Class information for:
Level 1: GASEOUS STANDARD MIXTURES//CRITICAL FLOW VENTURI NOZZLE//CRITICAL NOZZLE

Basic class information
ID Publications Average number
of references		 Avg. shr. active
ref. in WoS
20114 412 17.1 36%


Bar chart of Publication_year

Last years might be incomplete

Classes in level above (level 2)


ID, lev.
above		 Publications Label for level above
1900 5364 OZONE FORMATION POTENTIAL//FORMALDEHYDE DETERMINATION//NON METHANE HYDROCARBONS

Terms with highest relevance score


Rank Term Type of term Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 GASEOUS STANDARD MIXTURES Author keyword 24 91% 2% 10
2 CRITICAL FLOW VENTURI NOZZLE Author keyword 15 88% 2% 7
3 CRITICAL NOZZLE Author keyword 15 73% 3% 11
4 SONIC NOZZLE Author keyword 13 61% 3% 14
5 STANDARD GAS MIXTURES Author keyword 6 80% 1% 4
6 DYNAMIC VOLUMETRIC METHOD Author keyword 6 100% 1% 4
7 IMMOBILIZED COMPOUNDS Author keyword 6 100% 1% 4
8 ORGAN STAND SECT 1 Address 4 67% 1% 4
9 CRITICAL PRESSURE RATIO Author keyword 4 56% 1% 5
10 GAS STANDARDS Author keyword 4 56% 1% 5

Web of Science journal categories

Author Key Words


Rank Web of Science journal category Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class		 LCSH search Wikipedia search
1 GASEOUS STANDARD MIXTURES 24 91% 2% 10 Search GASEOUS+STANDARD+MIXTURES Search GASEOUS+STANDARD+MIXTURES
2 CRITICAL FLOW VENTURI NOZZLE 15 88% 2% 7 Search CRITICAL+FLOW+VENTURI+NOZZLE Search CRITICAL+FLOW+VENTURI+NOZZLE
3 CRITICAL NOZZLE 15 73% 3% 11 Search CRITICAL+NOZZLE Search CRITICAL+NOZZLE
4 SONIC NOZZLE 13 61% 3% 14 Search SONIC+NOZZLE Search SONIC+NOZZLE
5 STANDARD GAS MIXTURES 6 80% 1% 4 Search STANDARD+GAS+MIXTURES Search STANDARD+GAS+MIXTURES
6 DYNAMIC VOLUMETRIC METHOD 6 100% 1% 4 Search DYNAMIC+VOLUMETRIC+METHOD Search DYNAMIC+VOLUMETRIC+METHOD
7 IMMOBILIZED COMPOUNDS 6 100% 1% 4 Search IMMOBILIZED+COMPOUNDS Search IMMOBILIZED+COMPOUNDS
8 CRITICAL PRESSURE RATIO 4 56% 1% 5 Search CRITICAL+PRESSURE+RATIO Search CRITICAL+PRESSURE+RATIO
9 GAS STANDARDS 4 56% 1% 5 Search GAS+STANDARDS Search GAS+STANDARDS
10 PERMEATION TUBE 4 56% 1% 5 Search PERMEATION+TUBE Search PERMEATION+TUBE

Key Words Plus


Rank Web of Science journal category Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ. in
class
1 SONIC NOZZLES 31 92% 3% 12
2 IMMOBILIZED COMPOUNDS 24 91% 2% 10
3 GAS STANDARDS 10 73% 2% 8
4 GASEOUS STANDARD MIXTURES 10 73% 2% 8
5 PERMEATION TUBES 9 64% 2% 9
6 SURFACE COMPOUNDS 5 29% 4% 16
7 MASS FLOW RATES 1 50% 0% 2
8 TUBE HUMIDITY GENERATOR 1 100% 0% 2
9 TRANSFER STANDARD 1 25% 1% 4
10 DETECTOR RESPONSE FACTORS 1 33% 0% 2

Journals

Reviews


Title Publ. year Cit. Active
references		 % act. ref.
to same field
Gravimetric methods for the preparation of standard gas mixtures 2011 15 23 43%
Standards and Traceability for Air Quality Measurements: Flow Rates and Gaseous Pollutants 2013 2 73 53%
New developments in preparation and use of standard gas mixtures 2014 1 36 64%
Global Water Flow Measurement and Calibration Facilities: Review of Methods and Instrumentations 2012 2 9 89%
Development of techniques of generation of gaseous standard mixtures 2005 17 75 53%
A review of permeation tubes and permeators 2000 11 3 100%
Characteristics, Chemical Modification Processes as well as the Application of Silica and its Modified Forms 2009 7 56 30%
Standard gas mixtures - indispensable reference materials in the analysis of gaseous media 2010 4 42 38%
Preparation of gaseous standard mixtures: Methods for controlling the amount of components generated in the process of thermal decomposition of immobilized compounds 2003 5 18 72%
TRENDS IN DEVELOPMENT OF TECHNIQUES OF PREPARATION OF GASEOUS STANDARD MIXTURES 1994 1 22 50%

Address terms


Rank Address term Relevance score
(tfidf)		 Class's shr.
of term's tot.
occurrences		 Shr. of publ.
in class containing
term		 Num. of
publ.
in class
1 ORGAN STAND SECT 1 4 67% 1.0% 4
2 FLUID FLOW GRP 3 45% 1.2% 5
3 ORGAN STAND SECT 2 67% 0.5% 2
4 FLOW 2 36% 1.0% 4
5 FLUID MEASUREMENT SECT 1 100% 0.5% 2
6 GAS FLOW STAND SECT 1 100% 0.5% 2
7 GAS METROL GRP 1 40% 0.5% 2
8 BNM LNE 1 50% 0.2% 1
9 ERNST RUSKA ERC MICROSCOPY SPECT ELE ONS 1 50% 0.2% 1
10 ESTADUAL EDUC TECHNOL PAULA SOUZA 1 50% 0.2% 1

Related classes at same level (level 1)


Rank Relatedness score Related classes
1 0.0000151432 BREAKTHROUGH VOLUMES//SOLID PHASE COLLECTION//ADSORBENT TUBE
2 0.0000087658 WATER DEW POINT//ATMOSPHERIC PRESSURE IONIZATION MASS SPECTROMETER//CAPACITOR SENSOR
3 0.0000076113 SULFUR COMPONENTS//SULFUR CHEMILUMINESCENCE DETECTION//SULFUR CHEMILUMINESCENCE DETECTOR
4 0.0000073188 GE AFTSBEREICH PROD//LFGB KONSUMGUTER//ABT MED DIENSTE HYG
5 0.0000065568 OZONE FORMATION POTENTIAL//NON METHANE HYDROCARBONS//STATE JOINT ENVIRONM SIMULAT POLLUT CON
6 0.0000062449 FLOW MEASUREMENT AND INSTRUMENTATION//CORIOLIS FLOWMETER//VORTEX FLOWMETER
7 0.0000061797 ACCREDITATION AND QUALITY ASSURANCE//PROFICIENCY TESTING//PROFICIENCY TEST
8 0.0000060221 ASTM F739//PERMEATION TESTING//UCLA OCCUPAT ENVIRONM HLTH
9 0.0000054204 THERMAL FLOW SENSOR//FLOW SENSOR//THERMAL FLOW SENSORS
10 0.0000050810 METHANE HAZARD//STRATA MECH//RESISTANCE TEMPERATURE SENSOR