Food Safety Detection Methods Applied to National Special Rectification of Product Quality and Food Safety

Afour-month period of national special rectification for product quality and food safety officially started on August 25, and was focused on eight fields, including those of agricultural products and processed foods.……

Exploring the Wenchuan earthquake fault through the accurate location of WFSD-4#Well using seismic reflection

Deep drilling data on seismogenic faults that are obtained directly can help in understanding earthquake mechanisms and the resulting changes in deep structure and material composition.However,geophysical data are necessary to ensure that the planned borehole accurately drills through the target faults.In this study,the deep crustal structure of the Longmenshan fault is explored to obtain seismogenic fault characteristics of the Wenchuan earthquake.A scientific drilling project,Wenchuan Earthquake Fault Scientific Drilling No.4 Borehole(WFSD-4)is proposed with a borehole designed to drill through the north section of the fault zone while penetrating as many geological bodies and target layers related to seismogenic fault slip as possible.High-precision seismic exploration is then carried out to study the deep structure of the fault zone and achieve the scientific objective of the borehole.Two high-precision deep seismic reflection lines were arranged perpendicularly to the fault zone,and data were obtained through special acquisition schemes and processing methods.Finally,the surface position and drilling depth route of WFSD-4 are determined based on the interpretation results of seismic profiles.The seismic reflection method for site selection of the Wenchuan earthquake fault scientific drilling is proven feasible by comparing the interpretation with the actual drilling results,laying the foundation for further study on the deep structures of fault zones.

The Idea and Application of Tuina in the Prevention and Treatment of COVID‑19

While traditional Chinese medicine has displayed a positive and effective role in saving lives of COVID‑19 patients,Tuina,which is an important component in Chinese medicine,has also shown its merits in enhancing the immune function and relieving symptoms in COVID‑19 patients.This article elaborates the long history of Tuina in treating and preventing epidemic diseases and its effect in improving the immune function.It also introduces some special Tuina methods,for instance,sputum drainage by the back‑patting method to enable the discharge of sputum;slant‑scrubbing method applied on the hypochondriac regions to bring the effect of soothing the liver to regulate qi,which may also relieve anxiety of patients with COVID‑19;and spine‑pinching method to enhance human resistance to diseases,which is more suitable for the elderly and for children with mild or common types of COVID‑19 and can also be used for health care and disease prevention among the general population.Tuina methods for children using the common children’s specific Tuina points and manipulations to improve children’s body constitution are also mentioned in the article.Self‑acupoint Tuina for health care,including acupoints for prevention purposes,acupoints for early clinical stage(mild stage)and recovery stage,as well as acupoints for children health care and specific operations,is also illustrated in the article.Moreover,basic exercises for health care,such as eight‑section brocade,Shaolin internal exercises,six‑character formula,and change of tendons,are also presented.In the final analysis,this article is aimed at some ideas and feasible applications of Tuina therapy in the prevention and treatment of COVID‑19,in the hope to provide some worthy experience and introduce methods in preventing and fighting against COVID‑19 to people all over the world.

The Idea and Application of Tuina in the Prevention and Treatment of COVID-19

While traditional Chinese medicine has displayed a positive and effective role in saving lives of COVID-19 patients,Tuina,which is an important component in Chinese medicine,has also shown its merits in enhancing the immune function and relieving symptoms in COVID-19 patients.This article elaborates the long history of Tuina in treating and preventing epidemic diseases and its effect in improving the immune function.It also introduces some special Tuina methods,lor instance,sputum drainage by the back-patting method to enable the discharge of sputum;slant-scrubbing method applied on the hypochondriac regions to bring the effect of soothing the liver to regulate qi,which may also relieve anxiety of patients with COVID-19;and spine-pinching method to enhance human resistance to diseases,which is more suitable for the elderly and for children with mild or common types of COVID-19 and can also be used for health care and disease prevention among the general population.Tuina methods for children using the common childreifs specific Tuina points and manipulations to improve children’s body constitution are also mentioned in the article.Self-acupoint Tuina for health care,including acupoints for prevention purposes,acupoints for early clinical stage(mild stage)and recovery stage,as well as acupoints for children health care and specific operations,is also illustrated in the article.Moreover,basic exercises for health care,such as eight-section brocade,Shaolin internal exercises,six-character formula,and change of tendons,are also presented.In the final analysis,this article is aimed at some ideas and feasible applications of Tuina therapy in the prevention and treatment of COVID-19,in the hope to provide some worthy experience and introduce methods in preventing and fighting against COVID-19 to people all over the world.

NONCONFORMING FINITE ELEMENT PENALTY METHOD FOR STOKES EQUATION

a special penalty method is presented to improve the accuracy of the standard penalty method for solving Stokes equation with nonconforming finite element.It is shown that this method with a larger penalty parameter can achieve the same accuracy as the standard method with a smaller penalty parameter. The convergence rate of the standard method is just half order of this penalty method when using the same penalty parameter, while the extrapolation method proposed by Faik et al can not yield so high accuracy of convergence.At last, we also get the super convergence estimates for total flux. Received October 14, 1996 1991 MR Subject Classification: 65N30.

Editorial for special issue on optical methods for life sciences

Optical methods for life sciences is a very comprehensive subject.Especially in this era,scientific discoveries depend on more and more interdisciplinary cooperation.

Numerical Simulation of Asymmetric Merging Flow in a Rectangular Channel

The steady, asymmetric and two-dimensional flow of viscous, incompressible and Newtonian fluid through a rectangular channel with splitter plate parallel to walls is investigated numerically. Earlier, the position of the splitter plate was taken as a centreline of channel but here it is considered its different positions which cause the asymmetric behaviour of the flow field. The geometric parameter that controls the position of splitter is defined as splitter position parameter a. The plane Poiseuille flow is considered far from upstream and downstream of the splitter. This flow-problem is solved numerically by a numerical scheme comprising a fourth order method, followed by a special finite-method. This numerical scheme transforms the governing equations to system of finite-difference equations, which are solved by point S.O.R. iterative method. In addition, the results obtained are further refined and upgraded by Richardson Extrapolation method. The calculations are carried out for the ranges -1 α R < 105. The results are compared with existing literature regarding the symmetric case (when a = 0) for velocity, vorticity and skin friction distributions. The comparison is very favourable. Moreover, the notable thing is that the decay of vorticity to its downstream value takes place over an increasingly longer scale of x as R increases for symmetric case but it is not so for asymmetric one.