Euler’s First-Order Explicit Method–Peridynamic Differential Operator for Solving Population Balance Equations of the Crystallization Process

Using Euler’s first-order explicit(EE)method and the peridynamic differential operator(PDDO)to discretize the time and internal crystal-size derivatives,respectively,the Euler’s first-order explicit method–peridynamic differential operator(EE–PDDO)was obtained for solving the one-dimensional population balance equation in crystallization.Four different conditions during crystallization were studied:size-independent growth,sizedependent growth in a batch process,nucleation and size-independent growth,and nucleation and size-dependent growth in a continuous process.The high accuracy of the EE–PDDO method was confirmed by comparing it with the numerical results obtained using the second-order upwind and HR-van methods.The method is characterized by non-oscillation and high accuracy,especially in the discontinuous and sharp crystal size distribution.The stability of the EE–PDDO method,choice of weight function in the PDDO method,and optimal time step are also discussed.

GENERALIZED FORELLI-RUDIN TYPE OPERATORS BETWEEN SEVERAL FUNCTION SPACES ON THE UNIT BALL OF C^(N)

In this paper,we investigate sufficient and necessary conditions such that generalized Forelli-Rudin type operators T_(λ,τ,k),S_(λ,τ,k),Q_(λ,τ,k)and R_(λ,τ,k)are bounded between Lebesgue type spaces.In order to prove the main results,we first give some bidirectional estimates for several typical integrals.

Enhancing Operational Efficiency: Exploring the Integration of SOPs Using Virtual Reality and Smart Glasses Technology in Food Manufacturing

This paper explores the integration of Standard Operating Procedures (SOPs) using virtual reality and smart glasses technology in food manufacturing. The study employs a thorough methodology, combining observational insights to develop a comprehensive SOP. Implementation at different firms resulted in significant improvements, reducing product waste and enhancing overall efficiency. The use of virtual reality further augments SOP adoption. The findings underscore SOPs’ transformative influence, offering a tangible solution to challenges in the food production sector. Recommendations include regular SOP reviews and ongoing training for sustained success. Different firms exemplify SOPs as indispensable tools for operational excellence.

从协同到求异:指向教师专业发展的U-S合作优化研究

U-S合作是教师专业发展的重要举措。审视U-S合作的历程可知,U-S合作致力于多方位促进教师专业发展,协同逐渐成为U-S合作促进教师专业发展的底层逻辑。随着合作的持续推进,这一底层逻辑在促进教师专业发展方面所潜在的矛盾也逐渐暴露出来。一方面,大学与中小学的文化差异阻碍了协同的深度发生;另一方面,为了实现大学与中小学的协同,双方不得不做出诸多的妥协,在妥协的语境下,中小学教师往往面临着主体性丧失的风险。与之相对,在求异这一核心理念的引领下,跨界学习旗帜鲜明地提出了“差异即资源”的主张,并通过互动场域的营造和互动系统的建构,为“差异即资源”提供了现实可能,也为优化U-S合作提供了新的思路。

基于PHA-LEC-SCL法高校实验室安全评价体系的研究

随着高校科研项目的增加,人员的流动性增强,安全事故也随之增加。通过对高校实验室安全管理工作的总结与分析,探讨了影响实验室安全的各种因素,运用预先危险性分析法(PHA),对高校实验室的危险有害因素进行识别和定性分析,并将作业条件危险性评价法(LEC)与之相结合,对各子系统进行风险评估,并对其风险程度进行定量计算。采用安全检查表(SCL)对高校实验室进行安全综合评价,建立了安全评价方法之间的内在联系,从而定性定量的判定高校实验室安全等级,以便及时对危险有害因素做出反应,防止事故的发生。

U-G-S模式下现代大学附属学校建设的路径思考

U-G-S(大学-政府-学校)三方联动是上海师范大学近年来建设现代大学附属学校的主要模式,上海师范大学、各区政府与中小学校高效协同合作,发挥各方优势,主动服务上海市政府建设“五个新城”的城市战略,办老百姓家门口的好学校。大学附属学校分为挂牌学校和新建学校两种类型,研究从内在机制、实践路径和建设成效三个方面对两类学校的变革发展进行深度剖析,以期为大学附属学校建设提供宝贵经验。

基于LASSO回归的宁夏回族自治区不同学段儿童青少年近视影响因素分析

目的分析宁夏回族自治区儿童青少年近视流行现状、影响因素及不同学段间的差异。方法采用分层整群随机抽样的方法,于2019年9月至12月,在宁夏回族自治区银川市、吴忠市、石嘴山市、固原市和中卫市,随机抽取8所小学、6所初中、6所高中、4所大学的学生为研究对象,小学每个年级抽取5个班级,初中至大学每个年级抽取4个班级,以抽取班级的全体学生作为研究对象,共抽取学生14211人,对其进行问卷调查、体格检查和视力测量。不同学段儿童近视的影响因素采用最小绝对收缩和选择算子(LASSO)联合Logistic回归进行分析,选择贝叶斯信息准则(Bayesian information criterion,BIC)最小的模型为最优模型。结果宁夏回族自治区儿童青少年近视检出率为70.3%,女生高于男生,城市高于乡镇,差异均有统计学意义(均为P<0.001);按学段分层后,随着年级的增加,近视检出率随之升高,小学最低,大学最高,不同学段近视检出率差异有统计学意义(P<0.001)。近视影响因素的LASSO-Logistic回归分析表明,城乡、性别、年龄、目前是否配戴眼镜、每日课间操节数、是否积极参加体力活动和过去6个月是否保持规律活动是小学生近视的影响因素(均为P<0.05);性别、目前是否配戴眼镜是初中生和高中生近视的影响因素(均为P<0.05);目前是否配戴眼镜是大学生近视的影响因素(P<0.05)。结论宁夏回族自治区儿童青少年近视检出率高,不同学段儿童青少年近视影响因素差异明显。配戴眼镜是控制近视的保护因素。应根据儿童青少年所处学段开展有针对性的视力相关知识的健康教育,增强其健康保健意识,提高儿童青少年视力。

Delorme's operation plus sphincteroplasty for complete rectal prolapse associated with traumatic fecal incontinence

Rectal prolapse associated with traumatic fecal incontinence is a rare clinical combination. This study was designed to assess Delorme＇s operation with sphincteroplasty as a surgical management of this combination in terms of recurrence and improvement of fecal incontinence. In this prospective study, we enrolled patients suffering from short, full-thickness rectal prolapse associated with traumatic fecal incontinence who had been admitted to Alexandria Main University Hospital during the period of May 2010-January 2013. Preoperative data including cause of trauma, duration of symptoms, results of anal manometry, and degree of fecal incontinence using Wexner score were collected from all patients. Delorme＇s procedure with overlap sphincteroplasty was done in all patients. Recurrence of prolapse and improvement of fecal incontinence were assessed after 1, 3, 6 and 12 months. The study included 13 patients aged （32±8.7） years, 9 females and 4 males. Cause of sphincteric injury included previous anal surgery in 7 patients and normal labor in 6 patients. Duration between sphinctefic injury and operation was （8.08±2.47） months. Preoperative Wexner＇s mean score was 16.07±3.4. Early postoperative complications included superficial wound infection （69.2%）, minor wound dehiscence （61.5%）, and postoperative bleeding （7.6%）. Recurrence was detected in 1 patient at 6 month follow-up. Wexner＇s score showed significant improvement for all patients after 6 months （4.00±2.04）. In conclusion, combination of Delorme＇s procedure and sphincteroplasty for treatment of patients with short complete rectal prolapse associated with traumatic fecal incontinence is a safe, effective surgical management with satisfactory results regarding anatomical and functional outcomes.

Optimization Algorithm for Operation Comfortability of Master Manipulator of Minimally Invasive Surgery Robot

To evaluate the operation comfortability in the master-slave robotic minimally invasive surgery(MIS), an optimal function was built with two operation comfortability decided indices, i.e., the center distance and volume contact ratio. Two verifying experiments on Phantom Desktop and Micro Hand S were conducted. Experimental results show that the operation effect at the optimal relative location is better than that at the random location, which means that the optimal function constructed in this paper is effective in optimizing the operation comfortability.

Recording the direct surgeon’s view with an operating microscopic view improves microscopic ophthalmic surgery training

AIM:To establish a recording system with a direct view of the surgeon to supplement video recording under an operating microscope,which lacks information on the movement and position of the surgeon’s hands,and to facilitate the reproduction of a skilled surgeon’s technique by a surgeon in training.METHODS:A small camera was attached to the operating microscope with a custom adapter.Microscopic surgeon’s view and direct surgeon’s view through this new camera were recorded in the surgical recording system.Both movies were synchronized and analyzed how do surgeons handle the instruments.RESULTS:A small camera attached to the operating microscope allowed the surgeon’s hands motion to be recorded without interfering with the surgeon’s movements.Different surgeons used different methods to manipulate the ultrasound handpiece and the irrigation/aspiration device.Even in the simple paracentesis procedure,different surgeons used different methods.Surgeons-in-training were able to identify and improve their weaknesses by watching synchronized movies of their hand motions and microscopic view.CONCLUSION:Simultaneous recording the surgical field out of the operating microscopic view by a small camera set on the microscope is comprehensive and improves surgeons-in-training understanding and learning surgeries.

Inverse Differential Operators in Time and Space

When one function is defined as a differential operation on another function, it’s often desirable to invert the definition, to effectively “undo” the differentiation. A Green’s function approach is often used to accomplish this, but variations on this theme exist, and we examine a few such variations. The mathematical analysis of is sought in the form if such an inverse operator exists, but physics is defined by both mathematical formula and ontological formalism, as I show for an example based on the Dirac equation. Finally, I contrast these “standard” approaches with a novel exact inverse operator for field equations.

国内S Zorb装置运行情况分析

介绍了国内S Zorb装置的分布情况以及其中28套工业装置在2023年的运行情况,通过对比不同S Zorb装置的2023年运行数据发现,不同S Zorb装置原料硫含量和烯烃含量、主要操作参数、辛烷值损失、吸附剂活性虽然存在较大的差别,但所有装置均可稳定生产满足国Ⅵ标准的汽油,说明S Zorb装置具有较好的适应性。汇总了2011年以来中国石化S Zorb装置的运行数据,结果发现,中国石化S Zorb装置的原料硫含量波动较大,烯烃含量呈逐年下降趋势,而装置脱硫率基本不变,烯烃饱和反应及辛烷值损失变化较大。

Verification of an operational ocean circulation-surface wave coupled forecasting system for the China＇s seas

An operational ocean circulation-surface wave coupled forecasting system for the seas off China and adjacent areas（OCFS-C） is developed based on parallelized circulation and wave models. It has been in operation since November 1, 2007. In this paper we comprehensively present the simulation and verification of the system, whose distinguishing feature is that the wave-induced mixing is coupled in the circulation model. In particular, with nested technique the resolution in the China＇s seas has been updated to（1/24）° from the global model with（1/2）°resolution. Besides, daily remote sensing sea surface temperature（SST） data have been assimilated into the model to generate a hot restart field for OCFS-C. Moreover, inter-comparisons between forecasting and independent observational data are performed to evaluate the effectiveness of OCFS-C in upper-ocean quantities predictions, including SST, mixed layer depth（MLD） and subsurface temperature. Except in conventional statistical metrics, non-dimensional skill scores（SS） is also used to evaluate forecast skill. Observations from buoys and Argo profiles are used for lead time and real time validations, which give a large SS value（more than 0.90）. Besides, prediction skill for the seasonal variation of SST is confirmed. Comparisons of subsurface temperatures with Argo profiles data indicate that OCFS-C has low skill in predicting subsurface temperatures between 100 m and 150 m. Nevertheless, inter-comparisons of MLD reveal that the MLD from model is shallower than that from Argo profiles by about 12 m, i.e., OCFS-C is successful and steady in MLD predictions. Validation of 1-d, 2-d and 3-d forecasting SST shows that our operational ocean circulation-surface wave coupled forecasting model has reasonable accuracy in the upper ocean.

基于自适应S面算法的小型ROV艏向和深度运动控制研究

带缆遥控水下机器人(ROV)系统艏向与深度运动具有强非线性和运行环境不确定性等特点。针对ROV的运动特点,构建运动控制模型并进行化简,通过构建自适应S面控制法对艏向与深度进行控制,并利用Lyapunov的稳定性判据证明该控制法的稳定性,通过仿真验证了该控制法具有良好的稳定性和控制品质。同时,与S面控制法相比,自适应S面控制具有更好的动态性能与静态性能,调节速度快、稳定性强,能够准确控制ROV运动。

CLINICAL CONCEPTION OF KELLER'S OPERATION FOR HALLUX VALGUS DEFORMITY——A SURVEY OF 112 CASES

In a long-term follow-up study (average, 6.5 years) of 112 feet (90 pa-tients) subjected to Keller’s operation for hallux valgus deformity, the author observed arelationship between Keller’s operation and the metatarsalgia which was located beneaththe central metatarsal heads. The data showed that the metatarsalgia developed or was ag-gravated in 26 feet (23%), and was eliminated or alleviated in 23 feet (21%) afterKeller’s operation. When more than one-third of the proximal phalanx of the big toe wasresected, the incidence of the metatarsalgia obviously increased following surgery. Theautho rpreferred a "Z" lengthening of the extensor hallucis longus tendon instead ofresecting excessive proximal phalanx. The total incidence of the metatarsalgia was 36%(40 feet) preoperatively and 38% (43 feet) postoperatively. This result indicated thatthere was no obvious difference in the incidence of the preoperative and postoperativemetatarsalgia. No more than one-third of the proximal phalanx of the big toe should beremoved. This seems to reduce the incidence of the metatarsalgia after Keller’s operation.After operation, the three princepal symptoms of hallux valgus deformity, painful bunionand difficulty in shoe-wearing were improved for more than 95% in the 112 feet.Eighty one% of the patients were satisfied with the result of the operation. We considerthat this method is one of the effective operation for correcting the hallux valgusdeformity and it is also important to select suitable patients.

A Comparative Study of the Management Mode of Sino- American Institutions of Higher Learning from the Perspective of the Party-Administrative Power Separation and Operation Mechanism

In this paper, we research on the higher education management mode of China and America based on the perspective of operation mechanism, separation of school and the government. As the thought of higher education management theory or a form, we jump out of the labyrinth of modernism manages view and the introduction of totally different from the modernist paradigm, from the angle of the theory research of postmodernism manages view. The paper is organized as the follows. In the first section, we generally introduce the basic concepts of higher education management and the relationship of the schools and government. Then, by comparing the pattern of the Chinese and the American, we analyze the difference in detail. Finally, we set up the prospect and the conclusion. In conclusion, our method combines the advantages of the American higher education management model which will be meaningful.

基于B/S架构的小学家校信息管理系统设计

文章采用模型-视图-控制器(Model-View-Controller,MvC)的软件设计模型,基于浏览器/服务器(Browser/Server,B/S)架构设计一种小学家校信息管理系统,旨在提高学校家校沟通的效率和质量。采用黑盒测试和白盒测试相结合的方式对所设计的系统进行测试。实验结果表明,该系统能够满足小学家校信息管理的需求,并具有良好的性能和稳定性。

China's Expanding Participation in the UN Peacekeeping Operations

The UN-led peacekeeping operation is a lodestar within the field of current international security.As an important example of her peaceful diplomacy,China has consistently and continuously supported the UN-led peacekeeping operations since 1998 when China joined the UN peacekeeping Operation Special Committee.The Chinese peacekeepers accomplished their UN-authorized missions successfully.With their impressive professionalism,high spirits,combat capabilities,and outstanding achievements,the Chinese peacekeepers have been highly acknowledged by the UN organizations,the host nations and the international media.

First Forum on China Casting Quality Standards & Overview of Revision History of China's National/Industrial Standards for Foundry Operations

Both national and local governments have been paying great attention to the work of industrial standardization with the enormous increase in international trade after China joined WTO. According to the standards revising plan of Standardization Administration Committee of China (SAC),TC54 has already revised a series of national standards and industrial standards for foundry operations,and proposed some new ones. As a result,some old fashioned standards containing low-level techniques have been gradually discontinued or replaced with new versions.……

浅析国家药监局加入药品检查合作计划(PIC/S)中广东药监面临的形势与发展展望

国家药监局加入药品检查合作计划(PIC/S)的进程已经进入正式申请阶段,这将加速推动我国药品监管体系国际化现代化发展。本文简要介绍了PIC/S的相关情况,梳理了国家药监局加入该组织的主要进程以及国内近年来在药品GMP检查体系和相关能力建设方面的工作进展,展望了该形势下广东省药监局联合港澳地区协同推进药品监管能力建设、凝聚自身实践经验、助力国家药品监管和药品产业发展的工作脉络。