufficient way, and can also achieve the process that can improve the quality of instant black tea.