简介:电泵井停机声光报警器由4部分组成:1、控制信号检测器;2、控制继电器;3、声光报警器4、编码发射器。在电泵井故障停机或来电没能及时起机时提供声光报警,使值班或夜巡人员能及时发现,及时处理。由于电泵井控制屏在井口房里,电泵的运行状态不能象抽油机那样容易观察。电泵井产量高,过、欠载停机很难发现,使用停机声光报警器后使电泵井的运行状态很容易观察,采油小队队部接到报警信号后,可迅速到达报警区域,白天高达100分贝的警报声能在很远处听到,夜间闪烁的报警灯也非常容易被发现。使用停机声光报警器后岗位工人能在最短的时间里发现停机的电泵井,做到及时处理,及时起机,提高电泵井生产时率,使产量损失降到最低。
简介:CaSiofx-4500p计算器的各种功能较之fx-3600p、fx—180p等有了长足的进步。该机最大步骤数为1103步,具有转移和子程序功能,用以复杂的重复计算。该机不失为现场测量人员选用的较好机型,现简介如下:
简介:AstochasticmodelfordailyprecipitationsimulationinChinawasdevelopedbasedontheframeworkofa′Richardson-type′weathergeneratorthatisanimportanttoolinstudyingimpactsofweather/climateonavarietyofsystemsincludingecosystemandriskassessment.ThepurposeofthisworkistodevelopaweathergeneratorforapplicationsinChina.Thefocusisonprecipitationsimulationsincedeterminationofotherweathervariablessuchastemperatureisdependentonprecipitationsimulation.AframeworkoffirstorderMarkovChainwithGammaDistributionfordailyprecipitationisadoptedinthiswork.Basedonthisframework,fourparametersofprecipitationsimulationforeachmonthat672stationsalloverChinaweredeterminedusingdailyprecipitationdatafrom1961to2000.Comparedwithpreviousworks,ourestimationfortheparameterswasmadeformorestationsandlongerobservations,whichmakestheweathergeneratormoreapplicableandreliable.Spatialdistributionsofthefourparametersareanalyzedinaregionalclimatecontext.Theseasonalvariationsoftheseparametersatfivestationsrepresentingregionaldifferencesarediscussed.Basedontheestimatedmonthlyparametersat672stations,dailyprecipitationsforanyperiodcanbesimulated.A30-yearsimulationwasmadeandcomparedwithobservationsduring1971-2000intermsofannualandmonthlystatistics.Theresultsaresatisfactory,whichdemonstratestheusefulnessoftheweathergenerator.