Symbiosis of language testing and language teaching:The journey of the 37^(th) Language Testing Research Colloquium( LTRC 2015) in Toronto,Canada

The 37th Language Testing Research Colloquium(LTRC 2015①)was held at Eaton Chelsea Hotel in Toronto Canada during March 16-20,2015.The first two days of March 16-17 were preconference workshop days with March 18-20 as the three main conference days.More than 300 participants from 27 countries and regions joined the conference.The top numbers of the

Testing Research about Characteristic Parameters of the Grounding Device at 750 kV Substation of Riyue Mountain,Qinghai

750 kV substation of Riyue Mountain, Qinghai is a substation that annual average thunderstorm days are the maximum at the same volt- age level and altitude in the wodd. We detailedly described testing methods and steps of 6 characteristic parameters for grounding device of 750 kV substation by using 8000S comprehensive test system, and scientifically judged overall performance of the grounding device. Moreover, we espe- cially emphasized key and difficult points in testing process, providing reference for the majority of grounding test workers.

RESEARCH ON SONIC FATIGUE CALCULATION AND TEST FOR AIRCRAFT PANEL

The sonic fatigue life of the aluminium rectangular panel was calculated using the concise method[1], and the sonic fatigue test was conducted on progressive wave tube (PWT) test facility. A comparison was made between the results of calculation and test, and it shows reasonable agreement between these two results.

大辽河河口地区污染边界层特征试验研究(英文)

By using the meteorological data in the pollution boundary layer which was observed in two ground observation sites:coast and land in the river outlet area of Grand Liao River during January-February in 2007,the daily change characteristics of pollute boundary layer in winter in the area were discussed. The results showed that the pollute boundary layer in the river outlet area of Grand Liao River was affected by the sea and land. In the certain weather condition,maybe the sea-land breeze appeared in the low altitude which was below 200 m in the coastal zone. The stability change in the different height in the coastal zone was more stable than in the land zone,and the wind field change in the area was mainly in 300 m low altitude. At night,the temperature inversion often appears in the area,and the thickness of temperature inversion layer is stably during 200-300 m. The thermal internal boundary layer penetrated deeply into the land about 10 km,and the height could reach 800 m. The atmospheric diffusion ability in the coastal area was weaker and stronger in the land area.

The Research and Application of ATM Testing

The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;The research for testing methods and technology of ATM is important for us to develop ATM networks, to promote their construction, to ensure that various ATM devices provided by different providers interoperate properly and to provide excellent services for telecommunication users.\;After discussing the abstract testing method of conformance testing and the abstract description of protocol testing, the thesis puts forward a kind of abstract testing configuration for ATM testing and a kind of abstract description method for testing case.\;From the angle of application, the thesis discusses the basic rules for ATM testing. After that, the thesis points out that the ATM testing must be made from the four aspects of normal testing, conformance testing, performance testing and interoperability testing. The general testing methods, general configuration and connection for ATM testing and the selection of ATM testing items are discussed, respectively, in the four aspects.\;Combined with the characteristics of the traffics supported by ATM systems, the thesis discusses several kinds of traffic models for conducting ATM testing. On the basis of studying various traffic models, the author classifies traffic models for ATM testing as three kinds: periodic traffic models, stochastic traffic models and manual traffic models. The parameters of describing traffic models and their calculating method are discussed in the thesis. A new kind of periodic cell sequence traffic model is proposed in this thesis. The periodic cell sequence traffic model has excellent linearly descending characteristics in the cell interval. The traffic models discussed in this thesis can be applied to various ATM testing cases.\;From the point of normal testing, physical layer testing, ATM layer testing, AAL layer testing, network management testing and signaling testing, the thesis studies and normalizes actual ATM testing cases, testing methods and testing steps. Various kinds of testing cases and relative testing purposes, testing steps, testing configurations, testing connections and testing judging rules are also discussed and normalized in the paper.\;In the end, the selecting method of testing duration for bit error rate testing studied in the thesis according to the bit error rate criterion has been determined to the systems under testing. The judging method to determine bit error rate of the systems under testing is given with the results of bit error rate testing that has been conducted in the determined time duration in the past.

Design and testing of planting unit for rice dry-direct-seeding planter in cold region

Rice dry-direct-seeding technology is a time-saving,cost-saving and efficient rice cultivation technique that increases the efficiency of seeding.In order to implement the specialization,light simplicity and scale of rice production,improve the level of mechanization of the whole rice production process,and solve the problems of uneven seed furrows,uneven number of seeds sown,shallow mulching and uncompact repression that occur during the promotion and application of dry-direct-seeding for rice in the cold region of northeast China.In this paper,a planting unit for rice dry-direct-seeding planter is designed.The working principles and structural parameters of the furrow opening components,the seeding apparatus and the soil covering-pressing device are described.The mechanical model of the key components of the seeding unit was established,and the forward speed,roller diameter and compacting strength were selected as the test factors.A three-factor,five-level quadratic rotation orthogonal combination test was conducted with the seed breakage rate,seeding depth qualification rate,seeding uniformity coefficient of variation and hole grain count qualification rate as the evaluation indexes.Field performance test and test results show that:at a forward speed of 4 km/h,a roller diameter of 427 mm and a compacting strength of 48.45 kPa,the seed breakage rate was 1.31%,the sowing depth qualification rate was 9.95%,the coefficient of variation of sowing uniformity was 3.75%and the number of holes was 86.75%.This accords with the agronomic requirements of dry-directseeding for rice and implements a combination of superior agronomy and modern farm machinery.

Tianjin Automotive Test Center & National Passenger Car Quality Supervision and Inspection Center——A State Testing and Universality Techniques Research Base in China

Tianiin Automotive Test Center has a test capability as well as a capability of conducting universality techniques research. With fixed assets of around RMB 76.44 million yuan and an architectural area of 11,200 sqm, test labs mainly include: auto emission test lab, full-scale vehicle crash test lab, auto safety test lab, auto lighting and view field test lab, engine test lab,