NEW SYNTHETIC METHOD OF 4,4'-OXYBIS(BENZOIC ACID)AND ITS APPLICATION IN POLYESTER

4,4'-Oxybis(benzoic acid)(Ⅰ)is an important monomer for making synthetic resin,heat resistant film and liquid crystal fiber,etc.It has been synthesized either by the oxidation of 4,4'-dimethyl diphenyl ether,or by the electrophilic substitution of diphenyl ether,these substituents introduced into the benzene ring can be further transformed into carboxylic groups.Diphenyl ethers are usually prepared from phenols and halobenzenes through Ullmann resction.Due to the high reaction temerature(usually above 200℃),long time heating and the formation of isomers,it is difficult to obtain pure products in high yields.

Research and Application of New Methods to Oil-Gas Geochemical Exploration

Based on the results of researches and applications for many years, it has been discovered that new methods and techniques for geochemical exploration of oil and gas such as δC, altered carbonate, Hg in absorption phase, Ks, Fe2+, δ13C, fluorescence in two and three dimensions, and N2 and O2 in heat release can give full play in the following five fields: (1) optimization of the favourable target or hollow zones and structural zones in a region; (2) evaluation of oil traps and delineation of prospective oil and gas areas; (3) prediction of deep-seated oil-bearing horizons; (4) evaluation of the genesis of oil and gas geochemical anomalies and determination of the types of oil and gas accumulations; (5) forecast of the burial depths of oil and gas pools.

Establishment of a new method of digital orthopedic surgery and its widespread clinical application

Objective To create an unique new method of digital orthopedic surgery and widely apply to spinal surgery,treatment of bone and joint injuries,ligament reconstruction and repair,bone minor resection and reconstruction,serious bone and

New Method for 3D Transient Eddy Current Field Calculation and Its Application in Magneto-Acoustic Tomography

A new method of 3D transient eddy current field calculation is proposed. The Maxwell equations with time component elimination （METCE） are derived under the assumption of magnetic quasi static approximation, especially for the sample of low conductivity. Based on METCE, we deduce a more efficient reconstruction algorithm of a 3D transient eddy current field. The computational burden is greatly reduced through the new algorithm, and the computational efficiency is improved. This new algorithm decompounds the space-time variables into two individual variables. The idea is to solve the spatial vector component firstly, and then multiply it by the corresponded time component. The iterative methods based on METCE are introduced to recover the distribution of conductivity in magneto-acoustic tomography. The reconstructed images of conductivity are consistent with the original distribution, which validate the new method.

Methods of Variations and Their Applications

In this review article, we begin with reviewing Calculus of variations giving few examples on its use to solve a large number of problems in geometry, physics, and other branches of knowledge. Afterwards, we direct our attention to different methods of variations which evolved during the last century and which include their use in eigenvalue problems and in finite difference methods and those adopted in classical and quantum mechanics. The methods used in evaluating products and quotients of functionals are also discussed along with variational iteration methods. Later on, a good number of applications in different areas are presented and discussed;then a concluding discussion is given.

A New Method of Embedded Fourth Order with Four Stages to Study Raster CNN Simulation

A new Runge-Kutta （PK） fourth order with four stages embedded method with error control is presentea m this paper for raster simulation in cellular neural network （CNN） environment. Through versatile algorithm, single layer/raster CNN array is implemented by incorporating the proposed technique. Simulation results have been obtained, and comparison has also been carried out to show the efficiency of the proposed numerical integration algorithm. The analytic expressions for local truncation error and global truncation error are derived. It is seen that the RK-embedded root mean square outperforms the RK-embedded Heronian mean and RK-embedded harmonic mean.

A NEW COPY TECHNIQUE·FOR SPECIMEN GRATING IN MOIRE METHOD

A special X-radiography,used in obtaining the deformed specimen grating in in-plane moire method is introduced.The density of gridline is up to 50 lines / mm.This method is suitable not only for the copy of grating in fiat surface but also for that in curved surface.From unfolding the copy and superposing it with a reference grating,the moire effect arises.By processing this moire fringes with the digital image processing unit, the strain distribution would be obtained.Furthermore,the u-and v-displacement fields could be separated by the optical processing of this copy.The measurment sensitivity and accuracy become better simultaneously because of the fringe multiplication.Thus,this method makes it possible to measure the elastic-plastic strain precisely in any developable curved surfaces,for example, the surface of shaft,rotary-wing,cylindrical shell and cone shell etc.

Research and Development of New Chinese Materia Medica for Treatment of Refractory Hematopathy by Establishment and Application of Multiple Technique Platforms

Research Objective and Overview It is necessary to find effective Chinese materia medica （CMM） for the treatment of refractory hematopathy as commonly used prednisone, androgen and immune suppression agents of tendemonstrate poor efficacy and serious side effects.

TanDEM-X双站SAR干涉测量及研究进展

较全面、系统地介绍了Tan DEM-X/Terra SAR-X双站SAR科学计划,重点涉及其科学目标、Tan DEM-X卫星参数、轨道结构以及干涉数据获取模式等相关内容,并讨论了双站SAR成像、极化In SAR和数字波束成形等干涉测量新技术及其研究进展。这些双站SAR新技术的实现将大大地推动SAR干涉测量在全球地形测绘、冰川学、海洋学及地质学等领域中的应用。

Advance of in-situ stress measurement in China

In-situ stress is an essential parameter for design and construction of most engineering projects that involve excavation in rocks. Progress in in-situ stress measurement from the 1950s in China is briefly introduced. Stress relief by overcoring technique and hydraulic fracturing： technique are the two main techniques for in-situ stress measurement in China at present. To make them suitable for application at great depth and to increase their measuring reliability and accuracy, a series of techniques have been developed. Applications and achievements of in-situ stress measurement in Chinese rock engineering, including mining, geotechnical and hydropower engineering, and earthquake prediction, are introduced. Suggestions for further development of in-situ stress measurement are also proposed.

PERTURBATION SOLUTION TO THE NONLINEAR PROBLEM OF OBLIQUE WATER EXIT OF AN AXISYMMETRIC BODY WITH A LARGE EXIT-ANGLE

In this paper, a nonlinear, unsteady 3-D free surface problem of the oblique water exit of an axisymmetric body with a large water exit-angle was investigated by means of the perturbation method in which the complementary angle a of the water exit angle was chosen as a small parameter. The original 3-D problem was solved by expanding it into a power series of a and reduced to a number of 2-D problems. The integral expressions for the first three order solutions were given in terms of the complete elliptic functions of the first and second kinds. The zeroth-order solution didn't turn out to be a linear problem as usual but a nonlinear one corresponding to the vertical water exit for the same body. Computational results were presented for the free surface shapes and the forces exerted up to the second order during the oblique water exit of a series of ellipsoids with various ratios of length to diameter at different Froude numbers.

STRAIN PATH THEORY OF PLASTIC CONSTITUTIVE RELATION

Based on Illiushin's two hypotheses, a new plastic constitutive equation of integral type is proposed. The deviatoric stress induced by a strain path consists of two parts which vary according to different laws. Comparison of theoretical calculation with recent experiments is satisfactory. The present theory is not an endochronic theory.

面向新型电力系统的时序生产模拟应用与求解技术综述

在建设新型电力系统背景下,时序生产模拟技术依托电网数字化转型赋能,成为了新型电力系统运行评估与规划决策的重要工具。文中总结了国内外对于时序生产模拟相关问题的研究成果,以及时序生产模拟在新型电力系统中的应用与求解技术。首先,介绍了时序生产模拟的结构及特点,从电力电量平衡测算、“双碳”措施量化分析、未来电网形态与演化路径等方面综述了时序生产模拟的应用场景。然后,根据现有时序生产模拟求解技术特点将其分类介绍,并讨论了不同求解技术的局限性。最后,对新型电力系统时序生产模拟研究进行了展望。

传统剪纸文化与现代生活时尚的结合

通过深入挖掘剪纸文化的艺术价值和工艺手法,结合现代潮流理念,运用文化创意与现代技术的结合,实现传统剪纸文化与现代生活时尚的融合,同时也为现代设计提供一种全新的创作思路,为传统剪纸文化的传承和发展探索出前进方向。

基于数据挖掘技术探讨灸法治疗不孕症的临床应用规律

目的利用数据挖掘技术探讨灸法治疗不孕症的临床应用规律,为临床灸法治疗不孕症提供诊疗依据。方法计算机检索中文期刊全文数据库(CNKI)、万方数据库(WANFANG)、维普数据库(VIP)、中国生物医学文献数据库(CBM)、PubMed中2010年1月1日—2022年1月1日关于灸法治疗不孕症的相关文献,根据排除纳入标准筛选文献并提取其中灸法种类、灸量、治疗方法、主要证型、腧穴频次、腧穴所在部位及归经等信息,利用Excel2019、SPSS24.0、SPSS Modeler18.0对数据进行数据统计分析、聚类分析、关联规则分析以及复杂网络分析。结果文献检索与筛选共获取文献101篇。文献数据提取并数理统计分析后获得腧穴49个,总频次为374,其中关元穴频次最高。腧穴涉及十二经脉以及任脉和督脉,特定穴中交会穴腧穴数最高,胸腹部穴位最多。灸法方面,治疗方法种类较多,其中灸法与中药结合为主;灸法种类分为9类,其中以温和灸为主;治疗时间多以20~30min或2~5壮艾炷为主;治疗频率多为1次/d。聚类分析获取4组腧穴聚类,关联规则分析获取8个关联组,复杂网络分析获取腧穴复杂网络图。结论灸法治疗不孕症以温和灸、热敏灸为主,并注重施灸的灸量与频次,常用的治疗方法为灸法与中药组合,常用的施治腧穴为关元穴、神阙穴、子宫穴、三阴交穴和气海穴,其结果可以为灸法治疗不孕症临床应用提供参考依据。

“三软地层”超前探放水综合控制技术

“三软地层”探放水钻孔孔口管固管安装困难、顶板遇水塌陷渗水、疏放水钻孔坍塌堵孔以及钻孔缩颈的施工技术一直难以解决。通过理论计算与工程实践,摸索了一套探放水创新施工工艺,进行了优化钻孔参数设计,11701工作面大部分顶板疏放水钻孔垂高取200 m,终孔孔距不大于60 m,富水区域进行加密。技术上攻克了套管加长后固结难的技术难题,研发出一套“分级注浆固管法”,将整个套管牢固安装在设计位置,实现了在软岩区域快速固结安装超长孔口套管的新工法。针对“三软地层”的钻孔探放水,为了解决“三软地层”的探放水钻孔在成孔后坍塌堵塞的技术难题,创造性的研发出三级注浆以及“全孔花管护壁新工艺”;工程实践证明该套技术方案很好地解决了“三软地层”探放水钻孔施工难题。

新形势下当前地质矿产勘查及找矿技术的分析

随着我国矿业不断发展,使得地质矿产勘查及找矿技术作用日益凸显。尤其是现代社会经济飞速发展,人们生产生活对矿产资源的需求日益增加,必须加大力度提高地质矿产勘查及找矿技术水平,在提高经济效果的同时,进一步推动我国矿业持续性发展。对此,本文从现阶段地质矿产勘查及找矿技术现状出发,明确提出地质勘查基本原则及找矿技术应用要点,而后具体分析了先进找矿技术的实践应用,在此基础上,就我国现阶段地质矿产勘查及找矿技术存在的问题进行了剖析,并提出针对我国地质矿产勘查及找矿技术水平提升的有效建议。以期进一步提高地质矿产勘查及找矿技术水平,推动我国矿业良性发展。

基于用户需求驱动的新中式座椅设计研究

为提高新中式座椅设计决策的用户感知,从用户需求角度出发进行设计,实现新中式座椅设计的创新研究以及发展。首先,通过前期调研得出原始用户需求,基于Kano模型对于用户需求进行属性划分;然后,运用AHP确定目标用户不同需求权重值,确定相对重要的用户需求;再运用AD理论的公理化设计实现功能域与设计域之间的映射,完成用户需求到设计参数的转化;最后,得出新中式座椅三维建模概念设计,并采取FCE理论进行设计评估。该方法有助于新中式座椅设计决策满足用户需求,在设计实践中具有可行性,对于未来同类家具产品开发具有参考意义。

新媒体视域下非遗推广的路径探索——以香云纱染整技艺为例

文章以广东佛山非遗香云纱染整技艺为例,基于对香云纱发展现状和面临困境的分析,结合新媒体技术的发展特点与自有优势,探索如何将新媒体技术更有效的运用在非遗的推广上,打破非遗推广传播难的困境,从而实现文化的传承和创新,增强文化自信,让全世界人民共享非物质文化遗产带来的文化盛宴。

基于加权逼近理想解排序法建立儿童注射用伏立康唑的药物利用评价细则

目的:建立基于加权逼近理想解排序(TOPSIS)法的儿童注射用伏立康唑药物利用评价(DUE)细则,促进临床合理用药。方法:以注射用伏立康唑药品说明书、儿童侵袭性肺部真菌感染诊治专家共识、抗菌药物临床应用指导原则和相关指南为依据,建立基于TOPSIS法的儿童注射用伏立康唑的DUE细则,依据建立DUE细则回顾性评价我院2019年1月至2022年6月伏立康唑使用情况。结果:208份评价病历加权TOPSIS法评价显示,与最优方案最高接近度为88.92%,最低接近度为35.27%;相对接近度<60%的21例(10.10%),相对接近度60%~<70%的22例(10.58%),相对接近度70%~<80%的148例(71.15%),相对接近度80%~<90%的17例(8.17%),没有相对接近度≥90%的病历。结论:基于加权TOPSIS法的儿童注射用伏立康DUE细则可以用于伏立康唑在儿童的用药合理性评价,评价结果显示我院注射用伏立康唑临床应用中基本合理,仍需进一步加强管控。