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Multifractal methods for rapeseed nitrogen nutrition qualitative diagnosis modeling

International Journal of Biomathematics 2016年第4期9卷 285-297页

作者： Jian-Hui li Fang Wang jin-wei li Rui-Biao Zou Gui-Ping liao Agricultural Information Institute Hunan Agricultural University Changsha 410128 P. R. China Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China Changsha 410128 P. R. China College of Science Hunan Agricultural University Changsha 410128 P. R. China

Nutrition diagnosis plays a key role in the crop＇s growth, which has mainly been car- ried out in the field by agricultural workers. Currently, automatic nutrition recognition technologies have been widely used in this field. A procedure is proposed in this paper to diagnose nitrogen nutrition non-destructively for rapeseed qualitatively based on the multifractal theory. Twelve texture parameters are given by the method of multifractal detrended fluctuation （MF-DFA）, which contains six generalized Hurst exponents and six relative multifractal parameters that are used as features of the rapeseed leaf images for identifying the two nitrogen levels, namely, the N-mezzo and the N-wane. For the base leaves, central leaves and top leaves of the rapeseed plant and the three-section mixed samples, three parameters combinations are selected to conduct the work. Five classifiers of Fisher＇s linear discriminant algorithm （LDA）, extreme learning machine （ELM）, support vector machine and kernel method （SVMKM）, random decision forests （RF） and K-nearest neighbor algorithm （KNN） are employed to calculate the diagno- sis accuracy. An interesting finding is that the best diagnose accuracy is from the base leaves of the rapeseed plant. It is explained that the base leaf is the most sensitive to the nitrogen deficiency. The diagnose effect by the base leaves samples is outshining the existing result significantly for the same leaves samples. For the mixed samples, the aver- aged discriminant accuracy reaches 97.12% and 97.56% by SVMKM and RF methods with the 10-fold cross-validation respectively. The resulting high accuracy on N-levels identification shows the feasibility and efficiency of our method.

关键词： Rapeseed leaf image nitrogen diagnosis multifractal detrended fluctuationanalysis classifiers.

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Design and Synthesis of a Novel Peptidomimetic Inhibitor of Caspase-3

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Chemical Research in Chinese Universities 2006年第2期22卷 225-228页

作者： ZHANG jin-liang liU lin-hua GUO Yang-hong YANG jin-gang li wei ZHONG Da-fang WANG Ji-dong College of life Science Jilin University Changchun 130021 P. R. China

Caspases, a family of cysteine proteases, comprise of highly homologous enzymes that play an important role in apoptotic cell death. Caspase-3 shows key functions in apoptosis, mediating apoptotic cascade from the intrinsic and extrinsic activation pathways. Therefore, caspase-3 is an attractive target for therapeutic intervention. For instance, inhibitors of caspase-3 have been described as promising cardioprotectants, neuroprotectants and antiarthritic agents. A novel peptidomimetic inhibitor of caspase-3, has been designed, which still has the properties of a reversible inhibitor, while the P1 site at the C-terminal remains, and only L-amino acid has been replaced by D-amino acid. Also presented here is the synthesis of the inhibitor and its inhibitory activity against caspase-3, which was tested by the fluorescent activity assay.

关键词： Caspase-3 Inhibitor Retro-inverso Peptidomimetie Synthesis

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Transient Current Behaviour for Iron in 3.5%NaCl and 3.5%NaCl+ 1%NaNO_2 Solutions during Corrosion Fatigue

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Journal of Materials Science & Technology 1996年第4期12卷 291-298页

作者： Zhengfu WANG Xuejun wei jin li and wei KE(State Key Lab. for Corrosion and Protection, Institute of Corrosion and Protection of Metals,Chinese Academy of Sciences, Shenyang 110015, China) State Key Lab. for Corrosion and Protection Institute of Corrosion and Protection of Metals Chinese Academy of Sciences Shenyang 110015 China

The transient current behaviour for Iron in 3.5%NaCl and 3.5%NaCl +1%NaNO2 solutions during corrosion fatigue (CF) process has been investigated at different given strain amplitudes and strain rates. The results show that elastic strain has little contribution to material dissolution. The elastic tension strain results in the decrease in the transient current, while the elastic compression strain increases the transient current. Compared to the elastic deformation, plastic deformation affects material dissolution evidently For iron in 3.5%NaCl solution, the strain amplitude plays a dominant role in the dissolution process accelerated by the plastic strain, while in 3.5%NaCl+1%NaNO2 solution, both the strain amplitude and strain rate play an important role in this process. In this paper, the effect of the elastic deformation on the material dissolution and the relation between the tension and compression current peak values under the plastic cycle deformation are discussed

关键词： Transient Current Behaviour for Iron in 3.5%NaCl and 3.5%NaCl SCE NaNO2 Solutions during Corrosion Fatigue

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Local multifractal detrended fluctuation analysis for tea breeds identification

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International Journal of Biomathematics 2014年第5期7卷 27-40页

作者： Fang Wang Rui-Biao Zou Gui-Ping liao jin-wei li Zi-Qiang liu College of Science Hunan Agricultural University Changsha 410128 P. R. China Agricultural Information Institute Hunan Agricultural University Changsha 410128 P. R. China

In recent years, the popular multifractal detrended fluctuation analysis （MF-DFA） is extended to two-dimensional （2D） version, which has been applied in some field of image processing. In this paper, based on the 2D MF-DFA, a novel multifractal estimation method for images, which we called the local multifractal detrended fluctuation analysis （LMF-DFA）, is proposed to recognize and distinguish 20 types of tea breeds. A set of new multifractal descriptors, namely the local multifractal fluctuation exponents is defined to portray the local scaling properties of a surface. After collecting 10 tea leaves for each breed and photographing them to standard images, the LMF-DFA method is used to extract characteristic parameters for the images. Our analysis finds that there are significant differences among the different tea breeds＇ characteristic parameters by analysis of variance. Both the proposed LMF-DFA exponents and another classic parameter, namely the exponent based on capacity measure method have been used as features to distinguish the 20 tea breeds. The comparison results illustrate that the LMF-DFA estimation can differentiate the tea breeds more effectively and provide more satisfactory accuracy.

关键词： Tea breeds local multifractal detrended fluctuation support vector machineand kernel method K-fold cross-validation.

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Comprehensive multimodal management of borderline resectable pancreatic cancer:Current status and progress

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World Journal of Gastrointestinal Surgery 2023年第2期15卷 142-162页

作者： Hong-Yu Wu jin-wei li jin-Zheng li Qi-Long Zhai jing-Yuan Ye Si-Yuan Zheng Kun Fang Department of Hepatobiliary Surgery The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China Department of Neurosurgery The Fourth Affiliated Hospital of Guangxi Medical UniversityLiuzhou 545000Guangxi ProvinceChina Department of Surgery Yinchuan Maternal and Child Health HospitalYinchuan 750000NingxiaChina

Borderline resectable pancreatic cancer(BRPC)is a complex clinical entity with specific biological *** for resectability need to be assessed in combination with tumor anatomy and *** therapy(NAT)for BRPC patients is associated with additional survival *** is currently focused on exploring the optimal NAT regimen and more reliable ways of assessing response to *** attention to management standards during NAT,including biliary drainage and nutritional support,is *** remains the cornerstone of BRPC treatment and multidisciplinary teams can help to evaluate whether patients are suitable for surgery and provide individualized management during the perioperative period,including NAT responsiveness and the selection of surgical timing.

关键词： Borderline resectable pancreatic cancer Neoadjuvant therapy Resectability Surgery Multimodality treatment Multidisciplinary teams

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A novel absorptive thin film for laser welding in optoelectronic device capsulation

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光学精密工程 2005年第4期13卷 492-499页

作者： JIANG Shao-ji jin Tao li wei-duo WANG He-zhou State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University Guangzhou 510275 China

A kind of absorptive thin film was designed and used in laser welding of SiO2, Si and liNbO3. This absorptive thin film of three-layer metal-dielectric-metal structure is designed for further reducing the high reflectance of the Nd:YAG laser beam on the surface of the tin layer that is utilized as solder between the transparent parent materials. The actual absorption of laser energy in experiment exceeds 99%. This combination of absorber and solder transformed the laser energy into heat efficiently and decreased the minimum necessary incident laser power transmitting through the transparent parent materials. As a result, the damage of the parent materials, which is suffered from laser transmission, was avoided; On the other hand, mechanical stability of the welded materials had been improved. Experiment had been made to show the difference between welding with and without the absorptive thin film.

关键词：光电子装置封装工艺薄膜激光仪器激光技术

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Analysis of the vortices in the inner flow of reversible pump turbine with the new omega vortex identification method

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Journal of Hydrodynamics 2018年第3期30卷 463-469页

作者： Yu-ning Zhang Kai-hua liu jin-wei li Hai-zhen Xian Xiao-ze Du Key Laboratory of Fluid and Power Machinery Ministry of EducationXihua UniversityChengdu 610039China Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(Ministry of Education) North China Electric Power UniversityBeijing 102206China Beijing South-to-North Water Diversion Tuancheng Lake Management Office Beijing 100195China China Institute of Water Resources and Hydropower Research Beijing 100048China

Reversible pump turbines are widely employed in the pumped hydro energy storage power plants. The frequent shifts among various operational modes for the reversible pump turbines pose various instability problems, e.g., the strong pressure fluctuation, the shaft swing, and the impeller damage. The instability is related to the vortices generated in the channels of the reversible pump turbines in the generating mode. In the present paper, a new omega vortex identification method is applied to the vortex analysis of the reversible pump turbines. The main advantage of the adopted algorithm is that it is physically independent of the selected values for the vortex identification in different working modes. Both weak and strong vortices can be identified by setting the same omega value in the whole passage of the reversible pump turbine. Five typical modes（turbine mode, runaway mode, turbine brake mode, zero-flow-rate mode and reverse pump mode） at several typical guide vane openings are selected for the analysis and comparisons. The differences between various modes and different guide vane openings are compared both qualitatively in terms of the vortex distributions and quantitatively in terms of the areas of the vortices in the reversible pump turbines. Our findings indicate that the new omega method could be successfully applied to the vortex identification in the reversible pump turbines.

关键词： Reversible pump turbine vorticity vortex identification omega method

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Low-Pressure Metamorphism of Granulite Facies in an Early Proterozoic Orogenic Event in Central Inner Mongolia

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Acta Geologica Sinica(English Edition) 1993年第1期67卷 63-77页

作者： liu Xishan, jin wei and li Shuxun Changchun University of Earth Sciences, Changchun, Jilin Sun Sheping Changchun University of Earth Sciences Changchun Jilin

According to the kinds of feldspar and rock associations in the Ai-rich gneisses, the low-pressure metamorphic crust of the Early Proterozoic granulite facies in central Inner Mongolia can be divided into southern and northern belts which are composed of six rock associations. They represent the relevant rock sequences of the layered metamorphic rock series formed under specific metamorphic temperature and pressure conditions as well as tectonic environments. Mineral inclusions and reaction texture have recorded that the medium-temperature high-pressure mineral assemblages are replaced by the high-temperature low-pressure mineral assemblages, thus, giving rise to: garnet+quartz→ hypersthene+plagioclase; kyanite→sillimanite and garnet+kyanite/sillimanite+quartz→cordierite. The deformation fabrics of the rocks, the change of mineral assemblages and the PTt path of metamorphism indicate that the contempranceous high-temperature normal-slip ductile shearing is the main cause of the formation of the low-pressure metamorphic crust of granulite facies. In the orogenic event, the co-action of thrusting and extension resulted in the change of a medium-temperature high-pressure metamorphic environment into the high-temperature low-pressure metamorphic conditions.

关键词： Early Proterozoic change of mineral assemblages thrusting extension orogenic event.

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Evaluation of germ-cell kinetics in infertile patients with proliferating cell nuclear antigen proliferating index

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Asian Journal of Andrology 2001年第1期3卷 63-66页

作者： li ZENG, Xiang-Tian KONG, jin-wei SU, Tong-li XIA Yan-Qun NA Ying-Lu GUO Institute of Urology,Peking University, Beijing 100034, China Institute of Urology Peking University Beijing Chin

Aim: To explore the usefulness of proliferating cell nuclear antigen proliferating index (PCNA PI) in the pathologicaldiagnosis and treatment of male infertility. Methods: Testicular biopsy specimen obtained from 48 cases of male in-fertility and 2 normal controls were fixed and embedded. The sections were stained with anti-PCNA monoclonal anti-bodies or haematoxylin/eosin. Proliferating index (PI), expressed as the percentage of germ-cell nuclei positivelystained with PCNA antibody, was assessed from more than 20 seminiferous tubules or 600 germ-cells. Results: Theinfertile patients were divided into 4 groups: Group 1, normal spermatogenesis (14 cases); Group 2, hypospermato-genesis (16 cases); Group 3, germinal arrest (10 cases); Group 4, Sertoli cell only syndrome (8 cases). The PCNAPI of normal control testis was 86.5 % (mean value). Group 3 had a significantly lower PCNA PI (29.8 %) than nor-mal testis; Group 1 and 2 had similar Pis (82.3% and 82.3%, respectively) as the control testis. PI of the negativecontrol (Group 4) was 0 as no germ-cells were found. Conclusion: PCNA PI is useful for assessing germ-cell ki-netics, especially for pathological diagnosis of germinal arrest which is difficult to differentiate by routine HE stainingtechnique. In germinal arrest, there is a significantly lowered PCNA PI, which is an indication of DNA synthesis dete-rioration, suggesting the use of therapies be different from those for hypospermatogenesis. (Asian J Androl 2001 Mar;3: 63-66)

关键词： male infertility testis kinetics proliferating cell nuclear antigen

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Electrochemical behavior of C-(60) modified electrode in aqueous solutions

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Chinese Journal of Chemistry 1994年第2期12卷 117-122页

作者： SHI, Zhan-ling MAO, Yi-Ping TONG, wei jin, li-TongDepartment of chemistry, East China Normal University, 3663 Zhong Shan Road (N), Shanghai 200062,China Department of chemistry East China Normal University 3663 Zhong Shan Road (N) Shanghai 200062 China

The construction of adsorptive type C60 modified electrode and its electrochemical reduction and oxidation behavior in aqueous solutions are described in this report. Four pairs of one-electron transfer reduction and oxidation cyclic voltammetry is obtained in aqueous solution containing 30% CH3CN and 2% (C2H5)4NOH. It is reported in this paper that the C60 modified electrode also catalyzes the electrochemical reduction of dissolved oxygen in 40% DMF and 2% (C2H5)4NOH aqueous solution and this might open a new field for the potential applications of C60 in electrochemistry and electroaualytical chemistry.

关键词： C60 modified electrode electrochemistry.

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