基于转子铜耗的异步机运行状态分类

提出一个关于异步机运行状态的新的分类方法:转子铜耗法。按此法,异步机运行状态可分为两个:差能态、和能态。差能态包含电动、发电两个态;和能态对应电制态。转子铜耗分类法对学习和巩固异步机制动知识点尤其有帮助。

Static and dynamic mechanical behaviour of ECO-RPC

Ecological reactive powder concrete (ECO-RPC) with small sized and differentvolume fraction steel fibers was prepared by substitution of ultra-fine industrial waste powder for50% to 60% cement by weight and replacement of ground fine quartz sand with natural fine aggregate.The effect of steel fiber volume fraction and curing ages on the static mechanical behaviour ofECO-RPC was studied. Using the split Hopkinson pressure bar technique, the dynamic mechanicalbehaviour of ECO-RPC was investigated under different strain rates. The results show that the staticmechanical behaviour of ECO-RPC increases with the increase of steel fiber volume fraction andcuring ages. The type of ECO-RPC with the substitution of 25% ultra-fine slag, 25% ultra-fine flyash and 10% silica fume is better than the others with compressive strength, flexural strength, andfracture energy more than 200 MPa, 60 MPa and 30 kJ/m^2, respectively. ECO-RPC has excellent strainrate stiffening effects under dynamic load. Its peak stress, peak strain and the area understrain-stress curve increase with the increase of strain rate. Its fracture pattern changes frombrittleness to toughness under high strain rates.

Dental Variation Among Asian Colobines, with Specific Reference to the Macaques on the Same Continent

In order to discern dental morphometric variations among the Asian colobines, residuals of the colobines, derived from allometric baselines formed by the Asian macaques （Macaca）, were analyzed with Principal Components Analysis and Euclidean Distances. Results indicated that the widely accepted view that the colobines possess relatively smaller front teeth than the macaques is only the case for the first incisors. The colobines show relatively smaller molars than the macaques. Such profiles may be related to the differences in dietary preferences between the two major groups of the Asian Old World monkeys. The magnitude of such differences is not as great as usullay assumed for the two groups that contain both African and Asian taxa. In other words, the two Asian cercopithecoid groups may have homogenously been shaped by the tectonic modifications and climate alterations in the past five million years. There exist marked differences among the Asian colobines when each of the genera is compared with macaques; the dental profile reflects not only the variation in geographic distribution but also in phylogenetic divergence. Thus, the snub-nosed monkeys （Rhinopithecus） and the gray langurs （Semnopithecus） are characterized by relatively larger molars than the other colobines - larger even than those of the macaques. The differences among Asian colobines, depicted by Euclidean Distances, seems to reflect the relationship of the phylogeny and evolution between colobines and cercopithecines.

Plant and Its Control Mechanisms

The regeneration of its cells is one of the two goals of the plant. The control systems try to allow to cells to optimize their state depending on the circumstances, sometimes in advance. The first of these systems is located in the root. It controls the materialistic input for the regeneration and at the same time is the source of primary information about the state of this input and its development at time. Another element of the control is the system controlling the formation and the distribution of the energy. This control is made without making provision for the state of individual cells. The successfulness of individual cells is taking into account by the system connected with companion cells in the vascular bundle. The similar holds for the second system. It, on the basis of the tension on the boundary of the plant, controls the dynamics of the boundary and removes the tension. The second goal of the control, besides the regeneration, is the optimization of the existence of the plant as whole. For this sake new global criteria arise and are used throughout the control.

Therapeutic efficacy and mechanism of heat-sensitive moxibustion for vascular dementia

Objective:To observe the clinical efficacy of heat-sensitive moxibustion for vascular dementia and explore its mechanism.Methods:A total of 70 patients with vascular dementia were randomized into an observation group and a control group,with 35 cases in each group.The control group was treated with piracetam,and the observation group was treated with heat-sensitive moxibustion on the basis of the treatment of the control group.The treatment lasted for 8 weeks.Before and after the treatment,the mini-mental state examination(MMSE),activity of daily living(ADL)and traditional Chinese medicine(TCM)symptom scores were assessed,and the levels of acetyl choline(Ach)and homocysteine(Hcy)were measured.The efficacy was evaluated after treatment.Results:The total effective rate of the observation group was significantly higher than that of the control group(P<0.05).After treatment,the MMSE and ADL scores in the observation group decreased significantly,and were lower than those in the control group(all P<0.05);the TCM symptom score of the observation group decreased significantly(P<0.05),while that of the control group had no significant change(P>0.05);the plasma Ach level in the observation group increased significantly(P<0.05),and the Hcy level decreased significantly(P<0.05),which were statistically different from those in the control group(both P<0.05).Conclusion:Heat-sensitive moxibustion plus piracetam is effective in treating vascular dementia.It can significantly improve dementia symptoms and ADL,which may be related to the correction of plasma Ach and Hcy levels.

Effects of biodiversity,stand factors and functional identity on biomass and productivity during the restoration of subtropical forests in Central China

Biodiversity is found to have a significant promotion effect on ecosystem functions in manipulation experiments on grassland communities.However,its relative role compared with stand factors or functional identity is still controversial in natural forests.Here,we examined their relative effects on biomass and productivity during forest restoration.We investigated stand biomass and productivity for 24 plots(600 m2)across restoration stages in the subtropical forests of Mt.Shennongjia,Central China.We measured five key functional traits and calculated functional diversity(functional richness,evenness and dispersion)and community-weighted mean of traits.We used general linear models,variation partitioning methods to test the relative importance of stand factors(density,stand age,maximum height,etc.),functional identity,species and functional diversity on biomass and productivity.Our results illustrated that stand biomass and productivity increased significantly as forest restoration,and that community species richness increased,while functional dispersion decreased significantly.Variation partitioning analyses showed that diversity had no significant pure effects on biomass and productivity.However,diversity may affect biomass and productivity through the joint effect with stand factors and functional identity.Overall,we found that stand factors had the strongest effect on biomass and productivity,while functional identity significantly affects productivity but not biomass,suggesting that modulating stand structure and species identity are effective ways to enhance forest carbon storage and sequestrations potential in forest management.

Combating Desertification and Improving Local Livelihoods through the GGWI in the Sahel Region: The Example of Senegal

The Great Green Wall Initiative（GGWI） has an overall objective of fighting desert encroachment through proven practices of sustainable management of land, and the reinforcement and protection of natural resources and systems of production and transformation, while also ensuring socio-economic development of local communities through multi-purpose activity platforms. The activities described in the present study are designed to accomplish several goals：（1） generate wealth,（2） strengthen access to basic social services,（3） manage the transition to a green economy as a means of creating suitable conditions for the emergence of rural production centers,（4） integrate sustainable development in order to eradicate poverty and food insecurity, and（5） strengthen adaptation and resilience capacities of local populations. The present study was undertaken on the basis of a wide variety of available publications and documentation, including articles and scientific papers, thesis, meeting summaries and reports, concerning the implementation of the Great Green Wall Initiative/GGWI in Senegal.

通信枢纽楼能耗运行分析研究

如何在业务量不断增加,电源容量无法扩容的情况下,更好地解决供电能力紧张、机房装机位不足、机房散热等问题,是本论文的研究意义所在。本文通过对S省通信枢纽楼能耗运行分析,给出以上难点的合理化建议和建设指导原则。