| 1. | The establishment of the first filter beds - the albany filters
兴建第一座滤水厂 |
| 2. | Firstly , study the hydrodynamic properties in the filtering bed ; secondly , analyze the influencing factors by the method of numerical simulation with the above mathematical model
第二，应用试验建立的渗滤取水水文地质数学模型，对渗滤取水的取水量影响因素进行数值模拟分析。 |
| 3. | ( 3 ) the blockage of filtering bed and the thickening of the argitan can cause the change of hydrodynamic properties in the filtering bed , which leads to the decrease of water quantity
( 3 )滤床堵塞和泥膜增厚可能产生滤床中水动力特征的改变，会产生非饱和流导致出水量的衰减。 |
| 4. | The second construction phase of the kowloon reservoir began in 1922 and involved extending the filter beds , so that they could filter at least 3 , 580 , 000 gallons per day . the expenses for this were $ 366 , 082
九龙水塘的第二期工程于1922年开展，工程项目包括扩建滤水池，使每天滤水能力增至358万加仑食水，扩建费用为36 |
| 5. | Additionally in 1939 , the government added filter beds to the aberdeen lower reservoir . due to these improvements , the network of water supply was further widened and even remote areas , such as ap lei chau , could receive fresh water
政府并于1939年，在鸭利洲及香港仔下塘各增建滤水池，使水塘的供水能伸延至鸭利洲一带的偏远地区，供水网络得以扩张。 |
| 6. | In 1897 , the government built a matching water system and three filter beds for the reservoir . during the drought period , private reservoirs helped the government to supply water to hong kong residents , thus easing the problem of water shortage
1897年，政府更为该塘兴建一个配水库及三个滤水池。在天旱期间，私人水塘曾协助政府，提供食水予香港居民，纾缓香港食水短缺的问题。 |
| 7. | The researches indicated : ( 1 ) the seepage flow field of infiltration diversion is characterized by three - dimensional , saturated and steady flow . there is the close hydraulic relationship between the river and the groundwater in the filtering bed , and the groundwater is confined
研究表明： ( 1 )渗滤取水的渗流场具有典型的饱和三维稳定流特征；渗滤取水滤床中地下水与河流的水力联系比较紧密，滤床中的地下水处于承压状态。 |
| 8. | ( 4 ) the maximum water quantity becomes greater , the better is the filtering bed permeability , the higher the river hydraulic conductance , the higher the river level , the larger the water - collecting area and the bigger the distance between collecting pipes . the water quantity varies directly with drawdown
( 4 )滤床的渗透性能越好，河床水力传导系数越高，河水水位越高，取水面积越大，取水管之间的间距越大，则最大取水量越大；水位降深与取水量成正比关系。 |
| 9. | The characteristic of power quality signal ' s deal by wavelet multi - resolution decomposition and time - domain analysis is studied then brings forward combine the tow methods and uses it to filter bed yawp , decomposition and feature extraction . 8 kinds of power quality are classified and characterization of sag is specially classified
然后研究了小波多分辨率分解和时域分析电能质量信号处理的特点，提出了应用两种方法相结合的方法，对电能质量信号进行去噪、分解，通过大量的计算机仿真工作，对扰动信号进行了特征提取。 |
| 10. | It is shown that the effect of pac removing fluoride is closely related to ph value and the optimum range of ph value is between 6 . 1 ? 7 . 1 . under this condition , further studies are made on the optimum coagulant dosage , mixing time , artificial turbidity , filtration rate and filter bed ' s depth and the optimum range of these parameters have been determined
碱式氯化铝的除氟能力与原水的ph值有密切的关系，除氟最佳ph值范围为6 . 1 ? 7 . 1 。在此条件下，进一步对最佳投药量、混合时间、反应时间、人工辅助投加浊度、滤速及滤层厚度进行了研究，确定了其最优的取值。 |
