检索结果-南通市图书馆

Effect of ultrasonic pretreatment on anaerobic digestion and its sludge dewaterability

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第9期23卷 1472-1478页

作者： Huacheng Xu Pinjing he guanghui Yu Liming Shao State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China

To investigate the effect of ultrasonic pretreatment on anaerobic digestion and sludge dewaterability and further to probe into the influencing factors on sludge dewaterability,sludge flocs were stratified into four fractions：（1） slime;（2） loosely bound extracellular polymeric substances （LB-EPS）;（3） tightly bound EPS （TB-EPS）;and （4） EPS-free *** results showed that ultrasonic pretreatment increased the anaerobic digestion efficiency by 7%–8%.Anaerobic digestion without ultrasonic pretreatment deteriorated the sludge dewaterability,with the capillary suction time （CST） increased from 1.42 to 47.3 （sec·L）/*** application of ultrasonic pretreatment firstly deteriorated the sludge dewaterability （normalized CST increased to 44.4 （sec·L）/g-TSS）,while subsequent anaerobic digestion offset this effect and ultimately decreased the normalized CST to 23.2 （sec·L）/*** dewaterability of unsonicated sludge correlated with protein （p = 0.003） and polysaccharide （p = 0.004） concentrations in the slime fraction,while that of sonicated sludge correlated with protein concentrations in the slime and LB-EPS fractions （p 0.05）.Fluorescent excitationemission matrix analysis showed that the fluorescence matters in the LB-EPS fraction significantly correlated with sludge dewaterability during anarobic digestion.

关键词： anaerobic digestion capillary suction time extracellular polymeric substances sludge dewaterability ultrasonic pretreatment

An Enhanced IRC Algorithm for LTE Downlink Receiver in Multi-cell Environment

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2014年第2期23卷 377-381页

作者： YAN Zhiting he guanghui MA Jun School of Microelectronics Shanghai Jiao Tong University

This paper proposes an enhanced Interference rejection combining(IRC) algorithm for Long term evolution(LTE) downlink receiver in multi-cell communication systems. In this algorithm, a proper Multiple input multiple output(MIMO) receive method is adopted according to Generalized likelihood ratio test(GLRT) intercell interference detection. Iteration between channel estimation and data detection is carried out to improve the performance of IRC algorithm. Simulation results show that this proposed algorithm can effectively detect intercell interference and improve Block error rate(BLER)performance and channel estimation Mean squared error(MSE) compared to non-iterative IRC algorithm, making it suitable for LTE downlink receiver in multi-cell cellular systems.

关键词： Long term evolution(LTE) Inter-cell interference Interference rejection combing(IRC) Generalized likelihood ratio test(GLRT)

hemin调控小鼠软骨细胞氧化应激的线粒体途径

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国组织工程研究 2025年第6期29卷 1183-1191页

作者：贺光辉原杰柯燕琴丘小婷张晓玲山西医科大学第二医院骨科山西省太原市030001 上海交通大学医学院附属新华医院骨科上海市200092

背景:研究显示线粒体氧化应激在膝骨关节炎发生发展中具有重要作用,hemin可以调控线粒体相关蛋白的表达。目的:研究hemin对小鼠软骨细胞氧化应激的调控及其在膝骨关节炎中的干预作用及机制。方法:①体外细胞实验:提取C57BL/6小鼠的原代... 详细信息

背景:研究显示线粒体氧化应激在膝骨关节炎发生发展中具有重要作用,hemin可以调控线粒体相关蛋白的表达。目的:研究hemin对小鼠软骨细胞氧化应激的调控及其在膝骨关节炎中的干预作用及机制。方法:①体外细胞实验:提取C57BL/6小鼠的原代软骨细胞,采用10 ng/mL的白细胞介素1β诱导构建体外骨关节炎软骨细胞模型,使用CCK-8法确定hemin(0,1,10,20,40,80,160μmol/L)干预小鼠软骨细胞的最适浓度。将软骨细胞随机分为正常组、模型组(白细胞介素1β)、hemin组(白细胞介素1β+hemin)。检测各组软骨细胞的活性氧、线粒体膜电位和凋亡情况。②动物体内实验:将成年C57BL/6小鼠随机分为正常组、模型组(骨关节炎),hemin(骨关节炎+hemin)组,每组8只,hemin治疗4周后观察小动物行为学及膝关节病理组织形态学变化,检测软骨组织细胞外基质相关蛋白表达及软骨组织细胞凋亡的变化,检测软骨组织Nrf2/HO-1蛋白的表达水平。结果与结论:①体外细胞实验:hemin作用于原代软骨细胞的最适浓度为40μmol/L,经过hemin处理的白细胞介素1β诱导的软骨细胞相对于模型组活性氧水平明显较少,线粒体膜电位明显有改善,软骨细胞凋亡减少。②动物体内实验:hemin治疗4周后,与模型组比较,hemin组的小鼠下肢功能明显转好,组织病理学评分显著改善,膝关节软骨细胞凋亡明显减少。③结果表明,hemin可以缓解白细胞介素1β诱导下的小鼠软骨细胞氧化应激,恢复线粒体功能,减少细胞凋亡。hemin可以改善膝骨关节炎细胞外基质降解、促进软骨细胞合成代谢、降低分解代谢及减少软骨细胞凋亡,可能是通过激活炎症环境中软骨细胞Nrf2/HO-1信号通路发挥的作用。

关键词：膝骨关节炎 hemin 氧化应激线粒体细胞凋亡软骨损伤

The study of lithographic variation in resistive random access memory

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第5期45卷 69-79页

作者： Yuhang Zhang guanghui he Feng Zhang Yongfu Li Guoxing Wang Department of Micro-Nano Electronics Shanghai Jiao Tong UniversityShanghai 200240China MoE Key Lab of Artificial Intelligence Shanghai Jiao Tong UniversityShanghai 200240China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China

Reducing the process variation is a significant concern for resistive random access memory(RRAM).Due to its ultrahigh integration density,RRAM arrays are prone to lithographic variation during the lithography process,introducing electrical variation among different RRAM *** this work,an optical physical verification methodology for the RRAM array is developed,and the effects of different layout parameters on important electrical characteristics are systematically *** results indicate that the RRAM devices can be categorized into three clusters according to their locations and lithography *** read resistance is more sensitive to the locations in the array(~30%)than SET/RESET voltage(he increase in the RRAM device length and the application of the optical proximity correction technique can help to reduce the variation to less than 10%,whereas it reduces RRAM read resistance by 4×,resulting in a higher power and area *** such,we provide design guidelines to minimize the electrical variation of RRAM arrays due to the lithography process.

关键词： layout lithography process variation resistive random access memory

Hardware-oriented algorithms for softmax and layer normalization of large language models

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第10期67卷 85-99页

作者： Wenjie LI Dongxu LYU Gang WANG Aokun HU Ningyi XU guanghui he School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Department of Micro/Nano Electronics Shanghai Jiao Tong University MoE Key Laboratory of Artificial Intelligence Shanghai Jiao Tong University

While large language models(LLMs) have sparked a new revolution in the field of natural language processing(NLP), their hardware accelerators have garnered tremendous attention. However, softmax and layer normalization which are the most common non-linear operations in LLMs are frequently *** paper presents hardware-oriented algorithms for both softmax and layer normalization of LLMs. We propose an approximate approach to implementing division in softmax and extend it for simultaneously computing square root and performing division in layer normalization. It replaces the original computation by multiplication and shifting. For softmax, we further approximate the exponential function by truncating its exponent and then reuse the involved subtraction. For layer normalization, we additionally simplify the computation of denominator by directly removing the term regarding the square of the mean. Furthermore,hardware architectures are developed for the proposed algorithms of softmax and layer normalization. They can work as plug-and-play units for LLM accelerators, requiring no fine-tuning and introducing negligible performance loss. Compared with the state-of-the-art designs, the proposed softmax architecture can save up to 23.45% area cost and 17.39% power consumption, while the proposed layer normalization architecture can save up to 32.70% area cost and 14.29% power consumption.

关键词： large language model softmax layer normalization hardware architecture Transformer

Identification Method for Single-line-to-ground Faults with Line Break Based on Phasor Measurement in Distribution Networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2023年第3期11卷 907-916页

作者： Yadong Liu Zichang Li Yingjie Yan guanghui he Jian Fang Kejun Li Xiuchen Jiang Institute of Intelligent Power Transmission and Distribution.Shanghai Jiao Tong University Shanghai 201100China Electric Power Test Institute of Guangzhou Power Supply Bureau Co. Ltd.Guangzhou 510420China IEEE

The single-line-to-ground faults with line breaks(SLGFs-LBs)occur more and more frequently in distribution networks and can cause major safety *** is difficult to distinguish the single-line-to-ground faults(SLGFs)in resonant grounding systems and ungrounding systems due to the same electrical characteristics on the source side and uncertain operation conditions of distribution *** paper proposes a method for distinguishing SLGFs-LBs and ***,the source-side and load-side voltage characteristics of SLGFs and SLGFs-LBs are analyzed,and the phase difference between the voltages of the fault phase and non-fault phase on the load side is selected as the identification *** measurement units(PMUs)are selected as measuring ***,the effects of operation conditions and external devices in distribution networks on the proposed method are discussed,and the phase errors caused by them are calculated to correct the identification ***,the field testing and simulation experiments are conducted to verify the effectiveness and robustness of the proposed method.

关键词： Distribution network phase measurement unit single-line-to-ground fault(SLGF) identification method influencing factor

The Regulatory Role and Mechanism of Circadian Rhythm in hemoglobin Co-cultured Neurovascular Unit

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2024年第7期37卷 726-738页

作者： Fang Xue Wenchao Chen Xia Lian guanghui he Jingyuan Tian Yinghong Liu Gaiqing Wang Department of Neurology The Second Clinical School of MedicineShanxi Medical UniversityTaiyuan 030002ShanxiChina The Second Clinical School of Medicine Shanxi Medical UniversityTaiyuan 030002ShanxiChina Department of Clinical lab The First People’s Hospital of ZhaotongZhaotong 657000YunnanChina Department of Neurology Sanya Central Hospital(Hainan Third People’s Hospital)Hainan Medical UniversitySanya 57200HainanChina

Objective Intracranial hemorrhage(ICH),the second most common subtype of stroke,exacerbates the disruption of the blood-brain barrier(BBB),leading to vasogenic edema,plasma protein extravasation,and infiltration of neurotoxic *** clearance capacity of the brain plays a crucial role in maintaining BBB homeostasis and facilitating patient recovery after *** study aimed to investigate the effect of circadian rhythms on BBB function,neuronal damage,and clearance *** The transwell model and hemoglobin were co-cultured to simulate the BBB environment after *** intervention with different light groups,neuronal apoptosis was determined,glial phagocytosis was analyzed,the expression of endogenous clearing-related proteins aquaporin 4(AQP4)and low-density lipoprotein receptor-related protein 1(LRP1)was detected by western blotting and immunofluorescence dual standard method,and the expression of the tight junction protein occludin and melatonin receptor 1A(MTNR1A)was quantitatively *** Circadian rhythms play a key role in maintaining the integrity of the BBB,reducing oxidative stress-induced neuronal damage,and improving microglial ***,the expression of occludin and MTNR1A in neurovascular unit(NVU)co-cultured with hemoglobin improved the expression of AQP4 and LRP1,the key proteins in the NVU's endogenous brain clearance *** Circadian rhythm(alternating black and white light)protects the NVU BBB function after ICH,promotes the expression of proteins related to the clearance of the hematoma,provides new evidence for the clinical treatment of patients recovering from ICH,and improves the circadian rhythm to promote brain metabolism and hematoma clearance.

关键词： Blood-brain barrier Circadian rhythm Neurovascular unit Melatonin receptor 1A Aquaporin-4

Minors' Rights:Right to Privacy vs. Right to Know

在线全文

学校读者我要写书评

暂无评论

The Journal of Human Rights 2009年第2期8卷 31-33页

作者： he guanghui an associate professor at the Hunan Institute of Humanities Science and Technology

I. An Overview of the Right of Privacy for Minors and Relevant Obligee＇s Right to Learn Their Privacy The right to privacy has been recognized as an important personal right by China＇s practitioners and theorists of law although it is not an independent part of the Civil Law. In general, the right of privacy refers to the ＂right of the natural person to enjoy tranquility of private life and his or her right not to allow other persons to invade, learn, use, reveal or publish the kind of information relevant to his private life.＂

关键词： Rights Minors Right to Know

Effect of proteins,polysaccharides,and particle sizes on sludge dewaterability

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2009年第1期21卷 83-88页

作者： SHAO Liming,he Peipei,YU guanghui,he Pinjing State Key Laboratory of Pollution Control and Resources Reuse,Key Laboratory of Yangtze River Water Environment,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment College of Environmental Science and Engineering Tongji University Shanghai 200092 China. E-mail: solidwaste@***

Four batch experiments of hydrolysis and acidification were carried out to investigate the distributions of proteins （PN） and polysaccharides （PS） in the sludge, the PN/PS ratio, the particle sizes, and their relationship with sludge dewaterability （as determined by capillary suction time, CST）. The sludge flocs were stratified through centrifugation- and ultrasound-based method into four fractions：（1） slime, （2） loosely bound extracellular polymeric substances （LB-EPS）, （3） tightly bound EPS （TB-EPS）, and （4） pellet. The results showed that PN was mainly partitioned in the pellet （80.7%） and TB-EPS （9.6%） fractions, while PS distributed evenly in the four fractions. During hydrolysis and acidification, PN was transferred from the pellet and TB-EPS fractions to the slime fraction, but PS had no significant transfer trends. The mean particle sizes of the sludge flocs decreased with hydrolysis and acidification. The pH had a more significant influence on the dewaterability of sludge flocs than temperature. Sludge dewaterability during hydrolysis and acidification processes greatly deteriorated from 9.7 s at raw sludge to 340-450 s under alkaline conditions. However, it was just slightly increased under acidic conditions. Further investigation suggested that CST was affected by soluble PN, soluble PN/PS, and particle sizes of sludge flocs, but was affected slightly by total PN, PS, or PN/PS in the whole sludge flocs and other fractions （except slime）.

关键词： dewaterability extracellular polymeric substances particle size polysaccharides proteins sewage sludge