http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Lead-Lag PSS Design Based on H∞ Control Theory and Genetic Algorithm
Dharam Singh noroji,Rakesh narvey 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.7
The aim of this paper is to explain the way to scale back the dimension of an influence system stabilizer (PSS) supported H∞ management theory. In recent years, sturdy PSS styles that adopt associate in nursing H∞ controller are investigated so as to ensure the performance once the state of the system configuration and power flow modification. However the H∞ controller has not been wide adopted into sensible use attributable to the tangled nature of its theory and structure. We tends to think about the H∞ management downside below the condition that PSS structure is mounted to be a lead-lag compensator. Infinity norm of transfer function from disturbance to output is subjected to be minimized via searching and evolutionary computation. The resulted optimal parameters make the system stable and also guarantee robust performance. We applied the evolutionary robust controller to a pneumatic servo system. For performances comparison, three controllers; PID with derivative first order filter controller, PI controller and H- loop shaping controller are investigated. We tends to optimize the parameters of the Lead-Lag PSS by a genetic algorithm program that has associate in nursing analysis perform that takes under consideration a closed-loop system H∞ norm and a desired response. During this manner, we tends to design a PSS that encompasses a standard managementler structure and guarantees its control performance.
Abrol, Dharam-Pal,Singh, Jang-Bahadur Korean Society of Applied Entomology 2003 Journal of Asia-Pacific Entomology Vol.6 No.1
Six insecticides and Heir eight combinations were tested for their efficacy against brinjal fruit and shoot borer, Leucinodes orbonalis. Endosulfan + deltamethrin (0.07%, 0.0025%) and endosulfan + fenvalerate (0.07% + 0.005%) were highly effective against fruit borer that recorded only 13.3% damage as compared to 69.8% in control. The other promising treatments which significantly reduced the fruit damage over the control were in the order: carbaryl + fenvalerate = dichlorvos + fenvalerate (14.9%) > malathion + fenvalerate (16.4%) > fenvalerate + deltamethrin (16.6%) > dichlorvos = carbaryl + deltamethrin = malathion = dichorvos + deltamethrin = malathion + deltamethrin (18.3%) > endosulfan (20.0%) > carbaryl (21.6%) with mean percentage of damage 14.9, 16.4, 18.3, 20.0, 21.6 and 69.8%, respectively. Carbaryl was least effective, but its combinations with pyrethroids were proved superior over carbaryl alone. Cost - benefit ratio ranged from a minimum of 1: 5.10 (carbaryl) to a maximum of 1: 20.44 (fenvalerate). Dichlorvos + fenvalerate combination gave the highest yield of 263.45 q/ha, whereas carbaryl was least effective giving 225.7 q/ha. with a net gain of Rupees 42,443.00 (US$ 886.00) and 28,141.00 (US$ 587.49), respectively. The other treatments were intermediate between the two insecticide regimes. However, all the treatments were superior over the control which produced 113.58 q/ha with a net gain of Rupees 340.00 only.
Kumar, Sunil,Dhillon, Santosh,Singh, Dharam,Singh, Randhir The Korean Society of Food Science and Nutrition 2004 Preventive Nutrition and Food Science Vol.9 No.3
Superoxide dismutase (SOD) from tomato (Lycopersicon esculentum Mill.) fruit was purified by ammonium sulphate precipitation, Sephadex G-100 and DEAE-cellulose column chromatographies. A 22 fold purification and an overall yield of 44% were achieved. The purified enzyme was a homodimer with Mr 37.1 kDa and subunit Mr 18.2 kDa as judged by SDS-PAGE. SOD showed $K_{m}$ values of 25 ${\times}$ 10$^{-6}$ M and 1.7 ${\times}$ 10$^{-6}$ M for nitroblue tetrazolium (NBT) and riboflavin as substrates, respectively. The enzyme was thermostable upto 5$0^{\circ}C$ and exhibited pH optima of 7.8. The effect of metal ions and some other compounds on enzyme activity was studied. $Co^{2+}$ and $Mg^{2+}$ were found to enhance relative enzyme activities by 27 % and 73 %, respectively, while M $n^{2+}$ inhibited the SOD activity by 64%. However, $Ca^{2+}$ and C $u^{2+}$ had no effect on enzyme activity. Other compounds like $H_2O$$_2$ and Na $N_3$ inhibited enzymatic activities by 60% and 32%, respectively, while sodium dodecyl sulphate (SDS), chloroform plus ethanol and $\beta$-mercaptoethanol had no effect on the activity of SOD. of SOD.
Sunil Kumar,Santosh Dhillon,Dharam Singh,Randhir Singh 한국식품영양과학회 2004 Preventive Nutrition and Food Science Vol.9 No.3
Superoxide dismutase (SOD) from tomato (Lycopersicon esculentum Mill.) fruit was purified by ammonium sulphate precipitation, Sephadex G-100 and DEAE-cellulose column chromatographies. A 22 fold purification and an overall yield of 44% were achieved. The purified enzyme was a homodimer with Mr 37.1 kDa and subunit Mr 18.2 kDa as judged by SDS-PAGE. SOD showed K_m values of 25×10^(-6) M and 1.7×10^(-6) M for nitroblue tetrazolium (NBT) and riboflavin as substrates, respectively. The enzyme was thermostable upto 50℃ and exhibited pH optima of 7.8. The effect of metal ions and some other compounds on enzyme activity was studied. Co^(2+) and Mg^(2+) were found to enhance relative enzyme activities by 27% and 73%, respectively, while Mn^(2+) inhibited the SOD activity by 64%. However, Ca^(2+) and Cu^(2+) had no effect on enzyme activity. Other compounds like H₂O₂ and NaN₃ inhibited enzymatic activities by 60% and 32%, respectively, while sodium dodecyl sulphate (SDS), chloroform plus ethanol and β-mercaptoethanol had no effect on the activity of SOD.
Combining Total Geological History and Other Approaches in Resolving Construction Dispute
( Abd Rasid Jaapar ),( Afiq Farhan Abd Rahim ),( Mohd Farid Mohd Dali ),( Dharam Singh ),( Mohd Fadhil Jasmee ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
A dispute arose between Project Owner and Contractor over payment of the completed earthworks. The dispute was referred to arbitration on the volume of geomaterial had been excavated. Basically, it was an old issue on rock or no rock! The Contractor claimed the geomaterial is rock while the Project Owner claimed the geomaterial is not rock. A multidisciplinary geo-team, including engineering geologists, geotechnical engineers and GIS analysts was gathered to prepare the report. The approaches to the arbitration case used were the application of the total geological history, rock strength and SPT N-value to classify the ground while GIS was used to calculate the volume of geomaterial. The site-specific geological model is based on consideration of the regional and local geological and geomorphological history and of the current ground surface conditions. Results from boreholes were studied together with separate laboratory testing results of rock samples collected by the client during construction works. Extrapolation of rockhead was based on UCS ≥ 50 N60 (kPa). The volume calculation of rocks excavated was conducted using boreholes where rockhead had been identified together with as-built ground level (finish level). In this paper, the practical strategies involved in the total geology history approach as well as rock strength and SPT N-value are identified by describing its application for construction dispute.