混合式教学在外训专业课程教学中的应用——以“雷达新体制与新技术”课程为例

在当前高等教育与信息技术深度融合的环境下,本文针对外训层次教学特点开展学员学情分析,提出在外训专业课程中实施“线上+线下+X”的混合式教学模式:线上环节以“雷达新体制与新技术”课程为例,重点阐述了该模式的必要性及可行性,结合思维导图梳理、规划线上环节课程内容;线下环节紧密衔接线上学习内容,通过“案例”式教学培养学员工程实践能力、团队合作意识;“X”环节灵活采用情境式教学、实地考察教学等方式,在丰富教学内容的同时引入课程思政教育,展现我国现代化、信息化建设风貌,加深学员对我国的认知与认同。研究发现,通过混合式教学模式的尝试性探索及实施,有效提升了学员工程能力素质,增强了教与学的互动,专业课程教学效果明显提升。

A Participatory GIS Approach to Identify Critical Land Degradation Areas and Prioritize Soil Conservation for Mountainous Olive Groves(Case Study)

Climate change scenarios predict an increase in the frequency of heavy rainfall events in some areas. This will increase runoff and soil erosion, and reduce agricultural productivity, particularly on vulnerable mountainous agricultural lands that is already exhibiting high rates of soil erosion. Haphazard implementation of soil and water conservation （SWC） interventions on scattered fields is inefficient in reducing soil erosion. The objective of this study was to identify areas at high risk of erosion to aid the design and implementation of sustainable SWC using GIS analysis and farmers＇ participation approach. A 25 m digital elevation model （DEM） was used to derive layers of flow accumulation, slope steepness and land curvature, which were used to derive an erosion-risk （priority） map for the whole watershed. Boundaries of farmers＇ fields were mapped and verified by the community and each field was classified into high, moderate or low erosion risk. Fields with low flow accumulation （top of hill） and/or steep slope and/or convex slope were assigned high erosion risk and therefore high implementation priority. The study showed that more than 54% of the fields were classified into high erosion risk areas. Accordingly, a community-watershed plan was established, revised and approved by the community.Incentive loans to implement SWC measures were distributed to 100 farmers based on the priorities of their fields. Judged by local farmers and using 16 randomly selected fields, 90% of the targeted areas were correctly identified using the erosion risk map. After two years, the conservation measures had led to marked improvement of soil conservation. The approach is simple and easy to comprehend by the community and provides scientific basis to prioritize the implementation of SWC and to target the most degraded areas, which amplify the impact of these in reducing the vulnerability to land degradation.

Differences of Vowel Pronunciation in China English and American English： A Case Study of [i] and [I]

This paper investigates the differences between vowels [i] and [ I] pronounced by Chinese English speakers and American English speakers. Seven people consisting of two natives and five Chinese have read a list of sentences and their voices were recorded. A software program is used to analyze their voices. In spectrograms generated by Praat, the connection between formant values and articulation features is used to investigate how native speakers pronounce these two vowels and what the differences are between native speakers and Chinese speakers. Through this investigation, it is discovered that Chinese speakers have lower tongue position in [i] and their tongues are more forward in [I], thus making it hard to differentiate these two vowels. Moreover, the length of [i] is much shorter than those in American pronunciation, suggesting that Chinese speakers differentiate [i] and [I] largely by length. However, the comparison of Chinese speakers and native speakers proved otherwise.

The ＂Win-Win-Win Papakonstantinidis Model＂ as a Bargaining Solution Analysis for Local Government Decision From Territory-Community to ＂Behavioral＂ Community： The Case of Greece

Local development as a local management process tables a number of questions, mainly concerning on conflict resolution between the three power local poles： （1） State and its appointed State peripheral Departments; （2） Local authorities; and （3） Local people and their local movements/lobbies. As the three poles are in a constant negotiations, then each of them should prevail over the other two, thus be introduced in the bargaining problem. Bargaining behavior must therefore be defined. The suggested ＂＇win-win-win papakonstantinidis model＂ （coming from Nash win-win extended approach） tries to find ways for the three-pole bargaining conceptual equilibrium, under conditions, thus maximizing expected utilities for all the involved parts in local decision-making by applying a combination of Descriptive Behavior （DB）, Rational Choice, Instrumental Rationality, and the Applied Behavioral Analysis （ABA） methodologies, then an updating community＇s behavioral state is expected, thus transforming the technical territory-community perception to a behavioral community perception, by sensitizing its population, towards the ＂guanxi relations＂ paradigm.

SWOT Analysis on Flipped Classroom Based on Chinese Setting

The flipped classroom as a new teaching mode has provided a new thought for the development of teaching and learning. This paper first introduces the concept and features of flipped classrooms, and then compares some typical cases of flipped classrooms at home and abroad. Based on this, this paper introduces the business analysis method --SWOT analysis, to analyzes the strengths and weaknesses as well as the opportunities and threats of flipped classroom application in China. In addition, enlightenment on the application of flipped classroom in theory and teaching practice are provided in the final part of the paper.

School-to-Work Transition in Saudi Arabia： A Case Study of Youth Cohorts

The paper addresses the youth＇s perception towards jobs and career opportunities in Saudi Arabia, based on the school-to-work transition model. The study is based on a sample survey covering 600 youth cohorts in Yanbu and Jeddah in the Kingdom of Saudi Arabia. The study reveals that school-to-work transition is not a smooth one and is influenced by the perception of youth towards employment and its various dimensions along with the ambitions towards career improvement. The 14 indicators framed in the paper reveal that essentiality, confidence to get a job that satisfies the needs, job availability, and qualifications are found to be important determinants of youth＇s attitude towards work; whereas, willingness to do any job did not get much acclaim. Job selection of youth is determined by location （especially hometown job）, sectoral preferences, training options, and work environment.

Optical Operator Method in Two-Mode Case and Entangled Fresnel Operator's Decomposition

Based on the entangled Fresnel operator （EFO） proposed in [Commun. Theor. Phys. 46 （2006） 559], the optical operator method studied by the IWOP technique （Ma et al., Commun. Theor. Phys. 49 （2008） 1295） is extended to the two-mode case, which gives the decomposition of the entangled Fresnel operator, corresponding to the decomposition of ray transfer matrix [A, B, C, D]. The EFO can unify those optical operators in two-mode case. Various decompositions of EFO into the exponential canonical operators are obtained. The entangled state representation is useful in the research.

Case Study on Hybrid Business Model： KT＇s Olleh TV Skylife

This paper aims to analyze a case of a telecom operator, Korea Telecom （KT）＇s hybrid business model---Olleh TV Skylife （OTS）. This case is KT＇s new hybrid network and set-top-box （STB） which combines Internet Protocol TV （IPTV） with Direct-To-Home （DTH） satellite reception and business. It serves now as a guideline to better understanding hybrid consumer behavior and their needs. This paper shows how KT＇s OTS has been formulated as a new business model, how it has changed the market structure, and how it has experienced a successful market performance with new business idea and innovative technology. Before analyzing this case, it firstly discusses about the technological situation and the industrial organization （IO） theory. After this, it shows the previous service offerings of cable TV, satellite TV, and IPTV, before launching OTS and shows that the mixed service portfolio of satellite TV and IPTV is the perfect service combination to beat the cable TV in terms of hybrid consumer needs. After explanation about OTS, this paper verifies whether this hybrid business model really changes market and generates a good market performance and operating synergy with KT＇s other businesses of content, network, and marketing. In conclusion, this paper expects future growth potential of OTS and KT Skylife in terms of subscription fee, home shopping, and advertising sales based on the total subscriber base.

Potential Impacts of Various Land Use Forms on Land Degradation in Arid Regions （Case Study： Kuwait）

During the last 20 years, land use in Kuwait was remarkably changed in various forms. Such changes resulted in positively constructive, as well as, adversely destructive impacts on the local environment and ecology. In 1993-1994, a buffer zone of 15 km wide and more than 200 km long was established between Iraq and Kuwait. This allowed the restoration of biodiversity, enhancement of ecological conditions and stabilization of fragile soils. In 1991, long bund walls were constructed along the Saudi-Kuwaiti borders by Saudi Arabia and in 1993-1994, a ground trench was dug along the Iraqi-Kuwaiti borders by Kuwait. Bund walls are piles of excavated soils, 2-3 m high, 3-5 m wide and several tens of kilometers length. Constructing 1 km length of a bund wall required 2,500-3,000 m3 （1,000 m length x 5 m average width x 0.5 m depth） amount of soil, which disturbed a groundcover strip of an average area of 10,000 m2 （1,000 m length x 10 m average width）. Border trenches are ground hollows 2-3 m deep, 3-5 m wide and 220 km long. The amount of excavated soil from digging 1 km long trench ranged from 6,000-8,000 m3. Field work indicated that 1 km long of trench had disturbed a groundcover of an average area of 12,000 m2 （1,000 m length ~ 12 m average width）. Such man-induced land features are closely related to land degradation processes, as they were of adverse environmental impacts on soil, surface hydrologic conditions and natural vegetation. The main objective of this study is to assess the immediate and long term impacts of the introduced land use forms in selected areas in Kuwait, such as Wadi AI Batin （Western part of Kuwait）. To achieve such an objective, intensive field program was designed and implemented and the collected data and available information were analyzed and interpreted.

Preliminary Remarks on Transmission and Communication in Ancient Greece： A Case Study in Mediology

The scope of this paper lies primarily on the recognition of what Debray called transmission and communication, however, in this article exclusively with regard to the Ancient Greek literature and culture. Transmission understood as the process in which ＂agencies and human actors transmit the ideas in historical and diachronic order＂ and communication implying the ＂synchronic interchange by linguistic impact between senders and receivers＂ are presented as two paths in which cultural messages are introduced and transmitted by means of ＂literary production＂. Early Greek literature, which was based on the oral performance and mirrored the language in its prototypical form, seemed to be the main source of information for the reconstruction of the two above processes. In the proposed model, the new understanding of the media introduced by Debray plays the most important role, because in the theory of ＂cultural transmission＂, the medium can be not only ＂a symbolic process, a social code, a material device＂ but also a human being. Therefore, on the basis of this theory, mediology can be described as the way of 4M： message, medium, milieu, and mediation.

A New Typhoon Bogus Data Assimilation and its Sampling Method:A Case Study

In this study,the authors introduce a new bogus data assimilation method based on the dimension-reduced projection 4-DVar,which can resolve the cost function directly in low-dimensional space.The authors also try a new method to improve the quality of samples,which are the base of dimension-reduced space projection bogus data assimilation (DRP-BDA).By running a number of numerical weather models with different model parameterization combinations on the typhoon Sinlaku,the authors obtained two groups of samples with different spreads and similarities.After DRP-BDA,the results show that,compared with the control runs,the simulated typhoon center pressure can be deepened by more than 20 hPa to 30 hPa and that the intensity can last as long as 60 hours.The mean track error is improved after DRP-BDA,and the structure of the typhoon is also improved.The wind near the typhoon center is enhanced dramatically,while the warm core is moderate.

China＇s Direct Investment in Advanced Economies： the Cases of Europe and the United States

Chinese outward foreign direct has increased substantially in recent years, investment （OFDI） in developed economies driven by structural adjustments in China ＇s economy. This article describes the inflection point of Chinese investment in the European Union and the United States since 2008. A new data set is used to highlight similarities and differences of Chinese investment patterns in the world＇s two biggest economies. The second part examines the policy response on both sides of the Atlantic to promote investment from China and at the same time address political and economic risks related to these new flows.

Case Study of Indirect Adiabatic Cooling System in Historical Building

The objective of the present study is to investigate the efficiency of indirect adiabatic chiller-based cooling system efficiency dependence of outdoor air humidity. The system is located in historical building, in temperate climate of Latvia. The data about electricity consumption, water consumption, chiller operation stages, cooling average temperatures and outdoor air parameters have been acquired for the period of 2.5 month, during the cooling season. Using data collected by BACnet based BMS controllers and adiabatic chiller control system, we have analyzed operation efficiency of the chiller and its dependence of outdoor air humidity. Data range for the period from August 1st till October 13th, 2011 was taken for deeper analysis, which showed that in temperature range 22.0 ± 0.5 ℃ for the studied period of time chiller＇s COP is slightly dependent on the outdoor air moisture.

Mating patterns and pollen dispersal in a Japanese larch(Larix kaempferi) clonal seed orchard： a case study

Pollination dynamics highly determines the genetic quality of seed orchard crops. However, there is less research about the effect of mating patterns on seed productivity of orchard crops. So far, clonal seed orchards have been producing genetically improved seedlings used for most Japanese larch(Larix kaempferi(Lamb.) Carr.) plantations in China. In the present study, a total of 17 highly variable simple sequence repeat(SSR) markers were used for genotyping a progeny trial population consisting of 647 open-pollinated progenies germinated from seeds which were collected from 63 maternal clones with 140 potential paternal clones in a Japanese larch clonal seed orchard in China. Paternity analysis was used in the present case study in order to evaluate the level of paternal gametic contribution, estimate pollen contamination and selfing rates, and investigate pollination patterns,pollen dispersal patterns and the impact of mating patterns on seed productivity of orchard crops. We observed 93.7% of the success rate of the parental assignment, unequal paternal gametic contribution(0–12.4%) with 6.3% of the progenies derived from pollen contamination or unsampled pollen donors, and absence of evidence for selfing. We also found that pollination rate highly depended on the distance between pollen donors and maternal parents, the majority of the identified crossing(65.7%)occurred between clones within a 150-m radius, and large variations in growth performance existed among the paternal halfsiblings. Progeny growth performance(diameter at breast(DBH) and height(HGT)) was measured at Age-20 in order to investigate the impact of mating patterns on timber production of orchard crops. As either the paternal or maternal, two clones(i.e., clones Z38 and Z62) were identified to have produced progenies with higher average stem volume breeding values than that of all of the progenies. Specifically, the genetic gains for volume were 3.53% for the two clones as paternal parents, and 8.26% as the maternal parents at Age-20. Thus, both elite clones were ideal candidates for the construction of next-generation clonal seed orchards due to their synchronous reproductive phenology with greater crossing rate and higher genetic gain. These results improved the pedigree information to provide solid evidence of mating patterns for future design and effective management of seed orchards and for the development of viable long-term breeding strategies for other coniferous species.

A critical case of Rallis inner product formula

Letπbe a genuine cuspidal representation of the metaplectic group of rank n.We consider the theta lifts to the orthogonal group associated to a quadratic space of dimension 2n+1.We show a case of regularised Rallis inner product formula that relates the pairing of theta lifts to the central value of the Langlands L-function ofπtwisted by a character.The bulk of this paper focuses on proving a case of regularised Siegel-Weil formula,on which the Rallis inner product formula is based and whose proof is missing in the literature.