中考题中数学生活化试题特征和应对策略研究

数学与生活之间有着密不可分的联系,伴随着教学改革的不断发展,“数学生活化”成为新时期教师执教的重要理念.生活教学简单来讲就是在课堂教学中,努力将数学知识内容还原到生活中,基于学生现有的知识经验来进行各项教学活动的设计.这样不仅能够做到与初中数学教学、素质教育的各项要求相符合,还能够为整体教学水平的提升奠定良好基础,让学生在分析、解决实际生活中的数学问题的过程中,真正感受这一学科的魅力.在这种形势下,近些年中考试题生活化问题比例不断增加,如何有效应对生活化数学试题已成为近些年初中教学教育学术领域的研究热点.本文从学生的学习策略和教师的教学策略两个方面出发,提出了应对中考数学生活化试题的有效策略和方法.

Successful application of optimized aperture based CRS stack in the Shengli exploration area

The common reflection surface （CRS） stack is based on the local dip of the reflector and the reflection response within the first Fresnel zone. During the CRS stack all the information given by a multi-coverage reflection dataset can be successfully utilized. By now, it is known as the best zero-offset （ZO） imaging method. In this paper high quality CRS kinematic parameter sections are obtained by a modified CRS optimization strategy. Then stack apertures are calculated using the parameter sections which finally results in the realization of the CRS stack based on optimized aperture. Thus the advantages of CRS parameters are fully developed. Application to model and real seismic data reveals that, compared with the image section by a conventional CRS stack, the image section by CRS stack based on an optimized aperture improves both the signal-to-noise ratio and the continuity of reflection events.

Design and application of electric oil pump in automatic transmission for efficiency improvement and start–stop function

For the purpose of improving efficiency and realizing start–stop function, an electric oil pump(EOP) is integrated into an 8-speed automatic transmission(AT). A mathematical model is built to calculate the transmission power loss and the hydraulic system leakage. Based on this model, a flow-based control strategy is developed for EOP to satisfy the system flow requirement. This control strategy is verified through the forward driving simulation. The results indicate that there is a best combination for the size of mechanical oil pump(MOP) and EOP in terms of minimum energy consumption. In order to get a quick and smooth starting process, control strategies of the EOP and the on-coming clutch are proposed. The test environment on a prototype vehicle is built to verify the feasibility of the integrated EOP and its control strategies. The results show that the selected EOP can satisfy the flow requirement and a quick and smooth starting performance is achieved in the start–stop function. This research has a high value for the forward design of EOP in automatic transmissions with respect to efficiency improvement and start–stop function.

Application of new VBHF optimization strategy to improve formability of automobile panels with aluminum alloy sheet

A VBHF(Variable Blank Holder Force) optimization strategy was employed to determine the optimal time-variable and spatial-variable BHF trajectories,aiming at improving the formability of automobile panels with aluminum alloy sheet.The strategy was implemented based on adaptive simulation to calculate the critical wrinkling BHF for each segmented binder of the Numisheet' 05 deck lid in a single round of simulation.The thickness comparison of the stamped part under optimal VBHF and constant BHF shows that the variance of the four sections is decreased by 70%,44%,64% and 61%,respectively,which indicates significant improvement in thickness distribution and variation control.The investigation through strain path comparison reveals the fundamental reason of formability improvement.The study proves the applicability of the new VBHF optimization strategy to complex parts with aluminum alloy sheet.

Cooperative Vehicular Content Distribution in Edge Computing Assisted 5G-VANET

By leveraging the 5G enabled vehicular ad hoc network(5G-VANET), it is widely recognized that connected vehicles have the potentials to improve road safety, transportation intelligence and provide in-vehicle entertainment experience. However, many enabling applications in 5G-VANET rely on the efficient content sharing among mobile vehicles, which is a very challenging issue due to the extremely large data volume, rapid topology change, and unbalanced traffic. In this paper, we investigate content prefetching and distribution in 5G-VANET. We first introduce an edge computing based hierarchical architecture for efficient distribution of large-volume vehicular data. We then propose a multi-place multi-factor prefetching scheme to meet the rapid topology change and unbalanced traffic. The content requests of vehicles can be served by neighbors, which can improve the sharing efficiency and alleviate the burden of networks. Furthermore, we use a graph theory based approach to solve the content distribution by transforming it into a maximum weighted independent set problem. Finally, the proposed scheme is evaluated with a greedy transmission strategy to demonstrate its efficiency.

Multi-species particle swarms optimization based on orthogonal learning and its application for optimal design of a butterfly-shaped patch antenna

A new multi-species particle swarm optimization with a two-level hierarchical topology and the orthogonal learning strategy(OMSPSO) is proposed, which enhances the global search ability of particles and increases their convergence rates. The numerical results on 10 benchmark functions demonstrated the effectiveness of our proposed algorithm. Then, the proposed algorithm is presented to design a butterfly-shaped microstrip patch antenna. Combined with the HFSS solver, a butterfly-shaped patch antenna with a bandwidth of about 40.1% is designed by using the proposed OMSPSO. The return loss of the butterfly-shaped antenna is greater than 10 d B between 4.15 and 6.36 GHz. The antenna can serve simultaneously for the high-speed wireless computer networks(5.15–5.35 GHz) and the RFID systems(5.8 GHz).

Adding Value to Applied Policy Models： The Case of the WTO and OECD Support Classification Systems

Both the OECD and the WTO have accumulated systematic data on the magnitude of support going to farmers as a result of farm policies. The datasets are collected for different purposes, but both give a detailed picture of the evolution of these policies. This paper extends recent work on the compatibility or otherwise of the two attempts at policy monitoring by considering the categorization of individual policy instruments in Norway, Switzerland, the US, and the EU. The results show how the OECD dataset, particularly with respect to the link between direct payments and production requirements, complements that of the WTO. Many payments classified in the WTO Green Box require production, raising the possibility that they may distort production and trade. Though the issue of correct notifications to the WTO is the province of lawyers, the implications for modeling and policy analysis are of interest to economists, and the broader question of improving the consistency of the two datasets is of importance in the quest for transparency in the interpretation of changes in farm policies.

Farmer's Adaptive Strategies on Land Competition between Societal Outcomes and Agroecosystem Conservation in the Purple-soiled Hilly Region,Southwestern China

The worldwide extension and intensification of farming during the last century has led to ecosystem degradation and caused a series of environmental problems.Conservation of ecosystem services in agricultural regions has been implemented by top-down government actions or initiated by resilience scientists in the developed countries,but little attention was paid in the developing countries,especially in some remote mountainous regions.The present paper presents a case study showing how local farmers obtained both maximal societal outcomes and agroecosystem conservation interests in the absence of distinct boundaries between agricultural and protected ecological areas in the densely populated purple-soiled hilly region of southwestern China.The local community(Yanting County) has developed a mosaic agricultural-forestry-fishery-stock breeding system with spatially targeted land uses,diverse agricultural productions and multiple ecological partnerships.It indicates that the local farmers have hereditarily perceived sound strategies on maximizing sustainable societal outcomes and optimizing tradeoffs among macro-market,state policy,new technological facility and ecological reinforcement.

Leaming Strategies Applied by Students at University Level

The presentation aims at addressing the most frequently applied strategies for language learning adopted by Polish students of English at the university level. For the purpose of data collection, R. Oxford＇s Strategy Inventory for Language Learning （SILL） is adopted. The analysis is an attempt at identifying common existing patterns or preferred ways of language processing among learners at advanced level of language mastery.

On the Application of TED Speeches Into Flipped Learning for English Learners Taking the TED Speeches With the Keyword ＂Transportation＂ as an Example

Flipped learning is a reversal of the traditional teaching strategy, which has changed the timing of teacher＇s lectures and homework. In this revolutionary situation, the appropriateness of the before-class videos and other materials and the arrangement of class in the classroom play an important role in the fulfillment of application of the materials. Classical TED speeches are the excellent options for English language learners＇ flipped learning. This paper tends to make a case study of the application of TED speeches into flipped learning, taking the speeches with the keyword ＂transportation＂ as an example.

Mechanisms for the Application of Health Services Marketing Policies in Algeria

In this paper, we tried to give health services marketing mix and raise patients＇ interest in health services with the contribution to highlighting the possible application mechanisms of different marketing policies on health services in Algeria. Because we see that, health foundations in Algeria like other foundations live in an environment marked with constantly economic, social, politic, and cultural changes. And to respond to change requirements, especially with the appearance of health services market liberation signs, these foundations are obliged to adapt to ensure their existence and development by giving best services to meet the patients＇ needs in order to gain their satisfaction and loyalty. These ones, who became more conscious about the quality of services they are given quantitatively, qualitatively, and timely.

Hybrid optimization model and its application in prediction of gas emission

According to the complex nonlinear relationship between gas emission and its effect factors, and the shortcomings that basic colony algorithm is slow, prone to early maturity and stagnation during the search, we introduced a hybrid optimization strategy into a max-rain ant colony algorithm, then use this improved ant colony algorithm to estimate the scope of RBF network parameters. According to the amount of pheromone of discrete points, the authors obtained from the interval of net- work parameters, ants optimize network parameters. Finally, local spatial expansion is introduced to get further optimization of the network. Therefore, we obtain a better time efficiency and solution efficiency optimization model called hybrid improved max-min ant system （H1-MMAS）. Simulation experiments, using these theory to predict the gas emission from the working face, show that the proposed method have high prediction feasibility and it is an effective method to predict gas emission.

A novel Q-based online model updating strategy and its application in statistical process control for rubber mixing

To overcome the large time-delay in measuring the hardness of mixed rubber, rheological parameters were used to predict the hardness. A novel Q-based model updating strategy was proposed as a universal platform to track time-varying properties. Using a few selected support samples to update the model, the strategy could dramat- ically save the storage cost and overcome the adverse influence of low signal-to-noise ratio samples. Moreover, it could be applied to any statistical process monitoring system without drastic changes to them, which is practical for industrial practices. As examples, the Q-based strategy was integrated with three popular algorithms （partial least squares （PIE）, recursive PIE （RPLS）, and kernel PIE （KPIE）） to form novel regression ones, QPLS, QRPIE and QKPLS, respectively. The applications for predicting mixed rubber hardness on a large-scale tire plant in east China prove the theoretical considerations.

The 2.0 Marketing Strategies for Wine Tourism Destinations of Excellence

The aim of this paper is to empirically research the use of Web 2.0 applications in the communication strategies of wine tourism destinations of excellence; main attention will be focused on the integration of these tools within the ＂official＂ destination websites. The main research questions are： （1） Do wine tourism destinations of excellence worldwide make use of Web 2.0 tools in their official websites？ （2） Is it possible to estimate the degree of intensity of use of such tools？ The method used for the purpose of this research is inductive： starting from the observation of some specific cases we wanted to implement a scoring model that, taking into account the presence and intensity of the use of Web 2.0 tools selected by the wine tourism destinations of excellence, could be replicated in different contexts from the one analyzed here. The study reveals the interest in the tools of Web 2.0 by the institutional bodies responsible for management of destinations; however it also shows that there is not a full awareness of the scope of strategic and organizational development in the web 2.0 applications resulting in the relationship with potential visitors and those who have already experienced a tourist territory.

Methodological Issues and Applications in Economic Evaluation of Alternative Livestock Diseases Control Strategies： The Case of the CBPP Quarantine Line in North-Eastern Kenya

Contagious bovine pleuro-pneumonia （CBPP） is one of the endemic and life-threatening livestock diseases in the arid and semi-arid land areas （ASALs） of Kenya, which justify the case for the control of livestock diseases to avoid the spread of such diseases from the ASALs to the rest of the country, and a CBPP control quarantine line （CQL） that to help prevent the spread of CBPP from the ASALs of North-eastern Kenya to the rest of the country has been in existence since the colonial （pre-1963） times in Kenya. However, the livestock keepers in the ASALs view the CQL as an impediment to their main source of livelihoods because it entails livestock movement restrictions, thus constraining unfettered livestock marketing. Available literature shows that there is a dearth of information on the economics of livestock diseases control in Kenya in terms of its impacts on social welfare. Employing the CQL as a case study, this study shows that an application of analytic techniques that combine disease risk analysis and conventional cost-benefit modelling that incorporates some aspects that are specific to livestock diseases and their control strategies can generate indices of economic impacts of livestock diseases control on social welfare. The study finds that the livestock keepers and traders in Kenya do not consider CBPP a major problem to warrant livestock movement restrictions, yet the official records of the veterinary authorities indicate that CBPP is a major threat to the cattle industry in Kenya. Annually, the government spends substantial resources on the CQL operation and maintenance and also on CBPP surveillance and monitoring to contain the CBPP menace in Kenya. This study shows that such expenditures are economically and socially justifiable. Nevertheless, the study finds some operational inefficiencies in the enforcement of the CQL requirements. The authors, therefore, undertake an evaluation of alternative CBPP control strategies and conclude that it would be more cost effective to shift the CQL from its current location to the international borders of the arid districts, provided that this action is preceded by adequate CBPP control preparatory measures, as described in the paper.

Strategy for Controlling the Level in a Dissolved Air Flotation Chamber

The aim of the present study was to implant an efficient strategy for controlling the level of the effluent-oily foam interface in a DAF （dissolved air flotation） chamber of a pilot-scale prototype. DAF has been successfully used in the treatment of oily water, which is one of the main environmental problems in different industrial facilities. Along with important operational parameters, such as microbubble size and flow rate, the control strategy for the automation of a DAF chamber may be an important tool for increasing efficiency. Controlling the level was the strategy chosen to enhance the separation efficiency in a pilot-scale DAF prototype, with monitoring performed using a computational program in LabVIEW （laboratory virtual instrument engineering workbench）. The findings demonstrate that it is possible to maintain the level of the fluid at a reference value established by the operator using the software program through the application of classic proportional integral derivative controllers. Using this control tool, the efficiency of water-oil separation in the pilot flotation chamber prototype was increased to nearly 98%.

Bluetongue： A Hypothesis of Control Strategy through Decrease of Culicoides and Their Associated Damage in Farm

The main object of this research has been to apply the scientific assumption that the alkalization is able to make inhospitable the larval reproductive sites in the identified area （Sant＇Antioco）. The research has been conducted in the pilot farm into the selected area of Sant＇Antioco where the first hypothesis has been tested and the information about larval development has been collected. During the whole experimental period have been collected all the data about captures in the black light traps and captures in the soile traps. Experimental data first of all have been emphasize the possibility of decrease the larval reproduction extremely in the alkalized sites then have allowed to study the Bluetongue vectors density closely and its relation with the disease prevalence in the heads presents in the near farms. The results revealed the different distribution of the disease prevalence in the several farms, referable to minute variation of the farm location. In the end it seems essential to improve the farm management through the widespread action of awakening to farmers.

Behavioral Finance Theory and Its Application in Investment Decision

Behavioral finance theory is constantly relaxing or even abandons traditional financial theory rational man assumptions and the efficient market hypothesis, based on the decision-making process to the actual person＇s psychological characteristics as variables studied financial market vision, such as asset pricing and portfolio a series of questions theoretical system. In this paper, from home and abroad on behavioral finance theory, based on the current situation in our country from the company＇s investment policy analysis behavioral finance theory in corporate finance in the application, in order for some of our corporate decision makers to provide a non-decision against the company fully rational and non-efficient market investment strategy.

The optimal strategy of the college English teaching is the combination of the language teaching and the knowledge teaching

The requirements of the college English curriculum teaching put forward the teaching objectives to cultivate the English comprehensive application abilities of the students, and improve their cultural qualities and their abilities of the independent learning, which pointed out the direction for the reform of the college English teaching. The language teaching mode based on the contents of the subject advocates that the knowledge learning and the language learning with the combination of the contents of the discipline, to develop the students＇ independent learning abilities, is a feasible and effective way to achieve the goal of the college English teaching. To cultivate the students＇ practical ability of using English is the basic task of the English teaching and learning. But China＇s current college English education failed to organically and effectively combine the teaching of the language knowledge and the cultivation of the language abilities and the teaching of the knowledge, leading to the existence of the obvious price scissors in the students＇ language knowledge and the language abilities. Therefore, the key to the reform of the college English teaching is to correctly position the roles of the foreign language teachers, change the classroom teaching into the process of the two-way interaction between the teachers and the students, focus on the cultivation of the students＇ intercultural communicative competence, so that the students＇ language knowledge and their language abilities can promote each other, and obtain the coordinative development, to better adapt to the requirements of the times.

Towards industrialization of graphene oxide

Graphene oxide(GO)has demonstrated potential applications in various fields,and attracted intensive attention in industry as well.Numerous companies worldwide have been working on the industrial applications of GO-based materials in,e.g.,thermal management,multifunctional composites,anti-corrosion paints,lubricants,energy storage,environment protection and biomedicals.This review presents a short summary on the proceedings of GO towards industrialization,including the large-scale production and some promising applications,by providing views on the processing strategies and challenges specifically for the industrial use of GO.This review would help the scientists in this area to find topics for overcoming challenges together with engineers.