The Monte Carlo simulation of J/ψ→γη_c→γ$\phi$$\phi$ is performed at the BES III offline software system. The final states of the decay channel are selected by comparing the inclusive Monte Carlo with the exclusive Monte Carlo,and the efficiency is 1.5 times as that of BES II. The branching fraction of η_c→$\phi$$\phi$ obtained by this method is consistent with the input value of Monte Carlo within the statistical errors. 2 144±26 events number of η_c→$\phi$$\phi$ can be obtained when applying the procedure of the paper to the J/ψ data sample collected at BES III. A method of Helicity is used to calculate the angular distribution of all the particles in their mother frame,and the results are consistent with the fitting results of the exclusive Monte Carlo sample within the statistical errors. The result of this paper is meaningful for the high precision measurement of the channel and the data analysis at BES III experiment.

In this paper, two narrowband low-noise amplifiers (LNAs) are designed, which can operate in the 2.4 GHz frequency with TSMC 0.18 μm CMOS technology. One of the circuit structures is Cascode structure with current-reuse technique,and the other is folded Cascode structure with forward-body-bias technique. The simulation results of the designed narrowband LNAs show that,in the 2.4 GHz frequency,Cascode LNA consumes 4.9 mW from a 1.5 V DC supply,gain is 23.5 dB,input and output reflection coefficients are -16.9 dB and -16.3 dB,noise figure is 0.72 dB and IIP3 is 3.12 dBm; and the folded Cascode LNA can operate under 0.5 V DC supply,power consumption is 1.83 mW,gain is 23.8 dB,input and output reflection coefficients are -28.2 dB and -24.8 dB,noise figure is 0.62 dB and IIP3 is -7.65 dBm, which is suitable for low voltage and low power applications.

The propagation characteristics of the two pieces of information are studied respectively on the GBBV weighted network and a real data set. Assuming that the spread rates of the two pieces of information are the same,the attractiveness of the information itself is different from each other,in which the attractiveness of information 1 is relative high,and the attractiveness of information 2 is relative low,study shows that when the average degree of a network is 6 to 8,the spread range of the low attractiveness information 2 is relative small. When the average degree of the network is less than 8,the spread range of the information 2 increases with the increase of the average weight of the network. This paper puts forward several methods to improve the propagation range of information 2 by increasing the number of its initial propagation source,and then compares the results of these methods. It is found that the effect of increasing the initial propagation nodes by descending degree is notable in sparse networks,and the propagation range of information 2 will exceed information 1 by only adding a small amount of initial propagation nodes.

References found that the fixed step size is used to stabilize the focusing process. However, it is difficult to be used for the practical requirements of the system due to the longer focusing time and low efficiency. In addition, amongthe existing variable step size focus search algorithms, the existing variable step size adjustment focus search algorithm has quite complex calculation formula derivation process and the computation of the algorithm is very difficult. Therefore, in the actual applications which require rapid focus, the existing algorithm is rarely used. In order to realize the fast focusing, the process of the derivation of the focusing algorithm needs to be simpleand the algorithm calculation should be simple so that the algorithm can be applied to the system of fast focusing. In this paper, the variable step size focus search algorithm is studied, and a new adaptive variable step size algorithm based on image processing is proposed. The strategy of the new algorithm is: the coarse focusing is obtained by increasing the focus step when the the system consists of a straight line of the clarity evaluation function of any two points far away from the best focusing position; a fine focusing is realized by decreasing the focus step by nearby the peak of focusing curve;finally, the variable step size, fixed step size and variable step size search algorithm based on image processing are used to automatically focus the different definition evaluation functions. Experimental results show that, in this paper, the proposed variable step size search algorithm can ensure the accuracy of the focus, can achieve rapid focus for domain definition of the evaluation function, and the adaptive variable step size search algorithm based on image processing has the advantages of shorter focusing time, less computation and so on.

Reflection removal of single image is a very meaningful issue in the area of computer vision. An improved method is proposed to overcome the weakness that single image reflection removal with defocus blur algorithm can not remove the reflection in the local area where the assumption that two layers have different smoothness is violated.By including correction mechanism and adaptive efforts to reflection,the improved algorithm can effectively eliminate color distortion of the image. With tests of natural scene and artificially synthesized images with reflected light,the results show that,compared with the original method,the improved method more effectively removes reflect light and enhances the robustness.

The value of k is usually fixed in the issue of k Nearest Neighbors (kNN) classification. In addition, there may be noise in train samples which affect the results of classification. To solve these two problems, a sparse-based k Nearest Neighbors (kNN) classification method is proposed in this paper. Specifically, the proposed method reconstructs each test sample by the training data. During the reconstruction process,l₁-norm is used to generate the sparsity and different k values are used for different test samples, which solves the issue of fixed value of k. And l₂₁-norm is used to generate row sparsity which can remove noisy training samples. The experimental results on UCI datasets show that the proposed method outperforms the existing kNN classification method in terms of classification performance.

Dispatch reliability is the key parameters reflecting the overall reliability of a civil aircraft, and the important technical parameters affecting the original design of a civil aircraft. According to the actual delay rate data of airlines, combined with the mathematical relationship between delay rate and dispatch reliability, from the perspective of civil aircraft design, seven design parameters at the aircraft early design phase are put forward in this paper, the correlation analysis between the delay rate and design parameters is made, the first three design parameters which have the maximum correlation are obtained. Also this paper, a multiple regression model between dispatch reliability and aircraft original design parameters is established. Based on this model, the dispatch reliability of civil aircraft can be predicted. An empirical study with A320 and C919 shows that the prediction model is reasonable and has higher precision accuracy, which may lay the theoretical basis and data support for dispatch reliability prediction of the civil aircraft in China, meanwhile the prediction model of dispatch reliability can provide reference data for the structure design of civil aircraft.

Let Z[i]be the ring of Gaussian integers, γ∈Z[i]. Let 〈γ〉 denote the ideal of Z[i] generated by γ. The cubic mapping graph G(γ) over the quotient ring Z[i]/〈γ〉 is a digraph,where the vertices of G(γ) are the elements of Z[i]/〈γ〉, and there is a directed edge from α to β if β=α³. In this paper, the structure of G(γ) is investigated. The numbers of the fixed points and the in-degree of the vertices 0 and 1 are obtained. Moreover, the semiregularity of the graph G(γ) is characterized. Finally,the height in G(γ) of an arbitrary zero-divisor is determined.

Optical orthogonal code (1-D OOC) is the basis of optical code-division multiple access system. Two-dimensional OOC (2-D OOC) has better performance than that of the 1-D OOC. Existing constructions of 2-D variable-weight OOC are rarely seen. In this paper,by using skew starters,two new classes of two-dimensional variable-weight OOC ((6×v),{3,4},1,(4/5,1/5))-OOCs and (6×v,{3,4},1,(2/3,1/3))-OOCs are constructed. The (6×v,{3,4},1,(4/5,1/5)-OOCs are optimal. (6×v,{3,4},1,(2/3,1/3))-OOCs fails to be optimal by missing three codewords (two of weight 3 and one of weight 4) compared to the theoretical upper bound.

In this paper, a dependent multi-type risk process with a PH claim distribution in a stochastic environment is proposed. Using Asmussen’s method, this risk process is transformed into stochastic fluid queues (SFQ). By the theory of the SFQ, the Laplace-stieltjes transform (LST) of the ruin time, the ultimate ruin, and the distribution of the deficit are obtained. Finally, a numerical example is given to illustrate the theoretical results.

The pricing of interest rate derivatives is considered under an affine jump diffusion model. Using the Fourier transform method and the forward measure change technique,the closed explicit formulas for both the price of the default-free,zero-coupon bond and the value of the European options on the default-free,zero-coupon bond are obtained. Furthermore,pricing problems on both the European option on the coupon bond and the interest rate options are extended in this model by applying these explicit formulas above. Finally,the impacts of the key parameters in this model on prices for both the bond and bond option,and implied volatilities of bond options are analyzed by numerical examples,respectively. Numerical results show that the jump risks have more remarkable effects on the interest rate derivative prices and implied volatility,which show that the affine jump diffusion term structure model of the interest rate fits reality well.

Nine stable configurations were gained after a series of cluster CoFe₂B₂ models were optimized and calculated under the Becke3LYP/Lanl2dz level by using density functional theory (DFT) method. Isomerization reactions of those stable configurations were studied from thermodynamics and dynamics. A logarithmic equation is proposed to predict the limit of isomerization reaction, namely lnK=0.391 9ΔE+0.435 7; most of stable configurations were converted to configuration 2⁽²⁾ through one or more doors and the isomerization reaction of configurations 1⁽⁴⁾/2⁽⁴⁾ is reversible; there is no isomerization of configuration 1⁽²⁾ taking place, and the final existence of cluster CoFe₂B₂ are configurations 1⁽²⁾ 2⁽²⁾ 1⁽⁴⁾ 2⁽⁴⁾, namely capped triangular and quadrangular pyramid structures.

Nano-grained (NG) alloy was obtained through symmetric and asymmetric rolling at room temperature.The effects of annealing on microstructure and mechanical properties of nano-grained Ni-based alloy were investigated. It was found that, after severe cold rolling, the NG material with an average grain size about 50 nm and (2 2 0) preferential orientation was fabricated. In addition, after annealing at 700 ℃, the grain size was about 150 nm and it was still below 250 nm even after annealing at 800℃, which shows that the nano-grained material has high thermal stability and is attributed to precipitation of γ′ phase.

The antitumor effects of a novel 1,8-naphthalate formyl imide derivative NA-17 in human liver cancer cells was researched. The inhibition effects of NA-17 in various human cancer cell lines showed that NA-17 exhibited highly selective inhibition in human liver cancer cell line HepG2, but with low toxicity to normal hepatic cell HL-7702. Preliminary research indicated that NA-17 induced apoptosis to suppress proliferation in HepG2 cells. Further studies showed that NA-17 induced the increase in the levels of Bak, while the decrease in Bcl-2 and Bcl-xL to trigger cell apoptosis.

30 kinds of pesticide residues in wampee were determined rapidly by the method of QuEChERS-LC-MS/MS. In this method, the pesticide residues were extracted from the fruits of Chinese Wampee by shaking with acetonitrile firstly, and then purified by PSA and anhydrous MgSO₄, finally the sample solvents were detected by LC-MS/MS. The results showed: the average recovery of 30 pesticides ranged from 56.3% to 109% in the spiked level of 5, 10, 20 μg/kg, with relative standard deviation from 1.0% to 10.7%, and the correlation coefficient of the linear equation can reach 0.996 7 to 0.999 9. This method is simple but with low cost and high efficiency, and can provide reference for multiple pesticides residue in wampee detection tests.

Applied talents play indispensable roles in social and economic development. Firstly, the internal relationship between the intension of chemistry experimental skills competition and the applied talents training are discussed from the perspectives of cultivating applied talents, combined with college students’ chemistry experimental skills competition of colleges and universities in Guangxi province. Then, the relationship between chemistry experimental skills competition and the applied talents training is discussed from two aspects: promoting the development of the cultivation of chemical applied talents and providing effective support for the competition of cultivation of chemical applied talents. Finally, effective measures for cultivating applied talents are discussed from the following aspects in order to provide new ideas for promoting the training of chemical talents in Guangxi province, such as, improving the training system of applied talents, promoting the reform of discipline construction, improving the curriculum of applied talents training, constructing of diversified practice platform for application-oriented personnel training, and optimizing the construction of teaching staff.

9 human group genetic characteristics of head-face of 546 middle school students (278 males and 268 females) of Lingao in Hainan province. The results are as follows:(1) There is a significantly sex difference on nasal frofile and hair point of the forehead, the remaining 7 characters have no significant difference; (2) Comparing with the 14 other ethnic groups in China, Lingao has a higher frequency of eyefold of the upper eyelid, shovelshaped front tooth, non-projecting nasal profile and wide nostril. The mongoloid fold, forehead hair point and straight hair are of middle level. The percentage of protruding chin and ear lobe appearance has a lower level. (3) The results of cluster analysis show that the 9 human group genetics characteristics has the characteristics of southern ethnic group, and closest to the Han of Hainan.

The results of transmission electron microscope tests of the negative staining specimens of plant endophyte were comparatively studied to explore the ideal preparation methods of transmission microscope negative staining specimens of plant endophyte. Firstly, four methods were used to prepare endophyte suspension, such as direct scraping, double distilled water flushing, double distilled water flushing followed by centrifugal separation and re-suspension and double distilled water flushing followed by static placing. Then, 10 g/L phosphotungstic acid was applied for floating negative staining and the transmission electron microscope test was carried out. And finally, the morphological characteristics, the shape and the quantity of the pilus and the flagellum of the endophyte were used as indicators to assess the advantages and disadvantages of these extracting and processing methods. Results: (1) The original state of the direct scraping sample is better, but the background is heavy, and the surface of the cell is affected easily by impurities. (2) The sample background of the double distilled water flushing is better. (3) The sample of the double distilled water flushing followed by centrifugal separation and re-suspension, and the sample of the double distilled water flushing followed by static placing have a clear vision, uniform distribution, clean background and less impurity under the transmission electron microscope. But the morphology structure of endouphyte of the former one was more easily affected. Transmission electron microscopy is an important tool for endophyte research. However, it is necessary to choose sample processing methods based on the actual situation. Under strict control of the static time, double distilled water flushing followed by static placing with the negative staining technique can achieve better test results.

In this study, the transcriptome of the self-pollinated styles and cross-pollinated styles of Citrus grandis var. Shatinyu Hort were sequenced by high-throughput sequencing technology. WRKY transcription factor gene of Citrus grandis var. Shatinyu Hort was obtained through variance analysis method. It is 1 178 bp in length with an open reading frame (ORF) of 993 bp, encoding 330 amino acids with deduced molecular weight of 37.00 ku, and theoretical pI value of 5.79. Compared with un-pollinated styles, the expression (RPKM) of WRKY transcription factor gene is respectively 5.67, 26.04 and 17.08 in 1, 2, 3 days cross-pollinated styles, and expression (RPKM) of the gene is respectively 15.67, 14.96 and 3.89 in 1, 2, 3 days self-pollinated styles. The homology analysis of amino acid sequence indicated that the WRKY transcription factor protein shared higher homology with that of Citrus sinensis (98%) and Citrus japonica (97%). Phylogenetic analysis revealed that WRKY transcription factor gene showed closer kinship with that of Citrus sinensis and Citrus_japonica,indicating that they belong to the same evolutionary branch.

Camellia flavida, one of the Camellia species with yellow flower, is an ornamental species. The age structure, spatial pattern and spatial correlation between three life stages of C. flavida using g(r) function were studied within NG (300 m×500 m) and CS (100 m×100 m) plots in Nonggang National Nature Reserve. The results showed that the age structure of C. flavida was approximately normal distribution and approximately inverted “J” type in NG plot in CS plot, respectively. The aggregated distribution spatial pattern of C. flavida was 24 m and 35 m in the NG plot and CS plot, respectively. Besides, the degree of aggregation in NG plot was significantly larger than the latter. The spatial correlation between three life stages of C. flavida was similar in the same plot and significantly positive correlated within 24 m in two plots.

In order to explore the best cutting propagation method of Brasenia schreberi, orthogonal design is adopted to study the effect of Brasenia cutting survival factors and the best way to cutting from the factors such as water depth, cutting area and cutting way. The results show that Brasenia schreberi grows the best by using the middle of the branches cuttings, water depth of 8 cm and cuttings way for flat insert. After one month, the survival rate is 70%, the average growth rate of stem is 0.14 cm/d, the number of new leaves is 20 tablets/plants and the new leaves area is 119.10 cm².

The global change caused by human activities has become a hot research issue in the world, at the same time, the ecological security problems caused by human activities have attracted great attention from scholars of all circles. As a key research focus, great concerns have also been showed to the ecological security of the Three Gorges Reservoir Area. Based on the comprehensive evaluation of ecological security in the Three Gorges Reservoir area, the follow-up development bottleneck of ecological security of the Three Gorges Reservoir area and the existing problems are analyzed to determine the stress factor from three aspects of nature, society and economy. A system dynamic model was established based on the Vensim software platform for the subsequent development of ecological safety of the Three Gorges Reservoir. After the model test, a dynamic simulation on future development of the ecological safety of the Three Gorges reservoir is carried out. Based on the feedback relationship and simulation results, the stress mechanism of subsequent development of ecological security of the Three Gorges Reservoir area are analyzed, which will lay a foundation for subsequent development evaluation and early warning of ecological security of the Three Gorges Reservoir area.