When ship's age exceeds reasonable service life, the average accumulation repair cost increase two times for passenger-cargo vessels and 3.5 times for barges, and their average accumulation annual costs increase to 23 -24 percent, or the cost of one repair exceeds half the purchase price of the vessel.

Results (1) The 10-year accumulated coronary event rates were 1.41% for men and 0.62% for women and stroke event rates, 2.02% for men and 1.37% for women.

The cumulate descending quantities of average water lever are 0.46 m and 1.008m,it was only 1～2 centimeter along with water quantity gradually tend to balance during the tenth year. Although water level fall was bigger at the end of exploitation period,it would be renewed after exploitation period,which accords to the fact that the groundwater reserves were abundance.

RESULTS Of 24 patients, 18 received one injection, 5 two injections and only 1 case received three injections. The average total volume of hydrophilic polyacrylamide injected was 18.9 (range 6-38) ml.

Combining the collecting, arranging, analyzing and calculating of the data that comes from 60 companies of 10 industries between 1998 and 2000 and the Accident Analysis and the Accountancy Analysis, several conclusions comes out on the basis of much reading.

The cumulative mean vertical distributions showed that 84.3% of time was spent above 10-m depth, even though water temperature altered little with increased depth.

malma in individual watersheds were closely related to an index of cumulative mean monthly temperatures exceeding 5°C.

Forty-one of our patients who received a cumulative mean dose of MTX of 1550.5±235.5 mg underwent a percutaneous liver biopsy.

There is a good parallel between the cumulative mean deviations of the river discharge and the quantity of soles caught in the area with a time lag of 4 yr between these two curves.

Nueces Bay salinity decreased substantially when the 10-d cumulative mean daily Nueces River flows exceeded 10 m3 s-1.

Above the pre-Oligocene base, the total sediment mass for the whole SCS is estimated to be 1.44×1016 t, with the highest average accumulation rate of ～22 g·cm-2·ka-1 in the Oligocene.

Final 24-hour average accumulation levels of sorbed cadmium compared to cadmium in estuarine water were: bentonite-cadmium, 100%; humic acidcadmium, 60%; mud sediment-cadmium, 33%; albumin-cadmium, 12%.

Average accumulation rates calculated with the model ranged from about 0.024 mm month-1 to 0.150 mm month-1 for a net annual rate of 0.92 mm yr-1.

Similarly, the average accumulation rate (cm water equivalent year-1) is higher in the Renland relative to DML.

Taking the average accumulation ratio at 5500 lux light intensity as 100, the average values at 2500 and 1000 lux were 67 and 26 respectively.

Based on the statistics of a large amount of fullsized data and on analysis of ship repair, cost, profit, and scrapped ships as well as the depreciation rates of fixed assets, this paper points out that today vessels on the Changjiang River with a service life of 40 years are undesirable.If the required service life of ships is too long, it is not beneficial to the renew and reconstruction of ships due to the depreciation rates of fixed assets on the low side, the more service life of ship, and the taking percent...

Based on the statistics of a large amount of fullsized data and on analysis of ship repair, cost, profit, and scrapped ships as well as the depreciation rates of fixed assets, this paper points out that today vessels on the Changjiang River with a service life of 40 years are undesirable.If the required service life of ships is too long, it is not beneficial to the renew and reconstruction of ships due to the depreciation rates of fixed assets on the low side, the more service life of ship, and the taking percent deduct from repair charge (i. e. repair cost rate) will grow high, the more required repair cost. Take passenger-cargo vessel for instance, the repair cost of 40 years old is 1.89 times that of a similar vessel of 25 years old, and the repair cost rate of barge of 40 years old is 2.7 times that of a large 25 years old.When ship's age exceeds reasonable service life, the average accumulation repair cost increase two times for passenger-cargo vessels and 3.5 times for barges, and their average accumulation annual costs increase to 23 -24 percent, or the cost of one repair exceeds half the purchase price of the vessel.After discussing the factors affecting the service life of ships and analysing the economic life of a ship, the authors propose alternatives about the reasonable service life of transport ships on the Changjiang River.

The compositional variations of 2--hydroxyethyl methacrylate--N--vinylpyrrolidone--styrene (HEMA--NVP--St) at different reaction extents and the effect of asmall amount homogenizer on the homogenizing of copolymer composition were stud-ied by elementary analysis and double--bond analysis. It was found that the influenceof adding homogenizer into the HEMA--NVP--St copolymerization systems on the re-action kinetics was small, but on the homogenizing of copolymer composition waslarge. Homogenizer was able to cause...

The compositional variations of 2--hydroxyethyl methacrylate--N--vinylpyrrolidone--styrene (HEMA--NVP--St) at different reaction extents and the effect of asmall amount homogenizer on the homogenizing of copolymer composition were stud-ied by elementary analysis and double--bond analysis. It was found that the influenceof adding homogenizer into the HEMA--NVP--St copolymerization systems on the re-action kinetics was small, but on the homogenizing of copolymer composition waslarge. Homogenizer was able to cause the composition distribution, i.e., the cumulatedaverage copolymer compositions at various reaction extents, to become more homoge-neous. The copolymer microstructure was studied by IR, TEM method and the role ofhomogenizer was revealed. It was homogenizer having improved the compatibility ofreaction systems that resulted in the more homogeneous composition distribution orcopolymers.

A technique using a nvcro-computer (Apple-Ⅱe) to process four groups of weak optical signals in an optical fiber gas sensor system is introduced. It improves the function of this detection system obviously. The desings of the hardware, software and some relative problems are also introduced.