Abstract:
It is of great significance to automatically generate code from structured flowchart. There are some deficiencies in existing researches, and their key algorithms and technologies are not elaborated, also there are very few full-featured integrated development platforms that can generate code automatically based on structured flowchart. By analyzing the characteristics of structured flowchart, a structure identification algorithm for structured flowchart is put forward. The correctness of algorithm is verified by enumeration iteration. Then taking the identified flowchart as input, an automatic code generation algorithm is proposed. Also the correctness is verified by enumeration iteration. Finally an integrated development platform is developed using those algorithms, including flowchart modeling, code automatic generation, CDT\GCC\GDB etc. The correctness and effectiveness of algorithms proposed are verified through practical operations.

Abstract:
In the title compound, C18H26N2O6S2, all bond lengths and angles are normal. The crystal structure is stabilized by intermolecular N—H...O hydrogen bonds.

Abstract:
In the title compound, C9H13ClN6O2S, all bond lengths and angles are normal. The 1,3,5-triazine ring exhibits a half-chair conformation. In the crystal structure, weak intermolecular C—H...N and C—H...O hydrogen bonds link the molecules into layers parallel to the bc plane.

Abstract:
Bird-aircraft collisions (birdstrikes) pose a major threat to aviation safety worldwide. The bird distribution at the airfield of Huanghua International Airport in Changsha, Hunan Province, China, was investigated between December of 2006 and December of 2008, to study birdstrike avoidance and aviation safety. A total of 60 bird species was found and their risks were assessed by a birdstrike ranking assessment system. The highest-risk species were Barn swallow (Hirundo rustica), Red-rumped swallow (H. daurica), Grey-headed lapwing (Vanellus cinereus), Pintail snipe (Gallinago stenura), Oriental skylark (Alauda gulgula), Little egret (Egretta garzetta), and Eurasian woodcock (Scolopax rusticola), whereas the lowest-risk species were Black-capped kingfisher (Halcyon pileata) and White-throated kingfisher (H. smyrnensis). Through a hierarchical cluster analysis, all species were classified as four groups: (1) the extremely high-risk group with a risk level between 84% and 100%, which includes bird species ranked from the 1st to the 16th, and is the priori group in birdstrike prevention; (2) the high-risk group with a risk level between 71% and 81%, which includes bird species ranked from the 17th to the 28th, and is the sub-prior group in birdstrikes; (3) the sub-high-risk group with a risk level between 60% and 69%, which includes bird species ranked from the 29th to the 43rd, and is the concern group in birdstrike prevention; (4) the low-risk group with a risk level between 60% and 69%, which includes bird species ranked from the 44th to the 60th, and is the negligible group in birdstrike prevention. Finally, the first 16 bird species with high-risk values, which are the main focus of birdstrike prevention, were categorized as six prevention groups by a hierarchical cluster analysis. Therefore, this study provides targeted implementations for birdstrike prevention at Huanghua International Airport, Changsha.

Abstract:
Water level, an important hydrological factor in shallow lake, has great influence on hydrodynamics, ecological and chemical processes. Based on the field observations from 2007 to 2008, the seasonal change of water level and water environmental factors in Hukou area of Poyang Lake were analyzed. Meanwhile, the relation regression equations between water level and water environmental factors were established. The analysis demonstrated that all the parameters showed an obvious seasonal change. The relationship between water of Poyang Lake (Hukou Station) and that of Yangtze River (Jiujiang Station) was positive and linear. The changes in water level were found to have a significant influence on the water environmental factors in Hukou area of Poyang Lake. With increases of water level, the transparency increased accordingly, but the permanganate index and the concentrations of suspended matter, dissolved oxygen, nitride and phosphide declined accordingly.

Abstract:
TiB2/TiC composites were in situ fabricated through spark plasma sintering (SPS) technique using Ti and B4C powders as starting materials. The phase constituent of the samples was analyzed by X-ray diffraction techniques and microstructures were observed by scanning electron microscope. The Vickers hardness, fracture toughness and MSP strength at room temperature was measured by indentation method and Modified Small Punch (MSP) test. The results showed that the TiB2/TiC composite fabricated by one-step sintering (sintering at 1550 or 6 min) has an average grain size greater than 1 μm with MSP strength of 844 MPa. While the TiB2/TiC composite with an average grain size of about 200 nm could be fabricated by two-step sintering (at higher sintering temperature of 1550 nd lower holding temperature of 1450 and its MSP strength reached as high as 1095 MPa.

Abstract:
Compared with flowchart, problem analysis diagram (PAD) can not only be used to describe the sequence of program but also the hierarchy structure. It is of great significance to automatically convert flowchart to PAD for generation of codes. There are some deficiencies in existing researches, and their key algorithms and technologies are not elaborated. By analyzing the characteristics of PAD and structured flowchart, a coding strategy is proposed, and a structure identification and coding algorithm are put forward for structured flow diagram and PAD. Based on the coding strategy a transformation algorithm which can transform flowchart into a semantically equivalent PAD is proposed. Then by using recursive algorithm the specific language code are generated from PAD. Finally a integrated development platform is developed using such algorithms, including flowchart modeling, code automatic generation, and CDTGCCGDB. The correctness and effectiveness of coding strategy and algorithm, the structural transformation from flowchart to PAD, and automatic generation of codes based on PAD have been verified through practical operations.

Abstract:
This paper is concerned with the existence of nonoscillatory solutions for the nonlinear dynamic equation on time scales. By making use of the generalized Riccati transformation technique, we establish some necessary and sufficient criteria to guarantee the existence. The last examples show that our results can be applied on the differential equations, the difference equations, and the -difference equations. 1. Introduction In the recent decade there have been many literatures to study the oscillatory properties for second-order dynamic equations on time scales; see, for example, [1–11] and the references therein. In particular, the dynamic equation of the form has been attracting one’s interesting; see, for example, [3, 5, 8]. Motivated by the papers mentioned as above, in this paper we consider the existence of nonoscillatory solutions for nonlinear dynamic equation on a time scale , where . Referring to [12, 13], a time scale can be defined as an arbitrary nonempty subset of the set of real numbers, with the properties that every Cauchy sequence in converges to a point of with the possible exception of Cauchy sequences which converge to a finite infimum or finite supremum of . On any time scale , the forward and backward jump operators are defined, respectively, by where and . A point is said to be right-scattered if , right-dense if , left-scattered if , and left-dense if . A derived set from is defined as follows: when has a left-scattered maximum , otherwise . Definition 1.1. For a function and , we define the delta-derivative of to be the number (provided it exists) with the property that, for any , there is a neighborhood of (i.e., for some ) such that We say that is delta-differentiable (or in short: differentiable) on provided exists for all . For two differentiable functions and at with , it holds that Definition 1.2. A function is called an antiderivative of provided holds for all . By the antiderivative, the Cauchy integral of is defined as , and . Definition 1.3. Let be a function, where is called right-dense continuous (rd-continuous) if it is right continuous at right-dense points in and its left-sided limits exist (finite) at left-dense points in . To distinguish from the traditional interval in , we define the interval in by Let (or ) denote the set of all rd-continuous functions defined on , and (or ) denote the set of all differentiable functions whose derivative is rd-continuous. Since we are interested in the existence of nonoscillatory solutions of (1.2), we make the blanket assumption that and . As defined in [1], by a solution

Abstract:
The left-right polarization-dependent asymmetry of the weak interaction mass is investigated. Based on the Standard Model, the calculation shows that the weak interaction mass of left-handed polarized fermions is always greater than that of right-handed polarized fermions in flight with the same velocity in any inertial frame. The asymmetry of the weak interaction mass might be very important to the investigation of neutrino mass and would have an important significance for understanding the parity nonconservation in weak interactions.