Cleaner Production Information Database''s Building of Chongqing

Cleaner Production must be done to achieve sustainable development. One of the most important things to develop Cleaner Production in Chongqing is to build Cleaner Production Information Database. The database confirms its purpose and function accorded with the situation of Chongqing. Furthermore, this database is designed by Delphi5 in Windows 2000 and proved to run well after debug. It can give service of technological information to Chongqing Cleaner Production.     

THERMAL EFFICIENCY ANALYSIS AND PRACTIS ON CONDENSATION-TYPE GAS INSTANCAUS WATER HEATER

This paper carries on theoretic anatysis about the energy save effect and thethermal efficien cy of conde nsation-type gas instan eaus water heater.Listed test values prove that thethermal efficiency of condensation-type natural gas instaneaus water heater is high 14% than com-mon-type.     

DATA COMPRESSION WITH HASH CODES

In many database applications, data have to be compressed before they can be stored. Data compression techniques with less overhead and better space saving are expected. This paper gives a data compression technique by which the size of a file may be reduced through substituting codes for its field values. The codes are the corresponding locations of the values in the hash table that is comprised of all the values of the field.The compression is effective for many applications, and the cost of the coding/decoding is equal to that of one access to the hash table. The implementation of the technique as a compression tool in DBMS for date storage and the algorithms of the coding/decoding are discussed.     

极早熟玉米制种中应注意的几个问题

黑龙江省北部北纬48.以北地区属寒温带湿润、半湿润气候,无霜期110～130d,秋霜早,干旱少雨,全年降水量400～800mm,其中60%集中在7-9月份.应用品种积温一般在1800～2200℃,品种熟期一般为80～100d,该地区年有效积温1900～2400℃,习惯上将适应这一地区生态条件而栽培种植的玉米称为极早熟玉米.目前生产上应用的极早熟玉米品种主要有克单8号、克单9号、冀承单3、海玉5号、卡皮托尔等.     

水培甜瓜对营养液及主要矿质元素的吸收特性

在ＤＦＴ栽培条件下，从定植到收获，甜瓜日平均吸收营养液０．４１Ｌ，定果后１０天内出现吸收峰值（１．１３Ｌ／株），收获前仍维持较高水平。不同生长时期内，甜瓜对钾、钙、镁、磷的吸收变化与甜瓜对营养液的吸收变化基本相似，营养生长时期，吸收量较少，授粉后吸收量急剧增加，在定果后１０天内出现吸收峰值，此后急剧减少，但甜瓜对钾的吸收峰值超前一周出现。根据甜瓜对主要大量元素的实际吸收浓度，可以推算甜瓜合适的营养液配方     

甘薯品种抗旱适应性的数量分析

抗旱适应性的定量描述是甘薯品种抗旱性改良的基础工作。目前在甘薯品种抗旱形态指标筛选和抗旱适应性的生理机理方面只有少量研究,尚无抗旱适应性定量描述的报道。本文在测定六个甘薯品种十项抗旱形态生理指标的基础上,运用模糊数学关于隶属函数的方法对甘薯品种抗旱适应性的定量描述作了初步探索。     

诱导百合鳞片芽的影响因子研究

采用正交试验的方法,在MS固体培养基上研究鳞片位置和不同浓度蔗糖、6-BA(6-苄基腺嘌呤)及NAA(α-奈乙酸)对诱导淡黄花百合不定芽的影响.结果表明:最佳外植体为中层鳞片,最佳培养基为MS 0.5mg/L 6-BA 0.5mg/L～1 mg/L NAA 3%～5%蔗糖.     

Modeling the relationship between the main emulsion components and stability, viscosity, fluid behavior, zeta-potential, and electrophoretic mobility of orange beverage emulsion using response surface methodology

The possible relationships between the main emulsion components (namely, Arabic gum, xanthan gum, and orange oil) and the physicochemical properties of orange beverage emulsion were evaluated by using response surface methodology. The physicochemical emulsion property variables considered as response variables were emulsion stability, viscosity, fluid behavior, zeta-potential, and electrophoretic mobility. The independent variables had the most and least significant ( p < 0.05) effect on viscosity and zeta-potential, respectively. The quadratic effect of orange oil and Arabic gum, the interaction effect of Arabic gum and xanthan gum, and the main effect of Arabic gum were the most significant ( p < 0.05) effects on turbidity loss rate, viscosity, viscosity ratio, and mobility, respectively. The main effect of Arabic gum was found to be significant ( p < 0.05) in all response variables except for turbidity loss rate. The nonlinear regression equations were significantly ( p < 0.05) fitted for all response variables with high R (2) values (>0.86), which had no indication of lack of fit. The results indicated that a combined level of 10.78% (w/w) Arabic gum, 0.56% (w/w) xanthan gum, and 15.27% (w/w) orange oil was predicted to provide the overall optimum region in terms of physicochemical properties studied. No significant ( p > 0.05) difference between the experimental and the predicted values confirmed the adequacy of response surface equations.