南京市浦口区“三农”现状及对策建议

近年来,随着现代农业和社会主义新农村的快速推进,农业和农村经济进入了新的发展阶段,农业在促进区域经济的增长中发挥了重要作用。该文介绍了对浦口区农业、农村、农民等"三农"工作的现状、问题,并提出对策建议。主要包括:大力发展新兴产业,拉动区域发展增收,深化农村配套改革,挖掘农村土地资源增值潜力;以帮扶攻坚为抓手,促进低收入农民增收等。

Optimal control strategy of institutional investor's execution cost

Optimal control of multi-assets liquidation in view of volatility risk was studied. The analytical solution of optimal strategy was achieved with the calculus of variation. Numerical examples and graphical illustrations were also given. The conclusion shows that the optimal strategy is the linear combination of time's hyperbolic sine and hyperbolic cosine. The investor's attitude towards risk can influence the optimal strategy. In order to avoid the uncertainty of the execution cost, the investor with high risk aversion liquidates assets rapidly in the early period. The decrease of liquidation loss is at the cost of the increase of the volatility level.

The Development Status quo and Strategy of Aquatic Vegetables in Hunan

This paper reviews the development of aquatic vegetable production and research in Hunan. The advantages of aquatic vegetable industry in Hunan are discussed in detail on its location, brand, market, planting and processing. And the development strategies of the above-mentioned industry are further analyzed in the paper, such as variety resources, breeding and industrialization.

Analysis of the Evolutionary Significance of Heterosis——taking the contribution of fitness to the genetic diversity in random mating population as an example

Upon the analogy of definition of heterosis and inbreeding depresstion in terms of population genetics, the heterosis is thought to be evaluated overall with fitness. By establishing a mathematical model, the equilibrium status of three genotypes of random mating population （i. e. RR, Rr and rr） under different fitness, which exposes that heterosis is the precondition for multiallele to exist in the population. The heterosis protects the genetic diversity and makes the population owning a stronger self-control and evolution potential by improving the hetemzygote＇s fithess so as not to wash out different types of genes. It deepens Darwin＇s thoughts of individual section by making the individual fitness consonant with population fitness.

Performance and Cultivation Techniques of a Promising Super Hybrid Rice Combination Chaoyou 1000 in High-latitude Area

The performance and cultivation techniques of Chaoyou 1000 in Junan County, Shandong Province were summed up.

Relationship Between Differential Gene Expression and Heterosis During Ear Development in Maize (Zea mays L.)

Maize （Zea raays L.） is one of the most important crops because of the remarkable properties of its hybrid, which is responsible for the high commercial value of hybrid maize. The genetic basis of heterosis （hybrid vigor） is not well understood. A differential display technique was performed to identify genes with differential expression across twelve maize inbred lines and thirty-three hybrids during ear development. An incomplete diallel design was used to investigate the relationship between the global framework of differential gene expression and heterosis. It was found that the genes belonging to MONO pattern （i.e., genes expressed in both parental lines and in hybrid） was the highest in percentage among the total five patterns and illustrated that the properties of differentially expressed genes are not entirely responsible for heterosis. Furthermore,a larger number of differentially expressed genes in hybrid, which serves as a major reservoir for generating novel phenotypes that exhibit heterosis of certain agronomic traits during early development and differentiation of maize ear. Moreover, there were some silent genesin hybrids that are responsible for the arrest or abortion of spikelets and for the increase in kernels weight.

Optimal control of natural resources in mining industry

The paper focuses on the optimal control of natural resources in mining industry. The purpose is to pro- pose an optimal extraction series of these resources during the lifetime of the Mine＇s maintenance. Fol- lowing the proposed optimal control model, a sensitivity analysis has been performed that includes the interest rate impact on the optimal solution. This study shows that the increasing of the interest rate sti- mulates faster extraction of the resources. The discounting factor induces that the resource has to be extracted faster hut this effect is counterbalanced by the diminishing returns of the annual cash flow. At higher parameters of ＂alpha＂ close to one of the power function about 80% from the whole resource will be extracted during the first 4 years of object/mine maintenance. An existence of unique positive root with respect to return of investment has been proposed and proved by two ways： by the ＂method of chords＂ and by using specialized software.

Determining Bookkeeping Cash Maximum of Serbian Army Units by Using Multicriteria Optimization

Normal practice of financial management in the defense system is crucial for the performance of assigned tasks. Payment transactions in cash, in addition to non-cash payment system are very important if we take into account the specificity of the defense system. With limited financial resources optimization level of bookkeeping cash limit should provide continuous funding of units and institutions of the defense system. The aim of this paper is to show that using the method of analytic hierarchy process （AHP） we can help optimize the allocation of cash financial funds within the defense system.

Virtual reality approach for 3D large model browsing on web site

Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator’s Garden. Translating building data to the Virtual Reality Modeling Language (VRML) is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-of- detail switching.

Optimal design of vegetation in residential district with numerical simulation and field experiment

Vegetation plays a key role in improving wind environment of residential districts,and is helpful for creating a comfortable and beautiful living environment.The optimal design of vegetation for wind environment improvement in winter was investigated by carrying out field experiments in Heqingyuan residential area in Beijing,and after that,numerical simulation with SPOTE(simulation platform for outdoor thermal environment) experiments for outdoor thermal environment of vegetation was adopted for comparison.The conclusions were summarized as follows:1) By comparing the experimental data with simulation results,it could be concluded that the wind field simulated was consistent with the actual wind field,and the flow distribution impacted by vegetation could be accurately reflected;2) The wind velocity with vegetation was lower than that without vegetation,and the wind velocity was reduced by 46%;3) By adjusting arrangement and types of vegetation in the regions with excessively large wind velocity,the pedestrian-level wind velocity could be obviously improved through the simulation and comparison.

Construction of Agricultural Information Service System in China——under the Eyeshot of Communication Science

The paper aims to study the current communication condition,configuration,characteristic and regulation of Chinese agricultural information in terms of the eyeshot of communication studies,and provide reference to build Chinese agricultural information service system based on the analysis of their advantages and disadvantages.

Performance and Matching Cultivation Techniques of New Late Rice Variety Xiangyou196 with Early Maturity and High Yield

In this paper, the characteristics and yield performance of new variety Xi-angyou196 were introduced, and its high-yielding cuItivation techniques were summa-rized, finally, the corresponding matching cuItivation techniques through experiment and demonstration were put forward.

Competitiveness of Egyptian cotton exports in the international market

Cotton plays a vital role in the Egyptian economy by meeting domestic and export demands,contributing significantly to agriculture,industry,export earnings,and providing a cash income to roughly one million small farmers.This paper examines the competitiveness of Egyptian cotton exports(ECE) in the international market during the period 1990-2006.It mainly aims at investigating the trends in cotton exports over the studied period,analyzing the competitive position of Egyptian cotton by employing several economic and trade indices,and identifying the key factors that influence Egypt's cotton exports to the world.The results revealed that the total quantity of ECE has fallen from 196.8 thousand tons in 2003 to 87.2 thousand tons in 2006.It also shows a high degree of geographic concentration of ECE,into India,Italy,the Republic of Korea,and Japan.Together,these markets imported about 50%of ECE during 1990-2006.The competitive advantage of Egyptian cotton would appear dependent on quality not price.Japan,the Republic of Korea and Italy presented the most stable markets for ECE.Linear regression analysis suggests that a one percent increase in the Egypt-to-USA export price ratio leads to a decrease in ECE by about 27.8 thousand tons.Such analysis has also shown a positive and significant effect of the World Trade Organization on ECE.

Performance and High-Yield Cultural Techniques of Two-Line Hybrid Rice Xinlingyou998 at Direct Seeding Cultivation

Xinliangyou 998 is a new indica two-line hybrid rice variety using Xin＇er Sx H0998 as parent. The variety was introduced and demonstrated in Yingshan County in 2016, and showed intermediate growth duration, strong tillering ability, firm culm, tolerance to high fertility and resistance to lodging, tolerance to high tempera- ture and wide range of adaptation, etc. The high-yield cultural techniques were con- cluded.

Fuzzy Logic Based Approach in an Enterprise Resource Planning System for Hydraulic Cylinders Assembly

Trends in modern industry show a tendency towards demassovization of production as a response to the customers＇ specific needs for unique and personalized products. This provokes significant changes in the processes of manufacturing, assembly, and testing The cost of such a type of production can be reduced by employing highly productive reconfigurable equipment with proper software to enable optimization. This paper presents a decision support extension for directing of hydraulic cylinders to assembly-testing lines using fuzzy logic in the Enterprise Resource Planning system of a small size production in a factory in Bulgaria. Different assembly-testing lines are flexibly assigned to the specific cylinder＇s parameters by the developed fuzzy system on the basis of the overlapping of parameters in the hydraulic cylinders classification. The final decision on the line assigned in case of alternatives is made through accounting for the minimal cylinder delay time. The effectiveness of the approach is assessed by simulation. It leads to an increase of the efficiency of the assembly-testing flow lines, a reduction of the time needed for hydraulic cylinders assembling and testing and balanced loading of the modules.

NEW METHOD OF MINING INCOMPLETE DATA

The data used in the process of knowledge discovery often includes noise and incomplete information. The boundaries of different classes of these data are blur and unobvious. When these data are clustered or classified, we often get the coverings instead of the partitions, and it usually makes our information system insecure. In this paper, optimal partitioning of incomplete data is researched. Firstly, the relationship of set cover and set partition is discussed, and the distance between set cover and set partition is defined. Secondly, the optimal partitioning of given cover is researched by the combing and parting method, acquiring the optimal partition from three different partitions set family is discussed. Finally, the corresponding optimal algorithm is given. The real wireless signals offten contain a lot of noise, and there are many errors in boundaries when these data is clustered based on the tradional method. In our experimant, the proposed method improves correct rate greatly, and the experimental results demonstrate the method's validity.

BP＇ s Performance Management System Optimization Design

Performance management as the core part of modem human resources management, is to ensure that the employee＇s work and the organization＇s strategic objectives to maintain consistent process. Performance management by setting a scientific and rational organizational goals, departmental goals and individual goals for employees specified in the direction Managers to discover the work of subordinates through performance coaching communication problems exist, to provide guidance and resources to support the necessary work to subordinates, subordinates bv improving, work attitude and workin~ melhnd~ tn en^Hre~ tho renl^v~fltan nfn^r~＂ I-,;~.~;

Trinomial tree model of the real options approach used in mining investment price forecast and analysis

In order to effectively avoid the defects of a traditional discounted cash flow method, a trinomial tree pricing model of the real option is improved and used to forecast the investment price of mining. Taking Molybdenum ore as an example, a theoretical model for the hurdle price under the optimal investment timing is constructed. Based on the example data, the op- tion price model is simulated. By the model, mine investment price can be computed and forecast effectively. According to the characteristics of mine investment, cut-off grade, reserve estimation and mine life in different price also can be quantified. The result shows that it is reliable and practical to enhance the accuracy for mining investment decision.

THE OPTIMAL HEDGE RATIO FOR UNCERTAIN MULTI-FOREIGN CURRENCY CASH FLOW

The paper extends the Adle and Dumas's simple regression approach of foreign currency hedging to the case of exposure to multiple foreign currencies and provides extension methodology.

On-line topical importance estimation:an effective focused crawling algorithm combining link and content analysis

Focused crawling is an important technique for topical resource discovery on the Web.The key issue in focused crawling is to prioritize uncrawled uniform resource locators(URLs) in the frontier to focus the crawling on relevant pages.Traditional focused crawlers mainly rely on content analysis.Link-based techniques are not effectively exploited despite their usefulness.In this paper,we propose a new frontier prioritizing algorithm,namely the on-line topical importance estimation(OTIE) algorithm.OTIE combines link-and content-based analysis to evaluate the priority of an uncrawled URL in the frontier.We performed real crawling experiments over 30 topics selected from the Open Directory Project(ODP) and compared harvest rate and target recall of the four crawling algorithms:breadth-first,link-context-prediction,on-line page importance computation(OPIC) and our OTIE.Experimental results showed that OTIE significantly outperforms the other three algorithms on the average target recall while maintaining an acceptable harvest rate.Moreover,OTIE is much faster than the traditional focused crawling algorithm.