The equilibrium range of wind wave frequency spectrum

-Theoretical form of equilibrium range is given on the basis of the wind wave frequency spectra proposed by Wenel al. (1988a,b,c, 1989a,b). The effects of peakness factor and water depth are discussed. In the case of deep water the e-quilibrium range is reduced to the form first proposed by Toba (1973) and the coefficient of the formula is shown to be the function of nondimensional fetch or peak frequency. Results of the present paper have been verified through field data.

The Equilibrium Range of Wind Wave Spectra: an Explanation Based on White Noise

Laboratory experiments and field observations show that the equilibrium range of wind wave spectra presents a – 4 power law when it is scaled properly. This feature has been attributed to energy balance in spectral space by many researchers. In this paper we point out that white noise on an oscillation system can also lead to a similar inverse power law in the corresponding displacement spectrum, implying that the – 4 power law for the equilibrium range of wind wave spectra may probably only reflect the randomicity of the wind waves rather than any other dynamical processes in physical space. This explanation may shed light on the mechanism of other physical processes with spectra also showing an inverse power law, such as isotropic turbulence, internal waves, etc.

The influence of head-neck and implant position on the range of motion after total hip arthroplasty

To study the influence of head-neck ratio and implant position on the range of motion (ROM) after total hip arthroplasty (THA).Methods In this study the author established a three-dimensional computerized model of hip joint and tested the range of motion of three different head-neck ratio after total hip arthroplasty.Results Range of motion after total hip arthroplasty depended on design parameters such as head-neck ratio,but also on the implantation parameters such as the cup’s inclination and antevertion,the stem’s antevertion and their combination of each other.Optimal range of motion required compliant position of total hip components.The range of motion increased with the enlarging of head-hnck ratio.Conclusion Higher head-neck ratio leads to optimal range of motion and decreased the prevalence of prosthetic impingement within compliant,well-defined combination of cup’s inclination,cup’s antevertion and stem’s antevertion depending on the intended ROM.Domestic magnesium-silicon jade total hip prosthesis has too low head-neck ratio to result in enough range of motion that fulfilled daily living after total hip arthroplasty.14 refs,4 figs,3 tabs.

Extensive adhesion formation in a total knee replacement in the setting of a gastrointestinal stromal tumor:A case report

BACKGROUND Gastrointestinal stromal tumors(GISTs)are rare primary neoplasms of the gastrointestinal tract,accounting for 1%to 2%of all gastrointestinal neoplasms worldwide.GISTs are frequently discovered incidentally during workup for other diagnosis or intestinal obstruction,as they can present with few or no symptoms.Simultaneously,GISTs confer a high degree of malignant transformation,with a progression in about 10%to 30%of cases.CASE SUMMARY A 63-year-old healthy female presented to our institution with complaints of right knee pain and limited passive and active motion in the setting of a previous right total knee arthroplasty(TKA).One year after TKA,the patient was incidentally diagnosed with a GIST,which was successfully removed.After removal,the patient continued to have limited range of motion of the right knee and subsequently underwent revision TKA.Intraoperatively significant fibrotic adhesions were found encapsulating the femoral and tibial components.The patient’s pain improved postoperatively,however,she continued to have decreased range of motion with difficulty ambulating.CONCLUSION We propose that this case may demonstrate a proinflammatory milieu arising from a GIST,which had a direct influence on the outcome of recent total knee arthroplasty.This proposed mechanism between neoplastic cytokinetic activity and adhesion formation could have implications on preoperative and postoperative orthopedic management of total knee arthroplasty.

STRONG CONVERGENCE THEOREMS FOR EQUILIBRIUM PROBLEM AND BREGMAN TOTALLY QUASI-ASYMPTOTICALLY NONEXPANSIVE MAPPING IN BANACH SPACES

In this paper, we propose a new hybrid iterative scheme for finding a common solution of an equilibrium problem and fixed point of Bregman totally quasi-asymptotically nonexpansive mapping in reflexive Banach spaces. Moreover, we prove some strong convergence theorems under suitable control conditions. Finally, the application to zero point problem of maximal monotone operators is given by the result.

Impacts of Total Energy Consumption Control and Energy Quota Allocation on China′s Regional Economy Based on A 30-region Computable General Equilibrium Analysis

This paper examined the impacts of the total energy consumption control policy and energy quota allocation plans on China′s regional economy. This research analyzed the influences of different energy quota allocation plans with various weights of equity and efficiency, using a dynamic computable general equilibrium(CGE) model for 30 province-level administrative regions. The results show that the efficiency-first allocation plan costs the least but widens regional income gap, whereas the outcomes of equity-first allocation plan and intensity target-based allocation plan are similar and are both opposite to the efficiency-first allocation plan′ outcome. The plan featuring a balance between efficiency and equity is more feasible, which can bring regional economic losses evenly and prevent massive interregional migration of energy-related industries. Furthermore, the effects of possible induced energy technology improvements in different energy quota allocation plans were studied. Induced energy technology improvements can add more feasibility to all allocation plans under the total energy consumption control policy. In the long term, if the policy of the total energy consumption control continues and more market-based tools are implemented to allocate energy quotas, the positive consequences of induced energy technology improvements will become much more obvious.

Intact, pie-crusting and repairing the posterior cruciate ligament in posterior cruciate ligament-retaining total knee arthroplasty: A 5-year follow-up

BACKGROUND The posterior cruciate ligament(PCL) is important for cruciate-retaining(CR)total knee arthroplasty(TKA). Whether the entire PCL should be retained during CR-TKA is controversial.AIM To evaluate the clinical outcomes of PCL preservation in CR-TKA and the methods used to deal with the PCL during surgery.METHODS A retrospective review of patients with osteoarthritis undergoing primary CRTKA(176 patients, 205 knees) in our institution between March 2012 and March 2014 was performed. A PCL protector was used to preserve the intact PCL bone block. The status of the PCL was recorded during surgery. Intact PCL preserved,pie-crusting and repairing were used to balance the tension of the PCL. Range of motion(ROM) and the Knee Society Clinical Rating system(KSS) were evaluated preoperatively and at the endpoint of follow-up.RESULTS The mean ROM of the knee was 103.2 ± 17.2°, KSS clinical score was 47.6 ± 9.5 and KSS functional score was 46.3 ± 11.9 before surgery. The mean ROM of the knee was 117.5 ± 9.7°, KSS clinical score was 89.2 ± 3.6 and KSS functional score was 84.6 ± 9.8 at 5 years follow-up. ROM, KSS clinical scores and KSS functional scores were significantly improved after surgery(P < 0.01). Thirty-two(23.7%)TKAs involved PCL pie-crusting and 18(13.3%) involved PCL repair. Eighty-five(63.0%) TKAs applied standard operating procedures and preserved intact PCL.At 5 years follow-up, in the intact PCL group, the mean ROM of the knee was 118.0 ± 8.3°, KSS clinical score was 89.1 ± 3.7 and KSS functional score was 84.9 ±9.6. In the PCL pie-crusting group, mean ROM of the knee was 114.0 ± 13.5°, KSS clinical score was 88.8 ± 3.4 and KSS functional score was 83.8 ± 10.5. In the PCL repair group, mean ROM of the knee was 120.3 ± 7.0°, KSS clinical score was 89.0± 3.6 and KSS functional score was 89.4 ± 4.5. There were no significant differences in ROM, KSS clinical scores and KSS functional scores among the three groups(P > 0.05).CONCLUSION The clinical outcomes of preserving the PCL in CR-TKA are encouraging. Piecrusting and PCL repair do not affect the function. The PCL protector effectively protected the PCL bone block.

2-14 Investigation of the Thermonuclear 18Ne(α, p)21Na Reaction Rate via Resonant Elastic Scattering of 21Na + p

A nuclear astrophysics experiment was performed at CRIB (CNS low-energy Radioactive-Ion Beam separator)on Mar. 2011. The goal of this experiment is to study the reaction rate of 18Ne(,p)21Na reaction, which mightbe a key breakout reaction from the hot CNO cycle to rp-process in X-ray burst and nova. Yet its reaction rate ispoorly known.Explosive hydrogen burning is thought to be the main source of energy generation and a source of nucleosynthesisin X-ray burst and nova[1;2]. For example, XRBs are characterized by a sudden increase of X-ray emission withinonly a few seconds to a total energy output of about 1040 ergs, which is observed to repeat with some regularity.The recurrence time for single bursts can range from hours to days at the typical temperature of 0.4～2 GK. Thebursts have been interpreted as being generated by thermonuclear runaway on the surface of a neutron star thataccretes H- and He-rich material from a less evolved companion star in a close binary system. As shown in Fig. 1,under its typical temperature, the hydrogen burning in X-ray burst occurs from the hot CNO cycle:

GENERAL THEORY FOR APPARENT ENERGY DISTRIBUTION OF SEA WAVES

This paper presents a general theory for the apparent energy distribution of sea waves. Using the joint distribution of wave periods and heights proposed earlier by the second author, the authors define the generalized apparnt energy distribution and derive the analytical form of the so called generalized outer frequency spectrum or nth-order frequency spectrum. Some possible relationships between it and the Fourier frequency spectrum are discussed. It is shown that the widely used Bretschneider spectrum can be easily obtained from the above definition and that generalized outer frequency spectrum has equilibrium range with exponent -(n+3) whose upper limit is -3.

ALGORITHMS FOR A SYSTEM OF GENERALIZED MIXED EQUILIBRIUM PROBLEMS AND A COUNTABLE FAMILY OF SOME NONLINEAR MULTI-VALUED NONEXPANSIVE-TYPE MAPS

In this paper, relaxed iterative algorithms of Krasnoselskii-type and Halpern-type that approximate a solution of a system of a generalized mixed equilibrium problem anda common fixed point of a countable family of totally quasi-C-asymptotically nonexpansivemulti-valued maps are constructed. Strong convergence of the sequence generated by thesealgorithms is proved in uniformly smooth and strictly convex real Banach spaces with Kadec-Klee property. Furthermore, several applications of our theorems are also presented. Finally,our theorems are significant improvements on several important recent results for this classof nonlinear problems.

Chemical Affinity and the Density of Energy Levels

It is shown that the state of chemical equilibrium of a closed system corresponds to the minimum density of its energy levels.

Long-range angular correlation in dissipative reaction of ^(27)Al+^(27)Al

Angular correlation of excitation functions in dissipative heavy ion collision 27Al+27Al has been measured. The incident beam energies ranged from 114MeV to 127MeV in steps of 200keV. The angular analysis region was continuous from 50°to 90°in the center of mass system. An angular coherent width, at least 4n° was obtained. This long-range angular correlation could not be interpreted in the framework of the standard statistical reaction theory with state of equilibrium or near equilibrium, maybe it reveals the formation of a new kind of dissipative structure in the reaction of 27Al+27AI with the state that is far from equilibrium.

数字经济发展协同推进增长降碳的动态效应研究

构建居民、厂商(包含数字经济厂商)、政府3部门DSGE模型,重点研究数字基础设施、数字产业化、产业数字化等随机冲击协同推进增长降碳的动态效应及其传导机制。研究发现:数字基础设施、数字产业化、产业数字化3类数字经济随机技术冲击能够有效促进经济增长并减缓碳排放总量和碳排放强度;数字经济投资冲击能够显著减缓碳排放总量和碳排放强度,对数字经济产出和经济增长也有正向促进作用;数字经济对新型基础设施投资推动效应越强,所引致的环境经济效果越佳;数字经济结构调整能够显著推进数字经济产出和碳减排。整体来看,数字经济随机技术冲击、数字经济投资冲击、数字经济结构调整等不同政策呈现出增长降碳协同效应。

全膝关节置换中BrainlabKnee3导航辅助间隙平衡技术的应用优势

背景:近年来,计算机导航技术辅助关节置换逐渐受到医疗领域的关注。文献报道计算机导航在全膝关节置换中的应用临床效果不一。为了探索新一代Brainlab Knee 3导航系统的临床效果,进行了此项研究。目的:分析计算机导航系统(Brainlab Knee 3)结合间隙平衡技术在全膝关节置换中的应用效果。方法:2020年11月至2021年5月大连市第二人民医院关节外科收治71例行全膝关节置换患者,导航组35例,术中采用计算机导航结合间隙平衡技术行全膝关节置换;传统组36例,术中采用传统手术器械定位截骨。比较两组患者术中内、外侧关节间隙差;膝关节活动度、KSS评分;髋膝踝角;冠状面股骨组件角、冠状面胫骨组件角和矢状面胫骨组件角偏差值。结果与结论:①导航组伸直位内外侧间隙差0,1,2 mm的患者分别为19,14,2例;屈膝90°位内外侧间隙差0,1,2 mm的患者分别为18,15,2例。传统组伸直位内外侧间隙差0,1,2 mm的患者分别为10,20,6例;屈膝90°位内外侧间隙差0,1,2 mm的患者分别为10,15,8例。②导航组手术时间长于传统组(P<0.05),导航组有2例患者术后形成下肢肌间静脉血栓,传统组患者均无并发症。③置换后6,12个月两组患者膝关节活动度均明显增加,导航组膝关节活动度高于传统组(P<0.05)。④置换后12个月两组患者KSS评分均明显增加,导航组KSS评分高于传统组(P<0.05)。⑤置换后6个月髋膝踝角、冠状面股骨组件角、冠状面胫骨组件角、矢状面胫骨组件角偏差值均显著小于传统组(P<0.05)。⑥结果表明,采用计算机导航结合间隙平衡技术辅助全膝关节置换对关节活动度、下肢力线、胫骨假体组件位置的准确性方面具有优势,置换后关节功能恢复良好。

保乳术联合乳腔镜腋窝淋巴结清扫术治疗早期乳腺癌的效果

目的探讨保乳术联合乳腔镜腋窝淋巴结清扫术治疗早期乳腺癌的效果。方法选取2021年9月至2022年12月淄博市妇幼保健院乳腺甲状腺外科收治的66例早期乳腺癌患者作为研究对象,按照单双号分组法分为对照组和观察组,每组各33例。对照组行保乳术联合常规腋窝淋巴结清扫术,观察组行保乳术联合乳腔镜腋窝淋巴结清扫术。比较两组肩关节活动度、并发症总发生率、引流管留置时间及术后引流量。结果术后3个月,两组肩关节活动度均小于术前,但观察组大于对照组(P<0.05)。观察组并发症总发生率低于对照组(P<0.05)。观察组引流管留置时间短于对照组,术后引流量少于对照组(P<0.05)。结论保乳术联合乳腔镜腋窝淋巴结清扫术治疗早期乳腺癌,可减少对肩关节活动度的影响,降低并发症发生率,缩短引流管留置时间,减少术后引流量,值得临床推广。

带蒂旋髂浅动脉穿支皮瓣与躯干任意皮瓣修复手部电击伤致软组织缺损疗效对比

目的对比分析带蒂旋髂浅动脉穿支皮瓣与躯干任意皮瓣修复手部电击伤致软组织缺损的临床疗效。方法选取2017年5月至2022年6月河南科技大学第一附属医院收治的82例手部电击伤致软组织缺损患者作为研究对象,按照不同治疗方式将其分为试验组(40例)和对照组(42例),试验组患者软组织缺损创面采用带蒂旋髂浅动脉穿支皮瓣进行修复,对照组患者软组织缺损创面采用躯干任意皮瓣进行修复,对比观察两组患者皮瓣血管蒂长度、住院时间、创面愈合时间、手指关节总主动活动度、皮瓣受区支配区域感觉功能与并发症(淋巴瘘、血管危象、瘢痕挛缩)发生情况。结果试验组患者皮瓣血管蒂长度为(789±113)cm,明显长于对照组患者的皮瓣血管蒂长度(629±121)cm(t=6181,P<0001);住院时间为(3114±492)d、创面愈合时间为(4019±1023)d,明显短于对照组患者的住院时间(3358±503)d、创面愈合时间(4662±1141)d(t=2219、2682,P=0029、0009)。术后4个月,试验组患者手指关节总主动活动度为良20例、中16例、差4例,明显优于对照组患者的手指关节总主动活动度为良10例、中20例、差12例(Z=-2762,P=0006);试验组患者皮瓣受区支配区域感觉功能为5级8例、4级12例、3级11例、2级7例、1级2例,明显优于对照组患者的皮瓣受区支配区域感觉功能为5级1例、4级10例、3级10例、2级13例、1级7例、0级1例(Z=-3005,P=0002)。试验组患者术后并发症发生率为1750%,明显低于对照组患者的术后并发症发生率4048%(χ^(2)=5224,P=0022)。结论与躯干任意皮瓣相比,带蒂旋髂浅动脉穿支皮瓣可有效修复手部电击伤所致的软组织缺损,促进手部运动功能及感觉功能恢复,降低淋巴瘘等并发症发生率。

膝关节骨性关节炎全膝关节置换术中新型改良3D PSI的应用效果观察

目的探究膝关节骨性关节炎(knee osteoarthritis,KOA)全膝关节置换术(total knee arthroplasty,TKA)中新型改良3D打印个体化导向(patient specific in-strumentation,PSI)的应用效果。方法选取2021年1月至2022年1月解放军联勤保障部队九二〇医院100例KOA患者,采用随机数字表法分为2组,每组50例。对照组采用常规TKA治疗,研究组采用新型改良3D PSI辅助TKA治疗。观察患者手术情况、术后康复情况、并发症、假体组件位置偏差、膝关节活动度(range of motion,ROM)、下肢力线参数[冠状位股骨远端机械轴外侧角(mechanical lateral distal femoral angle,mLDFA)、下肢机械轴夹角(hip-knee-ankle,HKA)]、步态参数(支撑时间百分比、步幅、步速)、膝关节功能(hospital for special surgery,HSS评分)、生活质量(arthritis impact measurement scale 2,AIMS2评分)。结果研究组患者术中及术后出血量、术后2 d引流量较对照组少,手术时间、住院时间均较对照组短(P<0.05);研究组患者LTC角、FFC角、HKA角、LFC角、FTC角偏差均较对照组小(P<0.05);研究组患者术后3个月、6个月、12个月ROM、支撑时间百分比、步幅、步速均高于对照组,冠状位mLDFA、HKA低于对照组(P<0.05);研究组患者术后3个月、6个月、12个月HSS评分高于对照组,AIMS2评分低于对照组(P<0.05);研究组患者并发症发生率与对照组比较,差异无统计学意义(P>0.05)。结论新型改良3D PSI辅助TKA治疗KOA能优化手术情况,提高操作精度,改善患者下肢力线,促进肢体功能恢复,有助于提高生活质量,且具有较高安全性。

协同护理模式对全髋关节置换术后病人髋关节活动度、恐动症水平影响的Meta分析

目的:系统评价协同护理模式在全髋关节置换病人中的应用效果。方法:计算机检索中国知网、中国生物医学文献数据库、维普数据库、万方数据库、PubMed及the Cochrane Library等数据库已发表的关于协同护理模式在全髋关节置换术后应用的随机对照试验,检索时限为建库至2023年4月2日,经文献筛选与质量评价,采用RevMan 5.3软件对数据进行Meta分析。结果:最终纳入21项研究,涉及1868例受试对象。Meta分析结果显示:与对照组相比,观察组经协同护理干预后可明显提高病人接受3个月干预后髋关节活动度评分[MD=10.40,95%CI(7.39,13.41)]及接受6个月干预后髋关节活动度评分[MD=8.48,95%CI(6.67,10.30)]及降低术后恐动症评分[MD=―4.54,95%CI(―7.48,―1.60)]。结论:现有证据表明,协同护理模式可以有效降低全髋关节置换病人术后恐动症评分、提高病人术后髋关节活动度。

胰岛素泵在糖尿病合并结直肠癌术后全肠外营养支持中的应用

目的:探讨胰岛素泵持续皮下胰岛素输注在糖尿病合并结直肠癌术后全肠外营养支持中的应用效果。方法:选择结直肠癌术后行全肠外营养治疗(Total parenteral nutrition,TPN)的2型糖尿病患者64例,随机分成胰岛素泵持续皮下输注人胰岛素(胰岛素泵组)和人胰岛素微量注射泵持续静脉泵入(静脉泵组)。分别监测2组患者葡萄糖目标范围内时间(Time in range,TIR)、葡萄糖高于目标范围时间(Time above range,TAR)、葡萄糖低于目标范围时间(Time below range,TBR)、平均血糖波动幅度(Mean blood glucose fluctuation amplitude,MAGE)、低血糖发生情况。结果:胰岛素泵组TIR值高于静脉泵组[(76.72±8.54)%vs(72.12±8.34)%],差异有统计学意义(P<0.05);胰岛素泵组TBR值低于静脉泵组[(13.72±5.28)%vs(16.72±5.00)%],差异有统计学意义(P<0.05);胰岛素泵组MAGE较静脉泵组血糖波动更小[(2.83±1.06)mmol·L^(-1)vs(3.39±1.06)mmol·L^(-1)],差异有统计学意义(P<0.05);2组TAR值差异无统计学意义(P>0.05);2组患者低血糖发生事件因样本量太小,无比较意义。结论:胰岛素泵用于控制糖尿病合并结直肠癌术后TPN患者血糖与静脉泵注胰岛素相比,TIR值更好,血糖更加平稳。