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Visual salience guided feature-aware shape simplification

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第9期15卷 744-753页

作者： Yong-wei MiAO Fei-xia HU Min-yan chen Zhen LiU Hua-hao shou College of Computer Science and Technology Zhejiang University of Technology College of Science Zhejiang University of Technology

in the area of 3D digital engineering and 3D digital geometry processing, shape simplification is an important task to reduce their requirement of large memory and high time complexity. By incorporating the content-aware visual salience measure of a polygonal mesh into simplification operation, a novel feature-aware shape simplification approach is presented in this paper. Owing to the robust extraction of relief heights on 3D highly detailed meshes, our visual salience measure is defined by a center-surround operator on Gaussian-weighted relief heights in a scale-dependent manner. Guided by our visual salience map, the feature-aware shape simplification algorithm can be performed by weighting the high-dimensional feature space quadric error metric of vertex pair contractions with the weight map derived from our visual salience map. The weighted quadric error metric is calculated in a six-dimensional feature space by combining the position and normal information of mesh vertices. Experimental results demonstrate that our visual salience guided shape simplification scheme can adaptively and effectively re-sample the underlying models in a feature-aware manner, which can account for the visually salient features of the complex shapes and thus yield better visual fidelity.

关键词： Visual salience Shape simplification Content-aware Weighted quadric error metric Feature-aware

A new fluorinated poly(ether amide) bearing xanthene group

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Chinese Chemical Letters 2010年第10期21卷 1247-1250页

作者： Ting Li shou Ri Sheng Mei Hong Wei cheng chen Cai Sheng Song College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang 330022China

A new fluorinated poly(ether amide) bearing xanthene group was prepared from 9,9-bis[4-(2-trifluoromethyl-4-aminophenox- y)phenyl]xanthene (BTFAPX) with 9,9-bis[4-(4-carboxyphenoxy)phenyl]xanthene (BCAPX) in the presence of triphenyl phos- phate and pyridine (Py). The polymer had the weight-average molecular weight (Mw) of 69,000 and number-average molecular weight (Mn) of 39,000, showed the glass transition temperature (Tg) of 267 ℃, 5% weight loss temperature (Tds) over 460 ℃ both in N2 and air, and char yield of 62% at 800 ℃ in N2. This polymer was amorphous and readily soluble in amide-type solvents such as N,N-dimethylacetamide (DMAc), and even in m-cressol, Py and tetrahydrofuran (THF) at room temperature, and exhibited tensile strength of 74 MPa, elongation at break of 6%, tensile moduli of 2.2 GPa. The polymer had low dielectric constant of 3.69 (100 Hz), low moisture absorption of 0.56%, and high transparency with an ultraviolet-visible absorption cut-off wavelength at 334 nm.

关键词： Fluorinated polyamide Xanthene group Trifluoromethyl substituents

Magnetic and Transport Properties of Bi_(0.5)Ca_(0.5–x)La_xFe_(0.3)Mn_(0.7)O_3(x=0, 0.05, 0.10, 0.15, 0.20, 0.25) Prepared by Molten Salt Method

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Chemical Research in Chinese Universities 2011年第1期27卷 15-18页

作者： DONG Zhong-ping HU Bin chen Yan YUAN Hong-ming FENG shou-hua State Key Laboratory of inorganic Synthesis ＆ Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

Polycrystallines Bi0.5Ca0.5-xLaxFe0.3Mn0.7O3（x=0, 0,05, 0.10, 0.15, 0.20, 0.25） were prepared by molten salt method and showed perovskite orthorhombic structure with space group Pnma. The magnetic measurements indicate that the compounds exhibit antiferromagnetic behavior in a temperature range of 4-300 K. The measurements of transport properties suggest that the substitution of La for Ca enhanced the conductivity, and a kink appeared on the curve of temperature dependence of resistivity at 275 K, which is related to the spin-reorientation in the samples.

关键词： Perovskite Doping Magnetism Spin-reorientation

Management of pesticide residues in China

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Journal of integrative Agriculture 2015年第11期14卷 2319-2327页

作者： chen Zeng-long DONG Feng-shou XU Jun LiU Xin-gang ZHENG Yong-quan institute of Plant Protection Chinese Academy of Agricultural Sciences

This paper reviewed management of pesticide residues in China including laws and regulations, the supervision system, the standard system, and the quality and safety of agricultural products. The process of establishment and internationalization of standards for pesticide residues were also discussed. Results indicate that the progress of the management of pesticide residues has been steadily made in China. However, the following aspects which refer to updates to regulations, supervising efficiency, standard system, risk assessment, international cooperation and communication, should be further improved. China should draw lessons from international experience, and then establish its own management system, which focuses on pesticides controls by strictly following relevant laws and technical standards to ensure the quality and safety of agricultural products.

关键词： pesticide residue standard system supervision system development trend

Projection bias, sophistication, and sub-additive discounting

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Journal of Management Science and Engineering 2019年第2期4卷 158-171页

作者： shou chen Richard Fu Lei Wedge Ziran Zou Business School Hunan UniversityChangsha410082China Collat School of Business University of Alabama at BirminghamBirminghamAL35294USA Muma College of Business University of South FloridaTampaFL33620USA

Behavioral studies have revealed the sub-additive discounting pattern,which is at odds with the prevailing hyperbolic discounting framework that explains intertemporal *** this study,we demonstrate that completely and partially sophisticated individuals who are aware of their shifting preferences over time may exhibit sub-additive discounting *** importantly,these behaviors are not determined by whether an individual has hyperbolic time preferences or ***,we show that the choices of reference points and partial projection bias may be the underlying drivers of the observed sub-additive discounting.

关键词： Hyperbolic discounting Non-hyperbolic discounting Sub-additive discounting Projection bias Reference point

Layer-by-layer assembly of procyanidin and collagen promotes mesenchymal stem cell proliferation and osteogenic differentiation in vitro and in vivo

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Regenerative Biomaterials 2023年第1期10卷 333-343页

作者： Zhibiao Bai Kai Hu Zeyu shou Jiahuan Yu Hongming Meng Han Zhou Liangyan chen Tiantian Yu Ruofei Lu Na Li Chun chen Department of Orthopaedics The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000P.R.China Wenzhou Medical University Wenzhou 325000P.R.China Wenzhou Key Laboratory of Perioperative Medicine Oujiang Laboratory(Zhejiang Lab for Regenerative MedicineVision and Brain Health)Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou 325001P.R.China Xinjiang Technical institute of Physics and Chemistry Chinese Academy of SciencesUrumqi 830011P.R.China

Collagen,commonly used in tissue engineering,is widespread in various *** bone tissue regeneration,collagen can stimulate the cellular response and determine the fate of *** this work,we integrated collagen type ii with procyanidin(PC)onto an implant coating by applying a layer-by-layer technique to demonstrate that collagen and PC can participate in the construction of new biomaterials and serve as multifunctional *** effects of PC/collagen multilayers on the viability of cocultured bone marrow mesenchymal stem cells(BMSCs)were analyzed by cell counting kit-8 analysis and phalloidin *** reactive oxygen species level of BMSCs was revealed through immunofluorescent staining and flow ***-related genes were detected,and in vivo experiment was performed to reveal the effect of newly designed material on the osteogenic differentiation of *** data demonstrated that in BMSCs PC/collagen multilayers accelerated the proliferation and osteogenic differentiation through Wnt/β-catenin signaling pathway and enhanced bone generation around the implant in the bone defect model of rabbit *** summary,combination of collagen and PC provided a new sight for the research and development of implant materials or coatings in the future.

关键词： bone marrow mesenchymal stem cells osteogenesis collagen procyanidine coating

Artificial Cycle with or without a Depot Gonadotropin-releasing Hormone Agonist for Frozen-thawed Embryo Transfer： An Assessment of infertility Type that is Most Suitable

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Current Medical Science 2018年第4期38卷 626-631页

作者： Di XiE Fan chen shou-zhen XiE Zhi-lan chen Ping TUO Rong ZHOU Juan ZHANG Reproductive Medical Centre Wuhan General Hospital of Guangzhou Military Region Wuhan 430070 China Key Laboratory of Agricultural Animal Genetics Breeding and Reproduction Education Ministry of China College of Animal Science and Technology Huazhong Agricultural University Wuhan 430070 China

The clinical outcomes of five groups of infertility patients receiving frozen- thawed, cleavage-stage embryo transfers with exogenous hormone protocols with or without a depot gonadotropin-releasing hormone （GnRH） agonist were assessed. A retrospective cohort analysis was performed on 1003 cycles undergoing frozen-thawed, cleavage-stage embryo transfers from January 1, 2012 to June 31, 2015 in the Reproductive Medicine Center of Wuhan General Hospital of Guangzhou Military Region. Based on the infertility etiologies of the patients, the 1003 cycles were divided into five groups： tubal infertility, polycystic ovary syndrome （PCOS）, endometriosis, male infertility, and unexplained infertility. The main outcome was the live birth rate. Two groups were set up based on the intervention： group A was given a GnRH agonist with exogenous estrogen and progesterone, and group B （control group） was given exogenous estrogen and progesterone only. The results showed that the baseline serum hormone levels and basic characteristics of the patients were not significantly different between groups A and B. The live birth rates in groups A and B were 41.67% and 29.29%, respectively （P〈0.05）. The live birth rates in patients with PCOS in groups A and B were 56.25% and 30.61%, respectively （P〈0.05）. The clinical pregnancy, implantation and on-going pregnancy rates showed the same trends as the live birth rates between groups A and B. The ectopic pregnancy rate was significantly lower in group A than in group B. We concluded that the live birth rate was higher and other clinical outcomes were more satisfactory with GnRH agonist co- treatment than without GnRH agonist co-treatment for frozen-thawed embryo transfer. The GnRH agonist combined with exogenous estrogen and progesterone worked for all types of infertility tested, especially for women with PCOS.

关键词： frozen-thawed embryo transfer gonadotropin-releasing hormone agonist polycystic ovary syndrome

Detailed profiling of carbon fixation of in silico synthetic autotrophy with reductive tricarboxylic acid cycle and Calvin-Benson-Bassham cycle in Esherichia coli using hydrogen as an energy source

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Synthetic and Systems Biotechnology 2019年第3期4卷 165-172页

作者： Hsieh-Ting-Yang cheng shou-chen Lo Chieh-chen Huang Tsung-Yi Ho Ya-Tang Yang Department of Computer Science National Tsing Hua UniversityHsinchu30013TaiwanR.O.C Department of Life Sciences National Chung-Hsing UniveristyTaichungTaiwanR.O.C Department of Electrical Engineering National Tsing Hua UniversityHsinchu30013TaiwanR.O.C Program in Microbial Genomics National Chung Hsing UniversityTaichungTaiwanR.O.C innovation and Development Center of Sustainable Agriculture National Chung Hsing UniversityTaichungTaiwanR.O.C

Carbon fixation is the main route of inorganic carbon in the form of CO2 into the *** nature,RuBisCO is the most abundant protein that photosynthetic organisms use to fix CO2 from the atmosphere through the Calvin-Benson-Bassham(CBB)***,the CBB cycle is limited by its low catalytic rate and low energy *** this work,we attempt to integrate the reductive tricarboxylic acid and CBB cycles in silico to further improve carbon fixation *** heterologous enzymes,mostly carboxylating enzymes,are inserted into the Esherichia coli core metabolic network to assimilate CO2 into biomass using hydrogen as energy ***,such a strain shows enhanced growth yield with simultaneous running of dual carbon fixation *** key results include the following.(i)We identified two main growth states:carbon-limited and hydrogenlimited;(ii)we identified a hierarchy of carbon fixation usage when hydrogen supply is limited;and(iii)we identified the alternative sub-optimal growth mode while performing genetic *** results and modeling approach can guide bioengineering projects toward optimal production using such a strain as a microbial cell factory.

关键词： Reductive tricarboxylic acid cycle Calvin-Benson-Bassham cycle Carbon fixation Metabolism

N-fold Darboux Transformation for integrable Couplings of AKNS Equations

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Communications in Theoretical Physics 2018年第4期69卷 367-374页

作者： Jing Yu shou-Ting chen Jing-Wei Han Wen-Xiu Ma School of Science Hangzhou Dianzi University Hangzhou 310018 China School of Mathematics and Physical Science Xuzhou Institute of Technology Xuzhou 221111 China School of information Engineering Hangzhou Dianzi University Hangzhou 310018 China Department of Mathematics and Statistics University of South Florida Tampa FL 33620-5700 USA College of Mathematics and Systems Science Shandong University of Science and Technology Qingdao 266590 China international institute for Symmetry Analysis and Mathematical Modeling Department of Mathematical Sciences North-West University Mafikeng Campus Private Bag X2046 Mmabatho 2735 South Africa

For the integrable couplings of Ablowitz-Kaup-Newell-Segur(iCAKNS) equations, N-fold Darboux transformation(DT) TN, which is a 4 × 4 matrix, is constructed in this paper. Each element of this matrix is expressed by a ratio of the(4N + 1)-order determinant and 4N-order determinant of eigenfunctions. By making use of these formulae,the determinant expressions of N-transformed new solutions p^([N ]), q^([N ]), r^([N ])and s^([N ])are generated by this N-fold ***, when the reduced conditions q =-p*and s =-r*are chosen, we obtain determinant representations of N-fold DT and N-transformed solutions for the integrable couplings of nonlinear Schr?dinger(iCNLS) *** from the zero seed solutions, one-soliton solutions are explicitly given as an example.

关键词： Darboux transformation integrable couplings of the AKNS equations determinant representation