The Effects of Thermal Radiation and Viscous Dissipation on the Stagnation Point Flow of a Micropolar Fluid over a Permeable Stretching Sheet in the Presence of Porous Dissipation

In this paper,the effects of thermal radiation and viscous dissipation on the stagnation–point flow of a micropolar fluid over a permeable stretching sheet with suction and injection are analyzed and discussed.A suitable similarity transformation is used to convert the governing nonlinear partial differential equations into a system of nonlinear ordinary differential equations,which are then solved numerically by a fourth–order Runge–Kutta method.It is found that the linear fluid velocity decreases with the enhancement of the porosity,boundary,and suction parameters.Conversely,it increases with the micropolar and injection parameters.The angular velocity grows with the boundary,porosity,and suction parameters,whereas it is reduced if the micropolar and injection parameters become larger.It is concluded that the thermal boundary layer extension increases with the injection parameter and decreases with the suction parameter.

Plasma L-ENK, AVP, ANP and serum gastrin in patients with syndrome of Liver-Qi-stagnation

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Operational feasibility study of stagnation pressure reaction control for a mid-caliber non-spinning projectile

Controlled,guided munitions can reduce dispersion in the shot,while providing the capability of engaging both stationary and maneuvering targets.The Netherlands Organisation for Applied Scientific Research has developed a fin-less control technology called Stagnation Pressure Reaction Control(SPRC)that takes stagnation pressure air and directs it sideways to control non-spinning projectiles.In a previous study,this technology was demonstrated at Mach 2 wind-tunnel conditions to achieve up to 1.5°controllable angle of incidence for a non-spinning,aerodynamically unstable projectile-like test object.In an operational scenario,the decelerating projectile will experience a decline in control force while the simultaneous forward shift of the center of pressure increases the need for control force.Furthermore,angles of incidence exceeding 1.5°will be experienced under realistic flight conditions,especially against maneuvering targets.This work addresses these challenges and presents an operational feasibility study for a practical application of SPRC in a non-spinning mid-caliber gun-launched projectile,using experiment data on control latency and force of the earlier study.It illustrates the combined effect of the control-and stability dynamics and underlines the potential of an SPRC projectile as a precisionoperation ammunition.This research revealed that SPRC technology can stabilize and control the hypothesized projectile in a direct fire scenario against stationary and maneuvering targets.

A Clinical Study on the Treat ment of Chronic Pelvic Inflammation of Qi-stagnation with Blood Stasis Syndrome by Penyanqing Capsule (盆炎清胶囊)

Objective： To observe the clinical efficacy of Penyanqing Capsule （盆炎清胶囊, PYQC） in treating pelvic inflammation of Qi-stagnation with blood stasis syndrome. Methods： The randomized, single blinded, parallel positive drug controlled method was adopted, with 82 patients assigned into two groups by envelop method. The 42 patients in the treated group received PYQC 3 times a day, 4 capsules each time taken orally; the 40 patients in the control group were given orally Fuyankang tablets （妇炎康片, FYKT） 3 times a day, 6 tablets each time. The therapeutic course for both groups was 2 months, and 2 courses of treatment were given successively to observe the comprehensive effect, changes of symptoms and signs before and after treatment. The effects of PYQC on hemorrheological character in part of the patients and on the pathogenetic chlamydia and mycoplasma were also observed. Results： The total effective rate in the treated group was 83.3%, which was insignificantly different from that in the control group （77.5%, P〉0.05）. However, PYQC could significantly lower the hemorrheologic indexes in patients and showed definite influence on the pathogenetic chlamydia and mycoplasma. Conclusion： PYQC has good therapeutic effect in treating chronic pelvic inflammation of Qi-stagnation with blood stasis syndrome, and showed definite effect on chlamydia and mycoplasma.

Three-dimensional mixed convection stagnation-point fow past a vertical surface with second-order slip velocity

This study is concerned with the three-dimensional(3D)stagnation-point for the mixed convection flow past a vertical surface considering the first-order and secondorder velocity slips.To the authors’knowledge,this is the first study presenting this very interesting analysis.Nonlinear partial differential equations for the flow problem are transformed into nonlinear ordinary differential equations(ODEs)by using appropriate similarity transformation.These ODEs with the corresponding boundary conditions are numerically solved by utilizing the bvp4c solver in MATLAB programming language.The effects of the governing parameters on the non-dimensional velocity profiles,temperature profiles,skin friction coefficients,and the local Nusselt number are presented in detail through a series of graphs and tables.Interestingly,it is reported that the reduced skin friction coefficient decreases for the assisting flow situation and increases for the opposing flow situation.The numerical computations of the present work are compared with those from other research available in specific situations,and an excellent consensus is observed.Another exciting feature for this work is the existence of dual solutions.An important remark is that the dual solutions exist for both assisting and opposing flows.A linear stability analysis is performed showing that one solution is stable and the other solution is not stable.We notice that the mixed convection and velocity slip parameters have strong effects on the flow characteristics.These effects are depicted in graphs and discussed in this paper.The obtained results show that the first-order and second-order slip parameters have a considerable effect on the flow,as well as on the heat transfer characteristics.

Structure and function of the fecal-associated microbiome in qi stagnation constitution

Objective:To clarify the structural and functional characteristics of the gut microbiota in individuals with qi stagnation constitution(QSC)and identify the potential biomarkers related to QSC.Methods:This cross-sectional study involved individuals with QSC and balanced constitution(BC)confirmed by TCM clinicians.The clinical features were recorded,and fecal samples were collected for 16S rDNA sequencing.The structure of the fecal-associated microbiome(FAM)was described by the alpha-diversity indexes,beta-distances,and relative abundances of dominant taxa.The differences in FAM distribution were analyzed by the Wilcoxon rank-sum test,MetagenomeSeq,and LEfSe analysis.The 16S rDNA gene sequences were assigned to the KEGG dataset to predict the functional information of bacterial metabolic pathways by using PICRUSt.Differences in functional pathways between groups were assessed with the Wilcoxon rank-sum test.The ROC curve based on specific operational taxonomic units(OTUs)was constructed,and the AUC was calculated.Results:Twenty-two individuals with BC and 8 with QSC were recruited.Significant differences between the two groups were found in body mass index,health status,and low-density lipoprotein,etc.There was no significant difference in the alpha-diversity index.PCoA showed no evident clustering of bacterial communities according to constitutions.Bacteroidaceae,Lachnospiraceae,Ruminococcaceae,and Prevotellaceae were the four common bacteria with high abundances.Notably,MetagenomeSeq,LEfSe analysis,and the Wilcoxon rank-sum test identified significantly different distributions of 66,42,and 36 OTUs,respectively.Predictive function analysis showed that 13 metabolic pathways were significantly differentially distributed,including those related to fatty acid synthesis.Five specific OTUs were selected as potential biomarkers of a QSC,and the AUC was 0.94.Conclusion:Individuals with QSC have unique FAM structure and related functional characteristics.Five specific OTUs were identified to serve as potentially effective biomarkers related to QSC.

Study on the relationship between syndrome characteristics degree and inflammatory factor and negative emotional scale in"double heart disease"patients with Qi stagnation blood stasis and heart gallbladder heat stagnation

Objective:To Discuss the correlation between Hypersensitivity C-reactive Protein(Hs-CRP),Total Cholesterol(TC),Triglyceride(TG),negative emotion scale and TCM syndrome scores in“Double Heart Disease”patients with Qi stagnation blood stasis and heart gallbladder heat stagnation.Method:Fifty-two patients in Western Medicine Diagnosis of Double Heart Disease,in TCM syndrome identified as Qi stagnation blood stasis Heart gallbladder heat stagnation syndrome,detects it Hs-CRP,TC,TG levels by ELISA,use TCM Syndromes Scale to evaluate TCM Syndrome,use the Pittsburgh Sleep Quality Index(PSQI)and Self-rating symptom scale(SCL-90)to assess anxiety and sleep levels,analyze the correlation between TCM syndrome scores and Hs-CRP,TC,TG level,PSQI index,SCL-90 index.Result:There was a significant positive correlation between Hs-CRP,TG level and TCM Syndrome scores(P<0.05);TC level was postively correlated with TCM Syndrome scores,but there was no statistical significance(P>0.05);There was a significant positive correlation between PSQI index,SCL-90 index and TCM Syndrome scores(P<0.05).Conclusion:In“Double Heart Disease”patients with Qi stagnation blood stasis and heart gallbladder heat stagnation,there have characteristic syndrome changes in terms of inflammatory factor level,blood lipid level and negative emotion score;Which the above indexes can reflect the severity of TCM syndromes to a certain extent and provide the basis for the effective intervention treatment of TCM.

Rules of Ren Shunping's prescription for trearing Spleen Deficiency and Qi Stagnation Syndrome of Functional Dyspepsia Based on Data Mining

Objective:To explore the medication rules of Professor Ren Shunping treating spleen deficiency and qi stagnation syndrome of functional dyspepsia,so as to provide reference for clinical prevention and development of new drugs.Methods:The 144 Chinese herbal formulas considered as active prescribed by professor Ren Shunping for the first time treating the patients with spleen deficiency and qi stagnation syndrome of functional dyspepsia were collected,entered into TCM inheritance auxiliary platform(V2.5),and then mined by some data mining methods of the software,such as the association rules and unsupervised entropy hierarchical clustering.Results:This study involved 144 Chinese herbal formulas,including a total of 56 Chinese herbal medicines.Of these Chinese herbal medicines,the herbs of cold and warm nature,and pungent,bitter and sweet in flavors were used in a quite high frequency,all of which act on spleen,stomach,lungs,large intestine,liver and gallbladder meridians.One core Chinese herbal formula was excavated,composed of patchouli,perilla stem,radix bupleuri,scutellaria,ginger pinellia,codonopsispilosula,magnolia bark,tangerine peel,large-headed atractylodes,immature bitter orange,wood incense,fructus amomi,inula britannica chinensis,ginger,medicated leaven,fried rice and fried malt based on the association rules.And a total of 17 groups of core used drugs and 2 groups of new Chinese herbal formulas undiscovered were mined based on unsupervised entropy hierarchical clustering.Conclusion:In treating spleen deficiency and qi stagnation syndrome of functional dyspepsia,professor Ren is good at treating spleen deficiency and qi stagnation syndrome of functional dyspepsia from the perspective of"tong jiang",using the"five-in-one"strategy of strengthening the spleen,evacuating the liver,coming down qi from the stomach,dispersing lung,and bowel-reflexing to treat patients as a whole.And the herbal medicines were light in dose,lovely and mild in nature for the formulars.At the same time,he paid attention to the combination of syndromes and symptoms,and flexible arbitration.

Discussion on reprogramming of tumor energy metabolism and intervention of traditional Chinese medicine based on the theory of“collateral Q i stagnation”

The theory of stagnation of collateral Qi(Chinese medicine refers to the most fundamental and subtle substances thatconstitute the human body and maintain life activities,and also has the meaning of physiological functions)originates from the theory of collateral disease,which refers to the deficiency of Qi in the body’s collaterals,the loss of Qi and blood,and the failure of stagnation of collateral Qi,which leads to the loss of Qi,blood and body fluid,and the formation of pathological products such as deficiency,depression,phlegm,blood stasis in the local area,and ultimately damage the pathological process of collaterals.Based on the in-depth study of the pathogenesis of collateral Qi stagnation and the previous study of meridian channels,we believe that the key pathogenesis of the formation,evolution and spread of malignant tumors is“collateral Qi deficiency stagnation,collateral Qi stagnation and collateral Qi decay”.As an important energy resonance channel of the body,meridians play a key role in the process of material transformation and energy metabolism.It is believed that the small focus caused by the pathogenesis of stagnation is the cause of malignant transformation of tumor,the reprogramming of energy metabolism induced by the lesion of collateral Qi is the basis of the progress of tumor pathogenesis,and the formation of tumor microenvironment regulated by the tumor toxin vena is the root of alienation of tumor development.Guided by this theory,focusing on the correlation between collateral Qi and tumor energy metabolism,using Professor Hua Baojin's treatment method of“Regulating Qi and detoxifying”to prescribe drugs can adjust collateral Qi function,achieve the relative balance of internal environment,and then inhibit the progress of tumor.Based on the above understanding,this study tries to enlighten new diagnosis and treatment ideas under the guidance of“stagnation of collateral Qi”in traditional Chinese medicine,in order to provide some theoretical support for the intervention of traditional Chinese medicine in the process of tumor development.

Biological basis of “depression with liver-qi stagnation and spleen deficiency syndrome”: A digital gene expression profiling study

Objective:To investigate the biological basis of“depression with liver-qi stagnation and spleen deficiency syndrome”.Methods:A digital gene expression profiling method was conducted to explore global changes in the mRNA transcriptome in a rat model of depression with liver-qi stagnation and spleen deficiency syndrome.Real-time quantitative polymerase chain reaction(q-PCR)was performed to verify the five genes most interest based on the Kyoto Encyclopedia of Genes and Genome(KEGG)analysis.Sini San,which disperses stagnated liver qi and strengthens the spleen,was administered to the model rats to observe whether it could reverse these genetic changes in the liver.Results:Forty-six differentially expressed genes were identified.Three of the five genes of most interestdHnf4a,Hnf4g and Cyp1a1dbased on KEGG analysis,were confirmed by realtime q-PCR.Sini San reduced the gene expression changes of Hnf4a,Hnf4g and Cyp1a1 in the rat model.Conclusions:Hnf4a,Hnf4g and Cyp1a1 are involved in“depression with liver-qi stagnation and spleen deficiency syndrome”.These findings indicate that depressed rats with liver-qi stagnation and spleen deficiency syndrome are at risk of liver diseases.Furthermore,our results will inform exploration of the etiology of depression and help in the development of effective therapeutic strategies.

Analysis of the relationship between liver-qi stagnation and premature ovarian failure based on exosomes

The incidence of premature ovarian failure,which is related to women’s excessive pressure and mental tension,has increased in recent years.Premature ovarian failure has become one of the diseases that seriously disturb women’s physical and mental health,and its incidence can be regarded as liver depression and qi stagnation.Patients have an increasing demand for treatment,not only for fertility with the improvement of social living standards and the development of healthcare technology.Exosomes,as small membrane vesicles containing complex RNA and proteins,have the function of mediating cell communication and transmitting information in the pathological state caused by liver-qi stagnation.Exosomes in the hypoxic microenvironment can protect cells from damage and promote the pathological process.Moreover,exosomes in an inflammatory environment can play an active anti-inflammatory role.Exosomes can reduce the apoptosis of granulosa cells by expressing miRNA and so on to restore ovarian function.The purpose of treating premature ovarian failure can be achieved in this way.This paper introduced the relationship between the three,discussed the guiding significance of Chinese medicine theories in the treatment of exosomes and premature ovarian failure,and provided new research ideas for the treatment of integrated traditional Chinese medicine and western medicine.

Pharmacological effects of Paeoniflorin and Albiflorin on IL-3, GM-CSF, IL-6 and TNF-α in the rats of syndrome of stagnation of liver qi and blood deficiency

目的：观察芍药苷（PF）、芍药内酯苷（AF）对血虚肝郁证候模型大鼠外周血细胞、脏器指数、造血细胞因子的影响,探讨白芍养血柔肝功效的物质基础及作用机制.方法：将SD雄性大鼠,根据体质量随机分组,每组12只.除空白组外,其余均采用放射线辐照结合慢性束缚应激复制血虚肝郁证候模型.观察大鼠体质量、脏器指数,并监测外周全血中白细胞（WBC）、红细胞（RBC）、血红蛋白（HGB）的数量,分离血清用放射免疫法（RIA）检测大鼠白细胞介素-3（IL-3）、粒细胞-巨噬细胞集落刺激因子（GM-CSF）、白细胞介素-6（IL-6）、肿瘤坏死因子-α（TNF-α）的含量.结果：与模型组比较,PF30mg·kg^-1组和AF30mg·kg^-1组体质量、脾脏指数、白细胞数量明显增加（P〈0.05、P〈0.01）.RIA结果显示,PF30mg·kg^-1组和AF30mg·kg^-1组均可增加该组IL-3含量（P〈0.05、P〈0.05）和减少该组TNF-α含量（P〈0.05、P〈0.05）.结论：芍药苷、芍药内酯苷通对骨髓造血系统和免疫系统的调节作用,发挥对血虚肝郁大鼠的补血作用,提示二者均为白芍养血柔肝功效的主要有效成分.

Mechanism and numerical simulation of pressure stagnation during water jetting perforation

When perforating with an abrasive water jet, it is possible that the pressure in the hole （perforation） will be higher than that in the annulus because of water jet blasting against the hole wall, which also is the theoretical basis for the technology of hydro-jet fracturing. This paper analyzes the mechanism of generating pressure stagnation in water jet hole, and puts forward a new concept of hydroseal. Then, the distribution of pressure in the hole was simulated with the finite element method. The simulation results showed that the pressure in the hole was higher than that in the annulus. Also, the lower the annular pressure （confining pressure） and the higher the blasting pressure, the greater the pressure difference. An experiment indicated that the cement sample was lifted up under the pressure stagnation in the hole, which proved the finite element simulation results obviously.

A Clinical Study of Safflower Yellow Injection in Treating Coronary Heart Disease Angina Pectoris with Xin-Blood Stagnation Syndrome

Objective： To evaluate the clinical effect and safety of Safflower Yellow injection （SYI） in treating coronary heart disease angina pectoris （OHD-AP） with Xin-blood stagnation syndrome （XBSS）. Methods： Adopted was the multi-centered, randomized, positive parallel controlled method, 448 patients with CHD-AP-XBSS were enrolled and divided into two groups, 336 in the tested group treated with SYI and 112 in the control group treated with Salvia injection by intravenous dripping once a day for 14 days, so as to observe the conditions of angina, electrocardiogram, and therapeutic effect on traditinal Chinese medicine （TCM） symptoms as well as the safety of the treatment. Results： The significantly effective rate and total effective rate in the tested group were 60.06% （194/323） and 91.02 % （294/323） respectively; those in improvement of TOM symptoms were 40. 18% （129/321） and 75.23% （243/323） respectively, which were better than those in the control group （P〈0.01）. Conclusion： SYI Injection is effective and safe in treating OHD-AP-XBSS.

Effects of variable properties on MHD heat and mass transfer flow near a stagnation point towards a stretching sheet in a porous medium with thermal radiation

The effect of variable viscosity and thermal conductivity on steady magnetohydrodynamic（MHD） heat and mass transfer flow of viscous and incompressible fluid near a stagnation point towards a permeable stretching sheet embedded in a porous medium are presented,taking into account thermal radiation and internal heat genberation/absorbtion.The stretching velocity and the ambient fluid velocity are assumed to vary linearly with the distance from the stagnation point.The Rosseland approximation is used to describe the radiative heat flux in the energy equation.The governing fundamental equations are first transformed into a system of ordinary differential equations using a scaling group of transformations and are solved numerically by using the fourth-order Rung-Kutta method with the shooting technique.A comparison with previously published work has been carried out and the results are found to be in good agreement.The results are analyzed for the effect of different physical parameters,such as the variable viscosity and thermal conductivity,the ratio of free stream velocity to stretching velocity,the magnetic field,the porosity,the radiation and suction/injection on the flow,and the heat and mass transfer characteristics.The results indicate that the inclusion of variable viscosity and thermal conductivity into the fluids of light and medium molecular weight is able to change the boundary-layer behavior for all values of the velocity ratio parameter λ except for λ = 1.In addition,the imposition of fluid suction increases both the rate of heat and mass transfer,whereas fluid injection shows the opposite effect.

An application of interacting shear flows theory: exact solution for unsteady oblique stagnation point flow

An analytical solution of the governing equations of the interacting shear flows for unsteady oblique stagnation point flow is obtained. It has the same form as that of the exact solution obtained from the complete NS equations and physical analysis and relevant discussions are then presented.

Wavelet analysis of stagnation point flow of non-Newtonian nanofluid

The wavelet approach is introduced to study the influence of the natural convection stagnation point flow of the Williamson fluid in the presence of thermophysical and Brownian motion effects. The thermal radiation effects are considered along a permeable stretching surface. The nonlinear problem is simulated numerically by using a novel algorithm based upon the Chebyshev wavelets. It is noticed that the velocity of the Williamson fluid increases for assisting flow cases while decreases for opposing flow cases when the unsteadiness and suction parameters increase, and the magnetic effect on the velocity increases for opposing flow cases while decreases for assisting flow cases. When the thermal radiation parameter, the Dufour number, and Williamson’s fluid parameter increase, the temperature increases for both assisting and opposing flow cases. Meanwhile, the temperature decreases when the Prandtl number increases. The concentration decreases when the Soret parameter increases, while increases when the Schmidt number increases. It is perceived that the assisting force decreases more than the opposing force. The findings endorse the credibility of the proposed algorithm, and could be extended to other nonlinear problems with complex nature.

Change in internal energy of thermal diffusion stagnation point Maxwell nanofluid flow along with solar radiation and thermal conductivity

This paper concerns the characteristics of heat and mass transfer in upper convected Maxwell fluid flow over a linear stretching sheet with solar radiation,viscous desperation and temperature based viscosity.After boundary layer approximation,the governing equations are achieved(namely Maxwell,upper convected material derivative,thermal and concentration diffusions).By using the self-similarity transformations the governing PDEs are converted into nonlinear ODEs and solved by RK-4 method in combination with Newton Raphson(shooting technique).The effects of developed parameters on velocity,temperature,concentration,fraction factor,heat and mass diffusions are exemplified through graphs and tabular form and are deliberated in detail.Numerical values of fraction factor,heat and mass transfer rates with several parameters are computed and examined.It is noticed that the temperature is more impactable for higher values of radiative heat transport,thermal conductivity and viscous dissipation.The comparison data for some limiting case are acquired and are originated to be in good agreement with previously published articles.

Partial slip effect on non-aligned stagnation point nanofluid over a stretching convective surface

The present study inspects the non-aligned stagnation point nano fluid over a convective surface in the presence of partial slip. Two types of base fluids namely water and kerosene are selected with Cu nanoparticles. The governing physical problem is presented and transformed into a system of coupled nonlinear differential equations using suitable similarity transformations. These equations are then solved numerically using midpoint integration scheme along with Richardson extrapolation via Maple. Impact of relevant physical parameters on the dimensionless velocity and temperature profiles are portrayed through graphs. Physical quantities such as local skin frictions co-efficient and Nusselt numbers are tabularized.It is detected from numerical computations that kerosene-based nano fluids have better heat transfer capability compared with water-based nanofluids. Moreover it is found that water-based nanofluids offer less resistance in terms of skin friction than kerosene-based fluid. In order to authenticate our present study, the calculated results are compared with the prevailing literature and a considerable agreement is perceived for the limiting case.

Momentum and heat transfer of a special case of the unsteady stagnation-point flow

This paper investigates the unsteady stagnation-point flow and heat transfer over a moving plate with mass transfer,which is also an exact solution to the unsteady Navier-Stokes(NS)equations.The boundary layer energy equation is solved with the closed form solutions for prescribed wall temperature and prescribed wall heat flux conditions.The wall temperature and heat flux have power dependence on both time and spatial distance.The solution domain,the velocity distribution,the flow field,and the temperature distribution in the fluids are studied for different controlling parameters.These parameters include the Prandtl number,the mass transfer parameter at the wall,the wall moving parameter,the time power index,and the spatial power index.It is found that two solution branches exist for certain combinations of the controlling parameters for the flow and heat transfer problems.The heat transfer solutions are given by the confluent hypergeometric function of the first kind,which can be simplified into the incomplete gamma functions for special conditions.The wall heat flux and temperature profiles show very complicated variation behaviors.The wall heat flux can have multiple poles under certain given controlling parameters,and the temperature can have significant oscillations with overshoot and negative values in the boundary layers.The relationship between the number of poles in the wall heat flux and the number of zero-crossing points is identified.The difference in the results of the prescribed wall temperature case and the prescribed wall heat flux case is analyzed.Results given in this paper provide a rare closed form analytical solution to the entire unsteady NS equations,which can be used as a benchmark problem for numerical code validation.