www.fasfz.com

*Փ*

ѵ51ƪ

**Study
on Hydrothermal Cracking of Heavy Oils: Formation of Radical Under Lower Reaction
Temperature**

dӢZՓȫՈc朽

ע⣺ՓAnal.
Rep. Eng. Res. Inst. Facul. Eng. Univ. Tokyo, vol.59, pp.111l

ʹՈעՓĳ̎

Jie CHANGܣ, Noritatsu TSUBAKI and Kaoru FUJIMOTO

SYNOPSIS

The hydrothermal cracking of heavy
oils, Canadian oil sand bitumen and Arabian heavy vacuum resid, as well as
their model compound were performed over Ni/Al2O3 and NiMo/Al2O3 catalysts
under 663-703 K and 5.0 MPa of hydrogen pressure in a autoclave reactor. The
conversions of heavy oils and their model compound were remarkably enhanced
by adding some free radical initiators, such as peroxide and sulfur. The reaction
mechanism on model compound, 1-phenyldodecane (PhDD), suggested that the hydrogen
in hydrocarbon was easily abstracted by free radicals that were formed from
initiators under lower temperature, and the chain reactions were readily initiated.
Therefore, the conversion was obviously increased even at lower reaction temperature.

ѵ52ƪ

**Hydrothermal
cracking of Residual Oil**

dӢՓȫՈc朽

ע⣺ՓActa Petrolei
Sinica (Petroleum Processing Section), Vol.17 (1), pp.42l

ʹՈעՓĳ̎

Kaoru Fujimoto, Jie Changܣ and Li Fan

Department of Applied Chemistry, School of Engineering, The University of
Tokyo,

Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan

**Abstract:**Hydrothermal
cracking process of residual oil has been developed by our group for many
years to upgrade heavy oil feedstock into valuable middle distillate products.
It is a tailor-made combined process of thermal cracking and catalytic hydrogenation.
This process can suppress gas and toluene insoluble coke yields and promote
middle distillate yield comparing with thermal cracking process at the same
conversion level. Hydrothermal cracking process was operated at high reaction
temperature (693~733 K) and medium hydrogen partial pressure (3.0~8.0 MPa).
Experiments were conducted in batch autoclave reactors and semi-batch reaction
systems respectively. Series of catalysts were prepared from different supports
(MgO, active carbon, SiO2 and Al2O3) and active metals ( Ni, Mo, Co and W,
etc.). Feedstock such as bitumen, AR (atmospheric resid) and VR (vacuum resid)
were tested. The structure of feedstock and products were characterized by
1H-NMR. The reuse ability and regeneration of catalysts were studied as well.
Alumina-supported catalysts showed better performance and regeneration ability.
The reaction mechanism of hydrothermal cracking was also studied by model
compound and proposed as one consisting of thermal cracking of hydrocarbon
molecules via free radical chain reactions and catalytic quench of free radicals
by hydrogen.

ѵ53ƪ

**Free-surface
waves and far wakes generated by a floating body in a viscous fluid. Journal
of Hydrodynamics**

dӢZՓȫՈc朽

ע⣺Փ.
Journal of Hydrodynamics, Ser. B, Vol. 15, No. 4, pp.10-16. Aug. 2003.l

ʹՈעՓĳ̎

Lu Dong-qiang.(R|)

Department of Mechanical Engineering, The University of Hong Kong, Hong Kong,
China

Shanghai institute of Applied Mathematics and Mechanics, Shanghai University,
Shagnhai, 200072, China

**Abstract: **The free-surface
waves and the flow field due to a body moving on the surface of an incompressible
viscous fluid of infinite depth were studied analytically. The floating body
was modeled as a normal point pressure on the free surface. Based on the Oseen
approximation for governing equations and the linearity assumption for boundary
conditions, the exact solutions in integral form for the free-surface elevation,
the velocities and the pressure were given. By employing Lighthill's two-stage
scheme, the asymptotic representations in far field for large Reynolds numbers
were derived explicitly. The effect of viscosity on the wave profiles was
expressed by an exponential decay factor, which removes the singular behavior
predicted by the potential theory.

**Keywords:** free-surface waves, velocity distribution, floating body,
viscosity, asymptotic representation, Lighthill's two-stage scheme

ѵ54ƪ

**ǾˮHamiltonϵyՓcоMչ**

dՓȫՈc朽

ע⣺ՓWMչ
284,521-531,
199811l

ʹՈעՓĳ̎

, R|,
,

ϺWϺБÔWWоϺ200072

**ժҪ** Փc㷨HamiltonWеđCǾˮHamiltonՓоMչUǾˮHamilton׃ԭcăԽc̽ӑKdV̺BBM̵HamiltonQcغǾˮHamiltonодMһоĆ}ͽⷨO

**PI~** Hamilton׃ԭǾˮHamiltonϵyQcغ

**Research progress
on theories and applications of Hamiltonian system in nonlinear water waves **

Zhang Baoshan, Lu Dongqiang,
Dai Shiqiang, Cheng Youliang

(Shanghai Institute of Applied Mathematics & Mechanics, Shanghai University,
Shanghai, China, 200072)

**Abstract: **This paper is
a summary of the applications of symplectic theories algorithms to Hamiltonian
mechanics and the research progress Hamiltonian formulation for nonlinear
water waves. The advantages and limitations of Hamiltonian variational principle
and approaches for nonlinear water waves are discussed. In addition, it includes
also discussions on the Hamiltonian formalism, symmetry and conservation laws
of KdV equation and BBM equation and comments on the problems concerned.

**Keywords: **Hamiltonian principle, symplectic geometry, nonlinear water
waves, Hamiltonian systems, symmetry and conservation laws.

ѵ55ƪ

**Poisson
̖xµğoFSLie**

dՓȫՈc朽

ע⣺ՓWW
1998303,307-313,
19985l

ʹՈעՓĳ̎

, R|,

ϺWϺБÔWWоϺ200072

**ժҪ** ᘌDdV̵HamiltonʽһN^CPoisson̖͟oFSLieоKdV̵HamiltonʽĵһecPoisson̖PϵõжһeֵĳֱҪlKdV̵ĵһe

**PI~** KdVHamiltonʽһePoisson̖oFSLie

**Infinite-Dimensional Lie Algebra
With a New Poisson Bracket **

Zhang Baoshan, Lu Dongqiang,
Dai Shiqiang

(Shanghai Institute of Applied Mathematics & Mechanics, Shanghai University,
Shanghai, China, 200072)

**Abstract: **For the
Hamiltonian formulation of the Korteweg-de Vires equation (KdV equation),
C.S. Gardner defined a Poisson bracket. In this paper a brand-new bracket
is defined. It is easily verified that new bracket possesses three properties
of the Poisson bracket, bilinearity, skew symmetry, Jacobi identity. The new
Poisson bracket has a close connection with C.S. Gardner's definition. In
the framework of the new Poisson bracket, all the first integrals of the KdV
equation constitute an infinite-dimensional Lie algebra. Then the necessary
and sufficient conditions for identifying the first integrals are obtained.
Finally, the method for finding first integrals of KdV equation is investigated.

**Keywords: **KdV equation, Hamiltonian formulation, first integral, Poisson
bracket, infinite-dimensional, Lie algebra..

ѵ56ƪ

**ӋCo¸OӋо**

dՓȫՈc朽

ע⣺ՓProceedings
of the 5th International Conference on Frontiers of Design and Manufacturing
(ICFDM'2002)l

ʹՈעՓĳ̎

(ISTP䛱)

ه O Sƽ r

AW Cе̌WԺ V 510640

**ժ Ҫ** ༉˼Sģڌz㷨Ĳ㲢ָԭǲ϶༉˼SģÌzcz㷨ģM༉˼S^ͨ^pُÑaƷYӳΔԱCһՔЧxaƷYԲƌƶӋ㹫ʽԌF˸MzЧcz㷨܁MOӋ

**PI~**OӋڌCBRCAz㷨GA

ЈD̖TH122 īIRaA

**RESEARCH ON COMPUTERCAIDED
CREATIVE CONCEPTUAL DESIGN METHOD **

LAI Chaoan, SUN Yanming,
HUANG Ping, ZHENG Shixiong

Institute of Mechanical Engineering, South China University of Technology,
Post Code 510640

**ABSTRACT:**According to the
model of multilevel rhombus thought (MRT), the drawbacks in CBR and GA were
analyzed and it was pointed out that the fundamental reason to their drawbacks
was their deviating from the model of MRT. Cluster analysis method was applied
with a view to bind CBR, cluster analysis and GA together to simulate a MRT
process. It was pointed out that mapping times from customer needs to physical
structure should be reduced in order to guarantee the effect of first convergence.
The definition of similarity and the arithmetic formula of similarity measure
for physical structure were put forth in order to carry out cluster analysis.
Above method improves the effect of case retrieval and the performance of
GA and aid in the design of creative artifacts.

**Keywords: ** Creative designing; Case-Based Reasoning (CBR); Cluster
analysis; Genetic Algorithms (GA)

ѵ57ƪ

**Multiple
travelling wave solutions of nonlinear evolution equations using a unified
algebraic method**

dӢZՓȫՈc朽

ע⣺Փ
JOURNAL OF PHYSICS A: MATHEMATICAL AND GENERAL 35 (2002) 6853C6872 l

ʹՈעՓĳ̎

(SCI䛱)

Engui FanF

Institute of Mathematics, Key Laboratory for Nonlinear Mathematical Models
and Methods,

Fudan University, Shanghai 200433, Peoples Republic of China

**Abstract**A
new direct and unified algebraic method for constructing multiple travelling
wave solutions of general nonlinear evolution
equations is presented and implemented
in a computer algebraic system. Compared with most of the existing
tanhmethods, the Jacobi elliptic functionmethod or other sophisticated
methods, the proposed method not only gives new
and more general solutions, but also provides
a guideline to classify the various types of the travelling wave
solutions according to the values of some parameters. The solutions
obtained in this paper include (a) kink-shaped
and bell-shaped soliton solutions, (b)
rational solutions, (c) triangular periodic solutions and (d) Jacobi and
Weierstrass doubly periodic wave solutions. Among
them, the Jacobi elliptic periodic wave
solutions exactly degenerate to the soliton solutions at a certain
limit condition. The efficiency of the method
can be demonstrated on a large variety
of nonlinear evolution equations such as those considered in this
paper, KdVCMKdV, Itos fifth MKdV, Hirota, NizhnikCNovikovCVeselov,
BroerCKaup, generalized coupledHirotaCSatsuma,
coupled SchrodingerCKdV, (2 + 1)-dimensional
dispersive long wave, (2 + 1)-dimensional DaveyC Stewartson
equations. In addition, as an illustrative sample, the properties of
the soliton solutions and Jacobi doubly periodic solutions for the Hirota
equation are shown by some figures. The links
among our proposed method, the tanh method,
extended tanh method and the Jacobi elliptic function method are
clarified generally.

ѵ58ƪ

**A
family of completely integrable multi-Hamiltonian systems explicitly related
to some celebrated equations**

dӢՓȫՈc朽

ע⣺ՓJOURNAL
OF MATHEMATICAL PHYSICS VOLUME 42, NUMBER 9 SEPTEMBER 2001:4327-4344l

ʹՈעՓĳ̎

(SCI䛱)

Engui FanF

Institute of Mathematics, Fudan University, Shanghai 200433, Peoples Republic
of China

~Received 2 October 2000; accepted for publication 4 June 2001

By introducing a spectral problem with an arbitrary parameter, we derive a KaupCNewell-type hierarchy of nonlinear evolution equations, which is explicitly related to many important equations such as the Kundu equation, the KaupCNewell ~KN! equation, the ChenCLeeCLiu ~CLL! equation, the GerdjikovCIvanov ~GI! equation,the Burgers equation, the modified Korteweg-deVries ~MKdV! equation and the SharmaCTassoCOlver equation. It is shown that the hierarchy is integrable in Liouvilles sense and possesses multi-Hamiltonian structure. Under the Bargann constraint between the potentials and the eigenfunctions, the spectral problem is nonlinearized as a finite-dimensional completely integrable Hamiltonian system. The involutive representation of the solutions for the KaupCNewell-type hierarchy is also presented. In addition, an N-fold Darboux transformation of the Kundu equation is constructed with the help of its Lax pairs and a reduction technique. According to the Darboux transformation, the solutions of the Kundu equation is reduced to solving a linear algebraic system and two first-order ordinary differential equations. It is found that the KN, CLL, and GI equations can be described by a Kundu-type derivative nonlinear Schrodinger equation involving a parameter. And then, we can construct the Hamiltonian formulations, Lax pairs and N-fold Darboux transformations for the Kundu, KN, CLL, and GI equations in explicit and unified ways.

ѵ59ƪ

**S߅·ԘOƽϵyܛSLOPE^3DOӋ**

dՓȫՈc朽

ע⣺ՓrʯWčW.2003,22(7):1121-1125
l

ʹՈעՓĳ̎

x ,2 Ц2 S2 T2

1.hWˮl늹ϵ h4300722.ЇƌWԺhrWо h 430071

**ժҪ: ** չSOƽⷨڌHеďV߅·Էҕϵyܛ3D_SLOPEƺͰlչǰ̎Oƽͺ̎Mǰ̎ǘS߅µ|ģ̎ҪӋYͿҕD@ʾԓϵy߅¹̵|ϢSҕgͷԷЙCؽYõÑ|SD@ʾ˂܉،䑪õH߅¹̆}

**PI~: ** ߅·Է Oƽⷨ Sҕ

**Three Dimensional Limit Equilibrium Analysis System Software
3D_SLOPE
for Slope Stability and its Application**

Jiang Qinghui1 Wang Xiaohai2 Feng Dingxiang2 Feng Shuren2

(1College of Water Conservancy and Hydropower Engineering, Wuhan University,430072,China)

(2 Institute of Rock and Soil Mechanics, The Chinese Academy of Sciences,
Wuhan 430071)

**Abstract ** In order to pursue three-dimensional limit
equilibrium analysis methods to widely practical applications, an interactive
visualization system software 3D_SLOPE for slope stability analysis has been
developed. It contains the pre-processor, the limit equilibrium analysis solver
and the post-processor. In the pre-processor, the construction of three-dimensional
geological model of the slope structure provides geoinformation presentation
for the limit equilibrium solver. In the post-processor, the effective three-dimensional
visualization of data sets can assist the user with interpretation and analysis
of the calculation results. The 3D_SLOPE system combined 3-D visualization
of geoinformation in slope engineering with limit equilibrium analysis for
slope stability. Because of its user-friendly interface and high-quality 3-D
graphics capabilities, the geotechnical engineers can easily apply 3D_SLOPE
to practical engineering problems.

**Key Words ** analysis of slope stability, limit equilibrium method, three-dimensional
visualization

ѵ60ƪ

**A
Model of Point-to-Face Contact for Three-Dimensional Discontinuous Deformation
Analysis**

dՓȫՈc朽

ע⣺ՓRock
Mechanics and Rock Engineering. August 18, 2003 # Springer-Verlagl

ʹՈעՓĳ̎

Q. H. Jiang1x and M. R. Yeung2

1State Key Laboratory of Water Resources and Hydropower Engineering Science

Wuhan University, Wuhan, P.R. China

2Department of Civil Engineering, The University of Hong Kong, Hong Kong,
P.R. China

Received August 30, 2002; accepted April 7, 2003

**Summary:**The key to three-dimensional discontinuous deformation
analysis (3D DDA) is a rigorous contact theory that governs the interaction
of many three-dimensional blocks. This theory must provide algorithms to judge
contact types and locations and the appropriate state of each contact, which
can be open, sliding or locked. This paper presents a point-to-face contact
model, which forms a part of the contact theory, to be used in 3D DDA. Normal
spring, shear spring and frictional force submatrices are derived by vector
analysis and the penalty method. Also given are the openclose iteration
criteria and operations performed for different changes in contact state.
Sliding at a contact can occur in any direction parallel to the contact face,
as opposed to one of two directions in two-dimensional DDA. This point-to-face
contact model has been implemented into a 3D DDA computer program, and numerical
results from several test cases demonstrate the validity of the model and
the capability of the program.

**Keywords: ** 3D DDA, point-to-face contact, open-close iteration.

ѵ61ƪ

**Dosing
system for the nanolitre range,fabricated with the AMANDA process**

dӢZՓȫՈc朽

ע⣺ՓJOURNAL OF MICROMECHANICS
AND MICROENGINEERING. 13 (2003) S85CS90l

ʹՈעՓĳ̎

P Shao(), Z Rummler and WK Schomburg

Forschungszentrum Karlsruhe, Institut fur Mikrostrukturtechnik, Postfach
3640,D-76021 Karlsruhe, Germany

**Abstract:**We present a dosing system, which consists of
four microvalves (presented by Rogge et al in the Proceedings of Eurosensors
XVI, Prague, 2002,pp 109C110) for controlling and a movable membrane for flow
measurement that divides a cavity into two chambers. The flow rate is determined
from the straining of the membrane caused by the entering fluid. The displaced
volume is detected by strain gauges integrated in the membrane. The overall
dimensions of the membrane and the entire system are 2 mm and 10 50 6
mm3, respectively. A simple control was coded for dosing a certain amount
of volume. This simple system has already achieved an accuracy of about 10%.
The dosing system is manufactured with the AMANDA process, which allows for
low-cost production of microcomponents from polymers.

ѵ62ƪ

**Polymer
micro piezo valve with a small dead volume**

dӢՓȫՈc朽

ע⣺ՓINSTITUTE
OF PHYSICS PUBLISHING JOURNAL OF MICROMECHANICS AND MICROENGINEERING. 14 (2004)
305C309l

ʹՈעՓĳ̎

Peige Shao1(), Zeno Rummler2 and Werner Karl Schomburg3

Forschungszentrum Karlsruhe, Institut fur Mikrostrukturtechnik, Postfach
3640, D-76021,Karlsruhe, Germany

**Abstract:**A polymer valve with a small dead volume in
the range of 6 nl and a response time faster than 1 ms is presented. The valve
structure is simple and therefore easy to fabricate by injection molding or
hot embossing. A layer of silicone rubber applied by a stamping technique
not only promotes the sealing of the valve but also defines the gluing area
during assembly. The fabrication is based on the AMANDA-process, which allows
low-cost batch production of polymer micro devices.

ѵ63ƪ

**C\ӌW**

dՓȫՈc朽

ע⣺ՓϺͨWW2002,36
(9):13651369l

ʹՈעՓĳ̎

,,,Mୂ

(ϺͨWCе̌WԺϺ200030)

**ժҪ**Roller-walkerALDUROOӋ˲݆ϽYCںҪBҎ\ӌWĻAPđTϵ͝L݆ϵL݆ڷoLӵļOĶλ݆\ӼsȻ˙C˵\ӌWģӑՓ˙C˵ƄԆ}óC˴\ӵėlͬrOӋC\ӌWBg_ʽC˞DֱЕr\ӌW}

**PI~ ** CƄәC\ӌWBg

ЈD̖: TP242.1 īIRa A

**Kinematic Analysis of Ice-Skater Robot**

SONG Li-bo LÜ Tian-sheng ZHANG Jia-liang FEI Yan-qiong

(School of Mechanical Engineering of Shanghai Jiao Tong UniversityShanghai200030)

**ABSTRACT ** A Ice-skater Robot of leg-wheel type is redesigned
according to Roller-walker and ALDURO. On the basis of introduction of kinematic
analysis methods, the paper founds the stationary coordinate system and the
wheel coordinate system respectively. Meanwhile, the kinematic constraint
equations of the standard centered orientable wheel is founded on the assumption
that there is no slippage in normal direction and pure rolling in tangential
direction of the wheels. Then, the kinematic model is modeled and the mobility
is discussed in the paper. And the motion condition equation of the robot
is gotten in sequence. Meanwhile, the paper designs the kinematic state space
representation of the Ice-skater Robot. At last, the paper analyzes the kinematics
of the Ice-skater Robot when it turns and skates forwards respectively.

**KEYWORDS** Ice-skater RobotMobile robot,KinematicsState space

ѵ64ƪ

**The
core doninance parameter of extragalactic radio sources**

dӢՓȫՈc朽

ע⣺ՓAsronomy
& Astrophysics June 11, 2003,1C14l

ʹՈעՓĳ̎

J.H. Fan and J.S. Zhang

Certer for Astrophysics, Guangzhou University, Guangzhou, 510400, China

**Abstract: ** In this paper, based on a paper by Liu Zhang(2002),
we have chosen a sample of 542 extragalactic sources, for which we have calculated
the core-dominance parameters and investigated the relation between core-dominance
parameter and the core and extended luminosities. The core-dominance parameter
of galaxies is smaller than that in quasars, which is smaller than that in
BL Lac objects.

**Key words ** BL Lacertae objects; general, galaxies; quasars-galaxies;
Seyfert-galaxies; jet

ѵ65ƪ

**С׃Qģ㷨tWD߅zy㷨**

dՓȫՈc朽

ע⣺ՓBWWVol.42,No.4.2002504508l

ʹՈעՓĳ̎

ԬҰ1.2 W2

(1BWԄӻϵB116024 2BWCеϵCAD&CGоB116024

**ժҪ**tWDS@ʾgҪõؼ݆m@NһN߅zy㷨MallatСģOֵ߅zyͬrģWԭģOֵ`ٺõĘOֵMMһYxKԵõؼ߅YCԓ㷨Ŀ

**PI֣**С׃Q߅zyģOֵ`ٺģ㷨

**A Method of Edge
Detection Based on Wavelet Transform and Fuzzy Algorithm**

Yuan Ye 1.2 Zhong Chongquan2
Ou Zongying 2

1Automation
Department, Dalian University of Technology, Dalian, 116024

2CAD&CG
lab, Mechanical Engineering Department, Dalian University of Technology, Dalian,
116024

**Abstract: ** In 3D render
technique of medical images, we need edges which are single pixel. In order
to meet this need, we proposed a method of edge detection, which based on
Mallat wavelet model maximum edge detection algorithm and fuzzy algorithm.
We designed a membership function for model maximum and pick suitable model
maximum , then the edge of single pixel can be detected. The experimental
results show that the algorithm is feasible.

**Keyword****s:**
wavelet transform, edge detection, model maximum, membership function, fuzzy
algorithm

ѵ66ƪ

**Wj[ʽҕXģMwҕXSؽ**

dՓȫՈc朽

ע⣺ՓڡӋCoOӋcDΌWW,2003,15(3):293-296ϰl

ʹՈעՓĳ̎

ԬҰ1.2 W2 3

(1 BWԄӻϵB116024) (2.BWCеWԺCAD&CGоB116024

3ϺWCϺ200072

**ժҪ**ᘌyĻھ_Wģ͵wҕX^̷ĲһNBPWj[ʽҕXģMSؽ㷨˶ƽЧҕWjģMwҕXɃɂSDؽSε^^WjӖģo횔zC˶MSؽ挍YCԓ^ܱ^ߵľ

**PI֣**BPWjwҕXSؽ

**3D Reconstruction
in Stereo Vision using Neural Networks implicit vision model**

Yuan Ye 1.2 Ou Zongying 2 Tian
Zhongxu3

1Automation
Department, Dalian University of Technology, Dalian, 116024

2CAD&CG
lab, Mechanical Engineering Department, Dalian University of Technology, Dalian,
116024(3.Robot Center ,Shanghai University
,Shanghai, 200072)

**Abstract: **
The classical stereo vision algorithms based on explicit model are very complicated,
an algorithm of stereo vision based on BP neural networks implicit vision
model was proposed in this paper. Multi calibration planes were placed in
the effective view field, neural network was used to approximate the process
from two image points to the 3D point, after training the BP networks a implicit
model was built, the 3D points can be reconstructed without the complicated
calibration. The experimental results show that the algorithm gains simplicity
and high accuracy.

**Keywords:** neural networksstereo
vision3D Reconstruction

ѵ67ƪ

**ƽԭë̦ݝعݗܵc**

dՓȫՈc朽

ע⣺ՓڡˮW2003275502-506ϰl

ʹՈעՓĳ̎

γȫ ꑕ

ϺWhƌWcϵ, Ϻ, 200072

**ժҪ**ë̦ݝص^^yOЇƌWԺƽԭӝɝBվCID˾ƷĹσx͝ЎNֲĹMМy80CֲƷNͬĘքeQs1g˾ParrʽӋyоlFë̦ݝؽȺNë̦ݵă,
47.41molm-2s-1̫ꖿݗܺLȹЧݗAӋٵЧӋ, OֵǼ, քe1.3945%3.1879%,
OСֵ, քe0.0020%0.0046%ë̦ݷNȺʞ2.54%زֲͬȺ²ֲֵë̦Ⱥĵ²ƽֵ@fë̦ݷNȺ^ߵDЧڵ²ڲͬӴεSȵ²ֵڅfpڅݵ

**PI~**ë̦BϵyaЧ

**The utilization and distribution of the
sunshine radiant energy of Carex lasiocarpa wetland in Sanjiang Plain**

He Chiquan Li Lei Gu Chao Lu Xiaoyi

(Department of Environmental Science and Engineering, Shanghai University;Shanghai,200072)

**Abstract: ** Carex lasiocarpa is a rhizomatous clonal species
of mire wetlands in Northeastern of China. The fieldwork about physical process
of Carex lasiocarpa wetlands was carried out in the Shangjiang Plain Mire
Wetlands Ecological Experiment Station in Chinese Academy of Science in Northeastern
of China (4731`N, 13331`E). The field work was carried out in a typical
Carex lasiocarpa wetlands, which areas is 200450m2 and it can divided into
three areola, namely the determined areola of biomass; the determined areola
of wither biomass and its decompose areola, and then it was setup each other
which was used to sampling and observation from May to October in 1998-1999the
frequency was about 30d, the sampling area was 11 m2 with 2~3 times. The
plants were divided into different compartments, in which is leaf, sheath,
rhizome, inflorescence, spike, radicula and dead standing sampling, and dried
to constand weight at 80C, after which they were ground and samples were
taken for analysis. The plant caloric value is determined by Parr type Oxygen
bomb heat meter which is made in America. The photosynthesis is determined
by photosynthesis meter, which is made in CID company in America; is analys
Plant photosynthesis is the original force to impel and to support the whole
ecosystem, we found that the net photosynthesis rate of Carex lasiocarpa is
biggest than others in Carex lasiocarpa wetland, which is 47.41molm-2s-1.
In the basis of the overall sunshine radiation and the photosynthesis availability
radiation to count the energy utilization rate of each organs/component, the
maximum is radicula, which are 1.3945% and 3.1879%, the minimal value is spike,
which are 0.0020% and 0.0046%the energy utilization efficiency of Carex lasiocarpa
population is 2.54%. The average value of underground organs/components energy
content of Carex lasiocarpa community is biggest than its in others community,
which showed that C. lasiocarpa had higher energy productive efficiency and
most energy was stored in their under-ground part, the reason for these were
also discussed. In the allocation of energy content in different underground
layer, with the increase of soil depth, energy content in different underground
layer is decrease by degrees.

**Keywords:** Carex lasiocarpa, wetland ecosystem, photosynthesis, primary
production efficiency, energy content

ѵ68ƪ

**THE
ALLELOPATHIC EFFECT OF Acorus tatarinowii UPON ALGAE**

dӢZՓȫՈc朽

ע⣺Փ*Journal of Environmental Science.* 2001, 13(4):481-484ϰl

ʹՈעՓĳ̎

Chiquan He(γȫ)

The department of Environmental Science & Engineering, Shanghai University;
Shanghai 200072, China

Changke WangLƣ

Changchun Institute of Geography, Chinese Academy of SciencesChangchun, 130021China)1

**Abstract: ** Besides competing with algae for light and
mineral nutrients (i.e. N, P, etc.), the root system of Acorus tatarinowii
excretes some chemical substances, which injure and eliminate alga cells,
to inhibit the growth of the algae. When the algae cells were treated in "A.
tatarinowii water", some of the chlorophyll a were destroyed and the photosynthetic
rate of algae decreased markedly and the ability of alga cells to deoxidize
triphenyltetrazolium chloride (TTC) reduced greatly. Then alga cells turned
from bright red to bluish green under fluorescence microscope. These showed
that the allelopathic effects of A. tatarinowii on algae were obvious and
planting A. tatarinowii can control some green algae. The experiment on the
extractions of the secretions of the root system showed that the inhibitory
effect had a concentration effect. If the concentration of the root secretion
was below 30ul/disc, the inhibitory rate was negative; if it was over 45ul/disc,
the inhibitory rate was positive. This proved that the influence of the root
secretion on the same acceptor was a kind of concentration effect. When the
concentration of the root secretion was low, it promoted the growth of algae;
when the concentration reached a definite threshold value, it restrained the
growth of algae. In present case, the threshold value was between 30 ul/disc
and 45 ul/disc.

**Keywords:** Acorus tatarinowii Allelopathy Algae Wetlands

69ƪ

**䓽OӋɿԷ**

dՓȫՈc朽

ע⣺ՓڡˮW 2002(4):88-92,96ϰl

ʹՈעՓĳ̎

R

BẆc| B 116024

**ժҪ**ڬFнOӋҎGBJ11-89䓽OӋSC׃ƉĿɿcʧЧģʽMɵĴwϵMonte
CarloģM䓽OӋĿɿc˲ͬS䓽ƉڏƉİlĸĴ_ϵṩ

PI~䓽 ɿԷ Monte CarloģM

**Reliability Analysis for Strong
Shear-Weak Bending Design of Reinforced Concrete Columns**

Reliability Analysis for Strong
Shear-Weak Bending Design of Reinforced Concrete Columns

Ma Hongwang

(Civil Engineering, Dalian University of Technology,116023)

**Abstract: ** Based on current
seismic design code, design parameters of reinforced concrete columns are
considered as random variables. Failure mode of columns is considered as series
system. Reliability of Strong shear-weak bending design is analyzed by Monte
Carlo simulation method. The probability of shear failure prior to flexural
failure is obtained, Aiming to provided to reference for determining shear
strength factor.

**Keywords:** reinforced concrete column Strong shear-Weak bending reliability
analysis Monte Carlo simulation

70ƪ

**䓽ڿɿՓĿOӋ**

dՓȫՈc朽

ע⣺ՓڡY 20039ϰl

ʹՈעՓĳ̎

R

ͬWľWԺYcо200092Ϻ

**ժҪ**ᘌOӋҎGB 50010-2002TκIνһOӋMпɿuOӋ䓽غdЧ͵ЧSC׃Monte
Carlo ģMóҎOӋͬȼĿɿָ˵׃OӋքe_׃SC׃ᘌfҎGBJ10-89ĿOӋȫM˱^YҎMĿOӋfҎȫ

**PI~**䓽 ɿ Monte CarloģM

**Reliability Evaluation of
Seismic Shear Design for Reinforced Concrete Beams**

Ma Hongwang , Lu Xilin

(Civil Engineering Department of Tongji University, ShangHai 200092,China)

**Abstract:** Reliability evaluation
for seismic shear design of general reinforced concrete frame beams designed
following The Code(GB 50010-2002)is finished. The design parameters such as
strength of concrete, strength of steel, gravity load and earthquake action
are regarded as random variables. Seismic shear reliability index of the beams
is obtained by Monte Carlo simulation method. At the same time, from two aspects
of determination and uncertainty, safety of seismic shear design of beams
is compared between the new code(GB50010-2002) and the old code(GBJ10-89).
The results indicated that shear design of beams following the new code is
more safety than following the old code.

**Key words:** reinforced concrete beam; shear design; reliability

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