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22 条记录 (耗时 0.014 秒)

    STANDARD MERCURY SOLUTION
    2.
    发明专利
    STANDARD MERCURY SOLUTION 失效

    公开(公告)号：JPS5585240A

    公开(公告)日：1980-06-27

    申请号：JP16384778

    申请日：1978-12-22

    申请人： NIPPON ELECTRIC CO

    发明人： ISHIHARA TOSHIO ,  SAKAGUCHI TOORU

    IPC分类号： C01G13/00 ,  G01N1/00

    摘要： PURPOSE:To prevent lowering in the mercury concentration of the standard mercury solution used for measurement of the mercury concentration by the reduced vaporization atomic absorption method by adding a specified amount of permanganate to the standard mercury solution comprising an acid solution of a mercury compound. CONSTITUTION:More than 0.01% of permanganate is added to the standard mercury solution comprising an acid solution such as mercuric chloride in coexistence. Only being water soluble and stable for preservation are required for mercuric salt used for preparation of the standard mercury solution. In this respect, mercuric chloride is ideal. Permanganate of less than 0.01% by weight provides a limited effect of stabilizing the mercury concentration and is also inconvenient in acutual application because of lighter violet or pink peculiar thereto. The standard mercury solution below pH 2 is good in the acidity. Prolonged maintenance of the mercury concentration eliminates the need for preparation of the standard mercury solution for each measurement of the concentration.

    TREATING METHOD FOR WASTE SOLUTION CONTAINING HEAVY METAL
    3.
    发明专利
    TREATING METHOD FOR WASTE SOLUTION CONTAINING HEAVY METAL 失效

    公开(公告)号：JPS5476481A

    公开(公告)日：1979-06-19

    申请号：JP14411177

    申请日：1977-11-30

    申请人： NIPPON ELECTRIC CO

    发明人： SUGANO IZURU ,  ISHIHARA TOSHIO ,  OKUDA TANEAKI

    IPC分类号： C02F1/62

    摘要： PURPOSE:To stabilize further ferrite precipitate formed through ferrite-process treatment of waste soln. containing heavy metals, by oxidizing the ferrite precipitate with addn. of specific amount of ferrous salt simultaneously with, or after, the completion of the ferrite-forming reaction. CONSTITUTION:To a water soln. contg. heavy metals is added ferrous ion not less than twice the total number of mols of harmful metallic ions and alkali about equivalent to the total acid redicals contained in the waste slon. In order to oxidize the ferrous cpd. and to precipitate the ferrite having taken in the harmful metals. To the ferrite is added ferrous ion not less than 1/50 the ferrous ion having been added in the ferrite-forming reaction to oxidize the ferrous cpd. additionally. This treatment stabilizes the ferrite precipitate, and further decreases the elution of heavy metals other then Fe from the ferrite precipitate.

    CODE ARRANGING SYSTEM
    8.
    发明专利
    CODE ARRANGING SYSTEM 失效

    公开(公告)号：JPS60259040A

    公开(公告)日：1985-12-21

    申请号：JP11510184

    申请日：1984-06-05

    申请人： NIPPON ELECTRIC CO

    发明人： ISHIHARA TOSHIO

    IPC分类号： H04L27/34

    摘要： PURPOSE:To operate a common amplifier with a back-off less than that required substantially by changing the code arrangement of a multi-carrier when a peak factor is large so as to suppress the peak. CONSTITUTION:When a code arrangement where four 16QAM waves are maximum modulation output levels respectively while the waves ar supervised by a code arrangement supervisory circuit 5 is obtained, the code arrangement is changed by a code arrangement converting circuit 6 so as to bring the modulation output level on a signal line group 1 to a minimum value. Then conversion processing information is transmitted while being superimposed on a predetermined bit location on a signal line group 4 by an information addition circuit 7. The reception side executes the operation restoring the code arrangement by the information bit so as to reproduce correctly the information.

    SYNCHRONOUS LOOP SWITCH TYPE CARRIER REGENERATIVE SYNCHRONOUS CIRCUIT
    9.
    发明专利
    SYNCHRONOUS LOOP SWITCH TYPE CARRIER REGENERATIVE SYNCHRONOUS CIRCUIT 失效

    公开(公告)号：JPS6024752A

    公开(公告)日：1985-02-07

    申请号：JP13336883

    申请日：1983-07-20

    申请人： NIPPON ELECTRIC CO

    发明人： ISHIHARA TOSHIO

    IPC分类号： H04L27/227

    摘要： PURPOSE:To return to the synchronous condition by taking out the VCO controlling signals from the front phase of the low pass filter in the synchronous loop switch type carrier regenerative synchronous circuit, when the output signals of the low filter do not exist. CONSTITUTION:Output modulation signals are synchronous-detected with regenerative carriers of the voltage control oscillator VCO7 by the phase detector 2 from the input 1, passed through the amplifier 3 and also the waveform shaping low pass filter 4, and digitized with the discrimination circuit 5. When the VCO oscillation frequency is largely off from the center frequency of the input modulation signals due to, for example, power failure and the frequency of the oscillator 7 stops, components necessary for synchronization in the output of the low pass filter 4, which will be detected by the signal detector 9, and the switching device 8 is controlled. The amplifier 3 output where components necessary for synchronization is forcibly transferred to the VCO control circuit 10, the circuit 10 is released, the oscillating frequency of the oscillator 7 is made close to the modulation signal center frequency, also transferred to the synchronizing condition, which is detected by the low pass filter 4, the switching device is controlled, and the output of the filter 4 is transmitted to the oscillator 7.