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  ago showed
     Conclusion Compared this survey with AIRIAP research which was conduced five years ago showed that in Shanghai patients know more about the characteristics of asthma in recent years,but the work still need more efforts.
     结论上海患者对哮喘疾病的认识程度较以前有较大提高,但仍有许多不足之处,哮喘规范化防治工作任重道远,需医患双方进一步努力。
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     The salinity observed at this time is obviously higher than that before 1997. The mean values of N/P and Si/P are 16.73 and 1.67 respectively, which are slightly greater than those in the central area of the Bohai sea in 1998~1999 and N/P is lower than its values in 1992, 1995 and 1996 in this area.
     此次观测到的盐度较 1997年以前有明显升高。 莱州湾各层平均的 N/ P和 Si/ N分别为 16.73和 1.67,都比 1998~ 1999年渤海中部的值大 ,但 N/ P比 1992 ,1995和 1996年莱州湾的 N/ P明显偏低。
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     Results The ratio of female to male was 1.23∶1, the age was mainly in 20~49 years old (70.1%), the education level was mainly on high school level (60.9%), the quality of sleep was mainly not well (60%), most of them had depression ( 69.5%) and affective conflicts ( 81.0%).
     结果 自杀未遂者中女性∶男性 =1.2 3∶1,年龄均集中于 2 0岁到 4 9岁 (70 .1% ) ,多集中小学及以下 (6 0 .9% ) ,睡眠与以前有变化 (占 6 0 .0 % ) ,多为抑郁 (6 9.5 % )和多有情感冲突 (81.0 % )。
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     A total of 117(16.69%) students had experienced sexual abuse before the age of 16 years old.
     16岁以前有117人(16.69%)曾经历过性虐待。
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     The present paper recorded 32 species of Mollusca and 114 species oi Arthopoda inHenan collected from 34 cities and counties during 1979-1989.List of Invertebrates of Henan(continued)(see before)
     河南省的软体动物和节肢动物(不包括昆虫)以前有过一些调查,但只限少数群类,自1979-1989年共得软体动物32种及节肢动物114种,分布在全省34个市、县。
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     Result The positive rate of HIV antigen was 1.15% in 12 980 patients.
     结果  3年半来共检测标本 12 980例其中检出阳性标本 15 0例 ,阳性率为 1 15 % ,经过调查发现 84%的阳性患者 1995年以前有过卖血或血浆史。
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     The focus of the paper is just based on the criteria of software testing technology.
     优于以前的测试技术的方面。
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     The e-commerce of our country has got considerable development comparatively.
     我国电子商务较以前了长足的发展。
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     It main consist:
     主要
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     It has perisperm.
     外胚乳。
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     Long Ago
     多年以前
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  ago showed
This contribution deals with the case of a 16 years old male patient who after a direct injury to the proximal tibia four years ago showed a genu recurvatum of 18 degrees.
      
A follow-up study of about 5 years ago showed that vertigo disappeared in 48% of cases.
      
A review of generally accepted technology forecasts made 100 and 25 years ago showed that they were all woefully inaccurate.
      
Analysis of steam distillations of crushed garlic cloves performed over a century ago showed a variety of allyl sulfides.
      
Conn that ferritic steels provide no eralyears ago showed that the two advantages in terms of environmental safety.
      
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The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors...

The output signal-to-noise ratio (snr) of correlation detectors is analized.A correla-tion detector is a divice, which consists of two input filters, one output filter and one multiplier, and has two input pairs of terminals and one output pair of terminals.Unlike that described in papers[1][[2][[3] and[3], effects of input filters are consid ered in this paper. The formulation concerning the relation between the input snr and the output snr are derived, and special working conditions of correlation detectors are discussed.The conclusion is us follows: For small snr, the output snr is proportional to the products of two input snr; if the input snr of one channel is much lorger than the other and than 1, the output snr will be proportional to the smaller input snr; for all conditions (either strong signal, or weak signal) . the output snr of correlation detectors is comparable to the squar law detector's.

本文分析讨论相关检波器的输出信号杂音比,所谓相关检波器是这样一种装置,它包含两个输入和一个输出并由两个输入滤波器、一个输出滤波器和一个乘积器组成。和以前有过的讨论不同,文中考虑到了输入及输出滤波器的影响,导出了输入及输出信号杂音比关系的公式,讨论了相关检波器的几种特殊工作形式。结果指出,在小输入信号杂音比情况下,输出信号杂音比和两路输入信号杂音比的乘积成正比;在一路输入为大信号(相对于杂音)的情况下,输出信号杂音比和另一路输入信号杂音比成正比;无论在大信号或小信号输入情况下,相关检波器的输出信号杂音比与同样情况下平方检波器的输出信号杂音比是同量级的。

The kinetic study of hydrogenation reaction of 3,3'-dinitro-4,4'-diamino diphenyl ether with modified Raney nichel as catalyst, and DMF as the solvent was investigated. As the conversion is below 80%, the selectivity shown is good, and any negligible side reactions present may not be considered.The effects of various parameters, such as temperature, concentration and hydrogen pressure, on the rate of reaction were studied, and discussed. When the conversion is not over 80%, the conversion rate of raw material...

The kinetic study of hydrogenation reaction of 3,3'-dinitro-4,4'-diamino diphenyl ether with modified Raney nichel as catalyst, and DMF as the solvent was investigated. As the conversion is below 80%, the selectivity shown is good, and any negligible side reactions present may not be considered.The effects of various parameters, such as temperature, concentration and hydrogen pressure, on the rate of reaction were studied, and discussed. When the conversion is not over 80%, the conversion rate of raw material with respect to the partial pressure of hydrogen would be of 0.7th order, and to the concentration of raw materials would be of zero order. Within the range of mentioning conditions, may be represented as below: dC/dt=k P_(H2)~(0.7) (90—110℃; patial pressure of H_2=3—30 atmosphere; Concentration of the raw materials=0.4—1.2 mol/l; catalyst used=8 g/l).The rate of reaction in respect to temperature follows Arrhenius Equation closely, and the activity energy obtained by calculation is 14.5 kcal/mol.Furthermore, the conditions for higher conversion has been discussed.

以改性骨架镍为催化剂,二甲基甲酰胺为溶剂研究了3,3′-二硝基-4,4′-二氨基二苯醚的加氢反应动力学。结果表明,在转化率为80%以前有良好的反应选择性,副反应可忽略不计。研究了反应速度与温度、浓度、氢压等参数的关系。得知在转化率为80%以前原料的转化速率对氢分压为0.7级,对原料的浓度为零级。在温度为90—110℃,氢分压为3—30 at,原料浓度为0.4—1.2mol/l,催化剂用量为8 g/l的条件范围内可用式dc/dt=K_(H_2)~(0.7)表示。反应速度与温度的关系符合Arrhenius方程式。求得活化能为14.5 kcal/mol。同时,对高转化率的情况也进行了讨论。

There are 18 terms of records which have clear dates and descriptions of total or nearly total solar eclipses in China before 300 A.D., with the aid of these records, this paper compares and analyses the results on the research of secular acceleration of the Earth's rotation, presented in works of Curott, Newton, Stephenson and Han Yanben with the result obtained by the author himself from eclipses canon of Watabe.The authors gave different forms of results with different solar-lunar elements. Wehave reduced...

There are 18 terms of records which have clear dates and descriptions of total or nearly total solar eclipses in China before 300 A.D., with the aid of these records, this paper compares and analyses the results on the research of secular acceleration of the Earth's rotation, presented in works of Curott, Newton, Stephenson and Han Yanben with the result obtained by the author himself from eclipses canon of Watabe.The authors gave different forms of results with different solar-lunar elements. Wehave reduced them to unisonant system--sun table of Newcomb and "Improved LunarEphemeris". The date and the magnitude of each eclipse in the original records, the capital at that time, the standard value △Ts of △T, the value Z given by the specified author, AT calculated from Z, the difference 6AT(AT-ATs) and width of total eclipse zone on the latitude of the capital are shown in table 1. These results are aba shown in Fig, 1.It has been proved that the overwhelming majority of these records are reliable, but locations of these observations are void. We can not ascertain that all observations were made in the capital. So as to make more precise analysis about secular acceleration of the Earth's rotation by these records, further textual research is necessary.

我国两汉以前有明确日期和全食或近全食描述的日食记录有18个。对应用这些记录所做的地球自转长期加速的结果进行了比较和讨论。这些工作包括Curott、Newton、Stephenson、韩延本以及作者本人根据渡边敏夫的日食典所得到的结果。本文证实我国古代这些记录绝大多数是可靠的,但其观测地点没有记载,不能认为它们都是在当时的首都。因而利用这些记录作地球自转长期加速的精细分析尚需进一步的考证。

 
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