Objective To transform the equipment with traditional RS232 interface into that with CAN connection interface.Methods On the CAN main line,node is the station for information receiving and transmission in the network.The intelligent node can establish the work way ID,the address and the baud rate through the programming.It is mainly composed by the singlechip and the programmable CAN correspondence controller.Results The hardware and software were designed.SJA1000 initialization,transmission and receiving subroutines are including in the software design.Conclusion CAN is a kind of excellent field bus with high reliability,low cost and has been applied in many fields.It has already formed the international standard and been viewed as one of the most widely used field buses in future.Lots of traditional equipment with RS232 interface are facing the problem of CAN interface transformation.

This paper mainly introduced the manufacturing technique and circuit theory or a new type of constant-temperature heating device used in laboratory. The practical application shewed that it was a rather ideal laboratory device.

This paper analyses the principle of the bloelectric amplifier with the isolated stage of amplification,gives the main ratings of the thick film modules of amplification,introduces how to connect them and discusses the design of the bioelectric amplifer with the magnetic isolated stage and light isolated stage.

This paper introquces a new type of automatic alarm infusion apparatus, the principle is photogalvanic effect,direct control and sound-light alarm When the residual fluid in the bottle reaches a given value,it will give an alarm automatically to remind the nurse in time.Clinic practice showed that its accuracy is 100 percent. Because it is simple in structure and easy to operate,it can be widely used in hospitals.

Clinical Practice verified that the esophagusatrial pace technique canbe used to treat superventricular tachycardia,but the therapeutic effect is not ideal to atrialventricular node reentrant tachycardia.We adopted intraheart electronic pulse stimulation which could get satisfactory effect.It is considereb that it is a new the- rapeutical method of superventricular tachycardia.

Synthetic polymer oxy—enriching membrane has selective permeability for gases and under pressure,it can obtain enriched—oxygen air,provided for patient, from atmosphere.In this paper,a small size equiqment manufactured by self-made hollow-fiber oxy-enriching membrane module,its working principle,operating con- ditions and its working state under various operating conditions were discussed.Fina lly,the clinical practice of the epuipment was presented.

Type KNY otosalpingopiezograph(OSPG)is capable of determining the value of opening pressure of the auditory tube and recording the waveform of move- ment of the tympanic membrane.It can be emplbyed in both qualitative and quantita- tive analysis of the patency of the auditory tube.Dataprinting performed automatica- lly with clear waveforms not influenced by various environmental factors.

Objective To develop a port expander for simple network cable tester,which can raise the testing efficiency of the computer network twisted-pair.Methods Several RJ-45 sockets were used to connect the eight points separatedly according to the same arrangement order.One socket was connected to testing port by short twisted-pair,while other sockets were used as expander port.Results In practical test,the operation only needs one person,who could test the computer network twisteded-pair conveniently without going back and forth frequently between the two terminals of the tested line.Conclusion It is proved by testing that the port expander for the simple network cable tester can raise the testing efficiency of the computer network twist-pair.

Objective To correctly apply the Capability Maturity Model Integration(CMMI) model to the development process of medical device software,thus optimizing and improving the development process and enhancing the software process capability.Methods The matching between CMMI and IEC62304 was analyzed.The compatibility on application was investigated by taking risk management(the core process) as an example.Results The interface between CMMI and IEC62304 was discovered as well as their optimized process in risk management.Conclusion The process of medical device software development not only can be improved by CMMI model,but also should be.

We reported here a rapid biochemical system for identificationm of anaerobic bacteria by directly detecting cnzyme produced by cultured anaerobic colonial cells. Anaerobic bacteria suspension was prepared in pH7.4 bouillon yeast solution, a series of different substrates was added,then the mixture was incubated in 37~C for 4-6 hours.Various specific reactions could be shown by adding indicator or reagents.Our system is modified fromAPI 20 and similar to AN-IDENT,RAPID- ANA rapid enzyme methods 12 anaerolic strains of international standard were detected usind this system,the corresponding rate was 92.3%,while the average corresponding rate arrived at 87.5% after detecting 192 strains isolated in hospitals. We coneluded from the results thot this system is a rapid,simple and specific method for identification of anaerobic bacteria and can be applied to clinical and experimental use.