HARDY-LITTLEWOOD-POLYA INEQUALITY FOR A LINEAR DIFFERENTIAL OPERATOR AND SOME RELATED OPTIMAL PROBLEMS

In this paper a generalized version of the classical Hardy-Littlewood-Polya inequality is given.Furthermore,the Stechkin's problem for a linear differential operator is solved in L_2(R), and the optimal recovery problem for such differential operator is considered.

Problems Related to Divers Health and Comfort in Hyperbaric He-O_2 Environment

The Diver Gas Recovery System(DGRS)is an important accessory equipment of the 300m Saturation Dive System. The system facilitates the recycling of the breathing gases for divers,therefore,it has great economic benefits. In April 1995, a 300 m unmanned test and a 100 m manned test on the HY2031 DGRSwere carried out successively.Ten months later,another manned test on the HY2032 DGRS

KEY S&T PROBLEMS RELATED TO THE THREE GORGES PROJECT

This article gives a highly capsulized introduction to the research on key S&T problems involving geology, silting-up, hydropower facilities, navigation locks and shiplift, construction technology, and eco-environ-mental con-sequences in the Three Gorges Project on the Yangtze River.

同伴侵害对青少年内外化问题的影响:有调节的中介模型

基于自我决定理论与控制点理论,考察关系需要受挫在同伴侵害与青少年内外化问题之间的中介作用及控制点的调节作用。采用多信息来源的问卷调查法测量青少年的同伴侵害、关系需要受挫、控制点以及内外化问题。结果表明:(1)同伴侵害对内化问题、外化问题均具有显著的正向预测作用;(2)关系需要受挫在同伴侵害与内外化问题的关系中起部分中介作用;(3)控制点调节同伴侵害与关系需要受挫、内化问题的关系,同时关系需要受挫在同伴侵害与内外化问题关系中的中介作用也会受到控制点的调节。研究结果揭示了同伴侵害影响青少年内外化问题的心理机制,为减少青少年内外化问题,促进其心理健康发展提供了有益建议。

Knowledge Attitude and Practice towards Antenatal Care among Pregnant Women Attending for Antenatal Care in SOS Hospital at Hiliwa District, Benadir Region, Somalia

Background: Antenatal care is one of the strategies aimed at addressing maternal mortality as it facilitates the identification and avoid pregnancy related problems and save lives of mothers and babies. Purpose: This study aimed knowledge attitude and practice towards antenatal care among pregnant women attending for antenatal care in SOS Hospital, Hiliwa District, Benadir region, Somalia during the period of the study from April 2021-July 2021. Methodology: The study was descriptive cross-sectional, retrospective hospital based;a total of 60 of pregnant women were enrolled in this study. Data were collected through interview method using structured questionnaire. Data analysis was used Statistical Package for Social Science version 20 for analysis (SPSS). Results: The study discovered a total of 60 respondents have participated of which 45 (75%) had knowledge towards antenatal care, while the study found that the sources of antenatal care information was;23 (38%) from health care providers at health centers and 10 (17%) from husbands. Among the study respondents 48 (80%) have convenience and accepted the utilization of antenatal care and a total of 51 (85%) were seeking permission for antenatal care visit. Also study respondents about 35 (58%) utilized antenatal care visit during their previous pregnancies and 25 (42%) did not. About 22 (36%) were preferred mother and child health centers, 10 (16%) were preferred public hospitals and few proportion 2 (5%) were preferred private hospital for antenatal care visit respectively. Finally the study showed that, multigravida, gestational months, seeking permission and spouse accompany to the antenatal care visit and level of awareness significantly contributed to the utilization of ANC by pregnant women in this study. Significant difference was strongly observed (P = 0.000). Conclusion and Recommendations: In conclusion, there was good knowledge and positive attitude towards ANC despite poor antenatal care utilization, the study recommended;the federal ministry of health incorporation with federal member states ministry of health should intensify national health education programmers aimed at promoting utilization of antenatal care services by increase the knowledge of mothers about importance of antenatal care and timely antenatal care booking and continue provide capacity building for health care providers across the country on national antenatal care ANC guidelines and policies.

Representation of Specific Diagnosis for Low Back Pain Using the 11^(th) Revision of International Classification of Diseases and Related Health Problems: Perspectives of Conventional Medicine and Traditional Medicine

Background:The 11th revision of the International Classification of Diseases and Related Health Problems(ICD-11)was released on June 18,2018,by the World Health Organization and will come into effect on January 1,2022.Apart from the chapters on the classification of diseases in the conventional medicine(CM),a new chapter,traditional medicine(TM)conditions–Module 1,was added.Low back pain(LBP)is one of the common reasons for the physician visits.The classification codes for LBP in the ICD-11 are vital to documenting accurate clinical diagnoses.Methods:The qualitative case study method was adopted.The secondary use data for 100 patients were randomly selected using the ICD-11 online interface to find the classification codes for both the CM section and the TM Conditions–Module 1(TM1)section for LBP diagnosis.Results:Of the 27 codes obtained from the CM section,six codes were not relevant to LBP,whereas the other 21 codes represented diagnoses of LBP and its related diseases or syndromes.In the TM1 section,six codes for different patterns and disorders represented the diagnoses for LBP from the TM perspective.Conclusion:This study indicates that specific diagnoses of LBP can be represented by the combination of CM classification codes and TM1 classification codes in the ICD-11;the CM codes represent specific and accurate clinical diagnoses for LBP,whereas the TM1 codes add more accuracy to the diagnoses of different patterns from the TM perspective.

Optimal paths planning in dynamic transportation networks with random link travel times

A theoretical study was conducted on finding optimal paths in transportation networks where link travel times were stochastic and time-dependent(STD). The methodology of relative robust optimization was applied as measures for comparing time-varying, random path travel times for a priori optimization. In accordance with the situation in real world, a stochastic consistent condition was provided for the STD networks and under this condition, a mathematical proof was given that the STD robust optimal path problem can be simplified into a minimum problem in specific time-dependent networks. A label setting algorithm was designed and tested to find travelers' robust optimal path in a sampled STD network with computation complexity of O(n2+n·m). The validity of the robust approach and the designed algorithm were confirmed in the computational tests. Compared with conventional probability approach, the proposed approach is simple and efficient, and also has a good application prospect in navigation system.

Generalized δ-entropy condition to Riemann solution for Chaplygin gas in traffic flow

The Riemann problem for the Aw-Rascle model in the traffic flow with the Delta initial data for the Chaplygin gas is studied. The solutions are constructed globally under the generalized Rankine-Hugoniot relations, the δ-entropy conditions, and the generalized δ-entropy conditions. A new Delta wave, which is called a primary Delta wave, is defined in some solutions. The primary Delta wave satisfies the generalized Rankine- Hugoniot relations and the generalized δ-entropy conditions. It generates initially from the Delta initial data, which either evaluates a Delta wave, whose weight becomes stronger and stronger, or disappears at a finite time.

Reconfiguration of Spacecraft Cluster Based on Distributed Local Information

The reconstruction of spacecraft cluster based on local information and distributed strategy is investigated.Each spacecraft is an intelligent individual that can detect information within a limited range and can determine its behavior based on surrounding information.The objective of the cluster is to achieve the formation reconstruction with minimum fuel consumption.Based on the principle of dual pulse rendezvous maneuver,three target selection strategies are designed for collision avoidance.Strategy-1 determines the target point’s attribution according to the target’s distance when the target point conflicts and uses a unit pulse to avoid a collision.Strategy-2 changes the collision avoidance behavior.When two spacecraft meet more than once,the strategy switches the target points of the two spacecraft.In Strategy-3,the spacecraft closer to the target has higher priority in target allocation.Strategy-3 also switches the target points when two spacecraft encounter more than once.The three strategies for a given position,different completion times,and random position are compared.Numerical simulations show that all three strategies can accomplish the spacecraft cluster's reconfiguration under the specified requirements.Strategy-3 is better than Strategy-1 in all simulation cases in the sense of less fuel consumption with different completion times and given location,and it is more effective than Strategy-2 in most of the completion time.With a random initial position and given time,Strategy-3 is better than Strategy-1 in about 70%of the cases and more stable.

Dirichlet problem related to a class of superprocesses

ASSUME that ξ = （ξt, Ⅱx） is a right Markov process in Rd. Let φ（x, z） = a（x）z+b（x）z2+integral from n=0 to ∞ (e-uz-1+uz)nx（du）, x∈ Rd, z∈R+. （1）Consider the following Dirichlet problem:

Existence of Solutions of Generalized Quasi-Variational Relation Problems by the Inductive Relations and Some Applications

By the inductive relations,this paper first obtains some existence theorems of solutions for generalized quasi-variational relation problems,which are different from other papers.As applications,some existence theorems of solutions for generalized quasi-equilibrium problems and NS-equilibria for noncooperative games under uncertainty are obtained.

非洲大湖地区地缘关系与族群问题的关联性研究

在非洲国家间的地缘关系中,通常存在两个行为主体,即国家行为体和族群行为体。非洲地缘关系的发展演变,既有国家地缘战略的影响,又离不开族群问题的作用。非洲国家的地缘政治博弈,常常以族群问题作为干预手段,族际冲突也因此越演越烈。族群问题的恶性发展,会反作用于地缘关系,令地缘关系与族群问题呈现出双向互构的态势。以非洲大湖地区为研究案例,将大湖地区的地缘关系变动情况分为三个时间段,从历史的维度对非洲地缘关系与族群问题的关联性和互动机制进行分析。本文认为,在大湖地区的稳定期、冲突期和重建期,地缘关系格局、地缘政治博弈、地缘战略和地缘经济分别对族群问题起到了关键性作用;而族群问题的发展,也在一定程度上重塑了大湖地区国家的地缘战略和地缘关系。