ACCELERATING THE DEVELOPMENT OF MATHEMATICAL AND PHYSICAL SCIENCES

This article discusses the important role of mathematical and physical sciences in, and their influence on, the development of natural science and modern technology, as well as social science and the humanities. On the basis of the present situation in China, it calls for accelerating the development of the mathematical and physical sciences.

Development of Physical Library for Short Channel CMOS / SOI Integrated Circuits

An 'Integrated Device and Circuit simulator' for thin film (0.05-0.2μm) submicron (0.5μm) and deep submicron (0.15, 0.25,0.35μm) CMOS/ SOI integrated circuit has been developed. This simulator has been used for design and fabrication and physical library development of thin film submicron and deep submicron CMOS/ SOI integrated circuit.

THE MONITORING FOR PHYSICAL DEVELOPING PROCESS WITH A LINEAR CCD

In this work, we used a linear CCD to detect the whole physical developing process of silver diffusion transfer reversal process in photographic chemistry. The influence of the ingredient of the working solution was studied.

A Clinical Analysis of Physical and Neurological Development in very Low Birth Weight Infants with MEIR(Massage,Exercises,Intelligence training,and Rehabilitation training)

Objective:This study aimed to investigate the application of MEIR(Massage,Exercises,Intelligence training,and Rehabilitation training)in Chinese VLBW infants and to observe its effects on infants’growth and deve1opment.Methods:Clinical data of 92 VLBW infants who were treated at the neonatal intensive care unit(NICU)of Loudi Centra1 Hospital were retrospectively analyzed.The patients were grouped as the MEIRgroup(n=47)and controls(n=45).Physical and neurodevelopment deve1opment were compared between the two groups.Results:There were differences in height and weight and head circumference between the two groups at all corrected ages(all P<0.05).Abnormal motions,reflexes,muscular tension,audio-visual reactions,and posture,and the total numbers of abnormalities of 3-,6-,9-and 12-corrected month-old infants in the MElRgroup were 1ower than in the control group(all P<0.05).The mental development index and psychomotor development index of 6-and 12-corrected month infants in the MEIR group were higher than in the control group(all P<0.05).Conclusion:MEIR could improve the physical and neurological developments of VLBW infants,reduce the incidence of adverse events,and improve their growth and development.

Significant Breakthrough in Industrial Test of the "Methanol to Olefins" Process Developed by Dalian Institute of Chemical Physics,Chinese Academy of Sciences

A process of ＂Methanol or Dimethylether to Olefins＂ developed by Dalian Institute of Chemical Physics （DICP）, designated as the DMTO process, has attained great success in industrial scaling up testing. DICP, by collaborating with the Xinxing Coal Chemical Co., Ltd. of Shaanxi Province and the Luoyang Petrochemical Engineering Co. of the SINOPEC Group, operated successfully a 50t（methanol）/d unit for the conversion of methanol to lower olefins, with a methanol conversion of close to 100%, and a selectivity to lower olefins（ethylene, propylene and butylenes） of higher than 90%. On 23rd August, the industrial test project has passed a state appraisal. The experts of the Appraisal Group, headed by Prof. YUAN Qingtang, academician of Chinese Academy of Engineering, drew the conclusions that the DMTO process, by utilizing a proprietary SAPO-34 catalyst system and a recycling fluidized bed reaction system for the production of lower olefins from methanol, is the first unit in the world having a capacity of producing nearly ten thousand tons lower olefins per year. The technological level of the industrial test is at a leading position internationally. This accomplishment will provide a sound base for the subsequent commercialization of the DMTO process.

Career Performance Progressions of Junior and Senior Elite Track and Field Athletes

Purpose To compare and assess differences in the career performance progressions of elite junior and Olympic track and field athletes.Methods Annual best performances from top 8 men and women(e.g.finalists)in track and field events at the 2000 World Junior Championships(junior cohort)and the 2000 Olympic Games(Olympic cohort)were examined.Annual bests of these finalists were tracked each year from select groups:sprints(100 m,200 m),distance(1500 m,5000 m),jumps(long jump,high jump),throws(discus,shot put).Age of best lifetime performance,age of final posted performance,and improvement from junior-age best to lifetime best performance were compared between groups.Results Olympic finalists achieved lifetime best performances at later ages than junior finalists[26.0±4.0 years vs.21.1±3.5 years;age difference 90%CI(3.7-5.2 years),P<0.001],and this significant age difference between cohorts was found within all four groups.Olympic finalists improved from under-20 best to lifetime best more so than junior finalists[6.1±4.8%vs.2.5±2.3%;Age difference 90%CI(2.5-4.8%),P<0.001].Of 130 junior finalists,54 did not improve after age 19,while 19 of 128 Olympic finalists posted no improvement after age 19.Conclusion The data suggest that these two populations have different career performance progressions and challenge the notion that achieving elite success as a junior athlete is a prerequisite for the same success at the senior level.