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对于渐冻症或脑卒中患者而言,当身体被禁锢,大脑却依然活跃时,脑机接口(BCI)是其与世界重建联系的唯一希望。英语BCI飞速进步,但中文——这门拥有复杂声调和庞大字符集的语言,始终是横亘在神经解码领域的一座高山。

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对于渐冻症或脑卒中患者而言,当身体被禁锢,大脑却依然活跃时,脑机接口(BCI)是其与世界重建联系的唯一希望。英语BCI飞速进步,但中文——这门拥有复杂声调和庞大字符集的语言,始终是横亘在神经解码领域的一座高山。

. 国产脑机接口跨过声调这座大山,实现汉语音节解码. 科技导报, 2025 , 43 (22) : 9 -9 .
. Science & Technology Review, 2025 , 43 (22) : 9 -9 .
对于渐冻症或脑卒中患者而言,当身体被禁锢,大脑却依然活跃时,脑机接口(BCI)是其与世界重建联系的唯一希望。英语BCI飞速进步,但中文——这门拥有复杂声调和庞大字符集的语言,始终是横亘在神经解码领域的一座高山。
2025年11月5日,《Science Advances》上的一项研究宣告了这一僵局的打破。来自中国科学院上海微系统与信息技术研究所传感器技术全国重点实验室周志涛研究员与复旦大学附属华山医院吴劲松主任医师、上海脑虎科技有限公司陶虎研究员的联合团队,成功研发出一种能够实时解码“全谱系”中文的脑机接口系统。
目前,英语BCI主流方案是解码“音素”(Phonemes),就像拼乐高一样把单词拼出来。但在中文里,这条路很难走通。中文是单音节语言,且严重依赖声调——同一个发音,声调不同,意思天差地别(例如“妈”和“马”)。如果只解出音素,会面临海量的同音字干扰,稍有偏差,输出的句子就会南辕北辙。
研究团队另辟蹊径,放弃了西方的“音素”路线,转而抓住了中文的灵魂——带声调的音节。他们提出,音节比音素更稳定,也包含更完整的语义。为了验证这一思路,团队招募了一位43岁的女性癫痫患者,在她的大脑左侧颞上回、运动皮层等关键语言区域,植入了一块拥有256个通道的高密度柔性皮层脑电(ECoG)电极阵列。当这位受试者看着屏幕上的汉字并在脑中尝试朗读时,电极阵列精准捕捉到了神经元的每一次“高频脉冲”。研究人员设计了一套精巧的“双流解码器”:一路专门识别音节(是什么音),另一路专门识别声调(是第几声)。这2路信号在毫秒间汇合,转化为汉语拼音,再通过类似手机输入法的语言模型,结合上下文联想,最终敲定屏幕上显示的汉字。
仅经过9天训练,系统性能便显示出优势:对394个常用汉语音节(覆盖汉语总音节98% 以上,未覆盖者均为受试者不认识的生僻音节)的纯神经解码平均准确率达71.2%,单音节解码延时仅65 ms,实时汉语语句解码速率达49.6字/分钟,基本满足日常交流需求。为展示实际应用潜力,研究人员还搭建了脑机交互平台,让受试者通过“脑控语音”下达指令,驱动机械臂抓取物体,控制数字虚拟人开口说话,甚至向接入的大语言模型提问、对话。
目前,这一系统仍属于原型阶段,与多数英文语音脑机接口类似,需要侵入式高密度皮层电极,对临床条件和患者配合度要求较高。该研究只基于一位癫痫患者,尚难代表更广泛人群;实时系统中,部分发声起始仍依赖声学信号而非完全由脑电触发,距离真正意义上的“无声交流”还有一定距离。
(综合:《Science Advances》、中国科学院上海微系统与信息技术研究所传感器技术全国重点实验室、上观新闻)

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2种不同金属材料的力学参数

Family
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genus
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Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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