To solve the specific problem in KBQA, a question answering system is built based on large scale Chinese knowledge base. This system consists of three main steps: recognition of named entity in question, mapping from question to property in KB, and answering selection. Alias dictionary and LSTM language model are used to recognize named entity contained in question, and two different attention mechanisms are combined with bidirectional LSTM for question-property mapping. Finally, exploit results of first two steps are exploited for entity disambiguation and answering selection. The average F1 value of proposed system in NLPCC-ICCPOL 2016 KBQA task is 0.8106, which is competitive with the best result.

The authors studied the spatial distribution of built-up area for 5 major cities in the Pearl River Delta Region in recent 40 years, based on multi-source and long-series satellite images and GIS technique, and the 5 major cities are: Guangzhou, Shenzhen, Zhuhai, Hong Kong and Macao. Spatial-temporal dynamic characteristics and driving factors for the built-up sprawl are analyzed. The speed of built-up sprawl for the 5 major cities overall is relatively faster in the 8th “5 Year Plan” period (1991–1995) and the 10th “5 Year Plan” period (2001–2005). The spatial pattern of Guangzhou and Shenzhen’s built-up characterizes with axial and zonal group, while for Zhuhai, Hong Kong, Macao are abundant of islands, the built-up is sprawled by leaps and forms multi urban centers. Urban expansion in the Pearl River Delta Region has the largest influence on farmland, followed by the forestland, and again the construction land for rural residential or industrial use. Because of reclamation projection, the sea area supplies more land resource for built-up expansion in Hong Kong and Macao. Terrain conditions, transportation development, policy making, population and economic growth are important driving factors for urban expansion in the Pearl River Delta Region. The sequence of built-up area’s expansion ratio is coincidence with the population increase rate and GDP increase rate for the 5 major cities, of which the values of Shenzhen are the largest of all, and then followed by values of Zhuhai, Guangzhou, Macao, and Hong Kong in sequence.

A baseband transmitter for UHF (ultra high frequency) RFID (radio frequency identification) reader is proposed, which supports ISO 18000-6B&6C protocol and works at 840-960 MHz. Taking security and compatibility into consideration, 2-bits PIE-kind encoder and PIE encoder are both implemented, the former is 6 times higher security than the later. In SSB modulation, when there is amplitude mismatch of two quadrature signals, it will generate two frequency bands and result in performance lost. For this problem, an amplitude matching module is integrated. A power adjustment module in baseband is also proposed to enhance the signal and get larger input signal for PA to generate larger PA output power. The whole reader chip is implemented in a 0.18μm CMOS process and consumes 209461 gates and 102.609 mW. The baseband transmitter takes up 22% of the total area. This novel architecture doesn’t bring much lost in area and power consumption compared with other existing designs.

The micro-meteorological elements of an advection fog, which occurred in Feb 2006, were analyzed by using data from the Tianjin Meteorological Boundary Layer Tower The results show that temperature inversion and higher humidity are due to the warm and moist south-west advection, which provides the necessary conditions for the formation and maintaining of the advection fog The advection fog comes under the weak unstable condition There are double-inverse temperatures during the fog period with wind speed decreasing and wind direction shearing The fog dissipates from higher to lower layers with dry and cold air coming from the northwest associated with a cold front The long-lasting fog at lower layers is due to the subsidence inverse of cold air There is a close correlation between the characteristics of temperature profile and thickness of fog

Collisinal Rayleigh-Tailor instability in the ionospheric F region of low and mid-latitudes is discussed. Emphasis is put on the effects of thebackground neutral wind to the growth rate of the instability. A set of equations governing the R-T instability in this region is established with electric field and neutral wind included and the linear growth rate is deduced. The results show that the growth rate decreases as increasing latitude. For latitudes higher than 30 degree, normal neutral wind alone can no longer make the growth rate keeping positive values even under most favorable conditions, unless there is an eastward electric field. This indicates that the electric field may take an important role in local R-T instability evolution in mid-latitudes. Seasonal variations of the growth rate is also discussed using certain electron density profile model.

A new biotin derivative was systhesized by conjugatingN, N'-biscysteinyl-lysine(BCL) to biocytin. The conditions of conjugationwas studied BCL-biocytine was labeled with Tc-99m. The labels was identified by TLC, GC and bonding with avidin. The biodistribution of the labels in normal mice was also investigated. The stability of Tc-99m-BCL-biocytine both in vitro and in vivo suggested that the labels may be further used in pretargeting.