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A NONMONOTONIC TRUST REGION TECHNIQUE FOR NONLINEAR CONSTRAINED OPTIMIZATION

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Journal of Computational Mathematics 1995年第1期13卷 20-31页

作者： zhu de-tong(Shanghai Normal University, Shanghai, China ) 上海师范大学上海

In this paper, a nonmonotonic trust region method for optimization problems with equality constraints is proposed by introducing a nonsmooth merit function and adopting a correction step. It is proved that all accumulation points of the iterates generated by the proposed algorithm are Kuhn-Tucker points and that the algorithm is q-superlinearly convergent.

关键词： Zhang A NONMONOTONIC TRUST REGION TECHNIQUE FOR NONLINEAR CONSTRAINED OPTIMIZATION ER

Imaging characteristics of brain microstructure and cerebral perfusion in Crohn’s disease patients with anxiety: A prospective comparative study

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World Journal of Gastroenterology 2025年第4期31卷 72-87页

作者： Ke-Cen Yue Ying-Yin zhu Jing-Wen Sun Xin-tong Wu Wen-Jia Liu Hai-Feng Shi Dalian Medical University Dalian 116044Liaoning ProvinceChina department of Radiology The Affiliated Changzhou Second People's Hospital of Nanjing Medical UniversityChangzhou Medical CenterChangzhou 213000Jiangsu ProvinceChina department of Radiology Suzhou 100 HospitalSuzhou 215000Jiangsu ProvinceChina department of Gastroenterology The Affiliated Changzhou Second People's Hospital of Nanjing Medical UniversityChangzhou Medical CenterChangzhou 213000Jiangsu ProvinceChina

BACKGROUND Anxiety is a common comorbidity in patients with Crohn’s disease(CD).Data on the imaging characteristics of brain microstructure and cerebral perfusion in CD with anxiety are *** To compare the imaging characteristics of brain microstructure and cerebral perfusion among CD patients with or without anxiety and healthy *** This prospective comparative study enrolled consecutive patients with active CD and healthy individuals who visited the study hospital between January 2022 and January *** was measured using the Hospital Anxiety and depression *** imaging characteristics of brain microstructure and cerebral perfusion were measured by diffusion kurtosis imaging and intravoxel incoherent *** total of 57 participants were enrolled. Among the patients with active CD, 16 had anxiety. Compared withhealthy individuals, patients with active CD demonstrated significantly lower radial kurtosis values in the rightcerebellar region 6, lower axial kurtosis (AK) values in the right insula, left superior temporal gyrus, and rightthalamus, and higher slow and fast apparent diffusion coefficients (ADCslow and ADCfast) in the bilateral frontal lobe,bilateral temporal lobe, and bilateral insular lobe (all P < 0.05). Compared with patients with CD without anxiety,patients with CD and anxiety exhibited significantly higher ADCslow values in the left insular lobe and lower AKvalues in the right insula and right anterior cuneus (all P < 0.05).CONCLUSIONThere are variations in brain microstructure and perfusion among CD patients with/without anxiety and healthyindividuals, suggesting potential use in assessing anxiety-related changes in active CD.

关键词： Crohn’s disease Anxiety Diffusion magnetic resonance imaging Brain perfusion Healthy controls Prospective comparative study

绿豆品种对发酵绿豆乳质构特性与感官品质的影响

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食品科学 2025年第5期46卷 106-113页

作者：刘晋琦朱童邢莉那刘双能周素梅芦晶北京工商大学食品与健康学院老年营养与健康教育部重点实验室北京市食品添加剂工程技术研究中心北京100048

本研究以中国常见的12种绿豆品种为原料制备发酵绿豆乳,分析不同品种对发酵绿豆乳质构特性与感官品质的影响。结果发现,品种B9制备的发酵绿豆乳持水力最高,为53.23%,硬度最大,为70.66 g,表观黏度最高,平均粒径为3.65μm,Zeta电位绝对值... 详细信息

本研究以中国常见的12种绿豆品种为原料制备发酵绿豆乳,分析不同品种对发酵绿豆乳质构特性与感官品质的影响。结果发现,品种B9制备的发酵绿豆乳持水力最高,为53.23%,硬度最大,为70.66 g,表观黏度最高,平均粒径为3.65μm,Zeta电位绝对值最大,为16.23 mV,该品种制备的发酵绿豆乳凝胶结构致密、孔隙小、感官得分高,适宜制备发酵绿豆乳。本研究深入挖掘影响发酵绿豆乳品质的原料特性,发现蛋白质含量和豌豆球蛋白样亚基(55 kDa)含量高的绿豆品种适宜制备质构与感官品质优异的发酵绿豆乳。上述指标可以作为筛选发酵绿豆乳适宜性加工品种的标准。

关键词：发酵绿豆乳持水性质构特性感官评价

Laguerre Geoinetry of Surfaces in R^3

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1525-1534页

作者： tong zhu LI School of Mathematical Sciences Peking University Beijing 100871 P. R. China

Let f ： M → R3 be an oriented surface with non-degenerate second fundamental form. We denote by H and K its mean curvature and Gauss curvature. Then the Laguerre volume of f, defined by L（f） = f（H2 - K）/KdM, is an invariant under the Laguerre transformations. The critical surfaces of the functional L are called Laguerre minimal surfaces. In this paper we study the Laguerre minimal surfaces in R^3 by using the Laguerre Gauss map. It is known that a generic Laguerre minimal surface has a dual Laguerre minimal surface with the same Gauss map. In this paper we show that any surface which is not Laguerre minimal is uniquely determined by its Laguerre Gauss map. We show also that round spheres are the only compact Laguerre minimal surfaces in R^3. And we give a classification theorem of surfaces in R^3 with vanishing Laguerre form.

关键词： Laguerre transformation Laguerre Gauss map Laguerre minimal surface

基于同态加密的综合能源系统完全分布式低碳经济调度

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中国电力 2025年第2期58卷 164-175页

作者：胡景成范耘豪朱同陈珍萍苏州科技大学江苏苏州215009 苏州市智能低碳技术及应用重点实验室江苏苏州215009 江苏省工业低碳技术工程研究中心江苏苏州215009

针对综合能源系统分布式调度过程中的隐私泄露问题,考虑分布式调度节点功率受限特性,提出了一种基于同态加密的完全一致性低碳经济调度方法。首先,对系统中供能单元和用能负载进行功率分析,建立综合经济性和低碳性的能源系统调度模型,... 详细信息

针对综合能源系统分布式调度过程中的隐私泄露问题,考虑分布式调度节点功率受限特性,提出了一种基于同态加密的完全一致性低碳经济调度方法。首先,对系统中供能单元和用能负载进行功率分析,建立综合经济性和低碳性的能源系统调度模型,引入供需不匹配状态估计变量,提出一种完全分布式一致性低碳经济调度算法。其次,利用同态密码学设计基于同态加密理论的信息交互策略,使节点在不泄露自身隐私数据的前提下与邻居节点安全地交换状态信息。同时同态加密技术允许直接在密文上进行运算,并确保解密后的结果与明文的直接计算结果一致,从而保证了低碳经济调度的准确性。最后,通过数值仿真实验验证了所提调度算法的有效性。

关键词：综合能源系统低碳经济调度一致性算法同态加密机制碳交易机制

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共热解副产物对生物炭吸附苯蒸气性能影响

环境科学 2025年第1期46卷 613-624页

作者：王海秋彭越徐馨墨平晓晨佟心语朱玲北京石油化工学院环境工程系北京102617

为探讨生物质原料组成及共热解副产物对生物炭物化特性的影响,选取木质素含量高和N元素含量低的稻壳(RH)与纤维素和N元素含量均高的木屑(SD)为典型原料,采用热解法合成生物炭,并在固定床上进行苯蒸气吸附评价,利用热重(TG)、扫描电镜(S... 详细信息

为探讨生物质原料组成及共热解副产物对生物炭物化特性的影响,选取木质素含量高和N元素含量低的稻壳(RH)与纤维素和N元素含量均高的木屑(SD)为典型原料,采用热解法合成生物炭,并在固定床上进行苯蒸气吸附评价,利用热重(TG)、扫描电镜(SEM)和气相色谱质谱联用仪(GC-MS)分析热解过程产生的副产物组分,结合X射线衍射(XRD)、傅里叶变换红外(FT-IR)和拉曼光谱(Raman)等方法对生物炭结构进行表征,探究共热解副产物对生物炭结构及吸附苯蒸气性能的影响机制.结果表明,所制备样品的晶体结构没有明显差别;纤维素含量高的木屑比木质素含量高的稻壳热解后比表面积高1.6倍;共热解中生物质中的原料油酸和含N元素的氨基酸分解产物氨气的协同反应,生成副产物油酸酰胺并聚集堵塞孔道,RC1比表面积最小,为134.28m^(2)·g^(−1);掺混共热解生物炭(RCn)的苯蒸气实际吸附容量比单独热解生物炭(RC和SC)以及单独热解再掺混(RC-m SC)低.共热解过程中随着木屑含量增加,油酸酰胺生成量减少,RC4的吸附容量和比表面积分别提升至238.78 mg·g^(−1)和367.37 m^(2)·g^(−1).YoonNelson动力学方程拟合结果表明,RCn吸附速率常数k值范围在0.060~0.084 min-1,均高于SC的k值(0.039 min-1),共热解有利于提升吸附速率.共热解副产物对生物炭吸附苯蒸气有抑制影响,随着掺混比的上升,抑制影响逐渐减弱;生物炭对苯蒸气的吸附符合拟一级动力学模型,并以物理吸附为主.RC3经过5次循环后的再生效率超过85%,具有较好的工业应用潜能.以上研究结果从原料组成和副产物角度分析了共热解生物炭吸附苯蒸气的关键影响因素,可为生物质减量化、资源化和无害化提供参考.

关键词：生物质组成生物炭共热解副产物油酸酰胺苯蒸气吸附

Pressure Analysis of the Initial Process of Diffusion Combustion Surge in a 350 kW Gas Boiler

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Journal of Thermal Science 2022年第2期31卷 582-589页

作者： GAO Han zhu tong PAN deng School of Mechanical Engineering Tongji UniversityShanghai 201804China

In order to meet the increasingly stringent requirements for nitrogen oxides(NOx)emissions from gas boilers,flue gas recirculation(FGR)technology is commonly used to achieve ultra-low NOx ***,under some ultra-low NOx combustion conditions with FGR,a surge phenomenon occurs in the boiler,which causes a flameout and should be *** this study,the diffusion combustion surge of gas boiler with a rated power of 350 k W and equipped with FGR device was *** characteristic analysis results of the initial process of combustion surge showed that the high-frequency component of pressure is closely related to combustion stability and its change can provide reference for the occurrence of ***,the initial process of surge was analyzed by wavelet packet entropy *** indicated that the wavelet packet entropy of pressure signals could effectively reflect the stability of combustion in the furnace,and it could also be used to study the occurrence of surge.

关键词： diffusion combustion flue gas recirculation wavelet packet entropy surge gas boiler

老年慢性心力衰竭合并肺部感染病原学特征及相关因素分析

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中国病原生物学杂志 2025年第2期20卷 220-224,229页

作者：李玉洁张彤黄照杰朱凌凌邢台市中心医院河北邢台054000

目的探析老年慢性心力衰竭合并肺部感染患者的病原学特征及其相关危险因素,为临床预防和治疗提供依据。方法选取分析本院收治的87例老年慢性心力衰竭合并肺部感染患者为本次研究对象,采集痰液标本进行病原菌鉴定。测定患者血清白细胞介... 详细信息

目的探析老年慢性心力衰竭合并肺部感染患者的病原学特征及其相关危险因素,为临床预防和治疗提供依据。方法选取分析本院收治的87例老年慢性心力衰竭合并肺部感染患者为本次研究对象,采集痰液标本进行病原菌鉴定。测定患者血清白细胞介素-6(IL-6)、C反应蛋白(CRP)、降钙素原(PCT)水平,对比不同心功能等级患者血清炎性因子水平。测定患者老年营养风险指数,分析营养风险指数与肺部感染的相关性。回顾性分析患者临床资料,对比分析老年慢性心力衰竭合并肺部感染的相关因素。结果在87例老年心力衰竭合并肺部感染患者中,共分离出91株病原菌。其中,革兰阴性菌占68.13%,主要为肺炎克雷伯菌、铜绿假单胞菌、大肠埃希菌等。革兰阳性菌占28.57%,以肺炎链球菌和金黄色葡萄球菌为主。真菌感染占3.30%,均为白色假丝酵母菌。心功能Ⅰ-Ⅱ级患者血清IL-6、CRP、PCT水平分别为(9.58±2.06)pg/mL、(58.94±18.65)mg/L、(0.98±0.33)μg/L;心功能Ⅲ-Ⅳ级患者相应水平为(11.86±2.47)pg/mL、(70.11±14.26)mg/L、(1.18±0.23)μg/L,两组间相关指标对比差异显著(P0.05)。进一步分析显示,年龄≥70岁、心功能Ⅲ-Ⅳ级、糖尿病、慢性阻塞性肺病、卧床时间≥24个月、侵入性操作是老年心力衰竭患者肺部感染的独立风险因素(P<0.05)。结论老年慢性心力衰竭合并肺部感染患者病原菌主要为革兰阴性菌,以肺炎克雷伯菌、铜绿假单胞菌为主。心功能等级越高的患者,其血清IL-6、CRP、PCT水平越高。老年营养风险指数与肺部感染的严重程度呈正相关,提示营养状况的恶化可能增加感染的风险。针对已确定的独立风险因素,采取相应预防措施,对改善预后有重要意义。

关键词：慢性心力衰竭肺部感染影响因素

Heterogeneous reactions of gaseous methanesulfonic acid with NaCl and sea salt particles

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Science China Chemistry 2009年第1期52卷 93-100页

作者： TANG MingJin zhu tong College of Environment Sciences and Engineering Peking UniversityBeijing 100871China

Methanesulfonic acid(MSA) has been identified as one of the most important intermediate products of DMS reactions in the *** considerable amounts of MSA have been found in the ma-rine boundary layer,little is known about the interaction of gaseous MSA with sea salt *** understand the fate of MSA in the atmosphere and its potential importance in atmospheric chemistry,the heterogeneous reactions of gaseous MSA with micron-scale NaCl and sea salt particles were studied using diffuse reflectance infrared Fourier transform spectrometry,X-ray photoelectron spectroscopy,and scanning electron *** CH3SO3Na and CH3SO3-were the major products of the condensed phase of the reaction of gaseous MSA with NaCl and with sea salt *** steady-state uptake coefficient was determined to be(5.94±2.32)×10-7(1 σ) for the reaction of gaseous MSA with NaCl particles and(2.23±1.25)×10-7(1 σ) for the reaction of gaseous MSA with sea salt *** heterogeneous reaction of MSA with NaCl particles was found to be first-order for *** reaction mechanisms were discussed.

关键词： methanesulfonic acid heterogeneous reaction NaCl sea salt