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THEORY AND METHOD FOR WETLAND BOUNDARY DELINEATION

Chinese Geographical Science 2006年第1期16卷 56-62页

作者： YIN Shu-bai lu xian-guo Northeast Institute of Geography and Agroeeology Chinese Aeademy of Seiences Changchun 130012 P. R. China Graduate School of Chinese Academy of Sciences Beijing 100049 P. R. China

Based on the analysis of the subjectivity of wetland boundary criteria and their causes at present, this paper suggested that, under the condition that the mechanism of wetland formation process has not been understood, "black box" method of System Theory can be used to delineate wetland boundaries scientifically. After analyzing the difference of system construction among aquatic habitats, wetlands and uplands, the lower limit of rooted plants was chosen as the lower boundary criterion of wetlands. Because soil diagnostic horizon is the result of the long-term interaction among all environments, and it is less responsive than vegetation to short-term change, soil diagnostic horizon was chosen as the indicator to delineate wetland upper boundary, which lies at the thinning-out point of soil diagnostic horizon. Case study indicated that it was feasible using the lower limit of rooted plants and the thinning-out point of soil diagnostic horizon as criteria to delineate the lower and upper boundaries of wetland. In the study area, the thinning-out line of albic horizon was coincident with the 55.74m contour line, the maximum horizon error was less than 1m, and the maximum vertical error less than 0.04m. The problem on wetland definition always arises on the boundaries. Having delineated wetland boundaries, wetlands can be defined as follows: wetlands are the transitional zones between uplands and deepwater habitats, they are a kind of azonal complex that are inundated or saturated by surface or ground water, with the lower boundary lying at the lower limit of rooted plants, and the upper boundary at the thinning-out line of upland soil diagnostic horizon.

关键词： wetland boundary "black box" method soil diagnostic horizon thinning-out point (line) wetland definition

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Application of vetiver grass Vetiveria zizanioides: Poaceae(L.) as a trap plant for rice stem borer Chilo suppressalis: Crambidae(Walker) in the paddy fields

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Journal of Integrative Agriculture 2019年第4期18卷 797-804页

作者： lu Yan-hui ZHENG Xu-song lu Zhong-xian State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control Institute of Plant Protection and Microbiology Zhejiang Academy of Agricultural Sciences

Rice is an important staple food in China and it is at risk of attack by rice striped stem borer Chilo suppressalis, which occurs in most rice growing areas. In recent years, severe C. suppressalis outbreaks have been observed in China mainly due to changes in the rice cultivation systems, wide adoption of hybrid varieties and resistance to the dominant insecticides. Management relies primarily on chemical insecticides and resistance is an important contributing factor in these outbreaks. As a result, food safety of agricultural produce is reduced and the ecological and environmental integrities are threatened as well. Recently, environmentally friendly pest management measures, such as trap plants have been introduced for C. suppressalis management and this method can greatly reduce insecticide use. Our previous results indicated that the vetiver grass(Vetiveria zizanioides) is a dead-end trap plant that can effectively attract the adult females of C. suppressalis to lay eggs on it but where larvae are unable to complete their life cycle. This paper further explored the application of vetiver grass as a trap plant to manage C. suppressalis in the paddy fields. This environment-friendly tool can not only reduce C. suppressalis populations, it can also increase the diversity and abundance of natural enemies that can provide better environmental conditions for rice production.

关键词： rice vetiver trap plants Chilo suppressalis control application

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Lower bound of local quantum uncertainty for high-dimensional bipartite quantum systems

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Science China(Physics,Mechanics & Astronomy) 2019年第9期62卷 34-40页

作者： ShuHao Wang Hui Li xian lu Bin Chen State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China School of Science Tianjin University of TechnologyTianjin 300191China Institute of Software Chinese Academy of SciencesBeijing 100080China

Quantum correlations are of fundamental importance in quantum phenomena and studies related to quantum information processing. The measurement of quantum correlations is a central challenge. A recently proposed measure of quantum correlations,local quantum uncertainty(LQU), satisfies all the physical requirements as a measure of quantum correlations. This study derives a closed-form lower bound of the LQU for arbitrary-dimensional bipartite quantum states using operator relaxation. We also compared the lower bound with the optimized LQU for several typical sets of quantum states. The results show that the lower bound is near to the optimized LQU for three-dimensional bipartite quantum systems.

关键词： quantum correlations local quantum uncertainty bipartite quantum systems

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Effectiveness of magnetic resonance imaging and spiral computed tomography in the staging and treatment prognosis of colorectal cancer

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2135-2144页

作者： lu-Na Bai lu-xian Zhang Department of Radiology Zhongshan Hospital Xiamen UniversityXiamen 361004Fujian ProvinceChina

BACKGROUND Colorectal cancer(CRC)is a prevalent cancer type in clinical settings;its early signs can be difficult to detect,which often results in late-stage diagnoses in many *** early detection and diagnosis of CRC are crucial for improving treatment success and patient survival ***,imaging techniques have been hypothesized to be essential in managing CRC,with magnetic resonance imaging(MRI)and spiral computed tomography(SCT)playing a significant role in enhancing diagnostic and treatment *** To explore the effectiveness of MRI and SCT in the preoperative staging of CRC and the prognosis of laparoscopic *** Ninety-five individuals admitted to Zhongshan Hospital Xiamen University underwent MRI and SCT and were diagnosed with *** precision of MRI and SCT for the presurgical classification of CRC was assessed,and pathological staging was used as a *** operating characteristic curves were used to evaluate the diagnostic efficacy of blood volume,blood flow,time to peak,permeability surface,blood reflux constant,volume transfer constant,and extracellular extravascular space volume fraction on the prognosis of patients with *** Pathological biopsies confirmed the following CRC stages:23,23,32,and 17 at T1,T2,T3,and T4,*** were 39 cases at the N0 stage,22 at N1,34 at N2,44 at M0 stage,and 51 at *** pathological findings as the benchmark,the combined use of MRI and SCT for preoperative TNM staging in patients with CRC demonstrated superior sensitivity,specificity,and accuracy compared with either modality alone,with a statistically significant difference in accuracy(Plues for laparoscopic treatment prognosis,as indicated by the areas under the curve for blood volume,blood flow,time to peak,and permeability surface,blood reflux constant,volume transfer constant,and extracellular extravascular space volu

关键词： Magnetic resonance imaging Spiral computed tomography Colorectal cancer Prognosis Receiver operating characteristic curve Retrospective study

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Electronic Structure, Lattice Dynamics and Thermoelectric Properties of PbTe from First-Principles Calculation

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Chinese Physics Letters 2013年第1期30卷 145-149页

作者： lu Peng-xian QU Ling-Bo College of Materials Science and Engineering Henan University of TechnologyZhengzhou 450001 Department of Chemistry Zhengzhou UniversityZhengzhou 450001

The electronic structure and the lattice dynamics of lead telluride(PbTe)are investigated by using the density functional *** thermoelectric properties are then calculated using the semi-classical Boltzmann ***,the relationships among the thermoelectric properties,the electronic structure and the lattice dynamics are also *** strategies aiming at optimizing the thermoelectric properties are *** related theoretical calculations therefore give a valuable insight on how to further enhance the thermoelectric properties of PbTe.

关键词： PbTe Lattice electronic

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CUMULATIVE EFFECTS OF DIFFERENT CULTIVATING PATTERNS ON PROPERTIES OF ALBIC SOIL IN SANJIANG PLAIN

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Chinese Geographical Science 2006年第2期16卷 133-140页

作者： YUAN Zhao-hua lu xian-guo ZHOU Jia Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changrhun 130012 P. R. China College of Resources and Environmental Sciences Northeast Agricultural University Harbin 150030 P. R. China Graduate School of Chinese Academy of Sciences Beijing 100049 P. R. China College of Life and Environment Science Harbin Normal University Harbin 150025 P. R. China

This paper studied the cumulative effects of different cultivating patterns on the properties of albic soils in the Sanjiang Plain using correlation analysis. The results showed that the physical and chemical properties of the albic soil changed greatly when it was cultivated as farmland. As for physical properties of the soil, bulk density and specific gravity increased gradually, the porosity and field capacity decreased gradually year by year, but they increased after being abandoned. As for chemical properties, pH increased, organic matter and other nutrients decreased with increasing of the cultivating years. For the albic soil cultivated with forage, the cumulative effects were apparently strengthened with the increase of cultivating years, especially for the bulk density, total porosity, capillary porosity and capillary moisture capacity. Moreover, fertilization also had great effects on the albic soil. Applying magnetism ferti- lizer improved the physical properties such as bulk density, soil moisture and porosity, raised the utilization rate of nitrogen and phosphorus fertilizer. Compared with nutrient fertilizer, utilization of the magnetism fertilizer made production increase by 5.9%-13.9%. At the same time, using organic material and loosing the albic layer could improve not only the physical, chemical and biological properties of the cultivating layer, but also the ill properties of the albic layer, thus making organic carbon and heavy fraction carbon contents increase, and biological activity increase obviously.

关键词： cultivating pattern albic soil soil property Sanjiang Plain

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Flow Injection Chemiluminescence Determination of Puerarin in Pharmaceutical Preparations Using Eosin Y-Fenton System

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Chinese Journal of Chemistry 2011年第6期29卷 1261-1267页

作者： Cai, Zhuo Zhang, xian lu, Dengfeng Gan, Jingni College of Chemistry and Chemical Engineering Guangxi University Nanning Guangxi 530004 China

A novel chemiluminescence （CL） system was established for the determination of puerarin in pharmaceutical preparations. It was shown that a strong CL signal was observed when Eosin Y reacted with the hydroxyl radicals which were generated from Fenton reagent in acidic medium. The CL intensity was decreased significantly when puerarin was added to the reaction system and partially scavenged the hydroxyl radicals in the solution. The extent of decrease in the CL intensity had a good stoichiometrical relationship with puerarin concentration. Based on this, a new method for the determination of puerarin using a flow injection chemiluminescence technique was developed. The experimental parameters that affected the CL intensity were optimized. Under the optimal conditions, the linear range for puerarin concentration was 8.0 × 10^-8--2.0 × 10^-6 mol/L （R = 0.9982） with a detection limit of 7.5 × 10^-9 mol/L （S/N= 3） and the relative standard deviation was method was applied to the determination of puerarin in a 1.7% for 4.0× 10^-7 mol/L puerarin （n= 11）. The proposed puerarin injection with satisfactory results.

关键词： flow injection chemiluminescence Eosin Y puerarin hydroxyl radical

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Application of contrast-enhanced intraoperative ultrasonography in the decision-making about hepatocellular carcinoma operation

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World Journal of Gastroenterology 2010年第4期16卷 508-512页

作者： Wu, Hong lu, Qiang luo, Yan He, xian-lu Zeng, Yong Sichuan Univ W China Hosp Dept Hepatobiliary Pancreat Surg Chengdu 610041 Sichuan Prov Peoples R China Sichuan Univ W China Hosp Dept Sonog Chengdu 610041 Sichuan Prov Peoples R China

AIM:To evaluate the detection and differentiation ability of contrast-enhanced intraoperative ultrasonography(CE-IOUS) in hepatocellular carcinoma(HCC) ***:Clinical data of 50 HCC patients were retrospective *** sensitivity,specificity,false negative and false positive rates of contrast enhanced magnetic resonance imaging(CE-MRI),IOUS and CEIOUS were calculated and *** strategy changes due to CE-IOUS were ***:Lesions detected by CE-MRI,IOUS and CEIOUS were 60,97 and 85 *** sensitivity,specificity,false negative rate,false positive rate of CEMRI were 98.2%,98.6%,98.6%,60.0%,respectively;for IOUS were 50.0%,90.9%,1.8%,1.4%,respectively;and for CE-IOUS were 1.4%,40.0%,50.0%,9.1%,*** operation strategy of 9(9/50,18.0%) cases was changed according to the results of ***:Compared with CE-MRI,CE-IOUS performs better in detection and differentiation of small metastasis and regenerative *** plays an important role in the decision-making of HCC operation.

关键词： Hepatocellular carcinoma Liver resection Contrast enhanced magnetic resonance imaging Intraoperative ultrasonography Contrast-enhanced intraoperative ultrasonography

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A Novel Method for Synthesis of 2,3,4-Trisubstituted Furans

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Chinese Chemical Letters 2006年第11期17卷 1421-1422页

作者： lu Bin XU Fang Rui ZHONG lu Ling WU xian HUANG Department of Chemistry Zhejiang University （Xixi Campus） Hangzhou 310028

Intermolecular addition-cyclization of 1, 3-dicarbonyl compounds with arylbromo- allenes in K2CO3 mediated condition afforded 2, 3, 4-trisubstituted furans in good yield.

关键词： Bromoallene polysubstituted furans allyl dication equivalent.

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Ceric(Ⅳ)-mediated Oxidative Addition of 1,3-Dicarbonyl Compounds to MCPs:A Facile Access to Dihydrofuran Derivatives Incorporating Cyclopropyl Groups

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Chinese Chemical Letters 2006年第5期17卷 569-570页

作者： Wan Li CHEN lu Ling WU xian HUANG Department of Chemistry Zhejiang University （Xixi Campus） Hangzhou 310028

Alkylidenecyclopropanes undergo ceric（Ⅳ） ammonium nitrate （CAN）-mediated addition reaction with 1,3-dicarbonyl compounds leading to dihydrofuran derivatives incorporating cyclopropyl groups in moderate yields.

关键词： Alkylidenecyclopropane ceric(Ⅳ) ammonium nitrate (CAN) dihydrofuran derivatives.

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