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Effects of nano-silicon and common silicon on lead uptake and translocation in two rice cultivars

Frontiers of Environmental Science & Engineering 2015年第5期9卷 905-911页

作者： Jianguo LIU hui cai Congcong MEI Mingxin WANG School of Environmental and Safety Engineering Changzhou University Changzhou 213164 China

The current study investigated the effects of nano-silicon （Si） and common Si on lead （Pb） toxicity, uptake, translocation, and accumulation in the rice cultivars Yangdao 6 and Yu 44 grown in soil containing two different Pb levels （500 ***-1 and 1000 ***）. The results showed that Si application alleviated the toxic effects of Pb on rice growth. Under soil Pb treatments of 500 and ***-1, the biomasses of plants supplied with common Si and nano-Si were 1.8%-5.2% and 3.3%- 11.8% higher, respectively, than those of plants with no Si supply （control）. Compared to the control, Pb concentra- tions in rice shoots supplied with common Si and nano-Si were reduced by 14.3%-31.4% and 27.6%-54.0%, respectively. Pb concentrations in rice grains treated with common Si and nano-Si decreased by 21.3%-40.9% and 38.6%--64.8%, respectively. Pb translocation factors （TFs） from roots to shoots decreased by 15.0%-29.3% and 25.6%-50.8%, respectively. The TFs from shoots to grains reduced by 8.3 %--13.7% and 15.3%-21.1%, respectively, after Si application. The magnitudes of the effects observed on plants decreased in the following order： nano-Si treatment 〉 common Si treatment and high-grain- Pb-accumulating cultivar （Yangdao 6）〉 low-grain-Pb- accumulatir~ cultivar （Yu 44） and heavy Pb stress （1000 ***-1）〉 moderate Pb stress （500 mg-kg-1）〉 no Pb treatment. The results of the study indicate that nano-Si is more efficient than common Si in ameliorating the toxic effects of Pb on rice growth, preventing Pb transfer from rice roots to aboveground parts, and blocking Pb accumulation in rice grains, especially in high-Pb- accumulating rice cultivars and in heavily Pb-polluted soils.

关键词： silicon (Si) lead (Pb) rice (Oryza sativa L.),toxicity accumulation

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Connection Between Damping Torque Analysis and Energy Flow Analysis in Damping Performance Evaluation for Electromechanical Oscillations in Power Systems

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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 19-28页

作者： Yong Hu Siqi Bu Xin Zhang Chi Yung Chung hui cai Department of Electrical Engineering and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina Shenzhen Research Institute The Hong Kong Polytechnic UniversityShenzhenChina Centre for Energy Systems and Strategy Cranfield UniversityCranfieldUK Department of Electrical and Computer Engineering University of SaskatchewanSaskatoonCanada State Grid Jiangsu Economic Research Institute NanjingChina

The damping performance evaluation for electromechanical oscillations in power systems is crucial for the stable operation of modern power *** this paper,the connection between two commonly-used damping performance evaluation methods,i.e.,the damping torque analysis(DTA)and energy flow analysis(EFA),are systematically examined and revealed for the better understanding of the oscillatory damping ***,a concept of the aggregated damping torque coefficient is proposed and derived based on DTA of multi-machine power systems,which can characterize the integration effect of the damping contribution from the whole power ***,the pre-processing of measurements at the terminal of a local generator is conducted for EFA,and a concept of the frequency-decomposed energy attenuation coefficient is defined to screen the damping contribution with respect to the interested *** this basis,the frequency spectrum analysis of the energy attenuation coefficient is employed to rigorously prove that the results of DTA and EFA are essentially equivalent,which is valid for arbitrary types of synchronous generator models in multi-machine power ***,the consistency between the aggregated damping torque coefficient and frequency-decomposed energy attenuation coefficient is further verified by the numerical calculation in case *** relationship between the proposed coefficients and the eigenvalue(or damping ratio)is finally revealed,which consolidates the application of the proposed concepts in the damping performance evaluation.

关键词： Electromechanical oscillation damping performance damping torque analysis(DTA) energy flow analysis(EFA) frequency spectrum

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An Edge-rotating Theorem on the Least Eigenvalue of Graphs

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 945-952页

作者： Rui-fang LIU hui-cai JIA Jin-long SHU School of Mathematics and Statistics Zhengzhou University College of Science Henan Institute of Engineering Department of Mathematics East China Normal University

Let G = （V（G）, E（G）） be a simple connected graph of order n. For any vertices u, v, w ￠V（G） with uv ∈ E（G） and uw ￠ E（G）, an edge-rotating of G means rotating the edge uv （around u） to the non-edge position uw. In this work, we consider how the least eigenvalue of a graph perturbs when the graph is performed by rotating an edge from the shorter hanging path to the longer one.

关键词： adjacency matrix least eigenvalue rotating an edge

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Cloning of Salt Tolerance-Related cDNAs from the Mangrove Plant Sesuvium portulacastrum L.

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Journal of Integrative Plant Biology 2006年第8期48卷 952-957页

作者： hui-cai Zeng Liu-Hong Deng Chun-Fa Zhang State Key Laboratory of Tropical Crop Biotechnology Institute of Tropical Bioscience and Biotechnology Chinese Academy of Tropical Agricultural Science （ CATAS） Kaikou 571101 China Environmental and Plant Protection Institute CATAS Danzhou 571737 China

In an attempt to isolate and identify the target genes relevant to salt tolerance in a mangrove plant （Sesuvium portulacastrum L.）, a subtracted cDNA library was constructed via suppressive subtractive hybridization （SSH）, in which the poly（A）＋RNA isolated from salt-tolerant S. portulacastrum leaves was used as a tester, whereas the driver was poly（A）＋RNA, derived from salt-sensitive S. portulacastrum leaves. Screening of this subtracted cDNA library revealed five clones, of which the expression levels in the salt-tolerant plant were markedly higher than those observed in the salt-sensitive plant, indicating that these candidate clones may be involved in salt-tolerance pathways. Among the clones isolated, P66, P175, and P233 are novel because no significant similarity was obtained upon alignment with the GenBank database. Clone P89 demonstrated high homology with NADPH of Arabidopsis thaliana, whereas clone P152 was highly homologous with the gene encoding late embryogenesis abundant （LEA） protein of A. thaliana. The full-length gene of clone P152, with a predicated 344 amino acid residues, was shown to bear LEA-2 domains, a signature motif for proteins that have been enriched under salty and drought conditions. It is thus implied that clone P152 would be a salt-tolerance gene of S. portulacastrum. In addition, we have also developed a strategy for the extraction of total RNA from mangrove plants.

关键词： mangrove salt tolerance-related cDNAs Sesuvium portulacastrum suppressive subtractive hybridization.

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Microstructure and Tensile Properties of a Nb–Mo Microalloyed 6.5Mn Alloy Processed by Intercritical Annealing and Quenching and Partitioning

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Acta Metallurgica Sinica(English Letters) 2017年第7期30卷 665-674页

作者： Ming-hui cai Hong-Shou Huang Hai-Jun Pan Sheng-hui Sun Hua Ding Peter Hodgson School of Materials Science and Engineering Northeastern University Institute for Frontier Materials Deakin University

The transformation behavior, microstructural evolution and mechanical properties were compared in a coldrolled Nb–Mo microalloyed 6.5Mn alloy after intercritical annealing（IA） and quenching and partitioning（Q ＆ P）,respectively. The thermodynamic calculation and theoretical analysis were used to determine the optimal heat treatment parameters. The Q ＆ P samples exhibited relatively higher strength with relatively low ductility, mainly due to the hard martensite matrix, which resulted in continuous yielding behavior upon loading, whereas the IA samples showed the significantly improved ductility, which benefited from the more sufficient transformation-induced plasticity（TRIP） effects and the softer ultrafine ferrite matrix. The dependence of yield point elongation（YPE） of IA samples on grain size demonstrated that the YPE value was in the reverse proportional relationship to the average grain size, which agreed well with theoretical analysis.

关键词： Medium Mn steel Intercritical annealing Quenching and partitioning Mechanical properties TRIP effect Yield point elongation

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Manufacturability and mechanical reliability study for heterogeneous integration system in display(HiSID)

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Advances in Manufacturing 2023年第2期11卷 191-202页

作者： Hao-hui Long hui-cai Ma Jia-Ying Gao Li Zhang De-Ming Zhang Jian-Qiu Chen Huawei Device Co. Ltd.Shenzhen518129GuangdongPeople's Republic of China

In this paper,the system on display panel(SoDP)architecture,the primary stage of heterogeneous integration system in display(HiSID),is introduced for the first *** this architecture,the driving components of display,which are supposed to be on the display flexible print circuit(FPC)in traditional architecture,are innovatively integrated onto the backside of display *** the SoDP architecture,the simulated impact strain in the panel fan-out region can decrease about 30%compared to the traditional architecture,and SoDP provides more the 10 mm extra space in the in-plane Y-direction for holding a larger ***,the SoDP is compatible with the current organic laser emitted diode(OLED)and system in package(SiP)*** the primary stage,this paper also presents a comprehensive and extensive analysis on the challenges of the manufacturability for the advanced stage of HiSID from four key technologies perspectives:device miniaturization,massive manufacturing,driving technology,and advanced heterogeneous integration.

关键词： Display Heterogeneous integration system in display(HiSID) Manufacturability Mechanical reliability System on display panel(SoDP)

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Effects of Si on the stability of retained austenite and temper embrittlement of ultrahigh strength steels

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 543-550页

作者： Li-jun Wang Qing-wu cai hui-bin Wu Wei Yu National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 China

Effects of silicon （Si） content on the stability of retained austenite and temper embrittlement of ultrahigh strength steels were investigated using X-ray diffraction （XRD）,transmission electron microscopy （TEM）,and other experimental *** results show that Si can suppress temper embrittlement,improve temper resistance,and hinder the decomposition of retained *** austenite appears gradually with the increase of Si content during *** has a significant effect on enhancing carbon （C） partitioning and improving the stability of retained *** and C atoms are mutually exclusive in lath bainite,while they attract each other in austenite.ε-carbides are found in 1.8wt% Si steel tempered at 250℃,and they get coarsened obviously when tempered at 400℃,leading to temper *** ε-carbides but acicular or lath carbides lead to temper embrittlement in 0.4wt% Si steel,which can be inferred as cementites and composite *** embrittlement is closely related to the decomposition of retained austenite and the formation of reversed austenite.

关键词： silicon ultrahigh strength steel retained austenite temper embrittlement reversed austenite

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Performance-driven design with the support of digital tools： *** event simulation and space syntax on the design of the emergency department

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Frontiers of Architectural Research 2014年第3期3卷 250-264页

作者： David Morgareidge hui cai Jun JIA RTKL Associates Inc. 1717 Pacific Avenue Dallas TX 75201 USA Department of Architectural Studies University of Missouri 137 Stanley Hall Columbia MO 65211 USA

Ptanning the design of the emergency department （ED） is a complex process. Hospital readers and architects must consider many complex and interdependent factors, including evolving market demands, patient volume, care models, operational processes, staffing, and medical equipment. The application of digital toots, such as discrete event simulation （DES） and space syntax analysis （SSA）, arrows hospital administrators and designers to quantitativety and objectively optimize their facilities. This paper presents a case study that utitized both DES and SSA to optimize the care process and to design the space in an ED environment. DES was apptied in three phases： master planning, process improvement in the existing ED, and designing the new ED. SSA was used to compare the new design with the existing layout to evatuate the effectiveness of the new design in supporting visuat surveiltance and care coordination. This case study demonstrates that DES and SSA are effective toots for facilitating decision-making retated to design, reducing capital and operational costs, and improving organizational performance. DES focuses on operational processes and care flow. SSA complements DES with its strength in linking space to human behavior. Combining both tools can lead to high-performance ED design and can extend to broad applications in health care.

关键词： Discrete event simulation Space syntax analysis Emergency depart-ment Health care design United States Performance-drivendesign

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A Workflow Authorization Model Based on Credentials

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 198-202页

作者： XING Guang-lin HONG Fan cai hui College of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei China Shenzhen Broadeast Television University Shenzhen 518000 Guangdong China

A workflow authorization model based on credentials was proposesed. It can nicely satisfy the features that workflows in actual application should satisfying. This model uses access control list based on task state which nicely ensure synchronizing authorization flow with workflow; specifies authorization policy not only based on user identifiers but also based on user qualifications and characteristics; defines a set of constraint rules for a task and seek the eligible users to execute the task according to the type of each constraint rule which realize dynamic separation of duty; and realizes the access granularity of authorization ranging from objects to specific parts of objects which ensure the least privilege constraints much more better.

关键词： credentials workflow authorization model

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Security-constrained line loss minimization in distribution systems with high penetration of renewable energy using UPFC

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Journal of Modern Power Systems and Clean Energy 2017年第6期5卷 876-886页

作者： Pengcheng SONG Zheng XU Huanfeng DONG hui cai Zhenjian XIE Department of Electrical Engineering Zhejiang UniversityHangzhouChina State Grid Jiangsu Economic Research Institute NanjingChina

Focused on the challenges raised by the largescale integration of renewable energy resources and the urgent goal of energy saving,a novel control scheme for the unified power flow controller(UPFC)series converter is proposed to achieve line loss reduction and security enhancement in distribution systems with a high penetration of renewable ***,the line loss minimum conditions of a general distribution system with loop configurations are ***,security constraints including the permissible voltage range,the line loading limits and the UPFC ratings are *** security enhancement with the least increase in line loss is tackled by solving a much reduced optimal power flow(OPF)*** computational task of the OPF problem is reduced by deducing the security-constrained line loss minimum conditions and removing the equality ***,a hybrid control scheme is *** loss minimization is achieved through a dynamic controller,while an OPF calculator is integrated to generate corrective action for the dynamic controller when the security constraints are *** validity of the proposed control strategies is verified in a modified IEEE 33 bus test system.

关键词： Line loss minimization Security enhancement Unified power flow controller(UPFC) Renewable energy

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