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LiHua Cui,De Li,HyeJeong Kim 보안공학연구지원센터 2014 International Journal of u- and e- Service, Scienc Vol.7 No.5
M & A is an important means for enterprises to achieve the rapid growth and development, is one of the important strategy for continuous operation in the process of company. M & A of knowledge assets is a kind of business means of rapid access to core technology and knowledge. More and more enterprises want to strengthen their ability through the M & A of other knowledge assets of enterprises, to enhance the market competitiveness of enterprises. With the development of M & A of knowledge assets, the enterprise wants to use the unique knowledge assets to increase the listed company's market performance and improve the financial structure of listed company. This paper draw some conclusions through the study of Chinese listed company which have taken knowledge assets mergers and acquisitions, to help people find some problems in the process of knowledge assets in mergers and acquisitions of listed companies, in order to provide some reference for China's listed companies in the M & A of knowledge assets.
Study on Chinese Listed Companies Assets Stripping Motivation and Short-term Performance
LiHua Cui,HuiJun Jin,HyeJeong Kim,De Li 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.8
Under the domestic and international market increasingly competitive circumstances, how to improve the management efficiency, restructuring of the industrial chain, improve the core competitive ability of enterprises is the issue of China’s enterprises must face. The objective of this study is to hope that through the empirical performance of China’s listing Corporation asset market analysis, in-depth study of divestiture announcement effect on stock price, to help people fully understand the important role of divestiture in the process of enterprise development. To provide some references for formulating relevant policies to restructure decision for the company, government and regulatory departments. This paper uses divestiture announcement between 2005 and 2013 as sample data, according to the selection standards, selected 324 divestiture announcement for the final study sample, makes an empirical analysis of the market performance of assets stripping and its influencing factors. The analysis results show: 1. More and more investors are optimistic about the asset stripping, asset divestiture announcement to increase shareholder wealth. But in the process of assets transaction there may exist the phenomenon of information disclosure and insider trading in advance. In addition, different stripping assets under the market performance is different. Under the way of equity stripping assets announcement effect is better than the physical assets way. 2. The greater the proportion of the first big shareholder holds, the impact of asset divestiture market performance is small. A listed company on ownership concentration is higher, the big shareholders often use information asymmetry infringe upon the interests of small shareholders, and the strategic decisions such as enterprise assets are greatly influenced by the large shareholders, lead to divest decision may not be voluntary. According to the theory of corporate governance, ownership concentration lower enterprise strategic decision is based on the principle of the enterprise value maximization, thus when ownership concentration is low enterprise assets announcement, the market will give positive response.
Filtering for Discrete-time Linear Noise Delay Systems
Peng Cui,Huanshui Zhang,Lihua Xie,Chenghui Zhang 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.5
Optimal state estimation problem for discrete-time systems with delays in noise sequence is investigated. Predictor similar to the traditional Kalman ones is derived based on projection formula in Hilbert space. Filter and fixed-lag smoother are obtained at the same time. The estimators are presented by solving two coupled Riccati-type difference equations. One example shows the effectiveness of the proposed approach.
( Zhimin Ou ),( Jiahui Xu ),( Lihua Du ),( Lan Tang ),( Yangping Niu ),( Jian Cui ) 한국미생물생명공학회(구 한국산업미생물학회) 2018 Journal of microbiology and biotechnology Vol.28 No.4
In this study, interface-assembled carbonyl reductase (IACR) was prepared and used in the synthesis of S-licarbazepine in a toluene/Tris-HCl biphasic system. The carbonyl reductase (CR) was conjugated with polystyrene to form a surfactant-like structure at the interface of the toluene/Tris-HCl biphasic system. The interface-assembled efficiency of IACR reached 83% when the CR (180 U/mg) and polystyrene concentration were 8 × 10<sup>2</sup> g/ml and 3.75 × 10<sup>3</sup> g/ml, respectively. The conversion reached 95.6% and the enantiometric excess of S-licarbazepine was 98.6% when 3.97 × 10<sup>6</sup> nmol/l oxcarbazepine was converted by IACR using 6% ethanol as a co-substrate in toluene/Tris-HCl (12.5:10) at 30°C and 43 ×g for 6 h. IACR could be reused efficiently five times.
A Zero-Watermark Scheme for Identification Photos based on QR Code and Visual Cryptography
De Li,Zhe Liu,LiHua Cui 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.1
This paper proposes a zero-watermark scheme for identification photos based on QR code and visual cryptography. The method makes no changes to original images while embedding the QR code watermark. In order to ensure the security, we use Arnold transformation to scrambling the watermark. In the scheme, we use discrete wavelet transform and matrix norm computing to generate the invariant feature values against print-scan attacks. Then the VC scheme is applied to generate the secret image from the feature values and the disturbed watermark by using a codebook. In the extraction scheme, we get the secret image which is registered to certification authority and the feature values extracted from the examined image with VC scheme, and then apply inverse Arnold transformation to restore the watermark, finally repair position patterns of the QR code. The experimental results show that the proposed algorithm is effective and robust against attacks such as JPEG compression, add noise, multiple filters, scale, little angle rotation and crop, especial print-scan attacks.
Hui Jin,Haiyan Cui,Xiaoyan Yang,Lihong Xu,Xudong Li,Rentao Liu,Zhiqiang Yan,Xiuzhuang Li,Weili Zheng,Yuhui Zhao,Xiaoxia Song,Lihua Zhong,Anxiang Su,Bo Qin 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.4
Aphelenchoides besseyi and Ditylenchus destructor can cause serious problems for a number of important agricultural crops and vegetables. In this study, the ethanol extract of Stellera chamaejasme L. roots showed strong nematicidal activity against Aphelenchoides besseyi and Ditylenchus destructor. By using a bioactivity-driven fractionation, three biflavonoids were isolated from the extract and their structures were identified by mass and nuclear magnetic resonance spectral data. Nematicidal activity bioassays revealed that isoneochamaejasmin A had the strongest nematicidal activity against A. besseyi and D. destructor with LC 50 values of 2.32 and 0.18 mM at 72 h, respectively. Chamaejasmenin B displayed weaker nematicidal activity against A. besseyi with an LC 50 value of 3.94 mM at 72 h. Neochamaejasmin B induced the lowest mortality against D. destructor with an LC 50 values of 15.6 mM at 72 h. These results suggested that the kind and position of substitutions and the relative configuration of 2-H/3-H and 2”-H/3”-H could be considered as important factors responsible for the nematicidal activity of these purified C-3/C-3″ biflavonoids.
Text Recognition Algorithm Based on Text Features
De Li,XueZhe Jin,LiHua Cui 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.5
It is difficult to realize the text watermarking algorithm on natural language, and the format of text watermarking algorithm has poor robustness against format attacks. This paper presents the new text recognition algorithm based on the text feature. The words are segmented and extracted according to the text feature. The feature dimensions are reduced with the technology of LSA and stop-words database. The new similarity method is also defined to determine the threshold in order to detect the watermarking. The experimental results indicate that the proposed algorithm has better operating efficiency and stronger robustness than the previous researches. This algorithm can also handle the text document written in both Chinese and English effectively.
Lv, Xianliang,Hao, Junfang,Wu, Lihua,Liu, Mengyuan,He, Lei,Qiao, Yingying,Cui, Yanyan,Wang, Guan,Zhang, Chunmei,Qu, Hongxia,Han, Jincheng Asian Australasian Association of Animal Productio 2022 Animal Bioscience Vol.35 No.12
Objective: This research aimed to evaluate the effects of age on growth, tibia development, and intestinal calcium (Ca) and phosphorus (P) transporter gene expressions in broiler chickens. Methods: A total of 224 male Arbor Acres broilers were fed with nutrient-adequate diets and reared in eight cages (28 broilers per cage). Eight broilers (one broiler per cage) were selected and killed at 5, 10, 15, 20, 25, 30, 35, and 40 days of age, respectively. Results: Body weight continuously increased with age of broiler chickens from 5 to 40 days. The bone weight, ash weight, diameter, and length of the tibia also increased with broiler age. By contrast, the tibia ash, Ca, and P percentages quadratically changed with age (p<0.001), and the highest values of mineral contents were observed at 20, 25, and 25 days of age, respectively. The mRNA abundances of calcium-binding protein 28-kDa (CaBP-D28k), sodium-calcium exchanger 1 (NCX1), and plasma membrane ATPase 1b (PMCA1b) increased from 5 to 25 days and then decreased up to 40 days. Similar results were noted in the mRNA abundances of IIb sodium-phosphate cotransporter (NaPi-IIb), inorganic phosphate transporter 1 (PiT-1), inorganic phosphate transporter 2 (PiT-2), nuclear vitamin D receptor (nVDR), and membrane vitamin D receptor (mVDR). The mRNA abundances of Ca and P transporters and VDRs were the highest at 25 days of age. Conclusion: These data indicate that age quadratically affects intestinal Ca and P transporter gene expression and mineral absorption capacity in broiler chickens.