检索结果-南通市图书馆

Recovery and stabilization of heavy metal sludge (Cu and Ni) from etching and electroplating plants by electrolysis and sintering

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2009年第5期52卷 644-651页

作者： tsai LungChang tsai FangChang Graduate School of Environment and Safety Engineering National Yunlin University of Science and Technology Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei University Faculty of Material Science and Engineering Hubei University

This work dealt with the recovery and stabilization of the sludge with heavy metals (Cu and Ni) produced from etching and electroplating plants. The heavy metals in the sludge were deprived of by acid leaching, followed by precipitation with 28% NH4OH, and finally by electrolysis. In the electrolysis, the recovery percentage and purity were investigated at different electronic currency and temperature. The metal-deprived sludge was stabilized by mixing with glass powder and clay, followed by sintering at high temperature. How the ratio of glass powder to metal-deprived sludge affected final products (sludge bricks) was explored, in terms of specific gravity, absorption capacity, unconfined compressive strength, morphology, the volume shrinkage ratio and burn-up ratio. The volume shrinkage ratio and burn-up ratio of sludge bricks increased with metal-deprived sludge contents. The heavy metal remaining in sludge bricks was assessed through TCLP (toxicity characteristic leaching procedure) and by the analysis of SEM and EDX. The results from TCLP showed that the contents of leached metals were all below the regulatory criteria. This fact approved the feasibility of our method.

关键词： heavy metal sludge treatment stability electrolysis brick material toxicity characteristic leaching procedure (TCLP)

Exploring the electromagnetic information of metasurfaces

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第12期7卷 1845-1846页

作者： Din-Ping tsai Department of Electronic and Information Engineering The Hong Kong Polytechnic University

Metasurfaces,a 2D counterpart of metamaterials,are made of planar subwavelength-scale meta-atoms with designed *** meta-atoms of a metasurface can be used to couple incident waves to free space with controllable amplitudes,phases and polarizations,yielding many novel photonic devices such as optical meta-lenses[1–4].In recent years,with the bloom of information technologies,

关键词：

Higher-mode effect on the seismic responses of buildings with viscoelastic dampers

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2002年第1期1卷 119-129页

作者： Meng-Hao tsai Department of Civil Engineering Taiwan UniversityChinese Taipei Postdoctoral Research Fellow

In conventional modal analysis procedures,usually only a few dominant modes are required to describe the dynamic behavior of multi-degrees-of-freedom *** number of modes needed in the dynamic analysis depends on the higher-mode contribution to the structural response,which is called the higher-mode *** modal analysis approach, however,may not be directly applied to the dynamic analysis of viscoelastically damped *** is because the dynamic properties of the viscoelastic dampers depend on their vibration ***,the structural stiffness and damping contributed from those dampers would be different for each *** this study,the higher-mode effect is referred to as the response difference induced by the frequency-dependent property of viscoelastic dampers at higher *** analysis procedures for buildings with viscoelastic dampers distributed proportionally and non-proportionally to the stiffness of the buildings are developed to consider the higher-mode *** studies on shear-type viscoelastically damped building models are conducted to examine the accuracy of the proposed procedures and to investigate the significance of the higher-mode effect on their seismic *** damper models are used to estimate the peak damper forces in the proposed procedures. Study results reveal that the higher-mode effect is significant for long-period viscoelastically damped *** higher-mode effect on base shear is less significant than on story acceleration *** difference of the seismic response usually occurs at the top ***,the higher-mode effect may not be reduced by decreasing the damping ratio provided by the viscoelastic *** practical application,it is realized that the linear viscous damping model without considering the higher-mode effect may predict larger damper forces and hence,is on the conservative side.

关键词： model analysis viscoelastic dampers higher-mode effect

A novel multisignature scheme for a special verifier group against clerk and rogue-key attacks

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第4期11卷 290-295页

作者： Jia-lun tsai Tzong-chen WU Kuo-yu tsai Department of Information Management National Taiwan University of Science and Technology Taiwan Information Security Center National Taiwan University of Science and Technology

The digital signature is a very important subject for network *** multiple signers and multiple verifiers,Xie and Yu(2004) pointed out that the multisignature scheme of Laih and Yen(1996) is vulnerable to a harmful *** attack can occur when a specified group of verifiers cooperate to forge a multisignature by secret key substitution following the leak of a secret key or by group public key adjustment during the process of renewing *** and Yu proposed an improvement of Laih and Yen's multisignature *** this paper,we show that Xie and Yu's scheme is vulnerable to clerk and rogue-key *** propose an improved multisignature scheme to resist such *** the proposed scheme,multiple signers can generate a multisignature for the message with the signers' secret keys,and the specified group of verifiers can cooperate to verify the validity of the multisignature with the signers' public keys and the verifiers' secret *** proposed scheme for a special verifier group not only has the advantages of Xie and Yu's scheme,but also is secure against clerk and rogue-key attacks.

关键词： Multisignature Clerk attack Rogue-key attack Cryptosystem

State synchronization in process-oriented chaincode

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2019年第6期13卷 1166-1181页

作者： Lian YU Wei-Tek tsai School of Software&Microelectronics Peking UniversityBeijing 102600China State Key Laboratory of Software Development Environment School of Computer Science&EngineeringBeihang UniversityBeijing 100191China Comp. Info.and Dec.Systems EngineeringArizona State UniversityTempeAZ 85287USA

Business processes often involve operational processes,contracts,and *** modeling of such processes must address regulation monitoring and enforcement and maintain a reliable history of data for *** study proposes modeling business processes as chaincode(CC)on permissioned blockchains(BCs).The challenges encountered by the proposed approach are state synchronizations among distributed nodes(called authnodes)and realtime *** study separates CC executions from the state management of multiple BCs and demonstrates the validity of the proposed approach with a payment authorization system at a Chinese bank.

关键词： blockchains state synchronization chaincode permissioned blockchains concurrent block building

Stimulatory effect of trans-cinnamaldehyde on norepinephrine secretion in cultured pheochromocytoma (PC-12) cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2000年第12期21卷 119-123页

作者： tsai Chin-Chuan China Medical College Department of Traditional Medicine School of Post-Baccalaureate Chinese Medicine Taichung City Taiwan 40401

AIM: The effect of trans-cinnamaldehyde (CNMA) on the release of norepinephrine (NE) from nerve terminal was investigated using rat pheochromocytoma 12 (PC-12) cells. METHODS: The amount of NA released from PC-12 cells incubated with CNMA or related substances was quantified by high performance liquid chromatogra-phy (HPLC)-electrochemical detection. The lipophilic anion bisoxonol was used to monitor the effect of CNMA on the membrane potential. RESULTS: CNMA stimulated the secretion of NE in a concentration-dependent manner from 5 μmol/L to 50 μmol/L, while the value of lactate dehydrogenase in the incubated medium was not influenced by CNMA. However, acetaldehyde, cinnam-ic acid, cinnamoyl chloride and cinnamamide failed to produce similar effect. The action of CNMA can thus be considered specific. The depolarizing effect of CNMA on the membrane potential was also illustrated by a concentration-dependent increase in the fluorescence of bisoxonol , a potential-sensitive dye. Saxitoxin attenuated the

关键词： PC12 cells cinnamaldehyde bisox-onol saxitoxin 4-aminopyridine norepinephrine

p73β inhibits transcriptional activities of enhancer I and X promoter in hepatitis B virus more efficiently than p73α

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2002年第6期8卷 1094-1097页

作者： tsai-Ping Li State Key Laboratory of Molecular Biology Institute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China

AIM: p73, as a novel member of a family of p53-related transcription factors, shares redundant functions with p53, such as the abilities of inducing apoptosis and suppressing growth. It is well known that p53 can repress HBV expression and transcription efficiently. The aim of this paper is to investigate the transcriptional effect of p73α and p73β on hepatitis B virus (HBV) and to understand the correlation between HBV and ***: To construct an x-gene inactivated HBV plasmid which was cotransfected with p73α or p73β expression vectors into HepG2 cells. After transiently transfecticn, HBV surface antigen (HBsAg) and HBV e antigen (HBeAg) were detected by ELISA. Viral transcripts synthesized by HBV were evaluated by Northern blotting analysis. The activities of HBV regulatory elements, including enhancer Ⅰ/X promoter (ENI/Xp) and enhancer Ⅱ/core promoter (ENⅡ/Cp) were monitored by luciferase ***: Both p73α and p73β could repress HBsAg and HBeAg expression by downregulating the ENⅠ/Xp and ENⅡ/Cp activities. But p73β exerted stronger inhibition on the activity of ENI/Xp than p73α, resulting in much lower level of viral transcripts and the antigens ***: p73β as a novel member of p53 family can efficiently inhibit HBV transcription mainly through downregulating the activities of the HBV ENI/Xp regulatory elements.

关键词： B肝病毒 I增强子 X启动子转录活性 p73β 抑制作用 p73α

Fault tolerant two-step quantum secure direct communication protocol against collective noises

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2011年第3期54卷 496-501页

作者： tsai ChiaWei HWANG Tzonelih Department of Computer Science and Information Engineering National Cheng Kung University

This work proposes two fault tolerant quantum secure direct communication （QSDC） protocols which are robust against two kinds of collective noises： the collective-dephasing noises and the collective-rotation noises, respectively. The two QSDC protocols are constructed from four-qubit DF states which consist of two logical qubits. The receiver simply performs two Bell state measurements （rather than four-qubit joint measurements） to obtain the secret message. The protocols have qubit efficiency twice that of the other corresponding fault tolerant QSDC protocols. Furthermore, the proposed protocols are free from Trojan horse attacks.

关键词： collective noise quantum secure direct communication quantum cryptography

Methods of Mitigating the Paradox of Compassion in the Organizational Behavior of Government Employees: A Case of Animal Protection Agencies in Taiwan

在线全文

学校读者我要写书评

暂无评论

Cultural and Religious Studies 2020年第5期8卷 255-273页

作者： Wu Chuang-Hsien tsai ya-Chuan National University of Tainan TaiwanRepublic of China National Chengchi University TaiwanRepublic of China Council of Agriculture TaiwanRepublic of China

According to psychologists,for workers whose job is to help others,their quality of service is improved if they have ***,compassion potentially produces the side effect of compassion fatigue,which decreases service *** to sociologists,professionals who must interact with animals,such as veterinarians or butchers adopt the role of a“gate-keeper”.Specifically,these professionals are troubled by the conflict between compassion and the faithful execution of the *** conflict induces,in them,harmful behavior toward the *** verify these arguments,we empirically investigated government employees in a Taiwan Residents animal protection *** from structural equation modeling indicate that although compassion toward animals can increase discretionary effort and mitigate ethics exhaustion,compassion fatigue weakened the factors mitigating ethics exhaustion,which increased harm toward the ***,to relieve compassion fatigue,the workload of government employees must be reduced.

关键词： gate-keeper compassion compassion fatigue structural equation modeling