微型同位素辐射能收集器二维悬臂梁机电建模

基于欧拉-伯努利梁理论,设计了一种新型的微型同位素辐射能收集器二维机电模型。该模型解决了一维机电模型无法涵盖的诸多问题。算例分析表明:本模型能较准确地描述实验过程和预测实验结果。通过对结果进行分析,得出了影响微悬臂梁的位移、梁的往返周期和梁中存储能量的一系列因素。     

Genetic analysis for brix weight per stool and its component traits in sugarcane （Saccharum officinarum）

Brix weight per stool (BW) of sugarcane is a complex trait, which is the final product of a combination of many components. Diallel cross experiments were conducted during a period of two years for BW and its five component traits, including stalk diameter (SD), stalk length (SL), stalk number (SN), stalk weight (SW), and brix scale (BS) of sugarcane. Phenotypic data of all the six traits were analyzed by mixed linear model and their phenotype variances were portioned into additive (A),dominance (D), additive×environment interaction (AE) and dominance×environment interaction (DE) effects, and the correlations of A, D, AE and DE effects between BW and its components were estimated. Conditional analysis was employed to investigate the contribution of the components traits to the variances of A, D, AE and DE effects of BW. It was observed that the heritabilities of BW were significantly attributed to A, D and DE by 23.9%, 30.9% and 28.5%, respectively. The variance of A effect for BW was significantly affected by SL, SN and BS by 25.3%, 93.7% and 17.4%, respectively. The variances of D and DE effects for BW were also significantly influenced by all the five components by 5.1%～85.5%. These determinants might be helpful in sugarcane breeding and provide valuable information for multiple-trait improvement of BW.     

4LZ-1.0型全喂入轴流式联合收获机主参数选择与计算

为适应浙江省田块和地形条件,采用联合收割机总体设计原则,设计中、小型联合收割机,对4LZ-1.0型全喂入轴流式收获机的割幅、作业速度、生产率、功率、比压等主要参数进行分析和计算确定。     

几种食用真菌对甘蔗渣利用的研究

采用液体摇床发酵和固体平板培养技术,以甘蔗渣为唯一碳源,研究灵芝、大球盖菇、金针菇、柱状田头菇四种食用真菌对甘蔗渣的利用情况.测定在四种不同甘蔗渣含量的培养基中各食用真菌所产羧甲基纤维素酶活力和菌丝干重,同时测定了四种茵在平板上的菌丝生长速度.结果表明,灵芝在35g/L液体培养基中所产羧甲基纤维素酶活力最高达831U,所生长茵丝最重达1.162g.固体培养时,金针菇在30g/L生长速度最快达15mm/d.     

利用生物质甘蔗制Z造生物基聚乙烯醇高分子材料的优势探讨

概述了高分子材料聚乙烯醇的发展现状,对以甘蔗为原料开发"生物质乙烯制生物基高分子材料-聚乙烯醇"产品的发展,市场、技术、经济等方面的优势进行了深入分析,阐明了不断发展生物质乙烯法制生物基高分子材料聚乙烯醇等生物质化工产业群是广西生物质甘蔗深化利用的有效途径。     

实用新型马铃薯收获机

实用新型马铃薯收获机采用"地滚轮"传动装置,成功地解决了动力提取困难、传动路线长、传动结构复杂等问题;新颖的"溜槽螺旋筛"使土、薯分离顺利,有效地解决了马铃薯起收过程中的脱皮、掉皮等技术难题.为马铃薯收获机械的广泛应用展示了良好的前景.     

Influence of vermicomposting on solid wastes decomposition kinetics in soils

The effect of vermicomposting on kinetic behavior of the products is not well recognized. An incubation study was conducted to investigate C mineralization kinetics of cow manure, sugarcane filter cake and their vermicomposts. Two different soils were treated with the four solid wastes at a rate of 0.5 g solid waste C per kg soil with three replications. Soils were incubated for 56 d. The CO2-C respired was monitored periodically and a first-order kinetic model was used to calculate the kinetic pa-rameters of C mineralization. Results indicated that the percentage of C mineralized during the incubation period ranged from 31.9% to 41.8% and 55.9% to 73.4% in the calcareous and acidic soils, respectively. The potentially mineralizable C (C0) of the treated soils was lower in the solid waste composts compared to their starting materials. Overall, it can be concluded that de-composable fraction of solid wastes has decreased due to vermicomposting.     

浅谈乡镇面对食糖市场价格低迷的对策--云南昌宁县更戛乡甘蔗产业发展现状个案分析

对云南省昌宁县一个乡的甘蔗及甘蔗农特税被取消后的复杂形势进行分析，进而提出促进农民增收和广大农村的全面建设小康社会步伐的相应对策。     

Complete Charging for Piezoelectric Energy Harvesting System

Under an in-phase assumption, the complete charging for an energy harvesting system is studied, whichconsists of a piezoelectric energy harvester （PEH）, a bridge rectifier, a filter capacitor, a switch, a controller and arechargeable battery. For the transient charging, the results indicate that the voltage across the filter capacitor increasesas the charging proceeds, which is consistent with that reported in the literature. However, a new finding shows thatthe charging rate and energy harvesting efficiency decrease over time after their respective peak values are acquired.For the steady-state charging, the results reveal that the energy harvesting efficiency can be adjusted by altering thecritical charging voltage that controls the transition of the system. The optimal energy harvesting efficiency is limitedby the optimal efficiency of the transient charging. Finally, the relationship between the critical charging voltage andthe equivalent resistance of the controller and rechargeable battery is established explicitly.     

甘蔗梢(叶)收集处理现状及对策

目前甘蔗梢(叶)严重过剩,利用率低,大部分蔗梢(叶)都被焚烧,不但造成环境污染,而且浪费了饲料资源。影响其综合利用发展的关键和难点在于对甘蔗梢叶的收集处理。文章简要阐述当前我国甘蔗梢叶的收集现状、存在的问题及对策,以期尽早实现甘蔗梢叶的规范化收集和处理。