Genetic types and distinguished characteristics of dolomite and the origin of dolomite reservoirs

To find out the origin of dolomite, the precipitation of primary dolomite, and the formation of pores in dolomite, petrologic and geochemical characteristics of typical samples from Sichuan and Tarim Basin were analyzed based on the previous understandings, and three aspects of results were achieved.(1) A classification of dolomite origins based on petrologic features, forming environment, and time sequence was proposed, which shows clear boundaries of diagenetic and characteristic realms and evolved clues between different types of dolomite.(2) Petrographic and geochemical identification marks for different types of dolomite were presented, revealing that the orderly geochemical variation of different types of dolomite is the response to the change of forming environment of dolomite during continuous time sequence.(3) The contribution of dolomitization to the formation of porosity was re-evaluated, revealing that the porosity in dolomite was mostly attributed to the primary pores and supergene dissolution and burial dissolution, and early dolomitization was conducive to the preservation of primary pores. These understandings are of great theoretical significance for identifying the origins and types of dolomite, and can guide the prediction of dolomite reservoirs.

The Distinguished Features of Longman Dictionary of Contemporary English (edition 3)

Longman Dictionary of Contemporary English is one of the commonly-used dictionaries for English learners,in order to help English learners learn more about the Longman Dictionary and make use of it better,the main common features of the Longman Dictionary of Contemporary English group are summarized in this essay and based on that,the distinguished features and the deficiencies of the Longman Dictionary of Contemporary English(edition 3) are analyzed.

WANG DIANZUO—DISTINGUISHED EXPERT OF MINERAL PROCESSING

Mr. Vang Dianzuo was born in 1934, He entered Central-South Inst-

Wang Tao, a distinguished scholar in medical classic systematization

Wang Tao (circa 690-756) was from today's Mei County,Shaanxi Province in the Tang Dynasty,and born into an official family.His father,grandfather and brothers served the imperial government for many years and he himself was put in charge of the imperial library for about 20 years.He compiled the Arcane Essentials from the Imperial Library (Wài Tái Mì Yào),a well-known miscellaneous medical masterpiece,which has been honored with a 'treasure handed down from ancient times'.

Demonstration of the Distinguished Teacher Studio Leads the Exploration and Practice of Teachers’Teaching Innovation Team

The work of the distinguished teacher studio is based on activities and has the characteristics of learning,demonstration,and academic.The“double-qualified”distinguished teacher studio is an important way to help the development of vocational education teachers and cultivate outstanding“double-qualified”teachers.It is also an important carrier to improve teachers’teaching,practice,and scientific research ability,to promote the“three education reform”of vocational education,and to train high-quality technical personnel.

CAS researcher Receives Distinguished Service Award from American Fisheries Society

CHEN Yushun,an expert on aquaculture and aquatic ecosystems from the Institute of Hydrobiology,Chinese Academy of Sciences,received the Distinguished Service Award on August 23,2017 at the American Fisheries Society(AFS)Annual Meeting in Tampa,Florida.The Distinguished Service Award recognizes outstanding contributions of time and energy for

Distinguished Representation of Criteria Based on Trapezoidal Fuzzy Numbers and Fuzzy Memberships in Selection of Contractors

More attention has been drawn to the selection of contractors in recent years,but little research has been conducted on distinguishing representation of performance values for qualitative and quantitative criteria in one decision-making(DM) problem yet.Thus a novel method based on fuzzy number is proposed to solve the representation issue,in which linguistic terms and fuzzy memberships are used to separately describe qualitative and quantitative criteria,and then the linguistic terms are translated into fuzzy numbers which will be defuzzified and unified with fuzzy memberships.The novel method is used to develop a synthetic decision model for selection of contractors.The model is developed to verify the feasibility of the novel method,which(1) builds a twolevel criteria system based on survey and literature summary;(2)utilizes the analytic network process(ANP) to determine criteria weights;(3) uses the novel method to make different representations of performance values for qualitative and quantitative criteria in one DM problem and then unifies different representations for decision matrices;(4) utilizes three multi-criteria decision-making(MCDM) methods containing simple additive weighting(SAW),technique for order preference by similarity to ideal solution(TOPSIS) and complex proportional assessment(COPRAS) to deal with decision matrices.Besides,a case of contractor selection is given to check the novel method by applying developed model,and the case results show that the novel method can suitably solve the representation issue of the performance values for two types of criteria as well as simplify the processes of TOPSIS and COPRAS.

Multi-policy threshold signature with distinguished signing authorities

Threshold signature plays an important role to distribute the power of a single authority in modem electronic society. In order to add functions and improve efficiency of threshold signatures, a multi-policy threshold signature scheme with distinguished signing authorities is proposed. In the scheme two groups can sign and verify each other, so the scheme is two-way signing and verifying. Moreover, the threshold values of the two groups can change with the security classification of the signing document, every discretionary signatory only signs a small part of the document instead of the whole one, so the bandwidth of data transmission for group signature construction can be reduced and the size of group signature is equivalent to that of any individual signature.

Au-chin Tang——A prestigious scientist,outstanding educator and distinguished leader

Au-chin Tang (1915-2008), member of the Chinese Academy of Sciences (CAS), was born in Yixing, Jiangsu Province on November 18th, 1915. During his lifetime, he held various positions such as president

Distinguished Connections on Finsler Algebroids

Considering the prolongation of a Lie algebroid,the authors introduce Finsler algebroids and present important geometric objects on these spaces.Important endomorphisms like conservative and Barthel,Cartan tensor and some distinguished connections like Berwald,Cartan,Chern-Rund and Hashiguchi are introduced and studied.

Professor Yongjia Duan: a distinguished plant pathologist and agricultural educator

Professor Yongjia Duan(段永嘉)is a distinguished plant pathologist and agricultural educator in China He has devoted his entire life in developing and sharing his knowl?edge and experiences in Plant Pathology.Prof.Duan was born in 1910 in Siping,Jilin Province.In 1931,he went to Hokkaido University in Japan to study plant pathology,where he obtained his bachelors degree.In Japan,he met Ms.Hiroko Omura,a primary school teacher(Fig.1).They fell in love and got married.In 1937,Prof.Duan and his wife went back to China,hoping that he could contribute to the development of scienee and technology in China.

Finite-time circulation changes from topological rearrangement of distinguished curves and non-advective fluxes

A vorticity budget diagnoses the growth or decay of a vortex from advective transport,or non-advective fluxes such as those due to friction or vortex tilting.However,when a budget calculation is performed with respect to a fixed coordinate,errors may result from time-dependence of the flow,leading to disagreement between the vorticity tendency and the observed vorticity field.An adaptive Lagrangian coordinate resolves this problem,provided that the resulting Lagrangian structure does not become too complicated.In this study,a numerical simulation of Hurricane Nate(2011),the vorticity tendency is evaluated along distinguished material curves.There can be no net advective flux along a closed material curve,therefore,the total circulation tendency for a material region includes only the non-advective uxes acting along its boundary.A distinguished set of material curves(DMCs)associated with a distinguished hyperbolic trajectory(DHT)form a Lagrangian topology similar to that of a cat’s eye flow or"pouch"at each Eulerian snapshot.The time-dependence of velocities allows additional regions called lobes,which are formed by the intersections of DMCs,to exchange fluid across the vortex boundary by redefining the boundary.Because the vortex boundary changes,we refer to this redefinition of material boundary as"topological rearrangement".The method is useful for unsteady cat’s-eye flows and more complex interactions of multiple waves,vortices and background shear.All advective changes of the vortex circulation are identified by exchanges of the lobes,and all non-advective uxes act between the vortex and either the lobes or environmental flow.The Lagrangian topology and combination of advective and non-advective uxes relative to the topology is used to describe the evolution of the circulation of Nate during its time of formation.

Dear Distinguished Professors and Colleagues,

Have you ever known and understood our academic research? Do you care to read magazines like ours? Are you really interested in cultures and customs and national minorities research in minorities areas in N. W. China? Our institute is just the unit specializing in the research on the cultures and the humanities in the minorities areas in N. W. China. We also have in our institute the M. A. Centre granted and recognized by China’s State Council, where postgraduates can work for M.A.in ethnology, folklore, Mongology, Turkic studies, etc. In addition to conducting the field research, subject study, we also offer the service of videoing the customs of national minorities,collecting and storing their relics, translating the academic essays in foreign languages, etc.

Announcement of Distinguished GPB Articles 2003–2011

The Open Access journal Genomics, Proteomics and Bioinformatics （GPB） would like to announce the award program for distinguished articles published in GPB.

Distinguished African-American Artists of the Past 150 Years

African-American artists have sought recognition of their various artistic endeavors for nearly 400 years in the New World.Slavery was a dehumanizing act that will always reside sadly in our personal history.The African slave trade played a large role in how society views AfricanAmericans artists and their art today.But,along with an early negative perception,we can see how the African Diaspora positively affected American art today.At first,these early artisans were exposed to European art forms,and they adapted these art forms to their own artworks.However,experimentation would eventually lead these artisans,artists,and crafts people to infuse their art forms with a mixture of West African,European,and American cultural ideas.

The first mitogenome of Lauraceae(Cinnamomum chekiangense)

There are three distinct genetic systems in higher plants,the dominant nuclear genome and the semi-autonomous organelle genomes(plastids and mitochondria).In contrast to the conserved plastid genome(plastome),the plant mitochondrial genome(mitogenome)is characterized by an intriguing“evolutionary paradox”distinguished by a remarkably low mutation rate but with a significantly high rearrangement rate(Palmer and Herbon,1988;Lai et al.,2022).

Morphological comparison and molecular marker screening of three Skeletonema species found in Changjiang(Yangtze)River Basin

In our recent investigations of diatom diversity,we studied three species,namely,Skeletonema costatum,Skeletonema subsalsum,and Skeletonema potamos.Although they have been found frequently in Changjiang(Yangtze)River Basin,their morphological and molecular identification is difficult in taxonomy.Therefore,to integrate morphological and molecular biological approaches,we compared systematically their morphological characters and performed phylogenetic analysis.Twelve strains of Skeletonema were collected and isolated from Shanghai and Jiangsu,China,and their morphological characteristics were examined by light microscopy(LM)and the scanning electron microscopy(SEM).Based on morphological comparison,we determined that S.potamos is easy to distinguish from the other two species.The heavily silicified areolae,undulated or cleft distal ends of terminal fultoportula processes(TFPPs),absence of basal pores of fultoportula processes(FPPs),the rootlike protrusions of FPPs,and no interlocking connection are the stable characteristics that can be used to identify S.potamos.However,there are only two features that can distinguish S.costatum from S.subsalsum,namely the location of terminal rimoportulae(TRPs)and the distal shape of TFPPs.In addition,we amplified and sequenced nine common genetic markers from the strains,from which 101 sequences were obtained,constructed phylogenetic trees based on the nine genes and evaluated that seven genes can be used to identify S.potamos,and revealed that S.subsalsum is the closest known relative of S.costatum,and only ATP synthetase beta-subunit gene(atp B)is able to distinguish them from each other,which strongly support that it is an effective molecular marker for Skeletonema.This work provided a theoretical basis for the taxonomic study of Skeletonema.