Wyniki wyszukiwania - BazTech

1

A Simple Butterfly Particle Swarm Optimization Algorithm with the Fitness-based Adaptive Inertia Weight and the Opposition-based Learning Average Elite Strategy

Tong L., Dong M., Ai B., Jing C.

Fundamenta Informaticae

|

2018

|

Vol. 163, nr 2

205--223

EN

Particle swarm optimization (PSO) is a population-based stochastic optimization technique that can be applied to solve optimization problems. However, there are some defects for PSO, such as easily trapping into local optimum, slow velocity of convergence. This paper presents the simple butterfly particle swarm optimization algorithm with the fitness-based adaptive inertia weight and the opposition-based learning average elite strategy (SBPSO) to accelerate convergence speed and jump out of local optimum. SBPSO has the advantages of the simple butterfly particle swarm optimizer to increase the probability of finding the global optimum in the course of searching. Moreover, SBPSO benefits from the simple particle swarm (sPSO) to accelerate convergence speed. Furthermore, SBPSO adopts the opposition-based learning average elite to enhance the diversity of the particles in order to jump out of local optimum. Additionally, SBPSO generates the fitness-based adaptive inertia weight ω to adapt to the evolution process. Eventually, SBPSO presents a approach of random mutation location to enhance the diversity of the population in case of the position out of range. Experiments have been conducted with eleven benchmark optimization functions. The results have demonstrated that SBPSO outperforms than that of the other five recent proposed PSO in obtaining the global optimum and accelerating the velocity of convergence.

2

The Technological Parameter Optimization of Rapid Freeze Prototyping for 3D Tissue Scaffold Fabrication

Liu D., Liu Y., Jing C., Wang Q., Li Q., Hu Q.

Przegląd Elektrotechniczny

|

2012

|

R. 88, nr 9b

47-50

EN

When using the Rapid freeze prototype (RFP) process to fabricate 3D tissue bone scaffold, the selecting of technological parameters directly affects lap ratio, which is the foundation of continuous fabrication and scaffold quality. Through analyzing the force of non-solidified fiber, Velocity ratio, liquid temperature, solid content, nozzle diameter and row spacing have been chosen as the influence factors and the L16 (45) orthogonal experiments have been done The experiments result is that material viscosity and row spacing is the most important factors for lap ratio influence. Optimal parameters combination has been got by range analysis. Finally, the mixed solution of gelatin-chitosan experiment with the optimal parameters has successfully produced multilayer tissue bone scaffold, including multiple scale structure.

PL

W artykule zaprezentowano process wytwarzania materiałów trójwymiarowych metoda gwałtownego oziębiania – RFP (rapid freeze prototype). Materiałem wyjściowym jest mieszanina żelatyny i chitozanu. Na proces tworzenia struktury ma wpływ wiele czynników, takich jak: temperatura cieczy, zawartość składnika stałego, rozmiary węzłów, średnica i odstępy między rzędami.

3

Research on High Quality Nanofiber Electrospinning Manufacturing System:Detecting Method of Taylor-cone and Fiber diameter Control Strategy

Liu Y., Jing C., Liu D., Hu Q.

Przegląd Elektrotechniczny

|

2012

|

R. 88, nr 9b

17-21

EN

This paper designed the method to control the electrospinning process stability basing on the analysis of Taylor-cone, and built the electric field adjust method to control the fiber diameter basing on the finite element analysis, experiments results showed that the stability was improved and diameter could the adjusted in micro-nano level.

PL

W artykule zaprezentowano metodę sterowania procesu produkcji nanowłókien bazująca na stożku Taylora i wykorzystaniu pola elektrycznego do kontroli średnicy włókna.

4

Solid phase extraction and spectrophotometric determination of trace gold using 5-(4-carboxylphenylazo)-8-hydroxyquinoline

Huang Z., Huang F., Yang X., Wei Q., Jing C.

Chemia Analityczna

|

2007

|

Vol. 52, No. 1

93-101

EN

Synthesis and application of 5-(4-carboxylphenylazo)-8-hydroxyquinoline (5-CPAHQD) as a new chromogenic reagent for determination of gold has been described- Highly sensitive, selective, and fast method for determination of gold based on its rapid reaction with 5-CPAHQD and solid phase extraction of colored chelate on C12 phase (DODECYL cartridge) has been developed. In the presence of 0.005-0. l mol L-1 phosphoric acid solution and cetyl trimethyl ammonium bromide medium, 5-CPAHQD reacted with gold to form salmon-pink chelate of gold-to-5-CPAHQD molar ratio of 1:3. The chelate C12 was eluted from the cartridge with ethanol. Enrichment factor of 50 was achieved, in ethanolic medium molar absorptivity of the chelate was 1.99 x 105 L mol-1 cm-1 at 520nm. Beer's law was obeyed in the range of 0.01-1.2 μg mL-1 Relative standard deviation for eleven replicate determinations of 0.6 μg mL-1concentration was 1.21%. In the original sample detection limit was 0.01 μg L-1. The proposed method was applied to determination of trace gold in ore samples with good result.

PL

Opisano syntezę i zastosowanie 5-(4-karboksylofenyloazo)-8-hydroksychinoliny (5-CPAHQD) jako nowego odczynnika chromogenicznego do oznaczania złota. Opracowano wysokoczuJą. selektywną i szybką metodę oznaczania złota wykorzystując jego szybko przebiegającą reakcję z 5-CPAHQD i ekstrakcję barwnego chelatu na fazie C12. W środowisku 0,005-0,1 mol L-1 kwasu fosforowego i bromku cetylotrimetyloamoniowego złoto reaguje z 5-CPAHQD tworząc łososiowo-różowy chelat w stosunku molowym l :3. Chelat eluowano z kolumienki C12 etanolem. Współczynnik zatężania wynosił 50. W środowisku etanolowym absorpcja molowa chelatu przy 520 nm wynosiła 1,99 x 105 L mol"1 cnr'. Prawo Beera było spełnione wzakresie 0,0 1-1,2 μg mL-1. Względne odchylenie standardowe dla 11 oznaczeń przy stężeniu 0.6 μ.g wynosiło 1.2%. Wykrywalność w próbce początkowej wynosiła 0,01 7mu;g L-1. Zaproponowaną metodę zastosowano, z dobrym rezultatem, do oznaczania śladów złota w rudzie.

5

Catalytic spectrophotometric determination of osmium using diantipyrylphenylmethane derivatives

Huang Z., Hu Q., Yang G., Wang J., Jing C., Xu Q., Li Z.

Chemia Analityczna

|

2005

|

Vol. 50, No. 5

913-923

EN

A new catalytic kinetic spcctrophotometric method for the determination of osmium(IV) has been developed and possible mechanisms of catalytic reaction were discussed. The method was based on the catalytic effect of osmium on the oxidation of diantipyrylphenyl-methane derivatives: diantipyryl-(p-chloro)-phenylmethane (DA CM), diantipyryl- -(o-chloro)-phenylmethane (DA CM), and diantipyryl-(m-chloro)-phenylmethane (DAmCM) by bromate in H2SO4 medium at 90 š 0.5°C. Reaction progress was monitored spectrophotometrically by measuring the increase in the absorbance at 500. 495. and 505 nm, respectively for DA CM, DApCM, and DApCM. Calibration plots were constructed separately for each dye applied. They were linear in the following concentration ranges: 0.60-30.0; 0.50-40.0, and 0.40-35.0 μg L-1 for DApCM, DApCM, and DAmCM, respectively. The corresponding detection limits were 0.50, 0.40 and 0.30 μg L-1. Interferences from foreign ions present even in the 35-fold excess with respect to the Os(IV) content were negligible. The developed method provided high sensitivity and selectivity of Os(IV) determination. It was successfully applied to the determination of trace amount of osmium in exemplary ores and catalysts.

PL

Opracowano nową katalityczną, kinetyczną metodę oznaczania osmu(IV) oraz przedyskutowano możliwe mechanizmy katalitycznej reakcji. W metodzie wykorzystano katalityczne działanie osmu na reakcje utleniania przez bromian w środowisku H2SO4 przy temp. 90 š 0,5°C, pochodnych diantypirylofenylometanu, tj.: diantypyrylo-(p-chloro)metanu (DA CM). diantypirylo-(o-chloro)-fcnylometanu (DAr(CM) i diantypirylo- -(m-chloro)-fenylometanu (DAmCM). Przebieg reakcji monitorowano spektrofotornet-rycznie mierząc wzrost absorbancji przy 500. 495 i 505 nm odpowiednio dla DA CM, DAoCM, i DAmCM. Krzywe kalibracji wykreślano dla każdego barwnika osobno, przebieg liniowy wykazywały w zakresach odpowiednio: 0,60-30,0: 0,50-40,0 i 0,40-35,0 μ g L-1. Granice wykrywalności wynosiły odpowiednio: 0.50, 0,40 i 0,30 &mu g L-1. Wpływ obcych jonów okazał się nieistotny nawet przy 35-ciokrotnym nadmiarze w stosunku do Os(IV). Opracowana metoda charakteryzuje się dużą czułością i selektywnością w stosunku do Os(IV). Metodę zastosowano z powodzeniem do oznaczania śladowych ilości osmu w wybranych rudach i katalizatorach.