谈高中生人生动力的激发

新时代培养德智体美劳全面发展的社会主义建设者和接班人需要激发青年学生的人生动力。本文从理想信念出发,结合当代青年学生的人生规划的现实问题,以生动的例子从自我认知、持续努力、环境育人、思政教育等方面提出了激发高中学生人生动力的策略。

浅析《矛盾观点与人生动力》说课稿

'说课'是教学改革中涌现出来的新生事物,是进行教学研究、教学交流和教学探讨的一种新的教学研究形式,也是集体备课的进一步发展,而【说课稿】则是为进行说课准备的文稿,它不同于教案,教案只说'怎样教',说课稿则重点说清'为什么要这样教'。教师在吃透教材、简析教材内容、教学目的、教学重点、难点的基础上,遵循整体构思、融为一体、综合论述的原则,分块写清,分步阐述教学内容,以进一步提高教学效果。以下是笔者对高等教育出版社出版的中职德育教材《哲学与人生》的第二单元《用辩证的观点看问题,树立积极的人生态度》的第六课——《矛盾观点与人生动力》的说课稿。

Vibration control of pedestrian-bridge vertical dynamic coupling interaction based on biodynamic model

The human-induced vertical vibration serviceability of low-frequency and lightweight footbridges is studied based on the moving mass-spring-damper（MMSD） biodynamic model, and the mass damper（TMD） with different optimal model parameters being used to control the vertical vibration.First, the MMSD biodynamic model is employed to simulate the pedestrians, and the time-varying control equations of the vertical dynamic coupling system of the pedestrian-bridgeTMD are established with the consideration of pedestrianbridge dynamic interaction; and the equations are solved by using the Runge-Kutta-Felhberg integral method with variable step size. Secondly, the footbridge dynamic response is calculated under the model of pedestrian-structure dynamic interaction and the model of moving load when the pedestrian pace frequency is consistent with the natural frequency of footbridge. Finally, a comparative study and analysis are made on the control effects of the vertical dynamic coupling system in different optimal models of the TMD. The calculation results show that the pedestrian-bridge dynamic interaction cannot be ignored when the vertical human-induced vibration serviceability of low-frequency and light-weight footbridge is evaluated. The TMD can effectively reduce the vibration under the resonance of pedestrian-bridge, and TMD parameters are recommended for the determination by the Warburton optimization model.

MUCOSAL IMMUNE SYSTEM AND FERTILITY REGULATION IN MAMMAL AND HUMAN

皮肤和粘膜是哺乳类动物和人体的内外环境之间的第一道屏障或第一道防线。粘膜是消化道,呼吸道和泌尿生殖道的重要组成部份。在粘膜系统大约集中了70％的淋巴组织。哺乳类动物的配子成熟,运输,精卵子的结合和融合,受精卵的运输,胚泡着床等等,都是在生殖道内进行的。因此,研究生殖道的粘膜免疫系统在不育的诊断和治疗,性传染疾病的控制,避孕疫苗的研究等方面,都有很重要的意义。 粘膜免疫系统有几个显著的特点:首先,在抗体成份方面,以IgA为主,IgA的分泌量约占全身各种抗体成份的60％以上。为了刺激粘膜的体液免疫反应,局部免疫的效果最佳。参与粘膜免疫调节的细胞有T辅助细胞,T杀伤和抑制细胞,反抑制细胞,抗抑制细胞。其次在细胞免疫方面,粘膜系统有许多TCR1 T细胞,它们在粘膜免疫方面可能具有重要的功能。粘膜系统的免疫细胞的特有分布是通过细胞表面的许多受体和配体的相互作用来实现的。雌性生殖道的粘膜免疫系统的反应常与激素水平有关,如雌二醇的升高常伴随IgA的升高,孕酮的存在常有抑制IgA产生的作用。此外,在妊娠子宫内发现有许多特殊的抑制细胞和其他许多抑制因子。 在某些不孕患者的精浆内可测定到抗精子的IgA和IgG。精浆内存在许多免疫细胞抑制因子和许多免疫细胞。

Ecological Footprint and Major Driving Forces in West Jilin Province, Northeast China

The environmental impact caused by local people （ecological footprint of consumption, EFc） and the actual environmental impact that the ecosystem burdens （ecological footprint of production, EFp） in West Jilin Province, Northeast China from 1986 to 2006 were evaluated by using ecological footprint （EF） method. And the major driving forces of EFc and EFp were analyzed by STIRPAT model. Both EFc and EFp showed increasing trends in 1986-2006, accompanied by decreasing ecological deficits but expanding ecological overshoots. Population （P）, GDP per capita （A1）, quadratic term of GDP per capita （A2）, urbanization （Tα1）, and quadratic term of urbanization （Ta2） were important influencing factors of EFc, among which Tα2 and Tα1 were the most dominate driving forces of EFc. A1, A2 and Tα2 were important influencing factors of EFp, among which A2 and A1 were the most dominate driving forces of EFp. In 1986-2006, the classical Environmental Kuznets Curve hypothesis did not exist between A2 and EF （both EFc and EFp）, but did between Tα2 and EF. The results indicate that enhancing the urbanization process and diversifying economic sources is one of the most effective ways to reduce the environmental impact of West Jilin Province. Moreover, importance should be attached to improve the eco-efficiency of resource exploitation and consumption.

Spatio-temporal Pattern of Net Primary Productivity in Hengduan Mountains area, China： Impacts of Climate Change and Human Activities

Net primary productivity(NPP), a metric used to define and identify changes in plant communities, is greatly affected by climate change, human activities and other factors. Here, we used the Carnegie-Ames-Stanford Approach(CASA) model to estimate the NPP of plant communities in Hengduan Mountains area of China, and to explore the relationship between NPP and altitude in this region. We examined the mechanisms underlying vegetation growth responses to climate change and quantitatively assessed the effects of ecological protection measures by partitioning the contributions of climate change and human activities to NPP changes. The results demonstrated that: 1) the average total and annual NPP values over the years were 209.15 Tg C and 468.06 g C/(m2·yr), respectively. Their trend increasingly fluctuated, with spatial distribution strongly linked to altitude(i.e., lower and higher NPP in high altitude and low altitude areas, respectively) and 2400 m represented the marginal altitude for vegetation differentiation; 2) areas where climate was the main factor affecting NPP accounted for 18.2% of the total research area, whereas human activities were the primary factor influencing NPP in 81.8% of the total research area, which indicated that human activity was the main force driving changes in NPP. Areas where climatic factors(i.e., temperature and precipitation) were the main driving factors occupied 13.6%(temperature) and 6.0%(precipitation) of the total research area, respectively. Therefore, the effect of temperature on NPP changes was stronger than that of precipitation; and 3) the majority of NPP residuals from 2001 to 2014 were positive, with human activities playing an active role in determining regional vegetation growth, possibly due to the return of farmland back to forest and natural forest protection. However, this positive trend is decreasing. This clearly shows the periodical nature of ecological projects and a lack of long-term effectiveness.

Ophrys insectifera L.—Update of the Status of a Critically Endangered Orchid in Bulgaria

Aim： Ophrys insectTfera L. due to its peculiar biology and environmental requirements is among the most threatened and endangered vascular plants in Bulgaria. On the territory of Bulgaria the species fulfills the IUCN criteria for critically endangered [CR C2a（i）; D] and is included also in the Red Data Book of Republic Bulgaria and Biodiversity Act. The present study aimed to explore and evaluate the status of its populations and their threats. Materials and methods： Exploration mad monitoring of the populations of the critically endangered orchid O. insectifera in Bulgaria was done from 2012 till 2017. The shoot count and some morphometxic parameters were recorded for evaluation of their distribution and population dynamics. Results and discussion： At one location Ophrys insectifera can be considered extinct. However two new locations were found so the total number of known locations is increased. Approximately over 50% of the occupied territories fall outside protected sites and many of the habitats axe endangered by anthropogenic or other factors. At all of the known locations there are less than 50 shoots per place. These facts put a high stress on the perspectives of their populations＇ survival in Bulgaria.

To Complete Mourning by Becoming Specters＂ The Mutualized Coming-to-Be in The Red Violin

This essay enacts a dialogue between Francois Girard＇s film The Red Violin （1998） and Jacques Derrida＇s contemplations on ＂memory,＂ ＂spectrality＂ and ＂the work of mourning＂ to envision the possibility of opening a hopeful condition of being for those who suffer from loss. In The Red Violin, Girard＇s cinematic experiments apply techniques of montage and of repetitive musical theme, practicing intertextuality of non-chronological stories by paralleling various memories of each individual character, blurring the biological and metaphorical boundaries between the living and non-living, and highlighting the fateful interrelations among time, space and different characters＇ life experiences. In this vein, the memories and beings of both the living and the dead are tightly woven together while reproduced--or further, relived--in temporal, spatial and trans-individual dynamics. Reversing the negative imaginaries of loss and death, both Derrida and The Red Violin agree with a messianic work of mourning by exploring the powerful potentiality of spectrality that manifests a way to mutualize the subject/ other, the living/non-living, into a promised being, thus gesturing towards an infinite future.

The Cause Analysis of College Student Human Capital Depreciation in China

Human capital depreciation can be divided into stock depreciation and utility depreciation, which will cause the waste of human capital investment, and let human capital value fail to fully embody, affecting social development. In the critical time of China facing population aging and economic transformation, as the new human capital of the labor market, college students play an important role to social and economic development. Therefore, preventing and mitigating their human capital depreciation is necessary. This article focus on human capital investment and configuration stage, analyze the influence of unreasonable human capital investment system and separate labor market segmentation system to college student human capital depreciation, and put forword the corresponding countermeasures.

Energy Crisis in Nigerian University System： Implications of Self Auto-generation for Human Capital Development

Energy requirements for tertiary educational purpose is burgeoning, a reflection of its criticality to human asset formation and to use self auto-generation by petrol or diesel generators as the energy supply source is an unsustainable practice. The situation is worrisome in view of the noise pollution and nuisance that constitutes to the learning environment. This paper, therefore, determines the quantity of self generated energy supply, its intensity, the associated CO2 emissions and their possible implications for human capital development. A survey of generating sets was conducted using the University of Nigeria Nsukka as a representative of Nigerian universities. A walk-through-approach was adopted in gathering data and two metrics-life cycle cost and cost of electricity from auto-generation were used to determine the economic implications of the self generation. The results show that self auto-generation contributed installed energy capacity of amount 19 MVA, 20 MVA, 34 MVA, 11 MVA and 22 MVA to run human capital development activities, respectively for academic sessions from July 2006 to November 2010. The study helps us understand that reforms in educational sector are not effective as long as energy insecurity is a dominant factor.

The biomechanical study of lower limb during human walking

The coordinates of the marked points of joints and the changes of foot force in the human walk motion are obtained with systems of motion image acquisition and force measuring.The effects of kinematics and dynamics on the human lower limb in different loads(0,10,20,30 kg) and walking speeds(0.8,1.3,1.7 m/s) have been investigated using the human dynamics model,.The results were as follows.First,with the increasing load,the dorsiflexion angle of ankle joint increased during the procedure of toe-off,the range of motion of the knee joint decreased,the flexion angle of the hip joint increased,and oppositely,the extension angle of the hip joint decreased.Second,with the increasing speed,the range of motion of the ankle joint,the maximum flexion angle of the knee joint,the flexion angle,extension angle of the hip joint and the range of motion of hip joint increased.Finally,the torque and power of the ankle joint,the knee joint and the hip joint increased with the increasing speed and load.The results can provide an important basis for the mechanism design of lower limb power-assisted exoskeleton.

Quantitative Assessment of the Effects of Climate Change and Human Activities on Grassland NPP in Altay Prefecture

Grassland degradation in Altay Prefecture is of considerable concern as it is a threat that hinders the sustainable development of the local economy and the stable operation of the livestock industry.Quantitative assessment of the relative contributions of climate change and human activities,which are considered as the dominant triggers of grassland degradation,to grassland variation is crucial for understanding the grassland degradation mechanism and mitigating the degraded grassland in Altay Prefecture.In this paper,the Carnegie-Ames-Stanford Approach model and the Thornthwaite memorial model were adopted to simulate the actual net primary productivity(NPP_(A))and potential net primary productivity(NPP_(P))in the Altay Prefecture from 2000 to 2019.Meanwhile,the difference between potential NPP and actual NPP was employed to reflect the effects of human activities(NPP_(H))on the grassland.On this basis,we validated the viability of the simulated NPP using the Pearson correlation coefficient,investigated the spatiotemporal variability of grassland productivity,and established comprehensive scenarios to quantitatively assess the relative roles of climate change and human activities on grassland in Altay prefecture.The results indicate three main points.(1)The simulated NPP_(A) was highly consistent with the MOD17 A3 dataset in spatial distribution.(2)Regions with an increased NPP_(A) accounted for 70.53% of the total grassland,whereas 29.47% of the total grassland area experienced a decrease.At the temporal scale,the NPP_(A) presented a slightly increasing trend(0.83 g C m^(-2) yr^(-1))over the study period,while the trends of NPP_(P) and NPP_(H) were reduced(-1.31 and-2.15 g C m^(-2) yr^(-1)).(3)Compared with climate change,human activities played a key role in the process of grassland restoration,as 66.98% of restored grassland resulted from it.In contrast,inter-annual climate change is the primary cause of grassland degradation,as it influenced 55.70% of degraded grassland.These results could shed light on the mechanisms of grassland variation caused by climate change and human activities,and they can be applied to further develop efficient measures to combat desertification in Altay Prefecture.

Foraging, feeding, and physiological stress responses of wild wood mice to increased illumination and common genet cues

In nature, animals are exposed to a broad range of threats imposed by predators, which may strongly influence the ecology of prey species directly or indirectly by affecting their behavior via fear of predation. Here, we studied wood mice Apodemus sylvaticus behavioral and physiological responses to simulated predation risk. Risk avoidance was analyzed by live trapping with control traps and traps treated with feces of common genet Genetta genetta （direct cue of risk） under new moon nights and following by simulated full moon conditions （indirect cue）. The time devoted to foraging behavior and capture time were analyzed by video recording mice activity around traps. Food intake was calculated based on the amount of bait remaining in each trap. Fecal cortico- sterone metabolites （FCMs） were measured by enzyme-immunoassay as indicators of physio- logical stress responses. Fewer wood mice were captured during full moon, yet only non-breeding adult males clearly avoided common genet odor. Mice were captured sooner at night during the simulated full moon conditions and later in predator-treated traps. Foraging activity was lower when individuals faced predator＇s feces, but neither food intake nor FCM levels were affected by predation risk cues. Direct and indirect cues of predation risk selectively affected wood mice behavior, although behavioral responses seem to be modulated by different costs-benefit balances related to the individual＇s perception of risk. The lack of physiological responses to predation risk cues suggests that wood mice did not perceive them as reliable stressors or the response was too small or transient to be measured by FCM.

ON MODELING THE GROWTH DYNAMICS OF A STAGE STRUCTURED POPULATION

A Lagrangian modeling approach is applied to the numerical simulation of the temporal dynamics of a stage-structured population. The growth dynamics is determined only by the main biological processes： development of an individual, mortality, reproduction. Different approaches in modeling the development process of an individual are implemented： stochastic advection-diffusion models （backward-forward dispersion models）, and stochastic development models where regression effects, defined as negative development on the status of an individual, are forbidden （forward dispersion models）. Some properties of the residence times of an individual in a stage are investigated： in particular, their role in the calibration of the development models and in the estimation of some parameters introduced in the model equation. As a study case a multi-stage pelagic copepod population is considered. Trying to separate the effects of the main biological processes on the temporal dynamics, numerical simulations have been carried out in some idealized situations： first only the development of the individuals, neglecting mortality and reproduction, is considered; then the mortality process is introduced, and finally both the mortality and reproduction processes. The results of the numerical simulations, are compared and discussed.