高考真题与教材资源深度交融的教学设计策略——以《近代以来的世界贸易与文化交流的扩展》一课为例

选择性必修课程旨在引导学生从多角度深入认识历史。如何用好专业化程度高、以高考升学为导向的选择性必修教材,成为一线教师面临的重大课题。本文尝试将高考真题资源与教材辅助资源以深度交融的方式,引入教学设计过程中,达到用好新教材和培养学生历史学科核心素养的目的。

Study on the Biological Diversity of Nematode-trapping Fungi in Erhai Lake

[Objective]The research aimed to investigate the biological diversity of nematode-trapping fungi in the sediment of Erhai Lake.[Method]616 pieces of sediments were collected from Erhai Lake.The traditional classification and identification methods were used to isolate,purify and identify.[Result]3 genera and 22 species of nematode-trapping fungi were isolated.Arthrobotrys oligospora,A.musiformis and Dactylella leptospora were the dominant species,and their detection rates were 28.05%,16.04% and 8.92% respectively.By analyzing the diversity of nematode-trapping fungi in four seasons,it was found that the biological diversity was richer in summer,spring and autumn,and the diversity indexes were 2.59,2.47 and 2.34 respectively.The diversity index in winter was 1.48 and was lower.Species forming the adhesive nets were predominant;positive rate was 41.00%.[Conclusion]The rich nematode-trapping fungi resource existed in Erhai Lake,and its biological diversity had the seasonal variation characteristic.The nematode-trapping fungi which formed the viscous net were the dominant species in Erhai Lake.

Emergence as a process of resources flowing in supply chain system

To accurately describe the resource values that agents possess in the complex supply chain system which is a result of the interaction among the agents and to make correct decisions regarding quantity, time and place of the resources, the characteristics of the resource values in the supply chain are analyzed. ＂Chromosome＂ is used to express a resource value in the supply chain, and eight random numbers are used to integrate the resources. The if-then rules and correlation chance constrained programming in the resource supply-distribution model are set up and they are used in a three-tiered-echo model which can describe the kinds of interactive behavior of the agents in the supply chain system. Simulation is done in the platform of Swarm with a genetic algorithm. The results show that the resources in the supply chain complex adaptive system are an organic whole that cannot be separated. The three-tiered-echo model can accurately describe the interaction of resource flows of agents in the supply chain system. The system can attain optimization by utilizing the resources in the supply chain if the agents in the system cooperate, compete and distribute resources according to this model.

“三部曲”促数学复习课高质量互动

克服教师单向输出,实现师生、生生高质量互动,是突破复习课存在问题的重要关注点。笔者从问题出发,基于教学实践,提出了"放下"大问题,促发高思维水平的互动;"回收"真资源,调动高密度参与的互动;"生成"新结构,形成有生长感的互动等,促进复习课高质量互动三部曲,为一线教师上好复习课提供参考。

品德课程离回归生活还有多远

品德课程回归生活包括出发点上的回归和归宿点上的回归。从操作层面来说，它至少包括对教材的二度开发、教学使用真资源、珍视课堂的生成问题等方面的内容。

Scheduling Scheme for Cellular-Based Machine-Type Communication

Cellular-based Machine-Type Communication (MTC) will become more and more important in the near future for the advantage of the long-distance wireless communication.However,a large number of MTC applications introduce heavy load to cellular network.MTC traffic scheduling schemes are proposed to avoid congestion in this paper.Our approaches are based on the delay-tolerance of MTC traffic.Some MTC traffic is postponed until the network load becomes light.Moreover,our scheme efficiently utilizes the bandwidth resources reserved for handover in traditional cellular network.Simulation results show that the utility usage of radio resources is improved and the congestion probability is reduced.

Preparation and characterization of Martian soil simulant NEU Mars-1

To develop Martian soil simulant,basalts of the Chahar volcanic group in Wulanchabu,Inner Mongolia,China were selected as the simulant initial materials,which were ground and sorted to a predetermined particle size ratio,and small amounts of magnetite and hematite were added.The main phases of NEU Mars-1 simulant were plagioclase,augite and olivine.The glass transition and crystallization temperatures of NEU Mars-1 were 547.8 and 795.7°C,respectively.The complex dielectric constant,magnetic conductivity(0.99-1.045),and dielectric loss tangent angles(0.0025-0.030)of NEU Mars-1 were all stable in the frequency range of 2-18 GHz.Mossbauer spectroscopy results showed that the mass ratio of Fe2+to Fe3+in the simulant was 77.6:22.4.The NEU Mars-1 Martian soil simulant demonstrated particle size ratio,chemical composition,phase composition,thermal stability,and dielectric property similar to Martian soil,and can be used as the substitute material to extract oxygen and metals with in-situ resource utilization technologies.

Control strategies and hardware-in-the-loop simulation for bus signal priority

It is considered as an important and effective means to give priority to the development of public transit which can improve the efficiency of transportation resources utilization and alleviate traffic jams. Public transit signal priority belongs to the "time priority" among the right-of-way priorities. After reviewing the existing bus priority signal control strategies and the advances in related technologies at home and abroad, this article analyzed the breakthrough direction of the bus signal priority design technologies suitable for China's conditions, and then proposed the hardware and software systems and the modules for the bus priority signal control system. Finally, the hardware-in-the-loop simulation (HILS) was introduced to evaluate bus priority signal control programs in order to optimize the control strategies.

Uplink user allocation scheme in cognitive coexistent cellular network

In order to address spectrum resource scarcity in traditional cellular networks,television(TV)white space is considered as a potential solution to offload a portion of network traffic and enlarge network capacity.This paper describes a cognitive cellular network which allocates low geometry users to the TV white space based on a proportional fair criterion.An uplink user allocation scheme is proposed and the validity of the proposed scheme is established by simulation of the cellular network usage in conjunction with the TV white space.The simulation results show clear improvements in both the user and the system performance with the cognitive coexistent cellular network compared with the traditional cellular network,and that the performance of the proposed user allocation scheme is superior to other user allocation schemes.

Can Lithium Energize Sustainable Development in Bolivia？ Institutional and Policy Challenges

A new extractive boom looms over Bolivia, home to roughly a third of the world＇s lithium reserves. Since previous mining booms have not put the country on a sustainable development path, this paper briefly outlines the initial results of a research on policy options to break away with the past. The paper first assesses the relationship between resource dependence and sustainable development by looking at the evolution of genuine savings in Bolivia and neighbouring, resource-rich countries. It then discusses Bolivia＇s potential position on the world＇s lithium market and examines the institutional variables that shape perceptions, expectations and policy options at national and local levels. Notwithstanding major technological challenges, the paper concludes that further research should shed light on how inclusive processes can be nurtured in rentier states, and how far specific institutional reforms can contribute to turning the looming lithium boom into sustainable outcomes in the Bolivian case.

Zakat, Local Social Organization, and Social Capital in Rural Economic Development

Zakat as a source of development funding encourages well functioning of local organizations and social capital formation. Zakat management conducted by an organization with a set of norms promotes the development of local community organizations＇ function for the rural economic development activities. A case study was conducted in the Village of Patila, South Sulawesi Province. The community in this village successfully managed the selfsupporting development of social and agriculture infrastructures. Data collected were the activities of local organization of the board members of the mosque and educational development foundations, farmer group, and collective stall group. The results showed that a community truth on the mosque and educational development foundations was formed by the social infrastructure development of mosque and schools through the effectiveness of the zakat payment by rules （norms）. Both development foundations could function well through the network with villagers who migrate to other island as a potential zakat payer. Strengthening the social development organization supported the development of collective stall and pump farming system. The process of social and economic development in the Village of Patila as well as social capital formation encouraged people to carry out selfsupport development activities.

Improved Blind Multiuser Detection Algorithm Based on Minimum Output Energy

Based on minimum output energy,an improved blind multiuser detection algorithm is proposed by the use of Hopfield neural network.Compared with traditional algorithms,the proposed algorithm does not need the circuit for constraints.The resources are greatly saved and the complexity is reduced as well.The simulation results show that the performance of the improved algorithm is similar to that of the optimal multiuser detection algorithm which is not suitable for the mobile station.Compared with the traditional gradient blind multiuser detection algorithm,the convergence speed of the improved algorithm is quickened.

Developments of solar collectors in China

China has abundant solar energy resource. Solar thermal collectors, particularly all-glass evacuated tubular collectors, have been studied and developed for 30 years, and solar thermal industry has developed rapidly for 15 years. There are various solar thermal systems, with an operation area of around 108 million m2 in 2007. These systems mainly provide domestic hot water, but some other applications are under extensive study and development as well.

Effects of Labor Allocation Distortion and Distortion-Free Scenarios on Industrial Output in China——An Empirical Study Based on Data of Production Industry Sectors

This paper aims to investigate the effects of labor allocation distortions and various levels of distortion-free labor allocation on social output in China's primary,secondary and tertiary industries.Theoretical model creation and empirical study have led us to the following findings:the quantity of workforce in China's primary industry exceeds the quantity of workforce under the scenario of distortion-free labor allocation and the same is generally true for China's tertiary industry.However,the quantity of labor allocation in secondary industry is significantly below the level of distortion-free allocation but the share of allocation distortion overall tends to decline.Labor allocation distortions for various sectors are mainly caused by intra-sectoral allocation distortions and sectoral wage differences,of which the effect of internal distortion factor is the most obvious.In terms of total output,the eliminations of total distortion,wage difference distortion and internal allocation distortion will all cause total social output to exceed original output,and labor reallocation accompanying capital change will not only bring about a further increase of output but may offset the defects of limited potentials of labor resources reallocation.Growth rates with the eliminations of wage difference distortion,internal allocation distortion and superimposed factor can basically explain for the growth rates with the elimination of all distortions.Given this background,it is necessary to take effective measures at an early date to reduce China s labor allocation distortions and improve overall economic efficiency.

Set Relationships between Tourists' Authentic Perceptions and Authenticity of World Heritage Resources

Tourists’ authentic perceptions are crucial for the development of world heritage resources. The paper focuses on exploring the relationships between tourists’ authentic perceptions and authenticity-based tourism development of world heritage. Through the empirical study on the Forbidden City in Beijing, we find that the relationships between the above two factors can be simulated by the model of set theory in algebra. As a result, five types of set relationships are proposed： “separation relation”, “intersection relation”, “inclusion relation I”,“inclusion relation II” and “superposition relation”. According to sample distribution rules, the set relationships can be further divided into primary set relationships and secondary set relationships. The study on set relationships based on demographic characteristic of tourists by using two-way analysis of variance method shows that the tourists in different groups of gender, ages, levels of education, visit frequencies and levels of early perspectives have different perceptions for the set relationships. The ifndings in this paper are helpful for identifying effects of the authenticity-based exploitation of world heritage resources and proposing future strategies for world heritage resources from tourists’ authentic perspectives.