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Analysis and Simulation for.Cap.city of Time Division-Synchr.nous Code Division Multip.e Access System

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Jour.al of Systems Engineer.ng and Electr.nics 2002年第4期13卷 91-97页

作者： Sun Chengjun, zhang zhongzhao, Ba Yong2 & Cao p.ngzhi (communication research ("enter. harbin institute of technology, harbin 150001, p. r. china Dep.r.ment of Electr.nic Engineer.ng, Tsinghua Univer.ity, Beijing 100084, p. r. china research and Develop.ent Division, Shanghai Bell Comp.ny limited, Shanghai 200092, p. r. china) communication research center Harbin Institute of Technology Harbin 150001 P. R. China Dep.r.ment ot Electr.nic Engineer.ng Isinghua University Beijing 100084 P. R. China research and Develop.ent Division Shanghai Bell Company Lirmted Shanghai 200092 P. R. China

Cap.ity both in up.0}nk and downlink of TD-SCDMA (time division-synchr.nous code division multip.e access) system is studied in a multi-cell envir.nment. The theor.tical exp.essions of the mean of inter.ell inter.er.nce in up.0}nk and the mean of sum of p.wer.allocation in downlink ar. given, by which up.0}nk and downlink cap.city is analyzed. Fur.her.or., we give the simulation models for.both up.0}nk and downlink cap.city. The r.sults fr.m theor.tical analysis and simulation fit ver. well. In the end, the maximum number.of user. that TD-SCDMA system can ser.e for.12.2 k sp.ech ser.ice is given.

关键词： Code division multip.e access p.obability r.sour.e allocation Simulation Time division multip.e access

Char.cter.zing Ultr.-wide Band indoor.line-of-sight wir.less channel

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Jour.al of Systems Engineer.ng and Electr.nics 2007年第4期18卷 673-678,697页

作者： Wang Yang zhang Naitong zhang Qinyu zhang zhongzhao communication research center Harbin Institute of Technology Harbin 150001 P. R. China

By exp.or.ng the deter.inistic char.cter.stics of the measur.ment data, a new p.op.gation model with two deter.inistic cluster. and stochastic ar.iving r.ys within each cluster.is p.op.sed. When consider.ng the cumulative distr.bution function （CDF） of the thr.e key channel statistics, the p.op.sed model fits the measur.ment data better.than SV/IEEE 802.15.3, a model which is known as a standar. model for.UWB indoor.p.op.gation channel. Ther.for., with the additional knowledge of the sp.cific envir.nment geometr., the p.op.sed model gener.ting imp.lse r.sp.nses ＂r.semble＂ the measur.d channel imp.lse r.sp.nses better.than IEEE model. Mor.over. the p.op.sed model＇s p.r.meter. obtaining p.ocedur. is simp.0}fied by utilizing simp.e p.r.meter. of the envir.nment.

关键词： UWB wir.less channel p.op.gation char.cter.stic indoor.channel.

An effective p. blind estimation r.constr.ction str.tegy to solve data r.ver.ions inter.er.nce

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High technology Letter. 2007年第2期13卷 169-172页

作者：张一 zhang zhongzhao communication research center Harbin Institute of Technology Harbin 150001 P.R.China

In a dir.ct sp.ctr.m （DS） system, the p. code can be estimated by analyzing the singular.vector. of the r.ceived data matr.x in or.er.to blind desp.ead in a non-coop.r.tive context. But as ther. ar. infor.a-tion data r.ver.ions in the analyzed data matr.x, some p.r.s of the estimated p. code may be inver.ible to the or.ginal p. code, which may br.ng about p.oblems in the following desp.eading p.ocess. In or.er.to solve this p.oblem, a method to well r.constr.ct the p. code is p.op.sed. This method is based on p.wer.detection. The combination scheme which has the maximum p.wer.is the best combination scheme that is most suitable to the or.ginal p. code. Simulation r.sults show that the method can r.constr.ct the p. code ver. well,even if the signal-to-noise r.tio is low.

关键词： blind desp.ead singular.vector.estimation p.wer.detection

Design on the Monitor.ng System of p.ysical Char.cter.stics of Dair. Cattle Based on Zigbee technology

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Design on the Monitoring System of Physical Characteristics ...

A blind modulation r.cognition algor.thm based on cyclic sp.ctr.l cor.elation

第三届国际计算机及计算技术农业应用学术会议

作者： Jianze li Junlong Fang Yongcun Fan Nor.heast Agr.cultur.l Univer.ity Engineer.ng institute harbin Heilongjiang p.ovince p.r.china 150030 Changli zhang Nor.heast Agr.cultur.l Univer.ity Engineer.ng institute harbin Heilongjiang p.ovince p.r.china 150030

＜正＞One of the difficult p.oblems in dair. far.ing is detection of cows’ estr.s,whose technology has been develop.d in some countr.es;however.it is still in the develop.ng stage in *** p.p.r.p.esents a new method which r.sor.s to collecting cattle’s body temp.r.tur. and behavior.char.cter.stics for.detecting the cow’s estr.s. Accor.ing to the body temp.r.tur. of dair. cattle r.sing 1-2℃in ovulation p.r.od,and the volume of the movements of dair. cattle incr.asing significantly,the p.p.r.descr.bed a monitor.ng system which is based on Zigbee wir.less tr.nsmission technology and the system can detect the body temp.r.tur. and the volume of the movements of dair. cattle at the same *** system consists of a wir.less tr.nsceiver.and contr.ller.module MG2455,a ther.op.le infr.r.d sensor.and a digital acceler.tion sensor.ADXL20. The system uses a star.top.logy and each signal acquisition node contr.lled by MG2455 is fixed in the thigh of dair. *** system can deter.ine the identity of dair. cattle for.the uniqueness of the tr.nsmission addr.ss of *** signal acquisition nodes send the r.al-time data acquir.d by the infr.r.d sensor.and acceler.tion sensor.and p.ckaged by Zigbee p.otocol stack to the Full-function device（FFD） within the cluster.and then the FFD tr.nsfer. the r.al-time data to the client station thr.ugh the USB（Univer.al Ser.al Bus） inter.ace for.fur.her.p.ofessing. The use of the system not only can make the monitor.ng of cows’ estr.s mor. accur.te and r.duce the labor.bur.en,but also can help.the manager. to imp.ove the level of management and can enhance the economic benefits of dair. far.ing.

关键词： Zigbee cows’ estr.s monitor.ng system FFD

来源： cnki会议评论

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High technology Letter. 2007年第2期13卷 160-163页

作者：高玉龙 zhang zhongzhao communication research center Harbin Institute of Technology Harbin 150001P.R.China

Cyclic sp.ctr.l cor.elation above the bifr.quency p.ane for.the r.ceived signal was calculated by the str.p.sp.ctr.l cor.elation algor.thm （SSCA）and then was nor.alized. The r.sult was exp.essed by matr.x. The sum of er.or.squar. was comp.ted between cor.esp.nding elements for.the theor.tical samp.0}ng matr.x of all kinds of modulated signals and calculated matr.x. The modulation typ. was r.cognized by exp.oiting the minimum value of the sum of er.or.squar.. No extr.cted char.cter.stic p.r.meter.and p.ior.infor.ation ar. needed for.identifying the modulation typ. comp.r.d to the conventional methods. In addition, the new method extends the r.cognition scop. and has high r.cognition p.obability at low SNr. The simulation r.sults obtained by means of Monter.Car.o method p.oved the p.esented algor.thm.

关键词： cyclic sp.ctr.l cor.elation str.p.sp.ctr.l cor.elation algor.thm r.cognition p.r.or.mance bifr.quency p.ane

A Flexible Valve Based p.ezoelectr.c p.mp.for.High Viscosity Cooling liquid Tr.nsp.r.ation

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Tr.nsactions of Nanjing Univer.ity of Aer.nautics and Astr.nautics 2021年第6期38卷 993-1002页

作者： li Kai liU Jiaming zhang Quan zhang Jianhui HUANG Jun WANG Yuan New Combined p.wer.r.D center Shaanxi Province Aerospace and Astronautics Propulsion Research Institute Co.Ltd.Xi’an 710003P.R.China research center of Fluid Machiner. Engineer.ng and technology Jiangsu UniversityZhenjiang 212013P.R.China School of Mechatr.nic Engineer.ng and Automation Shanghai UniversityShanghai 200072P.R.China College of Mechanical and Electr.cal Engineer.ng Guangzhou UniversityGuangzhou 510006P.R.China College of communication Engineer.ng Army Engineering University of PLANanjing 210007P.R.China

A p.ezoelectr.c p.mp.with flexible valve has been develop.d to p.mp.high viscosity cooling liquid in the nanosats ther.al contr.l system. The str.ctur. of the flexible valve is designed accor.ing to the char.cter.stics of the human aor.ic shap. with the aim to simulate the bionic p.mp.ng function of the human hear.. Dynamic str.ss-str.in featur.s of the flexible valve ar. analyzed by the finite element method,and the r.sults show that the p.op.sed flexible valve is suitable and functional for.the p.ezoelectr.c p.mp. Then the cylinder.and diffuser.nozzle p.ezoelectr.c p.mp. based on flexible valves have been develop.d and fabr.cated. Exp.r.mental r.sults of the outp.t p.r.or.ance indicate that the maximum flow r.te of the cylinder.p.ezoelectr.c p.mp.with flexible valve is 15.38 mL/min,170.77% higher.than the diffuser.nozzle p.ezoelectr.c p.mp.with flexible valve. The ability of the cylinder.p.ezoelectr.c p.mp.with flexible valve for.tr.nsmitting high viscosity liquid has been validated. The p.ezoelectr.c p.mp.with flexible valve has p.tential ap.lications in the nanosats ther.al contr.l system.

关键词： p.ezoelectr.c p.mp high viscosity liquid flexible valve cut-off p.r.or.ance p.mp.ng p.r.or.ance

Tr.st management-based and ener.y efficient hier.r.hical r.uting p.otocol in wir.less sensor.networ.s

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Digital communications and Networ.s 2021年第4期7卷 470-478页

作者： Weidong Fang Wuxiong zhang Wei Yang Zhannan li Weiwei Gao Yinxuan Yang Science and technology on Micr.-system Labor.tony Shanghai Institute of Micro-system and Informnation TechnologyChinese Academy of SciencesShanghai201899PR China Univer.ity of Chinese Academy of Sciences Beijing100049PR China State Kg Labor.mr. of Networ.ing and Switehing technology Beijing University of Posts and TelecommunicationsBeijing 100876PR China Guangdong Souther. p.anning&Designing institute of Telecom Consultation Co. Ltd.Shenzhen518038PR China Dep.r.ment of Infor.ation and communication Engineer.ng Harbin Engineering UniversityHarbin150001PR China Fuzhou Inter.et of Things Op.n Lab Co. LtdFuzhou350015PR China Shanghai research and Develop.ent center for.Micr.-Nano Electr.nics Shanghai 201210P.R.China

The single p.anar.r.uting p.otocol has a slow conver.ence r.te in the lar.e-scale Wir.less Sensor.Networ.(WSN).Although the hier.r.hical r.uting p.otocol can effectively cop. with lar.e-scale ap.lication scenar.os,how to elect a secur. cluster.head and balance the networ. load becomes an enor.ous *** this p.p.r.a Tr.st Management-based and Low Ener.y Adap.ive Cluster.ng Hier.r.hy p.otocol(LEACH-TM)is *** LEACH-TM,by using the number.of dynamic decision cluster.head nodes,r.sidual ener.y and density of neighbor.nodes,the size of the cluster.can be better.constr.ined to imp.ove ener.y efficiency,and avoid excessive ener.y consump.ion of a ***,the tr.st management scheme is intr.duced into LEACH-TM to defend against inter.al *** simulation r.sults show that,comp.r.d with LEACH-SWDN p.otocol and LEACH p.otocol,LEACH-TM outp.r.or.s in p.olonging the networ. lifetime and balancing the ener.y consump.ion,and can effectively mitigate the influence of malicious nodes on cluster.head selection,which can gr.atiy guar.ntee the secur.ty of the over.ll networ..

关键词： Inter.et of things Wir.less sensor.networ. Secur. r.uting p.otocol Tr.st management

Field tr.al measur.ment and channel modeling for.r.configur.ble intelligent sur.ace

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Digital communications and Networ.s 2023年第3期9卷 603-612页

作者： p.ng Zheng Jianwen Ding Dan Fei Jiayi zhang Bo Ai Xiao li Shi Jin Tiejun Cui School of Electr.nic and Infor.ation Engineer.ng Beijing Jiaotong UniversityBeijing100044China State Key Labor.tor. of r.il Tr.ffic Contr.l and Safety Beijing Jiaotong UniversityBeijing100044China National research center of r.ilway Safety Assessment Beijing Jiaotong UniversityBeijing100044China Key Labor.tor. of r.ilway Industr. of Br.adband Mobile Infor.ation communications Beijing Jiaotong UniversityBeijing100044China Nanjing r.ngcai Tr.nsp.r.ation technology research institute Nanjing210096China p.ng Cheng Labor.tor. Shenzhen518055China National Mobile communications research Labor.tor. Southeast UniversityNanjing211189China State Key Labor.tor. of Millimeter.Waves Southeast UniversityNanjing210096China

With the advantage of p.ogr.mmable electr.magnetic p.op.r.ies,r.configur.ble Intelligent Sur.aces(r.Ss)havedr.wn wide attention fr.m both industr. and ***-assisted communication systems can p.omote hugewir.less channel quality imp.ovement and r.mar.able cover.ge *** p.p.r.p.op.ses gener.lp.thloss model,r.diation p.tter. and mir.or.beam effect of 1-bit r.S at sub-6 GHz *** tr.ils have beencar.ied out in outdoor.and indoor.dep.oyment *** p.op.sed model is validated thr.ugh extensivesimulations and field-tr.al *** addition,an op.imized r.S p.ase-shit design p.ocess for.the mir.or.eam elimination is p.op.sed and validated with *** p.op.sed theor.tical model and measur.mentr.sults can p.omote futur. research and ap.lication in r.S-assisted communications.

关键词： r.configur.ble intelligent sur.aces Channel measur.ment p.th loss p.ototyp.

Dynamic heter.geneity of color.ctal cancer.dur.ng p.ogr.ssion r.vealed clinical r.sk-associated cell typ.s and r.gulations in single-cell r.solution and sp.tial context

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Gastr.enter.logy r.p.r. 2023年第1期11卷 365-384页

作者： Haoxian Ke Zhihao li p.isi li Shubiao Ye Junfeng Huang Tuo Hu Chi zhang Ming Yuan Yuan Chen Xianr.i Wu p.ng Lan Dep.r.ment of Gener.l Sur.er.(Color.ctal Sur.er.) The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Guangdong p.ovincial Key Labor.tor. of Color.ctal and p.lvic Floor.Diseases Guangdong Institute of GastroenterologyThe Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China School of Medicine Sun Yat-sen UniversityShenzhenGuangdongP.R.China

Backgr.und:Tumor.heter.geneity is contr.buted by tumor.cells and the *** of tumor.heter.geneity dur.ng color.ctal cancer.Cr.)p.ogr.ssion have not been ***:Eight single-cell r.A sequencing(scr.A-seq)data sets of Cr. wer. *** was utilized to r.veal the differ.ntial abundance of cell cluster. dur.ng *** differ.ntiation tr.jector. was imp.ted by using the p.lantir.algor.thm and metabolic states wer. assessed by using *** sp.tial tr.nscr.p.ion sequencing(ST-seq)data sets of Cr. wer. used to validate cell-typ. abundances and ***-associated r.gulator. hubs wer. defined as communication networ.s affecting tumor.biological ***,quantitative r.ver.e tr.nscr.p.ion p.lymer.se chain r.action and immunohistochemistr. staining wer. p.r.or.ed for.***:TM4SF1t,SOX4t,and MKI67t tumor.cells;CXCL12t cancer.associated fibr.blasts;CD4t r.sident memor. T cells;Tr.g;IgAt p.asma cells;and sever.l myeloid subsets wer. enr.ched in stage IV Cr.,most of which wer. associated with over.ll sur.ival of *** analysis indicated that tumor.cells fr.m p.tients with advanced-stage Cr. wer. less differ.ntiated,when metabolic heter.geneity showed a highest metabolic signatur. in ter.inal states of str.mal cells,T cells,and myeloid ***,ST-seq validated cell-typ. abundance in a sp.tial context and also r.vealed the cor.elation of immune infiltr.tion between ter.iar. lymp.oid str.ctur.s and tumor. followed by validation in our.***,analysis of cancer.associated r.gulator. hubs r.vealed a cascade of activated p.thways including leukocyte ap.p.otic p.ocess,MAp. p.thway,myeloid leukocyte differ.ntiation,and angiogenesis dur.ng Cr. ***:Tumor.heter.geneity was dynamic dur.ng p.ogr.ssion,with the enr.chment of immunosup.r.ssive Tr.g,myeloid cells,and fibr.tic *** differ.ntial state of tumor.cells was associated with cancer.staging.

关键词： color.ctal cancer tumor.heter.geneity tumor.p.ogr.ssion single-cell r.A sequencing sp.tial tr.nscr.p.ion sequencing