佛冈县林地果场生态养鸡的发展现状及问题浅析

随着人民生活水平的逐步提高,消费者更加注重食品的质量和安全。生态养殖可以生产出安全、优质的绿色产品,符合消费者对食品质优、安全的需求。利用林地果场生态养鸡,起到既可以生产出满足消费者需求的绿色产品,又可以保护生态环境、增加农民收入的作用,是发展生态农业的重要方式。对佛冈县林地果场生态养鸡的发展现状进行了介绍,对关键问题进行了分析,并对其养殖前景进行了展望。

深圳市某水库果场面源污染现状及控制措施研究

近年来,农业面源污染日趋严重,这对水库水源地的水质保护造成了威胁,为保护水库水源地水体的水质对水库水源地进行面源污染控制尤其重要。某水库作为深圳市XX区重要的供水水源地,对该水库进行面源污染控制具有重要意义。文章对某水库果场面源污染现状进行分析,并提出相应的工程控制措施。

果场龙眼低产低效的原因及对策

本文结合自身多年来的龙眼种植经验对龙眼低产低效的因素进行了详细分析，然岳结合相关经验及查阅资料，提出了龙眼低产低效的对策及改造措施，希望能有效提升龙眼的产量和质量。

论刑法因果关系之原因力

过于迷恋自洽体系的理论建构模式大大拉开了刑法因果关系研究与司法实践的距离,当务之急是把刑法因果关系理论从哲学的附庸中解救出来,重新定位。刑法因果关系是一个由诸多因素构建的体系,原因力、因果场、因果链、着力点是其核心要素。而原因力在诸多因素中的穿针引线使其成为理解刑法因果关系理论的主轴。通过对原因力的形成、内涵、归类、功能、具体适用的分析,让人们在清晰地把握原因力理论的同时,也给予了刑法因果关系理论准确的定位。

用现金流模式检测盈利模式的“质量”

通过现金流模式来判断某种盈利模式的好坏是直接而有效的。判断一个企业的盈利模式“质量”好坏，最直观的指标是看他们的现金流。并且不仅仅是看他们的现金流量表，更重要的是分析其现金流模式。

因果性究竟是什么?

本文依据现代逻辑学和现代科学的研究成果,指出穆勒的因果性概念是含混不清的。当代西方一些大哲学家,如波普、亨普耳,纳格尔等人对因果性概念的理解也是不够全面的。于是作者对因果性作了条件逻辑的分析,研究了因果场,因果箭头和相互作用的本质等问题,指出因果性就是由于物质的、能量的或信息的作用的传递使得对于一定的因果场来说,一事件是另一事件的INUS条件,从而加深了对“因果性是普遍联系的一个环节”这个辩证唯物主义原理的理解。

产业革命“八要素”让现代山地农业有奔头

罗甸依托“天然温室”优势,深耕产业革命“八要素”,农村产业革命呈燎燃之势,传统农业脱胎换骨,现代山地特色农业风生水起。冬日的罗甸,阳光和煦。走进罗甸县上隆茶果场,一排排修剪整齐的茶树映入眼帘。满山的青翠间,挂满了金色的脐橙,硕大诱人。沿着山路盘旋而上,半山腰处有十多个女工背着背篼,拿着剪子采摘脐橙。家住上隆茶果场移民村的岑成美就是其中之一.

晚年勤劳乐奉献

潘发腾,今年65岁,是个满头白发的退休干部.晚年他在离城约四五公里的凤凰山沟里营造果园,一年四季,风雨无阻,辛勤种植芒果、香蕉、荔枝、柑橙、青枣、龙眼等果树大约110多棵,年产各种水果四五百公斤;价值1 500元左右.

Experimental and field study on dissipation coefficient of supersaturated total dissolved gas

The elevated supersaturation of total dissolved gas （TDG） downstream of a high-dam spill has deleterious effects on fish in a large range. A one-dimensional （l-D） longitudinal model is optimal for the prediction of supersaturated TDG dissipation over a long distance. The key issue of the model is to determine the dissipation coefficient accurately. In agreement with field observations and experiment data, dimensional analysis and regression were performed to propose a formula for estimating the dissipation coefficient of supersaturated TDG in various rivers and reservoirs, and it involves the effects of the turbulence intensity, the hydro-pressure and the solid-liquid interface. The friction velocity, water depth, hydraulic radius and Froude number are independent variables in the formula which are easy to determine in practical applications. The 1-D longitudinal model is implemented to calculate the dissipation of TDG in a reach of the Jinsha River. Good agreement is found between the calculated results and field data for both the dissipation coefficient and the dissipation process.

Effects of Surface Etch Hole Fault on the Velocity Field in Microchannel Reactors

Microchannel reactors are commonly used in micro-chemical technology. The performance of microreactors is greatly affected by the velocity field in the microchannel. The flow field is disturbed by the cylindrical etch holes caused by air dust on the microchannel surface during its processing procedure. In this approach, a two-dimensional computational fluid dynamics （CFD） model is put forward to study the effect of etch holes on flow field. The influenced area of single or two concave etch holes is studied for the case of laminar flow. The hole diameter, the Reynolds number and the distance between the center of holes are found to have influences on the flow field. Numerical results indicate that the effects of etch hole on the flow field should be evaluated and the way of choosing the economic class of cleanroom for microreactor manufacture is presented.

Ecological Consequences of Land Use Change: Forest Structure and Regeneration across the Forest-grassland Ecotone in Mountain Pastures in Nepal

The ecotone, the spatial transition zone between two vegetation communities, is claimed to have more species than the adjoining communities. However, empirical studies do not always confirm higher richness at the ecotone. The ecotone position and structure are dynamic over time and space and it is driven by the changes in climate, land use or their interaction. In this context, we assessed the forest- grassland ecotone of temperate mountains in central Nepal by i） comparing species composition and richness across the ecotone, ii） analyzing if the forestgrassland ecotone is shifting towards the grassland center by colonizing them with trees, and iii） discussing the consequence of changed disturbance regime in the dynamics of this ecotone and the surrounding grasslands. We analyzed vegetation data sampled from belt transects laid across the forest- grassland ecotone in semi-natural grassland patches. Vegetation data consisting of species richness and composition, and size structure and regeneration of the two most dominant tree species, namely Rhododendron arboreum and Abies spectabilis, from the transects, were used to analyze the trend of the forest-grassland ecotone. Forest and grasslands were different in terms of floristic composition and diversity. Vascular plant speciesrichness linearly increased while moving from forest interior to grassland center. Spatial pattern of tree size structure and regeneration infers that forest boundary is advancing towards the grasslands at the expense of the grassland area, and tree establishment in the grasslands is part of a suceessional process. Temporally, tree establishment in grasslands started following the gradual decline in disturbance. We argue that local processes in terms of changed land use may best explain the phenomenon of ecotone shift and consequent forest expansion in these grasslands. We underpin the need for further research on the mechanism, rate and spatial extent of ecotone shift by using advaneed tools to understand the process indepth.

Mobile robot path planning based on adaptive bacterial foraging algorithm

The utilization of biomimicry of bacterial foraging strategy was considered to develop an adaptive control strategy for mobile robot, and a bacterial foraging approach was proposed for robot path planning. In the proposed model, robot that mimics the behavior of bacteria is able to determine an optimal collision-free path between a start and a target point in the environment surrounded by obstacles. In the simulation, two test scenarios of static environment with different number obstacles were adopted to evaluate the performance of the proposed method. Simulation results show that the robot which reflects the bacterial foraging behavior can adapt to complex environments in the planned trajectories with both satisfactory accuracy and stability.

Study on spillover effect of copper futures between LME and SHFE using wavelet multiresolution analysis

Research on information spillover effects between financial markets remains active in the economic community. A Granger-type model has recently been used to investigate the spillover between London Metal Exchange(LME) and Shanghai Futures Exchange(SHFE) ,however,possible correlation between the future price and return on different time scales have been ignored. In this paper,wavelet multiresolution decomposition is used to investigate the spillover effects of copper future returns between the two markets. The daily return time series are decomposed on 2n(n=1,…,6) frequency bands through wavelet mul-tiresolution analysis. The correlation between the two markets is studied with decomposed data. It is shown that high frequency detail components represent much more energy than low-frequency smooth components. The relation between copper future daily returns in LME and that in SHFE are different on different time scales. The fluctuations of the copper future daily returns in LME have large effect on that in SHFE in 32-day scale,but small effect in high frequency scales. It also has evidence that strong effects exist between LME and SHFE for monthly responses of the copper futures but not for daily responses.

Priority-sequence of mineral resources' development and utilization based on grey relational analysis method

Generally, the sequence decision of the development and utilization of Chinese mineral resources is based on national and provincial overall plan of the mineral resources. Such plan usually cannot reflect the relative size of the suitability of the development and utilization of mineral resources. To solve the problem, the paper has selected the gift condition, the market condition, the technological condition,socio-economic condition and environmental condition as the starting-points to analyze the influential factors of the priority-sequence of mineral resources' development and utilization. The above 5 conditions are further specified into 9 evaluative indicators to establish an evaluation indicator system. At last,we propose a decision model of the priority sequence based on grey relational analysis method, and figure out the observation objects by the suitability index of development. Finally, the mineral resources of a certain province in China were analyzed as an example. The calculation results indicate that silver(2.0057), coal(1.9955), zinc(1.9442), cement limestone(1.9077), solvent limestone(1.5624) and other minerals in the province are suitable for development and utilization.

Theoretical Study on Drift of Ca^(2+)Spiral Waves Controlled by Electric Field

Based on the Tang-Othmer Ca^2＋ model, the drift behavior of intracellular Ca^2＋ spiral waves under the influence of weak electric field is investigated. Numerical results show that the dependence of drift velocity of the spiral tip on dc electric field is similar to experimental observations in BZ system. When an ac electric field is applied, interesting resonant-drift phenomenon is observed with ω=2ω0. All results can be explained analytically using a proximate method.

Investigation on the Seasonal Trend of Fruit Markets in Changsha,Hunan Province

This investigation on the seasonal trend of fruit markets in Changsha indicated that the fruit varieties on the market in Changsha were abundant,up to 49 varieties;seasonal fresh fruits were continuously provided around the year;most fruits were domestic produce from all over the country,and about 3996 of the varieties were imported mainly from southeast Asia,America,New Zealand and Brazil;the imported fruits and a few kinds of domestic fruits were higher in the quality grades than most domestic fruits,which accounted for approximately half of the total fruit volume;and fruit prices varied markedly with fruit varieties,quality grades and time of marketing.In a word,the Hunan fruit industry must increase fruit quality and diversity in order to achieve a favourable position in the strong international competition.

The Relationship between Local Government and the Development of Industrial Clusters

Apart from spontaneous market force, the development of industrial clusters is indispensable from government role in that their development entails the guidance and support from local governments. During the development process, local governments play an extremely important role. On the basis of former research results, the author raises that while developing industrial clusters, local governments should play their important role by formulating a scientific and complete policy supporting system.

Influence of Osmotic Dehydration with High Electric Field on the Drying Kinetics and Mass Transfer of Green Apples

Traditional thermal methods of drying food have often led to loss of flavours, nutrients, vitamins, etc., which encourages non-thermal pretreatments such as osmotic dehydration （OD） and/or high electric field （HEF） application to improve the overall product quality. The aim of this study was to evaluate the effect of osmotic dehydration （50% sucrose） with high electric field strengths of 0.5 and 1.0 kV/cm as pretreatments on the drying kinetics and mass transfer of green apples during convective drying at 65 ~C and microwave drying at 1 W/g. The added value of the OD and HEF on the drying kinetics, and the effective mass transfer coefficients of the subsequent drying methods were investigated through this research. The efficacy of these pre-treatments was assessed and compared using cell disintegration index, product texture and thus bring forth new correlations between these pre-treatments and the cell disintegration index using dielectric spectroscopy and its effect on the product texture.

Ethical Trading： The Implications of the Human Rights Watch Report on South African Fruit Exports

This paper presents an ex-ante assessment of the potential implications of the 2011 Human Rights Watch Report on the South African fruit industry. The report explicitly mentions the lack of compliance with ethical codes within the fruit industry, the prevalence of exploitative conditions for farm workers and diverse human rights abuses in farms. The report recommends import ban on culprits as well as engaging third party auditing to ensure compliance. The high vulnerability of the smallholder farmers justified the special interest in the implications on their reputation and hence their ability to access profitable export markets. Although large-scale commercial farmers are potentially at risk of reputational damage due to the Human Rights Watch Report, they are better able to cope owing to their stronger capital base. The opinions of knowledgeable industry insiders were therefore elicited through qualitative research that used a five-point Likert scale to assess perceptions about market access. On the basis of the results, it is probable that the report will lead to improved working conditions for farm workers, improved concern for consumers＇ health, and enforcement of legislation by the govemment. The negative implications involve increased competition, possibility of retailers＇ rationalising their supply base and increased evaluation that ends at the farm gate. There is also high probability of increased marginalisation of the already disadvantaged smallholder suppliers, and possible increase in costs of auditing and accreditation for the entire fruit industry. Thus, active collaboration among all stakeholders to ensure the competitiveness of the fruit industry is inevitable.

Cooperatives on Transaction Costs and An analysis based on a survey of apple-growing farmers

This paper presents an empirical analysis of the effect that participation in an agricultural cooperative has on the transaction costs and net income of apple- growing farmers in Shandong province. Compared with independent farming, agricultural cooperatives reduce transaction costs by 48 yuan/mu and increase farmers＇ net income by 321 yuan/mu. Other factors found to influence transaction costs and farmers＇net income were farmer＇s gender, educational attainment, farm size, the availability of market information, distance to market, and level of government support. Independent farmers＂ most common explanations for not participating in agricultural cooperatives were that doing so would not reduce transaction costs significantly and that the cooperatives would impede the autonomy of their decision-making.