后起勃发的“浙北现象”探析

浙北近几年的崛起,很大程度上得益于嘉兴人自觉地把嘉兴作为长三角大都市圈的重要一员来考虑,并且首先从思想观念上努力实现从靠近上海到融入上海的转变。通过有效的经济布局追求区域内资源的优化配置和共建共享,在甘当配角过程中争当名角。

Economic Evaluation on "Planting Three to Produce Four" High-yielding Project of Super Hybrid-rice in Hunan

The research conducted investigation and survey on 186 farm households in 2014 and carried out economic evaluation on ＂planting three to produce four＂ highyielding project of super hybrid rice. The results showed that the project of ＂planting three to produce four＂ performed significantly in terms of increasing yields and incomes. For example, per unit area yield of one-season late hybrid rice and middleseason hybrid rice proved the highest, and net income from middle-season rice in Longhui was the highest. It is obvious that to increase per unit yield is key for improving net incomes and to reduce machine fees and worker fees is crucial for decreasing fees.

Interspecific Hybridization Between Crassostrea angulata and C. ariakensis

lnterspecific hybridization can generate heterosis, which is proven to be a useful tool in selective breeding programs for oyster culture. Crassostrea angulata and C. ariakensis are two important economic shellfish species in China. We conducted 2 × 2 reciprocal crosses to determine whether these two species can cross-fertilize and their hybrids can hatch, survive and perform hetero- sis. Fertilization was found symmetrical without delay. The rate of fertilization success of C. angulata ♀× C. ariakensis ♂ was lower than that of C. ariakensis ♀ x C. angulata ♂, and the success rate of both hybridizations was lower than that of two intraspecific crosses each. During the planktonic period, survival rate of the progeny was lower in the hybrid crosses than in the intraspecific crosses. On day 360, mean shell height of the progeny of C. angulata ♀ x C. angulata ♂ was highest, which was followed by that of C. angulata ♀ × C. ariakensis ♂, C. ariakensis ♀x C. ariakensis ♂ and C. ariakensis ♀× C. angulata ♂ in a descending order. Mor- phology of adults produced by the hybrid crosses was similar to that of C. angulata. Both hybrids underwent normal gonad devel- opment and produced mature gametes in the mating season. This study provided new insights into the quantitative traits in interspeci- fic crosses of Crassostrea species, thus being of guidance value for selective breeding of oyster.

DOA-Rice Program in the Philippines

This paper deals with the recent hybrid rice development in the Philippines and some information about developing economic and technical cooperation in hybrid rice between China and the Philippines.

A NEW HYBRID FORECASTING ALGORITHM AND ITS APPLICATION IN ECONOMIC ANALYSIS

There exists a great deal of periodic non-stationary processes in natural,social and eco- nomical phenomenon.It is very important to realize the dynamic analysis and real-time forecast within a period.In this letter,a wavelet-Kalman hybrid estimation and forecasting algorithm based on step-by-step filtering with the real-time and recursion property is put forward.It combines the advantages of Kalman filter and wavelet transform.Utilizing the information provided by multi- sensor effectively,this algorithm can realize not only real-time tracking and dynamic multi-step fore- casting within a period,but also the dynamic forecasting between periods,and it has a great value to the system decision-making.Simulation results show that this algorithm is valuable.

Hybridisation Potentials for Heavy Trucks Considering Route Topography

Based on dynamometer test cycles or plain motorway operation, heavy truck hybridisation must be considered as uneconomic if only the kinetic vehicle energy can be recuperated. In mountainous regions, micro hybridization by a 48V-belt generator or mild parallel hybridisation by a large high voltage electric drive can result in considerable fuel consumption savings as well as additional benefits for heavy load utility vehicles. Additional electric power and battery size are still critical design parameters as well as critical cost factors considering the limited space and depreciation time as well as the need for maximum payload. Based on vehicle model simulations, this contribution quantifies fuel consumption savings, recuperation energy harvesting and battery requirements for different truck sizes with test cycles based on realistic route topography. The main route topography parameter for the recuperation benefit is the effective incline that integrates all downhill sections that overcompensates the vehicle resistance by tire friction and air resistance. The simulation parameter studies lead to an analytical benefit estimation, based on load cycle parameters like effective velocity, effective incline as well as the vehicle parameters mass, drag coefficient and cross sectional area. Thus, the return on investment can be assessed by an analytic rule of thumb, based on tracked cycles of existing vehicles.

Growth Performance, Feed Conversion Ratio and Economics of Production of Native and Crossbred （Local x Holstein Friesian） Bulls for Fattening under Different Improved Feeding

An experiment was conducted to evaluate the growth performance and cost per gain of indigenous and crossbred （local x Holstein Friesian （L x HF）） bulls under four different improved feed treatments to determine the appropriate ration for economic organic beef production in Bangladesh. Twenty indigenous bulls （average body weight 208.08 ± 13.98 kg） and 20 crossbred （L x l-IF） bulls （average body weight 256.26 ± 26.85 kg） of 24 months age were divided into four equal groups and fed on four diets （T0, T1, T2 and T3） up to 120 d, where To referred to the conventional diet, and T1, T2 and T3 referred as improved organic diets. Required dry matter for individual animal was supplied by roughage and concentrate sources of the ration in the ratio of 2：1. Local grass and paddy straw were supplied to group T0 and T1, Napier grass and straw to group T2, and Napier grass （Pennisetum purpureum）, straw and Ipil-ipil leaf （Leuceana leucucephala） to group Ts as roughage; whereas, the concentrate was supplied as 1.5% of live weight. The results revealed that total dry matter intake （DMI）, total DMI as percent live weight （%LW）, feed conversion ratio （FCR） and average daily gain （ADG） varied significantly （P 〈 0.01） among different treatment groups. Breed also had significant （P 〈 0.01） effect on total DMI, FCR and ADG, but total DMI （%LW） was not affected by breed type. Feed cost expressed as per kg live weight gain （LWG） （BDT/kg LWG; 1USD = 78.95 BDT）, were also affected （P 〈 0.01） by feed treatments and breed type. Indigenous and crossbred bulls fed diet T3 had higher ADG （0.49 kg and 1.17 kg, respectively） and comparatively lower feed costs （156 BDT/kg LWG and 96.78 BDT/kg LWG, respectively）. But crossbred （L × HF） bulls showed the highest ADG （1.17 kg） and the lowest feed cost （96.78 BDT/kg LWG）. Therefore, considering the growth performance and cost per kg gain of the experimental animals, it may be concluded that the crossbred （Lx HF） bulls treated with T3 diet may be used for economic organic beef production in Bangladesh.