Kai Lin

Chengdu University of Technology

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Lian Zhao

China University of Petroleum, East China

Xiaotao Wen

Chengdu University of Technology

Yuqiang Zhang

Shandong University

Ningfang Liao

Beijing Institute of Technology

Junxing Cao

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

Xilei He

Chengdu University of Technology

Wenliang Xiang

Xihua University

Shuwen Dong

Beijing University of Chemical Technology

Chunhong Yuan

Iwate University

Xiaojun Xiong

Shanghai Polytechnic University

Cooperative Institutions

Chengdu University of Technology

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

Xihua University

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Beijing Institute of Technology

Southwest Petroleum University

Chinese Academy of Medical Sciences & Peking Union Medical College

Sun Yat-sen University

Chengdu University

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Preliminary Study on Applicability of Microsatellite PrimersDeveloped from Common Carp for Genomic Analysis of Grass Carp

Jiguang shengwu xuebao (2003)

Kai Lin

In order to determine the applicability of microsatellite primers developed from common carp (Cyprinus carpio) for genomic analysis in grass carp (Ctenopharyngodon idellus), twentyeight pairs of common carp primers designed for microsatellites containing CA motifs were employed to amplify the microsatellite loci in the genome of grass carp. The conditions of polymerase chain reaction (PCR) were optimized for the fidelity of DNA synthesis during PCR amplification. Two kinds of nonspecific PCR products, heteroduplex bands and shadow bands, were eliminated successfully by decreasing the extension temperature and Mg2+ concentration. 7 primers (about 25%) amplified specific products successfully and 4 primers (about 14.3%) have shown the polymorphism in a small population of the wild grass carp of xiangiang river (only 8 samples of fish). This result indicates that there are about 50% homology of sequences flanking the microsatellite loci between the common carp and grass carp, and some of the common carp microsatellite primers can be used for grass carp genetic analysis without much costing and time consuming.

Grass carp

Common carp

genomic DNA

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Sensory Quality of Tea Recycled Sheet and Its Use in Cigarette

Guangdong nongye kexue (2010)

Kai Lin

In this study,the smoke gas and sensory quality of tea recycled sheets were evaluated,and the use of tea recycled sheets in cigarette CPY-1 and CPY-2 was explored.The results indicated that the nicotine content in the smoke gas of tea recycled sheet was zero.Two kinds of ultra-low tar(3 mg) cigarettes were produced by using tea recycled sheets,and their contents of tar,nicotine,total particulate matter and carbon monoxide were noticeably reduced.Blending the tea recycled sheet into CPY-1 cigarette could improve its sensory quality.Adding different proportions of tea recycled sheet into CPY-2 cigarette could improve its sensory quality and produce different styles of products.The production cost of tea recycled sheet was less than that of tobacco recycled sheet.

tar (computing)

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AVO forwarding modeling in two-phase media: multiconstrained matrix mineral modulus inversion

Applied Geophysics (2014)

Kai Lin Zhenhua He Xiaojun Xiong Xilei He Junxing Cao

Reflection coefficient

Lithology

Inverse transform sampling

Saturation (graph theory)

10.1007/s11770-014-0457-x

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Study on Applying Complex Enzyme Technology to Improve Quality of Tobacco Stem Concentrated Solution

Lijun Dai Shi Jian-zai Bin Zheng Shu-Yu Lin Kai Lin

In order to improve the quality of tobacco stem concentrated solution,the complex enzyme technology was applied to the reconstituted tobacco leaves produced by paper-making process.The results showed that the optimum dosages of amylase,pectinase and xylanase were 0.5%,0.5% and 1.0%,respectively.The optimum conditions for the application of complex enzymes were pH 4.91 and temperature 55 ℃.The pH-value and temperature of stem-washing solution could be constantly controlled,and the stem-washing solution could be filtrated.The water soluble sugar content in the tobacco stem,stem cream and reconstituted tobacco leaf changed greatly after the application of complex enzymes.The stem-washing technology by using complex enzymes could obviously improve the inherent quality of the reconstituted tobacco leaves.

Stem-and-leaf display

Reducing sugar

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Analysis of Essential Oil from Phyllostachys glauca Leaves

Kai Lin

The essential oil was extracted from the leaves of Phyllostachys glauca McClure by simultaneous distillation extraction(SDE) and isolated by GC-MS.The results showed that 41 compounds in the essential oil were identified.Its main components whose relative content was higher than 5 per cent were hexadecanoic acid,farnesylacetone,phytol,caryophyllene,7,11-dimethyl-3-methylene-1,6,10-dodecatriene.The proportion of these five components was 58.6 per cent.Aldehyde had the most kinds of compounds(12 kinds),and their relative content was 11.56 per cent.Five kinds of ketone had the highest relative content(25 per cent).The relative content of 3 kinds of acid reached to 21.46 per cent.Many components of the essential oil extracted from Phyllostachys glauca leaves had good smell and high developmental and utilization value.

Phyllostachys

Phytol

Steam distillation

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The effect of chromatic background for luminance contrast-sensitivity function

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2012)

Song Li Ningfang Liao Shuwen Dong Ting Liao Weigui Hu

The effect of chromatic background on luminance contrast-sensitivity function (CSF) is studied. We selected three background-grey, orange and yellow-green from CIE 17 color center. The mean luminance of these colors is approximately equal. We use CRT monitor display the rectangular stripe. Every rectangular stripe has six spatial frequencies (0.4, 1, 2, 3.5,7 and 14cpd) .The method of limits is used in the experiment, 5 observers, who have normal vision and test of vision is all over 1.0, participated in the experiment. The results of experiment show that the luminance contrast sensitivity on chromatic background is lower than the luminance contrast sensitivity under grey background. Fitting results show that Movshon model is better than Barten model, especially for the chromatic background. Both of the models have deviation in the high spatial frequency part.

Spatial frequency

Contrast ratio

10.1117/12.2014170

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Design of an Optical Receiver for Multi-core Optical Fiber

2022 7th International Conference on Communication, Image and Signal Processing (CCISP) (2023)

Xuan Yu Mingju Xin Kai Lin Jiajin Li Kaizhuo Chen

This paper presents an optical receiver designed to match multiple core optical fiber, implemented in a 0.18 $\mu\mathrm{m}$ CMOS process. The chip consists of a photodiode (PD) array and transimpedance (TIA) circuits, including the TIA core, Bandgap (BG) and Bias. The placement of PD array is highly matched with the multiple core optical fiber and each PD is followed by a TIA. The TIA achieves a 60 dB ohm transimpedance gain with a 200 MHz bandwidth and the input reference current noise is $7.2 \text{pA} / \sqrt{ } \text{Hz}$ . The BG can stably output a 1.2 V voltage and shows a good stability in the post simulation under 128 process corners. The Bias can provide the current required to drive TIA through a mirror transistor. Eye diagrams are shown when operating at bit rates of 200 M bps and 300 M bps with a forward input reference voltage of 1.2 V. While achieving high transmission efficiency, the chip area is only $0.78\times 0.92$ mm2 which allows for more compact designs and suit for a wide range of application scenarios.

Transimpedance amplifier

Photodiode

10.1109/ccisp59915.2023.10355805

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Direct inversion of brittleness index in time-frequency mixed domain

Geoenergy Science and Engineering (2024)

Tianyue Zhang Kai Lin Xiaotao Wen Yuqiang Zhang Lian Zhao

Brittleness

Noise immunity

Inverse transform sampling

Random noise

10.1016/j.geoen.2024.212920

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Data-driven acoustic impedance inversion with reweighted L1 norm sparsity constraint

Frontiers in Earth Science (2023)

Lian Zhao Kai Lin Xiaotao Wen Yuqiang Zhang

Acoustic impedance (AI) inversion is widely used in geophysics and reservoir prediction. But the traditional impedance inversion method cannot fully exploit the sparse characteristics of geological attributes. There are problems with multiplicity and low resolution. To solve this problem, a data-driven acoustic impedance inversion method with reweighted L1 norm constraints (DRL1) is proposed. In the inversion process, the reweighted L1 norm and local cross-correlation analysis are introduced to solve the above problems. The reweighted L1 norm is introduced as a sparse constraint (RL1) to replace the traditional inversion method which is constrained by L1 norm. The RL1 method can describe more sparsity information and improve the resolution of inversion. In addition, the quality of seismic data plays a decisive role in seismic inversion. We add local cross-correlation analysis to the inversion process. We evaluated the rationality of each sampling point in the seismic data by introducing cross-correlation analysis, controlling for their contribution to the inversion, making inversion results more stable and accurate. The inversion objective function is solved by the alternating direction multiplier method (ADMM) algorithm and soft threshold shrinkage algorithm. Finally, we validate the effectiveness of the proposed method through model tests and field data. The results show that our proposed method not only provides a more accurate portrayal of the stratigraphy, but also yields more accurate inversion results.

Inverse transform sampling

Acoustic impedance

10.3389/feart.2023.1191077

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Porosity estimation based on the rock skeleton general formula and comprehensive pore structure parameter — An application to a tight-sand reservoir

Interpretation (2021)

Kai Lin Xilei He Bo Zhang Xiaotao Wen Zhenhua He

Most of the current 3D reservoir porosity estimation methods are based on analyzing the elastic parameters inverted from seismic data. It is well-known that elastic parameters vary with the pore structure parameters such as the pore aspect ratio, consolidation coefficient, and critical porosity. Thus, we may obtain inaccurate 3D porosity estimation if the chosen rock-physics model fails to properly address the effects of the pore structure parameters on the elastic parameters. However, most of the current rock-physics models only consider one pore structure parameter such as the pore aspect ratio or the consolidation coefficient. To consider the effect of multiple pore structure parameters on the elastic parameters, we have developed a comprehensive pore structure (CPS) parameter set that is generalized from current popular rock-physics models. The new CPS set is based on the first-order approximation of current rock-physics models that consider the effect of the pore aspect ratio on the elastic parameters. The new CPS set can accurately simulate the behavior of current rock-physics models that consider the effect of pore structure parameters on the elastic parameters. To demonstrate the effectiveness of the proposed parameters in porosity estimation, we use a theoretical model to demonstrate that our CPS parameter set properly addresses the effect of pore aspect ratio on elastic parameters such as velocity and porosity. Then, we obtain a 3D porosity estimation for a tight sand reservoir by applying it seismic data. We also predict the porosity of the tight sand reservoir using a neural network algorithm and a rock-physics model that is commonly used in porosity estimation. The comparison demonstrates that the predicted porosity has a higher correlation with the porosity logs at blind well locations.

Consolidation

10.1190/int-2021-0001.1

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Citations (6)