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Systematic Review of Community Type 2 Diabetes Structured Health Education (CT2DSHE)
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作者 Gift Phiri 《Open Journal of Nursing》 2024年第8期377-400,共24页
Aim: This paper aims to evaluate disparities of type 2 diabetes structured health education programmes that is utilised within the communities. Design: systematic review, (a type of secondary research design) aiming t... Aim: This paper aims to evaluate disparities of type 2 diabetes structured health education programmes that is utilised within the communities. Design: systematic review, (a type of secondary research design) aiming to summarize the results of prior primary research studies on available evidence Community type 2 diabetes structured education (CT2DSHE). Methods: Research question: Type 2 diabetic structured health education within a community how effective is it? Qualitative Systematic review, defined as a way to get reliable and objective picture of current available evidence on the specific topic—(CT2DSHE), (Denscombe, 2021) through reflexivity synthesis of available data as an example. This is valuable in time constraints such as project assignments that must be met within specific time and also to bring together available evidence together [1]. Results: This review has shown that CT2DSHE is effective with seven out of the eleven authors supporting, three authors against and one was neutral, further showed that knowledge and skills acquired can last longer with patient activation improved among T2DM patients ideal for sustaining their self-management of T2DM. Conclusion: This research provides suggestive answers to the research question: “Type 2 diabetic structured health education within a community how effective is it?”, This has demonstrated CT2DSHE effectiveness in knowledge acquisition and improving T2DM awareness among T2DM patients, whilst evidencing long effects beyond the study times of 3 - 9 months period in relation to patient activation. Also Identified diabetes education self-management on newly diagnosed (DESMOND) patient as CT2DSHE program for recommendation. Patient or Public Contribution: This work aspires to contribute to CT2DSHE in these areas;Influencing policy decision-making for community diabetes care within the UK and world at large., Contributing to already vast knowledge on diabetes self-management and reasons why?, Influencing educators on how CT2DSHEP are designed, delivered by putting the patient at the Centre and bringing different perspectives on CT2DSHEP in one place that is serving users time of having to consult several resources especially busy clinicians [2] [3]. 展开更多
关键词 Community Health EDUCATION EFFECTIVENESS Impact structured and Planned type 2 Diabetes (T2DM)
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Microstructure of 18R-type long period ordered structure phase in Mg_(97)Y_2Zn_1 alloy 被引量:7
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作者 唐平英 吴萌萌 +3 位作者 唐壁玉 王继伟 彭立明 丁文江 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第4期801-806,共6页
The microstructure of the 18R-type long period stacking ordered (LPSO) phase in Mg 97 Y 2 Zn 1 alloy was investigated by the first principles calculation. The arrangement rule of Zn and Y atoms in the LPSO structure... The microstructure of the 18R-type long period stacking ordered (LPSO) phase in Mg 97 Y 2 Zn 1 alloy was investigated by the first principles calculation. The arrangement rule of Zn and Y atoms in the LPSO structure is determined theoretically. The calculation results reveal that the additive atoms are firstly located in the fault layers at the two ends of the 18R-type LPSO structure, and then extend to fault layers in the interior, which is in good agreement with the experimental observations. This feature also implies the microstructural relationship between 18R and other LPSO structures. The cohesive energy and the formation heat indicate the dependence of the stability of 18R LPSO structure on contents of Y and Zn atoms. The calculated electronic structures reveal the underlying mechanism of microstructure and the stability of 18R LPSO structure. 展开更多
关键词 Mg 97 y 2 Zn 1 alloy 18R LPSO structure the first principles MICROstructure electronic structure
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Synthesis and structures of cdq‑topological quaternary and(4,4,8)‑c topological quinary Zn‑MOFs with both oxalic acid and triazole ligands
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作者 LIANG Jing WANG Qian BAI Junfeng 《无机化学学报》 SCIE CAS CSCD 北大核心 2024年第11期2186-2192,共7页
Different solvothermal reactions of ZnC2O_(4)with oxalic acid(H_(2)ox)and 1,2,4-triazole(Htrz)successfully gave a new quaternary(NJTU-Bai83,NJTU-Bai=Nanjing Tech University Bai's group)and a new quinary(NJTU-Bai84... Different solvothermal reactions of ZnC2O_(4)with oxalic acid(H_(2)ox)and 1,2,4-triazole(Htrz)successfully gave a new quaternary(NJTU-Bai83,NJTU-Bai=Nanjing Tech University Bai's group)and a new quinary(NJTU-Bai84)anionic metal-organic frameworks(MOFs),where NJTU-Bai83=(Me_(2)NH_(2))2[Zn_(3)(trz)_(2)(ox)_(3)]·2H_(2)O and NJTU-Bai84=(Me_(2)NH_(2))[Zn_(3)(trz)_(3)(ox)_(2)]·H_(2)O,respectively.With the[Zn_(2)(ox)4(trz)_(2)]secondary building unit(SBU)in NJTU-Bai83 replaced by the[Zn_(3)(ox)_(2)(trz)_(6)]and planar[Zn(ox)_(2)(trz)_(2)]ones in NJTU-Bai84,2D supramolecular building layers(SBLs)are changed from the A-layer and B-layer to another A-layer,while pillars are transformed from the tetrahedral[Zn(ox)_(2)(trz)_(2)]SBU to the irregular tetrahedral[Zn(ox)_(2)(trz)_(2)]and planar[Zn(ox)_(2)(trz)_(2)]SBUs.Thus,cdq-topological quaternary NJTU-Bai83 is tuned to(4,4,8)-c new topological quinary NJTU-Bai84.Two MOFs were well characterized by powder X-ray diffraction,thermogravimetric analysis,elemental analysis,etc.CCDC:2351819,NJTU-Bai83;2351820,NJTU-Bai84. 展开更多
关键词 controlled synthesis multivariant metal-organic frameworks pillar-layer typed structures
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Type Synthesis of 1T2R Parallel Mechanisms Using Structure Coupling-Reducing Method 被引量:11
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作者 Haitao Liu Ke Xu +2 位作者 Huiping Shen Xianlei Shan Tingli Yang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2019年第5期70-79,共10页
Direct kinematics with analytic solutions is critical to the real-time control of parallel mechanisms.Therefore,the type synthesis of a mechanism having explicit form of forward kinematics has become a topic of intere... Direct kinematics with analytic solutions is critical to the real-time control of parallel mechanisms.Therefore,the type synthesis of a mechanism having explicit form of forward kinematics has become a topic of interest.Based on this purpose,this paper deals with the type synthesis of 1T2R parallel mechanisms by investigating the topological structure coupling-reducing of the 3UPS&UP parallel mechanism.With the aid of the theory of mechanism topology,the analysis of the topological characteristics of the 3UPS&UP parallel mechanism is presented,which shows that there are highly coupled motions and constraints amongst the limbs of the mechanism.Three methods for structure coupling-reducing of the 3UPS&UP parallel mechanism are proposed,resulting in eight new types of 1T2R parallel mechanisms with one or zero coupling degree.One obtained parallel mechanism is taken as an example to demonstrate that a mechanism with zero coupling degree has an explicit form for forward kinematics.The process of type synthesis is in the order of permutation and combination;therefore,there are no omissions.This method is also appli cable to other configurations,and novel topological structures having simple forward kinematics can be obtained from an original mechanism via this method. 展开更多
关键词 type synthesis structure coupling-reducing Coupling degree Parallel mechanism
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Effect of Different Vegetation Types on the Rhizosphere Soil Microbial Community Structure in the Loess Plateau of China 被引量:14
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作者 ZHANG Chao LIU Guo-bin +1 位作者 XUE Sha XIAO Lie 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2013年第11期2103-2113,共11页
The Loess Plateau in China is one of the most eroded areas in the world. Accordingly, vegetation restoration has been implemented in this area over the past two decades to remedy the soil degradation problem. Understa... The Loess Plateau in China is one of the most eroded areas in the world. Accordingly, vegetation restoration has been implemented in this area over the past two decades to remedy the soil degradation problem. Understanding the microbial community structure is essential for the sustainability of ecosystems and for the reclamation of degraded arable land. This study aimed to determine the effect of different vegetation types on microbial processes and community structure in rhizosphere soils in the Loess Plateau. The six vegetation types were as follows:two natural grassland (Artemisia capillaries and Heteropappus altaicus), two artificial grassland (Astragalus adsurgens and Panicum virgatum), and two artificial shrubland (Caragana korshinskii and Hippophae rhamnoides) species. The microbial community structure and functional diversity were examined by analyzing the phospholipid fatty acids (PLFAs) and community-level physiological profiles. The results showed that rhizosphere soil sampled from the H. altaicus and A. capillaries plots had the highest values of microbial biomass C, average well color development of carbon resources, Gram-negative (G-) bacterial PLFA, bacterial PLFA, total PLFA, Shannon richness, and Shannon evenness, as well as the lowest metabolic quotient. Soil sampled from the H. rhamnoides plots had the highest metabolic quotient and Gram-positive (G+) bacterial PLFA, and soil sampled from the A. adsurgens and A. capillaries plots had the highest fungal PLFA and fungal:bacterial PLFA ratio. Correlation analysis indicated a signiifcant positive relationship among the microbial biomass C, G- bacterial PLFA, bacterial PLFA, and total PLFA. In conclusion, plant species under arid climatic conditions signiifcantly affected the microbial community structure in rhizosphere soil. Among the studied plants, natural grassland species generated the most favorable microbial conditions. 展开更多
关键词 soil microbial biomass microbial community structure PLFA community-level physiological profiles vegetation types
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Effects of rapid quenching on structure and cycle stability of La-Mg-Ni-Co type hydrogen storage alloy 被引量:4
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作者 DONG Xiaoping Lü Fanxiu ZHANG Yanghuan YANG Liying FENG Meng WANG Xinlin 《Rare Metals》 SCIE EI CAS CSCD 2006年第z1期207-212,共6页
In order to improve the cycle stability of La-Mg-Ni-Co type alloy electrode, rapid quenching technology was employed. The effects of rapid quenching on the microstructure and cycle stability of the alloy were investig... In order to improve the cycle stability of La-Mg-Ni-Co type alloy electrode, rapid quenching technology was employed. The effects of rapid quenching on the microstructure and cycle stability of the alloy were investigated. The obtained results show that the La2Mg(Ni0.85Co0.15)9M0.1 (M=B, Cr) alloy electrodes are composed of (La, Mg)Ni3 phase, LaNi5 phase and a small amount of the LaNi2 phase. A trace of the Ni2B phase exists in the as-cast MB alloy, and the Ni2B phase in the alloy nearly disappears after rapid quenching. Rapid quenching technology can slightly improve the cycling life of the alloy. When the quenching rate increases from 0 m·s-1 (As-cast is defined as quenching rate of 0 m·s-1) to 30 m·s-1, the cycle lives of the MB, MCr alloys enhance from 86 and 87 cycles to 106 and 119 cycles, respectively. On the other hand, the average capacity decay rates of the MB, MCr alloys decrease from 1.7172 and 1.7178 mAh·g-1·cycle-1 to 1.5751 and 1.3060 mAh·g-1·cycle-1 after 86 charge-discharges cycling, respectively. 展开更多
关键词 rapid quenching La-Mg-Ni-Co type hydrogen storage alloy structure characteristics cycle stability
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Tree species diversity and stand structure along major community types in lowland primary and secondary moist deciduous forests in Tripura,Northeast India 被引量:4
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作者 Koushik Majumdar Uma Shankar Badal Kumar Datta 《Journal of Forestry Research》 CAS CSCD 2012年第4期553-568,共16页
Tree species diversity and population structure at different community types were described and analyzed for primary and secondary lowland moist deciduous forests in Tripura. Overall 10,957 individual trees belonging ... Tree species diversity and population structure at different community types were described and analyzed for primary and secondary lowland moist deciduous forests in Tripura. Overall 10,957 individual trees belonging to 46 family, 103 genera and 144 species were counted at ≥30 cm DBH (diameter at breast height) using 28 permanent belt transects with a size of 1 ha (10 m × 1000 m). Four different tree communities were identified. The primary forests was dominated by Shorea robusta (mean density 464.77 trees.ha^-1, 105 species) and Schima wallichii (336.25 trees.ha^-1, 82 species), while the secondary forests was dominated by Tectona grandis (333.88 trees.ha^-1, 105 species) and Hevea brasiliensis (299.67 trees.ha^-1, 82 species). Overall mean basal area in this study was 18.01m2.ha^-1; the maximum value was recorded in primary Shorea forest (26.21 m2.ha^-1). Mean density and diversity indices were differed significantly within four different communities. No significant differences were observed in number of species, genera, family and tree basal cover area. Significant relationships were found between the species richness and different tree population groups across the communities. Results revealed that species diversity and density were increased in those forests due to past disturbances which resulted in slow accumu- lation of native oligarchic small tree species. Seventeen species were recorded with 〈2 individuals of which Saraca asoka (Roxb.) de Wilde and Entada phaseoloides (L.) Men'. etc. extensively used in local ethnomedicinal formulations. The present S. robusta Gaertn dominated forest was recorded richer (105 species) than other reported studies. Moraceae was found more speciose family instead of Papilionaceae and Euphorbiaceae than other Indian moist deciduous forests. Seasonal phenological gap in such moist deciduous forests influenced the population of Trachypithecus pileatus and capped langur. The analysis of FIV suggested a slow trend of shifting the population of Lamiaceae group by Moraceae species in secondary T. grandis L. dominated community. 展开更多
关键词 diversity and stand structure moist deciduous forest species conservation tree community types
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Plant Type and Its Effects on Canopy Structure at Heading Stage in Various Ecological Areas for a Two-line Hybrid Rice Combination,Liangyoupeijiu 被引量:3
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作者 LU Chuan-gen Hu Ning +2 位作者 YAO Ke-min XIA Shi-jian QI Qing-ming 《Rice science》 SCIE 2010年第3期235-242,共8页
A two-line hybrid rice combination, Liangyoupeijiu, was used to estimate several factors of plant type, and environmental models for these factors at the heading stage were established using the data of eight ecologic... A two-line hybrid rice combination, Liangyoupeijiu, was used to estimate several factors of plant type, and environmental models for these factors at the heading stage were established using the data of eight ecological experimental sites in 2006 and 2007. According to climatic data from 1951 to 2005, the differences in those factors and their effects on plant canopy were analyzed for four rice cropping areas in China, including South China, the middle-lower reaches of the Yangtze River, Sichuan Basin, and river valley in Yunnan, China. The thickness of leaf layer (the distance from pulvinus of the third leaf from the top to the tip of flag leaf) and distribution of leaf area could be used as candidate indices for the plant type of a rice canopy. 展开更多
关键词 hybrid rice plant type MODEL ecological area canopy structure INDEX
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WJD 5^(th) Anniversary Special Issues(2): Type 2 diabetes Structured SMBG in early management of T2DM: Contributions from the St Carlos study 被引量:2
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作者 Teresa Ruiz Gracia Nuria García de la Torre Lobo +1 位作者 Alejandra Durán Rodríguez Hervada Alfonso L Calle Pascual 《World Journal of Diabetes》 SCIE CAS 2014年第4期471-481,共11页
Diabetes mellitus type 2(T2DM)is a global pandemic that will affect 300 million people in the next decade.It has been shown that early and aggressive treatment of T2DM from the onset decreases complications,and the pa... Diabetes mellitus type 2(T2DM)is a global pandemic that will affect 300 million people in the next decade.It has been shown that early and aggressive treatment of T2DM from the onset decreases complications,and the patient’s active role is necessary to achieve better glycemic control.In order to achieve glycemic control targets,an active attitude in patients is needed,and selfmonitoring of blood glucose(SMBG)plays a significant role.Nowadays,SMBG has become an important component of modern therapy for diabetes mellitus,and is even more useful if it is performed in a structured way.SMBG aids physicians and patients to achieve a specific level of glycemic control and to prevent hypoglycemia.In addition,SMBG empowers patients to achieve nutritional and physical activity goals,and helps physicians to optimize the different hypoglycemic therapies as demonstrated in the St Carlos study.This article describes the different ways of using this educational and therapeutic tool from the medical point of view as well as from the patient’s perspective. 展开更多
关键词 structureD SELF-MONITORING of blood glucose Educational Therapeutic Tool MANAGEMENT Diabetes MELLITUS type 2
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Effects of Row-Spacing on Canopy Structure and Yield in Different Plant Type Rice Cultivars 被引量:2
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作者 Zhao Hai-xin Wang Xiao-xue +2 位作者 Guo Zhen-hua Huang Xiao-qun Liu Hua-long 《Journal of Northeast Agricultural University(English Edition)》 CAS 2012年第4期11-19,共9页
Two japonica rice varieties, Longjing 20 (more tillers and curved panicle type, MCP) and Longjing 21 (few tillers and half erect panicle type, FEP), were used to study the effects of row-spacing on canopy structur... Two japonica rice varieties, Longjing 20 (more tillers and curved panicle type, MCP) and Longjing 21 (few tillers and half erect panicle type, FEP), were used to study the effects of row-spacing on canopy structure, morphological characteristics and yield. The results showed that the percentage of productive tiller reduced first, and increased afterwards as row-spacing increasing. The relationship between row spacing and the percentage of productive tiller fitted a quadratic regression. The effects of row spacing on leaf area index (LAI) at later tillering stage and the highest stem number per square meter also followed a quadratic regression relationship with increasing first and then reducing. The effects of row-spacing on primary branch were larger than the secondary branch in Longjing 20. However, the trend in Longjing 21 was opposite. The relationship between row spacing and seed setting rate of the secondary branch or panicle was negatively correlated. An extreme significant negative correlation was obtained between seed setting rate of secondary branch in Longjing 20. There was no significant positive correlation between row-spacing and yield in Longjing 20 (R2=0.68). However, the negative correlation between row-spacing and yield of Longjing 21 was extremely significant (R2=–0.96**). The canopy structure of MCP was more sensitive to row-spacing. The positive correlation between row spacing and the length of the flag leaf (R2=0.89**), the width of the flag leaf (R2=0.85*), the length of the last internode (R2=0.85*), the length of the last 2nd internode (R2=0.96**) or the length of the panicle (R2=0.91**) was significant or extremely significant in Longjing 20, but not in Longjing 21. The wider row-spacing promoted the accumulation of the dry matter of panicle, stem and leaf and the yield formation in MCP. The best row-spacing in Longjing 20 was 30 cm. For Longjing 21, the narrower row-spacing was better. The best row-spacing of it was 21 cm. These results suggested that improved the population environment of MCP or the utilization of the free space in the field of FEP could be reached either by wider row-spacing or narrow row-spacing. 展开更多
关键词 row-spacing more tillers and curved panicle type (MCP) few tillers and half erect panicle type (FEP) canopy structure morphological characteristic yIELD
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New cadmium and rare earth metal tungstates with the scheelite type structure 被引量:1
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作者 E.Tomaszewicz S.M.Kaczmarek H.Fuks 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第4期569-573,共5页
New cadmium and rare earth metal tungstates with the formula Cd0.25RE0.50 0.25WO4 (RE=Nd, Sin, Eu, Gd, D-statistical distrib- uted vacancies in cation sublattice) were synthesized by the solid-state reaction between... New cadmium and rare earth metal tungstates with the formula Cd0.25RE0.50 0.25WO4 (RE=Nd, Sin, Eu, Gd, D-statistical distrib- uted vacancies in cation sublattice) were synthesized by the solid-state reaction between CdWO4 and corresponding RE2W209. The obtained phases crystallize in the scheelite type structure. The Cd0.25RE0.5 0.25WO4 compounds were characterized by X-ray diffractometer (XRD), (DTA-TG), infrared (IR) and EPR methods. 展开更多
关键词 rare earth metal tungstates scheelite type structure XRD DTA-TG EPR
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Crystal Structure of a Cadmium(Ⅱ) Complex Containing an Amide Type Ligand 被引量:1
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作者 王元 吴伟娜 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第6期777-782,共6页
The compound [Cd(L)2(NO3)]NO3·0.5H2O (L = N-benzyl-2-(quinolin-8-yloxy)aceta- mide) 1 has been synthesized and structurally determined by single-crystal X-ray diffraction, elemental analysis, IR and UV sp... The compound [Cd(L)2(NO3)]NO3·0.5H2O (L = N-benzyl-2-(quinolin-8-yloxy)aceta- mide) 1 has been synthesized and structurally determined by single-crystal X-ray diffraction, elemental analysis, IR and UV spectroscopy. The crystal belongs to the triclinic system, space group P1 with a = 11.7175(13), b = 11.8873(13), c = 14.0958(16) A, α = 74.889(2), β= 78.228(2), γ = 78.831(2)°, V= 1835.0(4) A3, Z= 1, Dc= 1.502 Mg/m3, Mr = 1660.17,μ = 0.662 mm-1, F(000) = 846, 2(MoKa) = 0.71073 A, the final R = 0.0585 and wR = 0.0577 for all observed reflections. The results show that the Cd(II) ion with a square antiprismatic geometry is coordinated by a N206 donor set, two NO2 sets from two ligands and two O atoms from a bidendate nitrate group. In the crystal, the O-H...O and N-H...O hydrogen bonds are helpful to consolidate the three- dimensional network. 展开更多
关键词 cadmium(II) complex amide type ligand crystal structure
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Effects of Different Woodland Types on Soil Properties and Soil Nematode Community Structure 被引量:1
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作者 LIU Yudi CHENG Yanhong 《Journal of Landscape Research》 2017年第2期33-37,共5页
Upland red soil has strong acidity and low fertility, different woodland types produce varying impacts on soil properties and nematode communities. To explore the response of soil, 2 different types of woodland were s... Upland red soil has strong acidity and low fertility, different woodland types produce varying impacts on soil properties and nematode communities. To explore the response of soil, 2 different types of woodland were selected to investigate the changes of soil properties and nematode communities compared to wasteland. The results showed that the content of soil organic carbon and total nitrogen in chestnut forest soil were the highest, 16.41 g/kg and 0.46 g/kg respectively; while the highest contents of soil microbial biomass carbon, nitrogen and phosphorus appeared in wasteland soil, and basal respiration of wasteland soil was 28.36 mg CO_2/kg·d, significantly higher than that of the other 2 soils(p <0.05). The nematode abundance also reached the peak in wasteland soil. Three types of soil exhibited a completely different nematode community structure: the dominant trophic group in wasteland soil was herbivores,while omnivores/predators and bacterivores in forest from farmland and chestnut forest soil, respectively.The influence of different types of woodland on ecological indices of nematode communities was not consistent. Degradation trends of soil properties and nematode communities were presented in the 2woodland types compared with wasteland soil. These results are instructive for the local woodland planning. 展开更多
关键词 Different types of woodland Soil nematode Community structure
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Synthesis and Electronic Structure of A2B Type Halogen Atoms Substituted H3-Triarylcorroles 被引量:1
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作者 李敏智 朱卫华 +3 位作者 MACK John MKHIZE Scebi NYOKONG Tebello 梁旭 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2017年第3期367-380,共14页
Seven electron-deficient A_2 B type H_3-triarylcorroles have been synthesized and characterized. The solvent dependence of the electronic absorption and magnetic circular dichroism(MCD) spectra and a series of TD-DF... Seven electron-deficient A_2 B type H_3-triarylcorroles have been synthesized and characterized. The solvent dependence of the electronic absorption and magnetic circular dichroism(MCD) spectra and a series of TD-DFT calculations have been used to analyze trends in the electronic structures. Significant differences are observed in the optical spectra when solvents of differing polarity are used,which can be assigned to the effect of NH-tautomerism. 展开更多
关键词 A_2B type corrole solvatochromism electronic structure spectroscopy TD-DFT
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Structures and Spectroscopy Properties of One Novel Keggin Type Polyoxomolybdate Compound
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作者 GUO Bing-cui ZHOU Meng-xi +4 位作者 HUANG Mei-qing LIN Hui-yun SHI Lin HUANG Meng-meng CHEN Yi-ping 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2016年第S1期208-209,共2页
In this paper,One novel Keggin type polyoxomolybdate compounds have been hydrothermal synthesized:{[(CH3)2NH2]4(SiMo12O40)}[(CH3)2NH]·(DMF)0.5(1).The compound 1have been characterized by infrared spectrum,and the... In this paper,One novel Keggin type polyoxomolybdate compounds have been hydrothermal synthesized:{[(CH3)2NH2]4(SiMo12O40)}[(CH3)2NH]·(DMF)0.5(1).The compound 1have been characterized by infrared spectrum,and the two-dimensional infrared correlation spectroscopy. 展开更多
关键词 POLyOXOMOLyBDATE Keggin type structure 2DIR COS
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Community structure and regeneration types of Betula dahurica forest in Badaling forest center of Beijing
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作者 Zhang Yong Zheng Zhi-hua Zhang Zhi-xiang 《Forestry Studies in China》 CAS 2007年第2期152-156,共5页
Using plant community analysis methods, we analyzed the floristic characteristics, species composition, community structure, population structure, and spatial distribution patterns of a Betula dahurica forest on the ... Using plant community analysis methods, we analyzed the floristic characteristics, species composition, community structure, population structure, and spatial distribution patterns of a Betula dahurica forest on the "1238" mountain of Badaling in Beijing, China. The results show that: 1) There are 33 plant species in the B. dahurica community, including 18 woody plant species. The B. dahurica forest is a monodominant community with 75.9% dominance. 2) Based on diameter at breast height (DBH) size class distribution, the population structure of B. dahurica and Acer mono--two heliophyllous and pioneer tree species-is cascade-type, with both in an increasing stage. The population structure of Ella mandshurica and T. mongolica, two shade-tolerant tree species, is inverse-J type, and they have more young seedling individuals and regenerate more stably. They are associated species of the pioneer tree species. The population structure of Quercus mongolica, as the associated species of climax species in the community, is sporadic, and its regeneration is fluctuating and random. Fraxinus rhynchophylla is a shade-tolerant tree species which has a unibar population structure and climax characteristics of pioneer tree species. The relative frequency of young seedlings reached 0.4. 3) The dominant species B. dahurica is still in an increasing stage, and the regeneration of other species is steady or partly influences the community, putting the community in the pioneer species stage. From the population structure and distribution frequency ofF. rhynchophylla, the B. dahurica forest will approach to a climax state in the future. 展开更多
关键词 Betula dahurica forest community structure population structure regeneration type
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Dynamic responses of K-type and inverted-K-type jacket support structures for offshore wind-turbines 被引量:1
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作者 LIAO Ying-di GUO Meng-yuan +2 位作者 WANG Na HOU Li-jun CHEN Da 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第4期947-956,共10页
The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of man... The jacket structure has become more popular as the offshore wind-turbine support structure. K-type and inverted-K-type jacket support structures have superior potential due to their fewer joints and lower cost of manufacture and installation. A numerical study was presented on the dynamic responses of K-type and inverted-K-type jacket support structures subjected to different kinds of dynamic load. The results show that the inverted-K-type jacket structure has higher natural frequencies than the K-type. The wave force spectrum response shows that the maximum displacement of the K-type jacket structure is larger than that of the inverted-K-type. The time-history responses under wind and wave-current load indicate that the inverted-K-type jacket structure shows smaller displacement and stress compared with the K-type, and presents different stress concentration phenomena. The dynamic responses reveal that the inverted-K-type of jacket support structure has greater stiffness and superior mechanical properties, and thus is more applicable in the offshore area with relatively deep water. 展开更多
关键词 JACKET SUPPORT structure K-type inverted-K-type FOUNDATION dynamic RESPONSES
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AN ANALYSIS ON THE STRUCTURE TYPES AND BENEFITS OFSLOPELAND AGROFORESTRY SYSTEMS-Taking the Three Gorge Reservoir Area As An Example
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作者 Shen Yuancun Leng Shuying Zhang Yongtao(Institute of Geography, CAS, Beijing 100101 People’s Republic of China) 《Journal of Geographical Sciences》 SCIE CSCD 1995年第4期42-51,共10页
The modem term 'agroforestry system' is derived from agricultural practices. It is an organic combination of agriculture and forestry, ecology and economy, product variation and scientific management. On the b... The modem term 'agroforestry system' is derived from agricultural practices. It is an organic combination of agriculture and forestry, ecology and economy, product variation and scientific management. On the basis of analyzing the types and structure of agroforestry system in the Three Gorges Reservoir area,the paper poins out that agroforestry system can be divided into diffend structutal levds. Taking some typical cases as examples, it compares the benefits of four kinds of structures. The result illustrates that the hedge row agroforestry system on slopeland is an effective way to realize coordinate development of ecology and economy. 展开更多
关键词 The Three Gorge reservoir area yangtze River slopeland agroforesstry system structure type
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Synthesis and Characterization of Charge-transfer Complexes of Aminoethylphosphono-and Dimethylaminoethylphosphono-heteropolytungstic Acids of Keggin Type Structure
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作者 XiangKaiFU YunGONG 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第5期509-512,共4页
Two charge-transfer complexes of 2a and 2b of Keggin type were synthesized and characterized by elemental analysis, IR spectra, UV spectra, XRD, TG-DSC; and were compared with Hquin-PW12. The primary structure of the... Two charge-transfer complexes of 2a and 2b of Keggin type were synthesized and characterized by elemental analysis, IR spectra, UV spectra, XRD, TG-DSC; and were compared with Hquin-PW12. The primary structure of the heteropolyanions had not been changed after the formation of the charge transfer complexes. 展开更多
关键词 Aminoethylphosphonic acid dimethylaminoethylphosphonic acid organo-phospho-noheteropolytungstic acid charge transfer complex Keggin type structure.
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Weaning and Field Survival Responses of Propagules to Propagating Structures and Seedling Types in Sheanut Production in Tropical Africa
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作者 Julius Yeboah Ben Kwaku Branoh Banful +2 位作者 Frank Manu Amoah Bonaventure Kissinger Maalekuu Peter Yaw Boateng 《American Journal of Plant Sciences》 2014年第15期2247-2255,共9页
The Shea is an economic tree found in West and Central Africa with huge industrial uses in the confectionery, pharmaceutical and cosmetic sectors worldwide. Its rapid multiplication has been hampered by its slow growt... The Shea is an economic tree found in West and Central Africa with huge industrial uses in the confectionery, pharmaceutical and cosmetic sectors worldwide. Its rapid multiplication has been hampered by its slow growth and long gestation period. Successes in cutting propagation have been achieved (between 60% - 80%), however weaning of the rooted cuttings for establishment has been a major challenge. Two factorial experiments were carried out in a study in 2012. The objective of this study was to determine the effects of propagating structures and seedling types on the weaning and subsequent field establishment of propagules of Shea tree for plantation establishment. A randomized complete block design with three replications was used. Survival of the rooted cuttings in the mist propagator was very high (93.3%) and comparable to that of the seedlings (100%). The rooted cuttings in mist propagator produced the highest number of leaves, 11 times greater than the least number of leaves produced by seedlings in the lath house. Comparing the seedling types, the rooted cuttings produced significantly greater number of leaves, 4.8 times than the normal seedlings. Rooted cuttings in the mist propagator produced the biggest stem girth significantly greater than the seedlings kept in all the structures. The rooted cuttings in the mist propagator produced 4.4 times bigger stem girths than the seedlings in the lath house which had the smallest stem girth. The rooted cuttings in the mist propagator produced the tallest plants, 1.4 times and 1.9 times significantly taller than the seedlings in the propagating pit and lath house, respectively, which produced the shortest plants. There was a significant relationship between field survival of propagules and the month of establishment expressed as Y (percent survival) = -2844 + 0.070 × (month);P < 0.001;R2 = 0.68;n = 90. Rooted cuttings transplanted in a hole depth of 52.0 cm produced the biggest stem girth, 5.6 times bigger than the stem girth of the seedlings transplanted into any of the three hole depths. Rooted cuttings transplanted into a hole depth of 52.0 cm produced the highest number of leaves, three times more than the seedlings in 26 cm hole depth, which produced the least number of leaves. The study concluded that the mist propagator was the most suitable propagating structure for weaning rooted cuttings of sheanut tree since it resulted in higher survival of the rooted cuttings as well as promoted the growth of the rooted cuttings. For field establishment, rooted cuttings transplanted into hole depth of 52 cm resulted in higher survival rates and performed better in terms of growth than the seedlings. Furthermore, the month of establishment was very critical for the rate of survival of the transplanted propagules of Shea tree. 展开更多
关键词 Vitellaria paradoxa PROPAGATING structureS SEEDLING types Hole Depths
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